Search

New energy vehicles are becoming the future of auto industry and acquire considerable significance in many fields including energy conservation, CO2 emission reduction, environmental protection, oil dependence reduction, cultivation of new economic growth point, etc.. Based on international comparison and investigation to China’s two major auto industry bases----Changchun and Hubei, this paper discusses and analyzes, from economic point of view, the world new energy vehicle development and its experiences to China. Compares China’s new energy vehicle policies with relevant US policies. Analyzes the success of Belgian high tech and green plastic auto development. Illustrates, from consumers’ and companies’ view respectively, influence of China’s policies to the new energy vehicle development. Finally, summarizes the characteristics of China’s development, studies problems existing, and puts forward certain constructive suggestions.

The free-surface-pressurized-flow is a complicated water-air two phase flow in the spillway tunnel, which should be studied in the engineering practice. This flow pattern existed from open flow to pressure flow with the submerged depth increasing, which has obvious pulsing pressure. The flow transformation and pressure distributions were observed and studied in this paper.

The Android operating system is the most popular handheld devices operating system, the cloud computing is taken for processing large scale data efficiently, the commonly used scheduling technology of cloud computing needs to assign the user jobs to the reasonable resources for execution, the scheduling performance is not good. The mass data scheduling model is proposed based on application service quality limitation, and the cloud computing data scheduling principle is analyzed on the Android platform, the Android platform user requirements and the resources of node vectors are described, independent computing ability of users are ensured. On the basis of service quality parameters computing, cloud mass data scheduling tasks are matched to the tasks on the Android platform, the different service quality requirements of user can be accurately judged, the resources is provided to the user according to the requirement, the scheduling overhead is reduced after the service quality matching, the efficient scheduling of mass data is obtained. Simulation results show that the proposed scheduling model has better performance in time consumption and user satisfaction degree, the new model has lower CPU load ratio on the Android platform, it is a high efficient mass data scheduling model of cloud computing on the Android platform.

Temperature-responsive poly (N-isopropylacrylamide) (NIPAMn) was grafted onto porous silica (Sil-NIPAMn) to be used as stationary phase for normal-phase high performance liquid chromatography (NP-HPLC). Specific interaction ability and unique selectivity were detected between NIPAMn and polyaromatic hydrocarbons (PAHs) through monitoring the retention time with increasing the temperature in NP-HPLC process. The results showed that Sil-NIPAMn has better retention behaviors for structural isomers of PAHs when the temperature is above its lower critical solution temperature (LCST) in mixture of n-hexane/isopropanol. It indicates that NIPAMn grafted on the silica shows phase transition from random coil to stretch state to increase interaction between solutes and stationary phase when temperature is above its LCST.

Considering increasing importance of home service robot, the embedded control system based on TI msp430 and μC/OS-II is designed for window-cleaning robot. This paper includes three aspects, i.e., functions, hardware and software design. In the development of the system, the robot can be controlled by smart home system. PID controller is used to control DC motor stably. Meanwhile, a complete coverage path planning is proposed for efficiency.

A numerical simulation for heat exchanger with continuous helical baffles was carried out. The study focuses on the effects of helix angle on heat transfer characteristics. The results show that both the shell-side heat transfer coefficient and pressure drop decrease with the increase of the helix angle at certain mass flow rate. The latter decreases more quickly than the former. The tangential velocity distribution on shell-side cross section is more uniform with continuous helical baffles than with segmental baffles. The axial velocity at certain radial position decreases as the helix angle increases in the inner region near the central dummy tube, whereas it increases as the helix angle increases in the outer region near the shell. The heat exchange quantity distribution in tubes at different radial positions is more uniform at larger helix angel.

