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Chinese Journal of Chemistry 2011年第9期29卷 1961-1968页

作者： hu, lihua shi, wenfang Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China Hefei Anhui 230026 China

The UV-cured organic-inorganic hybrid nanocomposite （nano-Si-m-PI） was prepared through the photopolymeri- zation of acrylic resin initiated by ethoxysilane-modified multifunctional oligomeric photoinitiator （Si-m-PI）. The es- terification reaction of 2-hydroxy-4＇-（2-hydroxyethoxy）-2-methylpropiophenone （Irgacure 2959） with thioglycolic acid, and the following addition reactions with dipentaerythritol hexaacrylate and then 3-aminopropyltriethoxysilane were carried out for preparing the Si-m-PI. The Si-m-PI exhibits the similar UV absorption and molar extinction coefficient with Irgacure 2959. The photoinitiating activity study by photo-DSC analysis showed that the Si-m-PI possesses high photopolymerization rate at the peak maximum （Rpax） and final unsaturation conversion （Pf） in the cured hybrid films. From the scanning electron microscope （SEM） observation, the SiO2 nanoparticles dispersed uniformly in the formed nano-Si-m-PI, whereas the aggregation of nanoparticals occurred in nano-Irg, which was prepared through the photopolymerization of acrylic resin initiated by Irgacure 2959. Moreover, compared with the UV-cured pure polymer and nano-Irg, the nano-Si-m-PI showed remarkably enhanced thermal stability and mechanical properties.

关键词： polymer-matrix composites sol-gel process mechanical property UV-curing

Inkjet-Printing Controlled Phase Evolution Boosts the Efficiency of Hole Transport Material Free and Carbon-Based CsPbBr_(3) Perovskite Solar Cells Exceeding 9%

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Energy & Environmental Materials 2024年第2期7卷 209-220页

作者： lihua Zhang shi Chen Jie Zeng Zhengyan Jiang Qian Ai Xianfu Zhang Bihua hu Xingzhu Wang shihe Yang Baomin Xu Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry The Hong Kong University of Science and TechnologyClear Water BayHong KongChina Henan Key Laboratory of Photovoltaic Materials Henan UniversityKaifeng 475004China Guangdong Key Lab of Nano-Micro Material Research School of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen 518055China Key University Laboratory of Highly Efficient Utilization of Solar Energy and Sustainable Development of Guangdong Southern University of Science and TechnologyShenzhen 518055China Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055China

Hole transport material free carbon-based all-inorganic CsPbBr_(3)perovskite solar cells(PSCs)are promising for commercialization due to its low-cost,high open-circuit voltage(V_(oc))and superior *** to the different solubility of PbBr_(2)and CsBr in conventional solvents,CsPbBr_(3)films are mainly obtained by multi-step spin-coating through the phase evolution from PbBr_(2)to CsPb_(2)Br_(5)and then to CsPbBr_(3).The scalable fabrication of high-quality CsPbBr_(3)films has been rarely ***,an inkjet-printing method is developed to prepare high-quality CsPbBr_(3)*** formation of long-range crystalline CsPb_(2)Br_(5)phase can effectively improve phase purity and promote regular crystal stacking of CsPbBr_(3).Consequently,the inkjet-printed CsPbBr_(3)C-PSCs realized PCEs up to 9.09%,8.59%and 7.81%with active areas of 0.09,0.25,and 1 cm^(2),respectively,demonstrating the upscaling potential of our fabrication method and *** high performance is mainly ascribed to the high purity,strong crystal orientation,reduced surface roughness and lower trap states density of the as-printed CsPbBr_(3)*** work provides insights into the relationship between the phase evolution mechanisms and crystal growth dynamics of cesium lead bromide halide films.

关键词： all-inorganic perovskite solar cells CsPbBr_(3) inkjet-printing phase evolution

Ultra reliability and massive connectivity provision in integrated internet of military things(IoMT)based on tactical datalink

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Defence Technology（防务技术） 2024年第3期33卷 386-398页

作者： Li Bing Yating Gu Lanke hu Li Bowen Yang lihua Jue Wang Yue Yin Northwestern Polytechnical University Xi'an 710072China China Academy of Information and Communications Technology Beijing 100191China China Intelligent and Connected Vehicles(Beijing)Research Institute Co. LtdBeijing 100176China The 20th Research Institute of China Electronic Technology Group Corporation Xi’an 710068China Xidian University Xi'an 710071China

One of the major challenges arising in internet of military things(IoMT)is accommodating massive connectivity while providing guaranteed quality of service(QoS)in terms of ultra-high *** this regard,this paper presents a class of code-domain nonorthogonal multiple accesses(NOMAs)for uplink ultra reliable networking of massive IoMT based on tactical datalink such as Link-16 and joint tactical information distribution system(JTIDS).In the considered scenario,a satellite equipped with Nr antennas servers K devices including vehicles,drones,ships,sensors,handset radios,*** coded modulation,a special form of multiple input multiple output(MIMO)-NOMA is *** discussion starts with evaluating the output signal to interference-plus-noise(SINR)of receiver filter,leading to the unveiling of a closed-form expression for overloading systems as the number of users is significantly larger than the number of devices admitted such that massive connectivity is *** expression allows for the development of simple yet successful interference suppression based on power allocation and phase shaping techniques that maximizes the sum rate since it is equivalent to fixed-point programming as can be *** proposed design is exemplified by nonlinear modulation schemes such as minimum shift keying(MSK)and Gaussian MSK(GMSK),two pivotal modulation formats in IoMT standards such as Link-16 and *** results show that near capacity performance is ***,the performance is obtained using simple forward error corrections(FECs)of higher coding rate than existing schemes do,while the transmit power is reduced by 6 *** proposed design finds wide applications not only in IoMT but also in deep space communications,where ultra reliability and massive connectivity is a keen concern.

