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Stimulated Brillouin interaction between guided phonons and photons in a lithium niobate waveguide

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 173-175页

作者： yuan-Hao Yang Jia-Qi Wang zheng-Xu Zhu Xin-Biao Xu Qiang Zhang Juanjuan Lu Yu Zeng Chun-Hua Dong Luyan Sun Guang-Can Guo Chang-Ling Zou CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China School of Information Science and Technology ShanghaiTech UniversityShanghai 201210China Center for Quantum Information Institute for Interdisciplinary Information SciencesTsinghua UniversityBeijing 100084China

The Brillouin scattering is one of the strongest nonlinear optical effects in dielectrics[1].In particular,the backward Brillouin scattering(BBS)provides an efficient method to achieve low-noise optical gain for active photonics[2]and the coherent interconnects between 10 GHz phonons and photons[3].However,previous studies on BBS are primarily limited to the unconfined phonons[1]or phonon confined in suspended structures[4-6].

关键词： scattering waveguide Brillouin

Characteristics of High-Pressure Spray of a Gasoline Direct Injection Injector Under Non-Flash Boiling and Flash Boiling Conditions

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Journal of Shanghai Jiaotong university(Science) 2024年第2期29卷 230-236页

作者：王森徐宏昌李雪松袁志远 National Engineering Laboratory for Automotive Electronic Control Technology School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China

The increasingly stringent emission regulations and fuel consumption requirements have elevated the demands of internal combustion engines with higher fuel efficiency and lower *** has been widely demonstrated that fash boiling spray can generate shorter and wider spray with improved atomization and evaporation to promote a better air-fuel mixing *** this study,macroscopic(far-field)spray morphologies and primary breakup(near-field)characteristics of a two-hole gasoline direct injection injector are investigated under non-flash boiling and flash boiling *** speed macroscopic and microscopic imaging was used to capture the overall spray structure and near-field characteristics,respectively.N-Hexane is used as the test fuel with the injection pressure ranging from 10 MPa up to 40 *** sub-cooled liquid fuel sprays,increasing fuel pressure contributes to enhanced fuel atomization and *** collapses occurred under fare flash boiling conditions,and higher injection pressure weakened this phenomenon since the spray cone angle decreased due to a higher injection velocity.

关键词： fash boiling atomization high-pressure injection internal combustion engines optical diagnostics

Challenges and opportunities in Quaternary palynology

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Science China Earth Sciences 2024年第7期67卷 2148-2161页

作者： Qinghai XU Houyuan LU Zhuo zheng College of Geographical Sciences Hebei Key Laboratory of Environmental Change and Ecological ConstructionHebei Normal UniversityShijiazhuang 050024China Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Earth Sciences and Engineering Sun Yat-sen UniversityZhuhai 519082China

Quaternary palynology plays a pivotal role in investigating global climate change and various other research fields,serving as an essential tool for the quantitative analysis of paleoenvironment ***,due to the vast diversity of terrestrial ecosystems and intricate interactions between vegetation,climate,and human activities,further advancements are required in the following aspects within this discipline.(1)The accuracy of classification in pollen morphology and fossil pollen identification needs improvement,particularly at the species *** represents a significant challenge in present Quaternary ***-aided intelligent recognition holds promise as a solution for species identification based on more detail pollen morphology.(2)Most pollen-based vegetation and climate reconstructions overlook the significance of bare *** bare ground can lead to substantial inaccuracies when quantitatively reconstructing past vegetation and climate.(3)While pollen records provide reliable information on paleoclimate changes,current quantitative climate reconstruction models heavily rely on modern pollen datasets derived from present-day vegetation disturbed more or less by human *** introduces bias and uncertainties into paleoclimate reconstruction.(4)Although pollen can serve as an indicator of human activities,accurately quantifying the intensity of human influence remains *** accurate identification of crop pollen,reconstructing reliable land cover/use data,and integrating multidisciplinary data may enhance the identification and quantification of signals related to human activity in pollen records.

