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High liquefaction temperature and greenhouse effect are two major problems of SF6. To find alternative gas of SF6 becomes an urgency in power industry. In this paper, the insulation characteristics of c-C4F8/N2 are studied. The AC breakdown voltage in slightly non-uniform electric field with different air pressure and mix ratio is measured. The results show that breakdown voltage increases with the...
The design of lever amplification mechanism plays the crucial rule in the performance of double-feet piezoelectric linear motor which is based on the lever amplification principle. The kinematic principle of double-feet piezoelectric linear motor based on the lever amplification mechanism was analyzed and the dynamic model of the lever amplification mechanism based on the flexure hinge was established...
An alternate stepping piezoelectric linear motor was proposed. The operation principle of this novel linear motor was analyzed. A prototype was fabricated and its mechanical properties was tested which proves that the principle is feasible. When the motor is driven by three-phase square and triangular waves and four-phase sine waves at a voltage of 100V(peak to peak value), and frequency of 100Hz,...
In micromanipulation tasks, the interaction force between the manipulator and an object or environment is difficult to control. In the traditional approach, force control is achieved by controlling the displacement of the end-effector during contact with an object, and therefore controlling of force and displacement cannot be decoupled. In this work, we propose to achieve interaction force control...
In cellular networks, the introduction of device-to-device (D2D) technology could promote cell coverage and improve user experience. In this paper, we consider the scenario of relay assisted D2D communications, and propose a relay selection and resource allocation joint algorithm. The algorithm takes relay selection and resource allocation into consideration simultaneously. And we determine the optimal...
To solve the problem of low storage efficiency and database block caused by large object data in the process of enterprise information, the integration application of File Transfer Protocol (FTP) combining with Oracle database is employed to deal with the problem. In the network environment of enterprise practical producing, the tests of the four methods, including BLOB method, BFILE method, SecureFiles...
It is one of the highlights in the third revision of overall land use planning in China that strengthens the planning management, guarantees the land use and realizes the goal of the planning. This paper introduces the systems of the management measures for implementation of the land use planning in China, land use planning guidelines and its essence, makes systematic analysis to some prominent problems...
The paper discussed the regional development law of land reform to follow, form the current land management system. It analyzed the definite of land reform to strengthen the understanding of the current land system, and specific to explore the reform and improvement of the existing system of the land based on the characteristics of the market economy, and it has certain practical significance.
With the startup of new round of planning, our land-use planning has entered a new stage of development. It is meaningful to build the land-use planning management information system, promote the scientific level of the land-use planning, improve the efficiency of daily work, strengthen the criterion of land-use planning management. The paper made a detailed operation-analysis according to the character...
Under the support of the computer technique and the software of GIS, It forms a software support systems for solution to the land use planning implementary evaluation, according to the mathematical model and the specific processes of implementary evaluation. The system provides user-selectable menu for various view of operations and information processing, the system has a friendly interface, simple...
Urban land utilization plays an important role in city development, We establish the "urban land information system based on GIS" in order to inspect urban land structure and utilize a model automatically, A series of codes abstracted from urban land sustainable utilization significance are used as measures in land inspection, GIS tools combined with "urban land information system"...
The integrated administrative system of the real estate has been developed based on GIS. Depend on the spatial inquiry and analysis that GIS has, the new system covers the functions: management and decision of the real estate development, real estate business, real estate agency, estate management and so on. Moreover the present information of real estate industry can be reflected and offered speedily,...
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