浅谈我国未来循环经济的发展与战略选择

循环经济是一种新兴的物尽其用的经济发展模式,它强调资源的再使用和再循环。实行循环经济是保障工业企业可持续发展的客观需要,也是实施可持续发展战略的重要途径和实现方式。 更多还原     

取代苯甲酸酸性比较

本文根据实验数据和电子效应理论，解释了取代苯甲酸三个同分异构体之间酸性强弱的原因。     

赢在管理的三部曲——以通用电气公司管理为例

纵观人类社会的发展,我们发现有人群的活动就有管理,有了管理,组织才能进行正常有效的活动.然而一个企业、组织想要在当代激烈的竞争中取得成功,就更需要重视组织的管理工作.笔者认为在众多的管理理念中,使命感和价值观、力争公平和有效的考评以及变革是管理过程中极其重要的三个部分.三者既各自独立又相互联系,共同构成了企业赢在管理的三部曲.文章着重从这三个方面进行分析,在指出三者重要性的前提下,提出合理化建议,旨在帮助企业和组织赢在管理上.     

π干涉学中拟合参数可靠度的分析

分析高能核核碰撞中的π干涉学的拟合参数—源的半径、寿命和相干参数之间的关系,以及q0截断对半径的影响和4π数据对寿命不敏感的原因.     

Label-free and real-time detection of specific binding of IgG proteins by oblique-incidence reflectivity difference method

The entire interaction process between anti-mouse immunoglobulin-G (IgG) and mouse IgG with a concentration range from 1 to 0.25 mg/mL has been label-free detected by the oblique incidence reflectivity difference (OIRD) method.We achieved the two-dimensional scanning images of OIRD Re{△ p △s } intensities before and after interactions as well as the curves of reaction dynamic processes.The experimental results suggest that OIRD method not only can label-free distinguish the different concentrations of proteins and detect biological microarrays,but also can real-time monitor the kinetic processes of biomolecular interactions.     

祖国统一大业与中华民族凝聚力

：中国传统文化历来注重国家统一，统一是中国历史发展的主流。实现祖国统一必须增强中华民族的凝聚力。中华民族具有极强的凝聚力，两岸统一是民心所向、大势所趋。台湾回归祖国，不仅对两岸经济社会发展有诸多好处，而且反过来会在很大程度上增强中华民族凝聚力。为了实现祖国统一，应特别注意做好四方面的工作：一、推进中国特色社会主义建设，提升综合国力；二、深化政治体制改革，加强民主化、法制化建设；三、坚持和完善“一国两制”方针，确保香港、澳门的稳定与繁荣；四、加强两岸经济文化交流，与“台独”势力进行坚决斗争。     

Genomic and genic sequence variation in synthetic hexaploid wheat （AABBDD） as compared to their parental species

In order to understand the genomic changes during the evolution of hexaploid wheat, two sets of synthetic hexaploid wheat from hybridization between maternal tetraploid wheat （AABB） and paternal diploid goat grass （DD） were used for DNA-AFLP and single strand conformation polymorphism （SSCP） analysis to determine the genomic and genic variation in the synthetic hexaploid wheat. Results indicated that more DNA sequences from paternal diploid species were eliminated in the synthetic hexaploid wheat than from maternal tetraploid wheat, suggesting that genome from parental species of lower ploidity tends to be eliminated preferentially. However, sequence variation detected by SSCP procedure was much lower than those detected by DNA-AFLP, which indicated that much less variation in the genic regions occurred in the synthetic hexaploid wheat, and sequence variations detected by DNA-AFLP could be derived mostly from non-coding regions and repetitive sequences. Our results also indicated that sequence variation in 4 genes can be detected in hybrid F1, which suggested that this type of sequence variation could be resulted from distant hybridization. It was interesting to note that 3 out of the 4 genes were mapped and clustered on the long arm of chromosome 2D, which indicated that variation in genic sequences in synthetic hexaploid wheat might not be a randomized process.     

一类环形区域上的椭圆问题

文章讨论一类环形区域上的Laplace边值问题-△u=f（u），x∈B1＼Bt；u=0，x∈B1；u/n=0,x∈Bt利用Leggett—Williams三解定理获得至少三个非负径向解的存在性．     

NECESSARY AND SUFFICIENT CONDITION FOR GLOBAL CONTROLLABILITY OF A CLASS OF AFFINE NONLINEAR SYSTEMS

In this paper, we investigate the global controllability of a class of n-dimensional affine nonlinear systems with n- 1 controls and constant control matrix. A necessary and sufficient condition for its global controllability has been obtained by using the methods recently developed. Furthermore, we generalize the above result to a class of affine nonlinear systems with a block-triangular-like structure. Finally, we will give three examples to show the applications of our results.     

用水萃取法提取仙人果中的玫瑰红色素

以水为萃取剂,加入L-抗坏血酸作抗氧化剂、果胶酶降解果胶、改性甲壳胺吸附蛋白质.提取仙人果中的玫瑰红色素,此法萃取率高、工艺简单、无污染.