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Size,composition,and mixing state of individual aerosol particles in a South China coastal city

Journal of Environmental Sciences 2010年第4期22卷 561-569页

作者： Weijun Li Longyi Shao Zhishi Wang Rongrong Shen shusheng Yang Uwa Tang State Key Laboratory of Coal Resources and Safe Mining College of Geoscience and Surveying Engineering China University of Mining and Technology (Beijing) Beijing 100083 China. Faculty of Science and Technology University of Macao Macao China Environment Research Institute Shandong University Shandong 250100 China

Aerosol samples were collected in summer in Macao, a coastal city of the Pearl River Delta Region in China. Morphology, size, elemental composition, and mixing state of individual aerosol particles were determined by scanning electron microscopy coupled energy dispersive X-ray （SEM/EDX） and transmission electron microscopy （TEM）. Based on the morphologies of 5711 aerosol particles, they consist of soot （32%）, mineral （17%）, secondary-（22%）, and unknown fine particles （29%）. The sizes of these particles were mostly distributed between 0.1 and 0.4 μm. Compositions of 202 mineral particles were obtained by SEM/EDX. Mineral particles were mainly classified into three types： Si-rich, Ca-rich, and Na-rich. The compositions of typical mineral particles can indicate their sources in sampling location. For example, mineral particles, collected along the main street, were associated with trace amounts of heavy metals, such as Zn, Ti, Mn, Ba, Pb, and As. TEM observations indicate that most Na-rich particles were aged sea salt particles （e.g., Na2SO4 and NaNO3） which formed through heterogeneous chemical reactions between sea salt and acidic gases. Additionally, aging time of soot was short in Macao due to high humidity, high temperature, and high levels of sunlight in Macao. Most of soot and fine mineral dust particles were internally mixed with secondary particles.

关键词： individual aerosol particles soot heterogeneous reaction sea salt

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The loop effects on the chargino decays _1~±→_1~0ff' in the MSSM

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Chinese Science Bulletin 2014年第17期59卷 1968-1977页

作者： Qingjun Xu shusheng Xu Zhenjun Xiao Ligang Jin Department of Physics Hangzhou Normal University State Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of Sciences Department of Physics and Institute of Theoretical Physics Nanjing Normal University

The lighter chargino three body decays_1~±→_1~0ff' via the W boson and the charged Higgs boson H± were studied in the R-parity conserved Minimal Supersymmetric Standard Model(MSSM).We treat _1~± decays as production and decay of W± and H±:i.e.,_1~±→_1~0W±(H±)→_1~0ff'.Both higgsinolike and wino-like^v1decays were well *** decays are calculated at 1-loop level and the loop corrections are found to be less than three *** signal of the charged Higgs H production from^v1decays is *** will offer important information about the chargino and neutralino sector,as well as the charged Higgs sector in the MSSM.

关键词： MSSM 衰减 Higgs玻色子环路标准模型宇称守恒衰变打火机

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Mid-Cretaceous Hothouse Climate and the Expansion of Early Angiosperms

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Acta Geologica Sinica(English Edition) 2018年第5期92卷 2004-2025页

作者： ZHANG Mingzhen DAI Shuang DU Baoxia JI Liming HU shusheng Key Laboratory of Petroleum Resources Gansu Province/ Key Laboratory of Petroleum Resources Research Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Key Laboratory of Mineral Resources in Western China (Gansu Province) and School of Earth Science Lanzhou University Division of Paleobotany Peabody Museum of Natural History Yale University

The remarkable transition of early angiosperms from a small to a dominant group characterized the terrestrial ecosystem of the Cretaceous. This transition was instigated and promoted by environmental changes. Mid-Cretaceous is characterized by major geological events that affected the global environment. δ^18O, palaeothermometer TEX86, and other climatic indices from marine sediments suggest rapid temperature increase during mid-Cretaceous despite occasional short cooling events. Simultaneously, terrestrial deposits in East Asia changed from coal-bearing to shale, then to red beds and evaporites. Plant assemblages and other paleoclimate indicators point to rapid aridification for midCretaceous terrestrial environments. In addition, the wildfires were frequently spread all over the earth by the numerous charcoal evidence during the Mid-Cretaceous. Thus, we speculate that the seasonally dry and hot conditions of mid-Cretaceous created a fiery hothouse world. Early angiosperms increased in abundance and diversity and evolved from a few aquatic species to terrestrial herbaceous and then to the diversified flora of today. Angiosperms showed rapid physiological evolution in vein density and leaf area that improved photosynthesis and water absorption. These ecophysiological changes made early angiosperms well adapted to the hot and dry environment in mid-Cretaceous. Moreover, these physiological changes facilitated the fire–angiosperm cycles in mid-Cretaceous that likely further stimulated the early angiosperm evolution.

