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Aiming at the development of the microprocessor-based relay protection and the lack of training and experimentation system which is difficult to satisfy the requirement , this paper describe a microprocessor-based relay protection training and experimentation system , put forward the design project about the combination of software which applied for computer protection based on integrated developing environment Visual Basic 6.0 and SQL Server and hardware which applied on Digital Signal Processing and the Personal Computer 104 bus-mastering machine, introduce systemic principle architrave and primary hardware form and the function and the aim of the software and its realizable way.

针对目前微机保护技术飞速发展的形势和国内微机保护培训试验系统难以满足要求的现状,本文介绍了一套电力系统微机继电保护培训试验系统,提出了基于DSP和应用PC/104总线工控机以及利用集成开发环境VB6.0和SQL Sever的软硬件结合的设计方案,对系统的原理框图、主要硬件构成和软件的功能目标及主要功能的实现方法进行了详细的介绍。

The main points of this paper are as follows:(1) The actuality and the deficiency of the current workflow technology is analyzed according to the expatiating on the workflow technology.(2) A workflow model supporting the dynamic modifying and its implementation arithmetic and an implementation method using the OO technology is proposed according to the Directed Graph theory.(3) The strategy of dynamic modifying of workflow model is researched, a improved conversion strategy is proposed, and the detailed process of dynamic modifying is discussed.(4) Having researched on the construction scheme of digital campus based on URP and the workflow of office business, an OA system model based on dynamic workflow technology was proposed according to the workflow management system model and several typical functions of OA workflow management system were realized, which is of high value on improving the autoimmunization of business operation and the cooperating work ability.

论文的主要内容如下:(1)通过对工作流技术的全面阐述,分析了目前工作流技术发展的现状和不足,为自己的研究工作划定了问题域范围;(2)利用有向图定义了一个支持动态修改的工作流模型,并给出了该模型的执行算法,给出了该模型利用面向对象技术的一种实现方法;(3)详细讨论了工作流模型的修改策略和方法,提出了一种改进了的转换策略,并给出了动态修改操作的具体步骤;(4)在深入分析基于URP的数字校园建设方案以及办公工作流程的基础上,结合工作流管理系统参考模型,提出了基于动态工作流技术的OA系统模型,实现了OA工作流管理系统中几个典型的功能,对提高业务处理自动化,提高协同工作能力具有重要的应用价值。

Driving force of wheel on soft lunar soil is much different with wheel on the ground of the earth.Wheel sinks and slides easily on lunar soil.The driving force formula of wheel based on Bekker formula is much complex,for forecasting driving force,curve fitting based on least squares method was introduced to simplify formula driving force.The driving force can be calculated through measuring wheel sinkage and slide.

基于Bekker轮-地力学理论的车轮驱动力计算公式复杂,不适合直接计算,为实现车轮驱动力预测,为车轮驱动力优化提供计算基础,本文采用基于最小二乘法的数据拟合方法对车轮驱动力进行数值拟合计算,为实时的车轮驱动力预测提供可行的方法,从而实现对车轮驱动力的优化。

The soil erodibilities are compared and appraised for the majority of the soil types in Ningxia. The method published by D. W. Fryrear et al is adopted to calculate erodible fractions for the soils in Ningxia. The erodibilities of main soil types are compared and analyzed. Spatial distribution of soil erodibilities in the region can be perceived on the Map of Ningxia Soil Erodibility. The map is based on the digitized map of soil types of the all region by means of the geographical information system of Region Manager. Evaluation results show that erodible soils occupy a large portion of the total area of the region.(3) The third task is evaluation of effects of human activities for farming on soil erodibility. Tillage and cultivation can alter soil properties. The paper, based on the discussion on the characteristics of farmland suffering wind erosion in the region, analyzes the contents and intensities of farming disturbing surface soil. Emphasis is paid on the effect of farming on erodibilities of each type of soil.

W Fryrear等人的计算土壤可蚀部分含量的方程,此方程的自变量包括土壤有机质、碳酸钙、沙粒含量、沙粘比,计算了宁夏主要土壤类型表层的可蚀含量,进而比较它们的可蚀性,并以宁夏土壤分布图为底图用地理信息系统建立了宁夏土壤风蚀数据库,完成了宁夏土壤可蚀性图,评价结果显示宁夏地区主要的土壤类型较容易遭受风蚀;(3)农业经营对土壤风蚀的影响及其评价,在分析宁夏农业土壤遭受风蚀特征的基础上,首先讨论了农业活动对土壤理化性质的干扰,评价主要耕作栽培措施对土壤风蚀的影响,选取粗糙度、表面结皮、可蚀颗粒含量、留茬和有效时间为指标,用打分方法作了评价。

