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    The primordial tritium formed in the Earth 4.6 billion years ago already decayed to a negligible level in the Earth history. 3H concentration from any known nuclear reactions has been estimated to be less than 0.01 TU (1 TU means 3H/H=10 -18 ),below detection limit.
    地球深处由已知的常规核反应生产的氚含量小于0.01TU(1TU相当3H/H=10-18),处于探测限以下。 地球深处释放的氚表明其可能来源于核聚变。
    The agent is composed of known knowledge, learning conditions, and learning knowledge, and it has strong extensibility, because it s expressive language is the frame and first-order logic.
    这些方法是由学习Agent来完成的,它由已知知识、学习条件和获取知识三部分构成,采用框架和一阶逻辑表示,因此学习Agent具有良好的扩展性。
    The amplitude and the complex propagation constant of every current mode on interconnection lines were investigated in the third chapter of the thesis, and the method of Generalized Pencil-of-Function was used to estimate the unknown current on interconnection lines.
    文章的第三章主要研究了互连线上电流各模幅度和传播常数的参数提取,由已知的离散电流值,应用广义函数束(GPOF)法提取互连线上电流各个模的幅度与传播常数,并对互连线上未知电流分布进行了预测。
    So estimating the independentsources only from the observation is the task of blind source separation(for shortBSS).
    盲信号分离的任务是仅由已知的观测信号估计传输系统和分离出统计独立的信号源。
    One way is called geometrical method, which establishes meshing equation by differential geometry and meshing theory for obtaining the equation of face gear, and uses digital theory to establish digital tooth surface of face gear.
    一种为几何法,利用齿轮啮合原理和微分几何的知识建立了啮合方程,由已知的直齿圆柱齿轮刀具的齿面求出其加工的面齿轮,利用数值计算方法计算了齿面上点的坐标,并通过插值的方法形成了数值齿面。
    One of the main work in designing a D/A converter is to determine the tolerance of network resistors according to the desired statical performance, or to predict and analysis the statical error of D/A converter for a known resistor network .
    根据要求的静态误差限制值来确定网络电阻的容差,或者由已知电阻网络来预测和分析D/A变换的静态误差,是D/A变换研制工作中的一项重要工作。
    The result 1°K = (1.0000007±0.0000002)K has been obtained by known experimental data;
    由已知的实验数据得出:1°K=(1.0000007±0.0000002)K;
    It is stated that a matrix sequence of n-order A~((K)) (K=1,…, n) and a corre- sponding elementary transformation matrix Eks are constructed from a Known n-order matrix.
    由已知n阶矩阵A构造一个n阶矩阵序列A~(k)(k=1,…,n)以及相应的初等变换矩阵E_(kx),然后利用矩阵的乘法,递推求得A的逆或断定A不可逆。
    In this paper, the mathematical relation between strain fatigue strength distribution and fatigue life distribution is theoretically established by probabilistic approach.
    利用概率论方法建立了应变疲劳强度概率分布与应变疲劳寿命概率分布之间的数学关系式,并根据应变——寿命转换关系,由已知的给定应变水平下的疲劳寿命概率分布求出给定寿命下的应变疲劳强度分布函数,便于进行可靠性分析。
    Countering to the situation which is the most seismic inversion methods based on convolution model and corresponding suppose condition,this paper presents a directly nonlinear extrapolation method based on the presume of nonlinear mapping between well parameters and seismic data,using Elman Local Recurrent Artificial Neural Network to build the mapping model from seismic data to profiles of well parameters (interval velocity,porosity,shale content) trace by trace with the well parameters constrained.
    针对目前大多数地震反演方法基于褶积模型及相应假设条件的现状,本文提出了在假定储层参数与地震资料之间存在某种非线性映射的情况下,以测井作为约束条件,利用Elman局部递归神经网络法,建立地震数据到地层参数的映射模型,将地震数据直接由已知井点向外递推地层速度、孔隙度和泥质含量的方法。
    Unknown displacement and stress field may be determined by known boundary condition.
    由已知边界位移和边界应力直接求出未知边界位移和边界应力,并得出据以计算整个问题域的位移场和应力场。
    The relativistic integral invariants of Birkhoffian systems are studied. The simultaneous variant equations and non-simultaneous variant equations to the relativistic Birkhoffian systems are constructed respectively.
    研究相对论Birkhoff系统的积分与积分不变量的构造,建立相对论Birkhoff系统的等时变分方程和非等时变分方程,由此证明:由已知系统的一个第一积分,可以构造系统的一个积分不变量.
    Based on the principle of structure decomposition of linear systems,a new and effective design method of unknown inputs observer(UIO) is proposed,and a feasible algorithm is presented.
    基于线性系统结构的分解原理,提出一种新的含未知输入的观测器设计方法,利用矩阵分解技术,将带有未知输入的动态系统分解为彼此相互联系的两个系统,它们分别仅由已知输入所作用。
    THE METHOD OF SOLVING ELECTROMAGNETIC PEOBLEM FROM THE KNOWN SOLUTIONS OF THE CORRESPONDING STATIC PROBLEM
    由已知相应的静电静磁问题求电动力学问题的解
    The Effect of Sampling Frequency in Signal Reconstruction from Spectral Magnitude and Some Samples
    由已知幅度谱及部分采样点恢复信号与采样频率的关系
    ABOUT A MEN METHOD OF ACHIEVING ANAJYTIC FUNCTION FROM THE GIVEN HARMONIC FUNCTSON
    关于由已知调和函数求解析函教的新方法
    A new Group on the Basis of known Group
    由已知群构造一类新群
    A Method to Solve another Elastic Conjugate Surface from a Known One
    由已知弹性共轭曲面求其共轭的弹性共轭曲面
    The method of the symplectic Backlund transformation and the Darboux transformation is used to construct new symplectic uniton from a known one.
    引进了辛uniton的概念,通过Bāicklund变换和Darboux变换,给出了由已知辛uniton构造新的辛uniton的纯代数方法。 由此得到了极小辛uniton数的上界估计。
    On the basis this research not only includes the traditional project appraisal theory objective of profit maximization but also develops the new objective of the capability of obtaining satisfying revenue, which forms the synthesis of two dimension aims and makes project appraisal theory developing the analysis of known information into the analysis of general information in theory and turning the single-objective decision into the multi-objective decision.
    在这一理论前提下,既包容了传统项目评价体系的“利润最大化”的目标,又发展了“获得满意收益的把握性”新的目标,形成这两个维度目标的综合,使得项目评价从理论上由已知信息分析发展成全面信息的分析,由单一目标决策发展为多目标的决策。
 

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