价值分析

Thus, to study tooth surface curvature is significant. However, from the published information, the curvature of face gear drives hasn′t been well studied until now. Based on the knowledge of differential geometry, a method for calculating principal curvature and principal directions for face gears is established, and thus the principal v...

文中利用微分几何原理推导了面齿轮传动的齿面主曲率与主方向，由此得出面齿轮传动中诱导法曲率的两个主值；开发了相应的程序；进行了实例计算；分析了传动中的主要参数对曲率的影响，所获得的结论对面齿轮传动的强度计算与分析具有参考价值

In this article, I start with the common stipulation of relativity principle, and find out the value and shortcoming of it .Then, I make further research on the importance and practical significance of the breakthrough.

本文正是基于上述问题，从相对性原则的一般规定入手，从中分析得出该原则存在的价值与不足，从而进一步分析突破该原则的重要性和现实性。

Third, based on the example of over proof on-load loss in 180MVA/220kV power transformer, the eddy loss in winding is analyzed with the leakage flux element software. Some conclusions with practical use are given. In order to reduce the load loss, primarily we should reduce radial leakage flux of transformer possibily.

运用漏磁场分析软件，以180MVA/220kV电力变压器负载损耗超标为例，进行详细分析，提出有工程实用价值的结论：降低变压器负载损耗，从根本上应尽可能减少变压器辐向漏磁。

In this study, the employee's willingness-to-participate in and willingness-to-pay for hypothetical supplementary health insurance packages designed by the research team was measured through contingent valuation method in Shanghai and Wenzhou. In Chengdu, the employee's actual rate of participation in supplementary health insurance was obtained through household survey. Logistic model was employed to establish the demand function and analyze the influencing factors. The organization and operation models for supplementary health insurance in different cities were summarized and comparatively analyzed. Based on the above results, proper coverage of health care and operation model for supplementary health insurance was discussed. Policy recommendation include the clear definition of the government's responsibility in the development of supplementary health insurance, the implementation of tax subsidy policy, the rule of the purchase of supplmentary health plans with personal saving accounts, and education and propagandism measures. At last, the regulation of supplementary health insurance is emphasized.

本研究根据上海和温州两地基本医疗保险框架分别设计了几个补充医疗保险方案，采用条件价值评估法调查了职工对这些补充医疗保险方案的意愿参加与意愿支付；在成都通过家庭入户调查获得了职工实际参加补充医疗保险情况，运用logistic模型建立了需求模型，进行了需求的影响因素分析；对国内补充医疗保险不同运作模式进行了总结与比较分析，探讨了补充医疗保险适宜的覆盖范围及其组织运作模式，并提出要明确界定政府在补充医疗保险发展中的职能定位，运用税收减免政策、允许用个人帐户购买补充医疗保险和宣传教育措施来扶持与引导补充医疗保险的发展以及加强补充医疗保险监管等政策建议。

The sliding mode control, which is better than the linear quadratic optimization, achieved ideal control result by using comparatively less external energy. The sliding mode control method is valuable to study.

基于模态分析的滑动状态控制比线性二次最优控制用较少的外部能量可得到较好的控制效果，基于模态分析的滑动状态控制是一种有研究、开发价值的控制算法和控制方法。

According to analysis and reference from colour source,this paper points out that it is indispensable and with sufficient reasons to define Happening Colour.It enumerates familiar expressions about Happen- lug Colour and analyzes its colour character.It compares Happening Colour with traditional colour about colour relation,colour concept,the mode of colour management and the method of colour using.It explains realizingly that Happening Colour has very important innovational significance and application val...

Design colour ； Natural colour ；本文根据对色彩来源的分析和借鉴，提出了偶发性色彩定义的理由和必要性，列举了偶发性色彩常见的表现形式并分析其色彩特征，比较了偶发性色彩在色彩关系、色彩观念、色彩管理模式、用色方法等方面与传统设计色彩的差别，明确了偶发性色彩在当代设计领域所具有的创新意义和值得挖掘的应用价值，完善了偶发性色彩的界定标准。

In this paper, the theories of generation function and recursive relation in combinatorics is used to analyze the time complexity of some special recursive algorithm, with three conclusions reached simultaneously, which is of valuable reference to the analysis and research on algorithm.

