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有机金属卤化物钙钛矿CH_(3)NH_(3)PbBr_(3)的各向异性Rashba效应

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原子与分子物理学报 2025年第6期42卷 153-158页

作者：蔡锦鸿余达明周贤中广东工业大学集成电路学院广州510006

本研究通过密度泛函理论结合全相对论赝势对钙钛矿CH_(3)NH_(3)PbBr_(3)中的各向异性Rashba效应进行了深入研究.发现,Pb-Br八面体的畸变引起了导带最小间隙的三重态在自旋轨道耦合(SOC)效应和晶格形变下的分裂,导致在不同方向上呈现出... 详细信息

本研究通过密度泛函理论结合全相对论赝势对钙钛矿CH_(3)NH_(3)PbBr_(3)中的各向异性Rashba效应进行了深入研究.发现,Pb-Br八面体的畸变引起了导带最小间隙的三重态在自旋轨道耦合(SOC)效应和晶格形变下的分裂,导致在不同方向上呈现出强烈的各向异性.Rashba带分裂的最大系数可达2.0 eV?,并通过分析能级和电荷密度分布解释了Rashba效应的形成机制.这些研究结果有助于深化对CH_(3)NH_(3)PbBr_(3)性质的理解,同时为其在自旋电子学领域的潜在应用提供了理论基础.

关键词：钙钛矿 CH_3NH_3PbBr_3 密度泛函理论自旋轨道耦合

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Discovery of Alkaloid Quinazolone-Derived Imidazolenones with Novel Structural Scaffolds of Multitargeting Antibacterial Potential

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Chinese Journal of Chemistry 2023年第24期41卷 3645-3661页

作者： Jie Dai Narsaiah Battini zhong-lin Zang Yan Luo Cheng-He zhou Institute of Bioorganic & Medicinal Chemistry Key Laboratory of Applied Chemistry of Chongqing MunicipalitySchool of Chemistry and Chemical EngineeringSouthwest UniversityChongqing400715 China College of Pharmacy National & Local Joint Engineering Research Center of Targeted and Innovative TherapeuticsChongqing Key Laboratory of Kinase Modulators as Innovative MedicineChongqing University of Arts and SciencesChongqing402160 China

Alkaloids are one of the prominent members in the development of new antimicrobial *** work discovered a class of alkaloid quinazolone-derived imidazolenones as novel structural type of antibacterial agents with large potential to treat severe bacterial infections in the agricultural and food *** bioactive assay displayed that some of the prepared compounds exhibited good inhibition against the tested strains,and cyclohexylimidazole-derived 7-fluoroquinazolone 22a(MIC=0.002 mmol/L)exhibited a 12.5-fold stronger inhibition than norfloxacin against Escherichia coli ATCC *** studies revealed that compound 22a not only possessed the ability of rapid bactericidal property and low propensity to develop resistance but also showed low cytotoxic effects toward red blood *** preliminary mechanism exploration indicated that compound 22a could cause membrane damage by disrupting bacterial membrane as well as depolarizing the cell ***,compound 22a could insert into DNA,which might hinder the replication of *** docking suggested that compound 22a could bind to gyrase and topoisomerase,which might be due to the suppressed expression of related ***,compound 22a could disorder the metabolism and stimulate the production of reactive oxygen species to affect bacterial *** series of investigations suggested the promise of alkaloid quinazolone-derived imidazolenones as novel multitargeting antibacterial candidates for treatment of bacterial infections.

关键词： Quinazolone Imidazole Antibacterial Enone DNA

Mixed Rescaling Model and Direct Photon Production

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Chinese Physics Letters 1996年第3期13卷 165-167页

作者： lin zhong-jin Department of Physics Xiamen UniversityXiamen 361005 CCAST(World Loboratory) P.O.Box 8730Beijing 100080

Using the mixed rescaling model,the main features of the European Muon Collaboration eifec t can be *** the ratio of cross sections,free proton(p)-bound nucleon of Iron(Fe)to free proton-free proton,for large-P_(T) di... 详细信息

关键词： scaling explained free

Resection of multiple rectal carcinoids with transanal endoscopic microsurgery:Case report

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World Journal of Gastroenterology 2015年第7期21卷 2220-2224页

作者： Jiao-lin zhou Guo-Le lin Da-Chun Zhao Guang-Xi zhong Hui-zhong Qiu Department of General Surgery Peking Union Medical College Hospital Department of Pathology Peking Union Medical College Hospital Department of Ultrasound Peking Union Medical College Hospital

Multiple rectal carcinoids are *** to the unreliability of endoscopic polypectomy in treating these submucosal lesions,a laparotomy is usually *** present a case report on multiple rectal carcinoids with three carcinoid foci<10 mm in diameter located in the *** examination showed the lesions to be confined to the submucosal layer with no perirectal nodal involvement.A transanal endoscopic microsurgerywas successfully performed to remove the three lesions with accurate full-thickness resection followed by secured suture *** postoperative pathology revealed neuroendocrine tumors G1(carcinoids)located within the submucosal layer without lymphatic or vessel *** the deep and lateral surgical margins were completely free of tumor *** patient recovered quickly and *** tumor recurrence was observed at the six-month *** the multiple small rectal carcinoids without muscularis propria or lymphatic invasion,transanal endoscopic microsurgery offers a reliable and efficient alternative approach to traditional laparotomy for select patients,with the added advantages of minimally invasive surgery.

