The principle of the hydraulic shear system, the change of the shear force in the steel bar cutting-off process, and the structure and action principle of the buffer of the cylinder were analyzed at first in the paper.

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This device use the principle of additional DC power supply in main feeding switch, and use the principle of direction of zero sequence power in branch feeding switch.

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In the thesis,the author systematically discusses the novel semi-inverse method ofestablishing GVPs or SGVPs in fluid mechanics,from 1-D unsteady flow to full 3-Dunsteady flow,from direct problems to hybrid ones.

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From these particular big systems I have appropriated unifying principles for all large vivisystems; I call them the laws of god, and they are the fundamentals shared by all self-sustaining, self-improving systems.

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According to the basic principle of self-balanced pile test method and the conversional simplified conversion method, the pile bearing capacity between the equivalent loaded piles and self-balanced piles were compared. The influence of negative skin friction on self-balanced pile test was studied. The conversion formulas of pile bearing capacity and settlement were derived.

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For solving the deficiency of the oil-belt method, we developed a seeding device test bench including the part of draining sand, draining seed, conveying and controlling by paving sand on conveyer belt.

針對現(xiàn)有黃油皮帶法工作原理存在不足乱伦视频APP，研究采用鋪砂原理研制了一套由排砂、排種、輸送以及控制等工作部分組成的排種器試驗臺。

This paper introduces the structure and working principle of how to machine the crown set of rubber-covered roll in paper making using CQ61100 lathe.

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In this paper, the principle of dynamic balancing for rice mill shafts is studied.

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Based on EPS particle,sample is made by coating carbon black on EPS particle and the absorbing property of sample is analyzed by law of scattering and cavity resonance theory.

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It introduces China pharmaceutical industry's characters and problems and then analyzes influence factors from the macroscopically, interspaced and microscopically views. Chapter four is the empirical research part in this paper. It introduces the principal of appraisal index and the choosing of the indexes. Then it introduces the building of model and its disposal method in Spss. To get a clear view of principal components analysis the paper analyzes the differentiate and connection between PCA and factor analysis. In this basement, the paper introduces the disposal process and results of the model. The paper then improves the model with entropy right method to eliminate the portrait diversity of data. To validate the model's stability, the paper makes a significance test of the four results.

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