Tapered end mills for trapeziform runner with parallel shanks 直柄梯形浇口用锥型端铣刀
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The paper presents the trapeziform chart for production line controlled 论文提供了生产线的控制梯形图。
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The subject is space train station : a trapeziform aisle symbolizes transporting in time to show people a time shifting inter - space 以时空车站为主题，一条梯形的逐渐放大时空穿梭走廊迅速铺开，使人感觉进入了一个时空交替的太空展览空间。
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Because the cross - section of the oversized rib waveguide we fabricated by wet - etching was trapeziform , we analyzed the transmission of oversized rib waveguide by combining effective refractive - index method . the influence of some factors on the optical transmission loss , such as material structure , the height of rib waveguide , and the thickness and refractive index of waveguide layer and up - layer of polymer material , was analyzed 因为湿法腐蚀工艺制作的反脊波导横截面是梯形状的，因此论文中采用了一种简单有效的方法，即有效折射率法，对梯形反脊波导的光传输损耗特性进行了分析，同时考虑金属电极产生热场对脊波导传播特性的影响。
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It includes two aspects in content : one is the best choice for plane disposal of pipeline , and its methods follows as decision - making plot , simple trapeziform and optimizing trunkform etc ; the other one is optimizing pipe parameter when the plane disposal of pipeline has been fixed , and the methods of which are linear programming , unlinear programming , dynamic optimizing , direct optimizing , hereditary arithmetic and so on 污水管网优化设计包括两个方面的内容：一是管线平面布置的优化选择；其方法有：决策图法，简约梯度法，优化树法等。二是在管线平面布置已定情况下进行管道参数的优化；其方法有：线性规划法，非线性规划法，动态优化法，遗传算法，直接优化法等。
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After generalizing the characteristic of modern equipment , the mission of equipment management and general situation of chinese equipment management , basied on two forms of equipment management - - - - - - practicality & value , the author combined quantitative & qualitative methods with example to analyze and discuss questions , especially the reasonable update & depreciation , accordingly achieving the optimization of the technical efficiency & economic benefit 0 one of emphases of the thesis is methods application of equipment reasonable update , that is starting with economic benefit to looking for reasonable using fixed number of year . the thesis used inferior - converted numeric method and rate equation which based on the theory square and combined with harbor loading machines & tugboat ' s actual facts , calculated the economic life of the same machine in order to make sure harbor machines " reasonable using fixed number of year . at the same time , the author made use of midpoint value regress method and stochastic trapeziform forecast method to calculate and analyze and gain the reasonable conclusion o the other emphases is questions of harbor equipment 本文概括介绍了现代设备的特点、设备管理的任务以及我国设备管理发展的概况后，作者从设备经济管理的两种形态? ?实物形态和价值形态出发，采取定量与定性相结合，以定量为主，结合实例进行分析与论述，对港口设备的合理更新与折旧问题进行了着重研究，从而实现设备的技术效能和经济效益的最优化。本文研究的重点之一是设备合理更新的方法应用，即从经济效益出发，来寻求设备的合理使用年限。本文结合港口装卸机械和港作拖轮的实际，运用以正方形理论为基础的低劣化数值法和费用方程两种方法，计算了同一种机械设备的经济寿命，从而确定港机合理的使用年限，同时，运用了中点值回归法和随机梯形预测法进行计算和分析，得到了合理的结论。
