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The bedform morphology of Chinese sturgeon spawning sites in the Yangtze River

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International Journal of Sediment Research 2013年第3期28卷 421-429页

作者： Yu-jun YI shang-hong zhang Zhao-yin WANG Ministry of Education Key Laboratory of water and sediment Scienc Beijing Normal University State Key Joint Laboratory of Environment Simulation and Pollution Contro Beijing Normal University Renewable Energy School North China Electric Power University State Key Laboratory of Hydroscience and Engineering Department of Hydraulic EngineeringTsinghua University

Quantitative measures of the relationships between channel morphology and the habitat use of Chinese sturgeon(Acipenser sinensis) can help management and regulatory agencies to quantify potential spawning habitats and develop recovery goals in view of the decreasing area of sturgeon spawning *** study determined the specific bedform types at the pool-riffle scale and evaluated the slopes,aspects and bed load gradation composition of Chinese sturgeon spawning areas in the Yangtze River,China.A bedform differencing technique was used to objectively quantify the longitudinal riverbed profile into four distinct pool-riffle units that were independent of *** vertical location of thalweg points within these units was quantified with a riffle proximity *** sturgeon spawning areas were mapped and correlated with the pool-riffle units,slopes and *** results indicate that Chinese sturgeon spawning areas occur primarily in *** majority of Chinese sturgeon spawning occurred at elevations greater than 75%of the difference in elevation between the nearest riffle crest and the pool *** slope of spawning sites was distributed between 0.05 and 6.36,and the average aspects were 219.92 and 207.63,*** bed load is mainly composted of gravel and pebble,sediment diameter concentrated on *** analyses of bedform morphology will assist regional fish managers in quantifying existing and potential Chinese sturgeon spawning habitats and will provide a quantitative framework for evaluating general ecological implications of channel morphology in the Yangtze River.

关键词： Riverbed morphology Pool-riffle units Slope Aspect Chinese sturgeon

Crustal structure of northeastern Tibetan plateau and Ordos block:Waveform interpretation of the Maqen-Jingbian seismic refraction profile

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Earthquake Science 2009年第4期22卷 365-371页

作者： Fuyun Wang hong shang Xiankang zhang Geophysical Exploration Center China Earthquake Administration Zhengzhou 450002 China

The Maqen-Jingbian wide-angle seismic reflection and refraction experiment was carried out in 1998, which aims at determining detailed structure in the crust and top of the upper mantle and understanding structural relation between the northeastern Tibetan plateau and the Ordos block. The 1-D crustal models inferred by waveform inversion show strong variations in crustal structure, which can be classified into four different types： ① an Ordos platform with the Proterozoic crust and two high-velocity layers in the northeast section, ② a transitional crust between the northeastern Tibetan plateau and the Ordos block across the Haiyuan earthquake zone, ③ the Qilian orogenic zone in the central part, and ④ the Qinling orogenic zone in the southwestern section. The Moho depth increases from -42 km to -62 km from the NE part to the SW part of the profile. The crystalline crust consists of the upper crust and lower crust in northeastern Tibetan plateau. There is an obviously low P-wave velocity layer dipping northeastward, which is 12-13 km thick, at the bottom of the upper crust in Qinling orogenic zone and Haiyuan earthquake zone. The lower crust is characterized by alternating high and low P-wave velocity layers. Beneath Ordos block, i.e., the NE part of the profile, the crust shows quite a smooth increase in P-wave ve- locity down to the Moho at a depth of about 42 km.

关键词： crustal structure northeastern Tibetan plateau Ordos block waveform interpretation seismic refraction

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Total laparoscopic liver resection in 78 patients

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World Journal of Gastroenterology 2009年第45期15卷 5727-5731页

作者： Lei zhang Ya-Jin Chen Chang-Zhen shang hong-Wei zhang Ze-Jian Huang Department of Hepatobiliary Surgery Sun Yat-sen Memorial Hospital Sun Yat-sen University Guangzhou 510120 Guangdong Province China

AIM： To summarize the clinical experience of laparoscopic hepatectomy at a single center. METHODS： Between November 2003 and March 2009, 78 patients with hepatocellular carcinoma （n = 39）, metastatic liver carcinoma （n = 10）, and benign liver neoplasms （n = 29） underwent laparoscopic hepatectomy in our unit. A retrospective analysis was done on the clinical outcomes of the 78 patients. RESULTS： The lesions were located in segments Ⅰ （n = 3）, Ⅱ （n = 16）, Ⅲ （n = 24）, Ⅳ （n = 11）, Ⅴ （n = ii）, Ⅵ （n = 9）, and Ⅷ （n = 4）. The lesion sizes ranged from 0.8 to 15 cm. The number of lesions was three （n = 4）, two （n = 8） and one （n = 66） in the study cohort. The surgical procedures included left hemi-hepatectomy （n = 7）, left lateral lobectomy （n = 14）, segmentectomy （n = 11）, local resection （n = 39）, and resection of metastatic liver lesions during laparoscopic surgery for rectal cancer （n = 7）. Laparoscopic liver resection was successful in all patients, with no conversion to open procedures. Only four patients received blood transfusion （400-800 mL）. There were no perioperative complications, such as bleeding and biliary leakage. The liver function of all patients recovered within 1 wk, and no liver failure occurred. CONCLUSION： Laparoscopic hepatectomy is a safe and feasible operation with minimal surgical trauma. It should be performed by a surgeon with sufficient experience in open hepatic resection and who is proficient in laparoscopy.

