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Freestanding MoSe_(2)nanoflowers for superior Li/Na storage properties

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Tungsten 2024年第1期6卷 238-247页

作者： Qiao Cu chao-Qun shang Guo-Fu Zhou Xin Wang Guangdong Provincial Key Laboratory of Optical Information Materials South China Normal UniversityGuangzhou 510006China School of Materials Science and Engineering and Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Wuhan Institute of TechnologyWuhan 430205China International Academy of Optoelectronics at Zhaoqing South China Normal UniversityZhaoqing 526060China

MoSe_(2),with high theoretical specific capacity,has attracted a lot of *** remains an open challenge to effectively suppress the irreversible selenium dissolution and rapid capacity decrease induced by severe volume change during ***,we synthesize MoSe_(2)nanoflowers dispersed on one-dimensional(1D)N-doped carbon nanofibers(MoSe_(2)@NCNFs)for use as a freestanding *** this unique structure,the 1D N-doped carbon nanofibers are found to not only enhance the conductivity but also ensure the structural integrity during the Li^(+)/Na^(+)insertion/destraction *** expected,at 2 A·g^(-1),the specific capacity of the MoSe_(2)@NCNFs is maintained at 180 mAh·g^(-1)after 500 cycles when used in lithium storage ***,in the case of sodium storage,at 1 A·g^(-1),the MoSe_(2)@NCNFs shows a capacity of 122mAh·g^(-1)after 500 *** findings suggest that the MoSe_(2)@NCNF electrodes may be a promising candidate for use in reversible Li/Na storage applications.

关键词： Li/Na storage Freestanding electrode MoSe_(2) Electrochemical reaction kinetics Structural integrity

脓毒症患者血清HMGB1、sTLT-1、NLR变化及其对并发急性肺损伤的预测价值

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海南医学 2024年第12期35卷 1736-1739页

作者：张建新马尚超宋浩殷飞崔俊伟新乡医学院第一附属医院重症医学科河南卫辉453100 新乡医学院第一附属医院结核内科河南卫辉453100

目的探讨脓毒症患者血清高迁移率族蛋白B1(HMGB1)、可溶性髓样细胞触发受体样转录因子-1(sTLT-1)、中性粒细胞/淋巴细胞比值(NLR)变化及其对并发急性肺损伤(ALI)的预测价值。方法回顾性分析2022年1月至2023年12月新乡医学院第一附属医... 详细信息

目的探讨脓毒症患者血清高迁移率族蛋白B1(HMGB1)、可溶性髓样细胞触发受体样转录因子-1(sTLT-1)、中性粒细胞/淋巴细胞比值(NLR)变化及其对并发急性肺损伤(ALI)的预测价值。方法回顾性分析2022年1月至2023年12月新乡医学院第一附属医院收治的120例脓毒症患者的临床资料,根据住院期间是否发生ALI分为ALI组35例、非ALI组85例。比较ALI组与非ALI组、ALI组不同病情程度患者血清HMGB1、sTLT-1、NLR水平,并采用受试者工作(ROC)曲线分析血清HMGB1、sTLT-1、NLR对脓毒症并发ALI的预测价值。结果ALI组患者的血清HMGB1、sTLT-1、NLR水平分别为(74.21±11.70)pg/mL、(593.06±82.45)pg/mL、5.13±1.16,明显高于非ALI组的(60.15±7.95)pg/mL、(525.73±54.84)pg/mL、4.08±0.64,差异均有统计学意义(P<0.05);ALI组中,高危组患者的血清HMGB1、sTLT-1、NLR水平分别为(86.43±5.90)pg/mL、(686.31±23.91)pg/mL、(6.49±1.11),明显高于中危组的(76.64±11.44)pg/mL、(599.28±88.40)pg/mL、5.27±1.00及低危组的(64.48±5.06)pg/mL、(539.93±35.90)pg/mL、4.27±0.71,且中危组患者均高于低危组,差异均有统计学意义(P<0.05);血清HMGB1、sTLT-1、NLR联合预测脓毒症并发ALI的曲线下面积(AUC)、敏感度、特异度分别为0.890、90.60%、92.10%,HMGB1单独检测分别为0.848、84.70%、77.10%,sTLT-1单独检测分别为0.732、71.40%、68.20%,NLR单独检测分别为0.785、62.90%、84.20%,联合检测高于各指标单独检测(P<0.05)。结论脓毒症并发ALI患者血清HMGB1、sTLT-1、NLR明显升高,且三者联合检测对并发ALI有较高的预测价值。