The first part is the introduction, which generally introduces the research purpose and significance of this thesis, the summary of the financial pre-warning researches both home and abroad, and the research main contexts and research methods; The second part is the comparison on the financial pre-warning methods existent, which compares the different methods by categories, makes a further analysis on the limits of existent methods, and proposes the improve thoughts of this research based on that; The third part is the basic theory, which makes a summary of the referent theories exerted on the research, and exposit the comparing mechanism of the grey prediction theory and the artificial neural network method concise; The fourth part is the frame work of the model, which illuminates the research designs step by step, such as the definition of the financial crisis, the method of sample select, the select and definition of the pre-warning variables, and makes an exposition of the establishment procedures of the whole models at last; The fifth part is the financial pre-warning based on the theory of grey prediction and artificial neural network, which mainly demonstrate the model establishment in the concrete, dividing into four part to carry out the part of pragmatic research integrally, building of indexes system, establishment of BP neural networks, dynamic financial pre-warning and test, analysis on the pre-warning result; The sixth part is conclusion, which sums up the main results of the whole research, clarifies the innovative points, and makes a discussion on the limits and future study directions of the research in this thesis.

其中,第一部分为导论,总括性概述本文的研究目的与意义,国内外研究综述,以及本文的研究内容和方法;第二部分为现有财务预警研究方法剖析,通过对现有预警方法进行分类比较,进一步分析现有预警方法的局限性,并在此基础上提出本文研究的改进思路;第三部分基本理论,对本文研究中运用的相关理论进行扼要概述,并简要阐述灰色预测理论与人工神经方法的融合机理;第四部分为模型研究框架,逐步阐释模型对财务困境的界定,样本数据的选取方法,预警变量的选取与定义等各个部分的研究设计,并对整体模型的构建步骤进行简要阐述;第五部分为基于灰色神经网络模型的财务预警,主要论述动态预警模型的具体实现过程,分模型指标体系的建立,BP神经网络的建立,动态财务预警与检验,以及预警结果分析四个部分全面阐述本文实证分析过程;第六部分为结论,总结本文研究得到的主要研究结论,以及本文研究中的创新之处,并对论文的不足与后续发展研究进行探讨。

Incurrent research, aiming at the rupture problem engendered in the shooting process of acertain 5.56mm automatic rifle, the strain and stress distributions on the cartridge caseunder the action of axial pull have been analyzed. Based on the theories of elastic-plasticmechanics and contact mechanics, a mathematic and physical model of the cartridge-caseand chamber system has been set up; and based on the platform of the general softwarepackage APDL of ANSYS for finite element analysis, a parameterized model of thecartridge-case and chamber system has also been established. The method for nonlinearFEA has been adopted to analyze the stress distribution on the entire cartridge-case andchamber system, and the method of contact element has been employed to investigate thecontact stress between the cartridge case and chamber, and then the influences of frictioncoefficient and locking space on the static and dynamic stress and strain response of thecartridge case and chamber to the action of power gas have also been discussed. On thebasis of a lot of numerical tests, a kind of element Plane13, which is concentrated incoupled computation of heat and construction, has been used finally to simulate thetransient response of the cartridge-case and chamber system to the power gas. Throughloading the temporary thermal characteristics of explosive gas in the procedure of emulate, the corresponding transient thermal stress distributed on the entire system under thecombined load of transient thermal stress and transient pressure has been obtained. Owingto these comprehensive considerations, the numerical results obtained in this paperrepresent the actual situations comparatively exactly.

本文针对某5.56mm自动步枪在工作中出现断壳的问题,分析了弹壳在轴向拉力作用下的应力应变;基于弹塑性力学及接触理论,建立了弹壳弹膛系统的数学、物理学模型,在通用有限元ANSYS软件的参数化建模工具APDL平台上,建立了弹壳弹膛系统的参数化模型;采用非线性有限元法计算了弹壳弹膛系统的整体应力,引入接触单元法分析弹壳和弹膛的接触压力,探讨了在不同的摩擦系数和不同的闭锁间隙对弹壳弹膛静、动态响应的影响;本文进行了大量的尝试,最后确定采用热、结构耦合单元Plane13,在计算中加载了火药气体的温度历程,成功的获得了弹壳弹膛系统在瞬态的热载荷和瞬态的压力载荷同时作用下弹壳弹膛系统的热应力数值解,考虑因素全面,比较真实的反映了弹壳弹膛系统在火药气体压力和热载荷下作用的情况。

Firstly, the flood control regulation of TGP in Sep is computed based on the analyses on the inflow in Sep and Oct, and the risk and loss on the ahead impounding scheme is calculated and analyzed. Then, the storage level, power production and releasing discharge are achieved by computing on the electricity generation model through reservoir regulation graph. Thirdly, obstruction in channel is analyzed and the problem in the Chongqing reach is more serious in 175-145-155m scheme. The sediment aggrading process and distribution on different schemes is calculated by 1-D reservoir mathematical model. The navigation benefit is computed by navigation model. Based on above calculations, the impounding time is decided by the multi-purpose decision model, and evaluate by analytical hierarchy and balance layout model. A best impounding scheme is achieved to match the requirement of flood control electricity generation and navigation et al.

