Abstract:Modeler and simulation modules in Ideas software are used to build the finite element models on involute gear and double involute gear with accurate tooth shape, and with the same design parameters and under the same loads, finite element contact analysis has been done. At last, the contact stress and bending stress on the two types gear transmission at the different meshing positions are solved out, and comparative analysis and study have been done. At the same time, that the ladder-shape tooth on the double involute gear how to influence contact stress and bending stress is emphatically analysed. All above offer the theoretical foundation that bring the double involute gear with ladder-shape tooth into the industry.

Abstract:Nonlinear characteristic of servo value is the important factor influencing hydraulic system, the model of electro-hydraulic servo pressure control system is designed. In this model, flux-equation of servo valve is specially applied and some non-linear characteristics are considered. Furthermore, SIMULINK toolbox of MATLAB language software is applied to solve mathematic model and simulation curves of some variables are obtained. The calculation results are in good agreement with the experimental results.

Abstract:Power train modeling brings a great deal of inconvenience to the research of vehicle for its complication and long period. Modeling and simulating with professional software can increase efficiency obviously. By introducing the functions and characteristics of CRUISE, a simulation model of manual transmission is built. This software is not only convenient, simple and universal, but also direct-viewing and easy to debugging. With this software, a large amount of time is saved and simulation results and modify parameters are analyzed expediently; therefore, system design can be achieved fleetly.

Abstract:The stability of the brake system is a key factor for the vehicle safety.It is important for the air braking system's stability to shorten the time lag between the front brake and the rear brake,the reasonable disposal of the air pipeline and the optimization of the braking system design.A test bench is developed to test the performance of the air braking system,which is mainly made of pressure sensors,signal amplifiers,data acquisition system,computer,pressing air resource and so on.Based on this test bench,the reaction time of the system while braking and abandoning brake can be measured.Using this test bench,the performances of the air braking system of a certain commercial vehicle is detected.Compared with the actual road test,it can save the cost and the time for experiment largely.

Abstract:The effect of damping on vibration is analyzed during the suspension deformation based on the 1/4 vehicle model. The Fuzzy logic control strategy for the semi-active suspension was proposed. By means of dissipating the energy of vibration and decreasing the peak value of the body acceleration via the action of damping, the parameter-self-adjust fuzzy controller was established. The united simulation of ADAMS and Matlab/Simulink were used for demonstrating the efficiency of the controller. Comparing with the practical passive suspension possessing the nonlinear character and the present fuzzy controller, the control system based on the new-style strategy provides better ride comfort and road handling.

Abstract:A multi-body simulation approximate model of a vehicle using ADAMS software is established, and a frontrear suspension system, a steering system, the tires and all connectors are studied. Vehicle handling stability under different tests is simulated. The result is credible and valid, the parameter of vehicle model is amended expediently. This simulation can help design products and reduce a development cycle.

Abstract:The author analyzs computational complexity of previous MPEG-4 video codec system in terms of data processing, memory accessing and address computation, and optimizs the performance of data processing and data transfer of MPEG-4 video coding and decoding algorithm. The architecture model of the real-time MPEG-4 video codec is proposed based on the analyses. This architecture can effectively utilize computational resource in software and improve the performance of MPEG-4 video codec system.

Abstract:With the development of Web application,virtual reality technology based on Web is popular.In Web3D field,the old standard of VRML(Virtual Reality Modeling Language)has many problems and is not fit for the development.So the Web3D Consortium provides a next generation standard for Web3DX3D(Extensible 3D specification).X3D,using multiple file encodings describing the same abstract model including XML,has a modular architecture allowing a range of levels of adoption and support for many different market types.It also has a unified application programming model and an expanded specification structure.The technology character of X3D is mainly analyzed.Also the background,development and supporting tools of X3D are introduced.And then an example of application using X3D is given.

Abstract:Recent years, there emerged many new types of 32-bit embedded system services. But due to the non-commonality of 32-bit embedded system, the designers of every system service should design particular boot software. The authors analyze the characteristic of 32-bit microprocessor S3C4510B , and the basic structure of embedded system and the characteristic of boot. The authors discuss the realization process of remap during the boot process and the management of abnormal vector in boot code. At last, they design boot program based on S3C4510B embedded system with good modularity and transplantablity. The test result shows good stability and effectivity of this design.

