191 results on '"Yan Peng"'
Search Results
2. Experimental Study on Dynamic Responses of a New Type of Debris Flow Dam under Solid Impact Load
- Author
-
Yan Peng Zhu, Jun Jie Li, and Xiu Li Wang
- Subjects
Engineering ,Deformation (mechanics) ,business.industry ,Stiffness ,General Medicine ,Structural engineering ,Debris flow ,Vibration ,Acceleration ,Solid mechanics ,medicine ,Geotechnical engineering ,medicine.symptom ,Reduction (mathematics) ,business ,Displacement (fluid) - Abstract
Dams can effectively alleviate great debris flow hazards to downstream regions, so they has been widely applied to prevention and control engineering of debris flow disaster now. A kind of steel-concrete combined structure with steel braces was presented based on conventional gravity dams, and the superiority of the new structure in terms of impact resistance was verified contrastively by means of model experiments under solid impact. The results show that braces can restrain cracks and reduce their width, thus the extent of damage in impact areas is alleviated effectively. Compared with the conventional dam, the dynamic strains and acceleration peak values of the dam with braces both observably reduce, and the highest reduction ranges of them may be up to 69.2% and 47.8% respectively, so the deformation and vibration are limited by the braces. The dynamic displacement peak values of the new-type dam are significantly less than the conventional dam, and the average reduction range of this index can reach to about 46%, so the structural stiffness has been enhanced by a large margin.
- Published
- 2015
3. Removal of Organochlorine Pesticides in Constructed Wetlands
- Author
-
Hong Li, Yan Peng Liang, and Hong Hu Zeng
- Subjects
geography ,geography.geographical_feature_category ,Environmental engineering ,Constructed wetland ,food and beverages ,Organochlorine pesticide ,Environmental science ,Wetland ,General Medicine ,Contamination - Abstract
Organochlorine pesticides have had a wide and long history of applications in many countries around the world, which cause serious environmental problems. Constructed wetlands are considered an effective means of removal of organochlorine pesticides. This study describes the constructed wetland and applications of organochlorine pesticides contamination in constructed wetlands, and focuses on purification for organochlorine pesticides of microorganisms and plants in constructed wetlands. Then discussed constructed wetlands removal influence factors of organochlorine pesticides. And put forward some recommendations in research.
- Published
- 2014
4. Research Development on Water Quality Criteria
- Author
-
Hong Hu Zeng, Yan Peng Liang, and Lu Mei Qin
- Subjects
Computer science ,Environmental engineering ,Water environment ,Scientific experiment ,Research development ,General Medicine ,Water quality ,Environmental economics ,Blank - Abstract
Water quality criteria (WQC) is based on the results of scientific experiments and inferences, which prescribe a limit threshold value to pollutants and other harmful factors in water. The system of water quality criteria study is basically a blank circumstance. It’s urgent to establish water quality criteria to adapt with the characters of China water environment to supply theoretic bases for revising water quality standards and managing environment. In this paper, an overview of the water quality criteria, as well as domestic and foreign research progress in theoretical methodology are systematically discussed, furthermore, considering current status of water quality criteria, comprehensive research were pointed out to be done in the future.
- Published
- 2014
5. Study on Dynamic Management System of City Infrastructure Construction Projects Based on Web Technology
- Author
-
Yan Peng
- Subjects
Construction management ,Information management ,Engineering ,Spatial data infrastructure ,Collaborative software ,business.industry ,Control (management) ,General Medicine ,Construction engineering ,Engineering management ,Converged infrastructure ,Dynamic management ,business ,China - Abstract
The article analyzes the current situation of city infrastructure construction in China, elaborated needs if our country city infrastructure construction projects in various stages of information management, a framework of information platform are presented for city infrastructure projects of our construction comprehensive control, and efficient management city infrastructure construction project, and provide collaboration platform for the party in the infrastructure construction projects.
- Published
- 2014
6. Comparing Different Kinds of Materials for Adsorption of Methylene Blue
- Author
-
Yan Peng Shi, Jian Rong Chen, Shun Xian Zhong, and Meng Lu Wu
- Subjects
chemistry.chemical_compound ,Materials science ,Adsorption ,Aqueous solution ,chemistry ,Chemical engineering ,Graphene ,law ,Composite number ,Nanometre ,General Medicine ,Methylene blue ,law.invention - Abstract
Methylene blue is an organic dyestuff and damaged to human beings. Graphene-based composite is a new type of nanometer materials and with outstanding adsorption capacity of methylene blue than other materials in aqueous solution. This paper summarized and compared the difference among graphene, graphene-based composites and other materials in removing methylene blue in aqueous solution.
- Published
- 2014
7. Synchronization of Hyperchaotic Memristor-Based Chua’s Circuits
- Author
-
Yan Peng, Jun Jian Huang, and Hai Long Huang
- Subjects
Chua's circuit ,Lyapunov stability ,law ,Computer science ,Control theory ,Synchronization (computer science) ,Stability (learning theory) ,General Medicine ,Memristor ,Synchronization ,Electronic circuit ,law.invention - Abstract
This paper further investigates the problem of synchronization of hyperchaotic memristor-based Chua’s circuits. An active control method is employed to design a controller to achieve the global synchronization of two identical memristor-based systems. Based on Lyapunov stability theory, a sufficient condition is given to guarantee the stability of the synchronization error system.
- Published
- 2014
8. Influence of Seepage on Embedded Depth for Anchored Pile Supporting
- Author
-
Yong Zhou, Yan Peng Zhu, and Yong Zhong Ren
- Subjects
Permeability (earth sciences) ,geography ,geography.geographical_feature_category ,Flow velocity ,Loess ,Maximum flow problem ,Bending moment ,Aquifer ,Geotechnical engineering ,General Medicine ,Vertical displacement ,Pile ,Geology - Abstract
In the present code, the embedded depth is determined on the multi-pivot support structure to consider the impact of seepage less, and it is verified by anti-seepage stability for single layer aquifer, while the embedded depth is determined not expressly provide for heterogeneity aquifer of the coefficient of permeability difference. However, in the northwest loess areas, the formation is complex, permeability coefficient is variations. To solve this problem, the arctic investigates change law that the impacts of embedded depth variation change on bending moment, the vertical displacement of bottom and maximum flow velocity under seepage, and made a qualitative research model. And the impact of seepage on the embedded depth cannot be ignored and a greater impact on the stability of the pit.
