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The shearing failure of structural plane is considered to be corresponding to the maximum of real contact area, a criterion is given to distinguish the shearing failure of structural plane and a new select method of shear strength is brought forward subsequently; Examine the influence of geometrical features and thickness of weak intercalation on the integrative strength of weak structural plane based on the composing of basic strengths, formative mechanism of shearing plane and failure pattern; and present the quantitative relation between the strength and thickness.

4详细研究了依附型滑动面中的硬性结构面和软弱结构面力学特性和破坏模式,对硬性结构面引入摩擦学中的粘着摩擦理论,着重研究结构面在剪切过程中实际接触面的变化规律,提出实际接触面积的最大点即为强度破坏点,并结合实际数据进行了验证;对软弱结构面则从其基本强度的组成、内部剪切面的形成机理和破坏模式入手,研究了结构面的几何特性、夹层厚度和强度关系对软弱结构面综合强度值的影响,并给出了定量关系式。

It was indicated by the CALPHAD that the solute content at the end point of primary solidification changes synchronistically with the start point, solute content in dendritic arm and the partition coefficient increase with the solid fraction. Simple Scheil equation was shown to be able to calculate the eutectic amount on the base of partition coefficient calculated by thermodynamics, its prediction for the different solutes is self--consistent and agreeable with the CALPHAD. The eutectic amount and SDAS was measured in DC experiment and compared to model value, it was shown that the experimental data are in agreement with the model prediction.

相图计算耦合Scheil模型的计算结果显示, Al--Cu--Zn合金单相凝固结束点的溶质含量与凝固初始点的成分同步变化,溶质含量和溶质分凝系数随凝固过程的进行不断增加;在热力学计算出合金分凝系数的基础上,简单Scheil方程可以计算初生相含量,从不同溶质得到的计算结果是自洽的,并与相图计算耦合Scheil模型的预测值一致;实验测定了不同成分铝合金的共晶含量和枝晶间距,实验数据与模型结果基本一致。

Block point, inductive point and lever are fixed in crust. The whole equipment was placed around the vein just like sleevelet.

利用血液在流动过程中对血管壁压力的差异,设计了阻断点和受压点,两者通过不等臂杠杆连接,固定于包裹囊内,整个装置如袖套式安置在静脉壁外。

A soft sensor modeling of the diesel oil solidifying point on a crude distillation unit is studied. The impact on the solidifying point is analyzed by the process variables.

研究某炼油厂常压塔三线柴油凝点的软测量建模问题,分析过程变量对柴油凝点的影响。

Spiral surface machining. How to form slick curve from data points, define reasonable machining points, find and exclude interference and so on are solved too in this article.

解决了如何由数据点拟合成光滑曲线、确定合理的步距点、找出干涉、排除干涉等一系列求解空间刀具轨迹的关键问题,并且运用VC++、Matlab语言实现了上述算法及仿真加工过程。

The article covers the full research on such aspects as mathematic description, numerical analysis method and their practical applications. The diphase heating surface is divided into a hot water section, a evaporation section and a micro overheat section , the problems of model switching are avoided successfully between subcritical and supercritical working condition in the model of The diphase heating surface, and the model can be used for between subcritical and supercritical working condition without causing the model stiff infinity prick up problem. The mathematical model and dynamic characteristic account is unified and predigested for the diphase heating surface of once—through boiler under subcritical and supercritical pressure, and propose that the working conditions at phase change point could be used as divide criterion between water region and steam region under supercritical pressure, the problems are solved successfully between water and steam phase change point under supercritical pressure.

本文在过程的数学描述、数值分析以及实际应用等方面进行了系统的研究分析,将双相受热面统一划分为热水段、蒸发段和微过热段三段,所建立的双相受热面模型不但成功地避免了超临界工况与亚临界工况间的模型切换,而且消除了由区段划分欠妥所引起的模型刚性无限加剧的问题,统一并简化了超临界及亚临界压力下直流锅炉双相区段的数学模型和动态特性计算,而且提出了利用相变点工况作为超临界压力下划分汽水区域的标准,解决了超临界压力下水与蒸汽的相变点问题。

Delaunay triangulation has been used to partition the selected extrema, then replaces the pixels that not contained in the Delaunay polygon through symmetry principle, which can restrain the variance phenomenon that appeared in the cubic spline interpolation.

利用Delaunay三角剖分方法对选取的极值点进行分划,对不包含在Delaunay多边形内的边界像素采用对称处理,抑制了3次样条插值过程中边界点变异现象。

From the lifespan of relay point of view, a reliability criterion was provided based on dynamic characteristics of anti-forces. Mathematical model of tolerance design with reliability was set up under usage of "stress-strength interference method", taken some critical dynamic characteristics as identification objects such beginning of contact separation speed, speed of collision and gag bit impact velocity. This model showed that lower values of characteristic parameters center and quantitative descriptively relationship between tolerance and product reliability. Multi-objective optimization model of relay tolerance distribution was completed when some factors such as reliability, processing costs and its feasibility into consideration. Based on Analytic Hierarchy Process to determine weight coefficients of various objectives, and usage of simulated annealing, this study performed optimal reliable tolerance allocation of space electromagnetic relay, and then key technology segments were analyzed, accompanying its course measured by controlling chart.

从继电器电寿命的角度,基于动态吸反力特性的配合提出了继电器的可靠性判别准则;在此基础上以触点分离初速度、触点碰撞速度以及衔铁碰撞速度等关键动态特性为判别对象,采用"应力-强度干涉法"建立了继电器可靠性容差设计数学模型,给出了下位特性参数中心值及其容差与产品可靠度之间的定量描述关系;综合考虑可靠度、加工成本及加工可行性等因素建立了继电器容差分配的多目标优化模型,基于层次分析法确定了各目标的权重系数,并采用模拟退火法实现了航天电磁继电器的可靠性容差最优分配;研究了继电器的关键工艺环节,并通过控制图对其过程能力进行了分析。

The phase space reconstruction theory of chaotic dynamic system, in combination of the non-linear reflecting and pan-capacity of neural network, can be used to establish the prediction model; and a kind of new prediction method is suggested to realize the complete tracing of phase point evolution process and to predict "the price nails", whereby improving the prediction accurateness and effectively solving the problem of negative prediction, with the satisfactory results obtained.

采用混沌理论预测系统边际电价针对我国电力市场电价变化特点,利用电价和负荷时间序列的混沌特性,重构准确的电价序列相空间,通过跟踪相空间相邻相点的演化趋势,建立基于快速BP网络的电价预测模型,对我国川渝电网电价进行预测,取得良好效果利用混沌动力系统的相空间重构理论,结合神经网络的非线性映射和泛化能力建立预测模型,提出一种新的预测方法实现了相点演化过程的全局跟踪,对"价格钉"进行预测,提高了预测精度,有效解决了负预测问题,得到满意的结果。

In the process of sequence matching the errors are accumulated. In order to eliminate them, the global error distributing method is proposed based on the wire cloth station foundation. In addition, in order to delete the redundant data and simplify model, the paper proposes the data integration method based on the deleting redundant data on the spatial division in the overlap region.

在序列拼接过程中会产生累积误差,为了消除累积误差,本文提出了基于闭合导线条件的整体误差分配计算方法;此外,为了减少冗余数据、精简建模数据,本文对于拼接后的满足精度的点云数据,提出了在重叠区域先进行空间划分再删除冗余点的数据融合方法并加以验证。

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推荐网络例句

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊!不用提了。提到肉,真是糟透了。

Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.

Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。