CO* /CO exchange on Pd(111) at low temperature

Conclusion The behavior of CO*/CO exchange in a low temperature region is different from that in the high temperature region^[5]. From 193 to 203 K, the terminal-molecule exchange with the gas phase molecules is dominant, where a level-off regime appears. From 223 to 253 K, the bridge-molecule exchange with gas phase molecules is dominant. From 253 to 313 K, the mixed adsorbed molecules of the three-fold hollow and the bridge molecules can exchange with gas phase molecules respectively, and the two contradictable effects lead to the appearance of the second level-off regime.     

高级导引头技术发展现状及动向

本文是关于精确制导战术导弹和美国SDI计划中高级红外、毫米波和微波导引头(寻的器)最新发展现状的综述。文中给出了关于SDI计划寻的器技术最新进展的评述,论述了高级红外、毫米波和微波导引头的发展动向。     

鹤类保护与芦苇水生态的关系

目前,北方部分苇塘因干旱和其它原因,其面积在不断缩小或芦苇生长发育受阻、产量下降。搞好苇塘的水利工程,满足不同生长期,芦苇对不同水深的要求,是改善芦苇低产和芦苇沼泽群落退化的有效措施。但改善芦苇生长发育要求的条件,对依存于沼泽环境的鹤类影响如何,笔者通过三年的研究表明:芦苇生长发育对水的要求与保护鹤类并不矛盾。     

桐柏围山城地区变质岩形成的温压条件

文章基于变质岩中的矿物共生组合和前进变质作用中的特征矿物,论述了桐柏围山城变质地体中发育的铁铝榴石+黑云母、蓝晶石+十字石和矽线石变质带与绿帘石角闪岩相及角闪岩相变质作用,并据矿物地质温压计和氧同位素地质温度计,估算了其形成时温压条件是500—650℃,500—700MPa。     

水平连铸灰铁矩形截面型材凝固过程数值模拟

以５０ｍｍ×９０ｍｍ水平连铸灰铁型材为对象利用直接差分法在反算结晶器内表面热流边界的条件下，并基于型材表面热流等于结晶器相应部位热流的基础上［１］，进行了同时计及轴向传热的三维凝固的数值模拟。将模拟结果与实际结晶前缘相比较，证明模拟结果与实际相吻合。     

Effect of Factors on Physiology Acclimatization of Construction Groups Entering Again into Plateau in Early Days

Purpose： To find out the relationship between duration of break, gender, age and the early physical conditions of the people who go to the Plateau again after the break. Means： The pre-work physical inspection data of 2528 people, who participated the construction on the Plateau （altitude 3080 m） during 2002 - 2004, and then returned during 2003 - 2005, were studied. Before the inspections, these people had been on the Plateau for 7 - 15 days to get them adaptable to the altitude conditions. These people were divided randomly into Long Break Group （break time≥90 d, n = 984） and Short Break Group （break time ≤60 d, n = 1544）. Then they were divided into sub-Groups based on gender and age. Statistical analysis was then done using SPSS 12.0 software. Resdts： （1）The means of sBP, dBP, HR, and Hb of the Long Break Group, after 7 - 15 days of adaptability period, were lower than that of Short Break Group; while SpO2 of Long Break Group was slightly higher than that of Short Break Group. （Mean p ≤0.001 ; The abnormal rates of ALT, BUN, BP of the Long Break Group were also significantly lower than that of Short Break Group （p 〈 0.05, or p 〈 0.001; （2）In the same group, or different groups, the BP, Hb of female sub-Group was better than male sub- Group（p 〈 0.05, or p 〈 0.001. The BP, ECG of 〈 40 y sub-Group is better than ≥40 y sub-Group（p 〈 0.05 or, p 〈 0.001. Conclusion： 3-month, or even longer break in winter has positive impacts on the early physical conditions of the constructors on the Plateau （esp. males over 40 years old）.     

5～20MeV高能质子辐照对空间实用GaAs/Ge太阳电池性能的影响

用能量为5～20MeV,注量为1×109～7×1013cm-2的高能质子对空间实用GaAs/Ge太阳电池进行辐照,得到了其性能随质子能量和注量的变化关系,并对变化关系进行了能损模拟分析.结果表明:注量低于1×109cm-2的质子辐照不会引起太阳电池性能的变化;当注量增加为3×1012cm-2时,5,10,20MeV质子辐照引起的太阳电池性能参数Isc的衰降变化分别是原值的80%,86%,90%;Voc的衰降变化分别为原值的82%,85%,88%; Pmax的衰降变化分别为原值的60%,64%,67%.当辐照注量为5×1013cm-2时,5,10,20MeV质子辐照引起的Pmax衰降变化分别为原值的26%,30%,36%.即随着注量的增加,太阳电池性能衰降增大;且相同注量的辐照,质子能量愈高,太阳电池性能衰降愈小.     

Rationality of 17 cities'''' public perception of SARS and predictive model of psychological behavior

Generally speaking, humans are assumed to be rational when perceiving risky event, judging and adopting behavior, however, Herbert. Simon, the Nobel Laureate in economic science of 1987, claimed that humans havebounded rationality due to fundamental limitations in human mental processes, so they do not think rationally in real activities[1]; and the psychologist Kahnemen won the international recognition again in 2002 for having integrated insights from psychological research into economic sc…     

复合过滤剂去除低度白酒乳白色混浊的研究

在分析了低度白酒生产中出现乳白色混浊的原因之后，研究出以分子筛和活性炭为吸附剂，几种矿物质为助滤剂的复合过滤剂。用于低度白酒生产，该工艺具有设备简单、易于操作、生产平稳、能耗低等特点。每升酒中杂醇油、固形物质量百分含量降低５０％左右。     

9-硅蒽和9-锗蒽与烯烃杂Diels-Alder反应的理论研究

采用密度泛函理论方法在B3LYP/6-311G**水平研究了9-硅蒽和9-锗蒽与烯烃的杂Diels-Alder反应的微观机理、势能剖面,考察取代基对反应势能剖面的影响.计算结果表明,所研究反应均以协同非同步的方式进行,且Si(Ge)—C键总是先于C—C键形成.乙烯分子中C原子上的苯基取代基在热力学上对反应不利,但在动力学上的影响取决于产物中苯基与Si(Ge)原子之间的相对位置.9-硅(锗)蒽分子中Si(Ge)原子上的2,4,6-三甲基苯基取代基在热力学和动力学上均对反应不利.