Analysis on the shrinking process of wetland in Naoli River Basin of Sanjiang Plain since the 1950s and its driving forces;
三江平原挠力河流域50年代以来湿地退缩过程及驱动力分析
Peer nomination was used to select social withdrawal children,94 children were named withdrawal;children in which 77 cases were valid.
以288名9岁儿童和他们的班主任老师、母亲为被试,使用同伴提名的方法鉴别出94名行为退缩儿童。
68 of them were classified as social withdrawal children after an observation of 30 minutes free play.
本研究以4岁儿童为被试,通过对30分钟自由游戏的观察,其中的68名被鉴别为行为退缩儿童。
This paper studies further the existence and piqueness of the global generalized solution ofthe initial - boundary value problem for a class of degenerate pseudohyperbolic equation, and obtains new result.
进一步研究一类退缩拟双曲方程的初边值问题整体广义解的存在唯一性，得到新的结果。
n this paper we study the initial-boundary value problem for a class of degenerate pseudu-hyperbolic equationby means of compactness method and monotomicity method, and have improved and generalized the results of [1].
用紧致性方法与单调性方法研究一类退缩拟双曲方程的初边值问题。
In this paper, the nonlinear degenerate parabolic equation u t= ln (1+｜u｜)(△u+u) subject to dirichlet boundary conditions is studied.
考虑退缩抛物型方程ut =ln(1 +｜u｜) (△u +u)的初边值问题 ,得出了解的存在性和非负