检索结果-南通市图书馆

Electrochemical hydrogen storage performance of AB_(5-)CoB composites synthesized by a simple mixing method

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2009年第6期28卷 629-632页

作者： SONG Dawei WANG Yijing WANG yaping JIAO Lifang yuan Huatang Institute of New Energy Material Chemistry Engineering Research Center of Energy Storage ＆ Conversion （Ministry of Education of China） and Key Laboratory of En-ergy-Material Chemistry （Tianjin） Nankai University Tianjin 300071 China

AB5 （MlNi4.0Al0.3Cu0.5Zn0.2） alloy and CoB alloy were prepared by arc melting. AB5-CoB composites were synthesized by simple mixing of AB5 alloy powders and CoB alloy powders, and their electrochemical hydrogen storage properties were studied as negative electrodes in KOH aqueous solution. The maximum discharge capacity of the AB5-CoB（50%） composite （the content of CoB in the composite is 50 wt.%） reached 365.3 mAh.g^-1. After 100 charge-discharge cycles, the discharge capacity of the AB5-CoB（50%） composite was still much higher than that of the AB5 alloy. The high rate discharge capability （HRD） and potentiodynamic polarization were also tested.

关键词： composite materials powder metallurgy electrochemical techniques electrochemical properties

Extreme single-excitation subradiance from two-band Bloch oscillations in atomic arrays

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2024年第3期12卷 571-580页

作者： LUOJIA WANG DA-WEI WANG LUQI yuan yaping YANG XIANFENG CHEN State Key Laboratory of Advanced Optical Communication Systems and Networks School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Interdisciplinary Center for Quantum Information and State Key Laboratory of Modern Optical Instrumentation Zhejiang Province Key Laboratory of Quantum Technology and Deviceand School of PhysicsZhejiang UniversityHangzhou 310027China MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Science and EngineeringTongji UniversityShanghai 200092China Shanghai Research Center for Quantum Sciences Shanghai 201315China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

Atomic arrays provide an important quantum optical platform with photon-mediated dipole–dipole interactions that can be engineered to realize key applications in quantum information processing.A major obstacle for such applications is the fast decay of the excited *** controlling two-band Bloch oscillations of single excitation in an atomic array under an external magnetic field,here we show that exotic subradiance can be realized and maintained with orders of magnitude longer than the spontaneous decay time in atomic arrays with the finite *** key finding is to show a way for preventing the wavepacket of excited states scattering into the dissipative zone inside the free space light cone,which therefore leads to the excitation staying at a subradiant state for an extremely long decay *** show that such operation can be achieved by introducing a spatially linear potential from the external magnetic field in the atomic arrays and then manipulating interconnected two-band Bloch oscillations along opposite *** results also point out the possibility of controllable switching between superradiant and subradiant states,which leads to potential applications in quantum storage.

关键词： excitation Bloch decay

A model for aircraft cabin evacuation considering passenger type

在线全文

学校读者我要写书评

暂无评论

Journal of Safety Science and Resilience 2024年第1期5卷 83-90页

作者： yaping Ma Jinfeng yuan Lingling Tan Quanyi Liu Mengling Li Civil Aircraft Fire Science and Safety Engineering Key Laboratory of Sichuan Province Civil Aviation Flight University of ChinaGuanghan 618307China School of Safety Science and Emergency Management Wuhan University of TechnologyWuhan 430070China

Pedestrian safety evacuation in aircraft cabins has been a challenging problem because of the aircraft’s unique characteristics,such as the diversity of passengers and the restricted evacuation *** is difficult to reproduce evacuation activities in aircraft cabin due to safety concerns and cost *** fill this gap,an improved cellular automaton model of crowd evacuation for aircraft cabin is established by incorporating the characteristics of cabin space structures and passenger *** are divided into healthy individual passengers and disabled-healthy group passengers,whose movement mechanisms are *** on the constructed model,simulation experiments are conducted using the configuration cabin layout of B737-800 as an *** results show that the evacuation time is prolonged with increased passenger density and the number of disabled ***,the overall evacuation time is insignificantly affected by whether disabled-healthy group passengers’seats are close to the aisle or window,and the evacuation efficiency is best when their seats are evenly distributed in the *** evacuation time is the shortest when all cabin doors are open,and pedestrians are evacuated the slowest when the central emergency doors are *** study pro-vides valuable insights into effective strategies for pedestrian evacuation and crowd emergency management of civil aircraft.

