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Chinese Journal of Chemistry 2014年第4期32卷 293-297页

作者： hanzhi zhang Chao Liu Xuepei zhang Jingwu Kang Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032China

A simple approach for the preparation of emitter of electrospray ionization mass spectrometry by covalently coating the fused-silica capillary tip with the conductive carbon-nanotube sol-gel composite material(CNTSCM)is *** CNTSCM was prepared by dispersing single-walled carbon nanotubes in the sol composed of a mixture of 3-glycidoxypropyltrimethoxysilane and 3-aminopropyltrimethoxysilane,and *** long-term sta-bility of the prepared ESI emitters was demonstrated by at least 180 h of continuous *** intensity obtained by the prepared emitter was mass-flux sensitive when the flow rate was lower than 500 nL/min,while the signal in-tensity performed a concentration dependence when the flow rate was in the range of 500-800 nL/*** use-fulness of such a prepared emitter was demonstrated by the analysis of various types of samples such as organic small molecular drugs,oligosaccharide,peptide,and protein.

关键词： electrospray emitter mass spectrometry carbon-nanotube sol-gel composite material

Drainage evolution in intermontane basins at the Qinling-Daba Mountains

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Science China Earth Sciences 2021年第11期64卷 1949-1968页

作者： Wanting XIE Xianyan WANG hanzhi zhang Quanyu LIU Shejiang WANG Huayu LU School of Geography and Ocean Sciences Nanjing UniversityNanjing 210023China Colleage of Tourism and Environment Resources Ankang UniversityAnkang 725000China Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China Center for Excellence in Life and Paleoenvironment Chinese Academy of SciencesBeijing 100044China

River capture is of great significance to landform evolution and hominine *** the Qinling-Daba Mountains,there is a viewpoint that Jialing River captured Hanjiang River,but this is still *** this paper,we discuss the drainage evolution processes in intermountain basins at the Qinling-Daba Mountains based on a combination of detrital zircon UPb geochronology and geomorphic *** suggest that the Hanjiang River gradually captured the Jialing River from east to west,accompanied by the evolution of the ancient Yangtze *** terms of geomorphic evidences,wide valleys did not match with discharge,and a series of wind gaps developed in the Shiquan-Ankang *** addition,the valley shapes and width-toheight ratios(Vf)indicate two possible rapid *** hypsometric integrals(HI)reflect that the landform gradually changes from the old stage to the youth stage from west to ***χvalues show that the drainage divide is moving to the side of the Yuehe River,and the Yuehe River is gradually *** to the sedimentary records,the zircon U-Pb age distributions indicate the provenance *** high-altitude terraces show three age peaks(200–250,400–505,and 700–900 Ma),with the dominant Indosinian age peak(200–250 Ma),while the modern fluvial sediments only show a single peak of Jinning(700–900 Ma).These data show that there are two major river captures:(1)The ancient Hanjiang River cut through the regional compression ridge,and then captured the Hanzhong Basin river system(a part of the ancient Jialing river system)from east to west,and(2)The southern tributary captured the trunk with the uplift of the divide in the Shiquan-Ankang Basin,forming the modern drainage pattern in the upper Hanjiang *** activities of the regional strike-slip fault,and the associated compression uplift played a key role in the river captures,the drainage evolution,and related landforms in the Shiquan-Ankang *** addition,it is shown that the

关键词： Geomorphic index Zircon U-Pb geochronology Drainage network pattern River capture Ankang fault Intermountain basin South Qinling

Experimental investigation of characteristics of instability evolution in a centrifugal compressor

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Chinese Journal of Aeronautics 2023年第4期36卷 174-189页

作者： hanzhi zhang Ce YANG Ben ZHAO Wei ZHAO Chenxing HU Wenli WANG Jianbing GAO Shijun SUN School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

The stable range of operation for the centrifugal compressor significantly influences the dynamic,economic,and environment-friendly characteristics of power systems.A deep understand-ing of the characteristics of instability evolution is necessary to improve the compressor stability.A centrifugal compressor equipped with a vaneless diffuser is experimentally investigated using high-response static-pressure *** results obtained indicate that three typical rotational-speed ranges exist based on the different instability evolution characteristics,which reveals the var-ious impeller–diffuser matching behaviors over the entire speed *** low-speed ranges((40%–75%)N_(max),N_(max)is the maximum rotational speed),the compressor exhibits stable,Rotating Insta-bility(RI),impeller stall(diffuser stall),and surge *** impeller stall mode is induced by RI and propagates downstream,resulting in the diffuser stall and compressor surge *** the medium-speed range((75%–85%)N_(max)),the compressor exhibits stable,diffuser stall,RI,and surge *** the high-speed range((85%–100%)N_(max)),the compressor exhibits stable,diffuser stall,and surge *** dominant instability position is shifted from the impeller to the diffuser as the rotational speed *** the impeller and diffuser stall present an irregular sawtooth static-pressure wave and exhibit broadband frequency spectrum patterns.

