一种新型吸附床的传热实验研究

介绍了一种新型结构吸附床的传热实验研究.结果表明,该结构的吸附床具有较高的传热效率.     

太阳能冷管吸附制冷的实验研究

介绍了太阳能冷管的运行机理并建立了太阳能冷管测试实验台，通过实验测量它在运行周期内吸附床内侧管温度、套管温度、蒸发器壁面温度、制冷剂脱附量和吸附量等参数随时间变化关系。实验表明，在环境温度为28～36℃、冷管周围风速为0．5m／s的条件下，太阳能冷管制冷持续时间为13h，冷管蒸发器温度最低可达18℃。     

活性碳-甲醇吸附工质对吸附特性的实验研究

对以活性碳为吸附剂、甲醇为制冷剂所组成的物理吸附式制冷工质对的吸附性能进行了实验研究,得到了活性炭-甲醇吸附工质对的基础吸附平衡数据,给出了等温吸附曲线和等吸附量曲线,实验结果为后续的吸附制冷性能研究奠定了基础.     

锆合金包壳的碘致应力腐蚀研究

碘致应力腐蚀开裂被普遍认为是引起锆合金包壳与芯块之间相互作用失效的原因。本文拟就影响碘致应力腐蚀开裂的主要因素和开裂机理作一简要综述。     

吸附量热计的研制

本文报道一种适于mcal级微小热效应检测的吸附量热计。介绍了量热系统结构、量热单元以及恒温槽的计算机控制软件。量热计电能标定的结果为H=1.156±0.003mJ/mm·ml。     

CaCl2-NH3吸附制冷性能强化的实验研究

对CaCl2-NH3吸附式制冷工质对的吸附性能进行了实验研究,得到了吸附等温线、回归出吸附等温方程.针对CaCl2吸附剂颗粒强度不高、长期使用后易出现膨胀粉化、传热传质性能下降等问题,尝试采用掺加胶凝剂的方法对其性能进行强化.通过实验筛选,在CaCl2中掺加20%无机胶凝剂CLS,可使吸附剂的制冷性能有较大提高.     

碘的质谱测量方法研究进展

近年来,电感耦合等离子体质谱（ICP-MS）技术的发展着力于应对基质更加复杂的样品和解决测量过程中的干扰问题,同时与进样、分离系统的联用技术也在快速发展,而加速器质谱（AMS）则朝着更加小型化和更高灵敏度的方向发展。ICP-MS测量前需要对样品进行前处理以消解和提取碘,而AMS测量前则还需对样品进一步分离富集和纯化。本文总结了ICP-MS和AMS的发展概况及其在碘测量方面的应用,归纳了ICP-MS和AMS测量含碘样品的前处理方法,综述了国内外总碘、碘同位素及碘形态的质谱测量方法新进展。     

影响分子筛吸附效率的因素

论述了在空分系统中影响分子筛吸附效率的因素     

Experimental study on impact absorbing performance of motorcycle helmets

The regulation regarding motorcycle helmets to protect the head from impacts has been amended recently. In Europe, the Head Injury Criteria (HIC), which is more relevant to indicate the probability of death than the limitation of maximum acceleration, has been adopted. An experimental study has been conducted following the procedure of the new European regulation, by changing various helmet structural parameters such as the lamination and the bulk density of the shell, and the liner, to investigate the ability of the helmet to protect the head from injuries. The maximum acceleration and HIC were measured. Experimental data have been analyzed with respect to varying lamination of shells and weight of liners. The HIC was found to be improved by reducing the bulk density of the liner and the number of laminations of a shell, and by increasing the loading area of the headform.     

