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Physical simulation of urban rainfall infiltration

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Journal of China University of Mining and Technology 2008年第2期18卷 293-295,304页

作者： LI jie zeng Bing wang Yan-xia SHEN Lei School of Resource and Earth Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

To meet the demand of urban rainwater integrated management,we designed and complemented a physical simulation experimental system of urban rainfall infiltration regulation *** discuss the feasibility of quantitative regulations of urban underlying surface rainfall infiltration conditions and a practical application of a simulated experimental *** a com- prehensive analysis of the composition of an effective rainwater harvesting system and selection of water storage material,we simulated the major parameters of an experimental area rainfall,soil moisture and water storage capacity by providing an effective regulation of the experimental area runoff coefficient,obtained from basic data.

关键词： urban rainwater integrated management infiltration condition underlying surface physical simulation

Clinicopathological analysis of 14 patients with combined hepatocellular carcinoma and cholangiocarcinoma

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Hepatobiliary & Pancreatic Diseases International 2011年第6期10卷 620-625页

作者： Xian-Huan Yu,Lei-Bo Xu,Hong zeng,Rui Zhang,jie wang and Chao LiuAuthor Affiliations:Department of Hepato-Pancreato-Biliary Surgery and Department of Pathology,Sun Yat-Sen Memorial Hospital,Sun Yat-Sen University,Guangzhou 510120,China Department of Hepato-Pancreato-Biliary Surgery Sun Yat-Sen Memorial Hospital Sun Yat-Sen University Guangzhou 510120 China Department of Pathology Sun Yat-Sen Memorial Hospital Sun Yat-Sen University Guangzhou 510120 China

BACKGROUND:Combined hepatocellular carcinoma and cholangiocarcinoma (cHCC-CC) is an uncommon subtype of primary hepatic carcinoma,and its prognosis is *** study was undertaken to investigate the prognosis and the clinicopathological characteristics of cHCC-CC,including their possible cellular ***:Among 852 patients with a primary hepatic carcinoma who underwent hepatectomy from January 1998 to April 2008 at our hospital,cHCC-CC was identified in 14 patients The clinicopathological characteristics of the 14 patients were analyzed *** expression of the liver stem cell markers (c-kit,CD90,CD133 and CK19) in the tumor tissue was detected by immunohistochemistry,and the Kaplan-Meier method was used to evaluate ***:Among the 14 patients,9 presented with abdominal pain,3 with anorexia and debilitation,and the remaining two patients were *** mean age was 53.6±3.0 (range 38-74) *** the included patients,11 had an elevated serum alpha-fetoprotein level,13 were infected with hepatitis B virus,9 had vascular invasion and 1 had lymph node metastasis The average diameter of the tumors was 9.9±1.1 (range 5.0-16.0) *** median overall survival time was 7.9±1.0 months In addition,the presence of the liver stem cell markers,c-kit CD90,CD133 and CK19 was 71.4%,85.7%,92.9% and 78.6% *** four markers were simultaneously expressed in eight ***:cHCC-CC has aggressive characteristics and the prognosis is extremely *** high expression of liver stem cell markers in the tumor tissue suggests that these tumors may derive from liver stem cells.

关键词： liver neoplasms hepatocellular carcinoma cholangiocarcinoma prognosis stem cells

Mesospheric tide comparisons at low latitudes observed by two collocated meteor radars

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Earth and Planetary Physics 2025年第1期9卷 54-68页

作者： Jian Li Wen Yi XiangHui Xue jie zeng HaiLun Ye JianYuan wang JinSong Chen Na Li TingDi Chen Chinese Academy of Sciences(CAS)Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Center for Excellence in Comparative Planetology Anhui Mengcheng Geophysics National Observation and Research StationUniversity of Science and Technology of ChinaHefei 230026China Hefei National Laboratory University of Science and Technology of ChinaHefei 230026China Collaborative Innovation Center of Astronautical Science and Technology Harbin 150001China National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave PropagationQingdao 266107China Yunnan Kunming Electromagnetic Environment National Observation and Research Station Qujing Kunming 655000China

