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Energy mechanism of bolt supporting effect to fissured rock under static and dynamic loads in deep coal mines

International Journal of Mining Science and Technology 2024年第3期34卷 371-384页

作者： Deyuan Fan Xuesheng Liu Yunliang Tan Xuebin Li shenglong yang College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266590China National Energy Group Ningxia Coal Industry Co. Ltd.Yinchuan 753001China

The stability control of fissured rock is difficult,especially under static and dynamic loads in deep coal *** this paper,the dynamic mechanical properties,strain rate evolution and energy dissipation of fissured and anchored rocks were respectively obtained by SHPB *** was found that bolt can provide supporting efficiency-improving effect for fissured rock against dynamic disturbance,and this effect increased quadratically with decrease in anchoring ***,the energy dissipation mechanism of anchored rock was obtained by slipping ***,bolt energy-absorbing mechanism by instantaneous tensile-shear deformation was expressed based on material mechanics,which was the larger the anchoring angle,the smaller the energy absorption,and the less the contribution to supporting efficiency *** this basis,the functional relationship between energy dissipation of anchored rock and energy absorption of bolt was *** the coal-gangue separation system of Longgu coal mine as an example,the optimal anchoring angle can be determined as 57.5°–67.5°.Field monitoring showed fissured rock with the optimal anchoring angle,can not only effectively control the deformation,but also fully exert the energy-absorbing and efficiency-improving effect of bolt *** study provides guidance to the stability control and supporting design for deep engineering under the same or similar conditions.

关键词： Static and dynamic loads Anchored rock Energy absorption Anchoring angle Engineering verification

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The Potential Vertical Distribution of Bigeye Tuna (Thunnus obesus) and Its Influence on the Spatial Distribution of CPUEs in the Tropical Atlantic Ocean

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Journal of Ocean University of China 2020年第3期19卷 669-680页

作者： yang shenglong SONG Liming ZHANG Yu FAN Wei ZHANG Bianbian DAI yang ZHANG Heng ZHANG Shengmao WU Yumei College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China Key Laboratory of Oceanic and Polar Fisheries Ministry of AgricultureEast China Sea Fisheries Research InstituteChinese Academy of Fishery SciencesShanghai 200090China Key and Open Laboratory of Remote Sensing Information Technology in Fishing Resource East China Sea Fisheries Research InstituteChinese Academy of Fishery SciencesShanghai 200090China

Understanding the potential vertical distribution of bigeye tuna(Thunnus obesus) is necessary to understand the catch rate fluctuations and the stock assessment of bigeye tuna. To characterize the potential vertical distribution of this fish while foraging and determine the influences of the distribution on longline efficiency in the tropical Atlantic Ocean, the catch per unit effort(CPUE) data were compiled from the International Commission for the Conservation of Atlantic Tunas and the Argo buoy data were downloaded from the Argo data center. The raw Argo buoy data were processed by data mining methods. The CPUE was standardized by support vector machine before analysis. We assumed the depths with the upper and lower limits of the optimum water temperatures of 15℃ and 9℃ as the preferred swimming depth, while the lower limit of the temperature(12℃) associated with the highest hooking rate as the preferred foraging depth(D12) of bigeye tuna during the daytime in the Atlantic Ocean. The preferred swimming depth and foraging depth range in the daytime were assessed by plotting the isobath based on Argo buoy data. The preferred swimming depth and vertical structure of the water column were identified to investigate the spatial effects on the CPUE by using a generalized additive model(GAM). The empirical cumulative distribution function was used to assess the relationship between the spatial distribution of CPUE and the depth of 12℃ isolines and thermocline. The results indicate that 1) the preferred swimming depth of bigeye tuna in the tropical Atlantic is from 100 m to 400 m and displays spatial variation;2) the preferred foraging depth of bigeye tuna is between 190 and 300 m and below the thermocline;3) the number of CPUEs peaks at a relative depth of 30 –50 m(difference between the 12℃ isolines and the lower boundary of the thermocline);and 4) most CPUEs are within the lower depth boundary of the thermocline levels(LDBT) which is from 160 m to 230 m. GAM analysis i

