孵化器应该由谁来孵化

忽视对孵化器本身生长规律的探究和总结,就如同仅以小孩的健康成长为中心,却无视母亲健康的做法一样。孵化器的迅猛发展,有力地推动了科技型企业的发展,为企业技术创新开辟了广阔的空间。但是,现阶段我国孵化器的发展主要是由政府自上而下推动的,它们的成立缺乏深厚的市场基础,一些初创的孵化器尤其是地处欠发达地区的初创孵化器运转状况不尽人意。此前,谈起孵化器的作用,人们总是强调其哺育初创企业的作用,往往忽视其本身也有创造价值、解决就业的作用;在研究孵

基于在孵企业观点的孵化服务重要性评估研究

将孵化服务分为八大类共66个具体项目,通过问卷调查收集在孵企业对各项孵化服务的需求信息,采用R id it方法进行排序。发现:在孵企业对孵化器提供的各项服务的需求是有差别的,被认为最重要的服务是孵化器提供的政策法律支持和财务及融资服务;在各具体服务项目中,在孵企业钟情于容易评估的服务项目,对那些可以自行解决的简单服务和不容易在短时期内见成效的服务项目普遍不感兴趣;不同行业的在孵企业对孵化服务的需求既有共同点也存在较多差异;以成立时间为基准分成的三组在孵企业在孵化需求方面并不存在大的差别。国家软科学研究计划(2004DGQ1D110

Exploitation of battery design database based on delphi structural language

用Delphi结构化语言实现了电池设计的数据库系统。知识库采用了Paradox数据库,链接了TTable和TQuery组件,为数据库提供了添加、修改和查询等强大功能。推理机采用精确计算与选择相结合的方法来确定符合条件的半反应电对。利用了面向对象的Windows编程方式,窗口界面友好直观和易于使用。而且系统安装后,可脱离Delphi独立运行。The database system for battery design was programmed using Delphi 7 structural language. A Paradox-type database was employed in the knowledge base, which provided strong function, such as appending, modification and search etc. To determinate the desire half equation, accurate computation combining with fuzzy selection was a dopted in the inference engine. The friendly window interfaces can be easily emploied since a windows-type OOD programming method was used. Moreover, after success setup, the database can disengage from Delphi and independently run.国家自然科学基金(20273053

铒、氧共注a-Si:H和a-SiCx:H的1.54μm光致发光

在a-Si:H和a-SiCx:H中共注稀土铒和氧。300 ℃和400 ℃热退火后,测得了来自发光中心Er~(3+)内层4f电子跃迁的1.54 μm光致发光。400 ℃是较好的退火温度。随着碳含量的增加,发光强度逐渐减弱,这可能是由于碳的引入减弱了间隙氧退火时的迁移能力所致

海洋立管涡激振动抑制的新方法

本文结合当前理论研究和工程界中使用过的VIV抑制设计,在讨论其优缺点的基础之上,提出了一套新的立管VIV抑制装置。数值模拟结果表明,新装置不仅可以减阻,也可以减轻旋涡脱落引起的振动。通过涡激振动的实验,结果表明,在结构固有频率和静止柱体下涡脱落频率相同时,新装置确实能有效降低结构涡激振动振幅

Application of alginate hydrogel as a delivery vehicle in tissue regeneration

Alginate is a class of linear hydrophilic polysaccharides found in brown algae.It is composed of repeating units of D-mannuronic acid (M) and L-guluronic acid (G) in different proportions.It is one of the natural biological materials used for hydrogel synthesis.Through simple ion cross-linking,it can react with Ca~(2+) and other multivalent inorganic cations to form hydrogel,which called egg box reaction.There are a large number of-OH and-COOH polar groups on the alginate skeleton,which can be modified by chemical or physical methods to achieve controlled release of cells or biologically active molecules in response to temperature,pH,light and other stimuli.At present,one of the main application strategies in the field of tissue regeneration is to use biocompatible materials,combined with bioactive molecules and cells,to promote the regeneration of damaged tissues.Hydrogel materials have the potential to protect embedded cells and mimic the natural extracellular matrix.Alginate is also widely used in the field of tissue regeneration due to its easy gelation and good biocompatibility.In this review,we summarized the different crosslinking methods of alginate hydrogels,focusing on the characteristics of alginate hydrogels that are responsive to stimuli and their applications as delivery vehicles in tissue regeneration

UBI-QEP Study on Purification of Vehicle Exhaust Gas

应用单位键指标%D二次指数势 (UBI QEP)方法对汽车尾气净化反应中氮氧化物的分解进行了理论分析 .结果表明 ,NOx 的分解的可能途径为氮氧化物的直接分解、CO还原助解和氮助解离 .在富氧条件下 ,以CO助解为主 .NO的解离存在N2 O中间态 .Ni与Rh一样 ,也是优秀的还原NOx 催化剂 ,若能有效克服表面氧的共吸附 ,Ni Cu可能是良好的汽车尾气净化催化剂的主体成份The Vehicle exhaust gas generally contains nitrogen oxides and the fossil fuel which do greatly harm to air environment. Although the use of catalytic converters for the vehicle gas has resulted in considerable progress in the past twenty years, a theoretical framework for explaining the experimental observations is still lacking. We use the UBI-QEP method to analyze the chemisorption species and calculate the energiti of elementary reactions on six metal single crystal surfaces, Pt(111), Pd(111), Rh(111), Ag(111), Cu(111) and Ni(111). It will help us to realize the reaction mechanism and choose the best suitable catalysts. The sequence of chemisorption heat for NO x is Ni>Rh>Cu>Pd>Pt>Ag. The dissociation of NO x decreases along the series Rh≈Ni>Cu>Pd>Pt>Ag. The decomposition of NO can easy happen via N 2O intermediate. From calculations at low coverage, we can see two possible pathways of NO x reduction, the direct dissociation and CO-aided dissociation. At high coverage, however, CO-aided dissociation is main pathway. For complete oxidation of carbon monoxide, Pt, Pd, Ag and Cu are fine catalysts, but both Ni and Rh can not promote it. The Ni-Cu-based catalysts may replace the noble metal catalysts (Pt-Pd-Rh).国家自然科学基金 (2 97730 37,2 99330 40 ,2 0 0 2 30 0 1);; 福建省自然科学基金 (E9910 0 0 1,E0 0 10 0 0 6 )资助项目~