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人类对性本质的认识是一个不断发展的过程,由此产生了各种不同的具有时代特征的性价值观念。由性本能论——性生育论——性情爱论——性娱乐论——性自我实现论,构成了人类性价值观念发展相互连接的链条,标志着全人类对性本质认识的逐步深化和人们性生活质量的不断提高。 相似文献
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王见勇 《常熟理工学院学报》2007,21(10):38-43,60
对庞大的凸性家族给予轮廓性描述,以期引起同仁对各种非常规凸性研究的关注.本文第一节简述通常凸性概念及其在不等式理论方面的几个简单应用,第二节简介几何凸性、对数凸性、指数凸性及其与通常凸性之间的相互关系;第三节介绍集合与函数的理想凸性;第四节简介由笔者首创的积分凸性及其进展. 相似文献
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凸性与广义凸性综述(2) 总被引:1,自引:0,他引:1
王见勇 《常熟理工学院学报》2008,22(2):41-46
本文是凸性与广义凸性综述(1)(见常熟理工学院学报2007年第10期)的第二部分,介绍笔者近年关注较多的β-凸性;最后罗列了散见于文献的其它几种广义凸性. 相似文献
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"提出问题,猜想和假设,引导讨论,分析与论证,交流与合作"构成了当今中学数学课堂教学的重要环节.课堂教学过程应根据不同课的类型、不同的教学内容、不同的教学环节而灵活设置.本文通过不同课例的分析,从情境性、过程性、方法性、变式性、引申性等方面对"问题探究"教学提出了一些粗浅的认识. 相似文献
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周章海 《天津职业院校联合学报》2014,(2):42-45
文章阐明了稳性的定义及分类,论述了影响船舶适度稳性的各项因素,并且提出了船舶稳性的各项校核与检验,为克服船舶稳性不足应采取的相应调整。 相似文献
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要实现高效课堂.必须明确课堂教学中的几个重要动态因子:情趣性、三效性、问题性、生成性,即在宽松的课堂氛围中彰显情趣,在充分学生的主观能动性中映现三效,在引导学生自主探究中出现问题,在课堂生成中凸显智慧和能力,在合作学习中达成目标. 相似文献
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将线条从书法艺术完整的形态中提取出来,通过对线的象形性、意象性、时空性、运动性以及表情性几个方面的分析,由外在视觉到内在心理感受书法线条作为艺术表现语言的魅力所在。 相似文献
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考虑了一阶具有分段常数时滞与逐段常数变元的非线性中立型脉冲微分方程{[x(t)-cx(t-[t])]′-p(t)f(x([t]))=0,t0,t≠k,x(k)=bkx(k-),k=1,2,….解的振动性与渐近性.得到了上述方程所有非平凡解非振动与非振动解渐近性的充要条件,所得到的结果推广了一些已有的结果. 相似文献
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张晓声 《忻州师范学院学报》2002,18(2):48-50
对于P∈C(犤to,∞),R),Q∈C(犤t0,∞),R ),给出了中立型方程犤x(t)-P(t)x(t-τ)犦(n) Q(t)x(t-σ)=0,的充分条件,改进了已知的结果。 相似文献
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王智慧 《衡阳师范学院学报》2005,26(6):6-8
研究了一类高阶时滞泛函微分方程x^(n)(t) +p(t)x(t-τ) =0解的振动性,其中,n≥2是偶数。p∈C( [t0 +∞)),获得了一个新的振动性条件; 相似文献
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David H. Wilder Robert M. Midkiff Jr. Robert E. Dunkerly Richard C. Skelton 《Research in higher education》1996,37(3):179-198
This study explores the impact of higher education on 3,942 arts and sciences students as measured by change in their freshman and senior ratings of four Clark-Trow educational philosophies: vocational, academic, collegiate, and nonconformist (Clark and Trow, 1966). A repeated measures analysis of variance was applied to each of the four philosophies, controlling for sex, entering year, major, parents' educational background, scholastic aptitude, and academic motivation. As expected from Clark-Trow theory, students showed significant increases in academic and nonconformist philosophies, and decreases in vocational and collegiate philosophies. Relationships between independent variables and freshman-senior change suggested post hoc reinterpretation of the dimensions underlying the Clark-Trow phenotypes: i.e., from identification with the college and involvement with ideas to social interests and academic interests (the latter suggested by Terenzini and Pascarella, 1977). 相似文献
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王智慧 《湖南科技学院学报》2005,26(11):30-32
In this paper, we investigate a class of higher order delay differential equation x^(n)(t)+(p)x(t-τ)=0 where n is an even positive integer, p∈C([ t0,+∞)). We obtain a new oscillation condition for this class. 相似文献
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主要应用环绕定理及一些解的估计来讨论一类半线性椭圆方程:-△u-μ/(|x|2)u=k(x)|u|2*-2u+λu,u∈H01(Ω),当k(x)满足一定条件时,方程存在一个非平凡解。 相似文献
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饶若峰 《黄冈师范学院学报》2003,23(3)
给出了半线性椭圆方程-Δu=λ1u+|u|2*-2u+τ(x,u)的Dirichlet问题在对扰动项τ(x,u)增加适当条件后非平凡解的存在性定理,以及方程-Δu=λu-|u|2*-2u+h(x),λ∈[λ1,λk](这里λk是方程-Δu=λu的第k个互不相等的特征值)的非零解的存在性定理. 相似文献
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D. Benito Echeverria D. Pilar Figuera D. Sofia Gallego 《International journal for the advancement of counseling》1996,19(1):3-13
In the present period of change, the Spanish systems of secondary and higher education, too, are confronted with new challenges. People have realized that factors within and outside universities demand the development of effective helping services for students, particularly on the level of orientation. Two different models are described, one that relies on tutors, mainly; the other one employs orientation professionals. The article also describes the skills and the training experiences that are necessary for professionals in orientation services.Facultat de Psicologia i Pedagogia, Universitat Roman Llull 相似文献
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张克玉 《山东教育学院学报》2009,24(1):65-68
给出了二阶中立型逐段常变量微分方程d^2/dt^2(x(t)+p(t)x(t-1))=qx(2[t+1/2]+g(t,x(t),x([t]))d^2/dt^2(x(t)+p(t)x(t-1))=qx(2[t+1/2]+f(t)的伪ω周期解存在唯一性的充分条件. 相似文献
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This paper details the impact of market policies in New Zealand on one low socio-economic school, raising questions about the underlyingassumptions of the programmes designed to turn around so called failing schools. The impact of macro policies on disadvantaged schoolsin the market place is documented, as is recent evidence on the impactof schools entering a spiral of decline on their examination outcomes.It is argued that school success and failure cannot be understood inisolation but needs to be placed in the wider context of stateeducational policy. Consequently, change strategies which ignore thewider policy settings risk failure. 相似文献