准速度匹配电光相位调制器

报道了一种具有周期性极性反转结构的ＬｉＴａＯ３电光相位调制器，在１６．２５ＧＨｚ调制频率下，实现了微波与光波的准速度匹配。在合成超短光脉冲实验中获得了１６．２５ＧＨｚ下５７ｒａｄ的调制度，调制带宽达１．８５ＴＨｚ（ＦＷＨＭ）     

具有优先权的令牌环形网通信协议的性能分析

本文提出两种新的具有优先权的、令牌环形网通信协议,分别叫做R-PTR和WR-PTR方式,并从理论上分析了这两种方式的信道利用率—传输时延特性,给出了仿真实验结果。通信协议是基于IEEE 802.5方案中提出的标准通信协议(以下,简称IEEE-PTR方式)。IEEE-PTR方式中采用了堆栈,本文提出的方式中没有采用堆栈,所以,该方式比IEEE-PTR方式简单。理论分析和仿真实验结果表明,该方式,在各种传输方式的情况下,其性能都优于IEEE-PTR方式。     

氯化-水解法制取二氧化钌

本文论述了氯化-水解法制取二氧化钌中,氯化效率与温度、时间以及助溶剂量直至批量到40g,它们之间的相互影响。 氯化钌:助溶剂:=1:3,500℃4小时氯化,氯化效率为97.5％,经水解得到的二氧化钌,纯度为99.95％(指金属钌),衍射分析表明,二氧化钌为单一物相,平均粒度小于1μm,能满足厚膜电阻浆料对该材料的要求。     

红外热图在针灸引起半身发汗抑制研究中的应用

红外热图在针灸引起半身发汗抑制研究中的应用杨果杰，松本孝郎，小坂光男（首都医科大学科研处）（日本长崎大学）ＴｈｅＡｐｐｌｉｃａｔｉｏｎｏｆＩＲＴｈｅｒｍｏｇｒａｐｈｏｎＲｅｓｅａｒｃｈｉｎＳｕｐｐｒｅｓｓＰｒｅｓｓｕｒｅ－ＳｗｅａｔｉｎｇＣａｕｓｅｄ...     

两个含双(3,5－二甲吡唑基)甲烷配体的铅(II)配合物的合成与结构表征

Reactions of lead（Ⅱ） nitrate or perchlorate with bis（3,5-dimethylpyrazolyl）methane （dmpzm）, produced two new Pb（Ⅱ） chelated complexes [Pb（dmpzm）2X2] （X=NO3^- 1, ClO4^- 2）. Both compounds were structurally characterized by elemental analysis, IR spectroscopy, thermal analysis, and single crystal X-ray diffraction. Both compounds are mononuclear with a distorted square antiprismatic PbN4O4 coordination geometry incorporating a pair of O,O＇-bidentate anions and N,N＇-bidentate dmpzm ligands. In the crystals of 1 or 2, the methyl or methylene groups of dmpzm ligand interact with the oxygen atoms of nitrates or perchlorates to afford intra- and intermolecular hydrogen bonding, thereby forming a two-dimensional network 1 or a three-dimensional structure 2.     

基于光纤光栅的射频同轴开关簧片温度测试研究

对基于光纤光栅测温原理的射频同轴开关内部簧片温度检测进行了研究。使用聚酰亚胺涂覆的光纤光栅,经温度校准后,外界温度与光纤光栅中心波长拟合直线的线性度为99.914%。温度每上升1℃,中心波长漂移10.39pm。将校准的光纤光栅置于射频开关簧片处进行测温试验,算得射频开关内部温度升温到300℃,理论上中心波长的偏移误差为0.02 nm,相应温度重复测试误差为2℃。结果表明,该研究可为射频同轴开关内部簧片温度检测提供有效方法。     

“放管服”背景下高校科研创新服务平台设计研究

在国家实行"放管服"政策背景下,为调动科研人员的积极性,提升科研管理和运营机制的活力,传统的科研管理系统已不适合高校使用需求。通过对国家在科学研究领域"放管服"政策的研究,结合笔者所在高校科研管理职能部门使用需求,采用基于MVC模式的BroPHP框架技术设计高校科研创新服务平台,实现了高校科研管理工作"规范化、创新性、服务型"管理,相比传统科研管理系统,用户粘性提高一倍,科研管理工作量减少50%,对高校增强服务意识,提高管理水平,激发科技创新活力具有重要意义。     

一种新颖1D链状聚合物[Ni(acac)2(dadpm)]∞的合成与晶体结构

The title compound [Ni(acac)₂(dadpm)]_∞ (acac=acetylacetonate, dadpm=4,4′-diaminodiphenylmethane) was synthesized from Ni(acac)₂·2H₂O with dadpm in DMF. The structure was characterized by elemental analysis, IR spectroscopy, thermal analysis and single-crystal X-ray diffraction. X-ray analysis revealed that the central Ni atom is at a center of symmetry, and is octahedrally coordinated by four O atoms from two acac anions and two N atoms from two dadpm ligands. Each dadpm ligand, which has a two-fold axis passing through its methylene C atom, bridges two Ni atoms to form a 1D polymeric chain. Neighboring chains connect via H bonding interactions to generate a 2D network. It crystallizes in the monoclinic system, space group P2/c with a=0.556 79(7), b=0.896 06(12), c=2.187 3(3) nm, β=94.942(3)°, V=1.087 2(3) nm³, Z=2, D_c=1.390 g·cm^-3, F(000)=480, M_r=455.17, μ(Mo Kα)=0.924 mm^-1, R(F)=0.036 0, wR(F²)=0.101 0, S=1.013. CCDC: 254565.     

半开口立方烷型簇合物[WOS3Cu3I(4-bpy)3]·0.25EtOH的合成及晶体结构(4-bpy=4-叔丁基吡啶)

Reaction of (NH₄)₂[WOS₃] with CuI and 4-tert-butylpyridine (4-bpy) in EtOH afforded a tetranuclear neutral cluster [WOS₃Cu₃I(4-bpy)₃]·0.25EtOH. This compound was characterized by elementary analysis, IR, ¹H NMR, TGA, and its crystal structure was determined by X-ray single crystal diffraction. It belongs to monoclinic, space group P2/c with a=2.220 9(2) nm, b=1.364 66(11) nm, c=2.490 6(2) nm, β=104.953(2)°, V=7.292 9(12) nm³, Z=4. The title compound may be viewed as having a half-open cubane-like structure in which three [Cu(4-bpy)]⁺ units are linked by a triply-bridging [WOS₃]^2- unit and a doubly-bridging iodine atom. CCDC: 266412.     

主族金属有机超分子化学进展

以有机主族金属化合物为基本单元进行的超分子自组装是近年来超分子化学的研究方向之一。本文主要对6种主族p区重金属(铟、铊、锡、铅、锑及铋)的典型有机金属超分子的自组装进行探讨和总结。