查询词典 constant field

This article analyses the application conditions of freezing method, current research status and the problems in thisiold. It, points that it" s necessary to study deep freezing temperature field deeply and discusses the factors which influence the freezing wall such as soil" s nature, moisture content, geological conditions, etc. It introduces the theory, process of freezing method, the distribution of temperature field of freezing method and key thermotics parameters influencing freezing temperature field, it simplifies the deep freezing temperature field model. Through ANSYS, this article founds the deep freezing temperature field model, and simulates the field on vary heat conductivities. It analyzes the results of ANSYS simulation, gains the theoretical value of thermometric holes which is needed by back analysis. Using the simulation temperature and actual value, it gets the equivalent heat conductivity. Then it solves the deep freezing temperature field by the equivalent value, simulates the freezing wall development process and temperature change curve. Against the actual project, the results are favorable.

文中分析了冻结法施工的应用条件，目前对冻结法施工的研究现状和在此领域内存在的问题，指出了对深土冻结温度场进行深入研究分析的必要性；对影响冻结壁形成发展的因素如冻土土性、含水量、地质条件及施工方法等因素进行了论述；对冻结法施工的原理、过程，冻结法温度场的分布情况，影响冻结温度场分布的主要热学参数进行了综述；对深土冻土温度场模型进行了合理的简化，通过ANSYS大型有限元分析软件，建立了深土冻结温度场的模型，对不同导热系数情况下的深土冻结温度场进行了模拟；对ANSYS的模拟结果进行了定性的分析，通过对ANSYS结果的后处理取得了反分析时需要用到的测温孔理论温度值；经过对测温孔模拟温度值和实测温度值的分析，得到了冻结温度场的等效导热系数；使用等效导热系数对深土冻结温度场进行了求解，模拟了冻结壁发展情况和温度场中的温度变化曲线，用所得结果对比工程实际情况，取得了较好的效果。

The introduction of torsion field can be included in a new meaning to the concept of physical vacuum . All kinds of fields (electromagnetic field, gravitational field and torsion field) can be regarded as the behaviors of physical vacuum under different polarized conditions. If one charged particle in vacuum spins to lead to the charge polarization of the vacuum , it takes the form of electric field ; if the move source is mass, by which the spin leads vacuum to the vertical polarization, it takes the form of gravitational field; If the spin is self-spinning to lead vacuum to the horizontal polarization, it takes the form of torsion field.

挠场的引入从最基本的层次上可以纳入对物理真空这一概念的新的理解上；各种场都可以看作为物理真空在不同极化条件下的表现；如果一个带电粒子存在于真空，作为一种挠动，使物理真空被电荷极化，就表现为电场；如果这种挠动源是质量，物理真空在质量的挠动下引起真空的自旋纵向极化，就表现为引力场；如果这种挠动是由于物体的自旋引起的，那么，真空被横向极化，就表现为挠场。

NA, or the amount of contact some of the macro (such as the Faraday constant F, gas constant R, etc.) and micro-volume (such as the elementary charge e, Boltzmann constant k, etc.) of the relationship between a fundamental constant: F = NAe, R = NAk, etc..

NA还是联系某些宏观量（如法拉第常量F，气体常量R等）与微观量（如基本电荷e，玻耳兹曼常量k等）之间关系的一个基本常量：F＝NAe，R＝NAk等。

This design separately uses series linear constant voltage circuit, series regulate constant current circuit and the feedback type contravariant circuit to design direct current constant voltage power supply, direct current constant current power supply and DC-DC converter.

本设计分别用串联型线性稳压电路，串联调整式稳流电路和反馈式逆变电路设计直流稳压电源，直流稳流电源和DC-DC变换器。

A sound style rule bars the instructions of a program from using any numerical or textual constant directly; instead, they rely on symbolic names, and the actual values only appear in a constant definition (constant in Pascal or Ada, preprocessor macros in C, PARAMETER in Fortran 77, constant attributes in the notation of this book).

一条合理的规则禁止把任何数字或本文常数直接地使用在程序的指令中；而是依赖于符号名，并且真实的数值只在一个常数定义中出现Pascal或Ada的常数(constant，C的预处理程序宏， Fortran 77的叁数，在本书符号中的常数属性。

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In the first part, we discuss the properties of solutions of (0.1) system with dif-ferent diffusion coefficient and the second boundary condition. The stability of non-negative constant solutions is given, some prior-estimate of the positive steaystateare proved by using the maximum principle and lower-upper solutions, the non-existence of non-constant positive solution, the global exitence of non-constant pos-itive solution and bifurcation solution of non-constant positive steady-states areobtained.

第一章讨论了系统(0.1)在扩散系数不相同的情况下非负常数解的稳定性，运用极值原理，上下解方法确定了系统(0.1)正平衡态解的一些先验估计，然后讨论了非常数解的不存在性，非常数正平衡态解的全局存在性及非常数正平衡态的分歧解。

The stable and constant control system of semiconductor laser diode includes constant current control, constant power control and constant temperature control.

半导体激光器稳恒控制系统包括恒电流控制、恒功率控制和恒温度控制三个方面。

This paper reviews the kinetic mechanism of acetylcholinesterase, illustrates the principle and application of the kinetic parameters such as Michealis-Menten affinity constant Km, maximum reaction velocity Vmax, turnover number Kcat, bimolecular rate constant Ki, affinity constant of the inhibitor for the a ctive site Ka, phosphorylation or carbamylation rate constant K2, and discusses the potential practical application benefiting from the study of the kinetic analysis.

综合评述了AChE的动力学机制的发展状况，着重介绍了米氏常数Km、最大反应速率Vmax、转换率Kcat、双分子速率常数Ki、抑制剂化合物对AChE活性部位的亲和力常数Ka、磷酸化或氨基甲酸化速率常数K2，这些动力学参数的原理及其应用状况，探寻了动力学机制将带来的实际应用。

In part two, Writer analyses the electric field with catalyst theorically. The results show: The most intensive electric field of pellets in the electric field occurs at the two ends along electric field, and the larger the dielectric constant, the more intensive the electric field.

第二部分，对有催化剂情况下的电场分布进行了较为详细的理论分析，结果表明：电场中的催化剂小球表面沿电场方向两端部场强最强，并且表面场强随催化剂介电常数的增加而增加。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。