大尺寸系列孔隙度高强人造岩芯的研制

采用矾土、氧化铝与硬质碎瓷粒为骨料, 选用硅溶胶、高岭土、煅烧滑石和方解石组成的MgO-CaO-Al2O3-SiO2低共熔混合物作为晶界结合剂,以木屑和煤粉为造孔剂,利用浇注成型技术制备出大尺寸系列孔隙度高强人造岩芯.其主要技术指标为:尺寸:65mm×150mm,孔隙度:26.6～45.4%,抗压强度:37.5～51.1 MPa.同时,SEM测试发现岩芯中的气孔呈三维连通状分布,且直径在100μm以下的微孔居多.     

Optical Emission Spectroscopy Investigation of a Surface Dielectric Barrier Discharge Plasma Aerodynamic Actuator

The optical emission spectroscopy of a surface dielectric barrier discharge plasma aerodynamic actuator is investigated with different electrode configurations, applied voltages and driving frequencies. The rotational temperature of N2 （C^3 Ⅱu） molecule is calculated according to its rotational emission band near 380.5 nm. The average electron energy of the discharge is evaluated by emission intensity ratio of first negative system to second positive system of N2. The rotational temperature is sensitive to the inner space of an electrode pair. The average electron energy shows insensitivity to the applied voltage, the driving frequency and the electrode configuration.     

Floyd—Dijkstra算法在电缆敷设设计中的应用

通过将Ｆ－Ｄ算法应用于电缆敷设设计中,提供一种实现电缆敷设的优化设计的方法,并用实列进行验证。     

介孔分子筛负载型乙苯脱氢催化剂研究

考察了α－Ｆｅ２Ｏ３在ＭＣＭ－４１,ＨＭＳ和ＫＩＴ－１三类介孔分子筛上的分散情况,以及介孔分子筛负载氧化铁催化剂的乙苯脱氢性能。实验结果表明,α－Ｆｅ２Ｏ３能有效地分散在介孔分子筛的表面上,其分散阈值远高于其他载体,由此大大提高了乙苯脱氢反应的活性。钾的引入对该类负载催化剂会产生不利影响。     

氮气水合物储氢的激光拉曼光谱研究

近年来,笼型水合物储氢已成为储氢研究的热点之一。采用激光拉曼光谱开展了以氮气水合物为载体的储氢实验研究。在较为温和的条件下(15 MPa, -18 ℃),使合成的氮气水合物与氢气发生反应,对反应产物的拉曼光谱分析结果显示,氢气分子进入到水合物的笼型结构中,并且呈现出多分子的笼占有状态;氮气水合物与氢气的反应时间是影响储氢效果的重要因素。研究结果表明,氮气水合物有希望成为一种有效的储氢介质。     

高中语文创新教学探究

高中语文教师就要认真搞好课堂教学设计，营造和谐民主的课堂氛围.充分发挥探究式教学方法，大胆地创新教育教学方法，促进学生各方面得到生动活泼主动地发展，从而形成丰富而独特的综合素质. 语文教师在课前，一定要深思熟虑，以便在互动教学活动中做到游刃有余.这就要求教师精心设计好每一堂课的问题，恰到好处地设计问题.互动情境的设计有媒体导入法、实物观察法、问题讨论法等，但老师怎样去创设互动情境，就要结合教学的具体内容和学校的实际情况而定.进行分组讨论，各抒己见，充分发挥他们的主观能动性，使教师成为学生学习的伙伴，认真倾听学生的发言，如发现学生理解上的偏差，就给予适当的补充与延伸.这样，就能激发学生思维的积极性，学生也就会在不断地合作探索中，迸发出激情.     

Average life of oxygen vacancies of quartz in sediments

Average life of oxygen vacancies of quartz in sediments is estimated by using the ESR(electron spin resonance) signals of E' centers from the thermal activation technique. The experi-mental results show that the second-order kinetics equation is more applicable to the life estima-tion compared with the first order equation. The average life of oxygen vacancies of quartz from4895 to 4908 deep sediments in the Tarim Basin is about 10~(18) a at 27℃.     

P350萃取色谱法分离微量钼（Ⅵ）的研究

低含量钼常用硫氰酸盐光度法测定,目前以水杨基萤光酮-溴化十六烷基三甲基胺光度法测定灵敏度最高,但一些高价金属离子有干扰,尤其钨(Ⅵ)和钛(Ⅳ)的干扰难以直接消除。因此,本实验系统地研究了甲基磷酸     

原位化学沉积法制备碳/聚苯胺复合材料作为超级电容器材料的研究

Polyaniline （PA） film was chemically deposited onto the surface of activated carbon （AC） uniformly. Chemical deposition was carried out in 0.1 mol/L aniline plus 0.5 mol/L H2SO4 solution adopting V2O5·nH2O coated on the surface of activated carbon as oxidant. The surface morphologies and structures of the composite materials were characterized by scanning electron microscopy and FT-IR spectra. The electrochemical properties of the composite material electrodes were studied by cyclic voltammetry and constant current charge/discharge tests in 1 molFL H2SO4 solutions. The specific capacitance of composite materials was exhibited as high as 237.5 F/g at a current density of 1.0 A/g compared with a value of 120 F/g for pure carbon electrode. Good power characteristic and good stability of composite electrodes were also demonstrated.