关键词： Mid-Cretaceous hothouse wildfire early angiosperm diversification

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New Re-Os Dating of Auriferous Pyrite from the Suoluogou Large Gold Deposit in Muli County, West Sichuan Province

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 1270-1271页

作者： NIE Fei LIU shusheng SHI Meifeng SHI Hongzhao FAN Wenyu Chengdu Center China Geological Survey Chengdu 610081 Sichuan China

Objective The Suoluogou gold depositin Muli County of Sichuan Province is located in the southern section of the GanziLitang suture zone(***),which is the largest gold deposit discovered in this suture zone in recent *** present,the exploration of the Suoluogou gold deposit is still in progress,and the amount of resource is increasing.

关键词： the Suoluogou Large Gold Deposit West Sichuan Province

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Recent Advances in Nanopore Sensing

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Chinese Journal of Chemistry 2021年第7期39卷 2035-2043页

作者： Mengjie Cui Yaxian Ge Xiao Zhuge Xin Zhou Dongmei Xi shusheng Zhang Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers College of Chemistry and Chemical EngineeringLinyi UniversityLinyiShandong 276005China

Nanopore sensing is developing into a powerful label-free approach to investigate the features of biomolecules at the single-molecule *** a charged molecule is captured within a nanopore,it modulates the ionic current,which can be recorded in real time to reveal the properties of the target *** date,nanopores have been used to sense a variety of analytes,including DNA,RNA,proteins,enzymes,small molecules,cancer cells,and metal ions,and can also provide information on biomolecular *** this review,we highlight the progress made in nanopore sensing over the past five years(2016-2020),and provide an outlook on future developments and directions in the field.

关键词： Ion channels Biosensors Nanopore Biomolecule Single-molecule studies

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Dual in-situ observation of tribochemical and morphological evolution of single-layer WS_(2)and multi-layer WS_(2)/C coatings

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Friction 2024年第7期12卷 1580-1598页

作者： Yuzhen LIU Jae-Ho HAN shusheng XU Young Chan JUNG Dae-Eun KIM State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Department of Mechanical Engineering Yonsei UniversitySeoul03722Republic of Korea Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai Yantai 264000China Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai 264000China

The outstanding tribological performance of transition metal dichalcogenides(TMDs)is attributed to their unique sandwich microstructure and low interlayer shear *** advantageous structure allows TMDs to demonstrate exceptional friction reduction ***,the incorporation of TMDs and amorphous carbon(a-C)in multi-layer structures shows excellent potential for further enhancing tribological and anti-oxidation *** carbon,known for its high ductility,chemical inertness,and excellent wear resistance,significantly contributes to the overall performance of these multi-layer *** gain an in-depth understanding of the tribological mechanism and evolution of TMDs’multi-layer coatings,a dual in-situ analysis was carried out using a tribometer equipped with a 3D laser microscope and a Raman *** innovative approach allowed for a comprehensive evolution of the tribological,topographical,and tribochemical characteristics of both single-layer WS_(2)and multi-layer WS_(2)/C coatings in real *** findings from the dual in-situ tribotest revealed distinct failure characteristics between the single-layer WS_(2)coating and the multi-layer WS_(2)/C *** single-layer WS_(2)coating predominantly experienced failure due to mechanical removal,whereas a combination of mechanical removal and tribochemistry primarily influenced the failure of the multi-layer WS_(2)/C *** tribological evolution process of these two coatings can be classified into four stages on the basis of their tribological behavior:the running-in stage,stable friction stage,re-deposition stage,and lubrication failure *** stage represents a distinct phase in the tribological behavior of the coatings and contributes to our understanding of their behavior during sliding.