首先,在对宜昌站9、10月份来水分析的基础上,采用第2章建立的防洪优化调度子模型进行了三峡水库9月份防洪调度,分析了汛末提前不同天蓄水对防洪的影响,计算了汛末不同蓄水方案水库9月份的洪灾风险率和风险损失;接着,根据第2章建立的发电调度子模型进行了三峡水库发电调度计算,得出了不同蓄水方案下水库的坝前水位、发电量及下泄流量过程;然后,分析了175-145-155m方案下三峡水库的碍航问题,指出175-145-155m方案下重庆河段的碍航问题最为严重,通过进行不同蓄水方案下水库一维泥沙冲淤计算,得出了不同蓄水方案下库区淤积过程及分布,并通过航运调度子模型,计算了不同蓄水方案下水库的航运效益;最后,根据以上防洪、发电及航运调度计算的结果,运用第3章水沙多目标决策模型对水库的蓄水时间进行了多目标决策,并采用层次加权均衡规划模型对计算结果进行评价,得到一个能满足水库防洪、发电及航运各方面要求的最佳蓄水方案。

Hence , this article' s background is the western important item of natural foundation " Great Roadway Engineering of Western Mountain and Environment Mutual Action mechanism " and " Xi Pan Highway Geology Disaster Research and Countermeasure "; on the base of widely consulting on the national and abroad literature datum base ; investigating the slope on the Xi Pan highway; discussing some problem of the slope engineering on the Xi Pan highway Based on centrifugal model experiment , What it is to the slope whittles that the slope places the terrace fills the earth counter pressure the this two kinds of prevention and cure steps of engineering has been underway researching initially , main work and fruit as follows :(1) Based on the impersonal sum-up and comparison of all kinds of methods of analysis about slope stability at present, the current research is introduced and the developing trend is discussed in brief.

基于离心模型试验,对削坡放平台、填土反压这两种工程防治措施进行了初步研究,主要的工作和成果如下:(1)在客观总结目前国内外边坡稳定性分析方法的基础上,对国内外边坡研究现状进行简介,对边坡的稳定性分析方法进行了总结、对比。

From the point of practice and dvelopment, how to impove the ability of credit risk management for Yinchuan city commercial bank is discussed surrounding the client raiting and credit extention, measures of credit risk, management strategies of credit risk, conclusions of the paper are listed as the following:Through positive analysis, the current methods of client rating and credit extension is simple and convenient for application, there are four disadvantages in index system of it: non-customer subdivision, non-consideration factors on industrial risks, larger quantitative indicators ratio, non-consideration factors on affiliated enterprise risk, and some corrective measures are put forward to solve it, customer subdivision, factors-added on industrial risks, set stationarity indices ratio in reason, factors-added on affiliated enterprise risk; From the point of development, Based on the technology of Value-at-Risk and CreditMetrics model we discussed the methods of credit risk analysis and measurement and gave the example of how to calculate the VaR value of individual loan and combined loan; This paper probes into the strategies which raise the ability of credit risk management for Yinchuan city commercial bank from five aspects, including strengthen the inner control, improve the technique level of risk management through information technique, solve the problem of non-performing loan, adjust the credit orientation and structure, foster credit culture with its core based on risk control.

从实践和发展的角度出发,围绕客户评级授信、信贷风险测量、信贷风险管理策略三个方面,就如何提高银川市商业银行信贷风险管理水平展开研究,得出以下结论:通过实证分析,银川市商业银行现有的客户评级授信方法具有方法简单、易于推广的优点,但客户评级授信指标体系具有客户分组不细、未考虑行业风险因素、定量指标占比过大、未考虑关联企业风险因素的缺点,应通过细化客户分组,增加行业风险因素指标、合理设定定性指标比重、增加关联企业风险评价指标等措施进行改进;从发展的角度出发,在基于VaR框架和CreditMetrics模型技术的基础上,探讨了银川市商业银行信贷风险分析和度量的方法,给出了采用CreditMetrics模型技术计算单笔贷款、组合贷款VAR值的例子;从五个角度探讨了提高银川市商业银行信贷风险管理能力的策略和手段,包括强化信贷风险内控管理机制、利用信息技术提高信贷风险管理技术水平、综合治理化解不良资产、调整信贷结构、建立以风险控制为核心的信贷文化等对策。

Based on the current ID-based signature and ID-based blind signature, a new ID-based blind signature without trusted PKG was proposed. Meanwhile, a new ID-based proxy signature without trusted PKG was also proposed.

在已有基于身份无可信中心签名的基础上结合基于身份的盲签名提出了一个基于身份无可信中心的盲签名,同时提出了一个基于身份无可信中心的代理签名。

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推荐网络例句

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。