In this paper, we give out the essential ε-efficient solution for D.C. multiobjective problem, and discuss a new aigorithm for getting the essential ε-efficient solution and the equal theorem.
A portable device for the measurement of the reflectivity of radar absorbing coating is presented. It is based on the swept frequency RCS method. Using of this device is simple, quick and convenient than the conventional methods, as well with higher precision and more stable in performance than the other portable solutions. The design flow of this device is presented and the test results are analysed.
The walking procedure of the cattle on a paddy field before spring plowing was captured by the high-speed photography. The properties of the paddy soil used for tests and the geometrical configurations of the hooves of the cattle were examined. Combined with the fitted curve, the graphs of joint angle were drawn. The changes of the joint angles and the orientations of all limbs were analyzed, and...
The jumping procedure of the jumper in standing long jump was captured with a high-speed video camera. The geometrical configurations and motion postures of the jumper in standing long jump were analyzed from the high-speed photographs. By biological observation and kinematic analysis, the jumper jump was divided into stance phase, flight phase and land phase. Based on the observation, the jumping...
The testing experiments to poplar and larch logs samplings were conducted by using Arbotom and Fakopp stress wave testing instrument. The relationships among radial, tangential and longitudinal (heartwood and sapwood) propagation velocity of stress wave in the two logs samplings, and between radial velocity and diameter, as well as tangential velocity and the detection angle were studied. The results...
In recent years, hybrid systems theory and its applications have been focus researched. At first, commonly used models of hybrid systems research were classified overviewed, and then concept of hybrid systems theory were introduced. On the basis of this, analysis and optimization of hybrid systems were summarized in this paper. At last, the applications of hybrid systems theory in photovoltaic power...
Multiple voltage stability incidents show that system dynamic components have a great impact on voltage stability. This article mainly analyzes and summarizes the impaction on voltage stability based on the bifurcation theory caused by dynamic characteristics of main components in the power system such as load characteristics, generator characteristics, OLTC and Static Var Compensator (SVC).It Proposes...
A sub-pixel detection corner detection method based on fitting is presented, and mathematic algorithm of the method is in accordance with sub-pixel edge detection, improving the precision of the image measurement. In this paper, based on the geometry that the corner must be the point on the edge and intersection of two edge or many edge points, an algorithm based on the sub-pixel edge to get the intersection...
This paper introduces the principle and the process of the parametric design of de-airing pug press based on Pro/ Engineer. It carries out the research into the parametric design of 3-d model with the help of Pro/ Toolkit and visual c++.
The characteristics of real time operating system (RTOS) are analyzed and its advantages in design of embedded computer numerical control system (CNC system) are highlighted, according to comparisons with general operating systems. In this study, RTOS μC/OS - II is introduced in the embedded hardware platform of CNC system based on ARM and Motion Control Chip. Furthermore, the software architecture...
Dynamic testing is actually testing during the course of vehicle emissions, reflecting the real situation. Through the integration of detection equipment and analysis software, it realized real-time detection, data analysis and troubleshooting. Using single-chip microcomputer control technology development, it designed microcontrollers and gas sensors as the core of the hardware system. Using embedded...
Transformer Substation Simulation (TSS) is very useful as well as complex. Combining it with Virtual Reality (VR) technology is an inevitable trend. This paper analyzes the necessity of creating TSS based on VR. As the development-mode of traditional TSS has low efficiency to create Transformer Substation Virtual Simulation (TSVS), this paper proposes a components-based and flexible development-mode...
Training power staff in a virtual substation is green and safe. Virtual substation is usually made up of many substation power equipment virtual models (SPEVM) with high reality sense and strong interaction ability. This paper proposes a new modeling method which is based on 3D engine to implement virtual models of typical SPE. The designed virtual model contains geometrical model, interactive model...
Surface topography has a major impact on mechanical properties. Since actual measured surfaces contain noise, they are not suitable for analysis and investigation, reconstruction of surface topography is necessary. Discrete Fourier Transform can convert date in spatial domain to frequency domain. The surface information is confirmed from the amplitude- frequency distribution in frequency domain. In...
As a basic component of the primary tank's main driving system in our army, spiral bevel gears have complicated geometry structure. It makes the design and manufacture of gears very difficult. Spatial curved surface parameter and principle of conjugate curved surface are mainly studied on. The calculation formula of the first and the second class to the spatial meshing curved surface is calculated,...
Dynamic numerical simulation of the spreading of detonation wave was made by use of the explicit dynamic finite element analysis program. The results of numerical simulation are in agreement with physical phenomena and laws of spreading of detonation wave. The study indicates that the calculation model and simulation method are reasonable and feasible. The volume of electronic sensor both at home...