1、

Determining the parameters of quadratic surface or conic section by optimization

用最优化方法确定二次曲面和曲线的参数

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3、

Three expressions of conic section and central force problem

圆锥曲线的三种表示和有心力问题

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4、

The chemical cleaning method of convection section tube for hydrogen manufacturing furnace was recommended.

介绍了制氢炉对流段炉管的化学清洗方法。

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5、

Among some improvement, outside fresh air sends directly to those spots around cooking range and chef breathing section where pollutant concentration is beyond standard can meet oxygen requirement for gas combustion efficiently and dilute pollutant concentration there quickly;

以组合风幕送风方式将室外新风直接送到炉灶周围和厨师呼吸区污染物浓度超标部位,高效率地满足煤气燃烧需氧量要求、快速稀释超标部位污染物浓度;

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6、

A nonlinear programming model for optimizing profile cross section of lined water conveyance canal is presented in this paper.

采用非线性模型,推荐田间混凝土衬砌渠道纵横断面的优化设计方法,且可节省大量投资。

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7、

The doctors removed a section of the mummy and set it to a laboratory. What was the purpose in Moroni taking the plates back?

医生们给木乃伊做了切片送到实验室。摩罗乃把页片拿回去的目的是什麽?

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9、

A circular arch with constant thickness in the horizontal section is defined and its crown contilever has an arbitrary convex curve on upstream face. Such as.

研究对象是水平截面为等厚园拱、拱冠上游面呈任意凸曲线的双曲拱坝。

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10、

The MHD equilibrium solutions of a toroidal plasma with non-circular cross-section and linear current distribution are written in terms of a fast convergent series.

用一个收敛很快的级数构造了非圆截面、线性电流分布环形等离子体的磁流体平衡解。

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11、

The entry convergent flow pattern was observed with flow visualization technique when the resin melt flowed through a die featuring abrupt contraction in cross-section of channel and axial symmetry.

应用毛细管流变仪测量了在接近实际挤出工艺条件下低密度聚乙烯熔体的流变性质;应用流动可视化技术,观测了试样熔体流经突然收缩的轴对称口模时的入口收敛流型。

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12、

Influence of high aspect ratio convergent nozzle with different transition cross-section and nozzle shape on jets mixing characteristics

圆转矩形大宽高比收敛喷管过渡型面及喷口形式对射流掺混特性的影响

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13、
14、

Causes and Solution to Coking in Convection Section of Cracker

裂解炉对流段结焦原因及解决方法

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15、

The convection section simulation program has been developed by using PRO/ ⅱ as a platform.

以PRO/Ⅱ软件为平台,开发了裂解炉对流段模拟软件。

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16、

Design of convection section in cracking furnace

裂解炉对流段的设计

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17、

The Three Assistant Loops Cascade Control of Temperature Modifying Coking Convection Section

温度修正焦化对流段三副环串级回路的控制

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18、

Reason Analysis and Treatment of Vibration in Convection Section

对流段振动原因分析及处理

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19、

Finite element analysis of mechanical features for connecting section of branch hole

分支井连接井段井眼力学特性的有限元分析

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20、

Problem is the most value conical section the key and difficult point for high school maths problem, is generally and other content combine comprehensive problem.

圆锥曲线最值问题是高中数学中的重点和难点问题,一般是和其他内容联合起来的综合题。

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