Search

In order to investigate the failure modes and damage mechanism of the concrete filled steel tubular latticed planar wind turbine tower with split spherical joints under earthquakes, the low cyclic loading tests were carried out on the two plane towers with web wall thickness as parameters, and their hysteresis curves and skeleton curves were analyzed. At the same time, it is verified via ABAQUS finite element simulation, and based on this analysis, the parameter expansion analysis of the web diameter ratio was carried out. The results indicate that the failure characteristics of the tower include three types: weld tear failure, web member buckling failure and web member high-strength bolt pull-out failure; to increase the thickness of the web member can make the hysteresis curve of the tower fuller and the energy dissipation capacity stronger effectively. The ultimate bearing capacity and ductility coefficient of the tower are positively correlated with the diameter ratio of web members. When the diameter ratio of web members was greater than 0.13, the increase in ultimate bearing capacity and ductility coefficient reduced obviously. In order to maximize the overall mechanical performance of the tower and improve the economy, in practical engineering applications, the diameter ratio of the web member of such towers should be taken as the range of 0.11~0.13.

Based on the theory of rural habitat, the concept of green pastoral residence is proposed, and the green pastoral residence is taken as the research object. Besides, based on the current situation of grassland ecological environment and pastoral living environment in Inner Mongolia, the green pastoral residence evaluation index system is established by using the hierarchical analysis method, and a fuzzy comprehensive evaluation model is constructed combined with fuzzy mathematical theory. Through case analysis, the evaluation results of the two modeling methods of analytic hierarchy method and fuzzy analytic hierarchy method are compared, and the applicability of the two modeling methods is analyzed, and a multi-level decision-making method more suitable for the evaluation of green pastoral residence is obtained.

Zirconia was proposed as an alternative material to titanium implant. Considering the condition of osseointegration and the stability of the implant, surface modifications of zirconia were attracting more and more attention. This study provides an overview of recent surface treatment technologies that have shown potential in augmenting the biological and osseointegration aspects of zirconia dental implants. These methods include non-thermal plasma treatment, laser texturing, TiO2 and hydroxyapatite coatings, carbon and nitrogen implantation, and the use of bioactive molecules. we concluded that the surface modification of zirconia can enhance the osseointegration effect by inducing surface roughness, increasing the surface energy and potential, and introducing functional units to the surface. Moreover, dimensional changes in nanoscalestructure are not invariably dominant in osseointegration of all surface modification methods.

Due to the influence of multiple DC commutation failure after AC failure and stable interaction of system frequency, voltage and power Angle, the operation control of power grid is greatly difficult. The control scenario of multi-feed DC commutation failure or system instability is constructed, the comprehensive control performance cost ratio index of emergency control measures to the safety of multi-turn DC commutation and system stability is proposed, and the search method of coordinated control strategy based on global optimal is developed to avoid the risk of chain failure caused by negative control effects. The evaluation of control search path and control target after joint optimization is realized, which is conducive to the construction of system-level defense method and improves the adaptability of strategy.

As big data and the Internet continue to advance, there is much space for new retail models to emerge. Luckin Coffee, one of the top brands in China’s coffee industry, has seen significant growth in both market share and brand recognition thanks in large part to its marketing approach. This study gathers a great deal of official data to understand the reasons behind Luckin Coffee’s rapid popularity in China. It then applies SWOT analysis to evaluate Luckin Coffee’s marketing approach. Luckin Coffee initially succeeded due to its rapid expansion and technological innovation but faced setbacks due to financial mishandling and excessive reliance on discounts. Fortunately, the company was rescued promptly and focused on developing its products. However, competition in the Chinese beverage industry is very fierce. The authors offer several recommendations for tweaks to the current marketing mix in the conclusion to aid Luckin Coffee in enhancing its core competency. It also knows the demand and market for coffee in China in recent years. To expand the product brand and produce more best-selling items, Luckin Coffee ought to use brand co-branding. Similarly, it is necessary for Luckin Coffee to developLuckin Coffee must develop localized products and establish its ecosystem. The suggestions might also serve as a source of inspiration for creating and growing a mid-range Chinese coffee company.

