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The research fields are calculus of single variables functions and several variables functions, space analytic geometry, series, differential equation.

通过本课程的学习,使学生掌握一元函数微积分、向量代数和空间解析几何、多元函数微积分、无究级数、常微分方程等方面的基本概念、基本理论和基本运算技能,为学习后继课程和进一步获得数学知识奠定必要的数学基础。

The foundation frame is made of channel beam and angle iron welding, the basic dimension demand of the frame refer to figure 5/6,Channel beam's high isn't strict demand, may use 5 or

基础框架是由槽钢及角钢焊接组成的框架结构,框架的基本尺寸要求见图5/6,对槽钢的高度无硬性要求,可以选用5号或

By means of the non-linear finite element analysis,the defect-free tee under bending moment was researched in this paper.

本文采用有限元分析的方法,在对纯弯矩作用下无缺陷三通进行研究的基础上,详细地研究了单一弯矩及不同比例内压弯矩联合作用时底部减薄缺陷对三通塑性极限载荷的影响。

Then, the steady-state productivity model for horizontal well in gas reservoir is established. On the basis of solving the model, this thesis deduces the binomial deliverabiliry equation by which absolute open flow potential and inflow performance relationship can be gotten and we can forecast the production performance of horizontal well in gas reservoir.

其次,在建立水平气井稳定渗流的数学模型并求得其解的基础上,推导出了考虑地层伤害及非达西渗流影响水平气井二项式产能方程,通过该二项式产能方程可求出水平气井的绝对无阻流量,绘制流入动态关系曲线来预测生产动态。

Moreover, it makes the coefficient matrix of centralized IPM's linear correction equation a block diagonal bordered matrix, which can be decomposed into the constraints equation on internal variables of independent sub-areas and coupled constraints equation. During each IPM iteration, internal variables and coupled variables are solved distributedly; thus distributed algorithm of multi-area ORPF is implemented.

在此基础上,论文将该线性方程分解为相互独立的子区域内部约束方程和复制节点的耦合约束方程,在每次内点法迭代中分布分块求解内部变量和耦合变量,从而实现多区域无功优化的分布式计算。

The traditional BLDCM mathematical model establishment in the electric motor two-phase breakover foundations, in fact the neutral point is hanging, inevitable existence three-phase breakover at the same time.

传统的直流无刷电机数学模型建立在电动机两两导通的基础上,而实际上由于电动机中性点悬空,不可避免存在三相同时导通的情况。

This course focuses on the foundation for chirurgery, common surgical diseases, surgical operations, etc. The objectives of this course are 1 to help students to master the basic theories, knowledge and techniques, the causes, pathogenic mechanism and clinical manifestations of common surgical diseases, and the principles of diagnosis, treatment and prevention of the diseases, 2 to help them get familiar with the indications and contraindications; and 3 to train students of the basic surgical performances outside the classroom and foster their aseptic concepts.

本课程包括外科基础、外科常见疾病、外科手术学等内容,使学生掌握外科学基础理论、基本知识、基本技能;掌握外科常见疾病的病因、病理、临床表现、诊断、鉴别诊断、预防和治疗原则;熟悉手术的适应症和禁忌症,训练学生外科手术学基本操作和培养学生严格的无菌观念。

You inherit your nodeless page from GeneralPage, and Cuyahoga automatically applies the default site template (CSS styles and the structure of the page based on the default template) to your page.

你继承你的GeneralPage无节点页,凯霍加自动应用默认的网站模板(CSS样式和页面的结构默认模板),以网页为基础。

Firstly, this paper researched the mechanism of tubing string vibration when natural gas flows in horizontal well tubing string. Secondly, established whole tubing string undamped and damped vibration system model according as reasonable assumption data of one horizontal well. Apply finite element analysis software to calculate tubing string natural characters, simple harmonic dynamic behavior of stable gas production and nonlinear dynamic behavior. Finally, this paper carried out the safety varied frequency of gas well and the method of vibration reduction.

本文首先从理论和数值模拟研究了天然气在水平井油管柱内的流动诱发油管柱振动的机理,然后在合理假设的基础上结合某水平井数据建立了全井段油管柱无阻尼和有阻尼振动系统模型,利用有限元软件计算分析了油管柱固有特性、稳产简谐动力学响应和非线性动力学响应,针对油管柱振动规律提出了天然气安全调节频率范围和减振措施。

JiSheng electrodeless lamp warranty for five years, the use of ten years; now mainly used in public works road lighting, industrial and mining plant lighting, tunnel lighting, schools, supermarkets, public places, gas stations, places of public infrastructure such as green energy-efficient lighting .

极圣无极灯质保五年,使用十年;目前主要应用于市政工程的道路照明,工矿企业的厂房照明,隧道照明,学校超市,公共场所,加油站,公共基础设施等场所的绿色节能照明。

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推荐网络例句

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。