高层建筑底板混凝土温度场分析

基于ANSYS软件开发了适合大体积混凝土温度场分析的相应模块,并运用到实际工程中,取得较好的预期效果。     

人性化管理在医学图书馆中的应用

当前,随着我国信息技术发展速度的不断加快,我国医学图书馆的服务观念已从单纯的读者服务转向协调、合作、共享的服务模式。我国医学图书馆正在向信息增值型、产业型以及服务型的方向发展。将人性化管理理念运用于医学图书馆管理中来,就是一种以围绕人的生活、工作习性展开研究,使现代医学图书馆在管理过程中能够更加贴近人性,满足人的多样化需求,从而更有效地提高工作效率。     

浅析阶梯电价应用中的问题及发展前景

阶梯电价作为电价改革的重要举措提出来以后,受到社会广泛的争议,究竟是让用户合理承担用电成本,还是供电企业变相涨价,一时间众说纷纭,文章将从阶梯电价应用的必要性入手,分析阶梯电价在应用过程中将遇到的问题,并对发展前景进行了论述。     

程控交换机主叫号码显示业务及故障分析

数字程控交换机的主叫号码显示是应用最广泛的交换机新业务,文章介绍了数字程控交换机主叫号码显示业务的使用及一些常见故障的分析。     

汽轮机汽封改造

文章通过对迷宫梳齿密封与王常春接触式蜂窝汽封的优缺点和工作原理进行了比较说明,介绍了王常春接触式蜂窝汽封在汽轮机组上的应用情况,以及进行汽封改造后所取得的效果.     

Genome sequence and analysis of the tuber crop potato

Potato (Solanum tuberosum L.) is the world's most important non-grain food crop and is central to global food security. It is clonally propagated, highly heterozygous, autotetraploid, and suffers acute inbreeding depression. Here we use a homozygous doubled-monoploid potato clone to sequence and assemble 86% of the 844-megabase genome. We predict 39,031 protein-coding genes and present evidence for at least two genome duplication events indicative of a palaeopolyploid origin. As the first genome sequence of an asterid, the potato genome reveals 2,642 genes specific to this large angiosperm clade. We also sequenced a heterozygous diploid clone and show that gene presence/absence variants and other potentially deleterious mutations occur frequently and are a likely cause of inbreeding depression. Gene family expansion, tissue-specific expression and recruitment of genes to new pathways contributed to the evolution of tuber development. The potato genome sequence provides a platform for genetic improvement of this vital crop.     

Temperature-scan cryocrystallography reveals reaction intermediates in bacteriophytochrome

Light is a fundamental signal that regulates important physiological processes such as development and circadian rhythm in living organisms. Phytochromes form a major family of photoreceptors responsible for red light perception in plants, fungi and bacteria. They undergo reversible photoconversion between red-absorbing (Pr) and far-red-absorbing (Pfr) states, thereby ultimately converting a light signal into a distinct biological signal that mediates subsequent cellular responses. Several structures of microbial phytochromes have been determined in their dark-adapted Pr or Pfr states. However, the structural nature of initial photochemical events has not been characterized by crystallography. Here we report the crystal structures of three intermediates in the photoreaction of Pseudomonas aeruginosa bacteriophytochrome (PaBphP). We used cryotrapping crystallography to capture intermediates, and followed structural changes by scanning the temperature at which the photoreaction proceeded. Light-induced conformational changes in PaBphP originate in ring D of the biliverdin (BV) chromophore, and E-to-Z isomerization about the C(15) = C(16) double bond between rings C and D is the initial photochemical event. As the chromophore relaxes, the twist of the C(15) methine bridge about its two dihedral angles is reversed. Structural changes extend further to rings B and A, and to the surrounding protein regions. These data indicate that absorption of a photon by the Pfr state of PaBphP converts a light signal into a structural signal via twisting and untwisting of the methine bridges in the linear tetrapyrrole within the confined protein cavity.     

多目标规划纯量化问题的Lipschitz稳定性

利用Kojima函数的正则性质研究了多目标规划问题的纯量化问题解的强Lipschitz稳定性．     

改进的Morlet小波与再生核空间

给出了改进的Morlet小波变换像空间的再生核函数的具体表达式及等距恒等式,并利用再生核函数的结构对改进的Morlet小波变换的像空间作出了具体的描述,并将对小波与再生核的关系得出一个新的发现,为一般小波变换像空间的讨论提供了基础．     

HMCM-56分子筛催化苯酚与异丙醇烷基化反应的研究

研究HMCM-56分子筛上苯酚与异丙醇烷基化反应,探讨了反应条件包括温度,原料配比,催化剂的装填量,空速对催化剂催化性能的影响．通过X射线衍射、研究催化剂的酸性及晶相．得到最佳反应条件：T=220℃,WHSV=3．0h^-1,Catalyst Loading=0．3g,n（IPA）／n（Phenol）=0．8,苯酚的转...