Texture of cellulose microfibrils of root hair cell walls of Arabidopsis thaliana, Medicago truncatula, and Vicia sativa

Cellulose is the most abundant biopolymer on earth, and has qualities that make it suitable for biofuel. There are new tools for the visualisation of the cellulose synthase complexes in living cells, but those do not show their product, the cellulose microfibrils (CMFs). In this study we report the characteristics of cell wall textures, i.e. the architectures of the CMFs in the wall, of root hairs of Arabidopsis thaliana, Medicago truncatula and Vicia sativa and compare the different techniques we used to study them. Root hairs of these species have a random primary cell wall deposited at the root hair tip, which covers the outside of the growing and fully grown hair. The secondary wall starts between 10 (Arabidopsis) and 40 (Vicia) μm from the hair tip and the CMFs make a small angle, Z as well as S direction, with the long axis of the root hair. CMFs are 3-4 nm wide in thin sections, indicating that single cellulose synthase complexes make them. Thin sections after extraction of cell wall matrix, leaving only the CMFs, reveal the type of wall texture and the orientation and width of CMFs, but CMF density within a lamella cannot be quantified, and CMF length is always underestimated by this technique. Field emission scanning electron microscopy and surface preparations for transmission electron microscopy reveal the type of wall texture and the orientation of individual CMFs. Only when the orientation of CMFs in subsequent deposited lamellae is different, their density per lamella can be determined. It is impossible to measure CMF length with any of the EM techniques.     

溶胶-凝胶法在吸收剂表面制备SiO2涂层

用溶胶-凝胶法在多晶铁纤维和炭黑吸收剂的表面分别制备了SiO2涂层，考察了SiO2涂层对吸收剂电磁参数和吸波性能的影响。试验结果表明，多晶铁纤维涂覆SiO2涂层后，表面电导率大大下降，改善了匹配性能，吸波性能得到明显的提高。炭黑表面涂覆SiO2涂层后，介电常数显著下降，高频吸波性能得到明显改善。     

介质吸收与色散谱和振子特性关系

根据光传输振子吸收理论,利用吸收谱定量计算振子的阻尼系数和振子数,这方法可用于凝聚态吸收峰靠近的复杂情况,这对研究介质结构与光学特性有重要意义,我们正利用此方法研究传感薄膜的制备工艺与光学特性。     

水泥基吸波建筑材料的研究进展

阐述了水泥基吸波建筑材料的研究背景,分析了吸波材料的吸波机理以及水泥基吸波建筑材料的设计原理。从掺入超细粉、纤维填充及新型吸波剂3个方向论述了水泥基吸波建筑材料的研究现状,提出了水泥基吸波建筑材料的研究方向。     

对汽车操纵稳定性的影响因素分析及对操稳性的研究评价

主要分析了影响汽车操纵稳定性的原因，介绍了操稳性评价的研究过程及其有待解决的问题。     

减振合金的研究与发展

研究了减振合金的三种内耗形式，动滞后型内耗，静滞后型内耗和阻尼共振型内耗，并研究分析了减振合金的减振机制；复相型合金，铁磁性型合金，位错型合金，共格界面型合金，同时还展望了减振合金的发展前景。     

基于距离选通的非视域成像技术实验

介绍了采用距离选通技术进行非视域成像探测的原理,基于窄脉冲激光器和选通型成像器件搭建了非视域主动成像实验系统。以玻璃作为中介反射面,以黑白条纹靶板作为目标,对目标和周围环境处于不同光照情形时,系统的非视域成像效果进行测试。结果表明,基于距离选通的非视域成像技术是一种能够在不同光照条件下实现对视觉盲区进行有效观察的成像技术。     

Experimental study of miniaturized tip test

A tip test was developed and used successfully for friction measurement between the billet and dies or punches for the cold forging process. In the present investigation, the test was downsized and experimentally investigated to find the size effect on test results. For the test, aluminum alloys of 2024-O and 6061-O were used and the specimen was made into a cylinder of diameter and height of 10.0mm and 5.0mm, respectively. For lubrications, VG32, VG100, grease, and corn oil were used in experiments and tests were also carried out with two different humidity conditions. A micro-hardness test was made to compare the hardness distribution with the strain distribution obtained from the finite element simulation. The load levels and tip distances were measured for Al6061-O specimen with various lubrication conditions and compared to each other to find any correlation between the two. The shear friction factors were determined for various lubrications by using the finite element simulation under the present condition.     

谐波链传动的试验研究

以双支短幅内摆线的等矩曲线作为刚轮的齿廊曲线，设计制作了1台谐波链传动试验样机，通过试验验证了谐波链传动的运动可行性，采用分级加载的方式，证明了该传动装置的承载能力，并且分析了传动装置的速度波动情况。