Accurate knowledge of mesospheric winds and waves is essential for studying the dynamics and climate in the mesosphere and lower thermosphere(MLT)*** this study,we conduct a comparative analysis of the mesosphere tidal results obtained from two adjacent meteor radars at low latitudes in Kunming,China,from November 2013 to December *** two radars operate at different frequencies of 37.5 MHz and 53.1 MHz,***,overall good agreement is observed between the two radars in terms of horizontal winds and tide *** results show that the dominant tidal waves of the zonal and meridional winds are diurnal and semidiurnal ***,we conduct an exhaustive statistical analysis to compare the tidal amplitudes and vertical wavelengths recorded by the dual radar systems,which reveals a high degree of alignment in tidal *** investigation includes variances and covariances of tidal amplitudes,which demonstrate remarkable consistency across measurements from both *** finding highlights clear uniformity in the mesospheric tidal patterns observed at low latitudes by the two neighboring meteor *** of the comparative analysis specifically underscore the significant correlation in vertical wavelength measurements,validating the robustness of radar observations for tidal research.

关键词： mesosphere and lower thermosphere region meteor radar mesospheric winds tides

Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： jie wang Wei wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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HPLC测定盐酸氨基葡萄糖有关物质与含量

中国药学杂志 2017年第4期52卷 314-318页

作者：沈丹丹曾杰王玥张涛重庆市食品药品检验检测研究院重庆401121 重庆市药物过程与质量控制工程技术研究中心重庆401121 中南大学长沙410013 福安药业集团重庆礼邦药物开发有限公司重庆401121

目的建立HPLC测定不同厂家盐酸氨基葡萄糖制剂的含量及有关物质,考查了3种剂型8个厂家的产品质量差异。方法采用Phenomenex Luna NH2色谱柱(4.6 mm×250 mm,5μm),以磷酸盐缓冲液(称取7.0 g磷酸氢二钾溶解在适量水中,加0.5 m L氨水,加... 详细信息

目的建立HPLC测定不同厂家盐酸氨基葡萄糖制剂的含量及有关物质,考查了3种剂型8个厂家的产品质量差异。方法采用Phenomenex Luna NH2色谱柱(4.6 mm×250 mm,5μm),以磷酸盐缓冲液(称取7.0 g磷酸氢二钾溶解在适量水中,加0.5 m L氨水,加水稀释至2 000 m L,用磷酸调节p H值至7.5)-乙腈(25∶75)为流动相,流速为1.5 m L·min^(-1),柱温为30℃,检测波长为195 nm。结果盐酸氨基葡萄糖系统适用性试验符合要求,主峰与相邻杂质峰之间的分离度大于1.5。盐酸氨基葡萄糖在0.156 64~15.664 mg·m L^(-1)内线性关系良好(r=0.999 9)。平均回收率为101.14%,RSD为1.20%(n=9)。结论本方法可同时测定盐酸氨基葡萄糖的有关物质和含量测定,为该产品的质量控制提供参考。

关键词：盐酸氨基葡萄糖 N-乙酰氨基葡萄糖脱氧果糖含量测定高效液相色谱法质量控制

Cyano migration-mediated radical-polar crossover cyclopropanation

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Science China Chemistry 2025年第01期 241-248页

作者： Ziqiang wang Yasu Chen jie Li Chen Zhu Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry Chemical Engineering and Materials ScienceSoochow University Frontiers Science Center for Transformative Molecules Zhangjiang Institute for Advanced Study and Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs Shanghai Jiao Tong University

We report a novel cyano migration-mediated radical-polar crossover process, whereby both the sulfonylcyanation of aliphatic alkenes and the formation of cyclopropanes are concurrently achieved. This transformation yields a diverse array of multisubstituted cyclopropanes under mild photocatalytic conditions. Mechanistic studies elucidate that the reaction proceeds via intramolecular nucleophilic substitution, leading to the formation of the cyclopropane derivatives.