关键词： Quaternary palynology Paleoclimate Paleovegetation Human activity

A Stable Copper-based Metal-Azolate Framework for Efficient Electroreduction of CO_(2)to C_(2+)Products

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Chemical Research in Chinese Universities 2024年第4期40卷 664-669页

作者： LIU yuan-yuan ZHU Hao-Lin LIAO Pei-Qin CHEN Xiao-Ming Key Laboratory of Bioinorganic and Synthetic Chemistry Ministry of EducationGBRCE for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-sen UniversityGuangzhou510275P.R.China Chemistry and Chemical Engineering Guangdong Laboratory Shantou515031P.R.China

Driven by renewable or excess electrical energy,electrochemical CO_(2)reduction reaction(eCO_(2)RR)represents a promising carbon-neutral approach to generating valuable low-carbon fuels by consuming CO_(2)and H_(2)O.C_(2+)products are one of the most economically valuable products among the reduction species of eCO_(2)RR,but there are still some challenges,such as low selectivity or low current *** this work,we showed that a copper-based metal-azolate framework(MAF),denoted as MAF-203,exhibits the high performance of eCO_(2)RR to yield C_(2+)products with the Faradaic efficiency(C_(2+))of 52.5%and a current density of 660 mA/cm^(2)at-1.2 V *** in a flow cell device under alkaline *** experiment,in situ infrared spectroscopy and the density functional theory(DFT)calculations showed that the electron donating effect of methyl substituents on organic ligands of the copper-based MAF could enhance the ligand field and activation of key intermediates(*CO and*CHO species),thus promoting the coupling of*CO and*CHO for yielding C_(2+)products.

关键词： Metal-organic framework Carbon dioxide Electroreduction C_(2+)product Metal-azolate framework

Human immunodeficiency virus-associated dementia complex with positive 14-3-3 protein in cerebrospinal fluid:A case report

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World Journal of Clinical Cases 2024年第12期12卷 2065-2073页

作者： Yun-sen He Xiao-Hong Qin Min Feng Qin-Jiang Huang Meng-Jun Zhang Li-Li Guo Ming-Bin Bao Ye Tao Hong-yuan Dai Bo Wu Department of Neurosurgery Sichuan Lansheng Brain Hospital&Shanghai Lansheng Brain Hospital Investment Co.Ltd.Chengdu 610036Sichuan ProvinceChina Department of Psychiatry Sichuan Provincial Center for Mental HealthChengdu 610072Sichuan ProvinceChina Department of Geriatrics Municipal People’s Hospital in LuzhouLuzhou 646000Sichuan ProvinceChina Department of Neurosurgery Wenjiang District People’s Hospital of ChengduChengdu 611100Sichuan ProvinceChina Department of Neurosurgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of China ChengduChengdu 610072Sichuan ProvinceChina Department of Neurology Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengdu 610072Sichuan ProvinceChina

BACKGROUND Human immunodeficiency virus(HIV)-associated dementia(HAD)is a subcortical form of dementia characterized by memory deficits and psychomotor ***,HAD often presents with symptoms similar to those of Creutzfeldt-Jakob disease(CJD),particularly in patients with acquired immune deficiency syndrome(AIDS).CASE SUMMARY We report the case of a 54-year-old male who exhibited cognitive dysfunction and secondary behavioral changes following HIV infection and suspected prion *** patient was diagnosed with HIV during hospitalization and his cerebrospinal fluid tested positive for 14-3-3 *** electroencephalogram showed a borderline-abnormal periodic triphasic wave ***-enhanced magnetic resonance imaging revealed moderate encephalatrophy and ***,symptomatic treatment and administration of amantadine were pursued for presumed CJD,but the patient’s condition continued to *** contrast,the patient’s condition improved following anti-HIV *** individual is also the only patient with this prognosis to have survived over 4 ***,the diagnosis was revised to *** In the diagnostic process of rapidly progressive dementia,it is crucial to rule out as many potential causes as possible and to consider an autopsy to diminish diagnostic *** 14-3-3 protein should not be regarded as the definitive marker for *** laboratory screening for infectious diseases is essential to enhance diagnostic precision,especially in AIDS patients with potential ***,a trial of diagnostic treatment may be considered when additional testing is not feasible.

关键词： HIV-associated dementia Cognitive dysfunction Creutzfeld-Jakob disease Rapidly progressive dementia Case report

Characterization of acute-on-chronic liver diseases: A multicenter prospective cohort study

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World Journal of Hepatology 2024年第5期16卷 809-821页