- Published
- 2014
9. Data Provenance Tracing for Transformation Diagram Based on Wivern
- Author
-
Yan Peng Zhao, Xiaoyu Zhang, and Chao Fan Dai
- Subjects
Transformation (function) ,Computer science ,Property (programming) ,Diagram ,Process (computing) ,Inverse ,General Medicine ,Data mining ,Construct (python library) ,Tracing ,computer.software_genre ,computer ,Data warehouse - Abstract
This Paper introduces the complete process of data provenance tracing for transformation diagram based on Wivern: at first, we construct the candidate weak derivation-sets using continued-tracing weak inverse attribute mapping, then verify them according the type and property of transformation and attribute mapping.
- Published
- 2014
10. Lighting Control System Based on Smart Phone and Bluetooth
- Author
-
Jia Yuan Wang, Yan Peng, and Kai Xia
- Subjects
Engineering ,Automatic control ,Multimedia ,Smart phone ,business.industry ,General Medicine ,computer.software_genre ,law.invention ,Bluetooth ,Lighting control system ,law ,Home automation ,Embedded system ,Mobile telephony ,Android (operating system) ,business ,computer - Abstract
With the rapid development of the Smartphone in recent years, it has been a popular personal mobile communication device. How to make the Smartphone be a better service for our lives is an important direction of research in our smart home. This article describes how to integrate the Android, Bluetooth technology into the control of lighting equipment to realize the lighting equipment’s power automatic switching.
- Published
- 2014
11. Study on Dynamic Calculation Method of Anti-Slide Pile
- Author
-
Yan Peng Zhu and Tian Zhong Ma
- Subjects
business.industry ,Equations of motion ,Geotechnical engineering ,Landslide ,General Medicine ,Structural engineering ,Pile ,business ,Geology ,Seismic analysis - Abstract
A dynamic calculation model of the pile supporting structure with single prestressed anchor for the slope is proposed in this paper. The motion equation of the pile-prestressed anchor is established and the analytical solutions are obtained. In addition the proposed method is applied to a project case to carry out the seismic analysis and design of the pile supporting structure with single prestressed anchor. The calculation model provides a new approach for earthquake analysis and seismic design of slope supported by pile supporting structure with pre-stress anchor.
- Published
- 2014
12. Study on Deformation Property of Coarse Particles (Sulfate) Saline Soil with Field Test
- Author
-
Yan Peng Zhu, Hai Zhen Mi, Ya Feng Liu, and Peng Yang
- Subjects
chemistry.chemical_classification ,Soil salinity ,Field (physics) ,Foundation (engineering) ,Salt (chemistry) ,Soil science ,General Medicine ,Deformation (meteorology) ,Stress (mechanics) ,chemistry.chemical_compound ,chemistry ,Geotechnical engineering ,Sulfate ,Water content ,Geology - Abstract
Salt expansion was the main diseases of the salty foundation. In order to study the deformation regularity and quantitative description of coarse particles saline soil ground in natural condition, a field test was conducted in Dunhuang area. The exploratory well with 7.5 m depth (deeper then annual temperature change layer) was excavated on site, and the data of salt content \water content \ground temperature \salt expansion rate were collected. From the test it was found that : salt expansion mainly decided by salt content, salt content and salt expansion rate have approximately a quadratic function relationship; the minimum salt content could cause soil expansion is 1.5‰; The salt expansion force was strong, and the gravitational stress could not suppress the deformation.
- Published
- 2014
13. Clock Domains Cross FIFO Interface Design of Multichannel Continuous DDR2 Read and Write
- Author
-
Xuanqi Chen, Ping Li, Guo Cheng Wang, Yan Peng Ma, and Hai Tao Lu
- Subjects
Hardware_MEMORYSTRUCTURES ,Finite-state machine ,FIFO (computing and electronics) ,Computer science ,business.industry ,Reading (computer) ,Interface (computing) ,General Medicine ,computer.file_format ,Synchronization ,Data conversion ,business ,computer ,Computer hardware - Abstract
In this paper, a clock domains cross FIFO interface of multichannel continuous DDR2 read and write is designed. The interface provides continuous data stream from DDR2 to 12 different channels simultaneously. Four core issues are resolved: mismatch on bit width between DDR2 user interface and the channels, data stream conversion control from DDR2 to channels, clock domains difference between DDR2 and channels, Discontinuous process of DDR2 read and write. DDR2 storage spaces are partitioned for matching data width of the DDR2 user interface and the channels, and to achieve the maximum utilization of the DDR2 memory. Via state machine, data conversion and synchronization from DDR2 to channels are implemented, and the state machine can be applied to providing continuous DDR2 data to any numbers of channels simultaneously. Cross clock domains FIFO interface goes to solve the different clock domains problem between channels and DDR2. When bank or row addresses conversion occurs, or DDR2 auto-refresh cycle comes, DDR2 cannot be read or written, leading to data interruptedly in time aspect. To solve the problem, the FIFO interface is designed followed the full-mode handshake protocol. Through the interface caching, the 12 channels can continuously read data from the DDR2 simultaneously. The final design can achieve the goal that under the fastest case, DDR2 provides 12 channels data stream simultaneously at 61.538 MHz rate at the same time, and 90.566% efficiency in the reading and writing aspects.
- Published
- 2014
14. Effects of Graphene Oxide on the Structure of Human γ-Globulins
- Author
-
Chang Ren Zhou, Ru Feng, and Yan Peng Jiao
- Subjects
Circular dichroism ,chemistry.chemical_compound ,Materials science ,chemistry ,Graphene ,law ,Uv absorption ,Oxide ,γ globulin ,Nanotechnology ,General Medicine ,Photochemistry ,law.invention - Abstract
Graphene and its derivatives have become great concern in biomedical fields. Though many investigations about their toxicity have been reported, investigation on the interaction with γ-globulins is lacking. In this work, we studied the effects of the graphene oxide (GO) on the structure of γ-globulins by UV absorption spectra, circular dichroism (CD) and fuorescence spectra. The results showed that GO could alter the secondary structures and conformation. The results obtained in this study provided good insight into understanding the biomedical application of GO in vivo.