关键词： CPUE Argo buoy data Thunnus obesus vertical distribution generalized additive model Atlantic Ocean

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Rheological mechanical properties and its constitutive relation of soft rock considering influence of clay mineral composition and content

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International Journal of Coal Science & Technology 2023年第4期10卷 62-76页

作者： Xuebin Li Xuesheng Liu Yunliang Tan Ai Chen Honglei Wang Xin Wang shenglong yang College of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Mining Disaster Prevention and Control Shandong University of Science and TechnologyQingdao 266590China Ningxia Coal Industry Co. Ltd.of China Energy GroupYinchuan 750000China Badong National Observation and Research Station of Geohazards China University of GeosciencesWuhan 430074China

Rheological mechanical properties of the soft rock are afected signifcantly by its main physical characteristics-clay *** this study,taking the mudstone on the roof and foor in four typical mining regions as the research object,frstly,the clay mineral characteristic was analyzed by the X-ray difraction ***,rheological mechanical properties of mudstone samples under diferent confning pressures are studied through triaxial compression and creep *** results show that the clay mineral content of mudstone in diferent regions is diferent,which leads to signifcant diferences in its rheological properties,and these diferences have a good correlation with the content of montmorillonite and illite-montmorillonite mixed *** the montmorillonite content as an example,compared with the sample with 3.56%under the lower stress level,the initial creep deformation of the sample with 11.19%increased by 3.25 times,the viscosity coefcient and longterm strength decreased by 80.59%and 53.94%,***,based on the test results,the damage variation is constructed considering the montmorillonite content and stress level,and the M–S creep damage constitutive model of soft rock is ***,the test results can be ftted with determination coefcients ranging from 0.9020 to 0.9741,which proves that the constitutive relation can refect the infuence of the clay mineral content in the samples *** study has an important reference for revealing the long-term stability control mechanism of soft rock roadway rich in clay minerals.

关键词： Clay mineral Physical characteristic Creep Damage Constitutive model

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Regulating local chemical environment in O_(3)-type layered sodium oxides by dual-site Mg^(2+)/B^(3+)substitution achieves durable and high-rate cathode

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Chinese Chemical Letters 2024年第9期35卷 469-474页

作者： Guangchang yang shenglong yang Jinlian Yu Yishun Xie Chunlei Tan Feiyan Lai Qianqian Jin Hongqiang Wang Xiaohui Zhang Guangxi Key Laboratory of Low Carbon Energy Materials Guangxi New Energy Ship Battery Engineering Technology Research CenterGuangxi Scientific and Technological Achievements Transformation Pilot Research Base of Electrochemical Energy Materials and DevicesSchool of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China College of Materials and Chemical Engineering Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive UtilizationHezhou UniversityHezhou 542899China School of Civil Engineering and Architecture Center for the Structure of Advanced MatterSchool of Electronic EngineeringGuangxi University of Science and TechnologyInstitute of New Building Materials and Engineering ApplicationsLiuzhou 545006China

The O_(3)-Na_(0.85)Ni_(0.2)Fe_(0.4)Mn_(0.4)O_(2)layered oxide cathode material possesses the advantages of high specific capacity,low cost,and simple ***,sluggish kinetics and complicated phase transition caused by the large size difference between Na+and tetrahedral gaps lead to poor rate and cycling ***,a scalable and feasible strategy was proposed to modulate local chemical environment by introducing Mg^(2+)and B^(3+)into O_(3)-Na_(0.85)Ni_(0.2)Fe_(0.4)Mn0.4O_(2),which can distinctly improve kinetic transport rate as well as electrochemical *** capacity retention of O_(3)-(Na_(0.82)Mg_(0.04))(Ni_(0.2)Fe_(0.4)Mn_(0.4))B_(0.02)O_(2)(NFMB)increases from 43.3%and 12.4%to 89.5%and 89.0%at 1 C and 3 C after 200 cycles,***,the electrode still delivers high rate capacity of 93.9 mAh/g when current density increases to 10 ***^(2+)ions riveted on Na layer act as a“pillar”to stabilize crystal structure and inhibit structural change during the desodiumization process.B^(3+)ions entering tetrahedral interstice of the TM layer strengthen the TM-O bond,lower Na+diffusion energy barrier and inhibits the slip of TM ***,the assembled full batteries with the modified cathode material deliver a high energy density of 278.2Wh/kg with commercial hard carbon as *** work provides a strategy for the modification of high-performance SIB layered oxide materials to develop the next-generation cost-effective energy storage grid systems.

