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A Comparative Study of Numerical Models for Wave Propagation and Setup on Steep Coral Reefs

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China Ocean Engineering 2019年第4期33卷 424-435页

作者： ZHANG Shan-ju zhu liang-sheng ZOU Kai South China University of Technology School of Civil Engineering and Transportation

Complex factors including steep slopes, intense wave breaking, large bottom friction and remarkable wave setup should be considered while studying wave propagation over coral reefs, and how to simulate wave propagation and setup on coral reefs efficiently has become a primary focus. Several wave models can be used on coral reefs as have been published, but further testing and comparison of the reliability and applicability of these models are needed. A comparative study of four numerical wave models (i.e., FUNWAVE-TVD, Coulwave, NHWAVE and ZZL18) is carried out in this paper. These models’ governing equations and numerical methods are compared and analyzed firstly to obtain their differences and connections;then the simulation effects of the four wave models are tested in four representative laboratory experiments. The results show that all four models can reasonably predict the spectrum transformation. Coulwave, NHWAVE and ZZL18 can predict the wave height variation more accurately;Coulwave and FUNWAVE-TVD tend to underestimate wave setup on the reef top induced by spilling breaker, while NHWAVE and ZZL18 can predict wave setup relatively accurately for all types of breakers;NHWAVE and ZZL18 can predict wave reflection by steep reef slope more accurately. This study can provide evidence for choosing suitable models for practical engineering or establishing new models.

关键词： coral reefs steep slope Boussinesq equations wave propagation and setup wave breaking numerical simulation comparative study

RESEARCH ON WAVE FORCES ACTING ON THE UNIT LENGTH OF A VERITICAL BREAKWATER BY TESTS AND A NUMERICAL MODEL

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Journal of Hydrodynamics 2006年第5期18卷 512-519页

作者： HU Jin-peng YU Yu-xiu zhu liang-sheng LED South China Sea Institute Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China Graduate School of the Chinese Academyof Sciences Beijing 100049China State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology Dalian 116024 China

Comprehensive 3D model tests and numerical simulation were performed to study the effects of wave obliquity and multidirectionality on the wave forces acting on vertical breakwaters. The variation of wave forces acting on the unit length of a breakwater was analyzed, and the results were compared with Goda＇s formula. A numerical model based on a short-crest wave system was used to model regular wave forces for practical use, which showed good results for those waves with small incident angles.

关键词： vertical breakwater uni- and multidirectional irregular waves wave forces acting on the unit length short-crest wave model

NUMERICAL SIMULATION OF SUMMER CIRCULATION IN THE EAST CHINA SEA AND ITS APPLICATION IN ESTIMATING THE SOURCES OF RED TIDES IN THE YANGTZE RIVER ESTUARY AND ADJACENT SEA AREAS

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Journal of Hydrodynamics 2007年第3期19卷 272-281页

作者： CHEN Xiu-hua zhu liang-sheng ZHANG Hong-sheng South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China College of Traffic and Communications South China University of Technology Guangzhou 510641 China School of Naval Architecture Ocean and Civil Engineering Shanghai Jiaotong University Shanghai 200030 China

Based on the COHERENS （a Coupled Hydrodynamical Ecological model for Regional Shelf seas）, a three-dimensional baroclinic model for the summer of East China Sea （ECS） was established with the sigma-coordinate in the vertical direction and spherical coordinate in the horizontal direction. The circulation patterns of the Kuroshio Current, the Taiwan Warm Current （TWC）, the Tsushima Current and the Yangtze Diluted Water （YDW） were successfully simulated with this model. The calculated results are fairly consistent with previous observations and studies. Based on this baroclinic current field, the Lagranian particles tracking was simulated to estimate the possible origins of the red tides frequently occurring in the Yangtze River estuary and its adjacent sea areas. If there are ＂seeds＂（cysts） of the red tide algae at the seabed of the Taiwan Strait, the offshore of Fujian and Zhejiang Provinces and the northeast Taiwan Island, those are extremely possible sources of the red tides in the Yangtze River estuary and its adjacent sea areas. Field data are needed to confirm it. Numerical simulation to estimate the source of the red tides is a new application of the Lagrangian transport in the marine ecology.

