基本参数

The basic idea is as follows: first, a kind of plane α-B-spline interpolation curve with a shape control parameter a is constructed; then, by converting the first derivatives of the curve into Bernstein polynomial, the positive conditions of Bernstein polynomial can be used to get the necessary and sufficie nt conditions for the monotonicity of α-B-spline interpolation curves, i.e., the range of the parameter a. Therefore, monotone-preserving interpolating curves can be obtained succinctly.

其基本思想是：首先构造带有形状可调参数的一类平面(-B样条插值曲线，再把其一阶导矢的两个分量分别转化为Bernstein多项式，从而利用Bernstein多项式的正性条件，得到此曲线为单调的充要条件，即形状参数的取值范围，简单、快捷地实现此参数样条曲线的保单调插值。

Based on description method of damping motion in mechanical vibration, variables movement of generator are divided into two basic motion models: damping oscillation and critical damping motion. Detail methods of extracting damping parameters from simulation data is introduced to establish variable motion models. An approximate method is put forward to simulate low-frequency signal and generator response characteristic, from which motion models and damping parameters of main variables are obtained. The influences of oscillation amplitude, frequency and initial operating point of power system to the motion damping parameters are analyzed.

借鉴机械振动中阻尼运动的描述方法，将低频振荡下发电机主要变量的运动归纳为阻尼振荡和临界阻尼两种基本运动形态；介绍了从仿真数据提取阻尼参数建立参数运动模型的方法，实现对发电机振荡特性的量化分析；提出一种系统侧低频振荡信号的近似模拟方法，并应用于发电机响应仿真，获得了主要变量的运动模型和阻尼参数；分析了系统侧振荡幅度、频率以及初始工况对发电机功角振荡的影响。

This is an all wheel disk type mechanical games most basic parameter, is also game engine room boss the doctor leaves the core parameter which parameters and so on fraction need to change.

这是所有轮盘式游戏机最基本的一个参数，也是游戏机房老板调节机器出分率等参数所需要改变的核心参数。

In this article two functional modes of the Fly-back Converter (Continuous Conduct Mode and Discontinuous Conduct Mode) are particularly analyzed, which include their characteristics, applications, the critical pattern of two functional modes is argued, both the exact boundary from the angle of circuit parameters is crystallized, at the same time, basic principle of PFC under the DCM mode is introduced, which settle theoretical basis for the subsequent design; by establishing the mathematic model of the converter, a further investigation of the configuration is made, qualitatively and quantitatively, analyzed to settle exactly theoretical basis for the subsequent emulation and the experimental parameter; from the angle of steady-state analysis, the transfer function of the system is deduced to establish dynamic small-signal state equation, emulating the system with the help of matlab, then according to the simulation result and the theory of PFC revise the system, lastly, we adopt the project which add a zero-pole compensator to the voltage loop, by this way, a satisfied system performance is gained and the PFC scheme is ensured successfully; finally, based on the previously-done work, we combining with the situation of specific design requirement, acquired the numerical value of each unit devices in this converter

详细分析了反激式变换器的两种工作状态，连续模式(Continuous Conduct Mode ，简称CCM)和断续模式(Discontinuous Conduct Mode，简称DCM)以及各自的特点、应用场合，论证了两种工作状态的临界模式，从电路参数的角度明确了二者的界限，同时还介绍了DCM模式下PFC的基本原理，为后面的设计奠定理论基础；通过对整个变换器系统建立准确的数学模型，对此变换器的电路结构做了进一步的研究，定性、定量地分析了变换器各部分的工作状态，为仿真和实验参数的确定以及电路参数的优化提供理论依据；从稳态分析的角度，为系统建立了动态小信号状态方程并推导出系统的传递函数，利用matlab对系统进行仿真，进而根据仿真结果以及PFC的相关理论对系统进行校正，采用在电压环加入零点—极点补偿器的设计方案，得到了满意的系统特性并且保证了PFC的顺利实现；最后，在前面所做工作的基础上，结合设计要求计算出此变换器系统中每个元器件的数值，利用Pspice对其进行了仿真、优化，然后根据仿真结果搭建了硬件电路。

Starting from the signal of pressure and temperature, this paper does a series of theoretical and experimental researches on the following topics: the fundamental theory of the thermal parameter method, its field of application, the choice of diagnostic signal, the choice of the technologies on analysis of the signal, the foundation of the database of the fault samples, the application of the artificial nerve net technique and the error analysis of the experimental systems.

本文以参数法中的热力参数为研究对象，以压力、温度信号为研究信号，就热力参数法的基本原理、适用范围、诊断信号的选择、诊断信号分析技术的选择、故障样本库的建立、人工神经网络技术的应用及实验测试系统的误差分析等一系列问题展开了较深入系统的理论和实验研究。

First, the algrithm classify the measurement characteristics as point, line and surface which can be classified to conicoid and free surface. Then, this algorithm establishes the parametric equation according to various features. After that this paper brings forward the characteristic parameters utilising least square method with several characteristic points. Finally high precision probe radius compensation is carried out according to the features.

该算法首先把测量特征分为点、线、面3种基本特征（其中面特征又分为二次曲面和自由曲面），然后建立各种特征的参数方程，利用测量得到的少量特征点，采用最小二乘法拟合得到被测特征的参数，最后根据被测特征参数进行高精度半径补偿。

Secondly, three types of radiotelemetry capsule antenna were proposed based on 3D digital body model and FDTD method. Finnally, radiation characters of the line gyral antenna at the four representative locations of the alimentary canal were studied.

基于人体的三维数字模型和FDTD算法，设计三种适用于生理参数遥测胶囊的天线：法向螺旋天线、长方体天线和回旋式线型天线，并给出了这三种天线的几何参数和基本性能参数。

In the formulas of stochastic input and output, when the coefficient of direct consumption and final demand are exponentially distributed, the interrelationship between parameters of stochastic variables can be divided into three types: all the parameters are the same; parameters are inequivalent to each other; some of the parameters are the same, but the rest are inequivalent to each other.

在随机投入产出方程中，当直接消耗系数和最终需求为指数型随机变量时，方程中随机变量分布中参数间的关系有3种基本情况：所有参数都相等、所有参数两两不相等、有部分相等而其余则两两不相等。实际上，前2种情况是第3种情况的特殊形式。

Strip limit minimum rollable gauge and minimum rollable gauge considering productivity are analyzed and derived using new rolling pressure model, work roll surface temperature rise formulae is derived on the basis of mill stand thermal balance. The affecting factors of work roll surface temperature and the influences on the choice of roll size are discussed.

本文从轧机结构设计、力能参数计算、强度设计计算等方面综合论述了辊系参数设计计算的基本理论，在理论上提出了采用考虑粘着摩擦的混合摩擦模型和考虑轧件的弹性变形计算冷轧薄板轧制压力的方法，推导并以冷轧机实测轧制压力验证了轧制压力新模型；应用新的轧制压力模型分析并推导了轧件极限最小可轧厚度和考虑生产率的最小可轧厚度公式；根据工作机座热量平衡原理推导了工作辊温升公式，分析了工作辊温度的影响因素，研究了工作辊温升对轧辊参数选择的影响。

Characteristics of parametric design and implementation approach for parametric database establishment based on redevelopment of Pro/program is expiated and an actual case is presented.

介绍了参数化设计的基本原理，阐述了Pro/E参数化设计的特性及基于Pro/program二次开发实现参数化建库的方法，并给出了实例。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。