关键词： Sodium-ion batteries Layered cathode material DFT calculation Local chemistry environment Magnesium/boron co-substitution

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Spatial-Temporal Change of Phytoplankton Biomass in the East China Sea with MODIS Data

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Journal of Ocean University of China 2021年第2期20卷 454-462页

作者： WU Yumei ZHU Haopeng DANG Xiaoyan CHENG Tianfei yang shenglong WANG Lin HUANG Liangmin CUI Xuesen Key Laboratory of Oceanic and Polar Fisheries Ministry of AgricultureShanghai 200090China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China Scientific Observing and Experimental Station of Fishery Remote Sensing Ministry of AgricultureBeijing 100141China Resources and Eco-Environmental Research Center Chinese Academy of Fishery ScienceBeijing 100141China Key and Open Laboratory of Remote Sensing Information Technology in Fishing Resource East China Sea Fisheries Research InstituteChinese Academy of Fishery SciencesShanghai 200090China Jimei University Fujian Provincial Key Laboratory of Marine Fishery Resources and Eco-EnvironmentXiamen 361021China

A ten-year chlorophyll-a concentration dataset from Moderate Resolution Imaging Spectro-radiometer(MODIS) were used to analyze the variation of phytoplankton biomass and its potential relation with climate in the East China Sea. The result indicated that the phytoplankton biomass generally had a regular pattern every year, and phytoplankton bloom mainly occurred between May and July. The highest phytoplankton biomass appeared near the yangtze River Estuary. The lowest phytoplankton biomass located near the Taiwan Strait. In general, the starting bloom time was earlier in the south than in the north, and the span time of the former was also longer. During the recent ten years, the phytoplankton biomass around the yangtze River Estuary decreased obviously. The change of phytoplankton biomass was found to be related with the Ni?o3.4 Index. The correlation between the intensity of phytoplankton bloom with the number and square of red tide were 0.63 and 0.74, respectively.

关键词： chlorophyll-a concentration phytoplankton change climate East China Sea

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A three-dimensional biomimetic microfluidic chip to study the behavior of hepatic stellate cell under the tumor microenvironment

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Chinese Chemical Letters 2023年第3期34卷 222-225页

作者： Jingjing Kuang Wei Sun Min Zhang Lu Kang shenglong yang Hongyang Zhang Yuerong Wang Ping Hu Shanghai Key Laboratory of Functional Materials Chemistry School of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Engineering Research Centre of Pharmaceutical Process Chemistry Ministry of EducationSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China

In this paper, we designed a three-dimensional cell co-cultured microfluidic chip, which generated interstitial flow and oxygen gradient to simulate the complex tumor microenvironment. It consisted of five parallel cell culture channels and one hypoxic channel. These channels were constructed for the culture of mouse liver tumor cells(Hepa1-6), mouse liver stellate cells(JS-1), the simulation of extracellular matrix, complex biochemical factors(hypoxia and interstitial flow), and the supply of cellular nutrients. The 3D-interstitial flow-hypoxia model was used to study the behavior of JS-1 cells under the effect of tumor microenvironment(TME). The results showed that by co-cultured with Hepa1-6 cells, hypoxia of Hepa1-6 cells, and adding TGF-β1 by interstitial flow, the migration of JS-1 cells could be promoted. Similarly,activated JS-1 cells could led to the epithelial-mesenchymal transformation in co-cultured Hepa1-6 cells,which secreted more TGF-β 1.