关键词： East China Sea （ECS） Yangtze River estuary,numerical simulation COHEERNS Lagrangian transport red tide the source of the red tides

Day-ahead P2P Energy Sharing Strategy Among Energy Hubs Considering Flexibility of Energy Storage and Loads

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1105-1118页

作者： Penghua Li Wanxing sheng Qing Duan Jun liang Cunhao zhu China Electric Power Research Institute Beijing 100192China School of Engineering Cardiff UniversityUK IEEE

Multi-energy systems are one of the key technologies to tackle energy crisis and environmental pollution.An energy hub(EH)is a minimum multi-energy system.Interconnection of multiple EHs through energy routers(ERs)can realize mutual energy assistance.This paper proposes a peer-to-peer(P2P)energy sharing strategy between EHs including ERs in an interconnected system,which is divided into two levels.In the lower level,a method of determining the charging/discharging constraints of energy storage devices is proposed.Based on the Lyapunov optimization method,virtual queues are used to model the energy storage devices and flexible loads in the system.The objective is to minimize the overall operating cost of the interconnected system.In the upper level,a non-cooperative game model is introduced to minimize the cost of purchasing power from other EHs for each EH.A best response-based method is adapted to find the Nash equilibrium.The simulation outcomes demonstrate that application of the proposed strategy can reduce operating costs of an interconnected system and each EH.On basis of a real-world dataset of interconnected EHs,both analytical and numerical results show the effectiveness of the proposed strategy.

关键词： Energy hub energy router Lyapunov optimization non-cooperative game peer to peer virtual queue

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高功率电机效率测试实验平台设计

机电产品开发与创新 2024年第2期37卷 69-71,89页

作者：朱胜良张敬东王聪胡培浩郑彬攀枝花钢城集团有限公司安全环保生产部四川攀枝花617000 攀枝花学院智能制造学院四川攀枝花617000 攀枝花学院电气信息工程学院四川攀枝花617000

本文以高功率电机效率测试实验平台为研究对象,参照电机试验方法--输入输出法进行电机效率试验。同时考虑到运行电机温度引起的损耗变化,以及对实际效率的影响,根据电机的运行温度和环境对测量数据进行修正。在保证电机效率测试平台安... 详细信息

本文以高功率电机效率测试实验平台为研究对象,参照电机试验方法--输入输出法进行电机效率试验。同时考虑到运行电机温度引起的损耗变化,以及对实际效率的影响,根据电机的运行温度和环境对测量数据进行修正。在保证电机效率测试平台安全和经济的前提下,设计了电动机的测试电路与主要零部件。对于同一类型的电机,记录电机壳体温度和一定时间内的功率,将电机加载运行到指定功率,记录电机此时的输入输出参数,并进行参数计算,最终达到高功率电机效率的测试目的。

关键词：高功率电机试验平台效率测试

疏肝和胃方治疗肝胃不和型难治性胃食管反流病随机对照研究

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中国中西医结合杂志 2024年第4期44卷 399-406页

作者：张楠程艳梅苏师予朱生樑王宏伟徐亭亭王磊杨嘉胡紫凌王美琪上海中医药大学附属岳阳中西医结合医院消化内科上海200437 上海市普陀区人民医院中医科上海200060

目的评价疏肝和胃方治疗肝胃不和型难治性胃食管反流病(rGERD)的临床疗效及对肠道菌群的影响。方法选取肝胃不和型rGERD患者80例,按随机数字表法分为试验组和对照组,每组40例。试验组予疏肝和胃方,对照组予艾司奥美拉唑镁肠溶片联合枸... 详细信息

目的评价疏肝和胃方治疗肝胃不和型难治性胃食管反流病(rGERD)的临床疗效及对肠道菌群的影响。方法选取肝胃不和型rGERD患者80例,按随机数字表法分为试验组和对照组,每组40例。试验组予疏肝和胃方,对照组予艾司奥美拉唑镁肠溶片联合枸橼酸莫沙必利分散片,均连续治疗8周。观察两组治疗前、治疗4周、治疗8周的中医证候评分、胃食管反流病问卷(GERD-Q)量表评分变化;应用16S rDNA高通量测序检测治疗前、治疗8周后肠道菌群OUT数量、多样性及其丰度变化情况。结果最终纳入分析80例,其中试验组40例,对照组40例。与本组治疗前比较,两组治疗4、8周中医证候评分、GERD-Q量表评分均降低(P0.05)。在属水平,试验组治疗8周后,罕见小球菌属、颤螺旋菌属、果胶单核菌属相对丰度升高(P<0.05),瘤胃球菌属相对丰度下降(P<0.05)。结论与优化PPI联合莫沙必利方案相比,疏肝和胃方对缓解肝胃不和型rGERD临床症状效果更佳,其机制可能与调节肠道菌群多样性及部分菌属丰度有关。

关键词：难治性胃食管反流病疏肝和胃方临床疗效肠道菌群中药复方中西医结合随机对照试验

Plant RNA-binding proteins:Phase separation dynamics and functional mechanisms underlying plant development and stress responses

