摘要：Zero-dimensional metal halide perovskites have captured intense research interest owing to their unique optoelectronic ***,metal halides with the ns^(2) electronic configuration are of great interest owing to the high-temperature sensitivity of their photoluminescence,which could be applied to remote optical thermometry(ROT).Herein,all-inorganic and lead-free halide perovskite Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O single crystals(SCs)were prepared through the hydrothermal method and showed a strong temperature dependence of photoluminescence *** Te^(4+) doping,the nonemissive Cs_(2)InCl_(5)·H_(2)O SC exhibits a bright orange emission at 660 nm with a wide full width at half maximum of 180 *** strong phonon-exciton coupling promotes the formation of self-trapped excitons in the soft lattice of the zero-dimensional Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O *** Te^(4+) ions with the 5 s^(2) electronic configuration endow the Te^(4+)-doped Cs_(2)InCl_(5)·H_(2)O SC with a strong temperaturedependent photoluminescence *** SC reaches a maximum specific sensitivity of 0.062 K^(-1) at 320 K,thereby showing the potential advantages of indium-based metal halide perovskites in ROT applications.

摘要：Most model generated projections of climate change for the future decades only consider anthro- pogenic activities. It is hard to think about the effects of solar activity and volcano effects, because the pre- dictions of both solar activity and volcano effects are difficult. But as we know, the sun is the source of en- ergy for the Earth＇s climate system, and observations show it to be a variable star.

摘要：Evaluation and projection of temperature extremes over China are carried out with 8 model datasets from CMIF5. Compared with the NCEP reanalysis data, multi-model weighted ensemble is capable of reproducing the 8 temperature extreme indices and 20-yeax return values of annual maximum/minimum temperatures. The time correlation coefficients of all the 8 indices between multi-model ensemble and the reanalysis can reach a significance level of 0.10. The spatial correlation coefficient of 20-year return level of annual maximum/minimum temperatures is greater than 0.98. Under the RCP4.5 scenario, more extreme warm events and less cold events are expected over China in multi-model ensemble. By the middle of the 21st century, the heat wave duration index will be multiplied 2.6 times. At the end of the 21st century, the cold wave duration index will decrease 71%, and the 20-year return value will increase 4℃ in parts of China for the maximum/minimum temperatures.

摘要：Gd50Al3oCo20 wires show excellent magnetocaloric properties and high heat exchange rate due to the microsize. The Weibull and lognormal methods were used for systematically analyzing its mechanical properties for matching the design requirements in cooling system. The wire exhibits average fracture strength of-969.5 MPa and typical fracture behavior of amorphous character. Moreover, the distributions of stresses for tensile strains at 10 values are estimated by probability plot and Chi-square goodness-of-fit test. The random stresses were best fitted by lognormal probability distribution for most studied cases; however, fracture strength was best fitted by Weibull probability distribution. It is interesting to note that the mean and standard deviation of the stresses （to reach specific tensile strain） increase as the tensile strain grows, accompanied by the coefficients of variation of stresses which decrease smoothly. It is concluded that the inhomogeneity of material does cause the scatter of stresses growth, and the scatter could be considerably large.

摘要：A new substrate,aligned Ag nanowires decorated with silver nanoparticle composite structure(AgNWs@AgNPs),was fabricated to investigate metalenhanced fluorescence(MEF) and its *** new composite structure was fabricated via a three-phase interface assembly method followed by SnCl2 sensitization and AgNO3 reduction *** size and distribution of the nanoparticles on silver nanowires increased with the sensitization and reduction *** formation of AgNPs on the surfaces of AgNWs was confirmed by multiple characterization methods including scanning electron microscopy(SEM),transmission electron microscope(TEM),atomic force microscopy(AFM) and X-ray diffraction(XRD).The results show that the fluorescence intensity of the poly(3-hexylthiophene)(P3HT) on the composite structure was greatly enhanced compared with that on bare glass substrate,and the intensity increased with the increase in particle sizes and *** mechanism was basedo n the increase in excitation rate and the radiation decay *** new type of substrate could serve as a good and efficient MEF substrate for high-performance fluorescence-based devices.

