Least square method of polynomial or the method based on the given function are used to fit pump characteristic curve in pump selection or operation.
在水泵的选型或运行中，通常采用多项式的最小二乘法或根据假设的函数关系来拟合水泵性能曲线。
Determined that it is very important by comparing the total more accurate pump characteristic curve in the calculation of water hammer protection position.
通过比较确定较准确的水泵全特性曲线在水锤防护计算中有十分重要的地位。
Centrifugal pump characteristic curve on the efficiency of the highest point known as the design point, a pump at the point corresponding to pressure head and flow of work under the most economic.
离心泵特性曲线上的效率最高点称为设计点，泵在该点对应的压头和流量下工作最为经济。
Based on the motion function and characteristic in different modes of water system of air-conditioning, the differential of circulating water volume pump and elevation of pump were analyzed.
根据空调水系统在不同工况下运行的性能与特点，分析冬夏及部分负荷运行时，空调水系统的流量和扬程差异。
Based on the motion function and characteristic in different modes of water system of air-conditioning, the differential of circulatory water volume pump and elevation of pump were analyzed.
根据空调水系统在不同工况下运行的性能与特点，分析冬夏及部分负荷运行时，空调水系统的流量和扬程差异。
Characteristic, working principles of the thermal mass flowmeter and its application in micro gas flowmeter measuring and pump protection are introduced.
介绍了热质量流量计的特点、工作原理、微小气体流量测量及泵保护应用。
The addendum coefficient is an important parameter in the designing the gear, and to affect the discharge characteristic of compound gear pump.
齿顶高系数是设计齿轮时的重要几何参数，也是影响复合齿轮泵流量特性的重要参数之一。
When when mixed proportion exceeds more than 20%, choose this pump, need entering even more to the water conservancy characteristic.
当混合比例超过20%以上时，消防泵则选择该泵时，试压泵需要对水力特性进行更新。
The composition, survey method and design characteristic of the sea water hydraulic pump test stand's hydraulic system are introduced.
本文主要介绍海水液压泵试验台的液压系统组成、测试方法及其设计特点等内容。
The paper introduces the development of the precise metering pump with two \ | way piston for sampling flue gases, its characteristic and applications.
文章介绍了双向活塞式精密气体采样计量泵的研制及其特性和应用。
By taking 135 three-screw pump as an example, the geometric parameter design, the forming of spiral surface and the characteristic of screw gearing are investigated.
以135型三螺杆泵为例，对螺杆几何参数设计、螺旋型面的形成、螺杆啮合特性进行了探讨。
Vibration signal and its characteristic information in the course of running of feed water pump are significant for the state monitoring of the feed water pump system.
给水泵在运行过程中的振动信号及其特征信息对给水泵系统的状态监测有重要意义。
The power produced by BLDC motor and pump is kind used by rotary steering drilling instrument, which has the characteristic of stabilization and easy controling.
前言：电机泵动力作为旋转导向钻井工具导向力的一种，有着动力稳定、 可控性好等优点。
The operating principle and flow characteristic of micro valveless pump were introduced.
介绍了无阀型微泵的特点及其工作原理；
The hydraulic principles of a pulp pump were discussed and a new understanding for the hydraulic characteristic of pump impeller was proposed.
通过阐述浆泵叶轮的若干原理，提出对浆泵叶轮水力特性的认识，并应用于解决实际问题。
The characteristic test of hydraulic pump requires a high response, so it is important to design an appropriate test system for hydraulic pump test.
液压泵特性试验对测试响应时间要求很高，因此建立一种合理的测试系统是非常重要的。
The working principle and structural characteristic of Canned motor pump are briefed, the advantages and disadvantages of this pump are analyzed and Puts forward attentions in type selection.
简要介绍了屏蔽泵的工作原理和结构特点，分析了该类型泵的优缺点以及选型注意事项。
After introduce the operating principle and system characteristic of GEHP (gas engine-driven heat pump), the author discuss the application feasibility in China.
在介绍燃气机热泵的工作原理和系统特点之后，对燃气机热泵在我国的应用的可行性进行分析。
The performance and feature of melt gear pump in the polymer processing was introduced, and the purpose and characteristic of melt gear pump for plastic and rubber extrusion was listed.
介绍了熔体齿轮泵在聚合物加工中的性能与特点，列举了用于塑料、橡胶挤出的熔体齿轮泵的用途和特点。
Through a study in characteristic curve of the engine and hydraulic pump, the matching efficiencies between engine and fixed and hydraulic variable displacement pump were analyzed respectively.
综合发动机和液压泵的特性曲线，分别对发动机与液压变量泵、定量泵进行了匹配效率分析；
For the avoidance of rigidity impact of commutative piston mortar pump in movement, the amendatory CAM mechanism was designed, and the characteristic of movements was analyzed.
为避免互逆活塞式砂浆泵在运动过程中出现的“刚性冲击”，对凸轮机构进行了修正设计，并分析了修正凸轮机构的运动特性。
This implies a pump head-flow characteristic that falls continuously from shut valve to duty point by at least 10%.
这意味着，一个水泵头流量特性属于不断从关闭阀门到责任点，由至少10 %。
Choose the typical equipments and make them into one system model, simulate the switching process between the main oil pump and the AC oil pump, then analyse it's characteristic.
选择具有典型特性的系统部件，构成系统，模拟主油泵与交流油泵切换过程，分析其系统特性。
The running characteristic of oil pipelines injected with depressant (PPD-ed) and pump operating characteristic are analyzed and an operation optimization model for oil pipelines is established.
对加降凝剂原油管道的运行参数和泵站的运行特性进行了分析，建立了原油管道的运行优化模型。
Simulates the thermodynamic characteristic of the air side heat exchanger of an air source heat pump under different air temperature and relative humidity.
用计算机模拟空气源热泵风侧换热器在不同环境温度和相对湿度条件下运行的热力特性。
Performance characteristic and stress condition were analyzed in the process of progressive cavity pump well startup and a startup torque dynamic model was established.
对启动过程中单螺杆泵的运动特点和受力情况进行分析，建立了该系统启动扭矩动力学模型。
Secondly, analyzing statics characteristic of the multi-gear pump demonstrates that radial hydraulic pressure, meshing force and resultant force are balanced on the center wheel.
其次，对多齿轮泵的静力学特性作了分析，证明了中心轮径向液压力、啮合力及总作用力平衡。
It is proved with the example that the new method works well for water pump efficiency characteristic curve fitting.
实例计算表明，采用该方法可以较好地拟合水泵效率特性曲线。
It is proved with the example that the new method works well for water pump efficiency characteristic curve fitting.
实例计算表明，采用该方法可以较好地拟合水泵效率特性曲线。
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