第16届国际理论和应用力学大会

<正> 1.一般情况 国际理论和应用力学联合会(IUTAM)召开的第16届国际理论和应用力学大会(ICTAM),于1984年8月20—25日在丹麦的哥本哈根举行。会议参加者共700余人。会议除开幕大会报告(Alfven:空间研究和宇宙中流体介质力学的新方法)和闭幕大会报告(Keller:力学研究的进展和问题)外,还按分组报告、分组开场报告,一般报告和墙报等多种方式进行,大会重点主题是一个:“海洋与结构的波相互作用”, “多组分介质的微

Chromosome painting between human and lorisiform prosimians: Evidence for the HSA 7/16 Synteny in the primate ancestral karyotype

Multidirectional chromosome painting with probes derived from flow-sorted chromosomes of humans (Homo sapiens, HSA, 2n = 46) and galagos (Galago moholi, GMO, 2n = 38) allowed us to map evolutionarily conserved chromosomal segments among humans, galagos, a

B2 肾上腺素受体多肽16 位基因型与夜间哮喘表现型的关系

目的　探讨B2 肾上腺素受体(B2AR) 16、27 位基因多态性与夜间哮喘表现型的关系。方法　以最大呼 气流速(PEFR ) 为标准, 将49 例哮喘患者分为夜间哮喘组(25 例) 和非夜间哮喘组(24 例)。用PCR 产物直接测序确 定B2AR 16、27 位基因型分布, 以及分析两个位点各种基因型与两组病例PEFR、第一秒用力呼气量(FEV 1) 以及用药 情况之间的关系。结果　以PEFR 为标准, 夜间哮喘组PEFR 在夜间平均下降33. 6% , 非夜间哮喘组下降7. 0% , 二 者差异显著(P < 0. 001)。夜间哮喘组和非夜间哮喘组(白天) 基础FEV 1 分别为73. 7 % 和85. 8 % , 也具有显著性差 异(P < 0. 001)。Gly16 的等位基因频率在夜间哮喘组56. 0% 明显较非夜间哮喘组22. 9% 高(P < 0. 05) , Gly16 集中 分布于夜间哮喘组。27 位点的多态性在两组间无显著性差异。结论　B2AR Gly16 基因型与夜间哮喘可能有关系。

mtDNA Data Indicate a Single Origin for Dogs South of Yangtze River, Less Than 16,300 Years Ago, from Numerous Wolves

There is no generally accepted picture of where, when, and how the domestic dog originated. Previous studies of mitochondrial DNA (mtDNA) have failed to establish the time and precise place of origin because of lack of phylogenetic resolution in the so fa

Interaction between human interleukin-16 and CD4 receptor of HIV-1

AIM: To study the interaction between human interleukin-16 (IL-16) and the receptor CD4 (T-lymphocyte differentiation antigen) of human immunodeficiency virus type 1 (HIV-1). METHODS: Two structurally con served regions (SCRs) of human IL-16 were built by the SYBYL/Biopolymer module using the corresponding transmembrane (TM) domain of human interleukin-1 (HIL-4) and HIL-2 as the templates. The coordinates for amino-terminal residue sequence, carboxyl-terminal residue sequences, and cytoplasm loops were generated using Biopolymer's LOOP SEARCH algorithm. RESULTS: HIL-16 first formed a homodimer, then contacted with CD4 dimer further forming a dimeric complex. Subsequently, the dimeric complex constructed the tetrameric complex by two disulfide bridges between the cysteines of HIL-16 (Cys31-Cys31). CONCLUSION: The interaction model is useful to propose the action mechanism of HIL-16 and is beneficial for rational designing of novel anti-HIV drugs.

