检索结果-南通市图书馆

维普期刊数据库博看期刊

Study on Transient Gap Resonance with Consideration of the Motion of Floating Body

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2022年第6期36卷 994-1006页

作者： GAO jun-liang LYU Jing WANG Jing-hua ZHANG Jian LIU Qian zang jun ZOU Tao School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Key Laboratory of Port Waterway and Sedimentation Engineering of MOTNanjing Hydraulic Research InstituteNanjing 210029China Department of Civil and Environmental Engineering the Hong Kong Polytechnic UniversityHong KongChina Centre for Infrastructure Geotechnical and Water Engineering(IGWE)Department of Architecture and Civil EngineeringUniversity of BathBA27AYU.K Shandong Provincial Key Laboratory of Ocean Engineering Qingdao 266100China

In this paper, the transient fluid resonance phenomenon inside a narrow gap between two adjacent boxes excited by the incident focused waves with various spectral peak periods and focused wave amplitudes is simulated by utilizing the open-sourced computational fluid dynamics software, Open FOAM. The weather-side box is allowed to heave freely under the action of waves, and the lee-side box keeps fixed. This paper mainly focuses on how both the spectral peak period and the focused wave amplitude affect the free-surface amplification inside the gap, the motion of the weather-side box, and the wave loads(including the vertical and the horizontal wave forces) acting on both *** comparison, another two-box system with both boxes fixed is also considered as a control group. It is found that the motion of the weather-side box significantly changes the characteristics of the transient gap resonance, and it would cause that the fluid resonant period becomes 1.4-1.6 times that of the two-box system with both boxes *** the concerned physical quantities(i.e., the free-surface amplification in the gap, the motion of the weather-side box, the wave loads) are found to closely depend on both the spectral peak period and the focused wave amplitude.

关键词： transient gap resonance focused waves free-surface amplification wave loads heave motion OpenFOAM

两种大型海藻提取物对杜氏盐藻生长和代谢活性的促进作用

在线全文

学校读者我要写书评

暂无评论

水生生物学报 2024年第8期48卷 1348-1357页

作者：王婧一蔡春尔张颖董傲查敏俊何培民上海海洋大学海洋科学与生态环境学院上海201306 上海海洋大学水域环境生态上海高校工程研究中心上海201306

实验选取绿潮藻提取物和铜藻提取物作为一种高经济价值藻一一杜氏盐藻生长的营养添加剂,与传统的f/2培养基相比,探究两种大型海藻提取物对杜氏盐藻的生长和某些代谢活性(色素、碳水化合物、蛋白质、光合活性)的影响。藻类生理指标和营... 详细信息

实验选取绿潮藻提取物和铜藻提取物作为一种高经济价值藻一一杜氏盐藻生长的营养添加剂,与传统的f/2培养基相比,探究两种大型海藻提取物对杜氏盐藻的生长和某些代谢活性(色素、碳水化合物、蛋白质、光合活性)的影响。藻类生理指标和营养成分分析表明,不同浓度的藻华提取物对杜氏盐藻生长的促进效果显著。添加0.26%、0.31%、0.38%的绿潮藻提取物和添加0.24%的铜藻提取物均能够显著促进杜氏盐藻生物量增长、光合色素和营养物质的积累,但对杜氏盐藻的最大光化学效率(F_(v)/F_(m))和有效量子产量(Yield)无显著影响。研究表明,一定浓度的绿潮藻提取物和铜藻提取物能够显著促进杜氏盐藻的生长和营养物质的积累,该发现为藻华防控及利用大型藻华提取物来优化杜氏盐藻的生产提供了新的思路。

关键词：绿潮藻提取物铜藻提取物营养添加剂杜氏盐藻培养基

地下式污水处理厂的卫生防护距离及臭气污染控制

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

中国给水排水 2024年第6期40卷 67-73页

作者：杨涛何帅崔容李尔石亚军杜立刚武汉市政工程设计研究院有限责任公司湖北武汉430023 中国市政工程中南设计研究总院有限公司湖北武汉430010 英威尔曼环境技术<武汉>有限责任公司湖北武汉430023

根据《城市排水工程规划规范》(GB 50318—2017),污水处理厂应设置不小于150 m的卫生防护距离。但地下式污水处理厂的主要处理单元均位于密封的箱体内,生产活动产生的臭气污染物不易扩散,对周边环境影响小,并且经收集、处理后影响更小... 详细信息

根据《城市排水工程规划规范》(GB 50318—2017),污水处理厂应设置不小于150 m的卫生防护距离。但地下式污水处理厂的主要处理单元均位于密封的箱体内,生产活动产生的臭气污染物不易扩散,对周边环境影响小,并且经收集、处理后影响更小。因此,其卫生防护距离的设置要求有别于传统地上式污水处理厂。结合有关规范、标准的发展变化,总结了污水处理厂卫生防护距离的设置要求和存在问题;结合大气环境要求和环境影响评价,阐述了污水处理厂卫生防护距离的推导方法。通过对部分同类工程案例的调研,总结了地下式污水处理厂卫生防护距离的设置要求——一般不小于100 m,宜从无组织排放污染源的扩散边界开始计算。同时,结合案例介绍了地下式污水处理厂臭气污染控制的具体做法。

关键词：地下式污水处理厂卫生防护距离设置要求臭气污染控制

A family of novel bifunctional organocatalysts:Highly enantioselective alcoholysis of meso cyclic anhydrides and its application for synthesis of the key intermediate of P2X_7 receptor antagonists

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2013年第7期24卷 553-558页

作者： Hong-jun Yang Fang-jun Xiong Jie Li Fen-er Chen Department of Chemistry Fudan University Institute of Biomedical Science Fudan University

A family of novel squaramides/sulfamides based on 1,2-alkamine was developed as chiral bifunctional catalysts to promote the asymmetric alcoholysis of meso cyclic anhydrides. The hemiesters were obtained in high yield with up to 93% ee. The usefulness of this methodology was demonstrated in the asymmetric synthesis of the key intermediate of P2X7 receptor antagonists.