关键词： Centrifugal compressor Impellers Pressure measurement Rotating instability Stability Stall

Washing out heavy metals from contaminated soils from an iron and steel smelting site

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Frontiers of Environmental Science & Engineering 2015年第4期9卷 634-641页

作者： Guangxu ZHU Qingjun GUO Junxing YANG hanzhi zhang Rongfei WEI Chunyu WANG Marc PETERS Xiaoyong ZHOU Jun YANG Center for Environmental Remediation Institute of Geographical Sciences and Natural Resources Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China

Washing is a promising method for separating contaminants bound to the particles of soil ex-situ by chemical mobilization. Laboratory batch washing experi- ments were conducted using deionized water and varying concentrations of oxalic acid, citric acid, tartaric acid, acetic acid, hydrochloric acid and ethylenediaminetetra acetic acid （EDTA） to assess the efficiency of using these chemicals as washing agents and to clean up heavy metals from two heavily polluted soils from an iron and streel smelting site. The toxicity reduction index and remediation costs were analyzed, and the results showed that the soils were polluted with Cd, Pb and Zn. Hydrochloric acid and EDTA were more efficient than the other washing agents in the remediation of the test soils. The maximum total toxicity reduction index showed that 0.5 mol·L^-1 hydro- chloric acid could achieve the remediation with the lowest costs.

关键词： heavy metals soil washing toxicity reduction index iron and steel smelting site

Evaluation and prospect of scientific research capacity ranking for community healthcare centres in China

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Family Medicine and Community Health 2020年第1期8卷 59-63页

作者： Qian Liu Jianwei Shi Dehua Yu Hua Jin Xuhua Ge hanzhi zhang Zhaoxin Wang School of Economics and Management Tongji UniversityShanghaiChina School of Public Health Shanghai Jiao Tong University School of MedicineShanghaiChina Department of General Practice Tongji University Affilliated Yangpu HospitalShanghaiChina Shanghai General Practice and Community Health Development Research Center ShanghaiChina General Practice Center Southern Medical University Affiliated Nanhai HospitalGuangzhouChina

The National Health and Family Planning Commission of the People's Republic of China has proposed to improve the medical capacity of general practitioners and the establishment of general practice in recent health *** the first time,the ability to conduct scientific research was included in this reform,which demands community healthcare centres(CHCs)to strengthen their research *** evaluation of community scientific research capacity has become an important endeavour to promote the implementation of research in *** 2016,our research team has been working on an evaluation system and has published the scientific research capacity ranking for the top 100 CHCs in *** latest released ranking of scientific research capacities of China CHCs has aroused great attention in the country.

关键词： centre ranking capacity

Cadmium accumulation and tolerance of two castor cultivars in relation to antioxidant systems

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Journal of Environmental Sciences 2014年第10期26卷 2048-2055页

作者： hanzhi zhang Qingjun Guo Junxing Yang Tongbin Chen Guangxu Zhu Marc Peters Rongfei Wei Liyan Tian Chunyu Wang Deyun Tan Jie Ma Gangming Wang Yingxin Wan Center for Environmental Remediation Institute of Geographical Sciences and Natural Resources Chinese Academy of Sciences University of Chinese Academy of Sciences Zibo Academy of Agricultural Sciences China University of Geosciences College of Applied Arts and Science of Beijing Union University

