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Based on the background of battery charging system, in this paper, the small-signal equivalent circuit model of phase-shifted full-bridge ZVS DC/DC converter is established, then its transfer function is derived, and a single closed-loop voltage-mode controller is designed. In order to analyze anti-grid voltage disturbance capacity, transfer function of audio susceptibility is presented, and the anti-grid...
The labor market is always been closely linked with macroeconomic development. This paper has an in-depth analysis of the current labor market situation under financial crisis, and also shows the global financial crisis' influences on our labor market and enterprises' human resource management. Besides, in this paper, there are also countermeasures and suggestions on how to regulate the labor market...
The simple genetic algorithm is introduced at first. On the basis of many strategies to selector operator, crossover operator and mutation operator, the advanced genetic algorithm sufficiently considers the global optimum by generating new individuals in each generation, which guarantees the population's multiplicity and accelerates the evolved speed. The optimal design of permanent magnet generator...
Artificial neural network is an important research direction in data mining. It is used to solve classification and regression problems, and can find out the nonlinear relation between the input attribute and the output attribute, especially the smooth and continuous nonlinear relations. Use the Microsoft neural network to find out how the meteorological factors influence the precipitation, and to...
When disturbance process of periodic signal occurs, Nonlinearity system produce bifurcation behavior which new frequency spectrum derives from every time. After infinite bifurcations , System turns into chaotic status and frequency spectrum become abundant [1]. The paper analysis the frequency spectrum of the Nonlinearity system and present application design method of chaotic Masking Encrypt technique...
A critical problem facing the mechanical design community is that of bridging the gap between mechanical CAD data and finite element models.In this paper, We developed a 2D finite element analysis (FEA) data creating system in which the data is generated from DXF (drawing interchange file) data, which is one of the most famous CAD data. The system is proposed and the usefulness of the system is clarified...
For the rich indium material GaInN ternary alloys, the manufacturing technology has become mature, but there is still larger space for the research on the modeling of their physical characteristic. Among the material band gap that emitting wavelength directly related to and their corresponding bending coefficient (bowing parameter), the lattice constant, bond lengths, and components, there are small...
On how to use natural gas in a highly efficient and rational way in heating, this dissertation proposed a dual-source heating system with gas internal-combustion engine as thermal power equipment and set up a mathematics model of economic evaluation criterion for this system. Applying to concrete cases, the authors analyze the environment temperature t, the COP (coefficient of performance) of heat...
In order to measure refrigerator practical capacity, this paper presents a system of measuring refrigerator practical capacity based on multi-sensor data fusion. In the system, the data of pressure, temperature and humidity comes from a group of pressure, temperature and humidity sensors. Then, after data fusion, it gives an accurate description of the environment. Based on the data, the system controls...
Based on Chinese reality, we must continue to promote technological innovation and enterprise culture construction of a common mechanism. Enterprise Culture is a unique cultural management with the core of value, power source of technology innovation. Enterprise Culture provides a power source for technology innovation and it is the foundation to guarantee the performance of enterprise technological...
As public goods, hospital materials lack internal cost pressure and external efficiency motive, so there are many problems in the supply system of hospital materials - the sluggish prediction of medical material demand as well as the patient-oriented response plan, ineffective information communication and coordination between supply and demand of materials, inadequate standardization of management...
How to keep local features of the mesh and adaptive subdivision becomes the research hotspot. Therefore, this paper proposes an adaptive subdivision algorithm with mesh segmentation. This algorithm puts forward a new method of the initial segmentation based on the mesh analyses of the regional growth. And on the basis of the Loop subdivision, the paper gives an adaptive subdivision that can effectively...
In this paper, we give an introduction to Chinese standard Universal Transport Interface (UTI) for digital television receiving devices. UTI standard, with independent intellectual property rights, is based on the high speed USB2.0 physical interface. It has two logical interfaces: TS interface and command interface. It aims not only to support the conditional access (CA) service, but also to support...
The downhole positive displacement motor (PDM) plays a very important role in petroleum drilling engineering. The rotor-stator coupling is the key element in PDMs. Normally both the rotor and the stator are constituted of cylindrical helix surfaces. 3-axis and 4-axis NC milling machines are usually used to machine these helix surfaces. The current CNC milling technology for manufacturing large and...
The 1000 kV alternating current(AC) power transmission project from Southeast Shanxi via Nanyang to Jingmen is the first ultra high voltag(UHV)project in China,and is the first long-running UHV with rated voltage in the world.In order to achieve the icing on-line monitoring on this 1000 kV UHV transmission lines, this paper summarized the current situation and drawbacks of the icing on-line monitoring...
The platform of teaching resources which is in the form of the network course has combined the course website construction and teaching resources construction together. It has avoided the duplication of the resources construction and satisfied the need of the course website construction and teaching resources construction and has made up for each other's deficiencies. With the turning point of the...
The finite element method (FEM) is presented in this paper to research the noise of axial flux surface mounted permanent magnet synchronous machine (AFSMPMSM), and the noise of AFSMPMSM is analyzed and calculated by using analyzing software of FEM. The two results of FEM calculation and sample machine's experiment are contrasted, and it is proved correctly of using this FEM to calculate the noise...
The change of Virtual currency strategy is common in electronic business. Online game is one of the areas where virtual currency strategy changes frequently. This research focuses on how the change of Virtual currency strategy effects customer satisfaction. Online games' economic problems attributed the problem of inflation. And the change of Virtual currency strategy associates that of Inflation...
The study shows that the relationship between leader-member exchange and Employee job attitudes is significant and LMX plays a mediating role in the relationship between interpersonal justice, informational justice and the job attitudes; psychological contract violation is negatively related to job attitudes, and it plays a mediating role in procedural justice and partially mediates the relationship...
Abstract-The dynamics model based on aeromodelling uses computer control technology and GPS positioning. The coverage and flying precision of unmanned aircraft can be increased greatly. Effective control of observation area is achieved. It takes lots of time to calculate the path points if traditional continuous path control algorithms are adopted. It is not conducive to real-time control of aircraft...
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