mathematica造句
例句与造句
- Feng shiyong and zou guohua . a new method for increasing precision in survey sampling acta mathematica scientia , 2001 , 18 ( 1 ) 282 - 288
冯士雍,关于样本对总体代表性问题的认识与讨论兼论抽样调查中辅助变量的,作用，统计研究， 2001年第9期30 - 34 - In their three - year study , researchers at mathematica policy research inc . , in princeton , n . j . , followed nearly 2 , 800 children born in 18 large u . s . cities
新泽西州普林斯顿市mathematica政策研究公司的研究人员对这些孩子进行了为期3年的跟踪研究。 - The paper will combine fortran with mathematica to realize symbolic manipulation in the latter and numerical computation in the former
本文将使mathematica与fortran语言相结合，在前者推导公式，到后者进行数值求解，集成双方优势，克服单一语言的不足。 - Wolfram research is the creator of the excellent software - mathematica , which is the world ' s only fully integrated environment for technical computing
Mathematica是美国wolframresearch公司开发的优秀数学软件，它是当今世界用于科技计算的难得的一个完全集成环境下的符号运算系统。 - In addition , experiences in mathematica used in both aided design and programming are introduced , in order to offer a reference mode for theoretical deduction and its programming in related fields
此外，还介绍了mathematica在辅助设计和编制程序两方面的经验，为相关领域的理论推导及其程序化，提供了一种可借鉴的模式。 - It's difficult to find mathematica in a sentence. 用mathematica造句挺难的
- Three examples of different layer numbers and different putting methods of electro - elastic layers are given . the calculation of the frequencies of the electro - elastic and normal material plates is of some practical value
用mathematica编制相应的计算程序，给出算例，计算不同压电复合材料的振动频率，在实际应用中具有一定的价值。 - We exhibit calculating formula about direction of hopf bifurcation and the bifurcation periodic solutions in the first bifurcated to and so on with norm form theory and center mainfold theorem , furthermore , we carry out numerical simulated compution with mathematica . finally , the charting are performed with mat - lab
我们还用中心流形和规范形理论，给出了在第一个分支点_ 0处的hopf分支方向，分支周期解的稳定性的计算公式。 - In the second section , we study the multiplicity of weak focus in system ( 1 ) when b = 0 , then system ( 1 ) becomes : in [ 7 ] , the authors show that system ( 2 ) has rich global dynamics depending on all parameters , including a weak focus with multiplicity at least 2 , but the authors did n ' t calculate the multiplicity . in the second section of this article , we calculate the order of the weak focus with formative series method and mathematica 4 . 0 , and show that the order of the weak focus is two for some parameters . we also get the stability , then by hopf bifurcation theorem , we show that system ( 2 ) has at least two limit cycles for some parameters
而且我们选择了系统的原参数中的二个作为分支参数，可以使系统( 1 )进行bogdanov - takens余维2普适开折，从而证明系统( 1 )同宿轨的存在性。第二部分我们讨论系统( 1 )当b = 0时细焦点的阶数。当b = 0时，系统( 1 )为一文7对系统p ）进行了全参数分析得到系统）丰富的全局动力学性质，但当参数取某些值时系统间出现了阶数大于或等于2的细焦点，文没有计算该细焦点的阶数。 - A reasonable criterion to control error of element was studied . base upon this criterion , an indicator to drive the mobile node of bce was presented . in order to improve the efficiency , an implementing scheme ( according to the distribution of strain energy density ) was suggested when to consider the fact that the high gradient usually appears only in a very local region , especially in the case of huge amount of computation