The issue of students’ subject bias has attracted widespread attention in high school teaching. Currently, researchers have conducted in-depth research on the reasons for students’ subject bias, but there is still little analysis from the perspective of student goal orientation. Therefore, this study adopts the inductive method to study the literature related to goal orientation theory, an analysis was conducted on the relationship between student goal orientation and subject bias based on various academic theories. Research finds that different environmental and psychological factors can affect students’ choices of internal and external driving forces, thereby affecting their goal choices, while tasks of different difficulty can also affect students’ tendency to avoid. Ultimately, students’ goal orientation choices will affect learning outcomes. In high school teaching, educators should pay attention to guiding students towards goal orientation, designing learning difficulties based on students’ learning abilities, in order to achieve good teaching results.

A large number of distributed power sources are injected to the distribution network, which can cause island operation in planned or unplanned situations. The islanded operation caused by the fault will cause the inverter to go off the grid in serious fault conditions such as short circuit between phases and disconnection. After the island is formed, if the common connection point before the island exchanges more power, a sudden change in the voltage within the island occurs. The frequency and phase angle changes of the voltage in the island are closely related to the characteristics of the inverter phase-locked loop, and the frequency mutation generally does not cause sudden changes in frequency due to a certain inertia of the phase-locked loop. Due to sudden changes in load power angle, input fault ride-through, etc., sudden changes in the phase angle of voltage in islands may occur. In order to solve the possible problems of power quality deterioration in islands, passive, active, and remote islanding detection schemes can be adopted, and the three schemes have their own advantages and disadvantages. In actual operation, it is necessary to consider the cooperation relationship between island detection, protection, safe automatic control and fault ride through.

The key of this paper is to extract several representative characteristic indicators and establish the ecosystem characteristic index system of Saihanba by collecting and preprocessing the data in Saihanba area for a comprehensive evaluation. A gray correlation model was used to calculate the correlation degree and rank the cities based on the characteristic indicators, with Beijing as the central point and extended to Xinjiang, Japan and other regions. Through the integration of the data from the official website and books, the data of the representative ecological aspects of the Saihanba was obtained and divided into 12 characteristic indicators to build the characteristic indicator system of the Saihanba ecological environment, and the maximum characteristic value and CR value were solved by using the hierarchical analysis method to assign values to the indicators and obtain the weight vector of each indicator. Based on the principal component analysis, the correlation matrix between the indicators was established to determine the importance of the factors, and finally, a comprehensive comparison and analysis of the changes in environmental conditions before and after the restoration of the Saihanba was performed. Based on the multivariate nonlinear regression fitting bias and optimization and TOPSIS comprehensive evaluation method to assess the importance of the indicators, it can be concluded that Saihanba played an important role in the fight against sandstorms in Beijing; through the evaluation model, the in-depth analysis of environmental indicators in Xinjiang region and Japan, the impact of the ecological model on environmental conditions in different regions was derived, which has positive implications for the promotion of similar ecological reserves.

Recently, the excellent anti-pollution performance of superhydrophilic membrane has attracted much attention in the field of wastewater treatment and oil-water separationIn. At present, the widely used commercial membrane materials have good pore structure and mechanical properties, but most of the commercial membranes are hydrophobic, so a simple, environmentally friendly and universal method is urgently needed to change its hydrophobic membrane to superhydrophilic membrane. In this paper, tannic acid (TA, natural plant polyphenols) and polydopamine (PDA) were used to build an anti-stain coating. The synthesized hydrophilic polymer containing polyphenols crosslinks with the base layer through hydrogen bonding, π-π and Michael addition. After the modified PVDF membrane is moistened by water, the superhydrophilic polymer network on the surface binds the water to form a stable hydration layer, showing the superhydrophilic/underwater superhydrophobic properties. The wettability of the modified film in air and water was investigated. The contact Angle of the modified separation membrane prepared in this paper is more than 150°, and the separation efficiency exceeded 98%. The good flux and efficiency can be maintained after 5 cycles, and it is found that the membrane has a certain anti-protein adsorption capacity. The modified membrane has high separation flux and excellent reuse, and has great uses in other ways.