- Published
- 2014
15. Ball Valve Seat Design Method Based on Finite Element Analysis and Calculation
- Author
-
Yan Peng, Liang Yu Zong, Qi Yang Li, and Liu Feng Hao
- Subjects
Surface (mathematics) ,Engineering ,business.industry ,Valve seat ,Ball valve ,Angle seat piston valve ,General Medicine ,Structural engineering ,Valve guide ,business ,Technology CAD ,Finite element method ,Globe valve - Abstract
The face of the valve seat sealing surface design, the finite element analysis and calculation of ball valve seat sealing surface and angle of the design method is studied. Through 3D CAD technology for ball valve design, guide 3D design model to finite element analysis software to calculate ,reveal the sealing load distribution of pressure in the valve seat sealing surface, sealing pressure values are obtained, through the valve seat sealing surface design Angle analysis, to obtain the optimal value of sealing surface angle.
- Published
- 2014
16. Study on the Pharmaceutical Distribution Enterprise IT Adoption Influencing Factors Model
- Author
-
Yan Peng He and Chun Cai Lin
- Subjects
business.industry ,Technology strategy ,Information technology ,National Policy ,General Medicine ,Business ,Enterprise it ,Human resources ,Industrial organization - Abstract
With the national policy changes, pharmaceutical distribution companies using information technology to improve the competitiveness of enterprises was imperative. This paper took TAM and TOE as theoretical framework. And then combined pharmaceutical distribution business characteristics,the pharmaceutical distribution enterprise IT adoption influencing factors model was conducted with technical, organizational and environment organizational characteristics. The empirical results supported that relative advantages, compatibility, complexity, firm characteristic, leadership support, human resources investment, information technology strategy, relation of competition and cooperation, and government support had great influence on enterprise adoption.
- Published
- 2014
17. The Design of a Filter System for ECG Signal
- Author
-
Zhi Gang Qin and Yan Peng
- Subjects
Engineering ,Preamplifier ,business.industry ,Process (computing) ,General Medicine ,Filter (signal processing) ,Signal ,Power (physics) ,Interference (communication) ,Electronic engineering ,Common-mode signal ,cardiovascular diseases ,Ecg signal ,business - Abstract
According to the process of the ECG signal extraction, the ECG signal is susceptible to interference which will affect the quality and effect of ECG test. In this essay, we designed an ECG signal filtering system based on ARM. It can filter the interference signal and reduce the interference of the common mode signal and power frequency, through the design circuit of the preamplifier, post amplification, filtering, notch filtering, and power amplification. Thus, ECG signal will be better collected and met the best demand.
- Published
- 2014
18. The Analysis on Spatial Network of Organic Agriculture Certification Center in China
- Author
-
Yan Peng Li, Yu Hua Wang, and Bo Xuan Gu
- Subjects
Service (systems architecture) ,Spatial network ,ComputingMilieux_THECOMPUTINGPROFESSION ,Beijing ,Agriculture ,business.industry ,Organic farming ,General Medicine ,Business ,Certification ,Environmental economics ,Organic certification ,China - Abstract
With the development of organic agricultural certification, organic certification company as a professional economic form to organize organic certification activities with information service function is well aware of growing importance. Organic agricultural certification spatial network is composed of company organizing network and service network of organic certification, whose united operation generates the spatial network of organic certification. Much attention is paid to the spatial network of organic certification company. The organic agricultural information centers in China are classified into three types: monolayer endogenous type, monolayer radiation type and multilayer divergence type. This paper analyses the spatial networks of organic certification information centers of Nanjing and Beijing. The interaction between company organizing network and service network of organic certification spatial network is one of the main drivers of Chinese organic agriculture.
- Published
- 2014
19. Study on the Spatial Organization of Organic Agricultural Enterprise Network in China
- Author
-
Yu Hua Wang, Bo Xuan Gu, and Yan Peng Li
- Subjects
Strategic planning ,Embeddedness ,Agriculture ,business.industry ,Central government ,Regional science ,Enterprise private network ,Organizational structure ,General Medicine ,Business ,China ,Natural resource - Abstract
Document NO.1 of the Central Government and the report of the eighteenth National Congress has aroused widespread concern in academic circles with its emphasis on rural micro-management body, while research on spatial organization of organic agricultural enterprise under the paradigm of enterprise network is still insufficiency. The paper analyzed the organic agricultural spatial organization of headquarters, processing factories and bases in China by the end of 2012, which reflects the overall development level of the enterprise network is low, and the organizational structure shows an inverted "T" type distribution. Heilongjiang, Zhejiang, Shandong and Sichuan provinces scale the highest level. Regional organizations are quite different on spatial distribution, while strong networking provinces mainly gather in the east coast, northeast and west regions, and due to the strength of the dominant organizational functions, provinces can be divided into seven types, such as headquarters-type, base-type, headquarters-processing type. Natural resources, geographical embeddedness, institutional environment, flexible production level and regional innovation capability are the five drivers of spatial organization, and measures can be taken to develop organic agriculture from four aspects of policy guidelines, strategic planning, marketing planning and technical guidance.
- Published
- 2014
20. Characteristics of Organochlorine Pesticides Residues and Research Progress of Migration and Transformation in Soil
- Author
-
Hong Hu Zeng, Yan Peng Liang, Gong Ning Chen, and Li Tang Qin
- Subjects
Pollutant ,Pollution ,media_common.quotation_subject ,Environmental chemistry ,Environmental engineering ,Environmental science ,Organochlorine pesticide ,General Medicine ,media_common - Abstract
Organochlorine pesticides (OCPs), which is widely distributed in the environment, long residual period, semi volatile, high toxicity of persistent organic pollutants (pops), can migrate for long distances through a variety of environmental medias. In this study, we introduced the OCPs on the ways of pollution in the environmental soil and its characteristics of residues. We discussed the migration and transformation of OCPs in the environmental soil.
