CaO—SiO2—Na2O三元渣系的挥发率

采用失重法对ＣａＯ－ＳｉＯ２－Ｎａ２Ｏ三元渣系在不同温度下的挥发率进行了测量。结果表明，在烧结温度下，低熔点渣的挥发率呈三段式变化，而高熔点渣无此特性；当修正碱度Ｒ′＞１、成分固定时，只有在温度超过其流动温度时才能显著提高挥发率；温度一定时，挥发率随着碱度Ｒ及Ｎａ２ＣＯ３含量的增加而提高；当Ｒ′＜１时，温度、碱度、Ｎａ２ＣＯ３含量对挥发率的影响都不大。     

转炉炉役运行经济性的动态分析方法及应用

根据生产实践数据，对转炉炉役的经济性进行了动态分析。     

A test battery related to ergonomics of protective clothing

Specialised protective clothing, such as that worn by firefighters, is usually tested only to standards which give requirements for the materials used (e.g. EN469). However, this testing often neglects the effect the manufacturing process of the garment has on the material properties, the effects of clothing design, sizing and fit, as well as the interaction of the clothing with other components of the standard gear for the profession. Such effects can only be tested by looking at the protective gear as a whole. This paper deals with methods to do additional testing on protective garments with firefighter clothing as example. In other words, methods which go beyond EN469. Human subject tests for physiological load, heat protection, ergonomic design, loss of performance, rain/moisture protection and conspicuity/visibility of the clothing are described and proposed for evaluation of protective clothing in general and for further development of standards on firefighters' clothing.     

Balanced Scheduling toward Loss-Free Packet Queuing and Delay Fairness

In current networks, packet losses can occur if routers do not provide sufficiently large buffers. This paper studies how many buffers should be provided in a router to eliminate packet losses. We assume a network router has m incoming queues, each corresponding to a single traffic stream, and must schedule at any time on-line from which queue to take the next packet to send out. To exclude packet losses with a small amount of buffers, the maximum queue length must be kept low over the entire scheduling period. We call this new on-line problem the balanced scheduling problem (BSP). By competitive analysis, we measure the power of on-line scheduling algorithms to prevent packet losses. We show that a simple greedy algorithm is Θ(log m)-competitive which is asymptotically optimal, while Round-Robin scheduling is not better than m-competitive, as actually is any deterministic on-line algorithm for BSP. We also give a polynomial time algorithm for solving off-line BSP optimally. We also study another on-line balancing problem that tries to balance the delay among the m traffic streams.     

基于RBF神经网络的财产损失评估模型

为了减少灾害带来的损失,需要建立科学的财产损失评估模型来进行合理评估,有效指导保险公刮防灾减损工作的顺利进行。基于这个目的,总结了财产损失评估的研究现状,分析了已有几种评估方法,提出了基于RBF神经网络的财产损失评估方法,根据保险公司的特殊需求确定了以保险标的为评估对象,进行了模型建立和实际应用。     

Discontinuity, decision and conflict

Summary The motivation for this paper arises out of the authors experiences in modelling real decision makers where the decisions show not only a continuous response to a continuously changing environment but also sudden or discontinuous changes. The theoretical basis involves a parametric characterisation of the environment, a decision makers perception of it in terms of a twice differentiable Distribution Function and a bounded Loss Function. Under a specified, minimizing dynamic, the resultant Expected Loss Function satisfies the conditions for a potential function and Thoms Catastrophe Classification Theorem may be used to assess the singularity points and the thresholds at which jump decisions are taken. The paper describes the theory, summarises some results on unimodal distributions illustrated by jump decisions and population polarisation. Mixture distributions are then examined and the E^* models defined. These are then briefly illustrated by reference to models which have been constructed in relation to Prison Riots, Agricultural and Economic modelling.     

Coupling losses in a rectangular multifilamentary superconducting composite

Coupling current losses between filaments of a superconducting multifilament composite subjected to a transverse varying field is highly dependent on the shape of the conductor. The ac loss is evaluated in a conductor of rectangular cross sectional area. It is shown that the loss per unit volume is somewhat different from the loss in an elliptical shaped composite of the same aspect ratio. In addition, the loss in the outer copper sheath is less sensitive to the aspect ratio than the inner filamentary region. Numerous experimental results are given on losses in as-received conductors and in conductors where the outer copper sheath has been partially removed. The anisotropy in the losses caused by a changing field perpendicular or parallel to the wide side of a conductor is in very good agreement with the theory.     

公用电信网间接续质量的研究

“公用电信网间通信质量技术要求——电话呼叫的接通率和拨号后时延”是目前信息产业部已经制定的标准之一,该标准既适用于网间呼叫的接续质量评定,又便于管理部门对运营者网间通信质量进行考核。它包括3部分内容;第一部分规定了全程参考连接下的质量指标及其分配要求;第二部分规定了忙时的接通率和拨号后时延的指标,第三部分主要为网间互联互通通信质量的考核指标,是对电信运营企业在互联互通时,网间通信质量进行考核和管理的最低要求。     

阵列波导光栅插入损耗的降低

阵列波导光栅（AWG Arrayed Waveguide Grating）是实现多通道密集波分复用（DWDM Dense Wavelength Division Multiplexing)光网络的理想器件,插入损耗是它的一个重要性能指标。本文介绍了多种减小AWG插入损耗的方法,并在此基础上,分析了如何使用楔形波导结构来降低模式失配所导致的耦合损耗。这种方法可以在不增加器件制作难度的同时大大降低AWG的插入损耗,并且适用于各种材料和结构的AWG器件设计。     

悬重式抽聚泵理论示功图的绘制与分析

为了进一步探索悬重式抽聚泵的工作状况,从柱塞悬重式抽聚泵的工作原理入手,通过与相近工作制度的普通管式泵对比,采用定性与定量相结合的方法,详细计算和分析了在一个冲程之内,两种泵型的载荷变化规律和特点,给出了在比较理想的状态下抽聚泵的理论示功图。