期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到727篇文章
< 1 2 … 37 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Adding Sub-chain Method for Structural Synthesis of Planar Closed Kinematic Chains 认领 引用 被引量：2
1
作者 DENG Zongquan YANG Fei TAO Jianguo 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2012年第2期206-213,共8页
For at least the past five decades,structural synthesis has been used as a main means of finding better mechanisms with some predefined function.In structural synthesis,isomorphism identification is still a problem un... For at least the past five decades,structural synthesis has been used as a main means of finding better mechanisms with some predefined function.In structural synthesis,isomorphism identification is still a problem unsolved well,and to solve this problem is very significant to the design of new mechanisms.According to the given degree of freedom（DOF） and link connection property of planar closed chain mechanisms,vertex assortment is obtained.For solving the isomorphism problem,a method of the adding sub-chains is proposed with the detailed steps and algorithms in the synthesizing process.Employing this method,the identification code and formation code of every topological structure are achieved,therefore many isomorphic structures could be eliminated in time during structural synthesis by comparing those codes among different topological graphs,resulting in the improvement of synthesizing efficiency and accuracy,and the approach for eliminating rigid sub-chains in and after the synthesizing process is also presented.Some examples are given,including how to add sub-chains,how to detect simple rigid sub-chains and how to obtain identification codes and formulation codes et al.Using the adding sub-chain method,the relative information of some common topological graphs is given in the form of table.The comparison result is coincident with many literatures,so the correctness of the adding sub-chain method is convinced.This method will greatly improve the synthesizing efficiency and accuracy,and has a good potential for application. 展开更多
关键词 structural synthesis adding sub-chain method identification code formation code rigid sub-chains
暂未订购 下载PDF
The Quality Specifications of Mischmetal Wire and Rod and the Method of Adding Rare Earth in Steel 认领 引用
2
作者 鞠远峰 左生华 +3 位作者 林勤 刘爱生 王群 林东晖 《Journal of Rare Earths》 SCIE EI CAS 1994年第3期231-233,共3页
The quality of mischmetal wire and rod and the method of adding rare earth into steel are quite important for making high quality steel. This paper proposes a quality specification of wire and rod as well as related a... The quality of mischmetal wire and rod and the method of adding rare earth into steel are quite important for making high quality steel. This paper proposes a quality specification of wire and rod as well as related adding method. The paper also provides principles for selecting raw material and adding method. 展开更多
