摘要：An optimized compound 9-(9,9-dimethylacridin-10(9 H)-yl)-6 H-benzo[c]ch-romen-6-one(MAB) was designed and synthesized based on our previously reported TADF emitter 6-(9,9-dimethylacridin-10(9 H)-yl)-3-methyl-1 H-isochromen-1-one(MAC) to further improve the performance of thermally activated delayed fluorescence(TADF)emitters. With the additional phenyl in coumarin-contained plane, MAB possesses an extended distribution of the lowest unoccupied molecular orbitals(LUMO), and thus realizes reduced electron exchange between the frontier molecular orbitals and a stretched molecular dipole moment compared with MAC. MAB based organic light-emitting diode(OLED)exhibits a remarkable maximum external quantum efficiency(EQE) of 21.7%, which is much better than the maximum EQE of MAC-based OLED with a value of 12.8%. Our work proves that extending the distribution of LUMO is a simple but effective method to improve the efficiency of TADF emitter.

摘要：By connecting tercarbazole(3 Cz)and triphenyltriazine(TRz)units with a diphenyl ether group,we designed and synthesized a new donor-spacer-acceptor structure molecule9’-(4-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenoxy)phenyl)-9’H-9,3’:6’,9"-tercarbazole(3 Cz-o-TRz)as the multifunctional component of exciplex *** expected,the intermolecular charge-transfer transition is dominant for3 Cz-o-TRz because of the space-enough and conjugation-forbidden linkage of the diphenyl ether group,increasing the intrinsic characteristics of the 3 Cz and TRz moieties in its single-molecule ***,three common electron acceptors(4,6-bis(3,5-di(pyridin-3-yl)phenyl)-2-methylpyrimidine(B3 PyMPm),4,6-bis(3,5-di(pyridin-4-yl)phenyl)-2-methylpyrimidine(B4 PyMPm),and(1,3,5-triazine-2,4,6-triyl)tris(benzene-3,1-diyl)tris(diphenylphosphineoxide)(POT2 T))and three common electron donors(4,4’-(cyclohexane-1,1-diyl)bis(N,N-di-p-tolylaniline)(TAPC),tris(4-(10 H-phenoxazin-10-yl)phenyl)amine(TPA-PXZ),and N1-phenyl-N4,N4-bis(4-(phenyl(m-tolyl)amino)phenyl)-N1-(m-tolyl)benzene-1,4-diamine(m-MTDATA))were chosen to construct six exciplex emitters with 3 *** the organic light-emitting diodes(OLEDs),the emission spectra of these exciplex emitters could be gradually modulated from 510 to 590 *** addition,TAPC:3 Cz-o-TRz-and 3 Cz-o-TRz:PO-T2 T-based OLEDs achieved desirable performance with maximum external quantum efficiencies(EQEs)around 12%.Moreover,a simple tandem OLED containing TAPC:3 Cz-o-TRz and 3 Czo-TRz:PO-T2 T emitters realized optimal performance with an ultralow turn-on voltage of 2.4 V and a maximum EQE of14.1%.These results indicate the great potential of the donorspacer-acceptor structure compounds in developing exciplex emitters.

摘要：为促进污水系统提质增效、水环境质量提升、污泥及餐厨垃圾资源化处理处置工作,以摸清本底为基础,以现状问题为导向,以总体规划为龙头,以污染物总量控制为依据,以“流域统筹、区域协调、系统治理、标本兼治”为总体思路,遵循“一个城镇、一个主体、一种模式”原则,开展了九江市中心城区水环境系统综合治理二期PPP项目建设和运营。该项目总投资为56.85亿元,污染物控制及水环境治理取得显著成效,构建了厂网河(湖)岸一体、泥水并重、资源能源回收、建设养护全周期等水环境综合治理新模式,有利于共抓长江大保护事业顺利推进。

摘要：目的运用JMP软件的试验设计对甲钴胺片处方进行研究。方法采用粉末直压工艺,通过试验设计筛选辅料种类、型号及用量,以流动性、含量均匀度、溶出度为指标,确定最佳处方组成。结果试验设计所得处方简单,预测结果与实测结果相似,流动性较好,含量均匀度达到《中国药典》2015年版四部要求,溶出与参比制剂相似。结论通过JMP软件的试验设计进行处方研究简单方便,最终得出的处方组成有望应用于工业化生产。

