用GC/MS联用技术分析香紫苏挥发油成分

水蒸汽蒸馏香紫苏花序及叶得精油0.7-1.5%。经GC/MS分析,鉴定出46种香气成分,约占出峰面积的97%,其中含量较高的为芳樟醇、α-松油醇、乙酸芳樟酯、乙酸橙花酯、乙酸香叶酯、石竹烯及β-荜澄茄油烯。     

分子筛结构和无定形结构中Ti-O-SiO_3键的IR特性

在对用ＸＲＤ表征确证分属于ＴＳ－２分子筛和无定形ＴＳ氧化物（简称ＡＴＳ）结构的一系列样品进行红外表征时，首次发现在分子筛骨架与无定形表面都存在Ｔｉ－Ｏ－ＳｉＯ３健，但这两者在红外上是可区分的，前者作为骨架钛振动带出现在９６２．５～９６６．７ｃｍ－１处，而后者作为非骨架钛振动带则出现在９４５～９５６ｃｍ－１处，即后者明显发生了红移．分子筛骨架振动带（１２２６，５５６ｃｍ－１）强弱对其Ｔｉ－Ｏ－ＳｉＯ３带的位置影响不大，比较而言骨架带弱的约有２．０ｃｍ－１的红移．苯酚羟基化结果表明在分子筛骨架上的Ｔｉ－Ｏ－ＳｉＯ３活性位上苯酚羟基化生成邻苯二酚和对苯二酚；而处于无定形表面的非骨架Ｔｉ－Ｏ－ＳｉＯ３活性位上只生成邻苯二酚     

块三对角矩阵方程的追赶法及其应用

导出了块三对角矩阵方程追赶法的一套递推关系式，并编制出相应的计算机Ｃｏｄｅ。该Ｃｏｄｅ具有良好的实用价值，可供在实际问题中使用。     

FAP——流动分析通用有限元程序

采用高分辨率有限元格式，建立了流动与输运过程的数值模拟系统。该系统包含范围相当广泛的流动、传热与输运问题，如不可压粘流与可压缩流，自由表面流与浅水环流，传热与相奕问题，渗流以及多相流等。由于采用非结构化网络制备了多种二维与三维单元，系统具有网络生成容易、通用性强等特点。     

C／Cu复合材料的热膨胀性能及合金元素的影响

研究了３００Ｋ－１０７３Ｋ温度范围内两种纤维比Ｃ／Ｃｕ复合材料的热膨胀性能及合金元素的影响。结果表明，在α－Ｔ曲线的水平和下降阶段，合金元素对Ｃ／Ｃｕ复合材料热膨胀性能的影响主要取决于合金元素对其界面结合强度的影响程度。     

A method of quantitatively calculating amount of allochthonous organic carbon in lake sediments

Conclusion The lake sediments have registered the information of palaeoclimate and palaeoenvironment in the lake itself and the regional scale. This also leads to a complexity in study of the palaeolimnology by all kinds of proxies. How to purify these proxies to indicate the palaeoclimate has become a problem to be solved. Most of the proxies can qualitively identify the percentage of allochthonous and autochthonous organic components, e.g. δ¹³c_org CD/TC. The model introduced in this note has provided a method of quantitatively calculating the amount of allochthonous organic carbon. As for determination of regulating parameters, i.e. A1 and As, further work is still in need.     

Collaborative applications based on the internet

The basic concepts of collaborative applications and some relevant aspects about network communications are introduced. With the examples of some collaborative applications developed by us, several technical problems about collaborative applications, such as loss of data packets, unknown IP address and timedelay, are discussed in detail. And the methods of solving these problems are also provided. Supported by International Cooperation Project (Japan, Jincheng Co. Ltd) Fang Rui: born in 1975, Graduate student