关键词： In-situ analysis multi-layer coating tribology tribochemistry

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A NOTE ON A STRONG UNIQUENESS THEOREM OF STRAUSS

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Analysis in Theory and Applications 1994年第1期10卷 14-19页

作者： Xu shusheng Jiangnan University, China Mathematics Department Jiangnan University Jiangsu Wuxi P. R. China

In this paper we present a correction of the proofofa strong uniqueness theorem given by *** in 1992 on approximation by reciprocals of functions of an n-dimensional space span (u_1,…,u_n) satisfying coefficient cons... 详细信息

关键词： Haar A NOTE ON A STRONG UNIQUENESS THEOREM OF STRAUSS APPI

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Single atom catalyst for electrocatalysis

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Chinese Chemical Letters 2021年第10期32卷 2947-2962页

作者： Jianan Su Linzhou Zhuang shusheng Zhang Qingju Liu Longzhou Zhang Guangzhi Hu School of Materials and Energy and Yunnan Key Laboratory for Micro/nano Materials&Technology Institute of Optoelectronic Information MaterialsYunnan UniversityKunming 650091China School of Chemical Engineering East China University of Science and TechnologyShanghai 200237China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450000China

Single atom catalyst(SAC)refers to a novel catalyst with the active metal atoms individually anchored on the *** atom catalysts present the unique appeal due to the high atomic availability and specific activity,as well as the high pathway ***,we summarized the classification,preparation,characterization,and application of single atom ***,the current bottlenecks and the outlooks of the SAC research are discussed.

关键词： Single atom catalyst Electrocatalysis Oxygen reduction reaction Hydrogen evolution reaction Oxygen evolution reaction

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Geological Features,Mineralization Types and Metallogenic Setting of the Phlaythong Large Iron Deposit,Southern Laos

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Acta Geologica Sinica(English Edition) 2015年第4期89卷 1423-1424页

作者： LIU shusheng FAN Wenyu LUO Maojin YANG Yongfei College of Earth Sciences Chengdu University of Technology Chengdu Center China Geological Survey

The Phlaythong large iron deposit in Shampasak of southern Laos,is located in the Kon Tum microblock （Fig.1A）,central-southern part of the Indo-China block,and the geographic coordinate of the central mining area is... 详细信息

关键词： Geological Features,Mineralization Types and Metallogenic Setting of the Phlaythong Large Iron Deposit,Southern Laos TFe

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Physical simulation experiment and numerical inversion of the full life cycle of shale gas well

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Petroleum Research 2019年第2期4卷 181-190页

作者： shusheng Gao Huaxun Liu Liyou Ye Zhiming Hu Weiguo An Research Institute of Petroleum Exploration&Development CNPCBeijing100083China Department of Porous Flow&Fluid Mechanics Research Institute of Petroleum Exploration&DevelopmentPetroChinaHebeiLangfang065007China

The ultra-low porosity and permeability,as well as complex occurrence and transport state of shale reservoir make it possess special L-type production characteristic curve and complicated shale gas flow *** solve the difficulty of collecting complete production data due to short production time and operation discontinuity,a full-diameter core physical simulation experiment on the full lifecycle production process of shale gas well depletion is conducted with the purpose of obtaining many important production data including complete pressure and daily gas output in the simulated production process of shale gas *** experimental results show the production characteristic from simulation is consistent with those from gas *** on the simulation data,the critical desorption pressure(12 MPa)of core,free gas production(3820.8 mL),adsorbed gas production(2151.2 mL),the proportion of the daily gas production between free and absorbed gas under different time and formation pressure,as well as the production time and final recovery rate corresponding to abandoned pressure,can be determined *** inversion is carried out to calculate the production performance curve of shale gas well and predict the development effect of gas well based on well testing and similarity analysis of the dimensionless time between core experiment and gas well ***,the permeability and the fracturing effect(fracture network density)as the keys to the effective development of shale gas reservoirs are *** permeability is the fundamental factor and the fracturing technology is the major means.

关键词： Shale gas well Full lifecycle Physical simulation experiment Numerical inversion Similarity theory Permeability Fracturing effect

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