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Discovery of the Significant Impacts of Swell Propagation on Global Wave Climate Change

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Journal of Ocean University of China 2024年第3期23卷 594-604页

作者： ZHENG Chongwei Dalian Naval Academy Dalian 116018China Marine Resources and Environment research Group on the maritime silk road Dalian 116018China

This study compared the differences in the wave climate in the South China Sea and North Indian Ocean under these two datasets:ERA-40 wave reanalysis and Mei’s hindcast wave *** the numerical calculation of regional ocean waves,the wave climate characteristics exhibited significant bias if the influence of external swells(swells from afar)was not fully considered,which may provide an incorrect basis for global climate change analysis.1)The trends of the significant wave height(SWH)obtained from the two datasets showed significant differences,such as those of the Bay of Bengal and the Java Sea in *** the past 45 years,SWH from ERA-40(SWH-ERA)exhibited a significant annual increase in low-latitude waters of the North Indian Ocean(0.2-0.6 cm yr^(-1))and South China Sea(0.2-0.8 cm yr^(-1)).2)In the Bay of Bengal,the SWH-ERA in each month was generally 0.5 m higher than the SWH from Mei’s hindcast wave data(SWH-Mei)and can reach 1.0 m higher in some months.3)In the Bay of Bengal,SWH-ERA and SWH-Mei increased significantly at annual rates of 0.13 and 0.27 cm yr^(-1),*** increasing trend was mainly reflected after ***-ERA showed a trough in 1975(1.33 m)and a crest in 1992(1.83 m),which were not reflected in SWH-Mei.

关键词： wave climate climatic trend monthly variation annual variation external swell

A Detail Investigation on the Antarctic Wind Energy

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China Ocean Engineering 2023年第4期37卷 698-708页

作者： WANG Kai-shan WU Di ZHENG Chong-wei TAO Gui-sheng LI Wei GAO Yuan-bo YU Yue WU Kai Dalian Naval Academy Dalian 116018China Marine Resources and Environment research Group on the maritime silk road Dalian 116018China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

The scientific development of wind energy based on local conditions is conducive to the urgent energy demand and environmental protection of Antarctic *** this study,the ERA5 reanalysis data are used to evaluate the wind energy resources in the Antarctic region.A series of key indicators,such as wind power density,effective wind speed occurrence,energy level occurrence and stability,are comprehensively considered by using climate statistical analysis methods to analyze the temporal and spatial distribution characteristics of Antarctic wind energy *** results show that the Antarctic region contains abundant wind energy resources,which benefits the construction of scientific research *** superior areas are the Southern Ocean and the coast of the East Antarctica,followed by the Transantarctic Mountains,the coast of the Bellingshausen Sea and Amundsen *** areas have advantages in terms of wind power density(500-2500 W/m2),effective wind speed occurrence(80%-90%),energy level occur-rence(60%-90%)and stability(Cv:0.6-1,Mv:1.2-1.8,Sv:0.8-1.2).The Antarctic’s wind energy resources in wind power density,effective wind speed occurrence and energy level occurrence in autumn and winter are better than those in summer,while the coefficient of variation in summer is worse than that in autumn and winter.

关键词： Antarctic wind energy resource evaluation temporal and spatial characteristics

Expression of the Japanese oak silkworm Antheraea yamamai fibroin gene in the domesticated silkworm Bombyx mori

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Insect Science 2009年第6期16卷 465-473页

作者： Isao Kobayashi Katsura Kojima Hideki Sezutsu Keiro Uchino Toshiki Tamura Transgenic silkworm research center silk Materials research Unit National Institute of Agrobiological Sciences Ibaraki Japan

To understand the evolutionary conservation ofthe gene expression mechanism and secretion machinery between Antheraea and Bombyx fibroins, we introduced the genomic A. yamamai fibroin gene into the domesticated silkworm, B. mori. The spliced A. yamamai fibroin mRNA appeared only in the posterior region of the silk gland of the transgenic silkworm, suggesting that the functions of the fibroin promoter region and the splicing machinery are conserved between these two species. The A. yamarnai fibroin protein was detected in the lumen of the silk gland of the transgenic silkworm, albeit at lower levels compared with the B. mori-type fibroin. We found a strong degeneration of the posterior region of the silk gland of the transgenic silkworm. As a result, the cocoon shell weight was much lower in the transgenic silkworm than in the non-transgenic line. These results indicate that the promoter function and splicing machinery are well conserved between A. yamamai and B. mori but that the secretion mechanism of fibroin is diversified between the two.