关键词：脓毒症急性肺损伤高迁移率族蛋白B1 可溶性髓样细胞触发受体样转录因子-1 中性粒细胞/淋巴细胞比值预测价值

贝母素乙通过诱导G0/G1期阻滞抑制结肠癌细胞的增殖

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中国肿瘤生物治疗杂志 2024年第4期31卷 326-332页

作者：孙丽丽白冰杨霞李玥李一权韩继成房金波李霄尚超朱羿龙金宁一延边大学医学院病理学与病理生理学教研室吉林延吉136200 长春中医药大学院士工作室吉林长春130117 中国农业科学研究院长春兽医研究所吉林长春130122

目的:探讨贝母素乙对结肠癌HCT116细胞增殖的抑制作用及其分子机制。方法:利用不同浓度的贝母素乙处理人结肠癌细胞HCT116和正常结肠上皮细胞CCD841 CON,通过CCK-8法和结晶紫染色法检测贝母素乙对HCT116和CCD841 CON细胞增殖活力的影响... 详细信息

目的:探讨贝母素乙对结肠癌HCT116细胞增殖的抑制作用及其分子机制。方法:利用不同浓度的贝母素乙处理人结肠癌细胞HCT116和正常结肠上皮细胞CCD841 CON,通过CCK-8法和结晶紫染色法检测贝母素乙对HCT116和CCD841 CON细胞增殖活力的影响,流式细胞术和WB法检测贝母素乙对HCT116细胞周期及其细胞周期相关蛋白表达的影响。构建HCT116移植瘤裸鼠模型和AOM/DSS结肠癌小鼠模型,观察贝母素乙对小鼠模型肿瘤生长和OS的影响,免疫组化法和WB法检测对移植瘤或肿瘤组织中细胞周期相关蛋白CDK4、CDK6和cyclin D1表达的影响。结果:贝母素乙可显著抑制结肠癌HCT116细胞的增殖能力(P<0.01),诱导HCT116细胞周期G0/G1期阻滞(P<0.01),降低CDK4、CDK6和cyclin D1的蛋白表达水平(均P<0.01)。荷瘤小鼠实验结果显示,贝母素乙(0.75 mg/kg)显著抑制HCT116细胞移植瘤的生长并延长荷瘤裸鼠的OS(P<0.05或P<0.01),降低AOM/DSS模型小鼠的体质量、延长OS、减少癌变肠组织的肿瘤个数和肿瘤体积,下调肿瘤组织中CDK4、CDK6和cyclin D1的蛋白表达(P<0.01或P<0.05)。结论:贝母素乙通过下调CDK4、CDK6和cyclin D1的表达水平,引起细胞周期G0/G1期阻滞,从而抑制结肠癌HCT116细胞的增殖。

关键词：贝母素乙结肠癌 HCT116细胞 G0/G1期阻滞增殖

Magnetic field-induced electronic phase transition in the Dirac semimetal state of black phosphorus under pressure

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Science Bulletin 2018年第23期63卷 1539-1544页

作者： Zeliang Sun Ziji Xiang Zhongyi Wang Jinglei Zhang Long Ma Naizhou Wang chao shang Fanbao Meng Liangjian Zou Yuanbo Zhang Xianhui Chen Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics and CAS Key Laboratory of Strongly-Coupled Quantum Matter PhysicsUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Materials Physics Institute of Solid State PhysicsChinese Academy of SciencesHefei 230031China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions and High Magnetic Field LaboratoryChinese Academy of SciencesHefei 230031China State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Different instabilities have been confirmed to exist in the three-dimensional(3D) electron gas when it is confined to the lowest Landau level in the extreme quantum limit. The recently discovered 3D topological semimetals offer a good platform to explore these phenomena due to the small sizes of their Fermi pockets, which means the quantum limit can be achieved at relatively low magnetic fields. In this work, we report the high-magnetic-field transport properties of the Dirac semimetal state in pressurized black phosphorus. Under applied hydrostatic pressure, the band structure of black phosphorus goes through an insulator-semimetal transition. In the high pressure topological semimetal phase, anomalous behaviors are observed on both magnetoresistance and Hall resistivity beyond the relatively low quantum limit field, which is demonstrated to indicate the emergence of an exotic electronic state hosting a density wave ordering. Our findings bring the first insight into the electronic interactions in black phosphorus under intense field.

