Planetary scientists can determine a rock's age by calculating how many radioactive "parent" isotopes of a particular element have decayed into "daughter" isotopes.
行星科学家们可以通过计算一个特定元素有多少“母亲”放射性同位素衰变为“女儿”同位素来确定岩石的年龄。
To recap, the instance includes a row element for each row of the grid, and square elements that help to emulate rows for calculating the 3x3 squares on the grid.
回顾一下，实例为表格中的每一行都提供了一个row元素，另外还包含一个square元素用于为计算表格中的3x3方块模拟行数据。
Specifically, a resource child element for the XForms submission element that will allow a URI to be used for dynamically calculating the submission based on instance data.
具体来说，就是为XFormssubmission增加一个resource子元素，允许用它所包含的uri来根据实例数据动态计算提交。
When calculating the wattage capabilities of a Element, the unit of watts output per unit of radiating surface area is used.
当计算其能量时，要用到每单元辐射面积的输出功率。
In finite element simulation of cutting course, correct predigested model not only may improve precision of calculated result, but also can smartly reduce calculating time.
对于切削过程的有限元模拟分析，正确的简化模型不仅可以提高计算结果的精度，并且可以大大的减少计算的时间。
The singular integration will affect the precision of the result while the Boundary Element Method (BEM) is used in calculating sound radiation.
边界元法应用于计算辐射声场时，由于奇异积分的存在，会影响到计算结果的精度。
By some cases the finite element method has improvement at calculating precision by a long way, and it is a kind of comparatively perfect method.
通过实例计算表明，有限元法在计算精度上有了大大的提高，是一种较为完善的方法。
The formula for calculating transient temperature field in pulse reactor fuel element is derived with lumped parameter models.
采用集总参数模型，推导了脉冲堆燃料元件瞬态温度场的计算公式；
The principles of point - matching and boundary element methods in calculating electric field are introduced in this paper. Two examples are presented. Some results and comparison are given.
本文介绍计算静电场的边界配点法和边界元法的基本原理，同时对电场的两个实例作了计算并加以比较。
The wave pressure is one of important loads in sluices design. The calculating methods of wave element influence the magnitude of wave pressure.
波浪压力是水闸设计中必须考虑的荷载之一，选择较为合适的波浪要素的计算方法，直接影响着波浪压力的大小。
A numerical model calculating displacement of jointed slab on void foundation is established with finite element method.
用有限单元法建立了可考虑接缝和地基脱空的弹性地基板位移计算模型。
When calculating the whole, sheared fastener are simulated by two — dimension fastener element.
在总体计算时采用二维紧固件元来模拟受剪紧固件。
We express the characteristic of water change based on the Landscape exponential calculating of water element.
并对水域要素的景观指数计算来反映水域的变化特点。
In this paper, the special cylindrical element method is discussed in calculating oil well case potential distribution to shorten computer operation time.
采用特殊的柱面单元及算法计算油井套管表面的电位分布，节约了机时，缩短了计算周期。
Based on random rail roughness and vehicle-bridge coupling element, a method is proposed for calculating random vibration of long span Bridges under moving vehicles in this paper.
基于随机轨道粗糙度和车桥偶合单元，提出了大跨桥梁移动车辆荷载作用下随机振动的计算模式。
In this paper, an IBEM (Indirect Boundary Element Method) is presented for calculating permanent magnet field, and the formula of calculating magnetic field intensity is deduced.
本文提出用间接边界元法计算任意界面的永久磁铁所产生的空间磁场，推导出其磁场计算公式。
The conventional formula for calculating Zinc-Equivalent of element which was criticized in that paper is correct, and the proposed formula is not proper.
指出目前公认的但被《商榷》所指责的锌当量计算公式是正确的，而他提出的新的计算公式反而是不恰当的。
Meanwhile, by some examples studied, the reasonable range of stiffness coefficient has been obtained during the discrete element calculating.
同时，本文还通过算例分析，得到离散单元的计算中块体的刚度系数选取的合理范围。
Based on the theory of block element method and calculating model, this paper suggests a calculating model for block element method with effect of reinforcing steel bar considered.
依据块体单元法的理论和计算模型，提出了考虑钢筋作用效应的块体单元法计算模型。
This paper describes the operation principle of a simple phase sequence relay, its parameter calculating method, and the correlative relationship and optimization problem on element parameters.
本文阐述了一种简单的相序保护器的工作原理及其参数计算原则，讨论了元件参数之间的相对关系和优化问题。
The computing result shows that it is very pretty to use this algorithm in the follow finite element calculating.
计算结果表明，使用本文的剖分算法进行后期的有限元计算是十分理想的。
In this paper, the finite element model for calculating interference fit stress is formed by using displacement continuous condition and equal value of force condition on the fitting faces.
本文利用互相配合的弹性体配合表面上位移连续条件及力的等值条件建立了计算过盈应力的有限元模型。
Target moving element is given through calculating sonar data, then its kinematic rule is imitated with uniform straight line motion.
目标运动要素可通过解算声纳数据而获得，用匀速直线运动来模拟目标运动规律。
A finite element method is presented for the calculating natural frequency of turbogenerator stator end windings.
本文提出一种计算汽轮发电机定子绕组端部振动固有频率的有限元方法。
The cutter's design method, including parameter design and modeling, stress analysis and calculating, finite element analysis and correcting was introduced in detail.
详细介绍了铣刀的设计方法，包括参数设计与建模、受力分析与计算、有限元分析与校正。
The application of finite element method in torsion calculating of deep hole drill is introduced.
介绍了有限元法在深孔钻头扭转计算中的应用。
Calculation of brake bottom of drum brake by use finite element method for stress. according to calculating result, studied that stress is distributed over brake bottom.
对汽车鼓式双向自增力式制动器底板进行了有限元计算，在此基础上对制动器底板的应力分布进行了分析研究。
Based on first-order optimization calculating theory, authors established the optimal finite element model of swivel construction of arch bridge adopting hydraulic sync elevation technology.
根据一阶最优化计算理论，构建了采用液压同步提升技术进行转体施工拱桥的优化有限元模型。
By using ANSYS as the software of finite element analysis, a model is set up for calculating finite element of pile foundation with lateral load.
运用ANSYS有限元分析软件，建立桩基在侧向荷载作用下的有限元计算模型。
By using ANSYS as the software of finite element analysis, a model is set up for calculating finite element of pile foundation with lateral load.
运用ANSYS有限元分析软件，建立桩基在侧向荷载作用下的有限元计算模型。
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