In recent years, there have been frequent offshore oil spills, and the discharge of industrial oily wastewater has not been properly solved, seriously affecting biological and water quality, and people's requirements for water quality are getting higher and higher, so it has become increasingly urgent to find green and efficient technologies and methods for separating oil-water mixtures. In this work, glutaraldehyde, a widely used crosslinker, is used to graft natural polysaccharide chitosan onto PVDF membrane, which greatly enhances the hydrophilicity of PVDF membrane, and the superhydrophilic superoleophobic CG-PVDF membrane prepared can be used to treat oily wastewater. The materials for preparing membranes are inexpensive, easy to obtain, and environmentally friendly, recyclable, and will not cause secondary pollution. Therefore, this green and simple membrane separation method for the treatment of oily wastewater is of great significance in sustainable development.

Oily sewage is widespread in petrochemical and machinery manufacturing industries. Direct discharge not only wastes water and oil resources, pollutes the ecological environment, but also affects the survival and health of humans and other organisms. The traditional oil-water separation method has strong limitations, poor economy and low separation efficiency. Sodium alginate (SA) and polyvinyl alcohol (PVA) were uniformly coated on the surface of PVDF membrane, and superhydrophilic SA-PVA@PVDF hybrid membrane was prepared by multiple cyclic self-assembly. The oil-water separation experiment was carried out by using the membrane. The initial separation efficiency was 99.8%, and the overall separation efficiency remained above 98.3% after 10 cycles of regeneration experiments. This study provides a new idea for the low-cost, green and simple preparation of superhydrophilic-underwater superoleophobic separation materials.

Currently, freshwater scarcity is becoming an increasingly pressing issue worldwide. Solar desalination technology is recognized as a promising solution to this problem. However, the existing seawater desalination evaporators suffer from slow evaporation rates and limited salt tolerance. To address this, we developed a lignocellulosic hydrogel sponge (LHS) using a straightforward salting-out method. This hydrogel sponge achieves a high evaporation efficiency of 2.57 kg·m−2·h−1 and exhibits excellent salt, acid, and alkali resistance. Therefore, LHS presents a new approach for solar-driven water purification, which holds significant implications for solving freshwater scarcity.

With the high penetration of renewable power in the power system, the inertia level and frequency regulation capability are reduced, the system frequency safety are facing a major challenge. Considering the different frequency support capability of the synchronous generators, the effect of adjustment coefficient of different units on the minimum frequency has been analyzed based on the sensitivity analysis. A multiobjective frequency constraint unit commitment model considering the sensitivity of adjustment coefficient is proposed, and simulation results show that the proposed model increases the minimum frequency value, improves the frequency stability of the power system.

SM gas field is a typical tight sandstone gas reservoir, which adopts the production mode of downhole throttling and inter-well series connection. Gas wells will have different production characteristics at different stages of production, which will cause the management measures implemented by gas wells in different stages to have different effects on efficiency[1-2]. Based on the complex production law of water-producing gas wells in SM Gas Field, this paper is based on the quantitative evaluation of the impact of water production on gas well development indicators for the latter. Clarify the reasons for the production of water and water from gas wells, understand the production rules of water-producing gas wells, optimize the management measures of water-producing gas wells in SM Gas Field, and clarify the rational production allocation methods and work under various complex water-producing conditions during the development of water-producing gas wells system[3]. It can also lay a foundation for the subsequent development of low-yield and low-efficiency wells to tap potential measures, to propose technical countermeasures to enhance oil recovery in the SM gas field, and to carry out gas field-related stable production potential evaluation.

