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Surface composition and electrochemical behavior of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material with copper additive

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Rare Metals 2012年第4期31卷 397-401页

作者： wang, jianhua Chen, Tiancai College of Material Science and Engineering Kunming University of Science and TechnologyKunming 650093China

LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2(NCM) cathode material containing copper was prepared by co-precipitation *** material was characterized by X-ray photoelectron spectroscopy(XPS) and galvanostatic *** data indicate that surface compositions of the samples containing copper are different from the bare *** on surface of particles was enriched,while nickel and lithium content was *** electrochemical performance of NCM was affected by the change of surface *** performance charged to the cutoff voltage of 4.6 V was improved by introducing copper into the *** effects of copper content on electrochemical behaviors of NCM at 4.5 V were discussed.

关键词： cathode Li-ion battery X-ray photoelectron spectroscopy(XPS) surface electrochemical

Metagenomic analysis on resistance genes in water and microplastics from a mariculture system

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Frontiers of Environmental Science & Engineering 2022年第1期16卷 77-89页

作者： Jian Lu Jun Wu jianhua wang CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone Research(YIC)Chinese Academy of Sciences(CAS)Shandong Key Laboratory of Coastal Environmental ProcessesYICCASYantai 264003China Yantai Research Institute Harbin Engineering UniversityYantai 264006China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China

Microplastics existing widely in different matrices have been regarded as a reservoir for emerging *** systems have been observed to host microplastics and antibiotic resistance genes(ARGs).However,more information on proliferation of ARGs and metal resistance genes(MRGs)in mariculture system at the presence of microplastics is *** study used metagenomic analysis to investigate the distribution of ARGs and MRGs in water and microplastics of a typical mariculture *** 18 types including 174 subtypes of ARGs were detected with the total relative abundances of 1.22/1.25 copies per 16S rRNA copy for microplastics/*** resistance genes were the dominant ARGs with the abundance of 0.35/0.42 copies per 16S rRNA copy for microplastics/*** intI1 was dominant gene among 6 detected mobile genetic elements(MGEs)with the abundance of 75.46/68.70 copies per 16S rRNA copy for water/*** 9 types including 46 subtypes of MRGs were detected with total abundance of 5.02×10^(2)/6.39×10^(2)copies per 16S rRNA copy for water/microplastics while genes resistant to copper and iron served as the dominant ***,Bacteroidetes,and Actinobacteria accounted for 84.2%/89.5%of total microbial community in microplastics/*** with relatively high abundance were significantly positively related to major genera,MGEs,and *** in mariculture system could enrich most of MRGs and some ARGs to serve as potential reservoir for these *** findings of this study will provide important information on resistance gene pollution at presence of microplastics in the mariculture system for further proposing suitable strategy of environmental management.

关键词： Antibiotic resistance genes Metal resistance genes Metagenomic analysis Microplastics Mariculture

A one-dimensional strain-rate based model for soft structured clays

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Science China(Technological Sciences) 2012年第1期55卷 90-100页

作者： YIN ZhenYu wang jianhua Center for Marine Geotechnics Research Department of Civil Engineering Shanghai Jiao Tong University Shanghai 200240 China

The paper aims to investigate the destructuration effect on the time-dependent behaviour of soft structured *** coupled with destructuration is analysed based on experimental observations.A strain-rate based model is developed to de-scribe the mechanical behaviour for both unstructured and structured clays under one-dimensional *** advantage of the proposed model lies in the determination of model parameters in a straightforward way,which leads to an easy use of the model for practical *** with consolidation,the model is used to simulate oedometer tests at constant rate of strain and long-term creep oedometer tests on two structured *** comparisons between predicted and measured results demonstrate that the proposed model can reasonably describe the effect of destructuration on the time-dependent behaviour of soft structured clay under one-dimensional *** the model is proposed for one-dimensional analysis,it can be a good base for developing a more general 3D model.

