可计算关系

According to the principles of synthesis, dominance, regionality and relative consistency, the environment degradation evaluation system is divided into three classes: vulnerable region, vulnerable type and vulnerable cell. The research area belongs to the erosion degraded Southern Red Hilly Area region. Based on the conceptions and grading, the dissertation probes into the methodology of evaluation and case study, and establishes a potential degradation evaluation system which comprises altitude, gradient, soil erosion index K, annual rainfall, the proportion of rainfall in raining period, and the drought index of rainless period.

在脆弱性概念及其分类的基础上，本文进行了脆弱性评估的方法探讨和实证研究，在脆弱性分析的基础上，选择高度、坡度、土壤可蚀性K值、降雨量、暴雨量、多雨期降雨比重和少雨期干旱指数为潜在脆弱度指标；选取作为区域人地关系、社会经济发展与管理水平综合影响结果的人类活动指标森林覆盖率和坡耕地指数作为现实脆弱度评估的人为加速侵蚀的修正指标，计算生态环境的现实脆弱度，并将其指标体系与方法用于衡阳盆地生态环境脆弱度评估的实证研究。

The relation between the movement parameters in the flow field of jig could be obtained by the Navier-stockes equation of fluid dynamics. The fluid in different jig structure dimension and shape could be calculated and diagrammed by use of calculate fluid mechanics and potential motion theory. The flow field and streamline of jig at different case are expressed vividly, which could provide rational basis for selecting and designing jig structure.

由流体运动的Naver-Stockes方程得到跳汰室内的流场运动参数间的关系，用势流理论对运动流场进行研究，通过计算流体力学方法对流体运动参数在结构不同的跳汰机的跳汰室内的流场进行了绘图，形象地把不同结构的跳汰室的流场、流线体现出来，可为合理选择跳汰机结构提供依据。

At the same time, according to the related theories, theoretical relation of soil water profile was established under the condition of ponded infiltration and limited soil redistribution, the results were verified with measured data and proved to be reasonable.

此外，研究表明，导热率与土壤含水率、土壤水吸力、含盐浓度之间均存在良好的幂函数关系；在取得一定温控条件下的土壤水分与温度分布实测资料的基础上，根据Philip经验方程，通过差分法计算得出温差作用下的水分扩散率，该参数可表示为温度的幂函数形式。

Through scheduling process analysis of periodic task, the waiting limit formula of each task in ready queue was obtained while guarantees its deadline. In addition, some properties, such as final preempting time was deduced and the necessary condition of periodic tasks preempting behavior was described quantitatively. Based on them, a micro scheduling preemption model for periodic tasks in ready queue was put forward, which decreased the number of preemptions and optimized system performance through changing the preempting sequences.

通过分析周期性任务的调度过程，得出在确保任务不错过截止期条件下，各个任务在就绪队列中可等待的最长期限计算公式，并根据公式推导出任务满足截止期的最后抢占时刻等属性，从而定量地刻画了周期性任务抢占行为发生的必要条件，提出了一套对周期性任务的就绪队列进行微调度的抢占模型，通过改变抢占关系来减少抢占次数、优化实时系统性能。

Finally, determine reservoir lithology and pore fluid properties. This method requires only small and medium angle seismic data, and all other elastic parameters are from the elastic density ratio and acoustic impedance.

该方法仅需要近、中角度的地震数据，其他弹性属性参数是由弹性密度比与声波阻抗之间的关系通过道运算获得，提高了计算效率，可用于绝大多数采集条件下获得的地震数据叠前反演。

Based on the relationship between the numerical aperture of the objective lens and scale pitch, this study chooses a suitable Plano-convex lenses available on the market, so as to approximate the diameter of the focusing spots to scale pitch. Also, by using the optical path of an optical encoder similar to the nanoscale, the changes in the surface profile of the scale can be measured directly, so as to obtain the two quadrature sinusoidal signals. By counting the zero crossing of these two quadrature sinusoidal signals and calculating the interpolation value of these two quadrature sinusoidal signals, the moving direction and moving displacement value of the scale can be obtained.