作者： yuan-Yao Zhang sen Luo Hai Li Shu-Ning Sun Xian-Bo Wang Xin zheng Yan Huang Bei-Ling Li Yan-Hang Gao Zhi-Ping Qian Feng Liu Xiao-Bo Lu Jun-Ping Liu Hao-Tang Ren Yu-Bao zheng Hua-Dong Yan Guo-Hong Deng Liang Qiao Yan Zhang Wen-Yi Gu Xiao-Mei Xiang Yi Zhou Yi-Xin Hou Qun Zhang Yan Xiong Cong-Cong Zou Jun Chen Ze-Bing Huang Xiu-Hua Jiang Ting-Ting Qi yuan-yuan Chen Na Gao Chun-Yan Liu Wei yuan Xue Mei Jing Li Tao Li Rong-Jiong zheng Xin-Yi Zhou Jun Zhao Zhong-Ji Meng Department of Infectious Disease Institute of Biomedical ResearchRegulatory Mechanism and Targeted Therapy for Liver Cancer Shiyan Key LaboratoryHubei provincial Clinical Research Center for Precise Diagnosis and Treatment of Liver CancerTaihe HospitalHubei University of MedicineShiyan 442000Hubei ProvinceChina Department of Gastroenterology Renji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200120China Department of Infectious Diseases Southwest HospitalThe Third Military Medical University(Army Medical University)Chongqing 400000China Center of Integrative Medicine Beijing Ditan HospitalCapital Medical UniversityBeijing 100020China Department of Infectious Diseases Institute of Infection and ImmunologyUnion HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430020Hubei ProvinceChina Department of Infectious Diseases Hunan Key Laboratory of Viral HepatitisXiangya HospitalCentral South UniversityChangsha 110051Hunan ProvinceChina Hepatology Unit Department of Infectious DiseasesNanfang HospitalSouthern Medical UniversityGuangzhou 510515Guangdong ProvinceChina Department of Hepatology The First Hospital of Jilin UniversityChangchun 130021Jilin ProvinceChina Department of Liver Intensive Care Unit Shanghai Public Health Clinical CentreFudan UniversityShanghai 200093China Tianjin Institute of Hepatology Nankai University Second People's HospitalTianjin 300192China Infectious Disease Center The First Affiliated Hospital of Xinjiang Medical UniversityUrumqi 830054Xinjiang Uygur Autonomous RegionChina Department of Infectious Diseases and Hepatology The Second Hospital of Shandong UniversityJinan 250000Shandong ProvinceChina State Key Laboratory for Diagnosis and Treatment of Infectious Diseases Collaborative Innovation Center for Diagnosis and Treatment of Infectious DiseaseThe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310000Zhejiang ProvinceChina Department of Infectious Diseases The Thir

BACKGROUND Acute-on-chronic liver disease(AoCLD)accounts for the majority of patients hospitalized in the Department of Hepatology or Infectious *** To explore the characterization of AoCLD to provide theoretical guidance for the accurate diagnosis and prognosis of *** Patients with AoCLD from the Chinese Acute-on-Chronic Liver Failure(ACLF)study cohort were included in this *** clinical characteristics and outcomes,and the 90-d survival rate associated with each clinical type of AoCLD were analyzed,using the Kaplan-Meier method and the log-rank *** A total of 3375 patients with AoCLD were enrolled,including 1679(49.7%)patients with liver cirrhosis acute decompensation(LC-AD),850(25.2%)patients with ACLF,577(17.1%)patients with chronic hepatitis acute exacer-bation(CHAE),and 269(8.0%)patients with liver cirrhosis active phase(LC-A).The most common cause of chronic liver disease(CLD)was HBV infection(71.4%).The most common precipitants of AoCLD was bacterial infection(22.8%).The 90-d mortality rates of each clinical subtype of AoCLD were 43.4%(232/535)for type-C ACLF,36.0%(36/100)for type-B ACLF,27.0%(58/215)for type-A ACLF,9.0%(151/1679)for LC-AD,3.0%(8/269)for LC-A,and 1.2%(7/577)for *** HBV infection is the main cause of CLD,and bacterial infection is the main precipitant of *** most common clinical type of AoCLD is *** diagnosis and timely intervention are needed to reduce the mortality of patients with LC-AD or ACLF.

关键词： Acute-on-chronic liver disease Acute-on-chronic liver failure Liver cirrhosis Clinical features Prognosis

电碳市场背景下典型环境权益产品衔接互认机制及关键技术

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中国电机工程学报 2024年第7期44卷 2558-2577,I0005页

作者：尚楠陈政冷媛南方电网能源发展研究院有限责任公司广东省广州市510663

“碳达峰、碳中和”目标下,我国电力市场、碳市场、绿证市场等在产品属性、价格形成、治理监管等方面的联系日益密切,推动电碳市场背景下典型环境权益产品的联通互认,是推动实现不同市场体系之间充分融合、协同发展的关键桥梁和有力抓... 详细信息

