实现

As we need to consume limited resource to achieve the value of life, the maximization of the value of life can be only realized on the crossing point of nondifference value curve and resource restricting curve.

由于人生价值的实现是需要花费资源的，而资源又是有限的，所以人生价值的最大化只有在价值无差异曲线与资源约束线的切点上才能实现。

The thesis can be divided into five parts as follows: First, the structural characteristics of finned-pipe evaporator are analyzed. After selecting suitable microelement controller, the heat-transfer and mass-transfer processes are analyzed for every microelement under the conditions of dryness, wetness and frostiness. Based on previous equations, some parameters of frostiness are confirmed and the frost-growing model is set up under frost condition. Some hypotheses are postulated and with the help of the equation of mass-conservation, energy-conservation and momentum-conservation, the evaporation model which fits in the dynamic simulation is built, which set a solid foundation for system simulation. Second, the starting and stopping behaviors under disturbed condition are analyzed and calculated by using the dynamic concentrative parameter model, which gives some advice to better prescribe refrigeration system and set theoretic foundation for carrying out automatic control of refrigeration system. Third, the normal running process is analyzed and calculated by means of rational matching theory, which gives some advice on how to better understand the parameter change under steady state and the affection of inlet-parameter on evaporator. Fourth, the simulation software with dynamic characteristic is designed, which can be applied to calculate thernio-parameter of cryogen, air humidity and frost thickness under different initial and boundary conditions, and to carry out dynamic simulation under conditions of dryness, wetness and frostiness, at the same time, to achieve detection and simulation at any stage from starting to stopping.

本文的主要内容如下：1对翅片管蒸发器结构特点进行分析，选取适当的微元控制体，就干、湿和霜工况下对每个微元分别进行传热传质分析，基于经验关系式确定霜的有关参数，对于霜工况下的霜生长建立模型，经适当假设，运用质量守恒、能量守恒和动量守恒方程建立适合动态仿真的蒸发器数学模型，为系统仿真奠定基础； 2对蒸发在大扰动下的开、停机过程，运用动态集中参数模型进行分析和计算，为更好地描述制冷系统运行的全过程奠定基础，同时也为制冷系统实现自动控制提供一定的理论基础； 3对蒸发器正常运行过程，运用动态分布参数和参数间定量耦合的观点来分析和计算，为更好地了解稳态工况下各点参数的变化情况及各入口参数对蒸发器动态特性的影响即蒸发器性能对各参数变化的敏感性； 4编写翅片管蒸发器动态特性仿真计算程序，可以计算不同边界条件和初始条件下的制冷剂热力参数、空气温湿度和霜厚度分布场，实现对翅片管蒸发器在干、湿和霜工况下的动态仿真。

In addition to procedures to achieve cubic Bezier curve drawing, but also realized the point, line, round mapping, can be used as learning computer graphics algorithm reference.

程序除实现三次Bezier曲线的绘制，还实现了点，直线，圆的绘制，可做为学习计算机图形算法的参考。

The program is in the cuboid procedures based on their inheritance, to achieve a description of cube.

详细说明：该程序是在长方体程序的基础上实现对其继承，实现对正方体的描述。

This is a realization of the C source animation on screen realization of a cuboid and a fan of beating results, and also joined t...

这是一个用C实现的动画源码，在屏幕上实现一个长方体和一个扇形的跳动效果，并且还加入了声音。

The curium bases on the educational evaluation, by means of IEP and topic teaching to improve the students' abilities of life adaptation.

本课程从教育评估入手，以个别化教育计划的实现为目标，通过综合主题单元课程，实现学生生活适应能力的提高。

It can be seen that besides the realization of the common-emitter gain, thus current amplification, the common-base properties were also improved due to the reduction of the common-base leakage current. We have attributed the improvement of the common-base properties and the realization of the common-emitter properties to the enhancement of the electron injection due to the utilization of the V2O5 interfacial layer.

研究发现，V2O5界面修饰层的引入明显地减小了共基极漏电流，使器件的共基极特性得到了进一步的改善，同时也使器件表现了共发射极特性，实现了电流的放大，我们已经把共基极特性的改善和共发射极特性的实现归功于界面修饰层的引入提高了电子注入的结果。

When signals under test are 单击此处编辑母版标题样式 weak, in order to realize signals transmission especially for long distance, direct current amplification or modulation and demodulation may be adopted.

传感器输出的电信号一般为较低频率分量(在直流至几十千赫兹之间)，当被测信号比较弱时，为了实现信号的传输尤其是远距离传输，的电信号一般为较低频率分量(在直流至几十千赫兹之间)，当被测信号比较弱时，为了实现信号的传输尤其是远距离传输，可，当被测信号比较弱时以采用直流放大或调制与解调。

In the process of researching, the writer points out the development condition of our country current asset of hydropower and some problems existed in the development process basing on the condition of our country's hydropower resources.

由于水能资产价值核算是水能资产价值实现的前提，所以本文对水能资产价值的核算理论做了简单的介绍。在此基础提出了本文的重点研究的内容，即水能资产价值实现问题。

Basing on the speed control and reversing control in hardware control circuit, software control program realized the rectilinear motion and simple curvilinear motion of an omni-directional mobile robot.

软件控制程序在硬件控制电路实现的调速控制和换向控制的基础上，通过编程实现全向轮驱动小车的直线运动和简单的曲线运动。

It seems likely that Kraft will return with a better offer.

看起来卡夫要重新考虑一个更好的出价了。

But he'd rather burn off my feelers and watch me squirm.

可他却放任那个家伙对我为所欲为！