超磁致驱动器迟滞系统逆模补偿控制

设计了超磁致驱动器和实验系统。针对超磁致伸缩执行器的磁滞非线性问题，对迟滞系统进行了可逆性分析后，采用BP神经网络对超磁致驱动器的迟滞特性建立了逆模型。分别进行了有逆模前馈的开环控制、传统PID控制和PID加逆模前馈的闭环控制来补偿迟滞特性。实验结果表明，逆模前馈补偿器有效地减小了系统的非线性误差，提高了执行器的控制精度。     

保护大熊猫遗传多样性——拯救人工饲养下的 大熊猫种群的历史回顾

对1984—1995年中国拯救大熊猫物种工作进行历史回顾:创建了中国动物园协会;成都大熊猫繁育研究基地落成;促成建设部和林业部2个部门的合作;与多国政府及非政府组织磋商,达成多项国际合作;推行"动物园是野生动物移地保护基地"的理念;启动了为大熊猫种群开辟新栖息地——"大熊猫进,人类退"的前期工程。该时期开创了拯救人工饲养下的大熊猫种群工作的系统工程,成功拯救了动物园濒临灭绝的大熊猫种群,在国际上被誉为中国的奇迹。     

内蒙古东升庙矿区锌多金属硫铁矿深部勘查发现及启示

中化内蒙地勘院近年来完成了内蒙古自治区乌拉特后旗东升庙矿区深部的矿产普查工作,在矿区深部发现一大型锌多金属硫铁矿床,随后完成了东升庙矿区深部勘探。东升庙矿区深部大型锌多金属硫铁矿床是东升庙矿床矿体的延伸部分,为老矿区深部找矿的新发现。东升庙矿床属于形成于中元古界渣尔泰山群增隆昌组、阿古鲁沟组石墨片岩和石墨白云石大理岩(原岩分别为泥质碎屑岩和白云岩)中的介于SEDEX型和VMS型矿床之间的过渡型喷流—沉积矿床。当时的形成环境为狼山裂陷槽中东升庙同生沉积盆地,同生断裂控制了矿体的形成与展布。文章叙述了东升庙矿区深部及东部外围的勘查过程,给出了对地质找矿工作的9点启示,验证了对矿床成因的认识程度往往决定找矿勘查的成效。     

巨型工程机械子午线轮胎高强度、低生热胎面基部胶配方开发

通过对国外知名品牌37.00R57和40.00R57规格巨型工程机械子午线轮胎胎面基部胶组成分析和物理性能测试,对我公司巨型工程机械子午线轮胎胎面基部胶配方进行优化设计。新开发配方半成品和成品胶料动态损耗因子分别降低37.9%和26.6%,胶料物理性能达到竞品水平,成品轮胎TKPH提升13.6%。     

Synthesis of Sulfur‐Based Biocompatible Nonionic Surfactants and Their Nano‐Vesicle Drug Delivery

Nonionic surfactants are capable of forming nano‐range vesicles upon self‐assembling in an aqueous medium. These vesicles are highly stable, low in toxicity, and cost‐effective. Owing to their ability to solubilize both hydrophilic and hydrophobic substances, they are of great interest for drug solubilization and delivery. This study describes the synthesis and characterization of two new nonionic surfactants and their screening for biocompatibility and drug loading potentials in nano‐scale niosomal vesicles. They were characterized through mass spectroscopy, ¹HNMR, and FT‐IR. Their critical micelle concentration (CMC) was investigated using UV–vis spectrophotometry. The biocompatibility study was carried out through blood hemolysis and in vitro cytotoxicity assays. The surfactants have very low CMC values, are highly hemo‐compatible, and were nontoxic when tested against a cell culture. They were able to form nano‐range niosomal vesicles with large variation in their size. Both new surfactants were able to encapsulate increased amounts of the drug, in this case clarithromycin. The chemical nature of the drug remained intact in the niosomal vesicles. The results suggest that these nonionic surfactants could be promising drug delivery vehicles.     