Vehicular flow in highway is inherently complex and development of microscopic models of vehicular flow has been a daunting task for researchers. This paper presents the use of Cellular automata (CA) micro simulation for modeling multi-lane traffic characteristics in highway, as well as considering the average speed difference (ASD) and lane-changing rules (LCR) in the CA model. Firstly, on the base of the Symmetric Two-Lane Cellular Automata (STCA) model, we analyzed the impact on traffic characteristics, through adjusting the maximum speed and lane-changing rules. Secondly, by the micro simulation, the relationships between speed and density in traffic flow were given considering the ASD and the LCR. The simulation results showed that, (a) the more obvious of speed dispersion, the more serious about speed declining, (b) the speed of overall traffic flow slowed down by 163% under extreme conditions, (c) the more reckless of lane-changing rule drivers used, the higher speed of traffic flow can reach.

The abandoned oil-based drilling fluid is a kind of water-in-oil system with high oil content, which has a significant recovery value. The effects of demulsifier dosage, heating temperature, ultrasonic time and centrifuge speed on the oil recycle were investigated in the chemical demulsification-ultrasonic treatment of oil-based drilling fluid. From the results of the experiment, BSF-L62 was a suitable reagent with the highest oil removal rate among the selected demulsifiers. The main influencing factors were optimized using the Response Surface Methodology based on Box-Behnken design. The oil removal rate was up to 76.9% under the optimal conditions of demulsifier dosage of 250 mg/L, heating temperature of 70 °C, ultrasonic time of 12.5 min and centrifuge speed of 7000 r/min.

A novel actinomycete, Streptomycessp. Dagang-2 was isolated from the oil contaminated soil, which has a high homology of 98.59% with Streptomycesmacrosporeus strain AM2-8. Purple pigment was purified from this strain, which showed a high chemical stability of acid-base, heat and light. Escherichia coli and Staphylococcus aureus were selected to evaluate the inhibition ability of purple pigment combined with microcalorimetric analysis and oxford cup method. The purple pigment showed a striking inhibition effect on Gram-positive bacteria S. aureus, however, it did not emerge an obvious antimicrobial activity against Gram-negative bacteria E. coli. It also could reflect the dynamic process of inhibiting effect to bacteria from purple pigment using microcarlorimetric technique. These results of this study might be useful for gaining more understanding of inhibition mechanisms from purple pigment.

Barium strontium titanate glass-ceramics with different La2O3 concentrations have been prepared by a melting-annealing technique. The effect of La2O3 concentration on phase evolution, microstructure and electrical properties of (Ba,Sr)TiO3-Al2O3-SiO2 glass-ceramics has been investigated. The X-ray diffraction results showed the volume fraction of the major perovskite (Ba,Sr)TiO3 crystalline phase increased with increasing La2O3 concentration. In addition, the scanning electron microscopy observations revealed that small amounts of La2O3 could accelerate the growth of crystals. When the La2O3 concentration was increased to 1.5 mol%, the microstructure of these samples displayed nonuniform distribution of the crystals. The dc conductivity measurements showed an increasing temperature dependence of conductivity with La2O3 doping at high temperature range above 400 °C. Impedance spectroscopy analysis indicated that the additive of La2O3 changed the major polarization mechanism to the relaxation polarization and the relaxation time for the La2O3 doped samples was much shorter than the undoped ones. The frequency dependence of dissipation factor curve displayed a peak at the range of 1 to 10 kHz due to the La2O3 addition. And the peak value decreased with increasing La2O3 concentration.

The effect of Zr/Sn ratio on the dielectric and energy storage properties of lanthanum modified lead zirconate stannate titanate (PLZST) ceramics with compositions located near the boundary between antiferroelectric and ferroelectric phases was studied. Microstructural observation indicated that all the samples had a uniform morphology with pure perovskite phase and the average grain size reduced obviously with increasing Zr/Sn ratio. As the Zr/Sn ratio increased, the dielectric constant increased and the transition temperature Tm shifted to higher temperature. All the PLZST ceramics exhibited double hysteresis loops. The maximum polarization increased, while the switching field decreased when the Zr/Sn ratio increased. The variations of Zr/Sn ratio had little impact on remanent polarization. As a result, both charged energy density and discharged energy density increased with increasing Zr/Sn ratio. A high energy storage density of 1.75 J/cm3 was achieved in the PLZST ceramics with the Zr/Sn ratio of 82.5/7.5 at 9 kV/mm.

