检索结果-南通市图书馆

Estimation of the Scale of Artificial Reef Sets on the Basis of Underwater 3D Reconstruction

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2021年第5期20卷 1195-1206页

作者： tang yanli ZHANG Zuhao WANG Xinxin Department of Fisheries College Ocean University of ChinaQingdao 266003China

The creation of three-dimensional models from an unorganized set of points is an active research area in computer *** of the purposes of this study is to explore the 3D reconstruction of a cube-type artificial reef(CTAR)set by linear structured light and binocular stereo vision technology in an underwater *** experimental setup is composed of two ca-meras in a stereo vision *** alpha shapes method can be used to construct a surface that most closely reflects the arti-ficial reef set described by the points.A parameter study is conducted to assess the scales of the set(i.e.,usable volume,surface area,projected area,height,and base diameter)on the basis of 3D *** results show that the quality of 3D recon-struction in an underwater environment is acceptable for estimating the scale size of the CTAR *** to the measurement of the scale sizing of the CTAR set,the relationships between the parameters of the CTAR set and the number of CTAR modules were ***,the usable volume of the CTAR set can be estimated depending on the basis of the number of CTAR modules.

关键词： cube-type artificial reef structured light binocular stereo vision three-dimensional reconstruction alpha shapes method

Distribution Characteristics of Fat Greenling(Hexagrammos otakii) Inhabiting Artificial Reefs Around Qiansandao Island, Haizhou Bay, China

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2019年第5期18卷 1227-1234页

作者： WANG Xinmeng SUN Peng tang yanli LIANG Zhenlin College of Fisheries Ocean University of ChinaQingdao 266003China Marine College Shandong UniversityWeihai 264209China

Chinese government has provided vigorous financial supports to artificial reef(AR)projects to repair marine *** AR,an important AR project of Fishery Resource Restoration Program in Shandong Province,was built during 2002 to *** has enhanced the local fishery harvest and generated positive economic *** greenling(Hexagrammos otakii)is a major commercial reef fish in Qiansandao with high economic *** distribution characteristics need to be further *** this research,we studied the potential influence of environmental variables and distance from ARs on catch per unit effort(CPUE)and body length of fat *** results showed that the average body length of fat greenlings distributed within 10 m from ARs was longer than that of fat greenlings distributed more than 600 m away from *** length also increased with the increased salinity,while it declined as temperature *** probability of the presence of fat greenling increased when temperature was below 20℃,then it slightly *** decreased as the distance *** results elucidate the potential effects of environmental variables and distance from ARs on the distribution of fat greenling,which may also be helpful to the distribution research of other reef fish species.

关键词： Hexagrammos otakii spatial distribution distance environmental predictor artificial reef

Cationic Conjugated Oligomers for Efficient and Rapid Antibacterial Photodynamic Therapy via Both Type Ⅰ and Type Ⅱ Pathways

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第1期42卷 61-66页

作者： Huan Wang Shuwen Guo Qiong Yuan Meiqi Li yanli tang Country Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province Key Laboratory of Applied Surface and Colloid ChemistryMinistry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'anShaanxi 710119China

Recently,photodynamic therapy(PDT)has attracted wide attention due to its less susceptibility to drug resistance,broad-spectrum biocidal activity and biosafety in normal ***,the traditional photosensitizers(Ps)face the disadvantage of poor therapeutic efficacy due to the requirement of an aerobic environment to generate ^(1)O_(2) through Type Ⅱ ***,we designed and synthesized a novel cationic conjugated oligomer oligo(phenylene vinylene)(OPV)and studied its antibacterial photodynamic activity against both Gram-negative Escherichia coli(***)and Gram-positive bacteria methicillin-resistant Staphylococcus aureus(MRSA).Importantly,the OpV can rapidly produce reactive oxygen species(ROs)through double pathways,Type Ⅰ and Ⅱ mechanism under white light irradiation,and efficiently kill *** and MRSA at a nanomolar *** dual type photosensitizing capability makes OPV promising for enhanced PDT to treat pathogens and tumors in complex environments.