超磁致伸缩材料的性能测试及应用

测试了Terfenol-D磁致伸缩棒的磁致伸缩性能,并利用此性能在机械构件上推广应用。取Terfenol-D磁致伸缩棒放在测试仪上,对测试仪进行加压、通电、标定等进行初始化,然后给测试仪线圈传送变化的电流值,不同的电流会引起磁致伸缩棒周围按照一定规律变化,最后观察传送回的应变位移数据,通过这些数据进行计算、总结、图表分析。Terfenol-D磁致伸缩棒磁致伸缩系数在磁场强度增加初期增长率较小,当驱动磁场强度继续增加时,磁致伸缩系数增加得很快并且线性较好,当磁场强度再持续增加时,磁致伸缩系数增长开始变缓,并逐渐趋于饱和状态。Terfenol-D磁致伸缩棒的磁致伸缩性能优于其他材料,并可以对位移进行更加精确地控制。     

《110》和《112》取向Tb-Dy-Fe超磁致伸缩合金的定向生长

采用区熔定向凝固方法,在30-720 mm/h生长速度范围内,均能获得〈110〉轴向择优取向生长的Tb-Dy-Fe合金;凝固形态随生长速度提高出现从平面晶到胞状晶、树枝晶转变;低速生长(30 mm/h)的样品磁致伸缩性能没有压力效应,高速生长(≥120 mm/h)的样品磁致伸缩性能具有明显的压力效应.低生长速度时〈110〉取向样品按双{111}系孪晶生长,高生长速度时按单{111}系孪晶生长,由此计算样品的磁致伸缩性能与实验结果基本吻合在更高生长速度下(900 mm/h)获得沿〈112〉轴向高度择优取向的样品,其磁致伸缩性能与高生长速度〈110〉取向样品性能相当,具有明显的压力效应.     

五十点焊机同步低压冲击大电流焊接方法的研究

研究了五十点焊机的同步低压冲击大电流焊接方法。在分析低压冲击大电流焊接过程的基础上,对小型化五十点同步冲击焊接大电流的晶闸管控制开关和储能箱工艺进行了实验研究。经生产应用,研究的焊接方法用于五十点焊机,提高了焊机的生产效率和焊接质量,降低陀的装机容量。     

Fe73.5Cu1Nb3Si13.5B9非晶丝扭矩阻抗（TGI）效应的研究

本文研究了测量频率、焦耳退火处理及扭矩焦耳退火处理对Fe73.5Cu1Nb3Si13.5B9非晶丝TGI效应的影响。实验表明淬态Fe73.5Cu1Nb3Si13.5B9非晶丝TGI效应的最佳测量频率为7 MHz;对样品进行焦耳退火处理可以提高样品的阻抗变化率,测量频率为7 MHz时,焦耳退火处理的最佳电流密度为32 A/mm2,最大阻抗变化率达198%;扭矩焦耳退火处理后,样品TGI效应的非对称性随着预加扭矩的增大而增大,同时阻抗变化率峰值减小。     

Effect of glass removal on the GMI effect of Co71.8Fe4.9Nb0.8Si7.5B15 amorphous glass-covered wires

During the past several years, giant magneto-impedance effect (GMI) in amorphous wires has generated growing interest in the science community because of theirapplications in sensors. The giant magneto-impedance effect in Co71.8Fe4.9Nb0.8Si7.5B15 amorphous glass-covered wires (AGCW) consists of strong changes in the high frequency impedance with a small DC magnetic field. When f =1 MHz, there is no GMI effect due to the fact that the magnetic penetration depth is higher than their radius. As the frequency increases, the GMI effect becomes important in both the glass-covered wire and the wire afterglass removal. Field dependence of the impedance has a similar behaviour to the AGCW ones, when a tensile stress is applied to the wire without glass cover.