3 .在误差控制方面，提出了bezier移动节点单元法中节点移动的收敛判据，研究了节点移动的导向原理；在mathematica和fortran环境下实现了完整的计算编程；在处理高梯度问题的实际应用中，提出了高应变能密度区的局部化处理的求解方案。 - In this paper , i consider the traveling wave solutions and peakons of the generalized camassa - holm ( gch ) equation and give the express of the solitons of this equation . the peakons and their figures of the gch equation are given with the mathematic software for m - 1 , m = 2 and m = 3 in particular ; for m = 3 , i get the generalized dissipative camassa - holm equations by adding a dissipative term and find two types exact traveling wave solutions of this equations . i also apply the homogeneous balance method into the gch equation so that i get a group of smooth solutions for m = 2 and m = 3 and the backlund transformation for m - 3 of the gch equation
本文研究广义camassa - holm ( gch )方程的行波孤立子解及尖峰孤立子解，给出gch方程的行波孤立子解的表达式，特别的，对m = 1 、 m = 2 、 m = 3时利用mathematica数学软件进行计算，解出了gch方程的尖峰孤立子解，并给出了此时gch方程的尖峰孤立子解的图形，使数值分析和理论相结合；对m = 3时的gch方程增加一耗散项u _ ( xx )后得到广义耗散camassa - holm方程，并解出此方程的两类精确行波解；本文将齐次平衡法应用到gch方程中，解出m = 2 、 m = 3时的gch方程的一组光滑解，同时应用此方法得到了m = 3时的gch方程的backlund变换。 - The research is presented based on the classical laminate theories for special boundary conditions and few papers have been formulated based on higher - order laminate theories with various cases of boundary conditions . the paper will create the structural - engineering program with mathematica to solve the problem of composite laminated plates based on higher - order laminate theories with various cases of boundary conditions
目前仅局限于有特殊边界条件的古典板理论，很少有文章涉到各种边界条件的高阶板理论。本文将利用mathematica的计算环境，编制结构分析程序，在各种边界条件下，应用多种板理论求解各向异性矩形层合板的振动控制问题。 - The main work of the paper is summarized as followings : the algorithm is improved somewhat , the algorithm is implemented in pc by mathematica software and the effectivity is proved to by testing all the examples that have been proved by d . zeilberg and h . wilf using wz - pair method and testing many identities of the book named " combinatorial identities " , which was written by h . w . gould in 1972
本文的主要结果为：对算法作了一定的改进；在微机上，用数学软件mathematica实现了这种算法；试算了d . zeilberg和h . wilf用wz对方法算过的所有例题，对h . w . gould的一本名为“ combinatorialidentities ”的书中大量恒等式也作了验证。 - In this paper , we present a system method aims at the key technique that needs solved in dimensional chain calculation , and made a in - depth research in auto search of dimensional chain graph , auto create of functional equations , calculation of functional equations etc . by the utilization of activex technique provided by cad and dll provided by mathematica we exploited tech - word computer aided dimensional chain calculation software
本文针对尺寸链计算中需要解决的几个关键技术，提出了复杂尺寸链计算的系统方法，就尺寸链图自动搜索、尺寸链方程自动生成、功能方程的计算机求解等问题进行了深入的研究。并利用cad软件的activex技术和专业计算软件mathematica提供的动态连接库技术完成了计算机辅助尺寸链计算软件的构造，开发的软件已成功应用于设计过程中。 - A variable is sampled in a certain increment , and introduced into the equations . there are two sets of any two equations to be solved . the real solutions of the two sets are protracted in spatial coordinate system to obtain two curves , so that the intersection points of the two curves can be found as the solution of the original equations
针对所得三元高次多项式方程组，采用数学分析软件mathematica编制程序，以一定的步长增量，在一定范围内取一个变量的值，并将其代入方程组中，求解其中一个方程分别与另外两个方程联立的方程组的解，将得到的实数解绘制成两条空间曲线，其交点即为原三元方程组的解。 - ( 2 ) by the jacobi elliptic function expansion method and computer symbolic systems ( maple , matlab or mathematica ) , many exact periodic solutions of nonlinear wave equations can be obtained and under some conditions , these solutions degenerate solitary wave solutions , shock wave solutions , trigonometric function solutions respectively
( 2 )利用jacobi椭圆函数展开法和数学计算软件( maple ， matlab ， mathematica等) ，可以求得一类常系数非线性发展方程的双周期解，这些解能退化成孤立子解、冲击波解、三角函数解。
