目的为减少因工位器具设计不当对作业人员带来的工伤。方法本文从人因工程的视角出发,以滤清器总成器具为例,运用工作姿势分析系统(OWAS,Ovako Working posture Analysis System)对汽车厂工位器具进行改善研究。结果研究表明应用工作姿...目的为减少因工位器具设计不当对作业人员带来的工伤。方法本文从人因工程的视角出发,以滤清器总成器具为例,运用工作姿势分析系统(OWAS,Ovako Working posture Analysis System)对汽车厂工位器具进行改善研究。结果研究表明应用工作姿势分析系统(OWAS)改善后的工位器具可以在满足零部件配送要求的前提下,最大程度减少作业人员在这一作业过程中的不合理姿势,能够有效保护作业人员。结论工作姿势分析系统(OWAS)用于工位器具的改善具有良好的效果,且操作简单,具有很高的应用价值和推广意义。展开更多
Production system of fully-mechanized face is a complicated system composed of human, machine and environment, meantime influenced by various random factors. Analyzing the reliability of system needs plentiful data by...Production system of fully-mechanized face is a complicated system composed of human, machine and environment, meantime influenced by various random factors. Analyzing the reliability of system needs plentiful data by means of system faults statistic. Based on the viewpoint that shift output of fully-mechanized face is the result of various random factors’ synthetical influence, the process of how to analyze its reliability was deduced by using probability theory, symbolic statistics theory and systematic reliability theory combined with the concrete case study in this paper. And it has been proved that this method is feasible and valuable.展开更多
Projections of geodetic are important for all countries all over the world, where using system coordinates for solving any problems in measurements of surveying works. Russell projection is one of projections used in ...Projections of geodetic are important for all countries all over the world, where using system coordinates for solving any problems in measurements of surveying works. Russell projection is one of projections used in some countries. Direct algorithms in this projection use two methods. The first method uses partial differential equation, which is not after six orders in the series. While, the second method uses traditional series （exponential series）, which is very difficult and requires complex statistical analysis. New methodology has been applied for direct algorithms in Russell projection using general law of unlimited algorithms by simple method.展开更多
Thermodynamics analysis was carried out for solar thermal receivers with different selective coatings.The relation between the energy conversion efficiency of a medium-high temperature solar thermal system,the spectra...Thermodynamics analysis was carried out for solar thermal receivers with different selective coatings.The relation between the energy conversion efficiency of a medium-high temperature solar thermal system,the spectral properties of selective coating and the operating temperature of the receiver were discussed.Furthermore,the relation between the optimum operating temperatures,the exergy efficiencies and the incident solar flux were analyzed for the traditional concentrating system and concentrating beam splitting system,respectively.According to the analysis results for the thermal receiver with blackbody surface and selective coatings,the optimum cutoff wavelength was obtained for the ideal selective coating.An analysis method for the optimum operating temperature calculation was developed for thermal receivers with selective coating.The optimum operating temperature for an actual selective coating was analyzed on the basis of the proposed theory.展开更多
文摘目的为减少因工位器具设计不当对作业人员带来的工伤。方法本文从人因工程的视角出发,以滤清器总成器具为例,运用工作姿势分析系统(OWAS,Ovako Working posture Analysis System)对汽车厂工位器具进行改善研究。结果研究表明应用工作姿势分析系统(OWAS)改善后的工位器具可以在满足零部件配送要求的前提下,最大程度减少作业人员在这一作业过程中的不合理姿势,能够有效保护作业人员。结论工作姿势分析系统(OWAS)用于工位器具的改善具有良好的效果,且操作简单,具有很高的应用价值和推广意义。
基金Project 50474069 supported by National Natural Science Foundation of China Project 20020290005 supported by Specialized Research Fund for theDoctoral Program of Higher Education
文摘Production system of fully-mechanized face is a complicated system composed of human, machine and environment, meantime influenced by various random factors. Analyzing the reliability of system needs plentiful data by means of system faults statistic. Based on the viewpoint that shift output of fully-mechanized face is the result of various random factors’ synthetical influence, the process of how to analyze its reliability was deduced by using probability theory, symbolic statistics theory and systematic reliability theory combined with the concrete case study in this paper. And it has been proved that this method is feasible and valuable.
文摘Projections of geodetic are important for all countries all over the world, where using system coordinates for solving any problems in measurements of surveying works. Russell projection is one of projections used in some countries. Direct algorithms in this projection use two methods. The first method uses partial differential equation, which is not after six orders in the series. While, the second method uses traditional series （exponential series）, which is very difficult and requires complex statistical analysis. New methodology has been applied for direct algorithms in Russell projection using general law of unlimited algorithms by simple method.
基金supported by the National Basic Research Program of China("973" Project)(Grant No.2010CB227305)
文摘Thermodynamics analysis was carried out for solar thermal receivers with different selective coatings.The relation between the energy conversion efficiency of a medium-high temperature solar thermal system,the spectral properties of selective coating and the operating temperature of the receiver were discussed.Furthermore,the relation between the optimum operating temperatures,the exergy efficiencies and the incident solar flux were analyzed for the traditional concentrating system and concentrating beam splitting system,respectively.According to the analysis results for the thermal receiver with blackbody surface and selective coatings,the optimum cutoff wavelength was obtained for the ideal selective coating.An analysis method for the optimum operating temperature calculation was developed for thermal receivers with selective coating.The optimum operating temperature for an actual selective coating was analyzed on the basis of the proposed theory.