Special equipment is often accompanied by the phenomenon of high temperature and high pressure in operation, and it needs to be measured. With the deepening of research engineering application, some new problems appear, such as how to accurately measure and control the combustion temperature field in the hydrocarbon energy system, carry out combustion diagnosis, control the combustion temperature, minimize the generation of pollutants, put forward higher requirements for measurement technology. High temperature has a core impact on equipment safety, which is a key index that must be considered in design and material selection. Near the surface of these high-temperature objects, there are usually high-temperature translucent media and particles produced by combustion, which have a great impact on radiation temperature measurement. At the same time, with the change of temperature and concentration, these translucent media often have gradient refractive index change, which has a certain impact on radiation temperature measurement. These shielding objects interfere with radiation and affect the accuracy of measurement. This topic mainly focuses on the theoretical and experimental research of this kind of problem. The inversion algorithm of wall temperature reconstruction under the shielding condition of dispersed medium is proposed. Under the condition of introducing different measurement errors, the algorithm is verified, and the corresponding numerical simulation is carried out to verify the feasibility of the algorithm model.

A swivel cable-stayed bridge over the existing railway is a span across the existing railway. The recommended scheme for the main bridge is (128 + 388 + 128) m steel mixed composite beam swivel diagonal pull bridge with span. The cables of the diagonal pull bridge are arranged according to the fanshaped central double cable plane, taking into account the mechanical performance and aesthetics. The bridge structure adopts semi floating system. The concrete swivel diagonal pull bridge is adopted in the comparison scheme. The design of the bridge is three spans and (138 + 268 + 138) m prestressed concrete box girder is adopted. The cables are arranged according to the central double cable plane, and the bridge composition adopts the consolidation system. Considering the needs of bridge operation and maintenance in the later stage of the bridge, when the dead weight of concrete diagonal pull bridge is within the ideal range, the concrete swivel diagonal pull bridge can be preferred. In order to calculate the dead weight of the selected bridge, the author uses the finite element software to model the whole bridge and calculate the weight of the bridge. The results show that the dead weight of the concrete swivel diagonal pull bridge is too large, which has exceeded the maximum bearing capacity of the existing spherical hinge. In order to continue to use the concrete swivel diagonal pull bridge scheme, it is necessary to optimize the design of the concrete swivel diagonal pull bridge scheme.

In order to study the influence of prestress on cantilever deflection and construction linear control of continuous rigid frame bridge in construction stage, this paper introduces the significance of continuous rigid frame bridge’s linear control, the calculation principle and deflection influence analysis of vertical formwork elevation in cantilever construction. According to a specific continuous rigid frame bridge, this paper use the finite element software to simulate and calculate the deflection of prestress to the cantilever construction of continuous rigid frame bridge. The influence of friction coefficient between prestressed steel bundle and bellows and prestress loss on cantilever deflection and construction line control of continuous rigid frame bridge is also analyzed, furtherly brings out the solution to deal with the problems due to the change of prestress.

The greenhouse gas emissions of ports mainly come from the combustion of fossil fuels produced in the loading and unloading production. With the continuous advancement of port equipment electrification, non road mobile machinery has gradually become the main source of fossil fuel emissions. On the basis of the existing voluntary emission reduction methodology, this paper puts forward the greenhouse gas voluntary emission reduction methodology of port non road mobile machinery hybrid power transformation project, and verifies the correctness of the methodology through examples. In the future, it can be used as the accounting method of trading volume in voluntary carbon emission trading, and effectively promote the energy conservation and emission reduction of port industry and green port construction.

Green ports are sustainable ports that achieve a good balance between environmental protection and economic benefits. With the deepening of the green port construction work, in order to study the green port evaluation system, through a large number of port field research, based on the actual situation of Port in China, the “Green Port Grade Evaluation Standard” (JTS/T105-4-2013) was revised, by means of weight assignment for different types of wharfs, the evaluation system at the level of port group is established to solve the limitation that the original standard can only evaluate specialized wharfs, and to realize the evaluation of large port groups with multiple wharfs. Finally, based on the above evaluation system, a port group is selected to evaluate and verify the integrity and correctness of the evaluation system.

