查询词典 basic field

Research the nature of Earth's Physics and training to acquire seismic, gravity field, the Earth tide, the earth's rotation, and magnetic field, to power, plate tectonics and geophysical exploration geophysics, such as the branch's basic theory, observation instruments, methods of observation and data processing methods, able to independently complete a variety of geophysical observation and data-processing tasks, and with certain scientific research capacity of senior specialists.

主要研究地球的物理学性质，培养能掌握地震学、地球重力场、地球固体潮、地球自转、地磁场、地电、板块构造以及勘探地球物理等地球物理学各分支的基本理论、观测仪器、观测方法和数据处理方法，能够独立完成地球物理的各种观测和数据处理任务，并具有一定科研能力的高级专门人才。

Based on Wilson\'s lemma on evenly distributed differences, elementary number theory and fundamental theory of finite field, the finite field construction for strict optimal OOCs is proposed and the basic idea of this construction is investigated. The main steps and flow chart of assistance design by computer are obtained.

3基于Wilson均匀分布差引理、初等数论及有限域的基本理论，提出一种严格最佳光正交码的有限域构造法，对该构造法的基本设计思想进行深入的理论分析，得到该构造法计算机辅助设计的主要步骤及流程。

Potential function in gravitational field is solved through the equation and basic characteristics of gravitational field are studied.

通过方程，求出了引力场中的势函数，探讨了引力场的基本性质。

Maxwell's equations group in fact was already found in the basic experimental laws of electromagnetic phenomena, as well as a single magnetic pole does not exist on the facts and the integrated displacement current assumptions, using an international system of units, these equations can be written as: DivDW =ρ or DW =ρ(1) kiDivBq = 0 or Bq = 0 (2) kiCurlEBq =- Zt or × EqkZ =- BqZt (3) ZCurlHDWDW = jE Zt, or × HW = jE Zkt (4) Z-type in the Curl, and Div were vector operator curl and divergence, Micro-k points for the Hamiltonian operator, in the rectangular coordinate system,= iZZEkx jEy kqz, iE, jE, kq along Zx, y, z-axis unit vector, a vector for any AW are × AW = CurlAW, kAW = DivAW; DW for the electric displacement, Bq for the magnetic induction intensity, Eq, and HW, respectively i field and electric field strength, jY for the conduction current density,ρ the charge density for free.

麦克斯韦方程组实际上是当时已发现的电磁现象的基本实验定律以及单个磁极不存在的事实和位移电流假设的综合，采用国际单位制，这些方程式可写成：DivDW＝ρ或DW＝ρ（1）kiDivBq＝0或Bq＝0（2）kiCurlEBq＝－Zt或×EqkZ＝－BqZt（3）ZCurlHDWDW＝jE＋Zt或×HW＝jE＋Zkt（4）Z式中Curl和Div分别为矢量算符旋度和散度，为哈密顿微k分算符，在直角坐标系中，＝iZZEkx＋jEy＋kqz，iE，jE，kq是沿Zx、y、z轴的单位矢量，对任一矢量AW有×AW＝CurlAW，kAW＝DivAW；DW为电位移，Bq为磁感应强度，Eq和HW分别为电i场和磁场强度，jY为传导电流密度，ρ为自由电荷密度。

In this paper, in order to discuss the effect of high voltage electrostatic field on storage preservation of eggs, eggs were treated under high voltage electrostatic field at 30, 60 and 90 kV/m, respectively, and the pretreatment time was 30 and 60min, respectively. Then the eggs were stored at 13℃. Different preservation performance indexes like egg white Haugh unit, yolk index, total volatile basic nitrogen and sensory changes were determined regularly.

为探讨高压静电场对鸡蛋贮藏保鲜的影响，该试验利用30、60、90 kV/m不同高压静电场分别对鸡蛋进行30和60 min的预处理，然后置于13℃左右的室温条件下贮藏，定期测定鸡蛋的哈夫单位、蛋黄指数、挥发性盐基氮和感官性状的变化等指标，研究高压静电场对其贮藏保鲜效果的影响。

Chapter four (application of chaos in measurement field): In this chapter firstly the sensitivity of initial values and parameters that chaos can be used in the measurement field has been analyzed quantitatively, on this basis, the necessary conditions of chaotic system that can be used in measurement are concluded and presented; then the mechanism of measurement implemented by subsection linear map chaotic system, the coordinating relationship between chaotic output signal and the values being measured , and the precision of system measurement are further analyzed quantitatively . And a chaotic voltage measurement system using DSP is designed. Secondly a basic thought that thesensitivity of chaotic parameters can be used in measurement is presented and simulated. Its theoretical testing circuits are designed.