关键词： Conjugated oligomers Antibacterial photodynamic therapy Oligo(phenylene vinylene) Reactive oxygen species Typelandll pathways

Experimental Investigation of Local Scour Around Artificial Reefs in Steady Currents

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第2期21卷 445-456页

作者： tang yanli WEI Shuangwu YANG Mingda WANG Xinxin ZHAO Fenfang Fisheries College Ocean University of ChinaQingdao 266003China

Artificial reef is a man-made object that is deployed purposefully on the seafloor to restore the offshore fishery resources and the ecological *** secure its ecological effects,it is important to study the possible instability of artificial reefs,like drifting and reversing caused by burial and scour in different seafloor *** the present study,experiments of local scour around an artificial reef are carried out in steady *** effect of the open-area ratios and the open-hole heights of the cubic reefs,and the bottom angles of the triangular reefs on the time-scale of the scour process and the equilibrium scour depth are *** results indicate that for the cubic artificial reef,the scour depth decreases with the increasing open-area ratios,and increases with the increasing open-hole *** the present study,the optimal prototype of the cubic reef with an open-area ratio of 0.49 and open-height of 0.7 m produces the minimum scour *** the triangular reef,the scour depth increases when the bottom angle ***,based on the experimental results,empirical equations of the effects of the cut-opening and the bottom angle on the maximum equilibrium scour depth are *** formulas will provide theoretical support and practical guidance for the optimized design and construction of artificial reefs.

关键词： local scour artificial reefs open-area ratios open-hole heights bottom angles

Comparison of 16S rRNA Gene Primers on Studying Microbial Community Composition in Bottom Water and Sediment of Artificial Reefs in Laoshan Bay, China

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第5期21卷 1313-1322页

作者： FANG Guangjie YU Haolin SHENG Huaxiang tang yanli LIANG Zhenlin Fisheries College Ocean University of ChinaQingdao 266003China Marine College Shandong UniversityWeihai 264200China

Marine microorganisms are indispensable regulators of nutrient cycling and energy flow,which are crucial for artificial reefs(ARs)***,little is known about the microbial communities in the bottom water and sediment of *** of microbial diversities have greatly advanced due to the development of high-throughput sequencing technologies,whereas the results may vary significantly due to the primers’*** study investigated the influences of two 16S ribosomal RNA gene primer choices(V4 and V3-V4)on microbial community compositions and *** results showed that the taxonomic assignment de-tected by primer V3-V4 was higher compared with that obtained by primer V4,whereas microbial community compositions had strong correlations between the two *** beta diversities of ARs can be uncovered by both primers,but the relation-ships between communities and environmental parameters were *** performances of the two primers for water samples were highly consistent,but the inconformity was evident for sediment *** the relatively lower taxonomic classification of primer V4 for sediment samples,primer V3-V4 was recommended for later *** the development and advancement of ARs in China,our findings provide a meaningful reference for ecologists focusing on the microbial diversities and ecological functions of these artificial habitats in the future.

关键词： 16S rRNA hypervariable region ARs bacteria archaea

Influence of Spatial-Temporal and Environmental Factors on Larimichthys polyactis, Octopus variabilis, and Species Aggregated Set-Net CPUEs in Haizhou Bay, China

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2018年第4期17卷 973-982页

作者： tang yanli MA Shuyang LIU Changdong WANG Xinmeng CHENG Shasha Fisheries Technology Laboratory College of Fisheries Ocean University of China

Set-nets are common alongshore fishing gear used in Haizhou Bay, which rely on flow to catch fish. The catch per unit effort(CPUE) of set-net is affected by spatial-temporal and environmental factors but no research has been conducted on this subject. In this study, we used generalized additive models(GAMs) to explore the influence of spatial-temporal and environmental factors on CPUEs of species aggregated, small yellow croaker(Larimichthys polyactis), and octopus(Octopus variabilis) based on logbooks investigations conducted at 4 stations in an alongshore area of Haizhou Bay from 2011 to 2012. The results showed that all CPUEs exhibited significant spatial-temporal differences at various scales. Aggregated CPUE was high when the sea surface temperature(SST) was 15-18℃ and 20-23℃, which was mainly determined by life history traits of the octopus and small yellow croaker(optimal SSTs 14-17℃ and 19-24℃, respectively). Chlorophyll-a concentration had significant influences on the aggregated, small yellow croaker and octopus CPUEs at optimal ranges of 3.8-6.2 mg m^(-3), 4.2-4.8 mg m^(-3) and 4.5-5.5 mg m^(-3), respectively. Flow through the net had positive relationships with CPUEs. The approximate logarithmic trends in regression curves had a critical point of 2.5 Mm^3 d^(-1), which was the dividing point that differentiated whether the major factor affecting CPUEs was the flow velocity or the fishery resource. Our results from this study will help guide fishery production and improve catch rate of set-net fishing in Haizhou Bay.