关键词 mischmetal wire and rod Quality specification Adding method
暂未订购 下载PDF
cosCSLOCA软件评估方法和针对ADS喷放的评估实践 认领 引用
3
作者 沙会娥 沈峰 余慧 《核动力工程》 EI CAS CSCD 北大核心 2026年第4期45-51,共7页
cosCSLOCA软件是国家电投集团科学技术研究院研发的堆芯设计和安全分析一体化软件包COSINE中的小破口安全分析软件。自动卸压系统(ADS)部件是CAP三代压水堆的关键部件,ADS喷放过程对系统的泄压和堆芯的水装量有较大影响,基于cosCSLOCA... cosCSLOCA软件是国家电投集团科学技术研究院研发的堆芯设计和安全分析一体化软件包COSINE中的小破口安全分析软件。自动卸压系统(ADS)部件是CAP三代压水堆的关键部件,ADS喷放过程对系统的泄压和堆芯的水装量有较大影响,基于cosCSLOCA软件开展ADS部件喷放现象的确认评估是十分必要的。本文基于评价模型开发与评估过程(EMDAP)方法,并结合选取的保守失水事故(LOCA)分析方法,研发了一套cosCSLOCA软件的实验确认评估方法,根据现象识别与排序表(PIRT)和附录K要求生成评估矩阵,基于评估矩阵开展自下而上和自上而下的系统性确认评估。基于此方法开展ADS评估实践,采用Ferrell-McGee实验、Marviken实验、401喷放与临界流实验开展自下而上的确认评估,并采用非能动堆芯冷却系统试验装置(ACME)小破口实验开展自上而下的确认评估。结果表明cosCSLOCA软件能合理模拟次临界流现象、临界流现象、两相压降现象,软件的Moody模型具有保守性,能够保守预测ADS误触发小破口事故。因此,cosCSLOCA软件的实验确认评估方法可全面分析局部模型、部件系统相互作用及整体计算能力,未来可推广应用于新堆型保守LOCA分析程序的研发。 展开更多
关键词 评估方法 自动卸压系统(ADS) 小破口 临界流 评价模型开发与评估过程(EMDAP) cosCSLOCA
暂未订购 下载PDF
Wheat Generation Adding in Xundian County of Yunnan Province in Summer 认领 引用
4
作者 Kong Zhi-you Liu Ye-ju Qin Peng 《Journal of Northeast Agricultural University(English Edition)》 CAS 2014年第4期1-9,共9页
Local climate conditions and sowing time are very important to the vernalization and summer reproduction of the wheat. Xundian County is located in Yunnan Province of China, at latitude 25.56° north and longitude... Local climate conditions and sowing time are very important to the vernalization and summer reproduction of the wheat. Xundian County is located in Yunnan Province of China, at latitude 25.56° north and longitude 103.25° east. Xundian County is situated 1 873 m above sea level, and is conducive for the summer reproduction of the wheat. To investigate the optimal sowing time, 11 spring wheat cultivars and one semi-winter wheat cultivar were sown 10 times at an interval of fi ve days from May 26, 2012, and the strong winter wheat Suyin 10 was treated in a vernalization room at 2℃ with different concentrations of the gibberellin and 5-azacytidine. The results showed that Suyin 10 should be vernalized at 2℃ for 30 days in summer, and the growth periods of strong winter wheat plants could been shortened if treated with a specifi c concentration of the gibberellin and 5-azacytidine at a low temperature. The growth period of the spring wheat in summer reproduction was delayed, and their agronomic traits gradually decreased with the passage of the sowing time. Thus, spring wheat should be sown at the earliest time possible for better yield. June 25 should be the latest date for summer reproduction of the wheat, but the semi-winter wheat cultivars in Xundian County should be added generation in summer after being treated at 2℃ for 10 days. Xundian County is a suitable location for summer reproduction of the wheat in China. 展开更多
