憎水型膨胀珍珠岩在乳化炸药中应用研究

论述了憎水型膨胀珍珠岩的来源、性质及其在乳化炸药中的作用 ,主要探讨了采用该材料生产乳化炸药的适宜工艺条件 ,即敏化温度控制在 60±5℃ ,加入 3 .0 %憎水型膨胀珍珠岩敏化 3～ 4分钟 ,生产的乳化炸药具有很好的爆炸性能和贮存稳定性     

功能电陶瓷材料CaSrTiMnO6的晶体结构和介电性能

利用传统固相烧结法制备功能介电陶瓷材料CaSrTiMnO₆ (CSTM). 里瓦尔德精修结果表明,该陶瓷具有单钙钛矿结构,属于pnma空间群. 在CSTM陶瓷的介电谱图中,只出现了一个介电弛豫峰,本文利用混价结构机理和归一化键长理论很好地解释了这种现象. 在333～453 K的温度区间内,介电常数在低频下稳定地保持在4 000左右. 这种性质说明该陶瓷材料在高温低频下具有很大的实际应用潜力.     

国内外知名篮球鞋力学性能的实验研究

目的:了解国内外二款知名篮球鞋"耐克"全掌气垫篮球鞋和"安踏"非气垫篮球鞋的力学性能,评价力学功效。方法:以实验法测试二款知名篮球鞋的力学性能。结果:二款知名篮球鞋的压力测试表明,几乎所有的被试者"鞋-地"界面平均压力与峰值压力"安踏"鞋比"耐克"鞋稍高,但二款篮球鞋"鞋-地"界面的平均压力与峰值压力值都不存在显著性差异(P0.05);纵跳实验表明,"安踏"鞋纵跳高度稍高于"耐克"鞋,二者之间并无统计学上的差异;摩擦系数实验表明,"耐克"鞋的动静摩擦系数优于"安踏"鞋的动静摩擦系数,二者的的动静摩擦系数之间存在统计学上的差异(P0.05)。     

论全面社会主义建设时期党的知识分子政策

195 5年至 1966年 ,是我国全面建设社会主义的十年 ,在这期间党对知识分子政策的变化尤引人注目。它经历了正确、失误 ,调整、再失误这样一个复杂、曲折的过程。对知识分子阶级属性判断的严重失误 ,是促使其政策多次反复的主要原因 ;同时又与中国政治的某种变化息息相关 ,研究这段历史 ,具有重要的现实意义。     

当代排球比赛中的几个特性

正确、牢牢地把握住当代排球比赛中的特性,能使教练员、运动员乃至决策部门从宏观上认清排球运动的发展趋势,从而制定出行之有效的对策。本文认为,当代排球比赛中的特性主要表现在以下几方面:快这;高度;变化;创新;全面。     

液压式和电子式万能试验机测量性能的比较

本文通过对钢材所做的拉伸试验，分析了液压式试验机和电子式试验机对钢材力学性能的不同影响，并探讨了产生该不同影响的原因。     

预冷变形对Al-Li-Cu-Mg-Zr合金性能的影响

研究了预冷变形对Al-Li-Cu-Mg-Zr合金显微组织和力学性能的影响．结果表明，适当的预冷变形量对改善合金塑韧性有较明显的作用．S’相沿预冷变形所产生的位错亚结构的分散沉淀、平衡相析出量的减少和δ’相无沉淀析出带窄化从而使应力集中与变形不均匀程度降低，是合金强塑性改善的主要原因．     

Halogen bonding in the co-crystallization of potentially ditopic diiodotetrafluorobenzene: a powerful tool for constructing multicomponent supramolecular assemblies

Halogen bonding is emerging as a significant driving force for supramolecular self-assembly and has aroused great interest during the last two decades. Among the various halogen-bonding donors, we take notice of the ability of 1,4-diiodotetrafluorobenzene (1,4-DITFB) to co-crystallize with diverse halogen-bonding acceptors in the range from neutral Lewis bases (nitrogen-containing compounds, N-oxides, chalcogenides, aromatic hydrocarbons and organometallic complexes) to anions (halide ions, thio/selenocyanate ions and tetrahedral oxyanions), leading to a great variety of supramolecular architectures such as discrete assemblies, 1D infinite chains and 2D/3D networks. Some of them act as promising functional materials (e.g. fluorescence, phosphorescence, optical waveguide, laser, non-linear optics, dielectric and magnetism) and soft materials (e.g. liquid crystal and supramolecular gel). Here we focus on the supramolecular structures of multicomponent complexes and their related physicochemical properties, highlight representative examples and show clearly the main directions that remain to be developed and improved in this area. From the point of view of crystal engineering and supramolecular chemistry, the complexes summarized here should give helpful information for further design and investigation of the elusive category of halogen-bonding supramolecular functional materials.     

Dynamic response of RPC-filled steel tubular columns with high load carrying capacity under axial impact loading

Experimental investigation into impact-resistant behavior of reactive powder concrete (RPC)-filled steel tubular columns was conducted,and dynamic response of the columns under axial impact loading was studied by means of numerical simulation method.Increase coefficient of load carrying capacity and ratio of load carrying capacity between steel tube and RPC core of col-umns were obtained.     

Test and Analysis of an Existing Tunnel Vibration Induced by Blasting Construction of Diaphragm Wall

According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel, the monitoring project of the vibration of the existing tun-nel induced by the blasting construction is put forward, which includes the sensors’ location, moni-tor method and the vibration monitoring system. Based on the monitoring data of the explosion vibration, the vibration wave forms, velocities, acceleration responses, main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quanti-ties. According to the safety-judging standard of explosion vibration, the conclusion that the exist- ing tunnel is safe under the explosion vibration is then drawn. Furthermore, the spectrum character-istics of three explosion vibrations and the spectrum changing properties of explosion vi-bration wave transmitting in different directions are concluded, which can provide reference to similar projects.