With the application of the three-dimensional laser scanner, it makes possible that measure the shape and size of the sanding tree accurately. In this paper we put forward a new approach to reckon the volume of a single standing tree with three-dimensional laser scanner, explain the principle of the three-dimensional laser scanning system and how to establish the model of a single standing tree based on three-dimensional laser scanner and computer program. We have a test for a single standing tree volume with three-dimensional laser scanner, and also expatiate the specific process of reckoning the volume of a single standing tree with the model. As shown by the test, we can work out fast and exactly the single standing tree volume. If the approach can be apply on the measurement of stand volume, there has a great improvement in the precision and efficiency of measurement.

In the paper, combining the advantages of interface design of VB and secondary design of ANSYS, the electric calculating software for epoxy resin casting dry-type transformer was designed. In the procedure of designing transformer, designers only need to input the structure parameters and electrical parameters of the transformer, which would be transferred to ANSYS Parametric Design Language (APDL) program automatically. Then, the different loading conditions and post-procedure programs can be selected. Furthermore, VB calls ANSYS from the background program and reads the APDL file to calculate electric field distribution. Finally, the case analysis verifies that the software can establish the finite element model automatically and calculate the electrical field distribution under any fundamental frequency voltage and lighting surge.

It is significant to explore the fatigue contact damage of bi-layer ceramic composites in order to improve the long-time mechanical reliability of bi-layer structured dental restorations. In this study, Hertz contact test was used to compare the fracture modes and the ability of anti-fatigue damage of zirconia and alumina bi-layer composites, to analyze the effect of loading rate and other factors on the damage mechanisms of bi-layer ceramic composites. Cyclic spherical fatigue loading was put on the bi-layer alumina and zirconia composites with different substrates. The samples were observed by high depth of field stereomicroscope and digital optical microscope after test. The results showed that the fatigue contact damage mode of zirconia bi-layer composite was the porcelain fracture from radial cracks without the damage of zirconia core. The fatigue contact damage mode of alumina bi-layer composite was the alumina core failure from radial cracks as the function of contact load. For both of zirconia and alumina bi-layer samples, the number of cycles to the sample failure as the function of same maximum contact load with high loading rate was obviously smaller than low loading rate. The mechanical properties of the substrate materials had limited effects on the number of cycles to the failure of both zirconia and alumina bi-layer samples from contact-induced radial cracks as maximum contact load with low loading rate. The ability of the zirconia bi-layer composites to resist fatigue damage was much higher than that of the alumina bi-layer composites.

An unconventional inchworm stepping actuator based on bionics is presented, which consists of driving unit (PZT stack pump), fluid control unit (ER fluids valve), actuating mechanism (precision hydraulic cylinder). As a new type of precision force/ displacement driving and positioning system, it inherits the advantages of conventional inchworm actuators, and also has its own remarkable characteristics, such as that stepping displacement can be adjusted precisely through varying the working voltage and frequency, etc. The driving unit is actuated jointly by double PZT stacks; Multi-channel parallel cylindrical ER fluids valve is designed as the control valve. In the lab, the inchworm bionic stepping actuator based on PZT/ ER hybrid dive and control is designed and manufactured, and the related performances are testedsystematically. The maximum driving force reaches 49N, and the step size and driving speed VS the working voltage shows a good linear relationship under three different signal waveforms. At the same time, in the frequency range less than 40Hz, the driving speed VS the frequency approximately shows a linear relationship. When working voltage is 100V and rectangle wave signal inputs, the step size reaches 12.6μm. When the working voltage and frequency is 100V, 40Hz, respectively, the driving speed reaches 420μm/s. The maximum drive speed of test prototype reaches 1051 μm/s, when working in frequency 75 Hz. The systematic test shows that the method using PZT and ER hybrid drive and control technology to develop a new type of inchworm bionic stepping actuator is feasible, which provides a reference for the future development of new type of actuator.