- Published
- 2014
21. Research Development on Constructed Wetlands
- Author
-
Yan Peng Liang, Lu Mei Qin, and Hong Hu Zeng
- Subjects
Engineering ,geography ,geography.geographical_feature_category ,business.industry ,media_common.quotation_subject ,Wetland ,General Medicine ,Combined technique ,Civil engineering ,Constructed wetland ,Sewage treatment ,Research development ,business ,Function (engineering) ,Environmental planning ,media_common - Abstract
Constructed wetland is a mode of economical and highly effective system applied in wastewater treatment with special removal mechanism function, which has drawn much attention over the world constantly. On the basis of study from abroad, this article makes the brief induction of removal mechanism, influential factors and combined technique of constructed wetlands, for the further research works were also put forward in the next future.
- Published
- 2014
22. Progress on OCPs and Chronic Disease
- Author
-
Yan Peng Liang, Ru Qiong Qin, Li Tang Qin, Ling Yun Mo, and Hong Hu Zeng
- Subjects
business.industry ,Environmental engineering ,Organochlorine pesticide ,General Medicine ,Biology ,Human reproduction ,Food chain ,Agriculture ,Environmental health ,Endocrine system ,Reproductive toxicity ,business ,Environmental degradation ,Reproductive health - Abstract
The organochlorine pesticides (OCPs) including a large group of insecticides were widely used in the world in the agriculture and household. OCPs are organic compounds that are resistant to environmental degradation, bioaccumulated in body, and enlarged in the food chain, they are great harm to humans and animals. Although OCPs have been banned for about 40 years, they are still remained in the environment. OCPs are toxic to human and animals, and some compounds have been identified as carcinogenic, mutagenic, and teratogenic. OCPs are also considered as endocrine disruptors, which interfere with the hormone system and can cause birth defects, reproductive and developmental disorders, as well as some cancerous tumors. There is ongoing concern over the risks to human and wildlife reproductive health of OCPs. This overview introduces the effects of OCPs on human reproduction.
- Published
- 2014
23. Research on Fault Diagnosis Method of Steam Turbine Unit Based on the Theory of Super Ball
- Author
-
Xiao Wen Deng, Yan Peng Han, Cheng Cheng Wang, and Yu Jiong Gu
- Subjects
Vibration ,Engineering ,Control theory ,Steam turbine ,business.industry ,Ball (bearing) ,General Medicine ,Cluster analysis ,business ,Hierarchical clustering - Abstract
A fault diagnosis method of steam turbine based on the theory of super ball is proposed, which combines density clustering with hierarchical clustering. The correlation of vibration and thermal parameters is introduced as the clustering factors. The efficiency of diagnosis,the sensitivity of noise and the accuracy of diagnosis are improved. Experiments show that the method and the selection of clustering factor are feasible.
- Published
- 2014
24. Testing and Analysis of Bearing Capacity on Pile Foundation
- Author
-
Chun Jing Lai, Yan Peng Zhu, Tian Zhong Ma, and Ze Xue Bao
- Subjects
Engineering ,business.industry ,Foundation (engineering) ,General Medicine ,Structural engineering ,Foundation engineering ,computer.software_genre ,Dynamic load testing ,Test (assessment) ,Load testing ,Geotechnical engineering ,Bearing capacity ,business ,Pile ,computer - Abstract
The application of pile foundation is promoted by the rapid development of the high speed railway, highway, high-rise buildings and big volume weight of building. However, the static load test and low strain test play a very important role in pile foundation inspection and ensurement of the quality of pile foundation engineering. In this paper, combined with the engineering of the basis of a hospital in lanhou, the author analyzed the results of 7 test piles static load test and a large number of low strain test and summarised pile testing contents and methods. At the same time,the bearing capacity of anchor pile in static load test is discussed.
- Published
- 2014
25. Research on Information Supervision System of City Infrastructure Construction Project
- Author
-
Yun Na Wu and Yan Peng
- Subjects
Engineering ,Knowledge management ,business.industry ,Program management ,General Medicine ,Earned value management ,Project charter ,Engineering management ,Project planning ,Information technology management ,Project portfolio management ,Project management ,business ,Project management triangle - Abstract
In order to solve the existing project management information chain, decentralized management, low efficiency problems. This paper put forward ideological based on the main line information technology means and multi-dimensional integration principle. And the paper comprehensively consider a kind of integrated management mode for various factors related with the project from the decision-making stage to put to use in all phases.
- Published
- 2014
26. Investigation on TiCP/Al Composite Coating by TIG Cladding
- Author
-
Yan Peng Li, Wen Bo Tang, and Cong Hui Lu
- Subjects
Cladding (metalworking) ,Materials science ,Gas tungsten arc welding ,Metallurgy ,chemistry.chemical_element ,General Medicine ,engineering.material ,Microstructure ,Coating ,chemistry ,Aluminium ,Phase (matter) ,engineering ,Particle ,Porosity - Abstract
TiCp/Al composites coating was in-situ synthesized on the L1060 alloy surface by TIG cladding. The microstructure and the phase of the coating were analyzed by OM, SEM, ADS and XRD, and the properties was been tested by micro-hardnessmeter and wear testing machine. The results show that the composite coating has no porosity, inclusions and other defects. The microstructure of the composite coating mainly consists of TiC particle and aluminum. Microstructural evidence suggests that the formation of TiC occur not only by reaction between Ti dissolved in Al and Al4C3, but also by reaction between C dissolved in Al and Al3Ti. The hardness of the composite coating obtained by TIG cladding is up to 120HV0.2. The wear resistance of composite coating is 1.6 times more than that of the matrix.
