1)  pseudo differential equation
拟微分方程
1.
In this paper,through construction of an asymptotic solution,We give a necessary condition of the micro local form to local solvability of boundary value problem of pseudo differential equation with two variables.
利用微局部分析的工具,讨论了含两个变量的拟微分方程边值问题的局部可解性;通过构造渐近解的方法,给出了上述问题局部可解的微局部形式的必要条
2)  quasidifferential kernels
拟微分核
3)  quasidifferential
拟微分
1.
Difference for Two Convex Compact Sets and the Relation Between Clarke Generalized Jacobi and Quasidifferential;
两个凸紧集的差及Clarke广义Jacobi与拟微分的关系
2.
Demyanov proposed the relations between Clarke generalized gradient and quasidifferential for a d regular function and a cd regular function respectively.
Demyanov分别对两类称为d-正则和cd-正则的非光滑函数建立了Clarke广义梯度和拟微分之间的关系。
3.
Based on structuring a quotient space,consisting of pairs of convex compact sets,this paper discusses the uniqueness of quasidifferential of quasidifferentiable function.
本文在构造凸紧集对商空间的基础上,讨论了拟可微函数拟微分的唯一性,指出拟微分的表示可以不唯一。
4)  analog microwave
模拟微波
1.
The realization of mixed transmission of analog and digital microwave by existing analog microwave transmission path can help to save capital and achieve the aim of digital transmission of signals.
如果利用已有模拟微波传输通道,实现模拟和数字微波信号的混合传输,不仅可以节约资金,又能达到信号数字化传输的目的。
5)  pseudo-differential operator
拟微分算子
1.
And the continuity of some relevent operators is proved also by using a theory of pseudo-differential operator.
利用广义函数理论证明了一类广义Radon变换及其对偶变换在分布空间上的连续性;并且利用拟微分算子理论证明了一些有关算子的连续性。
2.
On the basis of the study of pre-wavelet and pseudo-differential operator,the wavelet transform by η~j_e,k operator was studied,and some new useful results have been obtained.
在研究拟微分算子及预小波基础上,探讨了jeη,k算子作用下的小波变换,得到了一些新的有用的结果。
3.
First, according to the theory of pseudo-differential operator,we study the properties of integral operator and the existence of weak solution, secondly, by use of BEM, we discret the integral equation and obtain the numerical solution.
首先,据拟微分算子的理论,讨论了积分算子的性质及问题弱解的存在唯一性;接着采用边界元方法,离散积分方程得到数值解;最后,给出了解的全局误差估计及内部超收敛估计。
6)  simulated microgravity
模拟微重力
1.
Three-dimensional cultivation of rabbit corneal keratocytes in composite materials under simulated microgravity;
模拟微重力条件下兔角膜基质细胞在复合材料上的三维培养
2.
Objective The purpose of the study was to explore the effects of simulated microgravity on the culture of stabilized fibrin-chondrocyte constructs.
目的:研究模拟微重力条件对体外构建工程化软骨的影响。
3.
Objective To detect gene expression of G6PD in Kunming mouse preimplantation embryos which were cultured in vitro under 1 g gravity and simulated microgravity.
目的研究模拟微重力条件下培养的小鼠早期胚胎体外发育与1g重力条件下体外发育的差异。
参考词条
补充资料:微分方程的差分方程逼近


微分方程的差分方程逼近
approximation of a differential equation by difference equations

  微分方程的差分方程通近【app拟。mati.ofa山价犯n-ti习闪姗柱.by山血魂.理equa西姗;即即肠。砚田朋.朋巾卜碑四.别吸.。印冲.旧e朋,pa3I.ecTll目M] 微分方程用关于未知函数在某种网格上的值的代数方程组的逼近,当网格的参数(网络、步长)趋于零时可使得逼近更加精确. 设L(Lu可)是某个微分算子,几(L声。=几,。。任叭,人“凡)是某个有限差分算子(见徽分算子的差分算子通近(aPProximation of a dilferential operator by dif-feren沈。perators”.如果算子L、关于解u逼近算子L,其阶为p,即如果 }}Lh[u]*I}汽=o(hp),那么有限差分式L声、二0(o任凡)称为关于解“对微分方程Lu=O的P阶逼近. 构造有限差分方程L声*=0关于解u逼近微分方程Lu=0的最简单例子是将Lu的表达式中每个导数用相应的有限差分来代替. 例如,方程 _子“.,、血._,_八_一n Lu三书舟+P(x)于+q(x)u=U ~“一dxZr‘~产dxl‘’可用有限差分方程 L‘“‘三生理二丛吐丛二+ h‘ U~丰I一U,_I_ +尸(x们厂竺二兹巴几十,(x功)u朋一o作二阶精度逼近,其中网格几。和几;由点x.“。h组成(m是一整数),“.是函数u*在点x.的值.又,方程 au aZu L“三共牛一斗冬二0, --一ar ax,可用关于光滑解的两种不同的差分近似来逼近: _.月+1_”月气.月上.” 一门、“nt4用“用十l‘“阴l“用一I八 于九‘(撇式格式(exPlie,}seheme))和! “几’l一嗽试,‘l}一翔二,曰衅,‘从 拭’价二一一-一—一了一--一一几,(隐式格式(一mf)liczt scheme)),其中网格D*。和D*:由点(x。,甲=(川入,似)组成,:二rhZ,r二常数,巾和n是整数,。二是函数翻、在网格点(x,,t。)的值.存在这样的有限差分算子L,它对微分算子L的逼近,仅关于方程L。一0的解。特别好,而关于其他函数则差一些.例如,算一子L*L*U。三兴,·卜·夸卫一尹{刁内队引〔其中汀二·。州一随甲‘气))关f任意的光滑函数。(*)是算 广L- d仪 L“一…一甲〔戈,“)Z(工) 办的一阶逼近(_关于八)、而关于方程大u=O的解却是二阶逼近(假定函数:,充分光滑)在利用有限差分方程与。。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。