关键词 wheat generation adding in summer vernalization method sowing time
暂未订购 下载PDF
Study on Wave Added Resistance of a Deep-V Hybrid Monohull Based on Panel Method 认领 引用 被引量：2
5
作者 WANG Xujie ZHAO Jing +2 位作者 ZHANG Huidong CAO Pengfei LIU Peng 《Journal of Ocean University of China》 SCIE CAS CSCD 2020年第3期601-608,共8页
In this paper, a panel method based on three dimensional potential flow theory is used to study the problem of wave added resistance. The time-domain motion response of Wigely III ship in head waves is calculated by A... In this paper, a panel method based on three dimensional potential flow theory is used to study the problem of wave added resistance. The time-domain motion response of Wigely III ship in head waves is calculated by AQWA, and then the wave added resistance of ship is obtained by near-field pressure integration method. By comparing the calculated results with the experimental data in literature, it is shown that the variation trend and peak value are in good agreement, and the accuracy and efficiency meet the research requirements. Based on the above mentioned method, the wave added resistance of a deep-V hybrid monohull in head waves is studied. The motions and wave added resistances of the deep-V hybrid monohull and the deep-V original ship advancing in head waves with various forward speed and wave frequencies are calculated and analyzed. The results show that the longitudinal motion response of the deep-V hybrid monohull is effectively suppressed and the wave added resistance is obviously reduced, the new type of ship has good engineering application prospects. The present method provides an approach of satisfactory accuracy and efficiency to predict wave added resistance of ships voyaging in waves. 展开更多
关键词 wave added resistance panel method hybrid monohull time-domain motion response near-field method
暂未订购 下载PDF
Study on Wave Added Resistance of Ships in Oblique Waves Based on Panel Method 认领 引用 被引量：1
6
作者 WANG Xujie ZHANG Ri +1 位作者 ZHAO Jing CAO Pengfei 《Journal of Ocean University of China》 SCIE CAS CSCD 2022年第3期773-781,共9页
When the ship is sailing at sea,wave added resistance has great influence on the rapidity and economy of the ship.With the increasing pressure of energy and environmental protection,IMO has proposed the EEDI formula o... When the ship is sailing at sea,wave added resistance has great influence on the rapidity and economy of the ship.With the increasing pressure of energy and environmental protection,IMO has proposed the EEDI formula of the newly built ships,which restricts the energy consumption standard of civil ships more strictly.Therefore,a panel method based on three dimensional potential flow theory is proposed to study the problem of wave added resistance in this paper.Firstly,the method solves the motion responses of the ship in the time domain,and then calculates the wave added resistance