关键词： Antheraea yamamai Bombyx mori evolution fibroin silk transgenic

Velocity and Sediment Concentration Profiles in Sediment-Laden Flows

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海洋工程：英文版 2004年第2期18卷 229-244页

作者：杨树清 Soon-Keat TAN Siow-Yong LIM maritime research center School of Civil and Environmental Engineering

A theoretical analysis of velocity profiles in sediment-laden flows is presented by means of Prandtl-Karman mixing length theorem. The study shows that the upward velocity of liquid-phase caused by settling sediment leads to the invalidity of the log-law and Rouse equation. The theoretical analysis takes into account the upward velocity and shows: 1) the mean velocity in sediment-laden flows follows the log-law, but the Karman constant reduces in the main flow region, 2) sediment concentration reduces the mixing length of fluid particles, 3) flow resistance reduces with the presence of sediment concentration, and 4) the sediment concentration profile deviates from the well know Rouse equation. The experimental data agree well with the equations derived on the basis of non-zero wall velocity. It is found that the wall-normal velocity should not be neglected for density gradient flows because it induces more than for pure water flows.

关键词： sediment concentration reduction of Karman constant log-law sediment concentration distribution

A positive trend in the stability of global offshore wind energy

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Acta Oceanologica Sinica 2024年第1期43卷 123-134页

作者： Chongwei Zheng Dalian Naval Academy Dalian 116018China Marine Resources and Environment research Group on the maritime silk road Dalian 116018China Shandong Provincial Key Laboratory of Ocean Engineering Ocean University of ChinaQingdao 266100China

The recognition on the trend of wind energy stability is still extremely rare,although it is closely related to acquisition efficiency,grid connection,equipment lifetime,and costs of wind energy *** the 40-year(1979–2018)ERA-Interim data from the European center for Medium-Range Weather Forecasts,this study presented the spatial-temporal distribution and climatic trend of the stability of global offshore wind energy as well as the abrupt phenomenon of wind energy stability in key regions over the past 40 years with the climatic analysis method and Mann-Kendall(M-K)*** results show the following 5 points.(1)According to the coefficient of variation(C_(v))of the wind power density,there are six permanent stable zones of global offshore wind energy:the southeast and northeast trade wind zones in the Indian,Pacific and Atlantic oceans,the Southern Hemisphere westerly,and a semi-permanent stable zone(North Indian Ocean).(2)There are six lowvalue zones for both seasonal variability index(S_(v))and monthly variability index(M_(v))globally,with a similar spatial distribution as that of the six permanent stable zones.M_(v) and S_(v) in the Arabian Sea are the highest in the world.(3)After C_(v),M_(v) and S_(v) are comprehensively considered,the six permanent stable zones have an obvious advantage in the stability of wind energy over other sea areas,with C_(v) below 0.8,M_(v) within 1.0,and S_(v) within 0.7 all the year round.(4)The global stability of offshore wind energy shows a positive climatic trend for the past four decades.C_(v),M_(v) and S_(v) have not changed significantly or decreased in most of the global ocean during 1979 *** is,wind energy is flat or more stable,while the monthly and seasonal variabilities tend to shrink/smooth,which is beneficial for wind energy utilization.(5)C_(v) in the low-latitude Pacific and M_(v) and S_(v) in both the North Indian Ocean and the low-latitude Pacific have an obvious abrupt phenomenon at the end of

关键词： global oceans wind energy stability spatial-temporal distribution climatic trend

A new decomposition model of sea level variability for the sea level anomaly time series prediction

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Journal of Oceanology and Limnology 2023年第5期41卷 1629-1642页

作者： Qinting SUN Jianhua WAN Shanwei LIU Jinghui JIANG Yasir MUHAMMAD College of Oceanography and Space Informatics China University of Petroleum(East China)Qingdao 266580China Technology Innovation center for maritime silk road Marine Resources and Environment Networked Observation Ministry of Natural ResourcesQingdao 266580China

Rising sea level is of great significance to coastal societies;predicting sea level extent in coastal regions is *** carrying out predictions,the subsequences obtained using decomposition methods may exhibit a certain regularity and therefore can provide multidimensional information that can be used to improve prediction *** decomposition methods such as seasonal and trend decomposition using Loess(STL)focus mostly on the fluctuating trend of time series and ignore its impact on *** in the signal decomposition domain,such as variational mode decomposition(VMD),have no physical *** response to the above problems,a new decomposition method for sea level anomaly time series prediction(DMSLAP)is *** this method,the trend term in a time series can be isolated and the effects of abnormal sea level change behaviors can be *** decompose multiperiod characteristics using this method while maintaining the smoothness of the analyzed *** altimetry data from 1993 to 2020 are used in experiments conducted in the study *** results are then compared with predictions obtained using existing decomposition methods such as the STL and VMD methods and time varying filtering based on empirical mode decomposition(TVF-EMD).The performance of DMSLAP combined with a prediction method resulted in optimal sea level anomaly(SLA)predictions,with a minimum root mean square error(RMSE)of 1.40 cm and a maximum determination coefficient(R^(2))of 0.93 during *** DMSLAP method was more accurate when predicting 1-year data and 3-year *** TVF-EMD and DMSLAP methods had comparable accuracies,and the periodic term decomposed by the DMSLAP method was more in line with the actual law than that derived using the TVF-EMD ***,DMSLAP can decompose SLA time series better than existing methods and is an effective tool for obtaining short-term SLA prediction.

