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SVC is a dynamic reactive compensator based on switching type HV electrical and electronic devices, well recognized as an effective means of resolving power quality problems. SVC is complex in structure, consisting of TCR valve sets, FC filter channel, etc. In particular, TCR valve set adopts thyristor serial connecting technology, and over 100 thyristors are adopted, which requires real-time status of devices in SVC to be monitored and uploaded, and even failures to be recorded. Therefore, the monitoring software becomes an important part in ensuring SVC safe operation. Combined with actual cases, this paper introduces a technology of using C++ Builder and Inter Base to design the static reactive compensator monitoring software. The user interface is elegant, with short development period, highly transplantable, and easily modified.

The paper establishes a three-dimensional solid model of the frame, and simplifies the frame model according to the simplification rules of finite element. Use Pro/MECHANICA module of Pro/ENGINEER software to carry out static and modal analysis of the frame, and to conduct sensitivity analysis of geometric parameters having a great impact on the frame characteristics, thus the most sensitive size parameters of the frame performance are gotten. By optimization design function of Pro/MECHANICA module, specifying goals of optimized design and ranges of size sensitive parameters, the frame structure is optimized.

This paper studies and designs the gems feeding manipulator, makes a detailed analysis of the overall structure and working principle of the manipulator, and establishes the three-dimensional model of the manipulator. The virtual prototype model of the manipulator is built in ADAMS software. Use simulation analysis functions of ADAMS to carry out kinematics and dynamics simulation analysis on manipulator, obtaining parameter curves of the manipulator such as position, speed and torque, which verifies it feasible to use manipulator to unload and load gems, achieving the design requirements.

According to the rock burst features occurred in the coal mass of roadway rib in one mine, the mechanics model of coal mass and roof structure system along the edge of goaf was founded to analyze the stress of roof rock layer, so the subside curve of roof rock layer was deduced. Furthermore, the stability of coal and rock system were analyzed, the critical load and critical resistance zone were used to judge the danger degree of rock burst occurrence. The influence of coal mass strength, brittleness degree, coal seam thickness, roof thickness, suspending length, equivalent shear module on the critical load, critical resistance zone was confirmed. So the rock burst occurrence conditions of coal mass in roadway rib mainly depend on mining depth, coal seam thickness and hard roof and floor, which are decided by the above studies, and successfully applied in prediction and prevention of rock burst in this mine.

Cost controlling is key behavior of getting more profits in an enterprise, but the cost of construction material cover 40-60 percent or more. So, reduce its cost as less possible as on the premise of insuring material quality is very important. The article starts from this, and gives some suggestions about controlling of the cost of construction material.