Turbo Pascal的并发程序单元

对用Turbo Pascal3.0实现的并发设施作了修改,修改后的子程序收入两个外部程序单元。它们可供Turbo Pascal 4.0及以上版本成功地调用。     

芭蕉芋生产葡萄糖浆的研制

本文介绍了采用α－淀粉酶、葡萄糖淀粉酶双酶法生产工艺，直接从鲜芭蕉芋（Ｃａｎｎａｅｄｕｌｔｓ）块茎生产葡萄糖浆的方法。该法降低了原料成本，工艺操作容易，设备要求不高，葡萄糖转化率高，产品增值优于其它芭蕉芋制品。     

PbI_2纳米超微粒的制备与表征

讨论了ＰｂＩ＿２超微粒的二种化学制备方法，并用紫外－可见光谱、光电子能谱、Ｘ光小角散射等手段对其进行了表征。     

侗族"矮脚楼"演进模式新探——湖南会同高椅村建筑演变分析

侗族“矮脚楼”的产生模式一般被认为是侗族典型干栏式建筑“高脚楼”受汉文化影响变化的结果。本文中以湖南会同高椅村为例,分析其村落布局及单体建筑从南方天井式民居到侗族“矮脚楼”的演变过程,并以此作为侗族“矮脚楼”产生的另一种模式。     

有机化合物选择性氧化的研究——三氧化铬盐酸乙二胺盐酸盐的制备及对醇类的氧化

包括三氧化铬盐酸乙二胺盐酸盐的制备和它在DMF中对醇类的氧化性能,发现作为一种新的、温和的氧化剂,它仅能氧化苄醇、烯丙醇和环醇类生成相应的羰基化合物,对其它的链状饱和醇则不氧化。     

非线性材料压杆的后屈曲分析

本文在考虑材料非线性和几何非线性的情况下,分析建立了受轴向均布载荷压杆的欧拉驻值条件,用摄动法摄动求解非齐次Bessel方程,得出了问题的近似解,并着重对松木柱的后屈曲特性作了探讨。     

Engineering a mouse balancer chromosome.

Balancer chromosomes are genetic reagents that are used in Drosophila melanogaster for stock maintenance and mutagenesis screens. Despite their utility, balancer chromosomes are rarely used in mice because they are difficult to generate using conventional methods. Here we describe the engineering of a mouse balancer chromosome with the Cre-loxP recombination system. The chromosome features a 24-centiMorgan (cM) inversion between Trp53 (also known as p53) and Wnt3 on mouse chromosome 11 that is recessive lethal and dominantly marked with a K14-Agouti transgene. When allelic to a wild-type chromosome, the inversion suppresses crossing over in the inversion interval, accompanied by elevated recombination in the flanking regions. The inversion functions as a balancer chromosome because it can be used to maintain a lethal mutation in the inversion interval as a self-sustaining trans-heterozygous stock. This strategy can be used to generate similar genetic reagents throughout the mouse genome. Engineering of visibly marked inversions and deficiencies is an important step toward functional analyses of the mouse genome and will facilitate large-scale mutagenesis programs.     

An SSLP marker-anchored BAC framework map of the mouse genome

We have constructed a BAC framework map of the mouse genome consisting of 2,808 PCR-confirmed BAC clusters, using a previously described method. Fingerprints of BACs from selected clusters confirm the accuracy of the map. Combined with BAC fingerprint data, the framework map covers 37% of the mouse genome.     

浅析抗震设计中短柱问题及其防治

在历次地震灾害中,根据对灾区大量的房屋建筑的研究调查,房屋中大量出现由于形成短柱而产生的破坏。文章叙述了形成短柱的原因,明确了短柱的判定方法,并提出了一些处理措施。从而提高建筑物的抗震性能,避免发生脆性破坏,达到抗震设计的基本要求。     

Duffing方程在两类共振条件下的周期解分支与混沌

应用常规扰动方法与二阶平均方法,研究在两类共振条件Ω∶ω∶ω0=2∶3∶1和1∶1/2∶1下Duffing方程的周期解及其分支存在的充分条件.通过数值模拟不仅验证了理论分析的正确性,而且发现了新的复杂行为,如周期2分支和逆周期2分支到混沌,混沌突然收敛到周期1,3轨,周期1轨的跳跃行为等.