关键词： Asymmetric alcoholysis Bifunctional organocatalyst Cyclic anhydrides P2X7 receptor antagonists Sulfamides

The primary use of artificial intelligence in cardiovascular diseases: what kind of potential role does artificial intelligence play in future medicine?

在线全文

学校读者我要写书评

暂无评论

Journal of Geriatric Cardiology 2019年第8期16卷 585-591页

作者： Yang YAN Jia-Wen ZHANG Guang-Yao zang jun PU Department of Cardiology Ren Ji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Department of Dermatology the First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina School of Medicine Jiangsu UniversityZhenjiangJiangsuChina

Cardiovascular diseases (CVD) is a major threat to human health and the leading cause of death worldwide.[1] The incidence of CVD caused 17.6 million deaths in 2016, an increase of 14.5% from 2006 to 2016.[2] Unfortunately, the mortality and morbidity rates of CVD are increasing year by year, especially in developing regions. Studies have shown that approximately 80% of CVD-related deaths occur in low- and middle-income countries. Besides, these deaths occur at a younger age than in high-income countries.[3]?

关键词： Artificial intelligence Cardiovascular diseases Machine learning

GB/T41972—2022《铸铁件铸造缺陷分类及命名》国家标准解读

在线全文

学校读者我要写书评

暂无评论

铸造 2024年第3期73卷 428-436页

作者：丛建臣孙军丛红日冯梅珍郭二军王丽萍山东理工大学山东淄博255000 天润工业技术股份有限公司山东威海264400 哈尔滨理工大学黑龙江哈尔滨150006

介绍标准的制定过程和主要内容、与ISO/TR16078:2013标准的主要技术差异和标准的应用。结合铸造的实际生产过程,删除了部分非铸铁件出现的缺陷、不确定的缺陷或与其他内容重复的缺陷以及热处理缺陷,增加了部分生产中常见但标准中未能提... 详细信息

介绍标准的制定过程和主要内容、与ISO/TR16078:2013标准的主要技术差异和标准的应用。结合铸造的实际生产过程,删除了部分非铸铁件出现的缺陷、不确定的缺陷或与其他内容重复的缺陷以及热处理缺陷,增加了部分生产中常见但标准中未能提及的缺陷,使其具有科学性和实用性。

关键词：铸铁件铸造缺陷国家标准解读

A 3-D numerical study of solitary wave interaction with vertical cylinders using a parallelised particle-in-cell solver

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2017年第5期29卷 790-799页

作者： Qiang Chen jun zang David M.Kelly Aggelos S.Dimakopoulos WEIR Research Unit Department of Architecture and Civil EngineeringUniversity of BathBathUK Coastal Research Laboratory International Hurricane Research CenterFlorida International UniversityMiamiUSA HR Wallingford WallingfordOxonUK

This paper aims to provide a better understanding of the interaction between solitary waves and vertical circular cylinders. This is achieved via process based numerical modelling using the parallel particle-in-cell based incompressible flow solver PICIN. The numerical model solves the Navier-Stokes equations for free-surface flows and incorporates a Cartesian cut cell method for fluid-structure interaction. Solitary waves are generated using a piston-type wave paddle. The PICIN model is first validated using a test case that involves solitary wave scattering by a single vertical cylinder. Comparisons between the present results and experimental data show good agreement for the free surface elevations around the cylinder and the horizontal wave force on the cylinder. The model is then employed to investigate solitary wave interaction with a group of eleven vertical cylinders. The wave run-up and wave forces on the cylinders are discussed.

关键词： CFD hybrid Eulerian-Lagrangian particle-in-cell solitary wave vertical cylinder

First-principles Study of Adsorption and Dissociation of Methanol on the Pt（lO0） Surface

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2012年第2期25卷 199-203,I0004页

作者： Zhuo Wang er-jun Kan Jin-long Yang Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230025China Department of Applied Physics Nanjing University of Science and TechnologyNanjing 210037China

Using first-principles calculations, we studied the interaction of methanol with the Pt（100） surface based on generalized gradient approximation. We found that top sites of Pt（100） surface are the favored adsorptive positions in energy, and methanol molecule interacts with the Pt surface through oxygen atoms. Moreover, we also explored the possible dissociation pathways of methanol on the Pt surface, and suggested that the products of dissociation can be controlled by the external manipulation.

关键词： Methanol Pt(100) surface Adsorption Dissociation

Numerical study of roll motion of a 2-D floating structure in viscous flow

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 Hydrodynamics 2016年第4期28卷 544-563页

作者： Lifen CHEN Liang SUN jun zang A.J.HILLIS A.R.PLUMMer WEIR Research Unit Department of Architecture and Civil EngineeringUniversity of Bath Department of Mechanical Engineering University of Bath

In the present study,an open source CFD tool,Open FOAM has been extended and applied to investigate roll motion of a 2-D rectangular barge induced by nonlinear regular waves in viscous *** of the present Open FOAM results with published potential-flow solutions and experimental data have indicated that the newly extended Open FOAM model is very capable of accurate modelling of wave interaction with freely rolling *** wave-induced roll motions,hydrodynamic forces on the barge,velocities and vorticity fields in the vicinity of the structure in the presence of waves have been investigated to reveal the real physics involved in the wave induced roll motion of a 2-D floating *** analysis has been carried out to examine the effect of structure dimension and body draft on the roll motion.

关键词： floating normalized rectangular capable viscous vorticity draft modelling rotating hydrodynamic