关键词： time series decomposition satellite altimetry China Sea and its vicinity sea level change

Throughput Capacity of a Container Terminal Considering the Combination Patterns of the Types of Arriving Vessels

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Journal of Shanghai Jiaotong university(Science) 2010年第1期15卷 124-128页

作者：丁以中 Logistics research center Shanghai Maritime University

The throughput capacity of a container terminal is very important in planning and designing at container *** existing methods estimated the throughput capacity without considering its change resulting from the different combination patterns of the types of arriving vessels.A simulation model is established to estimate the throughput capacities of a container terminal under different combination patterns of the types of arriving *** shows that the throughput capacity of a container terminal is influenced by the utilization rates of the berth and quay cranes which result from the different combination patterns of the types of the arriving *** provides a practical approach to estimate the throughput capacity of a container terminal considering the types of the vessels,and it is also helpful for the decision makers to raise the throughputs of the container terminals by optimizing the combination patterns of the types of arriving vessels.

关键词： simulation container terminal throughput capacity utilization rate of the berth

Construction of the 21st Century maritime silk road:Present Situation,Opportunities,Problems and Solutions

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Contemporary Social Sciences 2018年第3期3卷 21-39页

作者： He Fan Zhu He Zhang Qian Wu Lingwei(译) HSBC Business School(PHBS) the research center for the maritime silk road Peking University Peking University 不详

The 21 st Century maritime silk road is an important part of China's new landscape of all-round opening-up,responding to the joint demands of both China and many countries in Southeast Asia,South Asia and *** paper examines countries and regions along the 21 st Century maritime silk road and makes an in-depth study of their typical economic conditions,opportunities for cooperation with China,as well as related existing *** are opportunities in five areas for China to further cooperate with relevant countries and regions; industrial investment,infrastructure investment,resource development,overseas economic & trade zones and maritime economic *** are also three outstanding problems; poor coordination among executive agents,insufficient financial support and lack of a sound and complete talent *** paper offers several suggestions concerning the construction of the 21 st Century maritime silk road to better fit the national conditions and joint demands of China and the countries and regions involved.

关键词： Belt and road Initiative the 21st Century maritime silk road infrastructure financial support

An inducible constitutive expression system in Bombyx mori mediated by phiC31 integrase

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Insect Science 2021年第5期28卷 1277-1289页

作者： Feng Wang Yan-Ting Ji Chi Tian Yuan-Cheng Wang Shen Xu Ri-Yuan Wang Qian-Qian Yang Ping Zhao Qing-You Xia State Key Laboratory of silkworm Genome Biology Chongqing Engineering and Technology Research Center for Novel Silk MaterialsBiological Science Research CenterSouthwest UniversityChongqingChina

Inducible gene-expression systems play important roles in gene functional assays in the post-genome *** phage-derived phiC31 integrase,which mediates an irreversible site-specific cassette exchange between the phage attachment site(attP)and the bacterial attachment site(attB),provides a promising option for the construction of a controllable gene-expression ***,we report a phiC3I integrase-mediated promoter flip system(FLIP)for the inducible expression of target genes in silk-worm(Bombyx mori).First,we constructed a FLIP reporter system,in which a BmAct4 promoter with enhanced translational efficiency was flanked by the attB and attP sites in a head-to-head orientation and further linked in a reverse orientation to a DsRed reporter *** coexpression of a C-terminal modified phiC3 I-NLS integrase carrying a simian virus 40(SV40)nuclear localization signal(NLS)effectively flipped the BmAct4 promoter through an attBlattP exchange,thereby activating the downstream expression of DsRed in a silkworm embryo-derived cell line,***,the FLIP system,together with a system continuously expressing the phiC3 I-NLS integrase,was used to construct binary transgenic silkworm *** between FLIP and phiC31-NLS transgenic silkworm lines resulted in the successful flipping of the BmAct4 promoter,with an approximately 39%heritable transformation efficiency in silkworm offispring,leading to the constitutive and high-level expression of DsRed in silkworms,which accounted for approximately 0.81%of the silkworm pupal *** successful development of the FLIP system offers an effective alternative for manipulating gene expression in silkworms and other lepidopteran species.

关键词： inducible gene expression PhiC31 integrase promoter flipping silkworm