In this paper, the simulation analysis on partial discharge (PD) signals produced by multiple insulation defects in gas insulated substation (GIS) has been researched by the simulation software of electromagnetic field (XFDTD). The theoretical analysis and simulation results show that the single partial discharge signal is the linear convolution of the partial discharge current signal and its corresponding impact response in GIS. The mixed partial discharge signals are the linear mixtures of every partial discharge signal.

In this thesis, the numerical models of multi-stages excavation foundation pit with h-shaped double row piles as the retaining structure were built by finite element software PLAXIS 3D with HS small model as the constitutive equation for soil layers, then the numerical models for two different pile layout methods, parallel layout and staggered layout, were calculated, calculation results were compared. The numerical calculation result shows that back row piles stand most load, so they need to be strengthened during the design and construction process; the bending moment of back row piles at the position connecting with beam is the largest, which need to be strengthened; the h-shaped double row piles with staggered layout method is better than the parallel way, which could be used to improve the safety of engineering, as well as achieving economic rationality.

The increase in demand for fuel oil has brought higher challenges to the high value-added process of heavy oil vacuum residue, especially for delayed coking units. For optimization of product distribution, the effects of reaction temperature and chemical additives were discussed. The results show that high temperature and 1 wt% of the heteropoly acid (HPA) could increase the light oil yield in the experimental delayed coking simulation device.

As a kind of VTOL technology, ducted fan is not only used by many kinds of aircrafts, but also one of the trends of the future aircraft lift system, and attracts more and more attention. For an engine driven ducted fan lift unit, involving the engine and ducted fan matching problem, the form of transmission and transmission ratio are the key design parameters. In order to design and develop a ducted fan aircraft reasonably, a thrust test platform was set up to connect the engine with the ducted fan through the belt driving. The matching relationship between the engine and the transmission system was experimentally studied and the optimal transmission ratio was determined. The results showed that the optimal transmission ratio for the engine 1 is 2.2:1, and for the engine 2, the optimal transmission ratio should be 2.95:1 based on the current ducted and movable blade aerofoil design. At this time, the lift will exceed 130 kg•f, meeting the aircraft's original design requirements.

Transportation is one of the main sources of carbon emission, and it is also an important area for reducing greenhouse gas emission and alleviating climate change. Tianjin port is the largest artificial port in China, and it is also an important port in China. The construction of green port can effectively control the energy consumption and pollutant discharge of the port. From five aspects of improving management ways, strengthening propaganda and training, clean energy utilization, technological transformation and environmental protection, this paper puts forward relevant measures for Tianjin port to build green ports, so as to effectively guide Tianjin port to carry out the construction of green ports.

In order to facilitate the active identification capability of various types of electrical equipment, so as to enhance the functions such as the behavioural analysis and optimization control of electricity utilization in an automatic demand side management (DSM) system. A definition is given on load fingerprint based on operating characteristics of household appliances, as well as its architecture. In addition, based on the cyber-physical systems (CPS) technology, a hierarchical technical framework for load fingerprint management is proposed. This framework is a two-layer electricity utilization load fingerprint management platform, including local management and cloud-based management. Finally, two hardware prototypes are developed, including a socket-type smart collection terminal and an intelligent interactive concentrator with multiple communication technologies, which can provide strong hardware support for the realization of the hierarchical technical framework proposed in this paper.

The Ce1-xYxO2-x/2 samples were synthesized with different doping amount by solid state reaction method. Phase structures of the samples were analyzed and characterized by XRD. The effects of different doping amount on infrared emissivity properties at 3-5µm wavebands were investigated systematically. It is found that the powder with doping molality of x=0.2 exhibits the lowest infrared emissivity value ca. 0.21 when the test temperature is 600 °C. The mechanism for the low infrared emissivity is explored thoroughly. The reduction of infrared emissivity with increasing temperature is ascribed to the enhancement of electrical conductivity. Our results suggest that Ce1-xYxO2-x/2 powder with x=0.2 is a potential candidate for stealth material of aircraft engines.