关键词： Interstitial flow Hypoxia Microfluidic Tumor microenvironment Behavior

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Development of nutritious rice with high zinc/selenium and low cadmium in grains through QTL pyramiding

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Journal of Integrative Plant Biology 2020年第3期62卷 349-359页

作者： Chaolei Liu Shilin Ding Anpeng Zhang Kai Hong Hongzhen Jiang shenglong yang Banpu Ruan Bin Zhang Guojun Dong Longbiao Guo Dali Zeng Qian Qian Zhenyu Gao State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China

Enriching zinc(Zn) and selenium(Se) levels,while reducing cadmium(Cd) concentration in rice grains is of great benefit for human diet and *** natural variations in grain Zn, Se, and Cd concentrations in different rice accessions enable Zn/Sebiofortification and Cd-minimization through molecular breeding. Here, we report the development of new elite varieties by pyramiding major quantitative trait loci(QTLs) that significantly contribute to high Zn/Se and low Cd accumulation in grains. A chromosome segment substitution line CSSLGCC7 with the PA64s-derived GCC7 allele in the 93-11 background, exhibited steadily higher Mn and lower Cd concentrations in grains than those of 93-11. This elite chromosome segment substitution line(CSSL) was used as the core breeding material to cross with CSSLs harboring other major QTLs for essential mineral elements, especially CSSLGZC6 for grain Zn concentration and CSSLGSC5 for grain Se concentration. The CSSLGCC7+GZC6 and CSSLGCC7+GSC5 exhibited lower Cd concentration with higher Zn and Se concentrations in grains, respectively. Our study thus provides elite materials for rice breeding targeting high Zn/Se and low Cd concentrations in grains.

关键词： elite breeding pyramid

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Identification of QTLs for Cadmium Tolerance During Seedling Stage and Validation of qCDSL1 in Rice

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Rice science 2021年第1期28卷 81-88页

作者： Ding Shilin Liu Chaolei Shang Lianguang yang shenglong Zhang Anpeng Jiang Hongzhen Ruan Banpu Fang Guonan Tian Biao Ye Guoyou Guo Longbiao Qian Qian Gao Zhenyu Root Biology Center College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China Agricultural Genomics Institute Chinese Academy of Agricultural SciencesShenzhen 518120China Strategic Innovation Platform International Rice Research InstituteDAPO Box 7777Metro Manilathe Philippines

Cadmium(Cd)is a non-essential toxic metal that is harmful to *** investigate the genetic mechanism of Cd tolerance in rice,quantitative trait loci(QTLs)associated with Cd tolerance at the seedling stage were analyzed using a recombinant inbred line(RIL)population derived from a cross between PA64s and 93-11.A total of 36 QTLs associated with shoot length,root length,shoot dry weight,root dry weight and total dry weight were detected in Hangzhou and Lingshui of *** them,15 QTLs were identified under the control condition and 15 QTLs were identified under the Cd stress condition,and 6 QTLs for Cd tolerant coefficient were detected on chromosomes 1,3,7 and *** qCDSL1.1 and qCDSL1.2 were identified in Hangzhou and Lingshui,respectively,and had overlapping intervals on chromosome *** further confirm the effects of qCDSL1.1 and qCDSL1.2,we developed a chromosome segment substitution line(CSSL),CSSLqCDSL1,in 93-11 background harboring qCDSL1.1/qCDSL1.2 from *** to 93-11,CSSLqCDSL1 had increased shoot length under the Cd stress *** results pave the way for further isolation of those genes controlling Cd tolerance in rice and marker-assistant selection of rice elite varieties with Cd tolerance.