“碳达峰、碳中和”目标下,我国电力市场、碳市场、绿证市场等在产品属性、价格形成、治理监管等方面的联系日益密切,推动电碳市场背景下典型环境权益产品的联通互认,是推动实现不同市场体系之间充分融合、协同发展的关键桥梁和有力抓手。目前,国内电碳环境权益产品尚未形成规范统一的概念定义,暂未出现电碳环境权益产品衔接互认的成熟案例,亦较为缺少密切相关的政策与市场机制设计。该文通过归纳分析国内外主流电碳环境权益产品特点及衔接互认经验,结合我国电力市场、碳市场等市场建设发展现状,剖析当前绿色电力证书、绿色电力消费、非水可再生能源(电力)消纳量、碳排放权、自愿减排量(Chinese certified emission reduction,CCER)等不同类型环境权益产品衔接互认过程中存在的碳排放量核算不准确、减排量重复认证、CCER申领范围不清晰等问题。该文在分析论述已有方案的同时,研究提出一种电碳市场背景下的不同类型环境权益产品的衔接互认体系,包括绿色电力消费与碳排放量的衔接、绿证或非水可再生能源(电力)消纳量与碳排放量的衔接、绿证与CCER的衔接等,并阐述支撑电碳环境权益产品衔接的4大类关键技术,为推动电、碳、绿证等多市场体系之间的协同发展提供决策参考。

关键词：电碳市场环境权益产品衔接互认机制碳排放量绿色电力消费碳排放因子

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β-Receptor blocker enhances the anabolic effect of PTH after osteoporotic fracture

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Bone Research 2024年第2期12卷 302-313页

作者： Jie Huang Tong Wu Yi-Rong Jiang Xuan-Qi zheng Huan Wang Hao Liu Hong Wang Hui-Jie Leng Dong-Wei Fan Wan-Qiong yuan Chun-Li Song Department of Orthopedics Peking University Third Hospital100191 BeijingChina Beijing Key Laboratory of Spinal Disease 100191 BeijingChina Engineering Research Center of Bone and Joint Precision Medicine 100191 BeijingChina

The autonomic nervous system plays a crucial role in regulating bone metabolism,with sympathetic activation stimulating bone resorption and inhibiting bone *** found that fractures lead to increased sympathetic tone,enhanced osteoclast resorption,decreased osteoblast formation,and thus hastened systemic bone loss in ovariectomized(OVX)***,the combined administration of parathyroid hormone(PTH)and theβ-receptor blocker propranolol dramatically promoted systemic bone formation and osteoporotic fracture healing in OVX *** effect of this treatment is superior to that of treatment with PTH or propranolol *** vitro,the sympathetic neurotransmitter norepinephrine(NE)suppressed PTH-induced osteoblast differentiation and mineralization,which was rescued by ***,NE decreased the PTH-induced expression of Runx2 but enhanced the expression of Rankl and the effect of PTH-stimulated osteoblasts on osteoclastic differentiation,whereas these effects were reversed by ***,PTH increased the expression of the circadian clock gene Bmal1,which was inhibited by NE-βAR ***1 knockdown blocked the rescue effect of propranolol on the NE-induced decrease in PTHstimulated osteoblast *** together,these results suggest that propranolol enhances the anabolic effect of PTH in preventing systemic bone loss following osteoporotic fracture by blocking the negative effects of sympathetic signaling on PTH anabolism.

关键词： blocker metabolism inhibited

非国有董事治理是为了追求眼前利益吗?——来自混改国企分红和关联交易的证据

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经济问题 2024年第1期 113-122页

作者：独正元中北大学经济与管理学院山西太原030027

以2013—2022年沪深A股混改国有上市公司为研究样本,从非国有股东委派董事及其投票行为两方面刻画非国有董事治理,借助检验非国有董事治理对混改国企分红和关联交易的影响,考察非国有董事治理是否存在追求眼前利益现象,并在异质性分析... 详细信息

以2013—2022年沪深A股混改国有上市公司为研究样本,从非国有股东委派董事及其投票行为两方面刻画非国有董事治理,借助检验非国有董事治理对混改国企分红和关联交易的影响,考察非国有董事治理是否存在追求眼前利益现象,并在异质性分析基础上进一步探寻缓解措施。研究发现,非国有董事治理与混改国企分红水平和关联交易水平正相关,即非国有董事治理存在追求眼前利益现象;异质性分析发现,该现象在政府放权意愿低和环境不确定性高的条件下更显著;进一步探寻缓解措施发现,提高投资者保护水平、提高非国有股东股权和控制权对等度能够有效缓解非国有董事治理存在的追求眼前利益现象。研究结果对政府完善国企混改顶层设计、国有企业科学制定和实施混改方案具有重要启示意义。

关键词：非国有董事治理国企混改分红关联交易