- Published
- 2014
27. Research of the Health Monitoring System Scheme for High Slope in Zhouqu
- Author
-
Jing Bang Li, Yan Peng Zhu, and Qiang Zhang
- Subjects
Engineering ,business.industry ,Slope stability ,Process (computing) ,Geotechnical engineering ,Monitoring system ,General Medicine ,Deformation (meteorology) ,Internal forces ,business - Abstract
The target of this paper is to get proper information of deformation through monitor the health of a large-scale trial. The slope in the process of the governance and reinforced slope are designed in the test in Zhouqu County, Gansu Province. Through Health Monitoring Test to high slope, the teat is to master deformation and internal force changes of the supporting structure, meanwhile determine the trend of slope deformation. It is possible to send out the warning for slope stability. Through researching the program and analyzing the data of future monitoring, it provides a reliable basis of similar slope engineering for future.
- Published
- 2014
28. Diagnosis Method Study of Transformer Windings Deformation Basing on Sweep Frequency of Short-Circuit Impedance
- Author
-
Yuan Xu, Ning Yang, Yan Peng Gong, Wen Huan Wang, Jian Gang Bi, and Yuan Yang
- Subjects
Image impedance ,Engineering ,business.industry ,Impedance matching ,Electronic engineering ,Damping factor ,Output impedance ,Quarter-wave impedance transformer ,General Medicine ,business ,Dual impedance ,Characteristic impedance ,Sweep frequency response analysis - Abstract
Combing the advantages of frequency response method with the advantages of short-circuit impedance method, put forward the sweep frequency short-circuit impedance method. Analyse the windings deformation basing on the mutual difference of short-circuit impedance at different frequencies. The validity of this method is preliminary verified at last.
- Published
- 2013
29. Influence of Ge and Si Doping on the Microstructure and Dielectric Properties of Barium Titanate Ceramics
- Author
-
Shao Hua Gong, Li Na Bing, Wei Wu, Hong Yan Peng, and Zhen Jiang Shen
- Subjects
Tetragonal crystal system ,chemistry.chemical_compound ,Materials science ,chemistry ,Barium titanate ,Doping ,Analytical chemistry ,Relative permittivity ,Dielectric loss ,Grain boundary ,General Medicine ,Dielectric ,Microstructure - Abstract
GeO2 has been doped solely and together with SiO2 into barium titanate ceramics by mixing and calcination. The microstructure and dielectric properties of doped BaTiO3 have been characterized. When doped in BaTiO3, Ge4+ ion could incorporated into the crystal lattice of BaTiO3 to occupied Ti4+ sites. For relative smaller Ge4+ ion, the tetragonal phase could be enhanced. As dielectric properties have strong relation to tetragonal phase. The relative permittivity could be increased in this mechanism. However, the high leakage current which induced by more ionic defect was also lead to high dielectric loss. Besides, the assemble in grain boundary by Ge4+ ion may also have effect. Results on the GeO2-SiO2 co-doped sample showed that the mechanisms of Ge doping and Si doing could happen at one time.
- Published
- 2013
30. Concrete Crack Control in Monolithic Concrete Bed Construction of High-Speed Railway in Northwest Area of China
- Author
-
Yan Peng Zhu, Xian Zhou Tang, Xian Xi Tang, and Wei Guo
- Subjects
Cracking ,Engineering ,Process (engineering) ,business.industry ,Forensic engineering ,General Medicine ,business ,China - Abstract
There were some reasons which cause the concrete cracks in monolithic concrete bed construction of high-speed railway. In this paper, combined with the specific situation of monolithic concrete bed construction of high-speed railway in northwest area of China, the states and causes of two kinds of cracks in monolithic concrete bed of high-speed railway were analyzed, the concrete cracking control measures were discussed from the concrete mixture ratio, construction technology and maintenance measures and other aspects, and the corresponding views were put forward. The study results had the important guiding significance on crack controls of concrete structure during the construction process of northwest area.
- Published
- 2013
31. Electromagnetic Identification Intelligent Vehicle System Design
- Author
-
Han Ming Zheng, Yan Peng Zhang, and Yong Gang Ji
- Subjects
Engineering ,Electronic speed control ,Microcontroller ,Motor drive ,business.industry ,Design flow ,Process (computing) ,Systems design ,Schematic ,Software design ,Control engineering ,General Medicine ,business - Abstract
This paper introduces the electromagnetic identification intelligent vehicles hardware system design diagram and software design process based MC9S12XSl28 microcontroller, focusing on the design of intelligent vehicle power unit circuit, the electromagnetic signal amplification circuit, the motor drive module, gives a detailed schematic. Software design give a specific design flow, integrated hardware and software design constitutes intelligent vehicles overall system.
- Published
- 2013
32. Single-Machine Scheduling with Resource-Dependent Learning Effect and Deteriorating Jobs
- Author
-
Chuan Li Zhao and Yan Peng Fan
- Subjects
Mathematical optimization ,Single-machine scheduling ,Computer science ,Tardiness ,Scheduling (production processes) ,Resource allocation ,General Medicine ,Assignment problem ,Time complexity ,Deadline-monotonic scheduling ,Learning effect ,Scheduling (computing) - Abstract
This paper considers single-machine due-window assignment and scheduling with learning effect and resource-dependent processing times. The processing time of a job is a function of its position in a sequence, its starting time, and its resource allocation. The objective is to determine the optimal sequence of jobs and optimal resource allocation so as to minimize the sum of earliness, tardiness, due-windows and resource and operation time cost, the considered problem is molded as an assignment problem and can be solved with a polynomial time algorithm.
