1、

Discussion about using the hydraulic pump of constant pressure and variable flow rate

使用恒压变量泵液压能源有关问题的探讨

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3、

the premise, variable and policy meaning of china's rural surplus labor flow

对托达罗模型前提、变量及政策含义的新思考

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4、
5、

Control methods for variable condenser water flow in air conditioning systems

空调冷却水变流量控制方法研究

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6、

In hydraulic systems, the flow rate of the fluid may be considered as a through variable, and the pressure causing the flow may be the across variable.

在水利学系统中,流体的流速可考虑作流通变量,而引起流动的压力可考虑作跨接变量。

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7、

It also gives out a variable coefficient density compensation formula used for measurement of mass flow of the low pressure saturated steam, and the features of this formula.

给出了一个用于低压饱和蒸汽质量流量测量的变系数密度补偿式和该补偿式的特色。

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8、

The factors that influence the whole efficiency of ventilating system adopting adjustment to variable air mass flow and friction were investigated.

对采用变流量、变阻力调节式通风系统整体效率的影响因素进行了探讨。

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9、

the models include the following components: the continuation equation of water flow in rills of variable width based on mass conservation;

模型包括根据质量守恒原理推导而得到的变沟宽水流连续性方程和泥沙运移方程;

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10、

Thus, elements flow brings gluttony to various sectors and lead to the transformation of the industrial structure, the optimization and upgrading of industrial structure has become the endogenous variable for modern economic growth.

由此可见,要素的流动带来不同产业部门的此消彼涨,导致产业结构的转换,产业结构的优化升级己成为现代经济增长的内生变量。

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11、

This paper analyses the flow characteristics of the variable axial piston pumps through flow pulsation resource, putting forward a method to reduce the reduction of pressure pulsation and the test result of a pump.

分析了变量轴向柱塞泵的流量特性,从该类泵流量脉动源出发,提出了减少泵压力脉动双幅值误差的方法.给出了该类泵减小压力脉动的数学模型及某泵的试验结果。

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12、

A two dimensional mathematical model for ingot solidification has been established and new methods such as revised temperature recovery method, mean boundary radiation thermal flow and variable time-step length by zone have been applied in this paper.

本文建立了钢锭冷凝过程的二维数学模型,采用了修正温度回升法、平均边界辐射热流、分区变时间步长等新方法。

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13、

Numerical Simulation of Inner Flow Field of a Pintle Injector Variable Thrust Rocket Engine

针栓式变推力火箭发动机内流场数值仿真研究

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8D large-sized centrifugal fan was conducted in three respects: outlet throttle regulation, flow-guide regulation and variable speed regulation. Noise characteristic curves under off-design conditions were obtained.

8D大型离心式风机分别进行了出口节流调节、导流器调节和变速调节3种方式下的噪声特性实验研究,得到了变工况下的噪声特性曲线。

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15、

Energy Saving Analysis and Control of Frequency Conversion Variable Water Flow System

变频变流量系统的节能分析与控制

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Secondly, this paper create a new variable that the cross-variable of free cash flow and EVA performance evaluation, to test if EVA performance evaluation system can governance the earning management phenomena by supervision the abuse of free cash flow.

其次,本文在研究模型中创新性的引入了自由现金流与EVA业绩考核的交叉变量,研究EVA业绩评价体系是否能够通过对自由现金流使用的监管而对央企的盈余管理现象产生治理效应。

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17、

Dynamic Analysis of Thermodynamic Stability in Variable Water Flow HVAC System

变流量空调水系统热力稳定性动态分析

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18、

The effects of cell temperature, cathode pressure and oxygen flow rate on the dynamic response of a liquid feed direct methanol fuel cell under variable loading cycles were investigated experimentally.

在不同负载下,实验研究了电池温度、阴极侧压力及氧气流量对液相进料直接甲醇燃料电池动态响应的影响。

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19、

In this paper, we describe the static and dynamic characteristics of steady flow variable vane pump, and compute the average regulative inner force on this pump, then put forward how to determine the structure parameters rationally.

对稳流式变量叶片泵的静、动态特性及其调节内力进行分析与研究,提出合理确定泵的结构参数的方法。

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20、

In order to analyze the influence on continuation power flow calculation by change of line resistance, this paper presents the electro-thermal power flow model and electro-thermal continuation power flow model in which the line resistance is considered as state variable of power grid.

为分析其对连续潮流计算产生的影响程度,本文提出将输电线路电阻作为潮流的状态变量,首先建立包含电阻参数的电热耦合潮流模型,并进一步提出电热耦合连续潮流模型。

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