Eisenstein's criterion】的更多相关文章

https://en.wikipedia.org/wiki/Eisenstein%27s_criterion In mathematics, Eisenstein's criterion gives a sufficient condition for a polynomial with integer coefficients to be irreducible over the rational numbers—that is, for it to be unfactorizable int…
C++98: 1.相同点: Allocators having the same type were assumed to be equal so that memory allocated by oneallocator could be deallocated by another allocator of the same type. It was not possible to change the memory resource at runtime.Allocators had li…
今天笔记主要是记录笔记,以及代码: criteria: 创建查询接口:createCriteria(class) 查询条件接口:add(各种条件); Restrictions 提供了设置参数的各种接口 逻辑运算 not or and 字符串模式匹配 like ilike 范围运算 in not in between between and 比较运算 eq/le/lt..... 集合运算 isNotEmpty 可以链式编程 List grades=session.createCriteria(Gr…
在查询方法设计上能够灵活的依据Criteria的特点来方便地进行查询条件的组装.Hibernate设计了CriteriaSpecification作为Criteria的父接口,以下提供了Criteria和DetachedCriteria. Criteria和DetachedCriteria的主要差别在于创建的形式不一样,Criteria是在线的,所以它是由HibernateSession进行创建的;而DetachedCriteria是离线的,创建时无需Session,DetachedCriter…
In [Zhang, Zujin; Yao, Zheng-an. 3D axisymmetric MHD system with regularity in the swirl component of the vorticity. Comput. Math. Appl. 73 (2017), no. 12, 2573--2580], we have obtained the following fine property of the convective terms of axisymmet…
在 [Lee, Jihoon. Notes on the geometric regularity criterion of 3D Navier-Stokes system. J. Math. Phys. 53 (2012), no. 7, 073103, 6 pp] 中, 作者证明了如果$$\f{u}{|u|}\times \f{\om}{|\om|}\cdot \f{\n\times \om}{|\n\times \om|}$$充分小, 则解光滑.…
A dead-simple, yet extensible, C test framework. Philosophy Most test frameworks for C require a lot of boilerplate code to set up tests and test suites -- you need to create a main, then register new test suites, then register the tests within these…
sklearn实战-乳腺癌细胞数据挖掘(博主亲自录制视频) https://study.163.com/course/introduction.htm?courseId=1005269003&utm_campaign=commission&utm_source=cp-400000000398149&utm_medium=share 赤池信息量准则[1]  是由日本统计学家赤池弘次创立的,以熵的概念基础确定. 赤池信息量准则,即Akaike information criterion…
Calinski-Harabasz准则有时称为方差比准则 (VRC),它可以用来确定聚类的最佳K值.Calinski Harabasz 指数定义为: 其中,K是聚类数,N是样本数,SSB是组与组之间的平方和误差,SSw是组内平方和误差.因此,如果SSw越小.SSB越大,那么聚类效果就会越好,即Calinsky criterion值越大,聚类效果越好. 1.下载permute.lattice.vegan包 install.packages(c("permute","lattic…
Routh-Hurwitz Criterion 为什么仅仅要有一个极点在右半平面,那么系统就不会稳定? 比如H(s) =( 1/(s+1) ) *  ( 1/(s+3) ) * ( 1/(s-2) ) 这里有个极点s = 2 在有半平面,通过laplace 反变换能够知道,当时间足够长的时候,AB都衰减的非常厉害了.而C却还在添加,这时候系统是不会稳定的 于是紧紧抓住这个特性不放,就会引出劳斯稳定判据. 右半平面的极点能够通过特征方程来判定 仅仅有当特征方程的全部系数都是同一个符号的时候.系统的…