圩区排涝模数计算方法研究

合理确定圩区排涝模数对于降低涝灾损失有重要意义。圩区内土地利用性质的不同,会导致产汇流机制和排涝标准的不同,但排涝模数的计算方法基本一致。本文根据圩区下垫面条件进行产汇流计算,入河流量扣除滞蓄量得到排涝模数,充分考虑到圩内河道的调蓄作用。以常熟市为例,对城镇圩区、农业圩区排涝模数进行计算,并分析了两种圩区不同的排涝要求对排涝模数计算方法的影响。     

Development of a thermal hydraulic analysis code for gas-cooled reactors with annular fuels

Gas-cooled reactors have been highlighted as a promising option for next generation reactor technology. A thermal hydraulic analysis code for gas-cooled reactors has been developed with a heat transfer model of a block element, which is solved implicitly with the helium energy equation. Validation was carried out through comparison with both experimental and analytical results. A computation module for annular fuel rods has been coupled to the code for comparative analyses of an annular fuel-based block element. At normal operation, the annular fuel shows 80 °C lower peak temperature than the solid fuel for the same power in Japan's high temperature engineering test reactor (HTTR), even though the pressure drop is higher in the annular fuel.     

薄相屏闪烁的数值分析

本文在弱闪烁条件下，利用广泛适用于星际闪烁、行星际闪烁和电离层闪烁的薄相屏理论，以行星际闪烁为算例，对薄相屏闪烁进行了数值分析。结果表明：垂直于介质运动方向上的不规则结构的大小对闪烁有着重要的影响，直接表现在频谱的变化趋势和振荡幅度的不同。尤其是当小于Ｆｒｅｓｎｅｌ尺度时，数值计算表明此时没有闪烁发生。     

提高振动放矿使用寿命的途径

振动放矿使用寿命的提高，是关系到该项技术能否进一步推广的关键，本文针对这一问题，着眼于实际存在的具体问题，结合多年的应用实践，分析了影响使用寿命的各种因素，按治本与治标相结合的原则，提出了提高使寿命的若干有效途径。     

RS码频域编译码的计算机模拟

频域编译码是近年来由Ｂｌａｈｕｔ等人提出来的纠错码编译方法。本文介绍了在时域和频域编译ＲＳ码的基本方法，并给出了在移动信息道的简单分群Ｍａｒｋｏｖ模型下频域编译码的计算机模拟方法和结果。     

涂料江湖风云变之洋涂料也来凑热闹

近来的涂料江湖真是热闹，闹得沸沸扬扬的国标与京规之争、被人津津乐道的喝涂料促销手段、某企业叫板涂料国标之后，现在，连洋涂料也来凑热闹了。以偏概全受株连，　冤枉！　　9月5日，瑞典福乐阁涂料公司在北京向各媒体发布了一封公开信，称广州一家媒体在披露某些进口涂料有害物质严重超标时，没有具体指出有害涂料的名称，而是笼而统之的以“进口涂料”来概括，从而使在欧洲市场以环保著称的福乐阁涂料遭到中国消费者的质疑，严重影响了南方市场的销售。福乐阁发言人认为，媒体报道讲究真实准确，尤其在批评性报道时更应明确具体对…     

Photoelectrochemical properties of sol–gel-derived Ti1−xVxO2 solid solution film photoelectrodes

Ti_1−xV_xO₂ solid solution film photoelectrodes were prepared by the dip-coating sol–gel method. X-ray diffraction and X-ray photoelectron spectroscopy were employed to ensure the formation of the solid solution and their composition. Obvious photoresponses were observed in the visible region for the solid solution film electrodes with x0.05 and the red shift of the photoresponse was enhanced with increasing x. Moreover, the solid solution film electrodes were found to be photoelectrochemically stable. However, the onset potential of photocurrent shifted positively with increasing x. Band model of the solid solution was suggested to explain the effects of the vanadium incorporation on the photoelectrochemical properties.     

计算机在高炉鼓风机上的应用

本文介绍了捷克和斯洛伐克ＣＫＤ公司的ＭＡＲＫ工业控制计算机构成及其在高炉鼓风机控制系统中的应用，较详细地说明了高炉鼓风机的工艺控制思想。