The Stress concentration factor (SCF) induced by the machined surface is more complex than that resulting from macro-geometry discontinuities and has great effect on fatigue life of structure. However, another important parameter, stress gradient (SG), was always ignored. The notch roots or valleys of the wave surface constitute fatigue hot points, where cracks occur, so it is essential to study the SCF and SG at valleys rather than just the root-mean-square SCF variable. In this work, a new method for evaluating the influences of surface topography on fatigue propriety of the random machined surfaces was given. An analytical method using Fourier transformation to simulate machined surface topography is presented. Analytical formulae for SCF and SG for random machined surfaces are derived subjected to a general loading and validate these formulae via finite element method (FEM). Joint probability-distribution function for SCF and SG at the valleys of the random machined-surface topography of the machined sample was obtained after different cycles fatigue test. This method gave us how the surface topography effect the fatigue properties of machined components. Fatigue test of machined sample for a single crystal nickel based alloy were established for validated this method. The obtained results should be useful in studying and evaluating fatigue properties of machined components.

In order to solve the problems that test data of the drug control institution is not standardized and low quality, the data exchange and information sharing are realized, the data value is mined and the information level is improved. Method: combined with the business of control institution and information practice, refer to the practice of relevant standard development; carry out the research on standard development work from the content, principle and process. Result and conclusion: this research completes development of the local standard of Guangdong drug test data, which can provide reference for the development of similar standards in future.

The project design is the foundation of training, which can insure the usefulness of human resource development system. The Training Project Maintenance Simulate System of NC Machine Tools is presented based on analyzed contradiction between supply and demand. This paper introduces several scheme of Maintenance Simulate System of NC Machine Tools.

This paper presents the fabrication technologies related to flexible titanium-dioxide (TiO2) working electrodes and graphite counter electrodes on plastic substrates for dye-sensitized solar cells (DSSCs). The DSSC on a plastic substrate had a sandwich structure consisting of a TiO2 working electrode, an electrolyte, and a graphite counter electrode. Nano-crystalline TiO2 powder, titanium (IV) bis (ammonium lactato) dihydroxide (TALH), de-ionized water (DI water), and Triton X-100 were added to the mixture of PDMS base and curing agents to form TiO2 colloids for the TiO2 working electrode. The material analysis of the TiO2 working electrode and the graphite counter electrode employed field-emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and X-ray diffraction (XRD). Nano-crystalline TiO2 powder was used to form the TiO2 working electrode. The surface characteristics of the TiO2 and graphite films were investigated herein. The low-cost fabrication technologies of the TiO2 working electrode and graphite counter electrode on the plastic substrate were clearly demonstrated.

It is recognized at home and abroad that Cordyceps militaris is a fungus that can be edible and used for medicinal application, and also a common cordyceps taishanensis that is widely distributed and with very high medicinal value in China. Active Cordyceps militaris polypeptide has shown several highlights in its absorption mechanism, such as directly absorbed without the need for digestion, and absorbed quickly and completely, and more and more international researchers are attaching great importance to it. Physiological and pharmacological activities of Cordyceps militaris polypeptide are mainly to activate related enzyme systems, promote intermediary metabolisms or control the DNA transcription and translation, simultaneously activate the reticuloendothelial system and macrophage, promote the transformation of lymphocytes, and as a nonspecific immune enhancer and regulator, activate the immune competent cells, especially lymphocytes, lymphokines, mononuclear macrophage system and NK cells, thereby attacking the target cells to play an antitumor role, and also exerting its anti-aging, anticoagulant, hypolipidemic to enhance the immunity, improve the liver function and delay the aging. In this paper, the immunity improvement, anticancer, antioxidation and antimicrobial activities of active polypeptides from Cordyceps militaris are reviewed, in order to provide a solid theoretical help for the further development and application of active polypeptides of Cordyceps militaris.

Ordered 2D hexagonal and parallel arranged pore channel mesoporous silica materials with homogeneous size and spherical shape have been synthesized by using amino acid-based surfactant templating, their ordered mesostructures were characterized by infrared spectroscopy, X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen sorption analysis.

