The localization of type 2 diabetes susceptibility gene loci in northern Chinese Han families

We conducted a genome-wide scan, in which 358 well distributed fluorescent dye-labeled microsatellite marker sets were applied in 32 Chinese Han type 2 diabetes families from Northern China to search for the susceptibility gene loci. The data collected from screening all the chromosomes of genome were genotyped by using genescan and genotyping software, then, parametric and non-parametric multipoint test, and affected sib-pair analysis as well, were used to analyze the data. We identified some susceptibility gene loci residing in chromosomes 1, 12, 18, 20, respectively, or precisely, located around D1S214, D1S207, D1S218, D1S235, D12S336, D18S61 and D20S118. The comparison of this result with those from other regions and races reflected the complexity and heterogeneity of type 2 diabetes.     

10MN液压机液压缸系统的故障树分析

根据国产10MN水压机液压系统可靠性分析和系统改造的结果，建立起新液压机主缸系统及压边缸系统的故障树并对其进行定性及定理分析，提出了保证新系统达到预计可靠的措施。实践证明新系统是可靠的。     

黄土丘陵坡面三维形态初论

根据对黄土丘陵坡面的野外观察,提出三维坡形的概念,从三维空间考察斜坡,划分出九种基本三维坡形,论述其发育的基础及其与坡面侵蚀的关系。     

二维熵阈值分割的快速算法

提出了一种快速二维熵阈值分割方法，将计算复杂性从一般二维熵方法的Ｏ（Ｌ）减少至Ｏ（Ｌ＾２）实验证明，对每一幅图象运算时间从２ｈ以上降至１０ｓ以内，同时计算所需存贮空间也大大减少，该算法提高了计算效率。     

钙处理对贮藏过程中的荔枝果品质的影响

我们试图从生物体内离子平衡的角度来研究果实采后的衰老过程，荔枝采后经不同的钙处理，其品质的多项指标在贮藏过程中发生不同的变化。结果表明，适当浓度的钙处理，打破了机体原有的离子平衡，但能及时建立起新的平衡，以适应机体已减缓了的但属正常范围的生理生化过程的需要，达到荔枝果实保持优良品质，延缓衰老的目的。     

异佛尔酮类镉配合物的晶体结构及荧光性质

将(E)-2-(3-(4-(1H-三唑-1-基)苯乙烯基)-5,5-二甲基环己基-2-烯亚基)丙二腈(L)与Cd(OAc)2、CdI2自组装制备了配合物[CdL2(OAc)2]·2H2O(1)和CdL2I2(2)。运用X射线单晶衍射仪测定了配合物1和2的结构。配合物1为三斜晶系,中心Cd原子采取六配位模式,即与2个配体的氮原子、2个CH3COO-和2个H2O分子中的氧原子形成一个拉长的近似正八面体。而配合物2为单斜晶系,Cd原子采用四配位模式,与2个配体的氮原子和2个I-形成V型分子。这些分子通过分子间的氢键和π-π相互作用形成多维超分子结构。荧光和热重分析表明,1和2具有较强的荧光和较好的热稳定性。     

基于小波变换的纹理图像分割

Ｍａｌｌａｔ非正交小波变换通常用于光滑图像的边缘提取,本文将其改进后,推广到图像纹理特征的提取和纹理图像的分割,取得了良好的效果。基于小波变换的纹理图像分割的算法中,小波变换尺度数的选取和纹理聚类数的确定是其难点。对此,本文作了详细的讨论,提出了一些独特、有效的解决方法。     

基于遗传寻优的刚体运动参数估计方法

提出一种基于最小截平方和参数估计算法,并采用遗传算法寻优,能自动剔除采样点集中的出格点,具有较强的鲁棒性,实验结果表明：该方法能够有效地克服由于出格点产生的误差,准确地估计出刚体空间运动的参数,并且不需要任何先验知识。     

Combustion forming hollow nanospheres as a ceramic fortress for flame-retardant fiber

Simple, effective and safe flame retardants are required to improve flame retardant properties of polymer fibers.However, traditional additive flame retardants, such as halogen-flame retardants and intumescent flame retardants, are likely to cause phase separation of functional phases due to their poor dispersibility and compatibility, or are difficult to be suitable for the high temperature processing conditions of melt-spun fibers. Here, in an effort to develop a practical flame retardant system in which zinc diphosphinate(DEPZn) and D-glucose(DG)were selectively incorporated into polyethylene terephthalate(PET) fiber was developed. As a result, the dense nano-scale zinc phosphate microspheres were formed on the surface and inside the residual carbon during combustion. Thus, PET fibers were endowed with excellent flame retardancy through a thermal barrier and enhancement of physical strength for the carbon layer. Moreover, a synergistic flame-retardant effect was found between DEPZn and DG. DG reduced the size of the zinc phosphate nanosphere from 200 nm to 50 nm, making the carbon layer denser and smoother. As a result, the peak heat release of the resultant PET composite fiber decreased to 410 k W/m~2 compared 1276 k W/m~2 for neat PET fiber. Moreover, the total smoke release also dropped from 71 MJ/kg of neat PET fiber to 64 MJ/kg for PET composite fibers. These results provide a promising strategy for the production of industrialized PET flame retardant fibers.