关键词： Hepatectomy Laparoscopy Liver neoplasms

Effectiveness of urban distributed runoff model for discharge and water depth calculation in urban drainage pipe networks

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Journal of Hydrodynamics 2024年第3期36卷 582-591页

作者： Yang Zhou Yi-ling Leng Peng-yu Wang shang-hong zhang Yu-long Zhu Yu-jun Yi School of Water Resources and Hydropower Engineering North China Electric Power UniversityBeijing102206China State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing100875China

Effective urban land-use re-planning and the strategic arrangement of drainage pipe networks can significantly enhance urban flood defense *** at reducing the potential risks of urban flooding,this paper presents a straightforward and efficient approach to an urban distributed runoff model(UDRM).The model is developed to quantify the discharge and water depth within urban drainage pipe networks under varying rainfall intensities and land-use *** Nash efficiency coefficient of UDRM exceeds 0.9,which indicates its high computational efficiency and potential benefit in predicting urban *** prediction of drainage conditions under both current and re-planned land-use types is achieved by adopting different flood recurrence *** findings reveal that the re-planned land-use strategies could effectively diminish flood risk upstream of the drainage pipe network across 20-year and 50-year flood recurrence ***,in the case of extreme rainfall events(a 100-year flood recurrence),the re-planned land-use approach fell short of fulfilling the requirements necessary for flood disaster *** these instances,the adoption of larger-diameter drainage pipes becomes an essential requisite to satisfy drainage ***,the proposed UDRM effectively combines land-use information with pipeline data to give practical suggestions for pipeline modification and land-use optimization to combat urban ***,this methodology warrants further promotion in the field of urban re-planning.

关键词： Stormwater runoff water depth urban distributed runoff model urban drainage pipe networks urban land-use re-planning

Effects of carbon content on the microstructure and tensile properties of a low-density steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 391-401页

作者： Yongxuan shang Mingyu Fan Shuyong Jiang Zhongwu zhang Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationCollege of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China State Key Laboratory of Metal Material for Marine Equipment and Application Iron&Steel Research Institute of Ansteel Group CorporationAnshan 114009China

Carbon can change the phase components of low-density steels and influence the mechanical *** this study,a new method to control the carbon content and avoid the formation ofδ-ferrite by decarburization treatment was *** microstructural changes and mechanical characteristics with carbon content induced by decarburization were systematically ***-Jaoul(C-J)analysis was employed to examine the work hardening characteristics during the tensile *** decarburization by heat treatments,the carbon content within the austenite phase decreased,while Mn and Al were almost unchanged;this made the steel with full austenite transform into the austenite and ferrite dual ***,(Ti,V)C carbides existed in both matrix phase and the mole fraction almost the *** addition,the formation of other carbides *** loss induced a decrease in strength due to the weakening of the carbon solid *** the steel with the single austinite,the deformation mode of austenite was the dislocation planar glide,resulting in the formation of *** the dual-phase steel,the deformation occurred by the dislocation planar glide of austenite first,with the increase in strain,the cross slip of ferrite took place,forming dislocation cells in *** the late stage of deformation,the work hardening of austinite increased rapidly,while that of ferrite increased slightly.

关键词： low-density steels carbon content decarburization strengthening mechanisms work hardening behavior

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Correlation of folding energies of fragments of genomic sequences with their symmetry indexes

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Correlation of folding energies of fragments of genomic sequ...

Research and Practice on the Crustal Deformation Mobile Monitoring Network Layout in the Hydropower Station Reservoir Area

第五届全国生物信息学与系统生物学学术大会暨国际生物信息学前沿研讨会高通量时代的生物信息学与系统生物学

作者： Lei Wang Han-Qi Yang shang-hong zhang Key Laboratory of Gene Engineering of Ministry of Education and Biotechnology Research CenterSun Yat-sen University