Abstract:随着网络游戏的迅猛发展,大型多人在线网络游戏(Massively Multiplayer Online Games, MMOG)对服务器的要求越来越高.通过对服务器集群和网络负载均衡算法的深入剖析,结合动态网络负载均衡算法--加权循环算法,给出了实现对大型多人在线网游环境下服务器集群的动态负载均衡算法.

Abstract:To detect circles fast and correctly has wide application prospect in the field of computer vision and automatic inspection. The conventional Hough transform has the limitation of using too much computation and memory space, and restricted extracting parameter. Aiming at this problem, the authors bring forward a new detection method in allusion to the real-time requirement of detecting circle in simple, image. When the image does not intersect each other, they transform the image into binary image and then perform edge detection to it. After that the chain code of the image is acquired. Basing on that, the circularity of the image and radius of the circle more quickly are calculated and a satisfactory result is gotten.

Abstract:In order to transmit high rate data and improve the spectrum efficiency, a new noncoherent Dual M-ary ance of the Dual M-ary orthogonal code Spread-spectrmn system is superior to the M-ary orthogonal Spread-spectrum, and it can resolve the conflict between the bandwidth and the gain more effectively.

Abstract:To counter the uncertainty of the processing time in the practical production process, this paper builds a single machine earliness/tarliness with fuzzy processing time. Optimum processing time is obtained and the minimum target function is got on the basis of taking penalty coefficients of the task, set-up time and value acquisition in the range of fuzzy processing time into consideration. The optimum processing sequence of the task is set by adopting the technique of simulated annealing and in the end in illustration of it a simulation case is put forward.

Abstract:Based on "Setting up and Evaluation on Index System of Aged Life of Quality in China" and with the more(item) need to be inputed and the inquiring and statistics changing frequently,this paper introduces how to use components of databases of Delphi to design and implement system of evaluation for aged life of quality.

Abstract:Genetic Algorithm is based on the biological mechanism of natural selection and heredity, leveraging colony searching technology, and is particularly applicable for the resolution of complicated non-linear problems intractable with traditional searching methods. Timetable problem is a multi-factor optimized decision problem and is typical problem in constitution and planning. It has been proved as a kind of NP-complete problem. According to the character of courses assignment in an university, a kind of codes and fitness function are designed and solved by Genetic Algorithm. With adaptive crossover and mutation probability employed, the experiment verifies that this method is both efficient and effective for the problem.

Abstract:Unified modeling language(UML) is an object-oriented(OO) modeling notation standard,which could be used in various developing environment and software life cycle.The authors discuss how to the use the UML to complete the use-case modeling,static modeling and dynamic modeling of the university student individual credit evaluation management information system.They believe that the UML can improve the documentation,visualization and standardization of the system and ensure a better reliability and reusability.

Abstract:It is very difficult to build the accurate mathematical model of the wind turbine generator system because of the uncertainty of air kinetics and the complexity of power electronics, especially when the wind speed changes abruptly or there is a disturbance. But the classical control needs the model. Using neural network controller to the wind turbine generator system can overcome these difficulties. The wind speed can be followed and the maximum power can be obtained under low wind speed by using the power coefficient curve BP neural network and the optimum pitch angle BP neural network. The maximum power can be kept and under the allowed range in the condition of high wind speed. The simulation model and result are given under the environment of MATLAB. The fluctuation of wind speed can be controlled and the disturbance can be cancelled by BP neural network controller.

Abstract:There is no universal method of finding the analytic solutions to transmission lines discribed by partial differential equations,so many researchers are studying and developing transmission line theories.Computing steady-state solutions of uniform transmission lines is one part of the study.The paper introduces another method of computing sinsoidal steady-state solutions of lossy uniform transmission lines.First,the complex expressions of voltage and current with zero initial state are obtained from the complex frequency-domain model of lossy uniform tansmission lines.The network functions,which are the ratios of voltage and current's image functions to the excitation's image function,can be found from the complex expressions.Sinusoidal steady-state solutions can be obtained by using the relation between network function and system's frequency characteristic.Finally,the method is demonstrated to be effective by an example.