关键词： Satellite network Deep space communications Internet of military things Non-orthogonal multiple access MIMO Link-16 JITDS

Predicting stability of integrated circuit test equipment using upper side boundary values of normal distribution

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The Journal of China Universities of Posts and Telecommunications 2024年第2期31卷 85-93页

作者： Zhan Wenfa hu Xinyi Zheng Jiangyun Yu Chuxian Cai Xueyuan Zhang lihua School of Electronic Engineering and Intelligent Manufacturing Anqing Normal UniversityAnqing 246133China School of Computer and Information Technology Anqing Normal UniversityAnqing 246133China

In response to the growing complexity and performance of integrated circuit(IC),there is an urgent need to enhance the testing and stability of IC test equipment.A method was proposed to predict equipment stability using the upper side boundary value of normal ***,the K-means clustering algorithm classifies and analyzes sample *** accuracy of this boundary value is compared under two common confidence levels to select the optimal threshold.A range is then defined to categorize unqualified test *** experimental verification,the method achieves the purpose of measuring the stability of qualitative IC equipment through a deterministic threshold value and judging the stability of the equipment by comparing the number of unqualified data with the threshold value,which realizes the goal of long-term operation monitoring and stability analysis of IC test equipment.

关键词： K-means clustering algorithm the upper side boundary of normal distribution threshold integrated circuit(IC)test equipment stability analysis

Three-dimensional limit variation analysis on the ultimate pullout capacity of the anchor cables based on the Hoek-Brown failure criterion

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Journal of Mountain Science 2024年第3期21卷 1036-1047页

作者： ZUO shi ZHAO Lianheng hu shihong College of Civil Engineering Changsha UniversityChangsha 410022China hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structure Key Laboratory of Heavy-Haul Railway Engineering StructureMinistry of EducationCentral South UniversityChangsha 410075China College of Civil Engineering Central South UniversityChangsha 410075China

Only simplified two-dimensional model and a single failure mode are adopted to calculate the ultimate pullout capacity(UPC)of anchor cables in most previous *** study focuses on a more comprehensive combination failure mode that consists of bond failure of an anchorage body and failure of an anchored rock *** three-dimensional ultimate pullout capacity of the anchor cables is calculated based on the Hoek-Brown failure criterion and variation analysis *** numerical solution for the curvilinear function in fracture plane is obtained based on the finite difference theory,which more accurately reflects the failure state of the anchor cable,as opposed to that being assumed in *** results reveal that relying solely on a single failure mode for UPC calculations has limitations,as changes in parameter values not only directly impact the UPC value but also can alter the failure model and thus the calculation method.

关键词： Anchor cable Ultimate pullout capacity(UPC) Failure model Variation analysis Hoek-Brown failure criterion

[H_(2)dab][GaB_(5)O_(10)]:an Acentric Galloborate with a 4-Connected Uninodal Framework

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Chemical Research in Chinese Universities 2024年第4期40卷 747-752页

作者： LIU wenfang CHEN Chongan YANG Guoyu School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing102488P.R.China

A new acentric galloborate(GBO)[H_(2)dab][GaB_(5)O_(10)](1,1,4-dab:1,4-diaminobutane)has been synthesized under solvothermal *** alternation of 4,4-connected GaO4 and B5O10 cluster build up the 3D[GaB_(5)O_(10)]_(n)^(2n-)uninodal framework,which contains three pairs of helical channels with 8-member ring(MR)and 7-MR apertures,*** 1 exhibits a moderate second harmonic generation(SHG)response of 1.8 times that of KH_(2)PO_(4)(KDP),indicating its potential application in UV *** acentric uninodal framework in compound 1 represents a new type of zeolitic framework in the GBOs’family.

