边界积分方程的离散基于常数元模式。
相当于在一元微积分中，取一个函数的不定积分，仅仅需要在结果后加一个常数。
It is the same thing as, in one variable calculus, when you take the anti-derivative of a function it is only defined up to adding the constant.
大脑解剖实验表明用药的老鼠在称为齿状回的脑部区域生长出三倍于正常数目的神经元。
When dissected, the treated rats turned out to have three times the usual number of newborn neurons in a brain region called the dentate gyrus.
获得了一类带有连续和分段常数变元的中立型微分方程所有解振动的新的充分条件。
The new sufficient conditions for the oscillation of all solutions of the neutral differential equation with continuous and piecewise constant arguments are obtained.
通过构造差分方程的周期数列解，研究了一类具有分段常数变元的脉冲微分方程周期解的存在性。
The existence of periodic solutions for a class of impulsive differential equations with piecewise constant argument is studied by constructing periodic sequence solutions of difference equation.
不管是宇宙常数还是第五元素，都属于暗能量的？畴。
Both the cosmological constant and quintessence fall into the general category of dark energy.
此外，推导出波导tm、TE模的传输功率、损耗功率、衰减常数、等效阻抗等特征参数的边界元公式。
Furthermore, the formulae of transmitted power, loss power, attenuation constant and equivalent impedance for TM and te modes are deduced.
用光度法测算了醇与有机磷一元酸四面体钴配合物加合反应的平衡常数。
The equilibrium constants of addition reaction of alcohol to tetrahedral complex of cobalt with organophosphorus monobasic acids in octane are established by spectrophotometry.
文章将建立了具有分段常数滞后变元微分方程组振动的一个充分条件，并讨论其非振动解的渐近性。
The present paper is devoted to the oscillations and nonoscillations of a kind of impulsive delay differential equations with piecewise constant argument.
应用全矢量电磁场有限元方法，计算了保偏光纤的两个偏振模场的分布、传输常数及模式双折射。
This fiber's polarization modes, transmitting constants and modal birefringence were computed by the full vector finite element method.
结果表明，单元边长相同时，常数边界元比三角形线性有限元的精度要商。
The results show that constant boundary elements have higher accuracy than linear triangular finite elements when they have the same length of side.
线性边界元法（LBEM）是在常数边界元法（CBEM）的基础上，从线性插值函数出发将边界单元按线性分布来进行处理的一种数值方法。
The linear boundary element method (LBEM) is based on the constant boundary element method (CBEM), it makes boundary element into linear segment from linear interpolating function.
用有限元法分析纸浆模塑包装结构，需要事先确定纸浆模塑材料的弹性常数。
It is necessary to determine the elastic constants of molded pulp material in advance for analyzing the packaging structure made of molded pulp by finite element method.
结合工程实例，计算了单向纤维增强复合材料工程常数，探讨了各向异性材料的有限元问题。
With practical examples, I have calculated the unidirectional fiber-reinforced composite material engineering constants and discussed the finite element issue of anisotropic materials.
利用组合杂交有限元法得到了一个四节点轴对称元，并采用协调等参双线性位移来逼近及分片常数应力模式。
A 4-node axisymmetric solid element is derived by combined hybrid methods. Compatible isoparametric bilinear displacement approximations and the constant stress mode are employed.
基于三维均匀化方法并结合有限元技术，计算三维蜂窝夹层板的等效弹性常数。
Using the 3-D homogenization method and the finite element technique, we evaluate the effective elastic constants of the 3-D honeycomb sandwich panel.
以五角形波导为例，比较了常数边界元法和线性边界元法两者各自的优势。
Taking the pentagon waveguide for example, LBEM has been compared with CBEM to obtain the advantage and difference.
用有限元法分析了标准电容器电场的电位势的分布，得到了孔洞材料的介电常数。
The distribution of electrical potential of standard capacitor is analyzed by finite element method;
研究了测定碳化液中石油助长剂活性组份含量的方法——酸碱滴定法的测定条件和干扰因素； 确定了石油助长剂活性组份为一元弱酸盐，测得了对应的一元弱酸的离解常数和用强碱滴定时的等当点。
The conditions and interfering factors of the acid base titration method which has been used to determine the active components of the petrol growth substance in the carbonating solution were studied.
研究了测定碳化液中石油助长剂活性组份含量的方法——酸碱滴定法的测定条件和干扰因素； 确定了石油助长剂活性组份为一元弱酸盐，测得了对应的一元弱酸的离解常数和用强碱滴定时的等当点。
The conditions and interfering factors of the acid base titration method which has been used to determine the active components of the petrol growth substance in the carbonating solution were studied.
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