中西传统绘画的线之比较

线是绘画重要的造型因素之一。中西化精神和艺术观念的差异，使得中西传统绘画对于线的认识与运用呈现出迥异的风格特点。中国传统绘画的线在写形状物的同时，更有抒情达意的追求，它是主体与客体有机交融的产物，是“天人合一”思想的反映。西方传统绘画的线是建立在对形体空间的科学分析与认识基础上的，是对客体的理性再现。它自始至终贯穿着理性的精神，表现出主体受物理时空的制约，同客体始终处于相对对立的状态。     

蝴蝶石斛兰工厂化育苗技术的研究

研究蝴蝶石斛兰工厂化育苗技术,实验结果表明:茎尖诱导的最适宜培养基为VW+BA1mg/L+NAA1mg/L;原球茎增殖培养基以VW+BA2.5mg/L+NAA1mg/L为佳;降低培养基BA浓度至1mg/L可以明显提高芽苗的质量;芽苗生根壮苗培养基以VW+香蕉汁10%为佳,试管苗移栽成活率达90%以上。还对蝴蝶石斛兰离体快速繁殖技术的应用价值进行讨论。     

利用函数y=kx+b解物理习题

在物理教学中,引导学生将所学的数学知识运用于解决物理问题,有助于学生的认知结构的优化,有助于学生思维能力的增强,有助于学生综合素质的提高。本文介绍了笔者在这方面作的一些探索。     

线粒体与细胞凋亡

随着近年来对线粒体研究的深入，发现线粒体与细胞凋亡有着密切的关系。它通过释放细胞色素C、凋亡诱导因子AIF，或者通过产生氧自由基等多种途径导致细胞凋亡。     

语言共性论

语言是人类认知现实 ,进行交流的工具。我们生活在一个语言文字的世界里 ,时时刻刻都有人在说话、写字或阅读。语言对人类来说实在是不可或缺的 ,我们的生活越来越有赖于正确而高效地运用语言。这就是语言的共性 (普遍性 )。但我们知道世界上有上千种语言 ,不同的民族使用的是不同的语言 ,这就是语言的个性 (特殊性 )。语言的差异并没有给人类的交流带来障碍 ,在人类的成功交流的后面是什么在起作用 ?这就是撰写本文的目的。许多学者对于语言的个性感兴趣 ,试图挖掘语言的差异性 ,并撰写了许多这方面的文章。正好相反 ,本篇通过分析普遍语法的发展过程 ,着眼于语言共性的研究并试图探索语言共性的本质     

Optimization of biotransformation from phytosterol to androstenedione by a mutant Mycobacterium neoaurum ZJUVN-08

Biotransformation of phytosterol(PS) by a newly isolated mutant Mycobacterium neoaurum ZJUVN-08 to produce androstenedione has been investigated in this paper.The parameters of the biotransformation process were optimized using fractional factorial design and response surface methodology.Androstenedione was the sole product in the fermentation broth catalyzed by the mutant M.neoaurum ZJUVN-08 strain.Results showed that molar ratio of hydroxypropyl-β-cyclodextrin(HP-β-CD) to PS and substrate concentrations were the two most significant factors affecting androstenedione production.By analyzing the statistical model of three-dimensional surface plot,the optimal process conditions were observed at 0.1 g/L inducer,pH 7.0,molar ratio of HP-β-CD to PS 1.92:1,8.98 g/L PS,and at 120 h of incubation time.Under these conditions,the maximum androstenedione yield was 5.96 g/L and nearly the same with the non-optimized(5.99 g/L),while the maximum PS conversion rate was 94.69% which increased by 10.66% compared with the non-optimized(84.03%).The predicted optimum conditions from the mathematical model were in agreement with the verification experimental results.It is considered that response surface methodology was a powerful and efficient method to optimize the parameters of PS biotransformation process.     

2-取代-5-（2-苯并呋喃基）-2-芳胺基亚甲基-1，3，4-噁二唑类化合物的合成

回流条件下,以2-氯亚甲基-5-苯并呋喃-1,3,4-噁二唑为中间体,合成了一系列新的1,3,4-噁二唑类化合物。用元素分析、IR及^1HNMR确证了其结构。     

Theoretical and experimental study of through-wall microwave tomography inverse problems

We consider the problem of building structure estimation using microwave ray tomography. A Bayesian formulation is developed, and a Markov chain Monte Carlo (MCMC) procedure is used to sample the posterior distribution, which is based on a data likelihood defined in terms of a residual misfit between observed and predicted waveforms. To accelerate model optimization, a simulated annealing approach is combined with the MCMC, using specific model moves to explore each component of the model space. Our approach is applicable to data acquired in the frequency or time domain and for monostatic or bistatic acquisition modes. Experimental data for a multi-wall laboratory test structure were acquired using a horn antenna connected to a vector network analyzer and used to validate both the forward model and the inversion approach. Although, in true remote sensing problems for building structure, the model order is usually unknown, in this initial study, the actual inversion experiment is performed in a reduced-dimension model space for which a subset of the variables are taken as known or fixed. Generalization to the variable-dimension problem can be achieved by using reversible jump MCMC sampling procedures.     

Autobiographies of B’nai Mitzvah: The Meaning of B’nai Mitzvah and the Role Adolescents Believe Adults Play in the Process

ABSTRACT

B’nai mitzvah is a significant motivation for engagement in Jewish education. Professionals and families devote resources in aiding young people in becoming b’nai mitzvah. This article examines the adolescent narratives of b’nai mitzvah and the ways in which adults feature in their stories. Their accounts surface a belief that adults support them through pep talks, expressions of pride, helping them make choices, and being with them through the process. Teens see themselves responsible for their choices and achievements, but are appreciative of support. This article raises questions about what ways and by whom adolescents should be guided and supported.     

Ibn Baṭṭūṭa on Shedding of Blood in the Delhi Sultanate

Ibn Ba??ū?a's longest sojourn (734–748/1333-ca. 1347) in his famous world travels was in the domains of the Delhi sultanate ruled by Mu?ammad b. Tughluq. He presents a vivid picture of court life in Delhi and a portrait of the sultan, whom Ibn Ba??ū?a describes in contrasting terms of generosity and violence. This essay examines the latter phenomenon, first by briefly noting the contribution of two contrasting studies on the complex nature of violence itself (Part One), followed by Ibn Ba??ū?a's depiction of Ibn Tughluq's accession to power (Part Two), and then his perception of the sultan's use of capital punishment during his reign (Part Three). The last section (Part Four) adds further detail on the sultan's policy and then briefly compares Ibn Ba??ū?a's perception of the sultan's violence with that of another contemporary witness, the historian ?iyā? al-Dīn Baranī. The result suggests that Ibn Ba??ū?a's representation of violence is as nuanced as the phenomenon of violence itself.