2001年绵阳科学城地区辐射环境监测与质量评价

2001年绵阳科学城地区主要环境介质(大气、河水、土壤和沉降等)中放射性水平与科学城开工前天然本底辐射没有显著性差别。通过对每个核设施烟囱流出物的测量与估算,获得了烟囱排放源项数据。利用该地区的大气扩散模式和多烟囱排放的剂量叠加原理,在评价坐标系中计算了叠加剂量分布。辐射环境质量评价表明80km范围内最大个人有效剂量是公众剂量限值的十万分之四,健康危害是危害约束值的千万分之二。表明环境影响是微弱的,是人们可以接受的。     

基于Agent的遗传算法描述与演化模型研究

Agent是指具有智能的人或其它智能物.它具有自治、反响、推测、协作、自学习和相互学习等能力,本文基于Darwin自然进化论与Mendel遗传变异理论,给出Agent的遗传算法与演化模型.这些理论的提出,进一步丰富和完善了Agent的研究内容.     

ATM/SDH接口的管理:CLR QoS的在线监测

通信网的管理对服务质量至关重要。在实际的网络中,需要对各个子网和网络单元进行良好的管理和控制。 文章从系统的角度分析了ATM/SDH接口的管理,并着重讨论了CLR QoS在线监测问题。     

导控溢流阀动态数学模型的建立及动态性能分析

分析了导控型溢流阀的动态特性，建立了其运动状态的数学模型，并对微分方程进行拉氏变换，得出了动态系统的方框图。     

Influence of interfacial strength on the fracture toughness of glass-ceramic matrix composites

Nine kinds of glass-ceramic matrix composites with different compositions and interfacial strength (τ _s) were prepared. The influence of τ _s on the fracture toughness(K _1c) of composites was studied. It was discoved that, for the system no chemical reaction taking place at the interface, K _1c increased proportionally with τ _s increasing at the first stage, then decreased when τ _s reached a certain value. According to this result, a model of relationship between τ _s, thermal mismatch (Δα _r) and K _1c was built up. If a chemical reaction took place and a new phase was formed in the interface, the K _1c of composite was effected by the combination of τ _s, chemical bonding, radial interfacial stress and other factors. Project supported by the National Natural Science Foundation of China Synopsis of the first author Wang Lingsen, professor, born in 1938, current research field: special ceramic and ceramic matrix composite, etc.     

激光三角法位移传感器测头设计

本文以直射式激光三角测头为例,导出了满足Scheimpfiag成象条件下的待测面位移与象位移间的准确关系,作为仪器结构参数设计的基础,并对提高测量精度和实用性的各项改进设计进行了分析。     

信息转接死锁避免的动态优化算法

对于动态传输路径，给出了每个结点至少两个缓冲的信息转接网死锁避免问题，所提出的死锁避免算法从缓冲利用的角度看是优化的。同时给出了死锁无关的证明及其条件，这对于并行计算处理问题是有益的。     

嵌岩灌注桩的竖向承载力研究

结合实测和试验资料，从理论上分析嵌岩灌注桩竖向承载力问题，及其各种影响因素。归纳总结了确定嵌岩灌注桩的承载力方法。     

A simple adaptive PI controller for linear systems with constantdisturbances

It is known that an adaptive controller via high-gain output feedback can globally stabilize a class of minimum phase systems with relative degree one. However, exact output regulation is difficult for systems with disturbances. In this paper, we consider linear single-input/single-output (SISO) systems with unknown constant disturbances. We present a simple adaptive output feedback controller with an integral action and show that it can asymptotically stabilize those disturbed systems. The proposed PI type adaptive controller can also deal with the output tracking problem of a step reference     

光传送网的未来发展探讨

文章从网络结构与拓扑两个方面，重点对下一代光传送网进行了探讨，具体介绍了新兴的光传送网——自动交换光网络(ASON)结构及其关键协议，并从运营商和设备商两个不同角度，较为深入地探讨了现有网络向ASON过渡时所采用的策略。