Synthesis and magnetic property of a nitroxide based on C60

The compounds containing stable nitroxide radicals possess magnetic properties for the free radical have net magnetic moment. Oxidization of the [60]fulleropyrolidine obtained from the reaction of C60 with diketone and 2-aminoisobutyric acid by m-chloroperoxybenzoic acid gives a new nitroxide integrated with C60. The stable nitroxide based on C60 is confirmed to be antiferro- magnetism with quantum design superconducting quantum interference device (SQUID).     

七层KP_1型烧结页岩粉煤灰多孔砖房屋非线性地震响应分析

根据墙片抗震试验结果，运用非线性时程分析程序对一栋七层的烧结页岩粉煤灰多孔砖房屋进行了计算．计算结果表明该种砌体房屋具有良好的抗震性能．     

三氯化钐促进的芳香胺对氮丙啶的开环反应

芳香族胺在三氯化钐催化下与环丙啶反应，得到了１，２－二胺类混合物；并研究了溶剂、温度及不同稀土三氯化物对反应的影响。     

新型多氟氮超酸镧系金属盐的Lewis 酸性研究

合成了若干新的多氟氮超酸的镧系金属盐，并用 IR，     

The molecular basis and clinical aspects of Peutz-Jeghers syndrome

Peutz-Jeghers syndrome (PJS) is a classic, but not widely known hereditary trait. Its clinical hallmarks are intestinal hamartomatous polyposis and melanin pigmentation of the skin and mucous membranes. In addition, PJS predisposes to cancer . The most common malignancies are small intestinal, colorectal, stomach and pancreatic adenocarcinomas. Other cancer types that probably occur in excess in PJS families include breast and uterine cervical cancer, as well as testicular and ovarian sex cord tumors. The relative risk of cancer may be as high as 18 times that of the general population, and the cancer patients' prognosis is reduced. Recently, the predisposing locus was mapped to 19p13.3 using a novel method. Subsequently, the causative gene was shown to be LKB1 (a.k.a. STK11), a serine/threonine kinase of unknown function. Although preliminary reports seem to suggest a minor role for LKB1 in sporadic tumorigenesis, further investigations are needed. Received 12 October 1998; received after revision 30 November 1998; accepted 30 November 1998     

关于几何过程的一个注记

求出了几何过程中在时刻ｔ最后的更新时刻ＳＮ（ｔ）和包含ｔ的更新区间ＸＮ（ｔ）＋１的分布，使得更新过程中相应的结成特殊情况。     

二元羧酸脱羰端烯化反应研究

研究了壬二酸和癸二酸在催化量的双三苯基膦二氯化钾催化下的脱羰反应，考察了反应温度，醋酐用量以及催化剂用量对反应的影响，首次实现催化量的双三苯基膦二氯化钯－三苯基膦催化体系对壬二酸和癸二酸脱羰得到相应的1，6－庚二烯和1，7－辛二烯。     

基于小波特征匹配的短时人体行为识别

在人体行为识别研究中，特征选取是关键。为了获取充分且稳定的行为特征，往往对超过一个行为周期的长时行为数据进行处理，而小于一个行为周期的短时行为数据特征通常不稳定，难以做到准确稳定识别。提出一种基于小波变换和模板匹配相结合的短时人体行为识别方法。使用小波变换方法提取系数特征，将短时测试样本的特征与模板库中的特征进行匹配，根据相似性对行为动作做出分类识别。实验结果表明，此方法对于短时行为动作具有较为准确和稳定的识别性能，有助于实现对人体行为动作的实时识别。     

带有启动时间的GI/G/1排队系统的扩散逼近

为了刻画通信网络中自动请求重发(automatic repeat request,ARQ)通信协议,将其模型化转为一个带有启动时间的GI/G/1排队系统。首先建立了服务员的闲期所满足的上下界函数关系,后利用此关系证明了该排队系统队长、负荷和忙期过程的扩散逼近,近似刻画了系统指标。     

基于PC104总线的航电模拟器设计与实现

针对飞行器飞控系统试验中对航电设备的仿真需求,设计了基于PC104总线架构的航电模拟器,其性能可靠,而且扩展方便,易于实现较强的航电信号仿真功能,同时其结构紧凑,适合便携式仪器设计.作为一个应用实例,详细阐述了整个系统的框架结构及相应的软、硬件设计思路,并在此基础上给出了部分原理图.