关键词： structured clays viscoplasticity consolidation creep strain.rate destructuration

A continental slope stability evaluation in the Zhujiang River Mouth Basin in the South China Sea

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Acta Oceanologica Sinica 2014年第11期33卷 155-160页

作者： LIU Ke wang jianhua State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Geotechnical Engineering Institute Tianjin University College of Mining Engineering Hebei United University

In nature, a slope stability is determined by the ratio of a sliding resistance to a slide force. The slide force of a marine deep-water continental slope is mainly affected by sediment mechanics properties, a topography, and a marine seismic. However, the sliding resistance is mainly affected by sedimentary patterns and a sedimentary stress history. Both of these are different from case to case, and their impact can be addressed when the data are organized in a geographic information system（GIS）. The study area on the continental slope in Zhujiang River Mouth Basin in South China Sea provides an excellent opportunity to apply GIS spatial analysis technology for the evaluation of the slope stability. In this area, a continental slope topography and a three-dimension（3-D） topography mapping show a sea-floor morphology and the distribution of a slope steepness in good detail, and the sediment analysis of seabed samples and an indoor appraisal reveals the variability of a sediment density near the sea-floor surface. On the basis of the results of nine geotechnical studies of submarine study areas, it has worked out that an equivalent cyclic shear stress ratio is roughly between 0.158 and 0.933, which is mainly depending on the initial water content of sediment. A regional density, slope and level of anticipated seismic shaking information are combined in a GIS framework to yield a map that illustrates a continental slope stability zoning under the influencing factors in Zhujiang River Mouth Basin in the South China Sea. The continental slope stability evaluation can contribute to north resources development in the South China Sea, the marine functional zoning, the marine engineering construction and adjust measures to local conditions, at the same time also can provide references for other deep-water slope stability analysis.

关键词： South China Sea continental slope stability geographic information system evaluation

Recent advances in flow-based sample pretreatment for the determination of metal species by atomic spectrometry

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Chinese Science Bulletin 2013年第18期58卷 1992-2002页

作者： YU YongLiang wang jianhua Department of Chemistry College of SciencesNortheastern University Research Center for Analytical Sciences College of SciencesNortheastern University

During the last few years,various flow-based separation/preconcentration methodologies have gained pertinent novel advances and exhibited powerful capability in the field of sample pretreatment and their hyphenation with detection by atomic *** present mini-review presents and discusses the progress of flow-based sample processing approaches commonly used for the assay of trace elemental species with detection by atomic spectrometry,including preliminary sample pretreatment,solid phase extraction(including solid phase microextraction),liquid-liquid extraction,vapor generation and dialysis *** emphasis has been paid on the novel applications and analytical procedures hyphenated with atomic *** future perspectives of flow-based sample pretreatment protocols in the determination of trace elements and their speciation are also discussed.

关键词：原子光谱法样品预处理测定品种金属样品处理方法光谱检测微量元素

Advanced nitrogen and phosphorus removal in A^(2)O-BAF system treating low carbon-to-nitrogen ratio domestic wastewater

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Frontiers of Environmental Science & Engineering 2011年第3期5卷 474-480页

作者： jianhua wang Yongzhen PENG Yongzhi CHEN Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering College of Environmental and Energy EngineeringBeijing University of TechnologyBeijing 100124China

A laboratory-scale anaerobic-anoxic-aerobic process(A^(2)O)with a small aerobic zone and a bigger anoxic zone and biologic aerated filter(A^(2)O-BAF)system was operated to treat low carbon-to-nitrogen ratio domestic *** A^(2)O process was employed mainly for organic matter and phosphorus removal,and for *** BAF was only used for nitrification which coupled with a settling tank Compared with a conventional A^(2)O process,the suspended activated sludge in this A^(2)OBAF process contained small quantities of nitrifier,but nitrification overwhelmingly conducted in *** the system successfully avoided the contradiction in sludge retention time(SRT)between nitrifying bacteria and phosphorus accumulating organisms(PAOs).Denitrifying phosphorus accumulating organisms(DPAOs)played an important role in removing up to 91%of phosphorus along with nitrogen,which indicated that the suspended activated sludge process presented a good denitrifying phosphorus removal *** average removal efficiency of chemical oxygen demand(COD),total nitrogen(TN),total phosphorus(TP),and NH_(4)^(+)-N were 85.56%,92.07%,81.24%and 98.7%*** effluent quality consistently satisfied the national first level A effluent discharge standard of *** average sludge volume index(SVI)was 85.4 mL·g^(-1)additionally,the volume ratio of anaerobic,anoxic and aerobic zone in A^(2)O process was also investigated,and the results demonstrated that the optimum value was 1:6:2.