This dissertation employs the method of direct current (DC) magnetron sputtering on the reverse side of the high power LED aluminum substrate to deposit the AlN thin film. And then, we paste the high power LED beads to the front of the substrate, testing and studying the heat dissipation influences of the AlN thin film on the high-power LED beads. In order to compare easily, some parts of the reverse of aluminum substrate should be overlaid thermally conductive silicone. The result indicates that depositing the AIN thin film or the overlay thermally conductive silicone on the back side of the aluminum substrate can improve the heat dissipation capability of high power LED, the AIN thin film especially.

Higher order local auto-correlation (HLAC) can be used to analyze the different types of complicated data by limiting orders and spatial displacements. In this paper, the basic concept of HLAC is introduced firstly. Then, we analyzed the HLAC based methods from three aspects: algorithm robustness, pattern improvement, and the changes of image functions which participate in the autocorrelation operation. Finally, the applications of HLAC-based methods are discussed.

China is a big agricultural country, which had many kinds of biomass resources. Biomass energy belongs to clean energy, it was available to achieve zero co2 emissions and substitute fossil fuels such as coal, oil and gas to be an important energy. Through the transformation of 35t/h coal-fired CFB boiler, which based on material and circulated carrier, burning biological energy, changed boiler from consuming one-time energy to the regenerative energy, which saved coal and prevented waste from directly emitting into the atmosphere to pollute the environment. It would save energy and increase the local farmers additional income by sell stem, which followed the trend of the national development strategy. The test data show that: this transformation of boiler is very successful, indicate that we can transform some original polluted boiler which consume coal to some degree and provide some experimental methods for these transformations.

The superfluous application and low use efficiency of chemical nitrate nitrogen fertilizer account for the nitrogen pollution of soil and water, threatening human’s health. In order to raise the fertilizer use efficiency, prevent from non- point pollution and nitrogen pollution of groundwater, and select superior material, five different kinds of super absorbent polymer (SAP) were selected as the objects. Through the analysis of the characteristics change of water and fertilizer absorbing of the five SAPs within different concentration of NO3--N, and the discussion of interactive effects between the SAPs and NO3--N, it is showed that: the water absorbent ability of all kinds of SAP exhibits a negative relationship with the concentration of KNO3 by decreasing of more than 50%. For all the five types of SAPs, the type of polyacrylate shows the strongest ability of water absorbing in all kinds of KNO3 concentration and the type of humic acid- polyacrylate is least affected by saline solution. The type of PAM- inorganic mineral SAP does well in nitrogen absorbing, whose absorbing amount linearly increases with the KNO3 concentration increasing, while the other types of SAP shows no obvious ability for nitrogen absorbing.

This paper puts forward that we can make glass fiber enhanced detaching-free template by using GRC composite materials, steel wire and other materials.In the construction,concrete beam and template form "Template /concrete" composite structure, which can make GRC template as a permanent structure bearing the stress together with concrete beam. Through the contrast test analysis and research of different treatments composite beams ,we can know the mechanical behavior and cooperative working performance of different composite beams.

This paper describes the monitoring design on the MES system about the carplant. The network structure and hardware are discussed in general. The system combines information management with supervisory control and works well.

In order to improve the oxidation resistance property of carbon/carbon composites, the C/C matrix was modified with a borate sol precursor and B4C micro-powders by a sol-gel integrating with a solvothermal process. The phase compositions, surface and cross-section microstructures of the C/C matrix modified by different B4C content were particularly investigated. Results show that the surface of the modified composites is covered by a coating composed of B2O3 and B4C, meanwhile, the internal micro-holes of the C/C composites are occupied by B2O3 and B4C. After oxidation in air at 973 K, the B2O3 glassy phase, due to the oxidation of B4C, seals the cracks and holes and effectively prevents C/C composites from oxidation. The weight loss of the modified C/C composites is only 2.21 % after oxidation in air at 973 K for 20 h.