- Published
- 2013
33. Experimental Study on Strain Performance of Tensile Reinforcement under Fatigue Loads
- Author
-
Yan Peng Zhu, Jin Bao Liang, Xian Zhou Tang, Xian Xi Tang, and Yue Xu
- Subjects
Materials science ,Strain (chemistry) ,business.industry ,General Medicine ,Structural engineering ,computer.software_genre ,Load testing ,Amplitude ,Linear relationship ,Reinforced concrete slab ,After effect ,Ultimate tensile strength ,Reinforcement ,business ,computer - Abstract
As for the study on the strain performance of tensile reinforcement under the fatigue loads with amplitude of certain values, two groups of reinforced concrete slab bridge specimen were made. The fatigue test was carried out on one group of specimen, and the corresponding static load test was carried out on another group of specimen, the experimental study on the strain performance of tensile reinforcement was carried on bottom of the mid span of slabs. The results of the study shown that, under the fatigue loads at a certain amplitude, the strain performance of the tensile reinforcement tend to be stable with the increase of number of fatigue cycle, the strain value showed certain linear relationship with static load applied. When the fatigue amplitude increased, the change rule of strain with static load value applied was approximately linear, but the strain value increased more than the fatigue amplitude less under the same static load. It could be seen through the comparison of load - strain curve of the static load specimen, after effect of compressive fatigue with certain amplitude, the strain change with load applied was close to linear change, which has great relationship with the effect on concrete and reinforcement plastic deformation by fatigue load. The test results had the vital significance of further research on reinforcement performance under the action of fatigue loads.
- Published
- 2013
34. Prestressed Anchor Bolt Impact on the Deformation of Composite Soil Nailing
- Author
-
Yan Peng Zhu and Deng Qun Wang
- Subjects
Engineering ,integumentary system ,Finite element software ,business.industry ,Composite number ,Foundation (engineering) ,Soil nailing ,General Medicine ,Structural engineering ,Deformation (meteorology) ,Anchor bolt ,Geotechnical engineering ,Displacement (orthopedic surgery) ,Vertical displacement ,business - Abstract
Finite element software was employed to establish a model to simulate the compound soil nailing. The model simulates the process of constructing prestressed compound soil nailing. Compared the condition prestressed with no prestress, analyzed the Impact of prestress anchor on the deformation in the process of construction and the effect on axial force of soil nail. Applying prestress is able to control the horizontal displacement obviously, but has not obvious effect on vertical displacement, especially place the anchor bolt at the lower part of the slope. In the process of construction, prestress has an advance effect on the deformation of foundation pit and the axial force of soil nails near the anchor bolt.
- Published
- 2013
35. Stress Analysis about Flat Ratio and Surrounding Rock of Large Section Highway Tunnel
- Author
-
Xiao Rui Song and Yan Peng Zhu
- Subjects
Engineering ,business.industry ,Finite element software ,General Medicine ,Structural engineering ,Shotcrete ,Displacement (vector) ,Stress (mechanics) ,Section (archaeology) ,Bending moment ,Geotechnical engineering ,Structured model ,Axial force ,business - Abstract
By utilizing finite element software MIDAS-GTS, layer structure model is established and the force situation of large section tunnel under the combination of three sets of surrounding rock and three sets of flat ratio is analyzed. Through comparing axial force of anchor, axial force and bending moment of shotcrete and displacement of the lining, the optimal flat ratio is selected. Results can provide reference for the design of the large section highway tunnel.
- Published
- 2013
36. Evaluating the Spatial Pattern of Organic Agricultural Enterprises in China
- Author
-
Yan Peng Li, Bo Xuan Gu, and Yu Hua Wang
- Subjects
Order (exchange) ,business.industry ,Natural resource economics ,Agriculture ,Environmental engineering ,Organic farming ,Production (economics) ,General Medicine ,Food safety ,business ,China ,Certificate ,Comparative advantage - Abstract
In recent years, considerable worldwide development in organic agriculture has attracted widespread attention from scholars both within and outside China, driven by its effects on environmental protection, food safety and health, international green barriers, At present, most of the existing research focuses on the production technology, development mode and benefit evaluation of organic agriculture, with relatively less concern about the activities of organic agricultural enterprises. Based on the indicators of number of enterprises, number of certificates, and certificate types, this paper analyzes the features characterizing the spatial distribution of organic agricultural enterprises in China. The results show that there are significant spatial variations in degree of diversity, degree of concentration, and evolving trajectories. It suggests that provinces and autonomous regions should give full play to the regional comparative advantages in order to facilitate the development of different types of organic agriculture.
- Published
- 2013
37. The Low Strain Detection Test to Pile-Foundations of a Communication Hinge Engineering
- Author
-
Yan Peng Zhu, Xiu Li Wang, Chang Liu Chen, and Hai Ping Shao
- Subjects
Engineering ,Strain (chemistry) ,business.industry ,Hinge ,Ultrasonic sensor ,General Medicine ,Structural engineering ,Pile ,business ,Dynamic load testing - Abstract
The low strain method has the advantages of simple, fast detection is widely used in the pile testing. The low strain method was presented to pile test on a communication hinge engineering of China Mobile Group Gansu Co.,Ltd. The basic theory, tesing method of pile and judgment standard about the ultrasonic wave method are analyzed.
- Published
- 2013
38. Study of Seismic Design Method for Slope Supporting Structure of Soil Nailing
- Author
-
Yan Peng Zhu, De Ju Meng, Chun Jing Lai, and Tian Zhong Ma
- Subjects
business.industry ,Soil nailing ,Rigidity (psychology) ,General Medicine ,Structural engineering ,Retaining wall ,Seismic analysis ,Acceleration ,Earthquake simulation ,Lateral earth pressure ,Geotechnical engineering ,business ,Intensity (heat transfer) ,Geology - Abstract
Slope anchorage structure of soil nail is a kind of economic and effective flexible slope supporting structure. This structure at present is widely used in China. The supporting structure belong to permanent slope anchorage structure, so the design must consider earthquake action. Its methods of dynamical analysis and seismic design can not be found for the time being. The seismic design theory and method of traditional rigidity retaining wall have not competent for this new type of flexible supporting structure analysis and design. Because the acceleration along the slope height has amplification effect under horizontal earthquake action, errors should be induced in calculating earthquake earth pressure using the constant acceleration along the slope height. Considering the linear change of the acceleration along the slope height and unstable soil with the fortification intensity the influence of the peak acceleration, the earthquake earth pressure calculation formula is deduced. The soil nailing slope anchorage structure seismic dynamic calculation model is established and the analytical solutions are obtained. The seismic design and calculation method are given. Finally this method is applied to a case record for illustration of its capability. The results show that soil nailing slope anchorage structure has good aseismic performance, the calculation method of soil nailing slope anchorage structure seismic design is simple, practical, effective. The calculation model provides theory basis for the soil nailing slope anchorage structure of seismic design. Key words: soil nailing; slope; earthquake action; seismic design
- Published
- 2013
39. Precision Analysis and Simulation of Locating the Single Source Based on Double-UAVs
- Author
-
Jun Luo, Yan Peng, Zhou Hao Ye, Qiu Ju Zhang, and Shao Rong Xie
- Subjects
Computer science ,Direction finding ,business.industry ,Real-time computing ,FDOA ,Computer vision ,General Medicine ,Artificial intelligence ,Multilateration ,business - Abstract
The passive direction finding cross localization has got great achievement and has been widely used in military and civilian fields. Currently, the researches on passive localization have focused on AOA, TDOA and FDOA. In our system, the passive direction finding cross localization is more effective and useful. We use two UAVs to locate a single source. We apply the geometric method to analysis positioning accuracy. In order to study the performance of a passive direction finding cross localization, MATLAB is used to simulate the result. Finally, the simulation results and performance analysis provide operational technical principle for such a system.