关键词： Anoxic zone and biologic aerated filter(A^(2)OBAF)system domestic wastewater with low carbon-tonitrogen ratio advanced nitrogen and phosphorus removal denitrifying phosphorus removal

Salient object detection via region contrast and graph regularization

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Science China(Information Sciences) 2016年第3期59卷 46-59页

作者： Xingming WU Mengnan DU Weihai CHEN jianhua wang School of Automation Science and Electrical Engineering Beihang University

Detection of salient objects in an image is now gaining increasing research interest in computer vision community. In this study, a novel region-contrast based saliency detection solution involving three phases is proposed. First, a color-based super-pixels segmentation approach is used to decompose the image into regions. Second, three high-level saliency measures which could effectively characterize the salient regions are evaluated and integrated in an effective manner to produce the initial saliency map. Finally, we construct a pairwise graphical model to encourage that adjacent image regions with similar features take continuous saliency values, thus producing the more perceptually consistent saliency map. We extensively evaluate the proposed method on three public benchmark datasets, and show it can produce promising results when compared to 14state-of-the-art salient object detection approaches.

关键词： salient object detection region contrast region compactness global distinctness graph regular ization

Theory of annual runoff evolution under natural-artificial dual mode and case study of Wuding River basin on the middle Yellow River

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Science China(Technological Sciences) 2004年第z1期47卷 51-59页

作者： wang Hao wang Chengming wang jianhua ZHOU Zuhao CHEN Yiming Department of Water Resources China Institute of Water Resources and Hydropower Research Beijing 100044 China

Water cycling process in a river basin becomes more complicated because of the intensified impact by human activities. Study of the law of annual runoff evolution in a river basin is of great significance to quantitative analysis of the water resources condition in varied environment and prediction of the law of the water resources evolution in the future because year-based time span may best reflect the law of the water resources evolution driven by the nature and human activities in the river basin. This paper advances the theory of annual runoff evolution under natural-artificial dual mode based on the dual mode of the water resources evolution, and the theory is applied for the Wuding River Basin on the middle Yellow River as a case study. A thorough analysis of the precipitation-runoff relationship is made in the case of dynamic variation of ground surface conditions of the Wuding River basin, and the concept of water-soil conservation index area that indicates adoption of various measures for water and soil conservation to reflect ground surface conditions. Furthermore, precipitation-runoff empirical model is developed to reflect dynamic variation of the ground surface conditions of the river basin. The study may lay a solid foundation for the integrated theoretical platform of the law of the water resources evolution in the Yellow River basin and the dual model of the evolution.

关键词： annual runoff dual mode water resources variation evolution theory Wuding River.

A review of functional slit lamp biomicroscopy

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Eye and Vision 2019年第1期6卷 105-113页

作者： Xupeng Shu jianhua wang Liang Hu School of Ophthalmology and Optometry Wenzhou Medical UniversityWenzhou 325027China Bascom Palmer Eye Institute University of MiamiMiamiFloridaUSA

Functional slit lamp biomicroscopy(FSLB)is a novel device which consists of a traditional slit-lamp and a digital *** can quantitatively assess vessel diameter,blood flow velocity,and blood flow rate and can create noninvasive microvascular perfusion maps(nMPMs).At present,FSLB is mainly used in contact lens(CL)and dry eye disease(DED)studies to advance our understanding of ocular surface ***-derived blood flow and vessel density measures are significantly altered in CL wearers and DED patients compared to normal *** subtle changes in the ocular surface microcirculation may contribute to the monitoring of potential diseases of the body and provide a new way to diagnose dry eye ***,this may also indicate that FSLB can be more widely applied in the study of other diseases to reveal the relationship between changes in ocular surface microcirculation and systemic *** purpose of this paper is to summarize the functions of FSLB and the related studies especially in CL and DED.

关键词： Functional slit lamp biomicroscopy(FSLB) Conjunctival blood flow velocity Microvascular network density Contact lens Dry eye disease