differential of pressure analysis

The procedure is quasi-Newton and converges superlinearly; in the procedure we use an analytical derivatives as the coefficients .

提出了一个优化量子Ｍｏｎｔｅ　Ｃａｒｌｏ波函数的新方法，与前人的方法相比，它不使用变分原理而是极小化薛定谔方程的剩余量；不按ψ２取样而是按ψ２（ＥＬ─Ｅ）２取样；不用差分而是用分析导数；不使用传统的速降法而是使用一个步长自动调节的下降法，它具有拟牛顿性质，因而是超线性收敛的。

However,the middle and late period of the pressure derivative curve is quite discrete by the direct well test data,which causes considerable difficulties of the interpretation.

但从实际应用情况来看,直接应用测试数据进行解释做出的压力导数曲线的中后期相当离散,从而对解释造成了相当大的困难。

An advanced algorithm to pressure derivative of discrete points is presented.

将Laplace正变换积分数值离散 ,再结合Stehfest数值反演 ,给出了一种改进的离散点压力导数计算方法。

The calculated pressure data are analyzed by log-log analysis of pressure derivative,and the pressure derivative type curves for swabbing well in different heterogeneous oil reservoirs under the condition of constant flow rate are obtained.

对求解压力进行压力及其导数双对数分析,得到了不同平面非均质油藏抽汲井定产量生产压力导数典型曲线。

Pressure Derivative Type Curves of Swabbing Well in Heterogeneous Oil Reservoir

非均质油藏抽汲井压力导数典型曲线

The conductance is a function of the temperature and the pressure.

电导是温度和压力的函数。

Numerical simulation of propeller-induced vibrating pressure on stern

螺旋桨诱导的船尾脉动压力的数值模拟

Diagnosis Method of Well Testing Data--Prime Pressure Derivative to Time

试井资料的诊断方法——压力对时间的导数检验法

Dynamics Modeling and Fuzzy Optimization of Unloaded Parameters of Pneumatic Half-Floating Slideways;

气压半悬浮导轨的动力学建模和卸荷参数的模糊优化

Data Fusion Technique Based on Neural Network for Semiconductor Pressure Sensor;

基于神经网络的半导体压力传感器数据融合技术

Response of Cavity Pressure During Pulsatile Pressure Induced Packing

脉动压力诱导保压过程中的模腔压力响应

The effects of automatic tube compensation combined with pressure support ventilation on respiratory mechanics during spontaneous breathing trial

自动导管阻力补偿技术联合压力支持通气对撤机患者呼吸力学参数的影响

Researching on External Pressure Test Pressure Coefficient of External Pressure Vessels

薄壁外压容器外压试验压力系数研究

Often,pressures from outside sources can cause stress.

来自外界的压力时常会导致重压感。

CNC turret punching press

数控冲模回转头压力机

numerical controlled turret punch press

数字控制回转头压力机

pressure-log time curve

压力-对数时间曲线

an invariable pressure, temperature, amount

恒定的压力、 温度、 数量

The vapor pressure above the mercury column and the specific weight of the mercury change.

为什麽气压计的压力读数，与温度有关?

Rated-locking force is the main die-casting technology parameter of die-casting machine.

合型力是压铸机主要的压铸工艺参数。

Calculation method of pressure field distributed parameter of hydraulic friction pairs

液压摩擦副压力场分布参数计算方法

The Digital Capacitor Instrument Used for Measuring the Pressure (the Differential Pressure);

数字化电容式压力（差压）测量仪表