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In this paper, material properties of the segment of the porous metal-bonded diamond grinding wheel were researched by finite element simulation. Segments were manufactured according to the design result and their elastic modulus was measured. The key points are as follows: The influence of the porosity on the elastic modulus was analyzed through a finite element method. In the FEM model, the design variable only includes the porosity, and the tetrakaidecahedron model is applied as the microstructure model of porous metal matrix. The corresponding porosity was decided in order to meet the requirement of the elastic modulus.

本文利用有限元软件对多孔金属结合剂金刚石砂轮节块的材料性能进行了数值模拟计算,依设计结果制备了节块试样,并测试了节块的弹性模量,主要内容有: 1、充分借鉴多孔材料结构设计和分析的方法,以十四面体模型为多孔金属胎体的微观结构模型,以孔隙率为设计变量,通过有限元分析,计算出满足一定弹性模量要求的多孔金属胎体的孔隙率范围。

The steel yield of common steel is 118.0% of vanadic steel. Through gathering the operation data of job site, as the program language, VisualBasic6.0 is used to exploit the count software.

该计算软件根据原燃料价格、动力价格和销售价格的变化,可以及时计算出承钢普通矿冶炼和钒钛矿冶炼的最佳比例,为承钢获取最佳的经济效益创造有利的条件。

In this paper, the effects of the rigid body motions and low frequency surface errors on the image quality were analyzed. Quadratic equations were used to build the mathematical model of the Wolter type I and II X-ray telescopes and reduce the computational complexity of ray tracing. With the help of a self-developed optical surface analysis code, the effects of the perturbations of the mirrors on the image quality was analyzed and the growth of the image spot formed by deformed telescopes was calculated, this is important for giving the reasonable fabrication tolerance.

在本篇文章中,详细分析了刚体运动误差和低频表面误差对成像质量的影响;使用空间解析几何学的二次曲面方程建立Wolter I、II型X射线掠入射望远镜镜片的数学模型,降低光线追踪的计算复杂度;借助自主开发的光学仿真软件分析了国内研制的X射线成像望远镜的刚体运动误差和低频表面误差对成像质量的影响,计算出像点艾里斑半径均方根值随误差变化的增长率,对工程上提出合理的制造公差的误差容限有重要的指导意义。

The flow calculator transfers the flow rate, pressure, temperature analogue signal to digital, then calculates the real time flow in standard condition and cumulates the flow.

流量积算仪采集4~20mA 的流速、压力和温度信号,计算出实时的标准状况流量,然后对流量进行累积计算,通过液晶显示屏显示实时流量、累积流量、温度、压力以及历史流量。

By means of FEM the magnetic field distributions of AMB are calculated and the coupling phenomena of AMB are discussed. Intercrossing magnetic force, which is used to weigh coupling degree, is calculated also.

采用有限元法对磁力轴承的磁场分布进行了计算和分析,研究了磁力轴承的耦合问题,针对空间电磁力的分布,计算出衡量耦合强弱的交叉电磁力。

On the project background of Rongzhou Bridge, a half through CFST arch bridge in Yibin crossing Jinshajiang, the optimizing theory is applied to the calculation of the stayed-buckle-cable forces in the process of craning construction of the steel-tube arch segment and construction error adjusting. The calculated optimum cable forces with high precision can guarantee the inner forces and the structuredeformation in safe state, and ensure the line shape of the arch ring in accordance with design requirements as well.

以宜宾金沙江戎州大桥(主跨260m的中承式钢管混凝土拱桥)为工程背景,将优化理论引入到钢管混凝土拱桥拱肋架设和扣索索力调整计算,这样计算出的索力精度较高,既能确保结构的受力状态和变形始终处在安全范围内,又能保证架设和调整后的拱肋线形符合设计期望。

The tracking information is relayed to the master control station in the Consolidated Space Operations Centerlocated at Schriever Air Force base in Colorado Springs. The master control station uses this date to make precise near-future predictions of the satellite orbits, and their clock correction parameters.

追踪的信息都发往位于Clolrado Springs空军基地的'统一宇宙操作中心',这个中心把收到的数据进行计算以更精确的计算出卫星将要行使的轨道和卫星时钟校正参数。

The 3D coordinates of each pixel in the actual space could be represented in the form of point cloud.

根据空间点三维坐标计算的数学模型计算出点的三维空间坐标,最后以点云形式实现物体的三维重构。

Vertical and horizontal distribution of the fuel was calculated from sample plots and tree biomass model, including fuel loading, thickness and height. Based on fuel distribution and wind simulation, fire spread rate, fire intensity, and flame height of surface fire and crown fire were calculated.

根据2000-2006年当地气象数据,确定历史平均最大风速的平均值和主风向,在此背景下对风场进行模拟,进而对地表火和树冠火进行模拟计算,计算出不同类型火发生时火蔓延速度、火强度和火焰高度的分布图。

May calculate the wind pressure through thecomputation pipeline pressure which the air blower needs, then carrieson the shaping to the dust remover as well as the air blower.

通过计算管道压力就可以计算出风机所需要的风压,进而对除尘器以及风机进行选型。

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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。

However, to get a true quote, you will need to provide detailed personal and financial information.

然而,要让一个真正的引用,你需要提供详细的个人和财务信息。