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for the present相关的网络例句

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Descriptive statistics is a tool for describing orclass of problems that present great difficulties for the unaided human mind.

推理统计学是一套已定形了的方法体系,它解决的是光凭人脑极难解决的另一类问题。

This text is based on the work that analyse the problem having emerged about large-scale economic affordable residential district of city at the moment, in instance of the patterns in Xi'an. Through investigating living circumstances and building present situation, there are lots of requirement for economic affordable housing in Xi'an. As large requirement for premise, the question about choosing location large-scale economic affordable residential district in city is researched. As time as, it should be refer to the problem which were founded in others cities, then summarize a correct choosing location model for the practical situation, it could determent the location of large-scale economic affordable residential district of Xi'an.

本文以分析现阶段城市大型经济适用居住区产生的问题为依据,立足西安地区,通过调查该地区居民的居住现状以及房地产开发状况,指出经济适用住房在西安地区具有广泛的需求市场,在这种巨大需求量存在的前提下,探讨大型经济适用居住区选址问题,结合现有其它城市大型经济适用居住区中发现的问题与不足,提出一套适合实际情况的选址模式,并且根据该模式分析了西安大型经济适用居住区选址的区位。

Now that my movement is been monitored for me to travel Abroad, I am seeking for your assistance if I can present you as the beneficiary of the call- deposit to the security company for the release of the deposit to your Account or any of your destination as part of the money being owed to you by Durra oil Refinery Company Iraq.

现在,我已经进行了我移动到国外旅行,我寻找你的帮助,如果我能将受益人的存款的证券公司,为的保证金帐户或任何你的目的地的一部分资金由Durra欠你的石油炼制业公司伊拉克。

In the present study, only T2-weighted images were aailable for assessment; T1-weighted images had been taken in the axial plane for measurements of erector spinae muscle size,24 and it was not feasible to also obtain T1-weighted sagittal images.

在我们的研究中,仅有T2加权像被用来进行评定,我们做的轴面T1加权像被用来测量骶棘肌的大小了[24],而同样也获得矢状位的T1加权像是不太可行的。

The present invention relates to a Chinese medicine composition for external application for treating traumatic wound surface.

本发明涉及一种治疗外伤创面的药物组合物,特别是涉及一种以植物中草药为原料制成的治疗外伤创面的外用药物组合物。

Studied present measuring methods" advantages and disadvantages, and presented the necessity and importance of researching propellant transient heat transfer.2.according to 130 and aeronautic 90 rocket projectiles" structure, analysed and acquired physical and mathematical models for propellant transient heat transfer, also designed propellant temperature field simulation units for test.3.acquired discrete transient heat balance equation and temperature calculation program, and gave contrasting curves between experimental temperature values and program calculating temperature values as well as maximum errors and average square root errors between them.4.by programs based on the first class boundary condition, worked out temperature distribution in propellant temperature field simulation units at different time, analysed temperature field distribution law and main elements affecting heat transfer, acquired propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.5.established transient heat transfer mathematical model and temperature calculation program for the third class boundary condition, drew contrasting curves between temperature experimental values and calculation values and gave maximum errors and average square root errors between them, got temperature distribution in the simulation unit at different time and main elements affecting heat conduction, figured out propellant mass weighted average temperature and one at the half position of propellant maximum thickness as well as maximum errors and average square root errors between them.

分析了现有测试方法的优缺点,提出了研究推进剂瞬态导热的必要性和重要性。 2。根据130和航90两种火箭弹的结构,分析得到了推进剂传热的物理模型和数学模型,设计了推进剂温度场模拟实验装置。 3。得到了离散形式的瞬态热平衡方程和温度场计算程序,给出了实验温度与程序计算温度值的对比曲线及其最大偏差与均方差。 4。利用程序求出了第一类边界条件下、不同时刻推进剂温度场模拟装置中的温度分布,分析了温度场的分布规律和影响传热的主要因素,求出了推进剂质量加权平均温度和最大肉厚1/2处的温度时间曲线并给出了两者之间的最大偏差与均方差。 5。建立了第三类边界条件下的瞬态导热数学模型和温度计算程序,求出了温度实测值与计算值的对比曲线并给出了两者之间的最大偏差与均方差,得到了不同时刻温度场模拟装置的温度分布与影响导热的主要因素,求出了推进剂质量加权平均温度和最大肉厚1/2处温度及两者之间的最大偏差与均方差,讨论并确定了能代表130和航90推进剂温度的特征点的位置。

Before you can move in for the kill by kissing and/or sleeping with her, you MUST first have a regular, healthy amount of touching that works both ways: she flirtatiously puts her hand on your knee, you encircle her waist with your arm and pull her a little closer - whatever form the physical contact takes, it has to be present for you to achieve your final goal of actual seduction.

