心脏机械瓣替换术后抗凝治疗的研究

目的：研究机械瓣替换术后抗凝治疗期间并发症的发生率及分布规律、调整抗凝药的用量。方法：对167例心脏机械瓣替换术的病人进行1～8年的凝血酶原时间随访研究。结果：血栓率0．72％病人·年；出血率9．21％病人·年。血栓集中在非风湿性心脏病及倾斜机械瓣置换者；出血集中在风湿性心脏病及术后心功能不全、肝瘀血者。结论：抗凝治疗期间注意了解病人的心功能、肝功能情况，对不同的人群，采用不同的凝血酶原时间比值，抗凝期间进行中、小手术时采用停服抗凝药三天的方法有较好的效果。     

偶偶核166Hf高自旋态的微观描述

从壳模型组态及核子－核子有效相互作用出发，用一种在截断的态空间中研究偶偶核高自旋态的理论方案，以偶偶核＾１６６Ｈｆ为对象作了计算和讨论。结果表明，该理论方案很好地描述了稀土区偶偶核高自旋态的性质。     

圆筒燃烧室旋流流场的研究

本文介绍圆筒燃烧室内双股同心旋转射流物理模型实验与数值模拟的研究结果。数值模拟按著者最近提出的湍流涡量输运方程,采用ψ-ω方法及K-ε湍流双方程模型,Rodi提出的壁函数,以及Spalding教授等提出的计算湍流回流的方法。本文工作表明,用涡量—流函数法及K—ε双方程模型计算强旋流及回流是可行的。     

Identification and gene mapping of a narrow and upper-albino leaf mutant in rice (Oryza sativa L.)

The leaf blade consists of color and shape traits. Studies of leaf-blade development are important for improvement of rice yield and quality because it is an essential organ for photosynthesis. A narrow and upper-albino leaf mutant (nul1) was identified from among progeny of the indica restorer line Jinhui10 raised from seeds treated with ethyl methane sulfonate. Under field conditions, the mutant displayed narrow and upper-albino leaf blades with significantly decreased photosynthetic pigment contents throughout their development. The narrow-leaf trait is caused by a decreased number of small veins. In contrast to the wild type, the growth period was extended by approximately 8 d and agronomic traits, such as effective panicle number, percentage seed set and 1000-grain weight, declined significantly in the nul1 mutant. Genetic analysis suggested that the narrow and upper-albino leaf characteristics showed coseparation and were controlled by one recessive gene. The Nul1 gene was mapped onto chromosome 7 between the Indel marker Ind07-1 and the Simple Sequence Repeat marker RM21637. The physical distance between the markers was 75 kb and eight genes were annotated in this region based on the rice Nipponbare genome sequence. These results provide a foundation for cloning and function analysis of Nul1.     

The Absolute and Its Measurement: William Thomson on Temperature

In this paper we give a full account of the work of William Thomson (Lord Kelvin) on absolute temperature, which to this day provides the theoretical underpinnings for the most rigorous measurements of temperature. When Thomson fashioned his concepts of ‘absolute’ temperature, his main concern was to make the definition of temperature independent of the properties of particular thermometric substances (rather than to count temperature from an absolute zero). He tried out a succession of definitions based on the thermodynamics of ideal heat engines; most notably, in 1854 he gave the ratio of two temperatures as the ratio of quantities of heat taken in and given out at those temperatures in a Carnot cycle. But there were difficulties with using such definitions for experimental work, since it was not possible even to approximate an ideal Carnot engine in reality. More generally, it is not trivial to connect an abstract concept with concrete operations in order to make physical measurements possible. In the end, Thomson argued that an ideal gas thermometer would indicate his absolute temperature, and that the deviation of actual gas thermometers from the ideal could be estimated by means of the Joule‐Thomson effect. However, the measurement of the Joule‐Thomson effect itself required measurements of temperature, so there was a problem of circularity.     

一种自适应的机载无源－光电对抗系统

机载雷达警戒设备与箔条／红外弹投放器相综合，构成兼有警戒与无源－光电干扰功能的自卫型电子战系统，可显著地提高载机的作战效能。而程控接口则是实现其组合的关键。本文在完成样机并取得满意的实验效果基础上，对一种实用的程控接口进行了综合分析与论述，阐明了用于控制箔条／红外弹投放的软件流程及其投放编码字，给出了投放状态检测电路、投放命令发送电路和相应的投放序列。同时，还对本程控接口的推广应用及飞机改装等可行性问题进行了简要论证。     

以8031单片机为核心的智能存储器系统的设计

利用８０３１单片机数据存储器扩展技术及串行口扩展技术，实现数据的自动采集、存储及传输     

化学化工实验废水排放的监测分析与治理实践

以广西大学化学化工实验大楼排放的实验废水为例,对其水质进行为期半年的监测.监测结果表明:该水的有机物含量不高但排水量大;有代表性的重金属污染中,Hg的平均含量约为0.015 m g/L、C r平均含量低于0.1 m g/L,两者均低于《城市污水综合排放标准》(GB 8978-1996).根据监测结果,提出采用厌氧生物滤池对实验废水进行初步处理,处理后的废水可直接排入市政管道,不会对环境造成不良的影响.     

关于整函数和亚纯函数的代数相关

本文将ＦＧＲＯＳＳ关于两个亚纯函数代数相关定理作一推广，给出了两个亚纯函数在级罗低的亚纯函数域上的代数相关性，并讨论了整函数的情形。     

一种新的蔡氏混沌掩盖通信方法

提出了一种传输较大幅度信息信号的混沌掩盖保密通信方法。由于信息信号的幅度可以与混沌信号相当 ,从而提高了保密通信的安全性 ,改善了解密后信号的信噪比。在接收端 ,采用一个自适应线性神经元 (Ada line)来维持收发系统的混沌同步 ,并通过逆系统恢复出信息信号。当混沌系统一定时 ,同步误差及恢复信号的精度随信息信号频率的降低而提高。以蔡氏电路为例 ,给出了理论分析和数值模拟的结果