蛙虹彩病毒cop基因的克隆表达及亚细胞定位

从蛙虹彩病毒(Rana gryliovirus,RGV)基因组中克隆了含凋亡相关结构域的新基因-cop(Caspaserecruit ment domain only protein,COP)基因的全部编码区,成功构建了重组表达载体,进行了原核表达,并在鲤鱼上皮瘤细胞(Epithelioma papulosumcyprini,EPC)中进行了亚细胞定位.序列分析表明,RGVcop基因全长288 bp,编码一个长为95 aa,分子量为10.4×103的推定蛋白.二级结构预测表明其含有5个α螺旋.同源性比对分

Cloning and analysis of 16 Rab genes from macronuclear DNA of Euplotes octocarinatus

Rab proteins belong to the largest family of the Ras superfamily of small GTPase that play an important role in intracellular vesicular traffic. So far, almost 60 members of Rab family have been identified in mammalian cells. To further study the diversity and function of Rab protein in evolution, unicellular protozoa ciliates, Euplotes octocarinatus, were used in this study, Rab genes were screened by PCR method from macronuclear DNA of E. octocarinatus. Sixteen Rab genes were obtained. They share 87.6 - 99.5% identities. Highly conserved GTP-binding domains were found. There are some hot regions that diverse sharply in these genes as well.

分多阶实现16信道的可重构光插分复用器结构

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Measurement of a reciprocal four-port transmission line structure using the 16-term error model

A new method to measure reciprocal four-port structures, using a 16-term error model, is presented. The measurement is based on 5 two-port calibration standards connected to two of the ports, while the network analyzer is connected to the two remaining ports. Least-squares-fit data reduction techniques are used to lower error sensitivity. The effect of connectors is deembedded using closed-form equations. (C) 2007 Wiley Periodicals, Inc.

A 16-term error model based on linear equations of voltage and current variables

Formulation of a 16-term error model, based on the four-port ABCD-matrix and voltage and current variables, is outlined. Matrices A, B, C, and D are each 2 x 2 submatrices of the complete 4 x 4 error matrix. The corresponding equations are linear in terms of the error parameters, which simplifies the calibration process. The parallelism with the network analyzer calibration procedures and the requirement of five two-port calibration measurements are stressed. Principles for robust choice of equations are presented. While the formulation is suitable for any network analyzer measurement, it is expected to be a useful alternative for the nonlinear y-parameter approach used in intrinsic semiconductor electrical and noise parameter measurements and parasitics' deembedding.

基于CoP建模的协作过滤推荐方法

传统的协作过滤推荐方法主要基于个人兴趣特征来实现推荐。在组织内部协作场景下,为实现知识共享与重用,推荐系统不仅要考虑用户兴趣,还应考虑用户和用户组的任务。传统的协作过滤推荐方法已不能满足要求。CoP是组织内部人员管理的主要形式,它的特征是其成员任务的反映。基于已有的协作过滤推荐研究与D-S理论,提出了一种CoP特征构建算法,并以此为基础研究了面向CoP的协作过滤推荐。

单侧耦合16通道100GHz硅基二氧化硅阵列波导光栅的研制

介绍了一种新型单侧耦合16通道、100GHz通道间隔的硅基二氧化硅阵列波导光栅(AWG).通过增加一个Y分支波导结构,将AWG的输入、输出波导等间距整齐排列,仅用一个光纤阵列(FA)就可以对AWG器件进行耦合封装.这种AWG的结构设计可有效地减小器件尺寸和增加波导结构的弯曲半径,可减少器件的抛光和耦合时间,可降低器件的成本.

16信道0．35μmCMOS／VCSEL光发射模块

研究了垂直腔面发射激光器（VCSEL）及其列阵器件的光谱特性、调制特性、高频特性及与微电子电路的兼容性，将1×16的VCSEL与CMOS专用集成电路进行多芯片组装（MCM），混合集成为16信道VCSEL光发射功能模块。测试过程中，功能模块的光电特性及其均匀性良好，测量的-3dB频带芝宽度大于2GHz。

温度引起的ZnSe/Zn_（0.84）Mn_（0.16）Se超晶格中势阱层和势垒层的反转

测量了ZnSe，Zn_(0.84)Mn_(0.16)Se合金和ZnSe/Zn_(0.84)Mn_(0.16)Se超晶格的10～300K的变温光致发光谱。发现ZnSe的带隙在10K时比Zn_(0.84)Mn_(0.16)Se合金的带隙小，而在300K时比合金的带隙大。预计ZnSe/Zn_(0.84)Mn_(0.16)Se超晶格中在130K附近会发生势阱层和势垒层的反转。在ZnSe/Zn_(0.84)Mn_(0.16)Se超晶格中观测到了这种反转但发生在80K附近。超晶格中Zn_(0.84)Mn_(0.16)Se层的应变可能是反转温度变低的原因。