关键词： Colorectal Gastrointestinal surgery Oncological su

Stochastic Resonance-Like and Resonance Suppression-Like Phenomena in a Bistable System with Time Delay and Additive Noise

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Chinese Physics Letters 2012年第5期29卷 63-66页

作者： SHU Chang-Zheng NIE lin-Ru zhou zhong-Rao Faculty of Science Kunming University of Science and TechnologyKunming 650093

Stochastic resonance (SR)-like and resonance suppression (RS)-like phenomena in a time-delayed bistable system driven by additive white noise are investigated by means of stochastic simulations of the power spectrum,the quality factor of the power spectrum,and the mean first-passage time (MFPT) of the *** cal culative results indicate that:(i) as the system is driven by a small periodic signal,the quality factor as a function delay time exhibits a maximal value at smaller noise intensities,i.e.,an SR-like *** the increment in additive noise inteusity,the extremum gradually disappears and the quality factor decreases monotonously with delay time.(ii) As the additive noise intensity is smaller,the curve of the MFPT with respect to delay time displays a peak,i.e.,an RS-like *** higher levels of noise,however,the non-monotonic behavior is lost.

关键词： additive delay system

Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han Bo Yan Pan Liao Zhenyu Yin Xintong Ge Dai Li Rongrong zhong Qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

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Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

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Journal of Energy Chemistry 2025年第1期100卷 397-408页

作者： Md Ahasan Habib Shusen lin Mehedi Hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon Lee Department of Electronic Engineering College of Electronics and Information Kwangwoon University

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar （SCP）,denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm2in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm2in 1 M KOH,outperforming the standard benchmark electrodes of RuO2||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm2high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2production.

关键词： Potassium hydroxide

Stability of nonlinear feedback shift registers

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Science China(Information Sciences) 2016年第1期59卷 201-212页

作者： Jianghua zhong Dongdai lin State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences Institute of Complexity Science Qingdao University

Convolutional codes have been widely used in many applications such as digital video, radio, and mobile communication. Nonlinear feedback shift registers(NFSRs) are the main building blocks in convolutional decoders. A decoding error may result in a succession of further decoding errors. However, a stable NFSR can limit such an error-propagation. This paper studies the stability of NFSRs using a Boolean network approach. A Boolean network is an autonomous system that evolves as an automaton through Boolean functions. An NFSR can be viewed as a Boolean network. Based on its Boolean network representation, some sufficient and necessary conditions are provided for globally(locally) stable NFSRs. To determine the global stability of an NFSR with its stage greater than 1, the Boolean network approach requires lower time complexity of computations than the exhaustive search and the Lyapunov’s direct method.

关键词： nonlinear feedback shift register stability Boolean function Boolean network semi-tensor product

An aero-engine life-cycle maintenance policy optimization algorithm: Reinforcement learning approach

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Chinese Journal of Aeronautics 2019年第9期32卷 2133-2150页

作者： Zhen LI Shisheng zhong lin lin School of Mechatronics Engineering Harbin Institute of Technology

An aero-engine maintenance policy plays a crucial role in reasonably reducing maintenance cost. An aero-engine is a type of complex equipment with long service-life. In engineering,a hybrid maintenance strategy is adopted to improve the aero-engine operational reliability. Thus,the long service-life and the hybrid maintenance strategy should be considered synchronously in aero-engine maintenance policy optimization. This paper proposes an aero-engine life-cycle maintenance policy optimization algorithm that synchronously considers the long service-life and the hybrid maintenance strategy. The reinforcement learning approach was adopted to illustrate the optimization framework, in which maintenance policy optimization was formulated as a Markov decision process. In the reinforcement learning framework, the Gauss–Seidel value iteration algorithm was adopted to optimize the maintenance policy. Compared with traditional aero-engine maintenance policy optimization methods, the long service-life and the hybrid maintenance strategy could be addressed synchronously by the proposed algorithm. Two numerical experiments and algorithm analyses were performed to illustrate the optimization algorithm in detail.

关键词： Aero-engine Hybrid strategy Maintenance policy Optimization algorithm Reinforcement learning

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