of the ship by near-field pressure integration method.The wave added resistance of S175 container ship in head and oblique waves are calculated and compared with the experimental data,and the accuracy of the proposed method are verified.At last,the influence of Froude number and wave direction angle on wave added resistance is studied.The proposed method provides an approach of satisfactory accuracy and efficiency for the development of high-performance new ship forms,optimization of ship hull lines,comprehensive performance evaluation of ships and practical navigation guidance. 展开更多
关键词 wave added resistance oblique wave panel method potential flow theory
暂未订购 下载PDF
A B-Spline Method Used to Calculate Added Resistance in Waves 认领 引用
7
作者 Razieh Zangeneh Mahmood Ghiasi 《Journal of Marine Science and Application》 CSCD 2017年第1期20-26,共7页
Making an exact computation of added resistance in sea waves is of high interest due to the economic effects relating to ship design and operation. In this paper, a B-spline based method is developed for computation o... Making an exact computation of added resistance in sea waves is of high interest due to the economic effects relating to ship design and operation. In this paper, a B-spline based method is developed for computation of added resistance. Based on the potential flow assumption, the velocity potential is computed using Green＇s formula. The Kochin function is applied to compute added resistance using Maruo＇s far-field method, the body surface is described by a B-spline curve and potentials and normal derivation of potentials are also described by B-spline basis functions and B-spline derivations. A collocation approach is applied for numerical computation, and integral equations are then evaluated by applying Gauss–Legendre quadrature. Computations are performed for a spheroid and different hull forms; results are validated by a comparison with experimental results. All results obtained with the present method show good agreement with experimental results. 展开更多
关键词 Added resistance B-spline Kochin function Maruo＇s far-field method Gauss–Legendre quadrature
暂未订购 下载PDF
基于多参考源的ADS‑B数据可信度综合评价 认领 引用 被引量：1
8
作者 高鑫 《指挥信息系统与技术》 2025年第5期52-56,共5页
广播式自动相关监视(ADS‑B)作为近年来新兴的航空监视技术手段,其数据的可信度受航空器主动欺骗、导航信息不准确等因素影响。通过与S模式二次雷达、A/C模式二次雷达和飞行计划等多源参数的一致性分析,采用层次分析法和模糊综合评价法... 广播式自动相关监视(ADS‑B)作为近年来新兴的航空监视技术手段,其数据的可信度受航空器主动欺骗、导航信息不准确等因素影响。通过与S模式二次雷达、A/C模式二次雷达和飞行计划等多源参数的一致性分析,采用层次分析法和模糊综合评价法建立了ADS‑B数据可信度综合评价模型。用模拟数据进行验证,结果表明,该模型能够较好反映测试数据的可信度,可作为ADS‑B数据可信度评估的一种手段。 展开更多
关键词 广播式自动相关监视(ADS‑B) 数据可信度综合评价模型 层次分析法 模糊综合评价法
暂未订购 下载PDF
数字经济全口径增加值核算方法研究 认领 引用 被引量：1
9
作者 任雪 秦瑶 +1 位作者 周先东 薛健 《当代经济科学》 CSSCI 北大核心 2026年第1期1-16,共16页