提出了用组合数学中的母函数与递推关系理论来分析一些特殊的递归算法的时间复杂度，并同时得出三个推论，在算法的分析与研究方面具有一定的参考价值。

By this way, the extend and degree of the masses were illustrated intuitionally and it was made out that the main destroying form was toppling rockfall .

在分析砂、泥岩特性的基础上，通过离散元数值分析，研究了万县长江库岸危岩在不同工况下的稳定性，直观地揭示出危岩在不同工况下的破坏程度，得出危岩的主要破坏形式为倾倒式崩塌，并总结出危岩的大规模破坏发生在蓄水回水期，为三峡危岩治理的对策及时间提供了有价值的参考。

Research on the Basic Kinematics-Geometry Theory and Tool Positioning Strategy for 5-axis NC Machining;2. The paper introduces the construction features of undevelopable ruled surface integral impeller and two 5-Axis numerical control mill machining methods of vane shape which are "line contact" and "point contact".

文章介绍了不可展直纹面型整体叶轮的结构特点及五坐标数控铣削加工叶片型面"线接触"和"点接触"两种方式，分析了采用侧铣加工产生误差的原因，对加工中的不同工步及精加工薄叶片的特殊处理进行了分析，并提出了相应的解决方案，对整体叶轮的数控加工有一定的现实意义和实用价值。

A prediction model has been proposed to deal with threshold voltage shift as a function of 1MeV neutron flux and gate oxide thickness, and to deal with room-temperature annealing of threshold voltage shift induced-by 〓Coγ as a function of electric field and gate oxide thickness. The commonness and individuality of MOS device degradation between hot-carrier effect and ionizing radiation were investigated. The dependence of substrate current, gate current and threshold voltage shift due to hot-carrier on gate oxide thickness were simulated with MEDICI-2D simulator. The photocurrents of PN junction and bipolar transistor were studied. Their transient responses on varied bias voltages, pulse durations and absorbed doses were simulated. The influences of NPN base width on base and collector photocurrents were investigated. We also studied 1MeV neutron displacement damage in PN junction, and calculated reverse current leakage under the neutron flux of 2. 67×10〓 per square centimeter. 3 The study of nondestructive screening method for MOS radiation tolerance A theoretical and experimental study of nondestructive screening methods for radiation tolerance of nMOS and pMOS were firstly fulfilled. We determined the informative parameters pertinent to the method and proposed how to deal with experimental data and verify obtained results statistically, as well as make the required steps for nondestructive screening. Based on the experimental data of 180 samples of discrete pMOS devices, the relation between sample quantity and correlation coefficient, screening equation, and other significant results were obtained from the threshold voltage shifts of pre-and post-irradiation samples.

二、分立器件电离和位移辐射损伤响应研究在国内首次开展了电离辐射引起的氧化层阈值电压漂移和退火理论研究，编程计算了1MeV中子引起的MOS器件阈值电压漂移与中子通量及栅氧厚度的关系，计算了〓Coγ光子引起的阈值电压漂移及退火的时效曲线与纵向电场和栅氧厚度的关系等，对评估MOS型集成电路电离损伤和加固方法研究，以及论文中开展的MOSFETs无损筛选方法研究奠定了基础；分析了MOS器件热载流子损伤效应与辐射电离损伤效应之间的异同性，利用二维模拟软件MEDICI-2D模拟了衬底电流和栅电流，在不同栅氧厚度下随栅压的变化曲线，计算了热载流子效应造成的阈值电压漂移，研究结果对当前存在的以热载流子效应研究取代电离辐射损伤实验研究的设想，具有重要的参考价值；开展了PN结和双极晶体管电离光电流研究，计算了不同偏压、不同辐射脉宽和不同吸收剂量下PN结光电流的瞬时响应，计算了不同辐射脉宽下NPN晶体管基极电流和收集极电流的瞬时响应，以及基区宽度对NPN晶体管光电流的影响，研究结果对双极器件抗电离辐射损伤响应及加固方法研究具有重要意义；在国内首次开展了器件位移损伤的理论研究，分析了辐射产生的缺陷对电性能的影响，计算了注量为2.67×10〓cm〓的1MeV中子产生的缺陷对PN结反向电流的影响。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。