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Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes: accessing β-chiral sulfones bearing S-stereocentric cyclic sulfinamides

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Science China Chemistry 2025年第01期 257-263页

作者： Jiapian Huang Chenxin wang Xu wang Xiaoyu Zhou Wei Xiao jie Wu School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies Taizhou University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering Henan Normal University

The generation of various β-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is described. This method features a broad substrate scope and excellent stereospecificity. Computational studies reveal that the dispersion interaction between sulfinyl group and CH2SO2Ph group plays a crucial role in the stereoselectivity control.

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西藏山南地区沉错湖泊与径流水化学特征及主控因素初探

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干旱区地理 2017年第4期40卷 737-745页

作者：王利杰曾辰王冠星史晓楠张凡中国科学院青藏高原研究所环境与地表过程实验室北京100101 中国科学院青藏高原研究所高寒生态学与生物多样性重点实验室北京100101 中国科学院大学北京100049 中国科学院青藏高原地球科学卓越创新中心北京100101

选取枪勇冰川径流-卡鲁雄曲(河)-沉错(湖)为研究区域,开展高原湖泊及其补给河流与冰川径流的水化学特征研究,并探讨影响主离子组成的主控因素。结果表明:夏季湖水主要离子呈均匀混合状态,pH值、电导率、TDS及优势阴阳离子在整个湖泊空... 详细信息

选取枪勇冰川径流-卡鲁雄曲(河)-沉错(湖)为研究区域,开展高原湖泊及其补给河流与冰川径流的水化学特征研究,并探讨影响主离子组成的主控因素。结果表明:夏季湖水主要离子呈均匀混合状态,pH值、电导率、TDS及优势阴阳离子在整个湖泊空间上变化不显著;总体上,从上游冰川融水径流、河水至下游湖泊,离子浓度呈现上升趋势;融水径流及河水的水化学类型主要受岩石风化作用控制,表现为SO_4^(2-)-Ca^(2+)-Mg^(2+)类型;沉错湖水的水化学类型主要受蒸发结晶作用控制,表现为SO_4^(2-)-Na^+-Ca^(2+)类型,在蒸发作用下Ca^(2+)逐渐沉淀析出,Na^+浓度不断升高而成为绝对优势阳离子。

关键词：高原湖泊水化学特征主离子组成 Gibbs 主控因素

Ideal Bi-Based Hybrid Anode Material for Ultrafast Charging of Sodium-Ion Batteries at Extremely Low Temperatures

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NANO-MICRO LETTERS 2025年第1期17卷 1-16页

作者： Bai, jie Jia, Jian Hui wang, Yu Yang, Chun Cheng Jiang, Qing Jilin Univ Key Lab Automobile Mat Sch Mat Sci & Engn Minist Educ Changchun 130022 Peoples R China

Metallic nanoparticles with excellent size controllability and high loading rate are obtained via ultrafast high temperature shock *** Bi/CNRs-15 electrode exhibits an unprecedented rate performance (237.9 mAh g-1 at 2 A g-1) at - 60 degrees C, while the energy density of the full cell can reach to 181.9 Wh kg-1 at - 40 degrees C.A novel strategy of high-rate activation is proposed to obtain high capacity and superior stability at low temperature by creating new active sites for interfacial reaction. Sodium-ion batteries have emerged as competitive substitutes for low-temperature applications due to severe capacity loss and safety concerns of lithium-ion batteries at - 20 degrees C or lower. However, the key capability of ultrafast charging at ultralow temperature for SIBs is rarely reported. Herein, a hybrid of Bi nanoparticles embedded in carbon nanorods is demonstrated as an ideal material to address this issue, which is synthesized via a high temperature shock method. Such a hybrid shows an unprecedented rate performance (237.9 mAh g-1 at 2 A g-1) at - 60 degrees C, outperforming all reported SIB anode materials. Coupled with a Na3V2(PO4)3 cathode, the energy density of the full cell can reach to 181.9 Wh kg-1 at - 40 degrees C. Based on this work, a novel strategy of high-rate activation is proposed to enhance performances of Bi-based materials in cryogenic conditions by creating new active sites for interfacial reaction under large current.

关键词： Bi nanoparticles High temperature shock High-rate activation Ultrafast charging Low-temperature sodium-ion batteries