- Published
- 2013
40. Analysis of Foundation Non-Uniform Settlement for Building on Collapsible Loess
- Author
-
Shuai Hua Ye, Zhong Mao He, Yuan Xun Li, and Yan Peng Zhu
- Subjects
Engineering ,Settlement (structural) ,business.industry ,Loess ,Frost heaving ,Foundation (engineering) ,Subsidence ,Geotechnical engineering ,General Medicine ,business ,Subsoil - Abstract
The primary causes of non-uniform settlement for buildings on collapsible loess are large settlement of subsoil, local subsidence foundation, frost heaving of ground, infusion foundation, underground water level decrease and the influence of adjacent buildings and so on. According to the characteristics of the project, analysis the reasons of building that non-uniform settlement and fissure on the wall. Combine the method of reinforce the rectification for original building, put forward the method of reinforce the rectification which is applicable to the project. And put forward some suggestions for collapsible loess area construction, for the colleague reference.
- Published
- 2013
41. The Assembly of Nanowires by Dielectrophoresis
- Author
-
Zhizheng Wu, Yan Peng, Jing Zeng, and Mei Liu
- Subjects
Materials science ,Electric field ,Electrode ,Nanowire ,Nanotechnology ,General Medicine ,Dielectrophoresis - Abstract
This review paper introduces the principles and successful examples of dielectrophoresis (DEP) which was used to position nanowires suspended in fluid medium between two electrodes. The main external affect factors of DEP assembly are discussed in detail, including the potential and frequency of applied electric field, the electrode structure, and the concentration of the nanowire solution.
- Published
- 2013
42. The Spatial Distribution and Impact of Organic Certification Information Center in China
- Author
-
Yu Hua Wang, Yan Peng Li, and Bo Xuan Gu
- Subjects
Sustainable development ,Beijing ,Order (exchange) ,Organic farming ,Environmental engineering ,Key (cryptography) ,General Medicine ,Business ,Agricultural productivity ,Organic certification ,Environmental economics ,China - Abstract
Organic certification system is an important part of organic agricultural production network. As the core of information network, Organic certification agencies are pivotal to our understanding of the structure, organization and effects of the network. This paper, taking the spatial distribution, organization and the influential area of the information center as the basis, suggests that the information network of organic agriculture in China is characterized by high degree of unevenness, and hierarchical order in development level. The analysis shows that the whole network can be divided into three tiers. Through a case study of some key areas such as Beijing, Zhejiang and Liaoning, the study put forward some suggestions for the sustainable development of organic information network.
- Published
- 2013
43. Pipeline Support under the Loads of Comparative Analysis
- Author
-
Yan Peng Zhu, Kai Chen, and Kun Qi Yang
- Subjects
Engineering ,Structural load ,business.industry ,Axial displacement ,Bending moment ,Pipeline (Unix) ,General Medicine ,Structural engineering ,business ,computer ,Displacement (fluid) ,computer.programming_language - Abstract
This article mainly analyzed the load of fixed and movable pipe supports in the catalyst factory,then classified the load. A calculation was made using MIDAS/CIVIL software modeling. The results show that the bending moment and displacement are all the same in axial of movable and fixed pipe supports, and the axial displacement is influenced heavily by load. Fixed pipe supports are less affected by lateral load, but movable pipe supports are more affected by lateral load. The results can help us to design the pipe supports reasonably.
- Published
- 2013
44. Theory Study on Similitude Design of Shaking Table Tests of Earthquake-Induced Landslide
- Author
-
Yan Peng Zhu, Chunqing Wang, Chun Jing Lai, and Tian Zhong Ma
- Subjects
Engineering ,Test design ,business.industry ,Wave velocity ,Landslide ,General Medicine ,Structural engineering ,Similitude ,Vibration ,Shear modulus ,Shear (geology) ,Earthquake shaking table ,Geotechnical engineering ,business - Abstract
Based on analysis of characteristics of earthquake-induced landslides and summary of main factors of controlling earthquake-induced landslides, three main factors which are seismic parameters, topography and landforms features and engineering properties of soil are considered the main factor affecting on earthquake-induced landslides. These factors should be focused on to meet the similitude ratio design of the dynamics of landslide in Shaking table test design. Based on study of dynamic similitude law of landslide, the method of changing model soil specifications is used to prepare the model soil which is in accordance with the maximum shear modulus of prototype soil. Also, the engineering properties similitude of model soil is checked by the method of shear wave velocity similitude. By taking the theory of vibration behavior theory of similarity and dynamic failure similar, the formula of dynamic parameters similitude ratio was got. This formula provides calculating methods using shaking table test to simulate earthquake induced landslide.
