摘要：Trap-mediated energy loss in the buried interface with non-exposed feature constitutes one of the serious challenges for achieving high-performance perovskite solar cells(PSCs).Inspired by the adhesion mechanism of mussels,herein,three catechol derivatives with functional Lewis base groups,namely 3,4-Dihydroxyphenylalanine(DOPA),3,4-Dihydroxyphenethylamine(DA)and 3-(3,4-Dihydroxyphenyl)propionic acid(DPPA),were strategically *** molecules as interfacial linkers are incorporated into the buried interface between perovskite and SnO_(2) surface,achieving bilateral synergetic passivation *** crosslinking can produce secondary bonding with the undercoordinated Pb^(2+) and Sn^(4+) *** PSCs treated with DOPA exhibited the best performance and operational *** the DOPA passivation,a stabilized power conversion efficiency(PCE)of 21.5%was demonstrated for the planar *** 55 days of room-temperature storage,the unencapsulated devices with the DOPA crosslinker could still maintain 85%of their initial performance in air under relative humidity of-15%.This work opens up a new strategy for passivating the buried interfaces of perovskite photovoltaics and also provides important insights into designing defect passivation agents for other perovskite optoelectronic devices,such as light-emitting diodes,photodetectors,and lasers.

摘要：Proton conduction controlled by light is important for advanced applications in sensors and information processing *** herein report a metal-organic framework(MOF)thin film by introducing indocyanine green dye into HSB-W5(HSB=hydrogenated Schiff base)matrix(ICG@HSB-W5)to construct a series of basic logic gates(NOT,NAND,and NOR)on account of its good photothermal conversion ability and photo-controlled proton *** proton conductivity of ICG@HSB-W5 thin film is 25 times higher than that of the pristine HSB-W5 thin film and responses efficiently to *** addition,the change of proton conductivity is very large with an ON/OFF ratio above1000 and enough to be distinguished to build logic *** this logic gate system,808-and 405-nm lasers are used as inputs and the proton conductivity is used as output signal with different *** electrical output signal is convenient and available to be received and *** offers a new route for the design of molecular logic gates based on MOF and facilitates the construction of proton-based logic gate or more complicated logic devices.

摘要：随着信息技术和网络技术的发展,各种应用系统不断涌现,系统管理员的工作量不断增大,对于各个系统用户的管理也越来越复杂,他们迫切需要能够有一个集中统一的认证及授权系统。针对这一现象,研究了单点登录和集中用户管理的需求,着重介绍了系统的设计与实现的关键技术,提出了一套安全、可靠、高效的单点登录系统。

摘要：基于反射式强度调制机制,设计了用于测量篦齿密封间隙的光纤位移传感器。通过对静态标定试验数据的分析处理,得到了静态下激光光纤探头的输出值与模拟试验件和探头之间距离的相互对应关系。试验证明,该设计方案可行,测量精度能达到预期目标。

摘要：卡车油箱在使用过程中,存在因振动产生本体及焊缝开裂的问题。针对某400 L卡车柴油油箱,基于流固耦合理论,运用ANSYS软件分析油箱的振动特性。锤击法模态试验和仿真模态分析结果,仿真与试验测得的结构模态参数数据误差最大为13%,仿真的准确性得到验证。油箱结构自由状态下计算得到的前6阶固有频率略大于油箱安装状态下的固有频率,油箱固有频率会随着液体含量的增加而降低。油箱的固有频率在液体量从0到100 L以及300到400 L这两阶段变化明显。油箱充液比低于1/2时,油箱结构的各阶固有频率均高于危险区域的频率,不会产生共振。充液量大于3/4时固有频率接近于30 Hz的标准规定值,存在共振风险。油箱设计时,应优化油箱的结构,使其在充满液量时也能避开30 Hz标准值,更为安全。