Abstract:The main means of the voltage-reactive power control of substation are adjusting the taps of load-tap-changing transformer or the reasonable capacity of parallel compensating capacitors according to the operation condition of substation.The "nine-area control strategy" is widely used to adjust voltage in the stated range and reduce the transmission capability of reactive power for power system at present.By analyzing the existent shortages of nine-area control mode for voltage-reactive power,an adjusting voltage calculation method is put forward,input data of which are the real time data of current,voltage and power of the substation.Then operation decision of voltage-reactive power control method of substation is made.By the simulating analysis,predigesting method of upper system is built,based on which an applied real time calculating model and calculating steps is given.

Abstract:With the rapid development in logic circuit,the effect of transmission line in PCB becomes a confined factor.In the design of high-speed PCB,the factors which affect the integrity of signal can be found by computerized simulation of the transmission line,simultaneously the signal quality could be optimized.The capacitance matrices of transmission line in high-speed PCB have been computed with this method that is the total charge Green's functions with method of matrix,then the time-domain model is built.Connected to IBIS model of the I/O buffer these models can be used in computerized simulation of the transmission line.The result of simulation is equal with the result produced by EDA software-Specctraquest of cadence Co.and the efficiency of simulation is advanced.

Abstract:以Tween-80/正己醇/辛烷/水体系为研究对象,通过偏振光显微镜法测定相图,确定了该体系40 ℃时液晶区;用核磁共振氢谱法(2H NMR)验证了Tween-80/正己醇/辛烷/水体系40 ℃时层状液晶的区域;用小角度X射线衍射方法测定了层状液晶各种组分变化的层间距离;用自旋标记电子自旋共振法(ESR)测定了层状液晶分子排列的有序参数,研究表明:有序参数随着Tween-80含量的增加而增加,随着层状液晶中水含量的增加而减少.

Abstract:Mechanical Alloying(MA),as one of the high techniques on preparing alloy power,made it possible to alloy some materials which can not be realized with the traditional melting craft in the past.Meanwhile,the quasi-stable state and non-equilibrium state which are far from thermodynamic equilibrium and the synthesis of new materials can be realized.The technique of MA caused extensive concern in the material science field.With MA technique,the research in recent years on theory models and solid-state reactions were summarized.The applying progress of the MA technique in preparing materials such as dispersion strengthened alloy,intermetallics,function material and metastable materials(including non-crystal,pseudo crystal,supersaturated solid solution and nano-crystal) are detailed,and the development trend of the MA technique is prospected.

Abstract:This article analyzes what causes the lower main steam temperature of 1# boiler in the PZH-Steel Plant, then designs reconstructive project of spout of burning device which will be up and diameter of tangent round which will be decreased. At the same time, it is analyzed through numerical value stimulation and usual thermal calculation of boiler, and the result of calculation is used to reconstruct the actual boiler. The result of reconstructive run experiment shows that numerical value stimulation was correct, and attains anticipated object.

Abstract:This paper studies the electric potential of Solid Oxide Fuel Cell(SOFC).The activation over-potential,ohmic over-potential and concentration over-potential are solved by recently published equations.This paper also discusses the influence of operating temperature and steam to the SOFC's operating cell potential.Through the research,it is found that the temperature have great influence on SOFC's cell voltage.When the current density is high,the SOFC's cell voltage is higher with higher operating temperature.The steam ratio of the fuel have effects on SOFC's ideal electric potential and over-potentials.In summary,the less the steam ratio is,the greater the cell voltage we can achieve.

Abstract:Four techniques of dynamic mesh are Spring-based Smoothing, Dynamic Layering, Local Remeshing and the ALE method in the CFD transient simulation of engine. Based on those techniques, The authors analyze the improved measure of technique of dynamic mesh in the CFD transient analysis of the engine and propose the combined technique of dynamic mesh based on the finite volume method which is appropriate for. The CFD transient simulation of engine. At last, the 2D dynamic mesh method is applied to the typical pent-roof engine and the paper simulates the transient 3-D flow field at the tangent inlet of engine by applying the combined technique of dynamic mesh based on the finite volume method. The result of the simulation agrees well with experiment.