关键词： Aircraft cabin evacuation Passenger type Cellular automaton model Pedestrian distribution Evacuation efficiency

Using endogenous glycogen as relaxation agent for imaging liver metabolism by MRI

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fundamental Research 2023年第4期3卷 481-487页

作者： Shizhen Chen Mou Jiang yaping yuan Baolong Wang Yu Li Lei Zhang Zhong-Xing Jiang Chaohui Ye Xin Zhou State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in WuhanWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China University of Chinese Academy of Sciences Beijing 100049China

Glycogen plays essential roles in glucose *** glycogen in the liver,the major glycogen reservoir in the body,may shed new light on many metabolic disorders.^(13)C magnetic resonance spectroscopy(MRS)has become the mainstream method for monitoring glycogen in the ***,the equipment of special hard-ware to standard clinical magnetic resonance imaging(MRI)scanners limits its clinical ***,we utilized endogenous glycogen as a T_(2)-based relaxation contrast agent for imaging glycogen metabolism in the liver in *** in vitro results demonstrated that the transverse relaxation rate of glycogen strongly correlates with the concentration,pH,and field *** on the Swift-Connick theory,we characterized the exchange property of glycogen and measured the exchange rate of glycogen as 31,847 Hz at 37°***,the viscosity and echo spacing showed no apparent effect on the transverse relaxation *** unique feature enables vi-sualization of glycogen signaling in vivo through T_(2)-weighted *** hours-post intraperitoneal injection of glucagon,a clinical drug to promote glycogenolysis and gluconeogenesis,the signal intensity of the mice’s liver increased by 1.8 times from the T_(2)-weighted imaging experiment due to the decomposition of *** study provides a convenient imaging strategy to non-invasively investigate glycogen metabolism in the liver,which may find clinical applications in metabolic diseases.

关键词： Glycogen Magnetic resonance imaging Liver T2-weighted imaging Transverse relaxation

康替唑胺与利奈唑胺对70岁以上重症院内获得性肺炎患者的疗效比较

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

解放军医学院学报 2024年第3期45卷 239-244,251页

作者：那鹏刘婷婷袁亚平吴炯熇王超方向群朱曼李洪霞解放军医学院北京100853 解放军总医院第二医学中心呼吸与危重症医学科北京100853 解放军总医院医疗保障中心药剂科北京100853

背景康替唑胺作为抗革兰阳性菌的新型药物,其疗效不劣于利奈唑胺,且不良反应的发生情况较利奈唑胺更低,但其在医院获得性肺炎(hospital acquired pneumonia,HAP)领域应用尚少。目的比较康替唑胺治疗利奈唑胺对高龄重症院内获得性肺炎(se... 详细信息

背景康替唑胺作为抗革兰阳性菌的新型药物,其疗效不劣于利奈唑胺,且不良反应的发生情况较利奈唑胺更低,但其在医院获得性肺炎(hospital acquired pneumonia,HAP)领域应用尚少。目的比较康替唑胺治疗利奈唑胺对高龄重症院内获得性肺炎(severe hospital acquired pneumonia,SHAP)患者的疗效及不良反应。方法回顾性分析解放军总医院第二医学中心2021年1月1日—2023年2月15日发生SHAP、年龄≥70岁且在院内接受康替唑胺(800 mg,口服,1次/12 h)或利奈唑胺(600 mg,静滴或口服,1次/12 h)治疗患者的一般资料和临床资料,比较两组临床疗效及不良反应。结果共纳入358例患者。康替唑胺组111例,年龄(92.91±6.93)岁,男性占88.3%(98/111);利奈唑胺组247例,年龄(92.19±6.92)岁,男性占91.9%(227/247)。两组差异无统计学意义(P>0.05)。康替唑胺组与利奈唑胺的临床有效率分别为55.0%(61/111)和61.1%(151/247),差异无统计学意义(P>0.05)。对一般及临床基线指标进行倾向性评分匹配后,康替唑胺组与利奈唑胺组各36例患者,两组间临床有效率(61.1%vs 69.4%,P=0.458)、微生物清除率(22.2%vs 27.8%,P=0.296)差异均无统计学意义。康替唑胺组血小板下降的发生率显著低于利奈唑胺组(50.0%vs 80.6%,P=0.006);康替唑胺组和利奈唑胺组血红蛋白下降发生率分别为41.7%和61.1%,红细胞下降发生率分别为50.0%和61.1%,乳酸升高的发生率分别为44.1%和54.3%,乳酸酸中毒发生率分别为29.4%和34.3%,两组差异均无统计学意义(P>0.05)。结论康替唑胺治疗高龄SHAP的疗效与利奈唑胺相当,但其引起的血小板下降发生率显著低于利奈唑胺。