关键词： Galloborate Solvothermal synthesis Nonlinear optics Zeolitic framework

The role of bile acids in human aging

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Medical Review 2024年第2期4卷 154-157页

作者： lihua Jin Linsen shi Wendong huang Department of Diabetes Complications and Metabolism Arthur Riggs Diabetes and Metabolism Research InstituteBeckman Research InstituteCity of Hope National Medical Center1500 E.Duarte RoadDuarteCA 91010USA Department of Diabetes Complications and Metabolism Arthur Riggs Diabetes and Metabolism Research InstituteBeckman Research InstituteCity of Hope National Medical CenterDuarteCAUSA Irell&Manella Graduate School of Biomedical Science City of Hope National Medical Center1500 E.Duarte RoadDuarteCA 91010USA

Bile acids are recognized as important signaling molecules that enable fine-tuned inter-communication from the liver,through the intestine,to virtually any organ,thus encouraging their pleiotropic physiological *** is a complex natural process defined as a progressive decline in cellular and organismal functions.A causal link between bile acids and the aging process is ***,there are gaps in our understanding of the molecular mechanisms and precise targets responsible for the alteration of bile acid profiles and their role in the aging *** barrier dysfunction leads to endotoxemia,systemic inflammation,insulin resistance,diabetes,lipid accumulation,obesity and fatty liver diseases,and health decline and *** fact,intestinal barrier dysfunction is suggested to be an evolutionarily conserved hallmark of *** acids may modulate the aging process by regulating intestinal barrier integrity.

关键词： age bile acid gut microbiota enterohepatic circulation intestinal barrier

An infinite-dimensional representation of the Ray-Knight theorems

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Science China Mathematics 2024年第1期67卷 149-162页

作者： Elie Aidékon Yueyun hu Zhan shi School of Mathematical Sciences Fudan UniversityShanghai 200433China LAGA UniversitéSorbonne Paris NordVilletaneuse 93430France Institute of Applied Mathematics Academy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China

The classical Ray-Knight theorems for the Brownian motion determine the law of its local time process either at the first hitting time of a given value a by the local time at the origin,or at the first hitting time of a given position b by the Brownian *** extend these results by describing the local time process jointly for all a and b,by means of the stochastic integral with respect to an appropriate white *** result applies toμ-processes,and has an immediate application:aμ-process is the height process of a Feller continuous-state branching process(CSBP)with immigration(Lambert(2002)),whereas a Feller CSBP with immigration satisfies a stochastic differential equation(SDE)driven by a white noise(Dawson and Li(2012));our result gives an explicit relation between these two descriptions and shows that the SDE in question is a reformulation of Tanaka’s formula.

关键词： Ray-Knight theorem μ-process white noise Tanaka's formula

Emergence of SARS and COVID-19 and preparedness for the next emerging disease X

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Frontiers of Medicine 2024年第1期18卷 1-18页

作者： Ben hu hua Guo Haorui Si Zhengli shi CAS Key Laboratory of Special Pathogens and Biosafety Wuhan Institute of VirologyChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China

Severe acute respiratory syndrome(SARS)and Coronavirus disease 2019(COVID-19)are two human Coronavirus diseases emerging in this century,posing tremendous threats to public health and causing great loss to lives and *** this review,we retrospect the studies tracing the molecular evolution of SARS-CoV,and we sort out current research findings about the potential ancestor of *** knowledge about SARS-CoV-2-like viruses found in wildlife,the animal susceptibility to SARS-CoV-2,as well as the interspecies transmission risk of SARS-related coronaviruses(SARSr-CoVs)are gathered ***,we discuss the strategies of how to be prepared against future outbreaks of emerging or re-emerging coronaviruses.

关键词： SARS COVID-19 coronavirus

Reduced-complexity multiple parameters estimation via toeplitz matrix triple iteration reconstruction with bistatic MIMO radar

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Chinese Journal of Aeronautics 2024年第7期37卷 482-495页

作者： Chenghong ZHAN Guoping hu Junpeng shi Fangzheng ZHAO Hao ZHOU Graduate College Air Force Engineering UniversityXi’an 710051China Air and Missile Defense College Air Force Engineering UniversityXi’an 710051China College of Electronic Countermeasure National University of Defense TechnologyHefei 230037China Beijing Aeronautical Technology Research Center Beijing 100076China

In this advanced exploration, we focus on multiple parameters estimation in bistatic Multiple-Input Multiple-Output(MIMO) radar systems, a crucial technique for target localization and imaging. Our research innovatively addresses the joint estimation of the Direction of Departure(DOD), Direction of Arrival(DOA), and Doppler frequency for incoherent targets. We propose a novel approach that significantly reduces computational complexity by utilizing the TemporalSpatial Nested Sampling Model(TSNSM). Our methodology begins with a multi-linear mapping mechanism to efficiently eliminate unnecessary virtual Degrees of Freedom(DOFs) and reorganize the remaining ones. We then employ the Toeplitz matrix triple iteration reconstruction method, surpassing the traditional Temporal-Spatial Smoothing Window(TSSW) approach, to mitigate the single snapshot effect and reduce computational demands. We further refine the highdimensional ESPRIT algorithm for joint estimation of DOD, DOA, and Doppler frequency, eliminating the need for additional parameter pairing. Moreover, we meticulously derive the Cramér-Rao Bound(CRB) for the TSNSM. This signal model allows for a second expansion of DOFs in time and space domains, achieving high precision in target angle and Doppler frequency estimation with low computational complexity. Our adaptable algorithm is validated through simulations and is suitable for sparse array MIMO radars with various structures, ensuring higher precision in parameter estimation with less complexity burden.

关键词： MIMO Radar Multipleparameters estimation Temporal-spatial Nested Sampling Multi-linear mapping mechanism Toeplitz matrix triple iteration reconstruction Reduce computational complexity