关键词： Black phosphorus High magnetic field Quantum limit Electron phase transition

Magnetic-field enhanced high-thermoelectric performance in topological Dirac semimetal Cd3As2 crystal

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Science Bulletin 2018年第7期63卷 411-418页

作者： Honghui Wang Xigang Luo Weiwei Chen Naizhou Wang Bin Lei Fanbao Meng chao shang Likuan Ma Tao Wu Xi Dai Zhengfei Wang Xianhui Chen Hefei National Laboratory for Physical Science at Microscale and Department of Physics University of Science and Technology of China and Key Laboratory of Strongly-coupled Quantum Matter Physics. Chinese Academy of Sciences Hefei 230026 China Physics Department Hong Kong University of Science and Technology Hang Kong China High Magnetic Field Laboratory of the Chinese Academy of Sciences Hefei 230031 China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China

Thermoelectric materials can be used to convert heat to electric power through the Seebeck effect. We study magneto-thermoelectric figure of merit （ZT） in three-dimensional Dirac semimetal Cd3A 5 2 crystal. It is found that enhancement of power factor and reduction of thermal conductivity can be realized at the same time through magnetic field although magnetoresistivity is greatly increased. ZT can be highly enhanced from 0.17 to 1.1 by more than six times around 350 K under a perpendicular magnetic field of 7 T. The huge enhancement of ZT by magnetic field arises from the linear Dirac band with large Fermi velocity and the large electric thermal conductivity in CdsA 5 2. Our work paves a new way to greatly enhance the thermoelectric performance in the quantum topological materials.

关键词： Dirac semimetal Thermoelectric material Magnetic field Enhancement of figure of merit

Comparison of thermal and light performance in two typical Chinese solar greenhouses in Beijing

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International Journal of Agricultural and Biological Engineering 2019年第1期12卷 24-32页

作者： Fan Xu chao shang Hongling Li Xuzhang Xue Weituo Sun Hong Chen Yinkun Li Zhenhe Zhang Xinxu Li Wenzhong Guo Beijing Research Center of Intelligent Equipment for Agriculture Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China Plant Science and Technology College Beijing University of AgricultureBeijing 102206China Beijing Extension Station for Agricultural Technology Beijing 100101China National Agricultural Technology Extension and Service Center Ministry of Agriculture and Rural Affairs of the People’s Republic of ChinaBeijing 100125China

Solar greenhouses have been used for producing vegetables in northern China during early spring,late autumn or *** improve the thermal performance of solar greenhouses,a traditional type and a retrofitted design were comparatively *** the retrofitted design,three adjustments were incorporated:the material and structure of the walls,south-facing roof angle,and structure of the north-facing *** results indicated that the thermal and light performance of the retrofitted greenhouse was much better than that of the traditional ***,the daily mean temperature,minimum air temperature,and soil temperature inside the greenhouses after retrofit ting were increased by 1.3,2.4,and 1.9℃,respectively,meanwhile,the daily total solar radiation and PAR were increased by 28.2%and 9.2%,*** wall temperature and its daily variation range were reduced with increasing depth and *** characteristic analysis of heat storage and release indicated that higher locations have longer heat storage,and shorter heat release time in vertical direction,as well as a lower ratio of heat release to *** horizontal direction,the western wall has the shortest heat storage time but the highest heat release flux ***,the heat storage time of the wall is 1.5 h less than that of the *** heat storage flux density of the wall is 1.5 times of that of the soil,but the heat release flux is only 61%of the soil’s *** total wall heat storage is half of that of the soil in the greenhouse;the total wall heat release amount is only a quarter of that of the ***,the thermal environment of solar greenhouses can be further improved by improving the thermal insulation properties of the wall.