研究中再以搭配物镜的数值孔径与尺条间距的关系，选择ㄧ适当的市售平凸透镜，使聚焦光点的直径与尺条的间距相近，并使用相同於奈米级长行程双雷射聚焦读头装置的光路设计，如此将可藉由直接量测尺条的表面轮廓变化，以获得一组正交弦波讯号，继而利用讯号四分割与细分割处理，计算出尺条之移动方向与移动量，研制出一实用性长行程双雷射聚焦读头光学尺。

Cavitations is the major problems of designing water hydraulic valve, understanding the relationship between shape of valve and cavitations , avoiding cavitations is extremely important, this paper, the numerical simulation and visualization research of flow field is carried out to research relation between the flow field of poppet valve and the length of valve seat by finite volume numerical method.

气穴是研制水压阀存在的主要难题，认识阀口形状与气穴的关系，避免产生气穴现象是极其重要，本文应用有限体积数值计算方法针对阀座倒角长度变化对水压阀阀道内流场的影响进行数值模拟和可视化研究，得到了一些有益的结论：倒角长度的改变对阀口间隙以及阀芯锥面与柱面相接的地方的负压会产生比较大的影响

It was found that electrical field strength and potential around the the sample changed less in the fully insulated chamber than in conducting material phytotron, so it is closer the real condition. Based on the design, the first fully insulated large artificial climate chamber in China, in which temperature , humidity, and atmospheric pressure can be regulated, has been built in our laboratory. The paper developed an insulation parameters automatic test system of high voltage capacitive equipment based on LabVIEW. In the chamber, On-line tanδmeasurements of the capacitive transformer bushings were completed. The effects of environmental factors on tanδwere analyzed, and the curves between the tanδand the environment parameters were acquired. Then, a grey relational model to analyze the effects of main environmental factors on tanδwas built, and the grey relational grade between them was gained in this paper.

完成的主要工作和取得的主要研究成果如下：提出了全绝缘型人工气候室设计方案，计算分析了气候室内悬挂绝缘子和套管时的空间电场分布情况，并和金属材质气候室相比较，论证了该方案的优越性，据此方案研制的全绝缘人工气候室可调节温度、湿度和压力等参数，满足了人工气候试验的要求；开发了基于虚拟仪器技术的高压电容型设备绝缘特性自动测试系统，完成了人工气候室内变压器套管tanδ的在线测量试验，以此为基础分析了环境因素对电容型设备tanδ的影响情况，获得了tanδ与环境参数的关系曲线，建立了环境因素对tanδ影响的灰关联分析模型，得到了主要环境参数与电容型设备tanδ的灰关联度。

And a new mechanism is provided to store the data of OWL in relational database, the hierarchy structures of classes and properties defined in the OWL are also kept through views of the database system. 2、 Proposed a new method of using Finite State Machine and execution tag tree to describe the excution logic of existing grid service and the goal service specified by users, using Deterministic Propositional Dynamic Logic and FSM to determine the composable of goal service and make the composition plan. The computation complex is also discussed 3、 Designed some algorithms to compose existing grid services according to user requirement.

同时提出了一种新的机制，使用关系型数据库来存储OWL定义的实体，使用视图表示OWL中定义的类之间和属性之间的层次关系； 2、提出了使用有限状态自动机和执行标记树，表示网格系统中存在的网格服务和代表用户需求的目标服务的执行概要和逻辑，结合确定性动态命题逻辑，研究了目标服务的可组合性和自动组合模型，并讨论了组合模型的计算复杂度； 3、设计了一种根据用户需求来组合已存在的网格服务的算法。

The structures with the highest flippable score in a binary text image are selected out for information hiding. Two schemes for hiding information in a binary text image are proposed, one is relation hiding and the other is structure hiding.

根据具体分析和分值计算结果，提出了利用象素可翻动性分值最高的结构在二值文本图象中隐藏信息的两种方案，一种是关系隐藏法，一种是结构隐藏法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。