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Molecular Plant 2024年第4期17卷 531-551页

作者： sheng Fan Yu Zhang Shaobo zhu Lisha Shen Temasek Life Sciences Laboratory 1 Research LinkNational University of Singapore1 Research LinkSingapore 117604Singapore Department of Biological Sciences National University of Singapore14 Science Drive 4Singapore 117543Singapore

RNA-binding proteins(RBPs)accompany RNA from synthesis to decay,mediating every aspect of RNA metabolism and impacting diverse cellular and developmental processes in eukaryotes.Many RBPs undergo phase separation along with their bound RNA to form and function in dynamic membraneless biomolecular condensates for spatiotemporal coordination or regulation of RNA metabolism.Increasing evidence suggests that phase-separating RBPs with RNA-binding domains and intrinsically disordered regions play important roles in plant development and stress adaptation.Here,we summarize the current knowledge about how dynamic partitioning of RBPs into condensates controls plant development and enables sensing of experimental changes to confer growth plasticity under stress conditions,with a focus on the dynamics and functional mechanisms of RBP-rich nuclear condensates and cytoplasmic granules in mediating RNA metabolism.We also discuss roles of multiple factors,such as environmental signals,protein modifications,and N6-methyladenosine RNA methylation,in modulating the phase separation behaviors of RBPs,and highlight the prospects and challenges for future research on phase-separating RBPs in crops.

关键词： RNA-binding proteins phase separation biomolecular condensates RNA metabolism development stress resilience

Energy saving analysis for CO_(2)–O_(2)mixed injection technology in converter steelmaking

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Journal of Iron and Steel Research(International) 2024年第5期31卷 1095-1103页

作者： Bao-chen Han Chun-liang Gao Ya-qiang Li Dan Liu Guang-sheng Wei Rong zhu Hebei Key Laboratory of Material Near-Net Forming Technology School of Material Science and EngineeringHebei University of Science and TechnologyShijiazhuang050018HebeiChina Department of Automotive Engineering Hebei Vocational University of Technology and EngineeringXingtai054000HebeiChina School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing100083China

Energy-saving in China's iron and steel industry still relies on the development and improvement of short-term energy saving technologies.Therefore,a special converter smelting technology incorporating energy saving was proposed.To evaluate the energy-saving potential of the CO_(2)–O_(2)mixed injection(COMI)technology,collected production data were used to develop an improved techno-economic model.Calculations reveal that the technology can save energy through auxiliary material consumption,sensible heat of solid by-product,iron loss reduction,and energy recovery.The application of COMI technology in an enterprise is cost effective,involving the energy saving potential of 0.206 GJ/t,the cost of conserved energy of−48.83 yuan/GJ,and a simple payback period of 0.35 year for a 60-million-yuan investment.Sensitivity analysis shows that the investment cost and discount rate primarily influence the cost of conserved energy of the technology.As the discount rate increased,the cost of conserved energy also gradually increased.Overall,the COMI technology is an energy-saving technology with good development prospects.

关键词： Converter steelmaking COMI technology Energy saving Techno-economic model Investment cost

The journey towards physiology and pathology: Tracing the path of neuregulin 4

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Genes & Diseases 2024年第2期11卷 687-700页

作者： Min Chen Jieying zhu Hongyang Luo Wangjing Mu liang Guo School of Exercise and Health and Shanghai Frontiers Science Research Base of Exercise and Metabolic Health Shanghai University of SportShanghai 200438China

Neuregulin 4 (Nrg4),an epidermal growth factor (EGF) family member,can bind to and activate the ErbB4 receptor tyrosine kinase.Nrg4 has five different isoforms by alternative splicing and performs a wide variety of functions.Nrg4 is involved in a spectrum of physiological processes including neurobiogenesis,lipid metabolism,glucose metabolism,thermogenesis,and angiogenesis.In pathological processes,Nrg4 inhibits inflammatory factor levels and suppresses apoptosis in inflammatory diseases.In addition,Nrg4 could ameliorate obesity,insulin resistance,and cardiovascular diseases.Furthermore,Nrg4 improves non-alcoholic fatty liver disease (NAFLD) by promoting autophagy,improving lipid metabolism,and inhibiting cell death of hepatocytes.Besides,Nrg4 is closely related to the development of cancer,hyperthyroidism,and some other diseases.Therefore,elucidation of the functional role and mechanisms of Nrg4 will provide a clearer view of the therapeutic potential and possible risks of Nrg4.

关键词： Angiogenesis Cardiovascular diseases Inflammation Insulin resistance Lipid and glucose metabolism NAFLD Neurobiogenesis Obesity