Abstract:采用"复变函数积分法",对γ光子与电子(反电子)相互作用的最小电磁耦合模型中的"γ光子单圈图传播子与链图传播子"(在动量重整化中的)"有限量"--由"大动量积分极限法"所计算导出的"一重积分"表达式,作了严格解析计算和极限ε(＞0)→0处理,获得了这个"有限量"的最终严格解析表达结果.同时,还对这种微小的"辐射修正"作了具体数值计算和相关讨论.

Abstract:Based on strong isomorphism for hypergraphs,vertex isomorphism is defined,which preserves hyper-adjacency property between vertices.Adjacency-matrixes of hypergraphs and weighted hypergraphs are presented respectively.The Floyd's algorithm is generalized to finding shortest paths between all pairs of vertices in a hypergraph.The publication provides an instance which verifies the practicability of the modified algorithm and whose results have been compared with those of the method given by LI Chun-ming.Time complexity of the presented algorithm is obtained to be(O(n~3)).

Abstract:A great number of experiments show that pearlitic steel with Layer Meso-structure depend greatly on its struc- ture. Its fatigue life is marked influenced by the interlamellar spacing. Based on the finite element analysis of single pearlitic colony with different interlamellar spacings, the reason of the interlamellar spacing is investigated, which plays an important role in the mechanics behavior of single pearlitic colony. It is necessary to establish the relationship between the microstructure and the mechanics behavior of the pearlitic material, and the importance of the interlamellar spacing is introduced into the constitutive equation of Single Pearlitic Colony.

Abstract:Water supply in small towns is one of the important components of the small towns' economy and society development.Based on the actual condition of water supply system,this paper analyzes the problems existed in water supply system of small towns,such as gradually polluted sources,imperfect water supply facilities,smaller scales,unreasonable quantity and so on.In addition,the corresponding measures are put forward to guarantee water supply system develop speed in small towns.Those countermeasures are launching sources protection work to guarantee the drinking water safety according to the character of the small town,then adopts reasonable water supply style,chooses economy water processing method,optimizes water network system construction;selects reasonable quantity consumption quota,and carries out gradually the regional water supply mode in conditional small towns.

Abstract:An analysis about development characteristics of Panluo iron ore mine landslide has been made, and main factors for landslide stability have been gained. According to these factors and development laws of the landslide, some reasonable control measures are put forward, the landslide has been controlled readically after these measures implemented.

Abstract:The authors definitely make out the concept of loop main pipeline, supplying main pipeline and ramiform branch line, as well as the order of their hydraulic calculation. Then they puts forward the principia of how to study out the direction of loop main pipeline and presents the method of making flux initial distribution. The matrix of loop main pipeline hydraulic square dispersion is set up. The node referenced pressure is defined and the equation of how to calculate it is deduced. A software is developed to calculate the loop main pipeline hydraulic square dispersion. The method of calculating ramiform branch margin impetus is given.

Abstract:The experiment study on influence of TGP regulation the peak flood to the navigational condition between Two Dams shows: The regulation peak has the characteristic with large discharge,widely discharge variation and water level fluctuant and so on.During the adjust peak,the velocity and slope during two dams are higher than low water evidently,and the influence on navigation is obvious.When the released discharge diurnal average is between 10 000 and 15 000 m~(3)/s,the navigation condition can meet the requirement of 10 000 T ship team,but when the discharge exceed 20 000 m~(3)/s,the velocity and slope at important bar between two dams are near or over the allowable value,the upward ship team sail difficultly.

Abstract:The methods of equivalent linearization of different energy dissipation devices are different in analyzing passive energy dissipation structure including different type of energy dissipation device by using of mode-superposition response spectrum method based on equivalent linearization, which results in the differences in computing accuracy and cost in dynamic analysis. For structures separately installed different energy dissipation devices, authors utilize relatively uncoupled mode-superposition method and complex mode-superposition method for contrast analysis, and probe into the suitability of the two methods in the dynamic analysis of passive energy dissipation structure. Numerical results show that complex mode-superposition method could be better for structure with viscous dampers in order to guarantee accuracy, and relatively uncoupled mode-superposition method is recommended for structure with viscoelastic, metallic or frictional ones.

