摘要：Recent experiments report the rotation of FA(FA=HC[NH2]2+)cations significantly influence the excited-state lifetime of ***,the underlying mechanism remains *** ab initio nonadiabatic(NA)molecular dynamics combined with time-domain density functional simulations,we have demonstrated that reorientation of partial FA cations significantly inhibits nonradiative electron-hole recombination with respect to the pristine FAPbI3 due to the decreased NA coupling by localizing electron and hole in different positions and the suppressed atomic *** nuclear motions simultaneously increase the decoherence time,which is overcome by the reduced NA coupling,extending electron-hole recombination time scales to several nanoseconds and being about 3.9 times longer than that in pristine FAPbI3,which occurs within sub-nanosecond and agrees with *** study established the mechanism for the experimentally reported prolonged excited-state lifetime,providing a rational strategy for design of high performance of perovskite solar cells and optoelectronic devices.

摘要：在零部件的设计中,对于相同结构下不同型号的零部件若在设计中不断地对模型的尺寸进行修改和调整,会极大地延长产品的开发周期及生产效率。针对这一问题,以某企业的一种压力容器系列化产品为例,使用CATIA进行参数化建模,并借助Excel表建立起一个简单实用的压力容器系列化库,可实现各型号压力容器的快捷调用。经实际应用,证明该设计方法能够快速地设计出满足客户需求的产品,同时可对库中的不同型号产品进行管理和配置。

摘要：本文是一篇近两个月的锂电池文献评述,以“lithium”和“batter”为关键词检索了Web of Science从2024年10月1日至2024年11月30日上线的锂电池研究论文,共有6602篇,选择其中100篇加以评论。正极材料方面主要研究了高镍三元的包覆和掺杂改性,以及其在高电压下所发生的表面和体相的结构演变。合金化储锂负极材料的研究侧重于复合电极结构设计和各类黏结剂的开发,以缓解循环过程中负极材料的体积变化,维持电极完整性。固态电解质的研究主要包括对现有固态电解质的合成、掺杂、结构设计、稳定性和相关性能研究以及对新型固态电解质的探索。其他电解液和添加剂的研究则主要包括不同电解质和溶剂对各类电池材料体系适配的研究,以及对新的功能性添加剂的探索。固态电池方向更多关注于复合正极设计、界面改性和影响锂枝晶生长的因素,同时出现了更多关于固态锂硫电池的研究论文。关于电池产热和气体成分、失效机制、热失控、界面稳定性的电池模型、表征和分析论文也有多篇。理论模拟工作多是关于无机固体电解质中离子输运的研究。

摘要：AIM： To identify the gene （s） related to the antagonistic activity of Enterobacter cloacae B8 and to elucidate its antagonistic mechanism. METHODS： Transposon-mediated mutagenesis and tagging method and cassette PCR-based chromosomal walking method were adopted to isolate the mutant strain （s） of B8 that lost the antagonistic activity and to clone DNA fragments around Tn5 insertion site. Sequence compiling and open reading frame （ORF） finding were done with DNAStar program and homologous sequence and conserved domain searches were performed with BlastN or BlastP programs at ***. To verify the gene involved in the antagonistic activity, complementation of a full-length clone of the anrFgene to the mutant B8F strain was used. RESULTS： A 3 321 bp contig around the Tn5 insertion site was obtained and an ORF of 2 634 bp in length designated as anrFgene encoding for a 877 aa polyketide synthase-like protein was identified. It had a homology of 83% at the nucleotide level and 79% ID/87% SIM at the protein level, to the admM gene of Pantoea agglomerans andrimid biosynthetic gene cluster （AY192157）. The Tn5 was inserted at 2 420 bp of the gene corresponding to the COG3319 （the thioesterase domain of type I polyketide synthase） coding region on BSF. The antagonistic activity against Xanthomonas oryzae pv. oryzae was resumed with complementation of the full-length anrFgene to the mutant B8F. CONCLUSION： The anrFgene obtained is related to the antagonistic activity of BS, and the antagonistic substances produced by B8 are andrimid and/or its analogs.