To investigate the effects of Cd on tolerance and antioxidant activities of castor, two different castor（Ricinus communis L.） cultivars（Zibo No. 5 and Zibo No. 8） were used for a hydroponic experiment（0, 1 and 2 mg/L Cd） and a pot experiment using Cd-contaminated soil（34 mg/kg） with the addition of ethylenedinitrilotetraacetic acid（EDTA）. The results indicated that there were significant differences between the two cultivars with respect to Cd uptake in shoots（113–248 mg/kg for Zibo No. 5 and 130–288 mg/kg Zibo No. 8）, biomass tolerance indexes（64.9%–74.6% for Zibo No. 5 and 80.1%–90.9% for Zibo No. 8） in the hydroponic experiment and survival rates（0% for Zibo No. 5 and 100% for Zibo No. 8）determined by the addition of EDTA in the pot experiment, suggesting that Zibo No. 8 has higher tolerance than Zibo No. 5. Moreover, the castor cultivars have low bioconcentration factors（4.80% for Zibo No. 5 and 5.43% for Zibo No. 8） and low translocation factors（〈1%）.Consequently, Zibo No. 8 can participate in Cd phytostabilization in highly Cd-polluted areas. The results indicated that glutathione（GSH） as a non-enzymatic antioxidant, and antioxidant enzymes including superoxide dismutase（SOD）, catalase（CAT） and guaiacol peroxidase（GPX）, were cultivar- and dose-dependent. The higher tolerance of Zibo No. 8compared with Zibo No. 5 can be attributed to the higher GSH levels in the root and higher GPX activity in the leaf.

关键词： Cadmium Castor Antioxidant activity Tolerance Phytoremediation

East Asian paleoclimate change in the Weihe Basin (central China) since the middle Eocene revealed by clay mineral analysis

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Science China Earth Sciences 2021年第10期64卷 1285-1304页

作者： Hengzhi LYU Huayu LU Yichao WANG hanzhi zhang Yao WANG Kexin WANG Wen LAI Zhifei LIU Yanli LI Junfeng JI Frontiers Science Center for Critical Earth Material Cycling School of Geography and Ocean ScienceNanjing UniversityNanjing 210023China State Key Laboratory of Marine Geology School of Ocean and Earth ScienceTongji UniversityShanghai 200092China Key Laboratory of Surficial Geochemistry Ministry of EducationSchool of Earth Sciences and EngineeringNanjing UniversityNanjing 210023China

Obtaining a continuous sedimentary record of Cenozoic East Asian paleoclimate change is key to understand the origin,evolution and driving mechanism of the East Asian monsoon and climate *** on the continuous Cenozoic fluvial and lacustrine sedimentary sequence in the Weihe Basin,central China,we carried out research on the content and crystal parameters of clay *** paleoclimate change since the middle Eocene was reconstructed *** results show that smectite and illite are the dominant clay minerals in fluvial-lacustrine sediments of Weihe *** crystallinity of illite,the chemical index of illite,the ratio of smectite to illite and chlorite decrease gradually,which indicates that chemical weathering in the Weihe River watershed stepwise weakened since the middle Eocene,under the background of a semi-arid and semi-humid *** formation of palygorskite may be affected by a weak *** this case,the content of smectite and the illite crystallinity caused by the weathering in the corresponding period may be actually higher than that of the current,which indicates that the climate in the Weihe Basin region was relatively warm and humid from the middle Eocene to *** the decrease of Cenozoic global temperature and the continuous accumulation of sediments,the intensity of chemical weathering in the Weihe Basin gradually weakened,and the East Asian monsoon climate gradually evolved until becoming dry in the *** from clay minerals also indicates that the aridification in the Weihe Basin from the late Eocene to the Oligocene may be a response to the global cooling event at the Eocene-Oligocene transition.

关键词： Cenozoic epoch Weihe Basin Clay mineral Paleoclimate East Asian moonsoon

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事实与价值的融合:伊斯顿后行为主义研究方法的内在逻辑

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武汉大学学报（哲学社会科学版） 2016年第2期69卷 23-28页

作者：张涵之武汉大学政治与公共管理学院

事实与价值的关系问题是当代政治学方法论争论的焦点。行为主义政治学倡导的"价值中立"在20世纪60年代末期遭遇了现实困境,致使行为主义方法对当时的社会政治问题研究丧失了效力。针对政治学的这一研究现状,伊斯顿对实证主义的观察方法... 详细信息

事实与价值的关系问题是当代政治学方法论争论的焦点。行为主义政治学倡导的"价值中立"在20世纪60年代末期遭遇了现实困境,致使行为主义方法对当时的社会政治问题研究丧失了效力。针对政治学的这一研究现状,伊斯顿对实证主义的观察方法与历史主义的解释方法进行了批判,并倡导价值的回归与重塑,主张把事实与价值统一于政治学研究方法中。事实与价值的融合,正是后行为主义政治学研究方法的内在逻辑。伊斯顿遵循这一逻辑而创立了政治系统论,丰富了政治学的研究方法和内容,开创了后行为主义政治学研究的基本思路。

关键词：戴维·伊斯顿政治学方法论行为主义政治学后行为主义政治系统