A user-friendly, time-saving computer-automated test system for quasi-optical overmoded waveguide frequency multiplier grid array research has been developed, utilizing the graphical programming software Labview and t...
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A user-friendly, time-saving computer-automated test system for quasi-optical overmoded waveguide frequency multiplier grid array research has been developed, utilizing the graphical programming software Labview and the standard interface GPIB (General Purpose Interface Bus). The system measures pulsed and CW power and efficiency by controlling an RF source, gathering data from oscilloscopes, and calculating input and output power levels and efficiencies utilizing calibration tables. The efficiencies and output powers for frequency tripler and doubler grid arrays have been tested. Experimental results of output power and efficiency versus input power for a frequency tripler grid array and efficiency versus frequency for a frequency doubler grid array are shown in this paper.
A user-friendly,time-saving computer-automated test system for quasi-optical overmoded waveguide frequency multiplier grid array research has been developed,utilizing the graphical programming software Labview and the...
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A user-friendly,time-saving computer-automated test system for quasi-optical overmoded waveguide frequency multiplier grid array research has been developed,utilizing the graphical programming software Labview and the standard interface GPIB(General Purpose Interface Bus).The system measures pulsed and cw power and efficiency by controlling an RF source,gathering data from oscilloscopes,and calculating input and output power levels and efficiencies utilizing calibration *** efficiencies and output powers for frequency tripler and doubler grid arrays have been *** results of output power and efficiency versus input power for a frequency tripler grid array and efficiency versus frequency for a frequency doubler grid array are shown in this paper.
Because of their ability to exploit the tolerance for imprecision and uncertainty in real-world problems, and their robustness and parallelism, artificial neural networks (ANNs) and their techniques have become increa...
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January 1994, the Iron Ore Company of Canada (I.O.C.C.) started a three-phase program to re-engineer its Peiletizing Process Control System. Phase one of the program involved a thorough evaluation of existing and futu...
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CSO emission is widely considered a significant pollution source to receiving waters in urban areas. The existing deterministic sewer models are not able to predict CSO emission effectively. In this study, a conceptua...
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CSO emission is widely considered a significant pollution source to receiving waters in urban areas. The existing deterministic sewer models are not able to predict CSO emission effectively. In this study, a conceptual CSO emission model SEWSIM has been developed using a powerful programming package MATLAB and SIMULINK. A sewer system consisting of an impervious catchment and a sewer network is schematised as two linear dynamic reservoirs. The following physical processes are conceptually modelled: rainfall-runoff;surface solids buildup and washoff;sewer sediment erosion and deposition. The model is suitable for both event-based and continuous simulations. Some simulation results demonstrate that SEWSIM predicts pollution load of CSO emission more effectively than deterministic models.
Though existing search engines have provided efficient tool for network information retrieval, there are still some *** are several improvement ways,such as eliminating unrelated documents or changing their order by d...
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Though existing search engines have provided efficient tool for network information retrieval, there are still some *** are several improvement ways,such as eliminating unrelated documents or changing their order by deep analyzing for results of single search engine, combining or intersecting the results of multiple search engine to improve the recall or accuracy, which all limited for no local index *** decide to build up a new intelligent network retrieval system with our own local index *** independently will cost much and too difficult to keep the integrity,to take advantages of search engine,we construct it on base of search ***,driven by a big keywords table,fetch URL from special search engine by CGI programming,men get all responding full documents and analyze them deeply to form the features(Second-hand Document,SD) *** this,build up kinds of index base needed by possible retrieval *** the information retrieval service,system will renew the bases to reflect real network information by automatic searching according to the old network structure,which was built by existing URL *** last perfect retrieval system is still not implemented,but the initial performance is satisfying.
The paper describes the use of algebraic linear programming for the minimum weight design of steel portal frames subject to the constraints of the Kinematic Theorem of plastic collapse. Minimum weight design is a clas...
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The paper describes the use of algebraic linear programming for the minimum weight design of steel portal frames subject to the constraints of the Kinematic Theorem of plastic collapse. Minimum weight design is a classic linear programming problem which can be solved algebraically for classes of frames with arbitrary geometric dimensions and arbitrary load magnitudes. In a recent paper, the process of algebraic linear programming was reduced to the repeated application of a number of vector formulas and a computer program was developed for the derivation of the solution charts for specific classes of frames. In this paper the method is extended to the problem of frames subjected to multiple load cases. It is shown that simple problems whose solution can normally be displayed in the form of two-dimensional charts now require three-dimensional charts or a number of two-dimensional charts. (C) 1997 Civil-Comp Ltd and Elsevier science Ltd.
The limit analysis of regular plane frames consisting of meshes of strictly four members is considered. The inherent difficulty of the force method for automatic geometric data generation is overcome by developing an ...
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The limit analysis of regular plane frames consisting of meshes of strictly four members is considered. The inherent difficulty of the force method for automatic geometric data generation is overcome by developing an algorithm which is used to provide a statical basis. Using a shortest path technique between two points of an undirected graph, consecutive cycles are found whose check for independence is done by fictitiously increasing the lengths of the cycle's members. Equilibrium with applied loads is satisfied by the use of cantilevers that coincide with the shortest path of each load to the ground. Examples of application are given. (C) 1997 Civil-Comp Ltd and Elsevier science Ltd.
Effective quality management in teaching and learning can be implemented by careful planning of the subject delivery system, active student involvement and continuous evaluation system in the classroom. In this paper ...
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