房屋增层事故原因分析及防止方法

对国内出现的各类房屋增层设计施工事故进行了分析，找出了造成事故的主要原因，并提出了防治措施。     

对山西省经济信息系统发展的几点建议

目前山西省经济信息系统在发展中显得比较被动，其根源在于市场观念与意识不到位，缺少统一的规划与指导思想，没有绝对优势的信息产业，管理型和技术型人才相对欠缺等，鉴于此，建立了促进山西省经济信息系统发展的一些对策和建议。     

Programmed cell death during terminal bud senescence in a sympodial branching tree, Eucommia ulmoides

Eucommia ulmoides Oliv. is a typical sympodial branching tree. The apical bud of the branch ages and dies every year, replaced by the nearby axillary bud in the second year. Structural assays and a series of biochemical analyses were performed to analyze the senescence mechanism in the apical bud. It was revealed that most cells of the apical bud underwent the programmed cell death (PCD) during the senescence: the chromosomes were congregated and the nuclear contents were condensed, as shown by 4′,6-diamidino-2-phenylindole (DAPI) fluorescence. DNA fragmentation was detected during senescence using the terminal deoxynucleotidyl transferase (TdT)-mediated dUTP nick end in situ labeling (TUNEL) method, coincident with the appearance of a DNA ladder. Moreover, a 20 kD DNase related to fragmentation was found. PCD was initiated first in the young leaves, leaf primordia and peripheral zone cells, then in the central mother cells and initial layer cells in the apical meristem. The terminal buds remain in vegetative growth during senescence, in contrast to buds of many annual plants.     

在Dos下恢复Windows回收站中的文件

介绍了Windows中回收站的工作原理,阐述了保存被删除文件的算法和其特殊控制文件Info2,给出了在Dos下恢复回收站中文件的方法与步骤。     

甘肃玉门发现白钠镁矾

甘肃玉门发现的白钠镁矾矿产于玉门市花海芒硝矿床的下部。矿物呈白色、透明的短柱状，粒径０．２～０．８ｍｍ。实测维氏硬度为１３９ｋｇ／ｍｍ２，相当摩氏硬度２．８。Ｘ射线粉晶衍射主要数据（）为５．４８７（１０）、３．９９３（１０）、２．５８８（１２）、１．３６８（４）。晶胞参数α＝１１．１２６。化学成分为Ｎａ２Ｏ＝１７．３２，ＭｇＯ＝１１．９４，ＳＯ３＝４７．６２，Ｈ２Ｏ＝１９．３２。根据分析结果计算矿物化学式：Ｎａ２ＳＯ４·ＭｇＳＯ４·４Ｈ２Ｏ。     

搅拌磨超细粉磨金精矿工艺的优化

研究了搅拌磨超细粉磨金精矿的工艺,考察了主要参数对粉磨效果的影响.结果表明,通过优化磨矿过程中各种影响因素,可以获得细度-20μm＞99%的金精矿产品.     

Aberrant DNA methylation patterns in cultured mouse embryos

Mouse early embryos undergo genome-wide demethylation and remethylation events during pre-implantation development. Abnormal methylation reprogramming is thought to be associated with development arrest. Using immunofluorescence staining with an antibody against 5-methylcytosine (MeC), we examined the genome methylation patterns of mouse embryos cultured in vitro. The results did not show the difference in staining patterns between development-blocked two-cell embryos that cultured in vitro and the two-cell embryos that were freshly collected from the donor mice. But in vitro-arrested morulae displayed a strong positive staining when compared to the morulae freshly collected from the donor mice. At the blastocyst stage, although most embryos showed the expected methylation patterns, with highly stained inner cell mass (ICM) and weekly stained trophectoderm (TE), a proportion of embryos were dimly stained in both ICM and TE. These results indicated that the methylation profile of the embryos could be changed by culturing in vitro when the embryos were in the transition from morulae to blastocyst.     

ASYMPTOTIC NORMALITY OF M-ESTIMATES IN THE EV MODEL

1.Introductionaamconsidert.heerrors--ill--vanal)les(EV)modelasfollowsfwhereXandxareobservableandUnobservableran(lolllvectorsoilCPrespectively,doisitp--dimensionalunknowllparametervector,(e,II")"isap Iudilnensiollalsphericalerrorvector,whichmeansthat(E,U")…     

论《野草·风筝》的两极教育功能

鲁迅的散文诗集<野草>创造了与现实世界对立的另外一个世界,其中的诗篇<风筝>就体现了这种对立的情况.<风筝>的两极教育功能包括:启发的两极教育功能,引导的两极教育功能和教训的两极教育功能.     

企业并购中的文化整合风险及防范措施

企业文化是企业在长期经营活动中逐渐形成的一套价值观和行为规范。在并购失败的决定因素中,文化的差异性居首位。因此必须识别并购中的文化风险,采取有效的防范与控制措施,以保证并购成功。文化风险因素中的文化整合风险因素可分为两个维度下的四种类型,分别是相容型、模糊性、磨擦型、冲突型。依据对文化风险类型的分析,开展并购开始前的文化评估工作,选择适当的文化整合方式,协调与其它整合工作的关系等防范措施是必要的。