摘要：僵尸网络是目前互联网安全领域最严重的威胁之一,与传统的IRC僵尸网络相比,树状僵尸网络有其实现起来相对简单的特点,因而现今在网络上开始迅猛流行起来.本文简要介绍了传统僵尸网络的防御方法,给出了一级控制的树状僵尸网络的网络拓扑图,在此基础上提出了一种基于树状的僵尸网络的检测方案,包括其设计思路、规则库的建立,给出了本方案的创新点.事实证明,本方案对准确定位僵尸网络及找到其幕后控制者可以起到良好的效果.

摘要：The problems associated with vibrations of viaducts and low-frequency structural noise radiation caused by train excitation continue to increase in importance.A new floating-slab track vibration isolator-non-obstructive particle damping-phononic crystal vibration isolator is proposed herein,which uses the particle damping vibration absorption technology and bandgap vibration control *** vibration reduction performance of the NOPD-PCVI was analyzed from the perspective of vibration *** paper explores the structure-borne noise reduction performance of the NOPD-PCVIs installed on different bridge structures under varying service conditions encountered in practical engineering *** load transferred to the bridge is obtained from a coupled train-FST-bridge analytical model considering the different structural parameters of *** vibration responses are obtained using the finite element method,while the structural noise radiation is simulated using the frequency-domain boundary element *** the particle swarm optimization algorithm,the parameters of the NOPD-PCVI are optimized so that its frequency bandgap matches the dominant bridge structural noise frequency *** noise reduction performance of the NOPD-PCVIs is compared to the steel-spring isolation under different service conditions.

摘要：建立了某液体火箭发动机系统设计的仿真模型与相应的多目标优化模型,编制了系统仿真程序,并在iSIGHT的软件平台上针对不同的优化目标对发动机的设计参数进行优化.采用了组合优化策略,结合多岛遗传算法和序列二次规划算法分别进行全局寻优和局部寻优,求得全局最优点.建立了单燃气发生器循环系统的质量模型,在优化过程中考虑了发动机主要部件结构质量对系统性能的影响。以燃烧室压强、混合比和喷管出口反压为设计变量,优化目标包括发动机比冲、有效载荷、结构质量、密度比冲、关机时飞行速度、推进剂综合密度.并根据结果分析了燃烧室压强和混合比对发动机性能的影响.

摘要：用两种多目标优化方法对某型液体火箭发动机氧化剂泵叶轮进行多目标优化设计.在优化过程中,以泵的扬程、效率和泵质量为优化目标,对叶轮的主要几何参数进行优化.用NCGA(Neighborhood Culti-vation Genetic Algorithm)方法得到优化问题的Pareto前沿;用超传递近似法得到分目标的最佳权值,进而采用评价函数法求出优化问题的最佳设计值.并分析了主要结构参数对泵性能参数的影响.

摘要：超燃冲压发动机进气道通常都是针对某一特定的马赫数进行设计的,当飞行马赫数不在设计马赫数时发动机性能急剧降低,磁控进气道的应用很有可能解决这一技术难题.对磁控进气道内的流动情况进行了二维数值模拟.飞行马赫数大于设计马赫数时采用磁控进气道可以调整激波位置使激波回到设计点,并减小燃烧室入口处的马赫数.分析了霍尔效应对磁控进气道性能的影响,结果表明分段电极可以有效减小霍尔效应的不利影响.

摘要：The Xi'an Proton Application Facility(XiPAF)is a facility dedicated to the experimental simulation of the space radiation *** facility uses a compact synchrotron as its final-stage *** synchrotron can accelerate a proton beam from 7 to 230 *** design results show that the radio frequency(RF) acceleration system should work in the frequency range of 1—6 MHz and provide a maximum voltage of >800 *** dilute the strong space charge effect during the injection period,we also aim to achieve multiharmonic acceleration.A compact RF acceleration system loaded with magnetic alloy cores has been designed and developed to fulfill these *** preliminary test results show that the system can work normally with a gap voltage of 800 *** a further RF power upgrade,the voltage can be improved to >1:2 kV.