基于有限元数值模拟的直流电阻率激电找矿探测技术

为提高直流电阻率激电探测成果地质解释准确性,促进直流电阻率激电在找矿勘查中的应用,采用有限元数值模拟对直流电阻率激电探测中低阻高极化体、直立板状体、低阻盖层、高阻盖层、地表不均匀体、地形起伏及实测数据反演解释几个主要方面进行了对比分析。研究结果表明,对于实际勘查中的反演解释结果,根据异常特征构建地质体模型并进行有限元数值模拟,能快速判别探测目标体异常属性、区分虚假异常,提高定量解释水平及找矿勘查效率。研究结果为直流电阻率激电找矿探测定量解释提供了参考。     

含单层吸收媒质的滤光片的全匹配诱导设计分析

本文从导纳匹配的观点出发,分析并介绍了一种确定全匹配状态下诱导滤光片的结构参数的方法,并提出了匹配波长处的透射率的解析表达式。     

诱导不结瘤豆科树种结瘤固氮的研究

根据国内外有关诱导非豆科作物结瘤固氮的现状,结合作者几年来的工作,对诱导不结瘤豆科树种结瘤固氮的可行性进行了探讨,并报道了作者近年来人工诱导不结瘤的豆科树种—山皂荚(Gledtsia melanacantha)的试验结果。     

电磁感应与相对论

从相对论出发,讨论感生电动势、动生电动势以及动生电场的电动势的联系     

Chiral ligand-protected gold nanoclusters: Considering the optical activity from a viewpoint of ligand dissymmetric field

Chirality is a geometric property of a physical, chemical, or biological object, which is not superimposable on its mirror image. Its significant presence has led to a strong demand in the development of chiral drugs, sensors, catalysts, and photofunctional materials. In recent years, chirality of nanoscale organic/inorganic hybrids has received tremendous attention owing to potential applications in chiral nanotechnology. In particular, with the recent progress in the syntheses and characterizations of atomically precise gold nanoclusters protected by achiral thiolates, atomic level origins of their chirality have been unveiled. On the other hand, chirality or optical activity in metal nanoclusters can also be introduced via the surface chiral ligands, which should be universal for the nanosystems. This tutorial review presents some optically-active metal (gold) nanoclusters protected by chiral thiolates or phosphines, and their chiroptical (or circular dichroism; CD) properties are discussed mostly from a viewpoint of the ligand dissymmetric field scheme. The examples are the gold nanoclusters protected by (R)-/(S)-2-phenylpropane-1-thiol, (R)-/(S)-mercaptosuccinic acid, phenylboronate-D/L-fructose complexes, phosphine sulfonate-ephedrinium ion pairs, or glutathione. Some methodologies for versatile asymmetric transformation and chiroptical controls of the nanocluster compounds are also described. In the dissymmetric field model as the origin of optical activity, the chiroptical responses of the gold nanoclusters are strongly associated with coupled oscillator and/or CD stealing mechanisms based on the concept of induced CD (ICD) derived from a perturbation theory, so on this basis, some characteristic features of the observed CD responses of chiral ligand-protected gold nanoclusters are presented in detail. We believe that various kinds of origins of chirality found in ligand-protected gold nanoclusters may provide models for understanding those of many related nanomaterials.     

关于映射的两个导出映射

设f：A→B是映射,任意C∈2^A,令f1（C）=f（C）,任意D∈2^B,令f2（D）=f^-1（D）,则称f1,f2是f的导出映射．研究了单射、满射、双射（及其逆）、映射的积的导出映射,并得到了相应的结果．     

格林函数倒易性在电磁场理论中的应用

格林函数在电磁场理论中有着非常广泛的应用。如在求解静电场问题时，往往会涉及到求解感应电荷的问题，而一般来说感应电荷的量值是不易求得的，特别是对不规则形状的导体。通过应用格林函数的倒易性来求解某些接地导体上感应电荷，能比较简便地解决这个问题。     

对长直导线周围涡旋电场的几点讨论

通过对长直导线通以变化电流时所产生的涡旋电场的分析、讨论,给出了涡旋电场分布公式,并着重对其分布特点,进行了讨论和说明。     

技术创新的市场需求诱导效应研究

在市场需求影响技术创新机理分析的基础上,运用统计方法对我国31个省市的数据进行实证分析.结果表明:市场需求与技术创新能力呈显著的正相关,市场需求在宏观层次上已经成为我国主要的技术创新动力来源.研究表明,由于我国区域的差异,市场需求对创新能力的影响可以分为东部、中部和西部3类不同的地区进行分析,各个地区应分别采取相应政策措施完善市场机制,促进技术创新.     

海棠果插穗扦插生根过程解剖学观察

从解剖学角度观察了海棠果插穗不定根的发育过程，结果表明：（1）海棠果2年生插穗茎内无潜伏根原基，不定根由诱生根原基发育形成，诱生根源于初生射线与维管形成层交汇处细胞的分裂分化。大约经15d，不定根原基发育为幼小不定根并伸出周皮之外。（2）愈伤组织内有些细胞分化为具螺纹加厚的厚壁细胞，在愈伤组织内未发现根原基。