第27届亚锦赛中国队攻防数据分析

运用文献资料法、录像电视观察法以及数理统计；对第27届亚洲篮球锦标赛中国队同所有对手比赛对抗的攻防数据进行比较分析。结果显示：中国队在进攻技术指标方面除罚球平均命中率比对手低，并且差异显著，其余指标平均值均比对手高，差异不显著，稳定性较差；反映整体配合和团队合作的指标上，中国队助攻和篮板球均值高于对手，失误低于对手，但是对均值标准差检验不显著。虽然中国男篮在平均身高上优势明显，但在亚洲篮球整体水平上已经没有体现出优势，在比赛数据相近的情况下，细节关乎成败。     

6RA27系列直流调速装置在精密龙门刨床上的应用

本文介绍了精密龙门刨床主拖动采用西门子６ＲＡ２７系列直流调速装置,取代直流“机组”的可行性,原理,调试以及应用。     

基于XScale处理器的嵌入式视频解决方案

设计基于Intel(R) XScale系列嵌入式系统处理器平台的视频解决方案.采用PXA27x处理器中的两项技术即Quick Capture接口和优化的IPP库进行开发,并引入该处理器平台的外加放置层(overlayer)多层显示,分别完成了系统的视频采集、图像异地传输和视频数据本地显示功能.实现了较高的性能指标.     

Hep27, a member of the short-chain dehydrogenase/reductase family, is an NADPH-dependent dicarbonyl reductase expressed in vascular endothelial tissue

Human Hep27 was originally isolated from growth-arrested HepG2 cells and identified as a member of the superfamily of short-chain dehydrogenases/reductases (SDR). Its substrate specificity has not been determined, but a cross-species comparison suggests that it occurs in widely divergent species, such as human, Cenorhabditis elegans, Drosophila and Arabidopsis thaliana. In this study, Hep27 was expressed as a His₆ fusion protein, and subjected to a substrate screen, using a compound library of SDR substrates, comprising steroids, retinoids, sugars and carbonyl compounds. Whereas no steroid dehydrogenase or retinoid activity was detected, it was found that Hep27 catalyzed the NADPH-dependent reduction of dicarbonyl compounds, like 3,4-hexanedione and 1-phenyl-1,2-propanedione with similar turnover numbers as DCXR (a mitochondrial dicarbonyl reductase/xylulose reductase). In contrast, Hep27 does not convert sugar substrates like xylulose or threose. Based on its substrate specificity and expression in endothelial tissues, it is suggested that Hep27 functions as a dicarbonyl reductase in enzymatic inactivation of reactive carbonyls, involved in covalent modification of cellular components. Received 16 January 2006; received after revision 28 February 2006; accepted 31 March 2006     

Structural state of adularia from Hishikari, Japan

Adularia sample was collected from epithermal Au-, Ag-bearing quartz-adularia veins from Hishikari, Japan. This adularia is rich in K, Or=94.63, clear, transparent, fine-grained and closely associated with quartz. In this study, it was determined by XRD, IR and²⁹Si,²⁷Al MAS NMR methods. The adularia studied is of high sanidine with triclinic domains in it. The occupancy of Al 2t₁=0.60, IR ordering θ=0.15.²⁹Si NMR spectrum of this adularia shows a broad triplet peak, i.e. 3 poorly separated peaks at −94.9, −96.7, −99.9. This kind²⁹Si NMR spectrum for natural high sanidine has never been reported before. And the²⁷Al NMR spectrum gives an asymmetry peak with chemical shift at 58.7 extending slightly to the low frequency. Under a violent boiling environment, Hishikari adularia rapidly crystallized from a supersaturated solution.     

准噶尔盆地莫索湾地区油源分析

在对准噶尔盆地莫索湾地区地化特征的研究和大量地化参数处理的基础上,利用原油δ13C,Pr/Ph和(Pr+nC17)/(Ph+nC18)以及饱和烃轻重比∑C21-/∑C22+和(C21+C22)/(C28+C29)等参数对原油进行了对比分析,并结合原油运移分析及其他地质特征的研究,最终确定了莫索湾地区的油源:盆参2、芳2井区油源主要为昌吉凹陷二叠系;盆5、盆6井区油源主要为盆1井西凹陷二叠系;两井区交汇地带的盆4井和莫5井一带原油是混源的.     

离心铸造Zn-Al-Mg-Si合金及其自生表面复合材料

采用热模金属型工艺，离心铸造Zn-27Al-9．8Mg-5．2Si和Zn-27Al-6．3Mg-3．7Si合金，获得了内层聚集大量块状初生Mg2Si、少量初生Si，中层不含初生Mg2Si、Si，外层含有初生Mg2Si、Si的自生表面复合材料．考察了成分、模具温度、转速、变质处理对离心铸造Zn-Al-Mg-Si合金组织和结构的影响．结果表明，Zn-27Al-9．8Mg-5．2Si合金自生复合材料内、外层的厚度比Zn-27Al-6．3Mg-3．7Si的厚度厚，初生Mg2Si的数量更多；随着转速增加，Zn-Al-6．3Mg-3．7Si合金自生复合材料的内层厚度增加，外层厚度减少；Na盐变质能够细化晶粒和初生Mg2Si，使初生Mg2Si分布更均匀，使初生Si团球化．最后分析了复合材料的成形过程．     

四溴乙烷变质原因的探讨及其稳定剂的选择

本文根据四溴乙烷分子中化学键的离解能数据估算反应活化能,分析得出:在常温及弱光照射下,四溴乙烷就会逐渐变质。通过色质联用波谱分析,确定了四溴乙烷变质过程中生成的主要产物,证实了本文分析的四溴乙烷变质的主要原因,从而找出选择稳定剂的原则。通过稳定试验和空白试验的色度和pH值对比及色谱分析证明:微量稳定剂就能使四溴乙烷在常温下稳定两年。     

铸造锌铝合金蜗轮的疲劳寿命估算

本文用Ｎｅｕｂｅｒ局部应力应变分析法估算了新材料铸造锌铝合金ＺＡ２７蜗轮的疲劳裂纹形成寿命。     

热处理工艺对ZA27铸造合金组织及性能的影响

研究了热处理工艺对ＺＡ２７ 铸造合金组织及性能的影响，结果发现：１００℃等温时效在促使合金亚稳相转变的同时，可使合金具有良好的综合性能