Aqueous dispersion of 1D van der Waals Mo6S3I6 crystal using biocompatible tri-block copolymer

To achieve the stable dispersion of 1D van der Waals crystal Mo₆S₃I₆ in aqueous media, the tri-block copolymer (Poloxamer) is used as dispersant. The head group of Poloxamer, hydrophobic polypropylene oxide parts can be adsorbed to Mo₆S₃I₆ surface by hydrophobic interaction and the tail group with hydrophilic polyethylene oxide exposed to the outside of the Mo₆S₃I₆ is soluble in water and can form sufficient steric hindrance, resulting in stable aqueous dispersion in nm scale. The excellent biocompatibility of aqueous dispersed nm scale 1D Mo₆S₃I₆ was demonstrated by effective proliferation of C2C12 cells.     

无溶剂环保型单组分潜固化聚氨酯防水涂料的研制

采用环氧大豆油调整产品体系黏度,以潜固化剂固化方式制备了无溶剂单组分聚氨酯防水涂料。讨论了环氧大豆油和醛亚胺类潜固化剂的用量对产品的黏度、VOC含量以及涂膜力学性能的影响。结果表明,环氧大豆油用量在25~30份、潜固化剂的用量在1.5~2.0份时,所制备的无溶剂环保型单组分潜固化聚氨酯防水涂料能满足PU防水涂料GB/T 19250—2013的要求。     

高速永磁同步电机线圈与绕组电枢磁场计算方法及其内在联系

为简化和统一复杂绕组磁场的分析问题,提出一种简易的单匝线圈磁场预测绕组磁场计算方法。基于高速永磁同步电机等效同心圆多层模型和涡流场泊松方程,结合各种介质交界面条件和边界条件,建立了稀疏矩阵形式的单匝线圈电枢磁场的解析方程组。从绕组排布组合形式多样性的特点出发,根据线圈位置和同相线圈连接方式,通过线圈代数化和绕组集合化处理,将线圈和绕组之间的递推关系简化和统一,揭示其关联性。线圈和绕组电枢磁场的解析计算方法和内部关系得到有限元仿真和相关文献计算方法的证实,结果表明了使用单匝线圈磁场研究绕组磁场问题的准确性和可行性。最后基于相关计算方法和内部关系的研究,分析了绕组合成磁场时空谐波的规律。     

黄山鲁森林公园白水湖景区及山顶景观工程规划

黄山鲁森林公园位于南沙区的中心城区（小南沙）内,是南沙区中心城区的生态绿色核心,是都市中珍贵的绿色资源。整个公园占地约1200多公顷,主峰海拔295 m是广州南部地区的最高峰,是广州地区最大的开放式森林公园。     

Development of plasma sources for Dipole Research EXperiment (DREX)

Dipole Research EXperiment(DREX) is a new terrella device as part of the Space Plasma Environment Research Facility(SPERF) for laboratory studies of space physics relevant to the inner magnetospheric plasmas. Adequate plasma sources are very important for DREX to achieve its scientific goals. According to different research requirements, there are two density regimes for DREX. The low density regime will be achieved by an electron cyclotron resonance(ECR) system for the ‘whistler/chorus' wave investigation, while the high density regime will be achieved by biased cold cathode discharge for the desired ‘Alfvén' wave study. The parameters of ‘whistler/chorus' waves and ‘Alfvén' waves are determined by the scaling law between space and laboratory plasmas in the current device. In this paper, the initial design of these two plasma sources for DREX is described. Focus is placed on the chosen frequency and operation mode of the ECR system which will produce relatively low density ‘artificial radiation belt' plasmas and the seed electrons, followed by the design of biased cold cathode discharge to generate plasma with high density.     

喇嘛甸油田"高效聪明井"布井方法

喇嘛甸油田进入特高含水期后,综合含水高、采出程度低、无效低效循环严重,剩余油分布零散,挖潜难度大.为最大限度挖潜剩余油,结合油田稳产形势,在搞清油田各套层系井网开发状况、各类储层动用状况、剩余油成因及分布状况基础上,利用储层精细解剖技术,结合井震结合技术以及动态分析方法,实现对储层砂体发育、构造特征的精细描述及剩余油分...     

InGaAs近红外探测器高可靠封装技术

对256元和512元InGaAs线列探测器进行了气密封装,对封装结构和工艺中的几个关键技术进行了分析,包括热电致冷器的热负载性能、温度烘烤性能、组件密封性.研究结果表明:在室温条件下,热电致冷器的致冷温差可以达到55K以上,热负载每增加50 mW,致冷温差下降约0.51 K,能够满足组件的使用要求.经过120℃、500...