第四章(混沌在测量领域中的应用)首先对混沌可用于测量领域的初值敏性和参数敏感性进行了定性分析，在此基础上，归纳并提出了可用于测量的混沌系统应具有的必要条件；定量地分析了分段线性映射混沌系统实现信号测量的基本原理、输出混沌序列与被测量间的数值对应关系及系统的测量精度等问题；并以DSP为核心设计了混沌型电压测量系统；其次提出了混沌参数敏感性用于测量的基本思路，并对此进行了计算机仿真及原理性实验电路设计。

Pneumatic"and"ordered (that is to say, air field and ordered movement of the pot seedling) are the two key technologies of the ordered pneumatic throwing transplantation, the two technologies were analysed by ANSYS software on the basis of CFD theory and explicit nonlinear dynamic theories for the first time in China. Some correlative experiments were also carried. The basic characteristics about the air field and the ordered movement of the pot seedling were gained.

在计算流体力学和显式非线性动力分析理论的基础上，本文在国内首次采用ANSYS有限元软件分析了气力有序抛栽的2项关键技术——"气力"和"有序"（即抛栽气流场和钵体苗的有序运动），并进行了相关的试验研究，获得了抛栽气流场和钵体苗运动的基本特性，为气力有序抛栽技术的优化提供了依据。

On the base of applied tech. and system structure, the key tech. are expressed in detail. It includes:Knowledge representation technology: it is described in two stages by "Depictive frame + Rule group"."Depictive frame" is used to reflect the factors concerning question field."Rule group" reflects the son-question in question field; knowledge management system: it is made up of knowledge-base editing component, factor classifying component, knowledge inspecting component and extractive knowledge component; uncertainty reasoning adopt method of elicitation search strategy and data drive controlled by member knowledge. It take reliability of compound proof at first. That can resolve the matching contradiction. Reasoning explanation introduce pre-text and followed method of resolving path. Knowledge discovery component take SLIQ as basic arithmetic. It provides classification model in two stage forms which aim at training suit. That is decision tree and productive rule.

在确定应用技术与系统结构的基础上，重点阐述了本文的核心技术，这包括：知识表示技术，采用"描述框架+规则组"的层次结构，"描述框架"用于描述问题域所涉及的因素，"规则组"反映问题域内的子问题；知识管理系统，由知识库编辑构件、因素分类构件、知识检测构件和知识求精构件组成；不确定性推理机采用启发式搜索策略，元知识控制的数据驱动，以复合证据可信度优先作为匹配冲突消解的策略，推理解释采用预置文本与求解路径追踪的方法；知识发现，采用SLIQ快速可伸缩算法，分类模型用判定树与产生式规则两种形式描述。

Reconnoitre, prove this field shallow soil layer on layer bear the weight of strength and can respond to the request that the top load and leave poaching layer out of shape to the weakness, possess and adopt the shallow basic condition of natural foundation, it is a bar foundation of natural foundation that this field is adoptable.

勘察证明本场地浅层的土层的承载力能满足上部荷载对软弱下卧层变形的要求，具备采用天然地基浅基础条件，本场地可采用的是天然地基条形基础。

That is, the motor winding capacitance in series with the Deputy, due to the role of the capacitor, so that Kim winding current phase ahead of the main winding current in phase 90 °, in accordance with the basic theory of motor learning: When the space two winding axis position is 90 °, and the flow of two windings of the current phase and poor 90 °, its synthesis must be for the rotating magnetic field, magnetic field, so that motor up and running.

这种电动机就是将电容与副绕组串联，由于电容器的作用，使副相绕组中电流的相位超前于主绕组中电流的相位90°，按照电机学的基本理论：当空间两绕组轴线位置为90°，且流入两绕组中的电流相位又差90°时，其合成磁场必为旋转磁场，从而使电机启动和运转。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。