在你想到达吻她或者跟她睡的阶段,你必须首先有一个常规的、健康的量的接触通过以下两种方式:她随意的把她的手放在你的膝盖上,你用手环住她的腰,将她拉近——不管你做什么肢体接触,都将帮助你达到引诱的最终目的。

In general, the design work with traditional measures is done by hand, which cannot meet the needs of the technology and manufacture. So the author has developed a CAD hydraulic design software fit for lower specific speed axial flow runner, which is easily operated by users.The main research work of this paper is as follows:1 Analyzing the main reason of axial flow power station cannot work well under littler volume of flow in some season and putting forward an improving scheme, pointing out the characters of design under abnormal factors.2 Combined with the development of the industry in our country, the abnormal hydraulic design method of propeller turbine is discussed based on present literature, data and experiment results.3 Guided by the design method of software engineering, a suit of hydraulic design software of Lower Specific Speed Axial Flow Runner is programmed by the object-oriented programming language Visual Basic and a straightforward, concise and standard Windows human-computer dialogue interface is designed for the system, which makes the operation of the system very convenient.4 ActiveX Automation technology is adopted as the interface with AutoCAD and the hydraulic drawings are edited, modified by AutoCAD until hydraulic model drawings according with the demand of engineering practice are output.5 To resolve practice problem, the author has designed a lower specific speed axial flow runner for Duowa Power Station through an example.

论文的主要内容有:1 深入分析很多轴流定桨式水电站枯水季节小流量下不能发电的主要原因,提出减容改造方案,并指出超常规条件下的改造设计特点。2 结合国情及行业发展需要,参考现有资料、文献和前人的研究成果,进行低比转速轴流式转轮叶片水力设计方法的研究,对轴流式转轮叶片的奇点分布法水力设计进行了全面的探索,结合现代计算机技术,找到了一种针对特殊条件的轴流式转轮叶片水力设计方法。3 仔细比较多种AutoCAD二次开发工具后,结合本课题的特点,选用Visual Basic语言,综合应用软件工程的设计思想,进行低比转速轴流式转轮叶片水力设计软件的编制,为系统设计了直观、简洁和标准的Windows人机对话界面,便于用户操作;编程时在考虑到设计条件特殊性的同时,尽量做到程序的通用性,使之可用于解决同一类问题;另外,大部分程序还可移植到普通轴流式转轮叶片水力设计中,具有良好的适应性。4 利用ActiveX Automation技术与AutoCAD接口,对AutoCAD进行二次开发,在AutoCAD下实现水力图的自动生成和编辑,直至输出符合实际工程要求的木模图。5 通过算例,为多哇水电站设计了一个低比转速轴流定桨式转轮,解决其在枯水期小流量下不能发电的问题。

The paper consists of four chapters:In chaper 1, we introduce the background and signficance, research and actuality on oscillation of functional partial differential equations; we present research subject in this paper;In chaper 2, we discuss oscillatory property of systems of parabolic differential equations with delays and obtain necessary and sufficient conditions for the oscillation of their solutions; we show the difference between oscillatory property of systems of parabolic differential equations with delays and that of systems of partial differential equtions without delays; we explain the main results with examples;In chapter 3, we discuss oscillatory property of systems of functional parabolic differential equations of neutral type; we obtain some sufficient conditions for the oscillation or full oscillation of their solutions under some conditions; we explain the main results with examples;In chapter 4, we discuss oscillatory property of systems of functional hyperbolic differential equations of neutral type; we obtain sufficient conditions for the oscillation or full oscillation of their solutions under some conditions; we explain the main results with examples.

全文共分四章:第一章简要介绍了泛函偏微分方程的振动的背景和意义、对其研究的简单历史和现状,给出了本文的主要研究对象;第二章讨论了一类时滞抛物方程组解的振动性质,获得了判断其所有解振动的一个易于验证的充要条件;指出了这类具有时滞偏差变元的抛物方程组解的振动性质和不具有时滞偏差变元的抛物方程组解的振动性质的差异;并举例对主要结果进行阐明;第三章讨论了一类中立型抛物方程组解的振动性质,获得了在给定的条件下其所有解振动或全振动的若干充分条件;并举例对主要结果进行阐明;第四章讨论了一类中立型双曲方程组解的振动性质,获得了在给定的条件下其所有解振动或全振动的若干充分条件;并举例对主要结果进行阐明。

At present, it has provided perfect and professional services for many companies, enterprises in Beijing, Tianjin and other areas, especially for the image-building in electric industries.

目前,已成功地为京津两地及全国各地区的众多公司、企事业单位提供了完美的专业服务,尤其是为电力企业的形象推广提供了全方位的"闭环式"服务。

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She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了,但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场,你等着挨绳子吧!

Several theories about reigniting and extinguishing of the arc have been refered.

本文综合考虑了几种电弧重燃和熄灭理论。