关键词： spatial-temporal environmental factors set-net small yellow croaker octopus generalized additive models Haizhou Bay

Relationships Between Community Structure and Environmental Factors in Xixiakou Artificial Reef Area

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2020年第4期19卷 883-894页

作者： YU Haolin YANG Wenzhao LIU Changdong tang yanli SONG Xiefa FANG Guangjie College of Fisheries Ocean University of ChinaQingdao 266003China

The construction of artificial reefs has unparallelly developed for a few decades in *** reefs can be used to manage and conserve commercially exploited fish and ***,their suitability as ecological niche is poorly ***,in this study,we detected the seasonal variation of community biodiversity and the corresponding driving environmental *** also explored the relationships between dominant species and environmental factors to identify appropriate ecological niche *** statistical analysis methods were used to assess species distribution within an artificial reef area in Xixiakou during nine sampling events in four seasons between 2017 and ***-metric multidimensional scaling(NMDS)and cluster analysis results indicated that the components of community can be divided into two *** of community,which is exhibited by species number,biodiversity,and catch per unit effort(CPUE),was significantly higher in summer than in other *** additive model(GAMs)results revealed the significant effects of temperature and chlorophyll a on the community *** schlegelii,Hexagrammos otakii,Conger myriaster and Charybdis japonica were the dominant species in four *** results indicated that temperature,dissolved oxygen(DO),pH and chlorophyll a affect the CPUE of dominant species *** distinct suitable ecological niche for each dominant species was found in this *** example,Charybdis japonica preferred to live in the area with 20.7–22.1℃,dissolved oxygen 7.07–7.15 mg L−1 and salinity 31.8–*** results of this study are beneficial to resource conservation and fishery management.

关键词： artificial reef community structure dominant species distribution ecological niche

Studies on Factors Influencing Hydrodynamic Characteristics of Plates Used in Artificial Reefs

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2019年第1期18卷 193-202页

作者： tang yanli YANG Wenzhao SUN Liyuan ZHAO Fenfang LONG Xiangyu WANG Gang College of Fishery Ocean University of China Shandong Hydrobios Resources Conservation and Management Center

As a simplified model of artificial reefs, a series of plate models punched with square or circular openings are designed to investigate the effects of openings on the hydrodynamic characteristics of artificial reefs. The models are grouped by various opening numbers and opening-area ratios. They are physically tested in a water flume or used in the numerical simulation to obtain the drag force in the uniform flow with different speeds. The simulation results are found in good agreement with the experimental measurements. By the non-dimensional analysis, the drag coefficient specified to each model is achieved and the effects of openings are examined. It is found that the key factor affecting the drag coefficient is the open-area ratio. Generally, the drag coefficient is a linear function of the open area ratio with a minus slope. The empirical formulae for the square and circular openings respectively are deduced by means of the multiple regression analysis based on the measured and numerical data. They will be good references for the design of new artificial reefs. As a result of numerical simulation, the vorticity contours and pressure distribution are also presented in this work to better understand the hydrodynamic characteristics of different models.

关键词： artificial reefs drag coefficient hydrodynamic characteristics model experiment

Significant Effects of Fishing Gear Selectivity on Fish Life History

在线全文

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2014年第3期13卷 467-471页

作者： LIANG Zhenlin SUN Peng YAN Wei HUANG Liuyi tang yanli College of Fisheries Ocean University of China Marine College Shandong University

Over the past few decades, extreme changes have occurred in the characters of exploited fish populations. The majority of these changes have affected the growth traits of fish life history, which include a smaller size-at-age, an earlier age-at-maturation and among others. Currently, the causes of these life history traits changes still require systematic analyses and empirical studies. The explanations that have been cited are merely expressed in terms of fish phenotypic adaptation. It has been claimed that the original traits of fish can be recovered once the intensity of exploitation of the fish is controlled. Sustained environmental and fishing pressure will change the life history traits of most fish species, so the fish individual's traits are still in small size-at-age and at earlier age-at-maturation in exploited fish populations. In this paper, we expressed our view of points that fishing gear has imposed selectivity on fish populations and individuals as various other environmental factors have done and such changes are unrecoverable. According to the existing tend of exploited fish individual's life history traits, we suggested further researches in this field and provided better methods of fishery management and thereby fishery resources protection than those available early.

关键词： size composition life history fishing gear selectivity fishery management