Abstract:In reasonably modeling reinforced concrete structures with plane beam elements, the reinforcement and the concrete are regarded as different elements respectively, which would be joined together with the non-nodal connection method put forward under the principle of virtual work based on the displacement analysis at an arbitrary point in a plane beam element and according to the consistent condition of displacements. Then with that method, more problems of complex combination and connection can be conveniently and precisely simulated, such as reinforced members or members with changing sections in different construction phases. In the numeric crete beam and the strengthening effects on another reinforced concrete is verified and its convenience is demonstrated. examples, the displacement of a reinforced con- beam are analyzed, the feasibility of the method is verified and its convenience is demonstrated.

Abstract:The differential expressions of Arabidopsis thaliana seedlings under sound stimulation are studied primarily by applying mRNA reverse transcription differential display PCR(DDRT-PCR) with silver staining.To identify the truth of the differentially expressed cDNA fragments,Northern dot is performed.Among six differential expression gene fragments(SA3,SG2-1,SG2-2,SG7-1,SG7-2 and CA2) acquired,SA3,CA2 and SG7-1 are found to be positive fragments.SA3 is differentially expressed and SG7-1 is advantaged expressed,while CA2 is restrained by the sound wave.The(results) imply that plant has response to sound stimulation at gene level.

Abstract:The method of real option has already become an important tool in the fields of enterprises value evaluation, company finance, strategy investment management, investment decision, finance analysis, corporation merger and acquisition and so on. But there is a lot of problems in both theory and practical application for the method of real option. This article will analyze the research frontier problem of real option and indicate the further research direction.

Abstract:With the increasing contradiction of structure of industrial investment in Chongqing,this article has analyzed the relationship between its industrial investment and economic growth by the theory of grey system,discovering the mismatch between industrial structure and investment structure,the existing phenomenon of "off-manufacture" and the irrational investment structure in the three industry respectively.Then in order to develop the industry of Chongqing positively,it points out some countermeasures such as optimizing the investment between primary and secondary and tertiary industry and the investment in the above industry,strengthening investment in manufacture in Chongqing to avoid hollow of industry.

Abstract:Using non-parameter test and multinomial logit regression, this paper studies the dividend policy and behavior empirically. The results show that the change of the earnings of firms affects their dividend policy. When the EPS of the firms increase, the probability of choosing not to pay cash dividend is maximal, yet when the EPS of the firms decrease, many firms choose not to pay cash dividend or choose to increase DPS, so that the information that the relevant firms have great expectation is transmitted to the market. Furthermore, this paper also finds that the successiveness of the dividend policy of the listed firms in China is not good.

Abstract:This paper follows the Cointegration Test and Granger Causality Test based on the Vector Auto-regression Model to estimate the impacts of monetary channel and bank-lending channel on macro-economy respectively and investigates the different effects of the two channels on the latter using the OLS during the 1994 - 2002 sample period in which the monetary policy was transformed from being directly-controlled to being indirectly-controlled by the central bank in China. The result shows that the monetary channel and the bank-lending channel are both the important channels of Chinese monetary transmission, while the impact of latter on macro-economy is stronger. So the bank-lending channel plays a dominant role in the monetary transmission in China. Policy implications are made in the conclusion.

Abstract:In the era of Knowledge-based Economy,Intellectual Capital(IC)increasingly plays more important role in creation of vale.IC is gradually becoming the core resources for Architecture Design Enterprises(ADEs) to establish their sustainable competitive advantages.On basis of the previous research and practical investigation,the authors summarize and identify the IC's connotation of ADEs in China,analyze inner relevancy between IC and competitive (advantages) of ADEs from systemic angle of view,and carry out empirical study by statistically analyzing 168 ADEs in Zhejiang Province.The results show that there are significant positive relations between IC and competitive advantages of ADEs.