From the aeolotropy of hard rock of tunnel engineering region, the stress distribution of several kinds of fault to the water gushing of tunnel, the type of geology disaster involved in macrocharacter, main control factors, disaster mechanism and control strategy in tunnel excavating are studied systematically in this thesis. The purpose is to establish a theory and technology method for forecast and decrease disaster in tunnel excavating.

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In this paper, based on the former researches, satellite altimetry is used to monitor the water level changes of seven inland lakes in China. The contents and conclusions of this research are as following:1. Based on the characteristics of altimetric waveform, methods of improved waveform retracking are put forward. DEM or DTM model is introduced as the standard to estimate the retracked range for waveform retracking.

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The mechanical property testing shows that the seamless PLLA tubes perform excellent radial strength,which indicates that the mechanical properties of biodegradable stents made of these tubes was supposed to be excellent.PLLA and its composites were first used in preparing seamless tubes as antecedency of laser-cut biodegradable coronary stents in china.Finite element analyses of the biodegradable coronary stent model indicate the explorative design basically meets the requirement of reasonable and applicable stents.There is not such kind of research yet in domestic.Optimum laser-cuttting parameters of CO2 laser was cauculated based on experiential formula,within it,biodegradable coronary stents,especially those with complex structure would be manufacutured from seamless tubes quickly by laser microprocessing with high consistency to the design model.The processing efficiency of the CO2 laser demonstrated in experiential formula by us will play an important guiding role in manufacturing biodegradable stents by laser-processing.Our stents that ascribed to laser-cutted,slotted tube stent are proved to be biodegradable, self-expandable and good biocompatible,basically reach the international level on the aspest of manufacturing procedures and design.

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The direction and method for future antimony study are also suggested. The district in the Southwest of China is a good place to study the biogeochemical cycle and environmental effect of antimony, and this study will be of great importance.

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Furthermore, this criterion will have great referenced value to the study of forecast of unknow...

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According to the energy model in the paper, the behavior of liquid metal bridge in short circuiting transfer was studied by analyzing its menisci with three dimension Finite Element Method.

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Temperature, doping and electric field dependent parameters including energy band, impurity and carrier distribution, mobility and PN junction, etc are established The models which is demanded in unification and accordance in accurance, simulation speed, effective range and application efficiency are also obtained 3日韩性爱免费视频、Some unique or key low temperature physic effects, such as carrier freeze-out or trapping effect, mobility enhancement effect, steepened subthreshold effect, small dimension effect and heavy injection effect, as well as their influence to the device cryogenic performance are discussed and analyzed Based on the completely understanding of the physic nature and characteristics in low temperatures operation, the technique methods to overcome or to utilize the effects are also presented 4色呦呦禁止网站、By systematic analysis of carrier transportation, the device physic analytical model for advanced polysilicon emitter transistor with better cryogenic performance that can be used to simulate the quantity relations between device terminal characteristics and internal structure, doping distribution as well as operation conditions is presented.

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Secondly, it summarizes development and gradual progress about operational risk measurement. Analyzes and compares two main categories at present: bottom-up and top-down, and Loss Distribution Approach of top-down and Income Model of bottom-up is studied deeply, then finds out the main challenges of operational risk measure methods. Thirdly, taking examples for Shanghai Pudong Development Bank and Shenzhen Development Bank, it demonstrates operational risk measurement of our banking using Basic Indicator Approach and Income Model of bottom-up. And by comparing its effects with analysis result of concrete loss incidents of operational risk, it is approved that to apply operational risk measurement to our banking is feasibility. Finally, the paper analyzes difficulties to measure operational risk, such as weak consciousness of measuring operational risk, short of effective modern measuring model, behindhand of loss data collection and lack of perfect inside management mechanism of measurement, and then gives some advices.

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