关键词： structural change heat storage performance heat flux back wall thermal environment

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湖北荆州沙市机场鸟类物种多样性分析

山东林业科技 2024年第2期54卷 8-16页

作者：尚超王虎翼甘惠婷周琳颜恒徐志红张志强中南林业科技大学野生动植物保护研究所湖南长沙410004 湖南应用技术学院农林科技学院湖南常德415100 湖北荆州沙市机场飞行区管理部湖北荆州434000

开展机场及周边区域鸟情调查,是机场鸟击防范的一项基础工作。为掌握新建湖北荆州沙市机场净空区鸟情,2020年6月至2023年2月,采用样线法对该机场净空区鸟类群落物种多样性及其分布格局进行了系统调查,期间共记录到鸟类146种,隶属于17目4... 详细信息

开展机场及周边区域鸟情调查,是机场鸟击防范的一项基础工作。为掌握新建湖北荆州沙市机场净空区鸟情,2020年6月至2023年2月,采用样线法对该机场净空区鸟类群落物种多样性及其分布格局进行了系统调查,期间共记录到鸟类146种,隶属于17目48科,其中鹬科鸟类物种数最多,其次是鹭科鸟类。鸟类群落中留鸟最多为48种,其次为冬候鸟41种,再次为夏候鸟36种;鸟类的区系构成表现为,古北界物种为71种,东洋界物种为51种,广布种为24种。通过季节间鸟类群落物种多样性比较,显示秋季鸟类群落的多样性指数最高(3.044),春季最低(2.298)。通过生境间的鸟类群落物种多样性比较,显示乔木林鸟类群落的多样性指数最高(3.236),村落最低(1.696)。调查结果表明,荆州沙市机场净空区鸟类群落物种丰富度和多样性水平较高,秋季候鸟迁徙期和夏季鸟类繁殖期成为全年鸟类活动频繁季节,潜在鸟击风险高;乔木林和农田成为机场周边鸟类最适宜的栖息地,也是鸟类侵入机场内活动的最主要鸟源地。

关键词：鸟击鸟类群落物种多样性湖北荆州沙市机场

Reconfigurable time-stretched swept laser source with up to 100 MHz sweep rate,100 nm bandwidth,and 100 mm OCT imaging range

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Photonics Research 2020年第8期8卷 1360-1367页

作者： DONGMEI HUANG FENG LI chao shang ZIHAO CHENG P.K.A.WAI Photonics Research Centre Department of Electronic and Information EngineeringThe Hong Kong Polytechnic UniversityHong Kong SARChina The Hong Kong Polytechnic University Shenzhen Research Institute Shenzhen 518057China Photonics Research Centre Department of Electrical EngineeringThe Hong Kong Polytechnic UniversityHong Kong SARChina Key Laboratory of Luminescence and Optical Information Ministry of EducationSchool of ScienceBeijing Jiaotong UniversityBeijing 100044China

The sweep rate,sweep range,and coherence length of swept sources,respectively,determine the acquisition rate,axial resolution,and imaging range of optical coherence tomography(OCT).In this paper,we demonstrate a reconfigurable high-speed and broadband swept laser by time stretching of a flat spectrum femtosecond pulse train with over 100 nm bandwidth and a repetition rate of 100 *** incorporating an optical modulator and utilizing appropriate dispersive modules,the reconfiguration of the swept source is demonstrated with sweep rates of 25 and 2.5 *** 2.5 MHz swept source enables an imaging range of>110 mm with 6 dB sensitivity rolloff in OCT,which is the longest imaging range ever reported for megahertz OCT.

关键词： laser modulator source

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基于粒子群优化的稀疏分解变尺度快速算法

系统工程与电子技术 2012年第1期34卷 46-49页

作者：韩宁尚朝轩军械工程学院雷达工程教研室河北石家庄050003

针对一类可分稀疏性度量函数,结合最优化理论,研究了稀疏信号重构的快速算法。稀疏分解可以看成是一个带等式约束的优化问题,首先利用惩罚函数法将其转化为无约束优化问题;然后在粒子群优化估计搜索步长的基础上,利用变尺度法寻找无约... 详细信息

针对一类可分稀疏性度量函数,结合最优化理论,研究了稀疏信号重构的快速算法。稀疏分解可以看成是一个带等式约束的优化问题,首先利用惩罚函数法将其转化为无约束优化问题;然后在粒子群优化估计搜索步长的基础上,利用变尺度法寻找无约束优化问题的最优解;最后依次增大惩罚因子,直至稀疏表示系数满足分解精度的要求。该算法避免了矩阵求逆运算,且无需先验地选取惩罚因子。仿真实验验证了算法的有效性和快速性。

关键词：稀疏分解等式约束优化变尺度法粒子群优化