摘要：Entity recognition and disambiguation （ERD） is a crucial technique for knowledge base population and information extraction. In recent years, numerous papers have been published on this subject, and various ERD systems have been developed. However, there are still some confusions over the ERD field for a fair and complete comparison of these systems. Therefore, it is of emerging interest to develop a unified evaluation framework. In this paper, we present an easy-to-use evaluation framework （EUEF）, which aims at facilitating the evaluation process and giving a fair comparison of ERD systems. EUEF is well designed and released to the public as an open source, and thus could be easily extended with novel ERD systems, datasets, and evaluation metrics. It is easy to discover the advantages and disadvantages of a specific ERD system and its components based on EUEF. We perform a comparison of several popular and publicly available ERD systems by using EUEF, and draw some interesting conclusions after a detailed analysis.

摘要：考虑通信延时影响的车辆队列控制问题,提出一种基于观测器的分布式车辆队列纵向控制器.首先,基于分层控制策略分别设计上下层控制器,通过上层控制器优化期望加速度、下层控制器克服车辆模型非线性实现期望加速度和实际加速度的一致.上层控制器设计过程中,基于三阶线性化车辆模型,考虑观测器、车辆动态耦合特性和通信延时,提出一种通信延时环境下基于观测器的车辆队列控制器,利用观测器估计领导车辆加速度信息从而减轻通信负担.然后,利用Lyapunov-Krasovskii方法分析车辆队列的稳定性,并得出通信延时上界,同时利用传递函数方法分析了串稳定性.最后,通过数值仿真验证上层控制器的有效性和稳定性.在此基础上,利用PreScan软件中高保真车辆动态模型,验证了该分层控制策略的有效性.

摘要：空间外差光谱技术综合了光栅衍射与空间调制干涉两种技术特点。由于干涉仪胶合与光栅刻划过程中存在误差,使得系统平场与理论设计值存在偏差。本文探讨了空间外差光谱仪系统平场定标的原理,通过干涉条纹频率公式推导出了系统平场定标的基本公式,设计了可调谐激光导入消散斑积分球定标方法及定标装置。针对中科院安徽光机所研制的用于大气CO2精细吸收光谱(1 575nm吸收带)探测的空间外差光谱仪样机开展了平场定标实验。定标结果表明,仪器的实际平场波长比理论设计值向短波方向漂移了约0.05nm,满足仪器设计要求。

摘要：针对压电机敏柔性结构振动主动控制研究,以PA95功放芯片为核心,设计与开发了一种适合驱动压电陶瓷作动器的新型高压功率放大器;阐述了压电功率放大器的设计方案,通过对PA95放大器芯片工作原理和特性指标的介绍,分析了符合容性负载特殊要求的压电功率放大器设计方法和实现关键技术,以及功率放大器的幅频/相频特性和主要特性功能;实验表明设计开发效果良好,在5 kHz频率范围内有效实现±5 V信号到±350 V的动态放大,最大稳态输出电流120 mA。

摘要：Dynamically crosslinked materials generally lose their self-healing ability and mechanical robustness in aqueous,acidic,and basic environments due to disruption of their dynamic interactions and ***,a micelle-like structure with a hydrophobic outer layer is used to protect ionic *** structure ensures the self-healing and long-term stability of the ionically crosslinked elastomers in aqueous,acidic,and basic *** elastomer possesses a tensile strength of 6.7 MPa and a strain at break of 1400%,which is superior to the existing waterproof selfhealing *** strain sensors and dielectric actuators based on the elastomer are highly stable and self-healable,even in extremely harsh *** design strategy of hydrophobic protection for dynamic interactions is quite general,allowing it to be extended to other self-healing materials.

摘要：为吸取磁栅位移传感器的优点并避免精度和分辨率较低的问题,设计了一种新型的磁栅位移传感器,磁头由线性霍尔元件阵列组成,磁栅由永磁体阵列构成。为提高原始电压信号的质量,采用三相六元件的信号发生方案,通过差分处理滤除了由于装配偏差和零点漂移带来的信号误差,并对磁栅信号发生装置结构进行了ANSYS有限元电磁场分析,依据磁场分析的结果选择磁头安装间隙。在磁栅绝对位移实现方面,采用两排磁钢的方法,一排编码,记录磁头所在的周期;一排用来记录每个正弦周期的相对位移。相对位移选择了基于查表方式的信号处理算法,降低了处理芯片的运算量,并通过对高性能的16位嵌入式单片机dsPIC33FJ64MC706的开发实现了此算法。简化了信号处理硬件的外围电路,满足了磁栅小型化的设计要求,而且实现了磁栅高速的运算能力和实时的信号处理功能,提高了磁栅的分辨率和工作可靠性。