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Based on the traits of the aspherical lens, the sunlight was focused on a very small spot, and then it was transferred into a plastic fiber by an aspherical lens and a selfoc lens. A formula for calculating the optimal length of selfoc lens is presented. The optimal assembly of the aspherical lens and selfoc lens was implemented by the aid of this formula. Therefore, sunlight is coupled into a plastic fiber efficiently.

根据非球面透镜垂轴球差小的特点把太阳光会聚到很小的光点,再利用长度约为1/4节距的自聚焦透镜改变光线的数值孔径使其满足光纤的数值孔径,通过一个计算公式来计算最佳的自聚焦透镜长度,实现非球面透镜和自聚焦透镜的最佳组合,把太阳光以较高的耦合效率耦合进塑料光纤。

Systemic studies environment temperature how to influence construction control, finds out linear regularity and function formula of the arch rib, selects optimal closure time, then fully meets requirements of closure precision and linear. By testing a lot of data on temperature and strain and adopting least squares collocation, this dissertation deduces the strain calculate formula that is amended by joining temperature factor, then improves accuracy of stresses testing data.

系统地研究外界温度变化对施工监控的影响,找出了拱肋变化的线性规律和函数式,选择出最佳合龙时机,保证了拱肋的合龙精度和线形要求;测试了大量温度与应力对应关系的实验数据,采用最小二乘拟合推估法,推导出温度修正后的应变计算公式,从而提高了应力测试数据的准确性。

In Chapter 4, using the formula A_k(2) given by Wei, we propose a new A_k(2)-SQP method, which develepments the using of the quasi-Newton formula BFGS, and combines with SQP method to solve constrained optimization problems, the corresponding algorithm possesses global convergence and supei linear convergence property.

第四章,利用韦提出的A_κ(2)公式,我们给出了一种A_κ(2)-SQP方法,该方法把拟牛顿修正公式BFGS进行了推广,并结合SQP方法去解约束优化问题,相应的算法具有全局收敛性和超线性收敛性。

The new form of Lorentz Force Formula,that will be suitable for the charge at any speed,has been derived,and it can be transformed into the general Lorentz Force Formula in any case at lower speed.

并在此基础上导出了适用于任意速度的新的洛伦兹力公式,它在低速情况下转化为通常的洛伦兹力公式。

Experimental Verification : Theory formula is the average value of the random variable mathematical expectation formula.

实验验证:理论平均值公式就是随机变量取值的数学期望计算公式。

However, each factor has its marked feature, it is difficult to use an accurate mathematical formula or statistical formula to ...

但各相关因素具有非显著性的特点,很难用一个准确的数学公式或统计公式来描述相互间的关系。

Lastly, the formula that can calculate the stack space which is maximal was presented based on tree structure and the stack space of a real system was calculated by the formula.

分析了任务栈空间结构,定义了能够表示栈空间最坏使用情况的树结构,提出了用树结构计算最坏情况下栈空间的计算公式,并计算了一个实际系统的栈空间。

There is no obvious differences in Design between Asus Rampage Formula and Asus Maximus Formula .

不存在明显的差异,在设计与华硕狂暴公式和华硕鲆公式。

To exam the validity of the Bloch-Grüneisen formula at megabar pressures, we use the electrical conductivity data point of ε-iron at relatively low pressure (~40GPa) reported by Keeler as a reference point, a formula for calculating the conductivity of the ε-iron under high-pressure and temperature was deduced via Bloch-Grüneisen,where v is specific volume , T is temperature and σ is electrical conductivity .

为了检验Bloch-Grüneisen公式在兆巴压力冲击压缩下的有效性,本文取Keeler在较低压力下ε相区的一个电导率数据作为参考点,得到了Bloch-Grüneisen公式关于ε-铁在高温高压下电导率的一个解析表达式:σ=〓,这里,比容v的单位是cm〓/g,温度T的单位是K,电导率σ的单位是Ω〓cm〓。

The maj or obj ect of this paper is the medium.small size concrete dams that have been used for many years.They have the characteristic that the alteration of water height of reservoirs is unobvious and the dams, displacements are affected mainly by temperature.With a case,the method of stepwise regression is used to analyze the vertical displacement prototyDe observed data.Then regression equation is established,the relation of dam,s displacement with hydraulic pressure、temperature、time effect is analyzed and the displacement change rule is obtained,the dam'S displacement onlv dependent to temperature is received.According to the theory of Finite Elements Method,the quasi-stationary temperature field formula and temperature stress formula are deduced.The QTP program and TFEM3D program are written with FORTRAN.The same case is calculated through QTP program to solve the quasi-stationary temperature and through TFEM3 D program to solve the dam'S displacement and find tlle dam,s deformation rule.This rule is accordant with the regression,S resuIt.

本文主要针对运行期间库水位变化很小、坝体的位移主要受温度变化影响的中小型混凝土坝,结合工程实例,采用逐步回归的方法对垂直位移原型观测资料进行分析,建立回归方程,分析坝体位移与水压、温度、时效之间的关系以及位移变化规律,分析结果坝体位移只与温度有关,而基本上不受库水位变化和时效的影响;根据有限元原理推求了混凝土坝准稳定温度场公式和温度应力公式,利用FORTRAN语言编制出QTP准稳定温度场程序和TFEM3D位移场程序,对大坝的温度场和位移场进行计算,求出坝体结点的变温值和坝体结点位移值以及单元应力分量,分析得到大坝的变形规律与实测资料以及回归统计变形规律一致,说明对坝体准稳定温度场的研究是正确的。

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Yet, Edith says, there was always money in the bank.

但是Edith说,她的银行户口里面总是有钱。

We have created a series of files that resolve this problem--one for each day of the 40 days of purpose.

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