Four types of heat sources of a dynamic lithium-ion battery (LIB) during charge were studied, and temperature distributions inside the dynamic LIB caused by the four kinds of heat generation sources with different currents and temperatures during charge were simulated by using a electrochemical-thermal three-dimensional model. The ohmic heat is the largest heat resource with about 63.5% in the total heat generation during regular charge, the electrochemical reaction heat is dominant when the SOC is below around 10%, and the subsidiary reaction heat can not be ignored when the temperature in the battery is above 80°C. Current as well as ambient temperature plays a very important role in the overall thermal behaviors of the battery.

A relative full-scale numerical simulation has been conducted on oscillating heat pipe(OHP) with single passageway(S-OHP)and double passageway(D-OHP). Mathematical model for studying the influence on the heat transfer performance of the number of passageway was built, including turbulence model, volume of fluid model, continue surface force model, and heat and mass transfer model caused by phase change, and all of which were based on the consideration of gas-liquid interface, wall adhesion angle, surface tension and process of phase change. Results showed that, on the one hand, strong coherence of the initial gas-liquid distribution, as well as the flow phenomena during boiling stage, were found between S-OHP and D-OHP, on the other hand, the heat-transfer capability of the D-OHP is slightly higher than the S-OHP.

This paper introduces a stressed member which is composited of GRC enhanced reinforcement template combined with post-pouring concrete structure. The GRC template is as a permanent template combining with concrete into a composite beam. The surface of the template is respectively dealed in different ways. Through contrasting the results of stress performance experiment with ordinary beam,studing the cooperative performance between GRC templates and post-pouring concrete, as well as the effect of bearing stress of composite beams with templates in different treatment ways. The optimal size is diameter 15mm, depth 5mm from the experiment.

The alien space meridians stair steel structure is first adopted in Taizhou medical city exhibition center project. Based on the finite element calculation method for curved beam element stiffness matrix, convergence standard controls and iteration method of solving the modification and optimization in this paper, the complex alien space meridians framed calculation model is built, and the distribution of axial force and bending moment distribution of the stairs meridians skeleton structure are calculated, and the position and numbers are determined. Numerical results show that the maximum space alien meridians stair axial force is 34.5 KN and maximum bending moment is 5.9 KN•m, which satisfy the standard requirement, then the size curvature big, mechanical transmission line complex and local internal force big technology problem skeleton structure have been solved .Therefore, a strong engineering application value achieves in this paper.

Transmission tower, being of evident nonlinear characteristic, is a complex space structure. Linear theory is generally adopted in the process of designing, which results in a waste of resource and disaster. Starting from the problems exiting in the process of transmission tower designing, the space beam element is adopted in the thesis, which reduces material nonlinearity through the rod end of the plastic method, and the geometric large deformation problem is involved by considering the amendment of the element stiffness matrix. Arc-length method of iterative computation is adopted as the solution method. On the premise of clarifying the process of dual non-linear solution, this thesis combines specific project example through self-organizing the finite element programming to calculate displacement - load curve, and the results show that the transmission tower structural system possesses obvious nonlinear characteristics. The research lays a foundation for improving the accuracy of space truss structure and developing the large specific finite element software.

Geological factors and engineering factors is a major factor to damage, the drivepipe deformation under pressure seismic load which used to establish mathematical model of the mechanical model can calculated the stress and strain analysis of the casing. The drivepipe damage to this article on the mechanism research on the mechanical model of drivepipe analysis under Seismic load, based on the drivepipe through the focus on the impact and stress damage to the mechanical method of drivepipe deformation studies, and the models of a drivepipe failure mechanism of the mechanical and mathematical are established, which will scientifically, accurately predict the damaged drivepipe.

