水雷锂离子电池组充电控制策略研究

为解决某型水雷大容量锂离子电池组充电过程中存在的安全问题,缩短充电时间,提高单体电池一致性,设计了水雷锂离子电池组充电管理系统。采用恒流串充-恒压串充-并联均衡充电的充电控制策略,兼顾了锂离子电池安全性和充电效率,延长了锂离子电池组的使用寿命,从而提高了水雷的维护和保障能力。     

智能地雷爆炸成形弹丸着点偏差分析

智能地雷探测系统发现目标后,由母雷发射攻顶子弹,子弹通过敏感器识别目标并发射爆炸成形弹丸攻击目标。攻击过程时间短且动作复杂,因此有必要分析命中精度。通过研究运动学原理,建立以攻顶子弹、爆炸成形弹丸、攻击目标相对位置为依据的计算模型,计算了爆炸成形弹丸着点的偏差。计算表明:爆炸成形弹丸的命中精度与攻顶子弹的飞行状态、敏感器的性能和目标运动状态有关。研究结果为智能地雷总体设计提供了理论依据。     

一种矿用二氧化氮传感器的检测方法

矿用二氧化氮传感器是煤矿常用的气体检测仪表,针对煤矿需求开发的矿用二氧化氮传感器,需要满足煤矿矿用产品要求。文章提出一种矿用二氧化氮传感器检测方法,说明矿用二氧化氮传感器需要满足的技术参数,供实验室检测人员借鉴,也为设计制造矿用二氧化氮传感器提供了参考。     

Controlled Folding of 2D Au–Polymer Brush Composites into 3D Microstructures

Microscale, quasi‐2D Au–polymer brush composite objects are fabricated by a versatile, controllable process based on microcontact printing followed by brush growth and etching of the substrate. These objects fold into 3D microstructures in response to a stimulus: crosslinked poly(glycidyl methacrylate) (PGMA) brushes fold on immersion in MeOH, and poly(methacryloxyethyl trimethylammonium chloride) (PMETAC) brushes fold on addition of salt. Microcages and microcontainers are fabricated. A multistep microcontact printing process is also used to create sheets of Au–PGMA bilayer lines linked by a PGMA film, which fold into cylindrical tubes. The bending of these objects can be predicted, and hence predefined during the synthesis process by controlling the parameters of the gold layer, and of the polymer brush.     

郁金香杂色综合症病原的免疫电镜鉴定与检测研究

免疫胶体金标记技术的鉴定结果表明,造成郁金香杂色综合症的主要病原是ＴＢＶ,其次也有少量的植株被ＴＢＢＶ、ＴＴＢＶ及ＣＭＶ所感染。ＴＢＶ及ＴＴＢＶ病毒主要在花瓣和叶片中增殖与积累,并通过种球传给后代。ＴＢＶ和ＴＢＢＶ可共同识别某些植株的病原,说明二者应属同一种病毒的不同株系。     

大气激光通信PPM调制解调系统设计与仿真研究

脉冲位置调制(PPM)是大气激光通信的关键技术之一,可以减少激光器的发射功率,增加通信距离。从实际出发,采用高速数字信号处理器(DSP)设计出PPM调制解调系统;同时介绍了PPM解调时对时隙同步和帧同步的处理方法。仿真结果表明,该调制解调系统具有较好的抗干扰能力,可以满足通信系统的要求。     

煤矿危险源辨识与风险管理信息系统开发与探究

信息处理的滞后和不全面严重威胁着南梁煤矿安全预防工作的顺利进行。通过对危险源进行辨识,通过危险源等级的划分,完成基于风险矩阵的风险评估方法,有效的对危险源的风险有效的进行了管理,为危险源评估提供了有效的评估方式,对危险源进行分级分类,监测预警和控制,建立危险源辨识动态管理系统,在综合分析近年来安全管理信息化系统研究成果的基础上,进行煤矿危险源辨识及风险管理信息系统研究。     

微细浸染型金矿强化湿法预处理研究

采用两段充气预处理-非氰化工艺浸出微细浸染型金矿,研究了浸出条件对金浸出效率的影响。结果表明,在氧化和碱浸预处理2个阶段充气可提高金浸出率;氧化预处理2 h后,加入氢氧化钠(20 kg/t)碱浸预处理4 h,加入氧化钙(40 kg/t)替代氢氧化钠,用TY-3浸出剂(8 kg/t)浸出4 h,金浸出率可达87.21%。浸出渣的物相分析、扫描电镜观察及X射线能谱分析结果显示,硅酸盐、碳酸盐中的金可被有效浸出,浸出渣中的石英、黄铁矿表面发生腐蚀,部分黄铁矿氧化。     

“Ship‐in‐a‐Bottle” Growth of Noble Metal Nanostructures

Noble metal nanostructures are grown inside hollow mesoporous silica microspheres using “ship‐in‐a‐bottle” growth. Small Au seeds are first introduced into the interior of the hollow microspheres. Au nanorods with synthetically tunable longitudinal plasmon wavelengths and Au nanospheres are obtained through seed‐mediated growth within the microspheres. The encapsulated Au nanocrystals are further coated with Pd or Pt shells. The microsphere‐encapsulated bimetallic core/shell nanostructures can function as catalysts. They exhibit high catalytic performance and their stability is superior to that of the corresponding unencapsulated core/shell nanostructures in the catalytic oxidation of o‐phenylenediamine with hydrogen peroxide. Therefore, these hollow microsphere‐encapsulated metal nanostructures are promising as recoverable and efficient catalysts for various liquid‐phase catalytic reactions.     

Surface Regulation Towards Stimuli‐Responsive Luminescence of Ultrasmall Thiolated Gold Nanoparticles for Ratiometric Imaging

The surface chemistry of the ultrasmall thiolated gold nanoparticles (AuNPs, < 3.0 nm) plays key roles in both governing the intrinsic emission and establishing interfaces surrounded by various amine‐containing biomolecules in the biomedical applications such as imaging, targeting, and diagnostics. However, a fundamental understanding of the surface ligand's role in the stimuli‐responsive emissions of AuNPs toward the amine molecules is currently lacking. Here, through investigation of the thiolate surface and exotic amine structures, it is discovered that the nucleophilic amines tend to closely bind the electrophilic gold surface, generating a high‐energy stimuli‐responsive emission from the low‐energy intrinsically emitting AuNPs. Both the intrinsic and stimuli‐responsive emissions show a unique amine concentration‐dependent ratiometric pattern for quantitative assessments of important biogenic amines in the biological samples. This discovery opens a new pathway to the design of stimuli‐responsive AuNPs, and would promote more experimental and theoretical research on the application‐driven surface engineering for advanced biological applications.