6-羧基壳聚糖凝胶珠及其吸附尿毒症低分子毒物研究

用NO2将壳聚糖6位羟甲基氧化成羧基,再以戊二醛作交联剂制备了具有较高强度的6羧基壳聚糖凝胶珠。SEM观察确认凝胶珠表面均匀分布许多“沟槽”。凝胶珠对尿毒症低分子毒物尿酸、马尿酸和肌酐的吸附量分别为2.61、1.5和0.81mg/g;几乎不吸附牛血清蛋白、尿素、肌酸。富含低分子毒物的血清经凝胶珠吸附后,其尿酸和马尿酸的含量可接近人体液正常值。     

Diagnostic categories or dimensions? A question for the Diagnostic and statistical manual of mental disorders--fifth edition.

The question of whether mental disorders are discrete clinical conditions or arbitrary distinctions along dimensions of functioning is a long-standing issue, but its importance is escalating with the growing recognition of the frustrations and limitations engendered by the categorical model. The authors provide an overview of some of the dilemmas of the categorical model, followed by a discussion of research that addresses whether mental disorders are accurately or optimally classified categorically or dimensionally. The authors' intention is to document the importance of this issue and to suggest that future editions of the Diagnostic and Statistical Manual of Mental Disorders give more recognition to dimensional models of classification. They conclude with a dimensional mental disorder classification that they suggest provides a useful model. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

One‐Dimensional Assemblies of Nanoparticles: Preparation,Properties, and Promise

Nanoparticle (NP) assemblies are of considerable interest for both fundamental research and applications, since they provide direct bridges between nanometer‐scale objects and the macroscale world. Unlike two‐dimensional or three‐dimensional NP assemblies, which have been extensively studied and reviewed, reports on one‐dimensional (1D) NP assemblies are rather rare, even though these assemblies are likely to play critical roles in the improvement of the efficiencies of various electronic, optoelectronic, magnetic, and other devices based on single NPs or their composites. Additionally, 1D assemblies of NPs, i.e., chains, can significantly help in the understanding of a number of biological processes and fundamental quantum mechanics of nanometer‐scale systems. The difficulties are very evident when one wants to realize anisotropic 1D assemblies from presumably isotropic, zero‐dimensional NPs. In this context, the authors present a systemic review of current research on 1D NP assemblies. Their preparation methods are classified and novel characteristics of NP chains, such as collective properties and directional transfer of photons, electrons, spins, etc., are elucidated. Current problems underlying the fundamental research and practical applications of 1D NP assemblies are also addressed.     

结合语言的三维功能教语法

语法教学是外语教学中一个很重要的组成部分。语言是交际的工具，语法能力是交际能力的一个重要部分。教师应按照语言的结构—语义、语用，即语言的三堆功能设计语法教学活动，以真正达到培养交际能力的目的。     

Authenticated encryption schemes with message linkages for message flows

Two efficient authenticated encryption schemes with message linkages are proposed. One is a basic scheme, that it has the better performance in comparison with the all previously proposed schemes in terms of the communication and the computation costs. However, it has a property as same as the previously proposed schemes, that the message blocks can be recovered only after the entire signature blocks have been received. Therefore, the basic scheme is applicable to encrypt all-or-nothing flow. Thus, we improve the basic scheme and also propose a generalized scheme, which allows the receiver to recover the partial message blocks before receiving the entire signature blocks. That is, the receiver may perform the receiving and the recovering processes simultaneously. Therefore, the generalized scheme is applicable to message flows. The generalized scheme requires smaller bandwidth and computational time as compared to the previously proposed authenticated encryption schemes with message linkages for message flows.     

一类分布参数系统的反馈能稳性

研究了一类分布参数系统在有限维输出反馈下的指数能稳性,用构造有限维观测输出反馈控制器的方法,得到这一类系统反馈指数能稳的充分条件.     

由三维实体模型绘制组合体的"三视图"

本文研究在AutoCAD中由组合体的三维实体模型 ,通过投影转化获得组合体三视图的方法。采用这种方法绘制的三视图 ,与其三维实体之间具有内在的关系 ,所以不容易遗漏图线和产生投影错误 ,而且绘图效率较高     

整体预应力板(梁)柱体系抗震性能研究

通过振动台实验和三维有限元分析两种方法，对整体预应力板(梁)柱体系模型进行抗震性能研究，介绍了两种方法所得出的主要结论，并进行了比较，在此基础上对该体系的抗震性能做出了评价．     

肝脏血管的医学图象三维重建

提出了一种体素三维重建快速算法，它根据三维空间中体素相邻的定义，把体素表面元素的相邻与环绕体素表面的环路相关，重新进行了目标表面的描述，并对人体肝脏ＣＴ图象进行了三维重建和显示，得到了直观的肝脏门静脉的分支和走向图象，达到了无损伤的解剖的目的。为肝脏病变的ＣＴ、ＭＲＩ等定位诊断，定向介入治疗以及规则性肝叶、肝段切除提供了实验依据和理论基础。     

任意偏移矢量分布的N维CMAC映射算法及其应用

给出任意偏移矢量分布的Ｎ维ＣＭＡＣ映射算法，并将其成功地应用于Ｐａｒｋｓ和Ｍｉｌｉｔｚｅｒ给出的改进偏移矢量分布的多变量ＣＭＡＣ，进而获得高效的Ｎ维ＣＭＡＣ算法，给出了Ｐａｒｋｓ和Ｍｉｌｉｔｚｅｒ表与本文算法的转换原则和算法。