摘要：垂直腔面发射激光器(VCSEL)是原子磁强计和原子钟等光学量子仪器的核心部件,其输出激光的稳定性将直接影响仪器的测量精度和灵敏度等关键参数。本文介绍了一种以ZYNQ7010为控制核心的VCSEL数字驱动电路,该电路使用XTR111芯片提供VCSEL所需的高稳定电流,并通过MAX1978芯片控制VCSEL内部集成的半导体制冷器(TEC)实现高精度温控。实验结果表明,本文设计的驱动电路可输出0~2 mA的线性可调电流,调节精度优于0.04 mA,TEC的温控精度优于0.1℃;最终在1.325 mA的驱动电流和63℃的工作温度下,VCSEL的最大输出功率漂移和波长漂移分别为0.001 mW和0.004 nm。该数字驱动电路可满足原子磁强计等高精度测量仪器对光源驱动的需求。

摘要：对准相位匹配周期性极化铌酸锂 (PPLN)倍频进行了理论研究 ,并对聚焦高斯光束条件下的倍频耦合波方程进行了求解 ,给出了准相位匹配倍频转换效率公式 ,分析了晶体长度与聚焦程度的关系 ,在此基础上对倍频谐振腔进行了优化设计 ,以期获得最大的倍频转换效率 .本结果对准相位匹配倍频器件的设计具有一定的指导意义 .

摘要：对工业建筑抗震的关键技术难题,建立动态多目标抗震设防理论,创建承载力、刚度、延性相互匹配的量化性能指标体系;提出体系层次化、构件梯次化的抗震设计方法,并给出相应的量化控制准则,解决了工业建筑防地震连续倒塌的技术难题;基于结构耗能能力和耗能需求的逻辑关系提出抗震冗余度需求比的概念,并给出量化分级评价标准;提出基于等能量原理的抗震优化设计方法,理顺钢结构抗震设计中的刚度、强度和延性的逻辑匹配关系,弥补现行规范的若干不足;提出设备-结构耦联效应简化设计方法,并给出考虑耦联作用的界限指标;依据现有的地震危险性研究成果,建立地震地面运动峰值加速度的重现期调整系数确定方法,攻克特定后续使用年限条件下抗震性能评价的关键技术难题;研发质量可调TMD减震系统、特种功能材料、在役预应力加固工艺等系列技术,有效解决连续生产条件下的抗震性能提升问题。

摘要：基于有限元法、优化设计理论和模态试验方法,利用ANSYS优化设计方法,将理论模态分析和实验模态分析相结合,对某铣床的关键结合面的特性参数进行参数识别,研究结合面对铣床关键部件动态特性的影响,得到相关影响曲线。结果表明,随着结合面刚度的增加,部件的固有频率有提高也有降低;但随着阻尼总的增加,部件的固有频率始终降低,振型大大衰减。本研究为整体复杂机械的改进设计和动态优化设计提供理论依据。

摘要：生物材料的感染限制了生物材料的进一步应用。细菌在材料表面粘附、生长成细菌生物膜是生物材料相关感染难治的根本原因。因此,最有效的解决方法是防止细菌生物膜的形成。本文对目前抗菌生物材料的研究现状进行综述,提出目前防止细菌生物膜生成的方法主要有三种:抗细菌粘附的方法;杀菌的方法及二者相结合的方法。在设计抗粘附生物材料时,除了考虑材料表面的化学结构外,也要考虑材料的表面拓扑结构及材料的本体性能对细菌粘附的影响;在设计杀菌的生物材料时,不但要考虑杀菌性能,也要考虑杀菌剂对材料血液相容性的影响。总的来说,抗粘附的方法及杀菌相结合(多重抗菌)的方法是可望解决生物材料感染的一条新方法。