- Published
- 2013
45. Analysis of the Reliability of Soil Nailing Supporting Structure
- Author
-
Chen Yi Hui and Yan Peng Zhu
- Subjects
Engineering ,Safety factor ,business.industry ,Monte Carlo method ,Soil nailing ,General Medicine ,Structural engineering ,Slip (materials science) ,Stability coefficient ,Slice method ,Applied mathematics ,Limit state design ,business ,Analysis method - Abstract
Based on the limit equilibrium theory and the failure model of the soil nailing structure, used the circular slice method and the geometric relationship of circular sliding surface with the center of the circle to derive the stability coefficient formula. The most dangerous slip surface was searched by genetic algorithm. To establish the reliability analysis function through the stability coefficient formula. Finally, the reliability calculation of engineering examples, compared the results with the Monte Carlo method, the reliability analysis method was reasonable and valid.
- Published
- 2013
46. The Design of Portable Wireless Remote ECG Monitor System
- Author
-
Yan Peng and Zhi Gang Qin
- Subjects
Microprocessor ,Engineering ,Software portability ,business.industry ,law ,Detector ,Wireless ,Ecg monitor ,General Medicine ,Ecg signal ,business ,Computer hardware ,law.invention - Abstract
The paper designed a portable remote wireless ECG monitor system for daily health monitoring, which used a high-performance ARM11 microprocessor S3C6410 as the core. It can achieve a real-time display and remote monitoring of the ECG signal, with the advantages of portability, energy-saving, powerful function, security and stability. The detector is mainly for family, hospitals and community.
- Published
- 2013
47. Three Dimensional Path Planning of Autonomous Underwater Vehicles
- Author
-
Wei Qing Wu, Shao Rong Xie, Yan Peng, Jun Luo, and Mei Liu
- Subjects
Intervention AUV ,Engineering ,Underwater vehicle ,business.industry ,Control engineering ,General Medicine ,Motion planning ,Underwater ,business ,Control-Lyapunov function - Abstract
The path planning relates to the safe movement and navigation of the Autonomous Underwater Vehicles (AUV). This paper discusses the way of real-time path planning for autonomous underwater vehicle based on tracking control lyapunov function. The simulation conducted on H300 illustrates the effectiveness of proposed method.
- Published
- 2013
48. Water-Quality Assessment of Lv-Tang River in Zhanjiang, China
- Author
-
Guang Ping Ye, Xiao Jian Liang, Yan Peng Lin, Zhi Hong Li, Ya Yun Liu, and Rong Hao Wu
- Subjects
Pollution ,Pollutant ,Index (economics) ,media_common.quotation_subject ,Chemical oxygen demand ,Pollution index ,Environmental engineering ,Water environment ,Environmental science ,General Medicine ,Water quality ,China ,media_common - Abstract
Based on the water quality investigation data of December in 2010, the water environment quality of Lv-tang River in Zhanjiang national urban wetland park was assessed using single water quality parameter model and integrated water quality index model. The results show that the water quality of Lv-tang River is worse than the national quality standards for Grade V. The water is polluted seriously. The main pollutants are total nitrogen (TN), ammonia nitrogen (NH3-N) and chemical oxygen demand CODCr with their average concentrations of 60.49 mg/L, 30.57 mg/L and 227.38mg/L, respectively. The averages of their single parameter pollution index are 30.25 , 19.79 and 8.74. The average of single parameter pollution index of the river is 8.23 which indicated that the river belongs to heavy pollution zone. The integrated water quality index was 22.5 showing that the river belongs to serious pollution zone.
- Published
- 2013
49. Simulation of NO Formation in Hydrogen-Air Counterflow Diffusion Flame
- Author
-
Yan Peng Wang and Peiyong Wang
- Subjects
Waste management ,Hydrogen ,Diffusion flame ,chemistry.chemical_element ,General Medicine ,chemistry.chemical_compound ,chemistry ,Carbon dioxide ,Environmental science ,Diffusion (business) ,Greenhouse effect ,Technology innovation ,Nitrogen oxides ,No formation - Abstract
The combustion of hydrocarbon fuels produces large amounts of carbon dioxide. In order to cope with the challenge of greenhouse effect and global environmental protection. H2, as a cleaner and more energy-burning fuel, is being considered in many of the practical applications of combustion equipments. However, H2 fuel combustion will still produce pollutant NOx. Thus, the study of NOx emission is one of the most important topics in H2 combustion. With the classical counterflow burner, a numerical simulation of NO emission was carried out on the H2 diffusion flames. The stretch effects on flame temperature, NO concentration, and EINO are analyzed; the contribution of different NO generation routs are also quantified and analyzed. The major parameters influencing NO emission are flame temperature, radical concentration, and residence time, the observed relationship between stretch rate and NO emission is explained with the three major parameters.
- Published
- 2013
50. Numerical Analysis of Composite Soil Nailing Retaining Wall under Earthquake
- Author
-
Yan Peng Zhu, De Ju Meng, and Tian Zhong Ma
- Subjects
Engineering ,business.industry ,Soil nailing ,General Medicine ,Structural engineering ,Retaining wall ,Displacement (vector) ,Finite element method ,Seismic analysis ,Acceleration ,Slope stability ,Geotechnical engineering ,business ,Slipping - Abstract
The seismic response of slope supported by composite soil nailing is analyzed by using finite element software ADNIA, in which the EL-Centro wave is selected as input earthquake wave.The analytical contents include the displacement and acceleration of supporting slope, as well as the time history responses of the axial forces of anchors. In the establishment of finite element model, the interaction between soil body and supporting structure is considered. The elastic-plastic M-C model with nonlinear static and dynamic behavior is used to simulate the soil body, and the dual linear strengthen model is adopted to simulate the supporting structure, then the interaction between soil body and supporting structure is simulated with contact element. The results show that the composite soil nailing slope supporting structure has better seismic performance than the general soil nailing slope supporting structure. The maximum horizontal displacement of the latter occurs at the slope top, but that of the former occurs at the slope upper. Especially after the imposition of the prestress, the slope displacement under earthquake reduces significantly, and the axial forces of anchors under earthquake enlarge significantly. Moreover, the axial forces of anchors reach maximum values near the slipping surface. The displacement and the acceleration of slope increase along the slope height. The conclusions obtained provide basis for the seismic design of permanent supporting slope and reference for similar projects.
- Published
- 2013
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.