一个有效的圆片规模布局算法

本文提出了一个圆片规模布局算法，它是国外一个相应算法的改进形式，区别在于利用力定向布局法的方式不同。在相对位置阶段，该算法利用布局的层次特性将需确定所有电路元件相对位置的问题缩减至仅需确定宏电路元件相对位置的问题；在实际位置阶段，采用分治策略和取消前阶段层次划分的方式回避了需确定任意元实际位置的问题．其时间复杂度远低于国外相应算法．     

On the Yustova threshold plates

A response to criticism of threshold plates for the study of color vision developed at the Mendeleev All-Russia Research Institute of Metrology and published in 1994 is presented. The critics base their conclusions on colorimetric testing and the examination of the plates. In response to the article by M. V. Danilova and J. D. Mollon [4]. __________ Translated from Izmeritel’naya Tekhnika, No. 1, pp. 37–39, January, 2007.     

XC型车号自动识别系统在轨道衡的应用

介绍了XC型车号自动识别系统的工作原理及在轨道衡的应用,解决了长期以来轨道衡路用车车号和自重依靠人工抄录易出错及劳动强度大的问题。     

Assessing the performance of intumescent coatings using bench‐scaled cone calorimeter and finite difference simulations

A method was developed to assess the heat insulation performance of intumescent coatings. The method consists of temperature measurements using the bench‐scaled experimental set‐up of a cone calorimeter and finite difference simulation to calculate the effective thermal conductivity dependent on time/temperature. This simulation procedure was also adapted to the small scale test furnace, in which the standard time–temperature curve is applied to a larger sample and thus which provides results relevant for approval. Investigations on temperature and calculated effective thermal conduction were performed on intumescent coatings in both experimental set‐ups using various coating thicknesses. The results correspond to each other as well as showing the limits of transferability between both fire tests. It is shown that bench‐scaled cone calorimeter tests are a valuable tool for assessing and predicting the performance of intumescent coatings in larger tests relevant for approval. The correlation fails for processes at surface temperatures above 750°C, which are not reached in the cone calorimeter, but are attained in the small scale furnace set‐up. Copyright © 2006 John Wiley & Sons, Ltd.     

高等院校贷款的规模控制

我国高等教育事业发展受到资金短缺制约,高等院校金融贷款成为资金来源多渠道化之一。本文就高校取得金融机构资金支持的可行性,高等院校利用信贷资金规模控制提出笔者个人看法,认为高等教育的发展使得高校利用金融机构贷款具有现实可能性;信贷资金规模控制需要合适的财务指标体系来控制。     

氧化镧中放射性的去除——Ⅳ.P_(507)-HNO_3体系萃取法去除氧化镧中放射性的扩大试验

本文给出了在P_(507)-HNO_3体系中去除氧化镧中放射性的工艺流程及用混合澄清槽作为萃取设备,在上海跃龙化工厂完成的扩大试验结果。试验表明:α放射性、铁和钙的去污系数都大于1000,镧的回收率大于96％,产品中α放射性小于1计数/h,Fe_2O_3<5ppm,CaO<50ppm,达到了荧光级氧化镧的要求。该流程操作简便、设备简单、稳定性好,可以应用于工业生产。     

HHD型核子秤电离室物理性能检测

HHD型核子秤电离室已成功地使用于HCS型核子秤.对它的各种物理性能指标进行了检测,各项性能指标都达到了设计要求。     

Oxidation behavior of silicide coating on Ti3SiC2-based ceramic

A silicide coating was prepared on Ti₃SiC₂-based ceramic by pack cementation to improve the oxidation resistance of Ti₃SiC₂, which is a technologically important material for high temperature applications. The microstructure, phase composition and oxidation resistance of the coated sample were investigated. The results demonstrated that the silicide coating was mainly composed of TiSi₂ and SiC. A single layer of a mixture of SiO₂ and TiO₂ was formed on the surface of the coated sample during isothermal oxidation at 1100 °C and 1200 °C for 20h. Compared to Ti₃SiC₂, the parabolic rate constant of silicide coated Ti₃SiC₂ decreased by 2~3 orders of magnitude. Furthermore, the coated sample showed much better cyclic oxidation resistance than Ti₃SiC₂ during the cyclic oxidation at 1100 °C for 400 times. However, during the preparation of the coating, a number of fine cracks formed in the outer layer of the coating. When these cracks penetrated the whole coating during the cyclic oxidation, the oxidation rate was accelerated, which degraded the oxidation resistance. Electronic Publication     

1000m~3/h空分设备板翅式换热器带水冻堵故障处理

介绍 10 0 0m3 /h空分设备板翅式换热器循环水加杀菌剂产生泡沫 ,引起空冷塔雾沫夹带而严重带水冻堵的故障现象、原因及处理措施 ,并指出运行中的不足。     

多用途放射性废物焚烧系统工程验证试验

对建立的多用途放射性废物焚烧系统，进行了工程验证试验。试验主要包括固体废物（包括树脂）和废油焚烧及烟气净化时系统的性能测定、非放示踪试验、72h连续运行考验等。经过共计500多小时的试验，验证了工艺流程、主要设备结构、仪表测控及系统安全等设计的可行性和可靠性；系统运行平稳，设备及仪表工作正常。本系统可一炉多用，其处理能力、减容系数、焚烧灰中残炭率以及系统总去污系数等指标，均达到了设计要求。