Background:Strand symmetry,a ubiquitous phenomenon existing in all cellular genomes studied,is the marked similarity of the frequencies of oligonucleotides to those of their respective reverse complements within single strands of sufficiently long genomic *** is one of the major causes for the existence of two common profiles for genomic oligonucleotide frequencies(zhang and Wang,Genomics 2011,97:330-331).However,the riddle of strand symmetry is far from being *** of the hypotheses for its origin is the selection of stem-loop structures in single-stranded genomic *** our previous work has indicated that stem-loop potential of single-stranded genomic DNA would contribute little to strand symmetry for higher-order oligonucleotides(zhang and Huang,Bioinformatics 2010,26:478-485),its contribution to lower-order strand symmetry is not clear. Methods:We analyzed 90 representative prokaryotic genomes(including archaea and bacteria and with a wide range of GC content).Fragments of genomic sequences were obtained by a sliding window of various lengths(200 bp,500 bp,1000 bp and 5000 bp, respectively).We evaluated the stem-loop potential of fragments of genomic sequences in terms of folding energies(dG in kcal/mol) and calculated the symmetry indexes of the corresponding fragments for correlation analysis. Results:There is not an overall correlation pattern for the folding energies and symmetry *** coefficients of correlation may be positive or negative,and may be significant or *** addition,while symmetry indexes increase with the lengths of fragments of genomic sequences,their correlations with the corresponding folding energies usually decrease,especially for lower-order *** of the correlation analysis are in contradiction with the assumption of the stem-loop hypothesis. Conclusions:The contribution of local stem-loop potential of single-stranded genomic DNA to the formation and maintenance of strand symme

关键词： strand symmetry stem-loop potential folding energy genomic sequence

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Earthquake Research in China 2010年第3期24卷 320-334页

作者： shang hong Liu Tianhai zhang Jincheng zhang Chengqiang Yu Haisheng Sun Baicheng Yang Huaining Du Xiaoxia National Earthquake Response Support Service Beijing 100049 China

According to the construction project of the crustal deformation mobile monitoring network in the cascade hydropower stations built in the lower reaches of Jinsha River,this paper analyzes the design ideas and layout principles of crustal deformation mobile monitoring used in the monitoring of reservoir induced earthquakes. This paper introduces three types of monitoring networks used in the Xiluodu reservoir and Xiangjiaba reservoir, as well as the work already undertaken,in order to provide a kind of reference for the related engineering construction and comprehensive monitoring of reservoir induced earthquakes.

关键词： Jinsha River Hydropower station Reservoir induced earthquake Crustaldeformation monitoring

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Structural Modal Parameter Recognition and Related Damage Identification Methods under Environmental Excitations: A Review

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Structural Durability & Health Monitoring 2025年第1期19卷 25-54页

作者： Chao zhang shang-Xi Lai Hua-Ping Wang School of Civil Engineering and Mechanics Lanzhou UniversityLanzhou730000China Key Laboratory of Special Functional Materials and Structural Design Ministry of EducationLanzhou UniversityLanzhou730000China

Modal parameters can accurately characterize the structural dynamic properties and assess the physical state of the ***,it is particularly signiﬁcant to identify the structural modal parameters according to the monitoring data information in the structural health monitoring(SHM)system,so as to provide a scientiﬁc basis for structural damage identiﬁcation and dynamic model modiﬁ*** view of this,this paper reviews methods for identifying structural modal parameters under environmental excitation and brieﬂy describes how to identify structural damages based on the derived modal *** paper primarily introduces data-driven modal parameter recognition methods(e.g.,time-domain,frequency-domain,and time-frequency-domain methods,etc.),brieﬂy describes damage identiﬁcation methods based on the variations of modal parameters(e.g.,natural frequency,modal shapes,and curvature modal shapes,etc.)and modal validation methods(e.g.,Stability Diagram and Modal Assurance Criterion,etc.).The current status of the application of artiﬁcial intelligence(AI)methods in the direction of modal parameter recognition and damage identiﬁcation is further *** on the pre-vious analysis,the main development trends of structural modal parameter recognition and damage identiﬁcation methods are given to provide scientiﬁc references for the optimized design and functional upgrading of SHM systems.

关键词： Structural health monitoring data information modal parameters damage identiﬁcation AI method

Sequence-activated chemiluminescence probes: programmable illumination for high-contrast in vivo sensing and imaging

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Science China Chemistry 2025年第1期68卷 26-34页

作者： Yutao zhang Juan Li Wei-hong Zhu Zhiqian Guo shanghai Key Laboratory of Functional Materials Chemistry Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science and Technology State Key Laboratory of Bioreactor Engineering Shanghai Frontier Science Research Base of Optogenetic Techniques for Cell MetabolismEast China University of Science & Technology

Sequence-activated chemiluminescence(CL) technique offers a unique approach to detecting specific biomolecules or cellular events with high sensitivity and spatial resolution. The fundamental principle behind sequence-activated CL probes involves tailoring highly-controllable CL signals in response to specific sequences or events of interest, thus enabling high-contrast signals under complex physiological conditions. This sequential activation could be triggered by enzymes, reactive oxygen species(ROS), biothiols or changes in the microenvironment. These unique sequence-activated CL probes bestow several advantages, including minimal background, deep-tissue penetration, and the ability of non-invasive or minimally invasive detection. The sequence-activated CL techniques represent a significant advancement in molecular imaging and diagnostics. In this mini-review, we focus on the latest developments in sequential CL probes, addressing the technical challenges and discussing the future trajectory by harnessing CL signaling and molecular recognition.

关键词： chemiluminescnece sequence-activation in-vivo bioimaging cyclic peroxide