关键词：康替唑胺利奈唑胺重症院内获得性肺炎血小板下降药物不良反应

Ti_(3)C_(2)T_(x) MXene in-situ transformed Li_(2)TiO_(3) interface layer enabling 4.5 V-LiCoO_(2)/sulfide all-solid-state lithium batteries with superior rate capability and cyclability

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第6期35卷 195-200页

作者： yaping Wang Pengcheng yuan Zeyuan Xu Xiong-Xiong Liu Shengfa Feng Mufan Cao Chen Cao Xiaoqiang Wang Long Pan Zheng-Ming Sun Key Laboratory of Advanced Metallic Materials of Jiangsu Province School of Materials Science and EngineeringSoutheast UniversityNanjing 211189China CALB Technology Co. Ltd.Changzhou 213200China

All-solid-state lithium batteries(ASSLBs)based on sulfide electrolytes promise next-generation energy storage with high energy density and ***,the sulfide electrolytes suffer from phase instability and sluggish interfacial charge transport when pairing with layered oxide cathodes at high ***,a simple and efficient strategy is proposed using two-dimensional Ti_(3)C_(2)T_(x)MXene as starting material to in-situ construct a 15 nm Li_(2)TiO_(3) layer on a typical oxide cathode,LiCoO_(2).The in-situ transformation of Ti_(3)C_(2)T_(x)into Li_(2)TiO_(3) layer occurs at a low temperature of 500℃,avoiding the phase deterioration of LiCoO_(2).The thin Li_(2)TiO_(3) layer is Li^(+)conducting and electrochemically stable,thereby preventing the interfacial decomposition of sulfide electrolytes induced by LiCoO_(2) at high voltages and facilitating Li+transport at the ***,Li_(2)TiO_(3) can stabilize the layer structure of LiCoO_(2) at high ***,the sulfide-based ASSLB using LiCoO_(2)@Li_(2)TiO_(3) cathode can operate stably at a high voltage of up to 4.5 V(***+/Li),delivering an outstanding initial specific discharge capacity of 138.8 m Ah/g with a high capacity retention of 86.2% after 100 cycles at 0.2 *** in-situ transformation strategy may also apply to other MXenes,offering a general approach for constructing other advanced lithiated coatings for oxide cathodes.

关键词： Solid sulfide electrolyte Oxide cathode MXene In-situ transformation Li_(2)TiO_(3) interfacial layer

Expression and clinical significance of pattern recognition receptor-associated genes in hand, foot and mouth disease

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2024年第4期17卷 173-183,I0001-I0003页

作者： Muqi Wang Huiling Deng yuan Chen Yikai Wang Yufeng Zhang Chenrui Liu Meng Zhang Ting Li Shuangsuo Dang yaping Li Department of Infectious Diseases The Second Affiliated Hospital of Xi'an Jiaotong UniversityXi'an 710004China Department of Pediatrics Xi'an Central HospitalXi'an 710004China Department of Infectious Diseases Xi'an Children's HospitalXi'an 710003China

Objective:To explore which pattern recognition receptors(PRRs)play a key role in the development of hand,foot,and mouth disease(HFMD)by analyzing PRR-associated ***:We conducted a comparative analysis of PRR-associated gene expression in human peripheral blood mononuclear cells(PBMCs)infected with enterovirus 71(EV-A71)which were derived from patients with HFMD of different severities and at different stages.A total of 30 PRR-associated genes were identified as significantly upregulated both over time and across different EV-A71 ***,ELISA was employed to quantify the expression of the six most prominent genes among these 30 identified genes,specifically,BST2,IRF7,IFI16,TRIM21,MX1,and ***:Compared with those at the recovery stage,the expression levels of BST2(P=0.027),IFI16(P=0.016),MX1(P=0.046)and DDX58(P=0.008)in the acute stage of infection were significantly upregulated,while no significant difference in the expression levels of IRF7(P=0.495)and TRIM21(P=0.071)was found between different stages of the *** expression levels of BST2,IRF7,IFI16 and MX1 were significantly higher in children infected with single pathogen than those infected with mixed pathogens,and BST2,IRF7,IFI16 and MX1 expression levels were significantly lower in coxsackie B virus(COXB)positive patients than the negative *** levels of one or more of BST2,IRF7,IFI16,TRIM21,MX1 and DDX58 genes were correlated with PCT levels,various white blood cell counts,and serum antibody levels that reflect disease course of *** aminotransferase was correlated with BST2,MX1 and DDX58 expression ***:PRR-associated genes likely initiate the immune response in patients at the acute stage of HFMD.

