This software is based mainly on Technical code for building slope engineering (GB50330-2002). It offers interface handle platform and flexible drawing blocks which is convenient to the designers. Computer Aided Design system includes design, analyses and calculation and drawing is formed.

By means of high-level language, data base and interface techniques and computer graphics, this article introduces a CAD system for downhole tools in accordance with the requirements of design, calculation and drawing of these tools, and describes emphatically the characteristics and functions of the system and the key problems solved by the system.

The computer aid design solves the problem of complicated calculation and drawing making. The dome lining developed by the system has the advantage of less brick type and meeting project requirements.

The purpose of this paper is to analyse the protection area and calculate the basic tache of the computer aided design about the protection area of the lightning rod In order to verify the protection area, manual calculation and plotting methods are usually used by designing departments and running units.

Using ActiveX automation and ADO techniques, the house architectural area computing and plotting system was developed under Autocad R14 environment with VB 6.0 and Access database in order to solve above problem.

The Matlab engine, main functions in the engine library and the method of how Visual C++ calling Matlab are introduced in this paper. This technique i s applied in the design of virtual reality program for aircraft-arresting proces s . The interface is programmed by VC, and the model is established by Matlab/Si mulink, with which simulation computing and plotting are completed.

The interface is programmed by VC, while the model is established by Matlab/Simulik, with which simulation computing and plotting are completed. Virtual Reality Modeling Language designs virtual running scene. Using the programming method, programming efficiency is increased and software development period is shortened.

The software can be used for the general calculations and plotting of the residence time distribution,the mathematical expectation,the variance,the model parameter in single still,double still and third still of the chemical reaction engineering.

The calculation and drawing procedures are described.

It enables calculation and drawing of the body temperature and drying curves for the whole drying process and identification of the vapour-liquid interface receding into the body.

A computer program for calculation and plotting of stress distribution and faulting

The heterogeneity of sorption onto tuff and basalt could be well characterized by the LF and GF models by means of the calculation and plotting of the affinity spectrum.

The accuracy of the procedure used has been checked by back calculation and plotting the theoretical curve with the superimposed experimental points.

Figure 4 shows the results of the calculation and plotting of the resistivity of the cross-section profile 3-3 which traversed the rooms.

A new type of potential-pH diagram has been developed on such a principle that all species in solution and in solid state have to be in equilibria, as is more appropriate to practical processes. For Cu-NH_3-H_2O system, the species in solution consist of Cu~(2+), Cu~+, HC_uO_2~-, CuO_2~- and all kinds of copper-ammonia complex ions, as well as solids of Cu, Cu_2O and CuO. According to the phase rule, the number of components is five, with temperature and pressure in constant, the number of degrees of freedom...

A new type of potential-pH diagram has been developed on such a principle that all species in solution and in solid state have to be in equilibria, as is more appropriate to practical processes. For Cu-NH_3-H_2O system, the species in solution consist of Cu~(2+), Cu~+, HC_uO_2~-, CuO_2~- and all kinds of copper-ammonia complex ions, as well as solids of Cu, Cu_2O and CuO. According to the phase rule, the number of components is five, with temperature and pressure in constant, the number of degrees of freedom is F = 5 -φ. With various Cu_(tot) and NH_(3tot), different potential-pH diagrams were obtained. When one of them--Cu_(iot), or NH_(3tot)--being constant, diagrams will be made with a series of iso-content curves. From that, three dimensional diagrams and other types of sectional diagrams can also be derived. All of these diagrams have obvious meaning and can be used to analyze the system to get useful information. Drawing is carried out with computer. Its method is described briefly and the results are discussed. Further applications can be expected in hydrometallurgical practice and in other fields.

A study on the equilibrium of cuprous chloride in aqueous solutions is presented. Based on experimental investigation, the stability constants of the complexes were carefully selected from different reports up to date, along with a simple formula for the evaluation of activity coefficients, an agreement of calculation with experimental data within 10% was obtained. A reasonable explanation was then obtained from a diagram of potential-total concentration of chlorine on the yield of cuprous chloride from copper-bearing...

A study on the equilibrium of cuprous chloride in aqueous solutions is presented. Based on experimental investigation, the stability constants of the complexes were carefully selected from different reports up to date, along with a simple formula for the evaluation of activity coefficients, an agreement of calculation with experimental data within 10% was obtained. A reasonable explanation was then obtained from a diagram of potential-total concentration of chlorine on the yield of cuprous chloride from copper-bearing solutions by reducing with sulphur dioxide and with metallic copper. It was shown that the method is useful not only for the thermodynamic analysis of practical systems, but alsofor the evaluation of equilibrium constants in study.

The automatic measuring system of the Josephson devices was realized on an IBM-PC/XT microcomputer with an A/D D/A data convertor inserted in it using the control programme. Using this system the I, V data can be collected, stored and ploted on the screen. Some calculations can be made on these data. Using our system the dc and ac I-V curves and associated dV/dI-V curves of a Josephson bridge junction were given, which was fabricated with high Tc superconducting material YBaCuO and used in a Josephson frequency...

The automatic measuring system of the Josephson devices was realized on an IBM-PC/XT microcomputer with an A/D D/A data convertor inserted in it using the control programme. Using this system the I, V data can be collected, stored and ploted on the screen. Some calculations can be made on these data. Using our system the dc and ac I-V curves and associated dV/dI-V curves of a Josephson bridge junction were given, which was fabricated with high Tc superconducting material YBaCuO and used in a Josephson frequency mixer between two Ka band signals. The simulative measuring of the I-V characteristics of Josephson junctions was also carried out using this system and a electronic Josephson simulator.