关键词： cadmium tolerance recombinant inbred line qCDSL1 rice quantitative trait locus

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Characteristics of the Fish Assemblage in the Intertidal Salt Marsh and Mudflat of the yangtze Estuary

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Open Journal of Marine Science 2019年第1期9卷 49-63页

作者： Heng Zhang Jingyu Ye Xuehui Wang shenglong yang East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Shanghai China Key Laboratory of Open-Sea Fishery Development Ministry of Agriculture Guangzhou China College of Marine Sciences Shanghai Ocean University Shanghai China State Key Laboratory of Estuarine and Coastal Research Shanghai China

During July 2015 to June 2016, two permanent sampling sites were established in Scirpus mariqueter salt marsh and its adjacent mudflat on the intertidal zone of Chongming-Dongtan in the yangtze Estuary. Based on monthly trap net surveys of fishes, the characteristics of the fish assemblages in the different subhabitats, including the salt marsh and mudflat, and the monthly variations were analyzed. A total of 19 species of fishes were found belong to 12 Families. The characteristics including the dominant fish species were different in these two subhabitats. 18 species of fish were recorded in the mudflat, of which the dominant species were the Coilia ectenes, Pelteobagrus nitidus and Lateolabrax maculatus. Ten species of fish were recorded in the salt marsh of which the dominant species were the Coilia ectenes, Saurogobio dumerili, Liza haematocheila, Lateolabrax maculatus and Acanthogobius ommaturus. Pelteobagrus nitidus prefers to use the mudflat, while Lateolabrax maculatus and Liza haematocheila prefer to use the salt marsh. There was a significant difference in the monthly variation of fish abundance between the fish abundance of salt marsh and mudflat, while there was no significant difference in fish biomass. The Simpson index of the fish of the mudflat was significantly higher than that of the salt marsh, while the Margalef index and the Pielou index were lower than the salt marsh. The community can be divided into two groups: winter-spring (A) and summer-autumn (B). The abundance of fish in the mudflat and the salt marsh show a very significant correlation with the water temperature (r = 0.773, 0.830, respectively) and a significant correlation with the water salinity(r = 0.654, 0.648, respectively). The abundance of fish in mudflat and salt marsh are both significantly correlated with water temperature and salinity. The abundance of fish of the mudflat (r = 0.470, P > 0.05) is more related to the highest submerged depth than of the salt marsh (r = 0.087,

关键词： yangtze Estuary Intertidal Zone Subhabitat Fish Assemblage Species Richness

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Thermocline Model for Estimating Argo Sea Surface Temperature Thermocline Model for Estimating Argo Sea Surface Temperature

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Sustainable Marine Structures 2022年第1期4卷 1-12页

作者： Chunling Zhang Mengli Zhang Zhenfeng Wang Song Hu Danyang Wang shenglong yang College of Marine Science Shanghai Ocean UniversityShanghai201306China Project Management Office of China National Scientific Seafloor Observatory Tongji UniversityShanghai200092China Key Laboratory of East China Sea&Oceanic Fishery Resources Exploitation and Utilization Ministry of AgricultureShanghai200090China

Argo has become an important constituent of the global ocean observation ***,due to the lack of sea surface measurements from most Argo profiles,the application of Argo data is still *** this study,a thermocline model was constructed based on three key thermocline parameters,i.e,thermocline upper depth,the thermocline bottom depth,and thermocline temperature *** the model,we estimated the sea surface temperature of Argo profiles by providing the relationship between sea surface and subsurface *** tested the effectiveness of our proposed model using statistical analysis and by comparing the sea surface temperature with the results obtained from traditional methods and in situ observations in the Pacific *** root mean square errors of results obtained from thermocline model were found to be significantly reduced compared to the extrapolation results and satellite retrieved temperature *** correlation coefficient between the estimation result and in situ observation was *** surface temperature,estimated by the thermocline model,has been theoretically proved to be ***,our model generates theoretically feasible data present the mesoscale phenomenon in more ***,this study compensates for the lack surface observation of Argo,and provides a new tool to establish complete Argo data sets.

关键词： Argo Sea surface temperature Thermocline model The Pacific Ocean

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