论会计信息表外披露的必要性

分析与阐述了会计信息表外披露的必要性,说明了它在弥补现行财务报表信息披露的不足、促进证券市场的健康发展及新形势下增强商业银行的信息透明度与规范化运转等方面的作用。     

脊髓损伤药物治疗进展

脊髓损伤(Spinalcordinjury,SCI)是严重危害人类健康的疾病,其后果严重。根据其病理机制分为原发性损伤和继发性损伤两个阶段及脊髓横断伤、完全性脊髓损伤、不完全性脊髓损伤及脊髓震荡伤四型。SCI治疗的药物主要有:甲基强的松龙、神经节苷酯、细胞生长因子、抗氧化剂及钙通道拮抗剂等。治疗方法虽多,但其治疗效果并不十分理想。结合了SCI病理演变的特性,对目前药物治疗的研究进展进行概述并提出展望。     

氯霉素分子烙印固相萃取柱的制备及萃取条件优化

采用分子烙印技术制备了氯霉素的分子烙印固相萃取柱,并通过对其吸附能力、解吸条件等特性的研究,确定了分子烙印固相萃取柱的上柱、淋洗和洗脱条件．结果表明,与目前氯霉素检测中所采用的传统C18柱相比,分子烙印固相萃取柱可采用甲醇含量较高的甲醇／水混合溶剂作为淋洗溶剂,用乙腈含量为40％(体积分数)的乙腈／水作为洗脱溶剂,且比传统C18柱具有更大的柱容量．分子烙印固相萃取柱的优点使其可应用于实际生物样品中氯霉素的检测,以解决目前氯霉素残留检测中面临的难题．     

GMPLS控制面中的邻居发现和拓扑发现机制的改进研究

针对GMPLS控制面中邻居发现和拓扑发现机制的缺陷,尝试从2个方面对其加以改进。一方面,现有 LMP（链路管理协议）实现邻居发现机制时,会出现端口不一致的现象,导致不能绑定链路,通过增加消息使之可以 顺利进行链路绑定,从而减少了链路维护的开销;另一方面,使用OSPF协议进行拓扑发现时,由于现有的LSA（链 路状态公告信息）缺少对LSA更新时间、链路消耗等的支持,造成网络的链路拥塞、带宽利用率不高、节点对故障 敏感性差等问题,通过扩展sub—TLV类型!增加了对LSA更新时间、链路消耗、风险共享和层次属性的规定,从 而可以提高链路利用率,减少网络拥塞。     

广域网中网络拓扑算法研究

网络拓扑发现是网络管理系统中的一个重要组成部分。介绍了在广域网中用于拓扑发现的两种算法,即以CNRG算法为代表的基本算法和启发式算法,并比较了两者的发现结果。结果表明,启发式算法与基本算法相比,在高效性、完整性以及准确性方面都有所提高。     

基于时间差的无线传感器网络节点定位方法

在分析RSSI、ToA、TDoA和AoA测距方法优缺点的基础上,给出一种基于时间差的节点定位方法.该方法无需锚节点与锚节点之间,以及锚节点与目标节点之间的时间同步,根据三个锚节点的定位信号到达目标节点的时间差,即可完成对目标节点的定位.以三个锚节点呈等边直角三角形布置为例,对定位误差进行计算并得出了提高目标节点时钟精度和增加锚节点之间的距离可减小定位误差的结论.最后,利用无线传感器网络测试床进行算法有效性验证,结果表明了所提定位算法的有效性.     

Integrated knowledge-based modeling and its application for classification problems

Knowledge discovery from data directly can hardly avoid the fact that it is biased towards the collected experimental data, whereas, expert systems are always baffled with the manual knowledge acquisition bottleneck. So it is believable that integrating the knowledge embedded in data and those possessed by experts can lead to a superior modeling approach. Aiming at the classification problems, a novel integrated knowledge-based modeling methodology, oriented by experts and driven by data, is proposed. It starts from experts identifying modeling parameters, and then the input space is partitioned followed by fuzzification. Afterwards, single rules are generated and then aggregated to form a rule base, on which a fuzzy inference mechanism is proposed. The experts are allowed to make necessary changes on the rule base to improve the model accuracy. A real-world application, welding fault diagnosis, is presented to demonstrate the effectiveness of the methodology.     

Adult hippocampal neurogenesis: regulation by HIV and drugs of abuse

New dentate granule cells are continuously generated from neural progenitor cells and integrated into the existing hippocampal circuitry in the adult mammalian brain through an orchestrated process termed adult neurogenesis. While the exact function remains elusive, adult neurogenesis has been suggested to play important roles in specific cognitive functions. Adult hippocampal neurogenesis is regulated by a variety of physiological and pathological stimulations. Here we review emerging evidence showing that HIV infection and several drugs of abuse result in molecular changes that may affect different aspects of adult hippocampal neurogenesis. These new findings raise the possibility that cognitive dysfunction in the setting of HIV infection or drug abuse may, in part, be related to alterations in hippocampal neurogenesis. A better understanding of how HIV and drugs of abuse affect both molecular and cellular aspects of adult neurogenesis may lead to development of more effective therapeutic interventions for these interlinked epidemics. Received 6 February 2007; received after revision 26 March 2007; accepted 25 April 2007     

54例住院患者单日用药的合理性分析

为了解心内科、骨科住院患者单日的用药情况,评判两科药物使用的合理性,应用“合理用药监测软件系统（PASS系统）”对住院患者的用药进行了分析,共监测54名患者329条医嘱。结果是54名住院患者在住院期间共使用药物316种,在329条医嘱中,不合理用药均为心内科用药。通过对网科用药的分析,表明临床应加强对合理用药的监测,尽量减少用药品种,避免不合理的联用．以有助于提高住院患者的合理用药水平。