Transmission tower security is the first requirement of intelligent power grid and exploring transmission tower line failure mechanism is a technical difficulty under the condition of cladding ice. The wind vibration model and relation between internal force distribution and cladding ice thickness of transmission tower system are researched in this paper.Numerical simulation results show that ice cover thickness increases with insulator string tension distribution changes, and nonlinear characteristics of cladding ice thickness and the distribution of stress transmission tower significantly increasing changes.The numerical results provides certain theoretical foundation for recognizing the failure mechanism of cladding ice transmission tower under complex load condition.

In post-modern context, conceptual buildings appear post-modern symptoms. What is its identity? What do modern and post-modern mean to architects? How do people concern structures? The fowllowing thesis are trying to solve all these questions.

Bi-layer all-ceramic dental crowns comprise an inner core made of alumina or zirconia and an outer porcelain shell. The veneer safe from damage is mainly depended on the properties of core materials due to the poor strength and toughness of porcelain. The fracture modes and crack transformation of zirconia/porcelain and alumina/porcelain bi-layer composites reveal the potential feasibilities of improving the fatigue life of all-ceramic restorations. The failure modes of bi-layer composites were confirmed under cyclic spherical fatigue loading by dynamic microcosmic observation. Crack modes and evolvement of bi-layered composites were explored inflecting with fatigue load, cycles, frequency and water environment. Microcosmic morphology of the samples was observed by high depth of field stereomicroscope to determine degree and modes of fatigue damage. The appearance of cone cracks of porcelain surface was almost consistent in both of zirconia and alumina bi-layer composites. However, the pattern and process of the damage are different under cycle fatigue load. Furthermore, process of fatigue damage of bi-layer composites were observed to failure rapidly under water environment in both of zirconia and alumina bi-layer composites.

Early 1980's MIDI technology coming into being, it has created condition for the development of modern music technology. From the MIDI, computer music, multimedia music to music computer and network teaching, it has already played an important role in music education concept and the reform of the teaching means. In the higher music college's teaching, the best solution to realize the music teaching means modernization development is the configuration and application of multimedia teaching systems. We have the analysis and introduction on the teaching system hardware and software configuration and their in music teaching, creation, scientific research and management application.

Computer MIDI and multimedia system in university music teaching application is still at the development phase. Combining with the teaching practice, the articles analyzes and studies some problems focused on computer and multimedia systems in university MIDI music theory in the teaching of practical application.

In allusion to insufficiency in teaching method of tradition “one-to-one” piano class, we lead to innovative means of "one-to-many" teaching method in digital piano lesson to resolve the issues, we analysis and research the issues in the development of digital piano collective classes, to look for a better and new piano teaching in universities.

In this paper, an improved Kalman filter algorithm was proposed by two kinds of anti-perturbation method which were derived according to the perturbation theorem of inverse matrix. Furthermore, direction-correcting has been merged into this algorithm by using multiple hypothesis testing theory which can detect the current direction of a target. Experiments which were based on indoor positioning have shown that the improved algorithm(named IKF) has great performance.

We performed first-principles calculations to the electronic structure and bonding characteristic of LaMgNi4H4. The calculation results show that the H—Ni units are formed by the covalent H—Ni bonds, the surrounding Mg and La atoms provide electrons to the H—Ni units, and the Ni-Ni bonds between the different H—Ni units are covalent, making the H—Ni units not isolated. These bonding characteristics show that LaMgNi4H4 is similar with interstitial metal hydride in some aspects, and similar with complex metal hydrides in other aspects, indicating LaMgNi4H4 is the intermediate between interstitial metal hydrides and complex metal hydrides.

On the whole, Information management of the trust industry does not keep pace with the development of trust business. This paper proposes an exploitation model of information management system for trust company and expounds the organizational structure of the system in detail. Furthermore, this paper discusses that information management can promote the management upgrade of trust company.