The construction of Tibetan corpus is the field of Tibetan information processing of basic work. This paper uses the technology of web crawler and pretreatment and real-time acquisition of web sites to obtain a large number of Tibetan corpus in short time. The hot words reflected the hotspot of Tibetan people’s attention in a certain period of time. The paper draws lessons from the TFIDF for Tibetan text information extraction and the words of different locations are given different weights to extract the hot words. It is really effective to realize the construction of the raw Tibetan corpus and the extraction of the hot-words by self-made software.

Nowadays Industrial Control System (ICS) is becoming more and more important in significant fields. However, the using of the general facilities in these systems makes lots of security issues exposed. Because there are a number of differences between the original IT systems and ICSs. At the same time, the traditional vulnerability scan technology lacks the ability to recognize the interactions between vulnerabilities in the network. ICSs are always in a high risk state. So, this paper focuses on the vertex polymerization of the topological vulnerability analysis. We realized a topological analysis method oriented ICSs on the basis of achievements at home and abroad. The result shows that this method can solve the problem of the complex fragility correlation among industrial control networks.

This paper studied the content of water glass before and after adding modifying agent by TMS-GC method, it was found that different modulus of water glass led to decrease of silicate content at different levels after a period of storage, and the modifying agent could retard the aging of water glass. It has remarkable significance on the theory and practical application of water glass chemistry.

Feature extraction is a crucial step for face recognition. In this paper, based on supervised local structure and diversity projection (SLSDP), a new feature extraction method called orthogonal discriminant diversity and similarity preserving projection (ODDSPP) is proposed for face recognition. ODDSPP defines two parameterless weighted matrices by taking into account the class label information and local structure. Thus ODDSPP could utilize both the diversity and similarity information of the data simultaneously for dimensionality reduction. Moreover, the proposed algorithm is able to extract the orthogonal discriminant vectors in the feature space and does not suffer from the small sample size problem, which is desirable for many pattern analysis applications. Experimental results on the ORL and AR databases show the effectiveness of the proposed method.

In this paper, the fracture analysis of the planet support, which was made of aluminium alloy and used in an electric actuator, was investigated. The laboratory analysis was conducted to find out whether there are defects generated during manufacturing process. Besides, the finite element analysis was carried out to calculate the maximum tensile stress and compared it with the material strength. The mechanism of the fracture was found to be low-cycle fatigue.

The target of technologies on tracking Tibetan-based network public opinion topics is to track the development of some known topics. By tracking these topics could help people to grasp the trend of public opinion. This research area becomes more and more important on Natural Language Processing domain and how to apply these state-of-the-art computer science technologies on the study of national language has drawn lots of awareness to related researchers. This article will introduce some features about Tibetan language and its grammar. Some technologies about categorizing Tibetan text and tracking Tibetan-based network public opinion will also be talked about.

Molten slags of blast furnace is a second resources with great value of 1600~1 800 MJ sensible heat per ton. At present, water-quenching process plays a leading role in recovering waste heat of the molten slags. However, this method not only cost lots of water, but also recover little sensible heat and can pollute the surrounding environment. Dry granulation process, as an environmentally friendly method with high-efficiency heat recovery, have attracted widespread attentions. In this paper, the water quenching and dry granulation processes were discussed in detail. After a thorough comparative analysis of various treatment technologies, it can be concluded that centrifugal granulation affiliated with dry granulation is the optimum process, with smaller slag particle size (about 2mm), more glassy phase and higher recovery rate.

It is established the ram biomass straw machine as the analysis object in this paper,the molding machine cones of stress in the forming process of the analysis of the system. We used pottery instead of Wear-resistant cast iron for improving the performance of forming sleeve. The structure of the forming sleeve was analyzed with the mechanical module of a soft named Pro/engineer in this paper. The result indicated that the program was feasible. With the sensitivity analysis we identified the suitable angle for the sleeve.