关键词： Pattern recognition receptors(PRRs) Hand,foot,and mouth disease(HFMD) Immune Enterovirus 71(EV-A71)

Preliminary observation results of the Coherent Beacon Systemonboard the China Seismo-Electromagnetic Satellite-1

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2018年第6期2卷 505-514页

作者： Liang Chen Ming Ou yaping yuan Fang Sun Xiao Yu WeiMin Zhen China Research Institute of Radiowave Propagation Qingdao 266107 China

This paper reports, for the first time, observation results of the Coherent Beacon System(CBS) onboard the China SeismoElectromagnetic Satellite-1(CSES-1). We describe the CBS, and the Computerized Ionospheric Tomography(CIT) algorithm program is validated by numerical experiment. Two examples are shown, for daytime and nighttime respectively. The Equatorial Ionization Anomaly(EIA) can be seen, and the northern crest core is located at ～20°N in the reconstruction image at 07:28 UTC on 20 July 2018(daytime).Disturbances are shown in the reconstruction image at 18:40 UTC on 13 July 2018(nighttime). We find that beacon measurements are more consistent with ionosonde measurements than model results, by comparing Nm F2 at three sites at Lanzhou, Chongqing, and Kunming; consistency with ionosonde measurements validates beacon measurements. Finally, we have studied Vertical Total Electron Content(VTEC) variations from ground to ～500 km(the height of CSES-1 orbit) and ratios of VTEC between beacon measurements and CODE(Center for Orbit Determination in Europe) data. VTEC variation from ground to ～500 km has a range of 7.2–16.5 TECU for the daytime case and a range of 1.1–1.7 TECU for the nighttime case. The Beacon/CODE ratio of VTEC varies with latitude and time. The mean Beacon/CODE ratio is 0.69 for the daytime case and 0.26 for the nighttime case. The fact that the nighttime case yields lower ratios indicates the higher altitude of the ionosphere during nighttime when the ionosphere is assumed to be a thin layer.

关键词： Coherent Beacon System(CBS) China Seismo-Electromagnetic Satellite-1(CSES-1) Computerized Ionospheric Tomography(CIT) Total Electron Content(TEC)

The Relationship between Social Support and the Parenting Sense of Competence of Preschoolers’Fathers:The Mediator Role of Psychological Capital

在线全文

学校读者我要写书评

暂无评论

Frontiers of Education in China 2024年第1期19卷 61-82页

作者： yuan Haojie YUE yaping WU Dandan Faculty of Education Henan UniversityKaifeng 475004China Faculty of Education and Human Development The Education University of Hong KongHong Kong 999077China

Social support is an essential source of support for preschool children’s fathers to alleviate parenting anxiety,deal with parenting pressure,improve parenting methods,and enhance parenting sense of *** capital serves as a critical psychological resource for preschoolers’fathers,helping them cope with parenting stress and enhancing parenting *** explore the mediating mechanism of psychological capital between social support and the parenting sense of competence of preschoolers’fathers,this study employs stratified sampling to survey 678 fathers from three cities of Henan province in *** survey instruments mainly consist of the Social Support Rating Scale,Psychological Capital Questionnaire,and Parenting Sense of Competence *** findings show that social support,psychological capital,and fathers’parenting sense of competence are at the middle *** positive correlations exist among social support,psychological capital,and parenting sense of *** support can positively predict fathers’parenting sense of competence,while psychological capital partially mediates between social support and parenting sense of ***,it is possible to increase social support for preschool children’s fathers and improve their psychological capital to relieve their parenting pressure,enhance their parenting participation,and strengthen their parenting sense of competence.

关键词： fathers of preschoolers parenting sense of competence social support psychological capital