随着数字经济统计工作进入实践阶段,数字经济核心产业和融合产业增加值核算面临的若干复杂问题逐步凸显,制约了中国政府部门数字经济统计工作发展。在全面梳理总结国内外数字经济统计核算研究现状的基础上,以《数字经济及其核心产业统... 随着数字经济统计工作进入实践阶段,数字经济核心产业和融合产业增加值核算面临的若干复杂问题逐步凸显,制约了中国政府部门数字经济统计工作发展。在全面梳理总结国内外数字经济统计核算研究现状的基础上,以《数字经济及其核心产业统计分类(2021)》为指导,重点讨论数字经济统计内涵,优化数字经济增加值核算范围,深入研究中国数字经济全口径增加值统计核算方法,在数据来源、核算方法和统计制度方面进行探索创新,提出可操作、可复制和可推广的一揽子数字经济全口径增加值核算方案。以重庆市为例,对数字经济全口径增加值核算方案进行试算验证。结果表明,该核算方案在核算方法思路、核算基础数据依赖、核算系数专项调查方案等方面具有科学性和实用性,能够为全国及各地区统计系统提供可复制、可参考的核算框架。据此为数字经济增加值核算提供新的思路和方法,为相关部门制定和完善中国数字经济统计核算制度的政策建议提供有益参考。 展开更多
关键词 数字经济统计 核心产业 融合产业 投入产出表 增加值 核算范围 核算方法
暂未订购 下载PDF
基于增加值核算、知识产权与应用场景系数调整的数据资产价格评估 认领 引用 被引量：1
10
作者 宋河发 左诗玥 《科技管理研究》 CSSCI 2026年第5期156-164,共9页
数据资产价格评估已成为目前制约数据要素经营与交易的突出问题。基于此,本文提出以数据资产增加值核算为基础,数据相关专利数量和质量、软件著作权数量及应用场景规模进行贝叶斯推断作为调整参数的数据资产价格评估方法,并以2024年半... 数据资产价格评估已成为目前制约数据要素经营与交易的突出问题。基于此,本文提出以数据资产增加值核算为基础,数据相关专利数量和质量、软件著作权数量及应用场景规模进行贝叶斯推断作为调整参数的数据资产价格评估方法,并以2024年半年报中有效披露数据资产信息的40家上市公司为样本,验证了模型的可行性和有效性。研究证明,基于增加值核算,通过专利和软件著作权与应用场景进行贝叶斯系数调整评估数据资产价格是可行的,能够反映数据资产价值。为促进数据资产评估健康发展,应建立企业数据资产成本费用归集制度和数据资产增加值核算制度;将数据资产直接相关的专利权、软件著作权和应用场景作为主要考虑因素,并将数据资产评估价格作为公允价格;实行企业数据资产价值单列管理,反映企业自主科技创新和技术引进对数据资产价值的贡献。 展开更多
关键词 数据资产 价格评估 增加值 知识产权 贝叶斯推断
暂未订购 下载PDF
琥乙红霉素口服制剂微生物限度检查中大环内酯酶的应用探讨 认领 引用
11
作者 佘凡 马鹏飞 +2 位作者 高翔 刘刚 周瑞 《中国抗生素杂志》 CAS CSCD 北大核心 2026年第6期744-751,共8页
目的探讨琥乙红霉素口服制剂微生物限度检查方法适用性试验中,大环内酯酶作为中和剂对微生物限度检查结果的影响。方法按照《中国药典》2020年版四部通则1105、1106、1107,对口服琥乙红霉素制剂采用大环内酯酶进行微生物限度方法适用性... 目的探讨琥乙红霉素口服制剂微生物限度检查方法适用性试验中,大环内酯酶作为中和剂对微生物限度检查结果的影响。方法按照《中国药典》2020年版四部通则1105、1106、1107,对口服琥乙红霉素制剂采用大环内酯酶进行微生物限度方法适用性试验研究。试验分别探讨了不同的添加方式和添加量的中和剂,在供试液、冲洗液、冲洗后的滤膜以及培养基中对计数微生物菌落回收的影响;探讨了控制菌检查中,不同添加量的中和剂和增菌培养基不同体积对试验菌检查结果的影响;试验同时设置了不加中和剂的对照组,以对比分析中和剂的作用。结果试验发现,相同剂量的中和剂添加在冲洗后的滤膜上或培养基中,能获得较高的微生物回收比值,有效消除抑菌性;添加在供试液和冲洗液中微生物回收比值低,不利于消除抑菌性;不添加中和剂的对照组难以消除抑菌性。控制菌检查时,需采用中和法联合增加培养基用量的直接接种法消除其对试验菌检出的影响。结论琥乙红霉素口服制剂微生物限度检查中,使用大环内酯酶作为特异性中和剂,能够有效降低琥乙红霉素对微生物生长的抑制作用,从而提高微生物检查结果的准确性。 展开更多
关键词 大环内酯酶 中和剂 添加方式 添加量 抑菌性
暂未订购 下载PDF
农业全产业链规模对农产品增加值收益的影响研究 认领 引用 被引量：1
12
作者 罗良清 章标彪 郭玉帑 《南昌大学学报（人文社会科学版）》 CSSCI 北大核心 2026年第1期86-100,共15页
农业全产业链发展是实现农业增值增效、促进乡村振兴的重要手段。通过界定农业全产业链产业范围,构建农业全产业链增加值测算框架,对中国30个省(自治区、直辖市)农业全产业链规模进行测算,并运用双向固定效应模型实证检验农业全产业链... 农业全产业链发展是实现农业增值增效、促进乡村振兴的重要手段。通过界定农业全产业链产业范围,构建农业全产业链增加值测算框架,对中国30个省(自治区、直辖市)农业全产业链规模进行测算,并运用双向固定效应模型实证检验农业全产业链规模对农产品增加值收益的影响。结果表明:各地区农业全产业链规模均呈上升趋势,且农业全产业链规模能够显著提升农产品增加值收益。从作用机制来看,农业全产业链规模可以通过加快农业产业集聚、提高农业数字化水平来提升农产品增加值收益;地区交通基础设施水平能强化农业全产业链规模对农产品增加值收益的正向影响,但对国内外增加值收益的影响存在差异。从异质性来看,农业全产业链规模对粮食产销平衡区、西部地区和畜牧养殖及畜产品加工地区的农产品增加值收益提升作用最为明显。因此,应充分发挥政策力量,加快推动农业全产业链建设,实施差异化发展战略,从而提升农业综合效益。 展开更多
关键词 农业全产业链 增加值测算 投入产出法 农产品增加值收益
暂未订购 下载PDF
提升还是拖累?中国木材产业全球价值链地位跃迁的出口隐含碳效应 认领 引用
13
作者 熊立春 商敏欣 +1 位作者 侯柘 王凤婷 《林业科学》 EI CAS CSCD 北大核心 2026年第4期206-216,共11页
【目的】明确中国木材产业全球价值链地位跃迁的出口隐含碳效应是提升还是拖累,为平衡产业升级与碳中和目标提供科学依据,助力中国在全球绿色价值链重构中占据战略主动。【方法】基于2007—2021年中国30个贸易伙伴国面板数据,构建多维... 【目的】明确中国木材产业全球价值链地位跃迁的出口隐含碳效应是提升还是拖累,为平衡产业升级与碳中和目标提供科学依据,助力中国在全球绿色价值链重构中占据战略主动。【方法】基于2007—2021年中国30个贸易伙伴国面板数据,构建多维度指标评估全球价值链地位和贸易隐含碳强度,采用固定效应模型、机制检验模型等实证检验木材产业全球价值链地位与出口贸易隐含碳排放之间的关系及其作用机制。【结果】中国木材产业全球价值链地位提升能够显著抑制出口贸易隐含碳排放强度,规模、结构、技术水平是减排关键路径,经过稳健型检验和内生性处理,这一结论仍然成立,且存在显著区域异质性,发达国家和贸易小国抑制性更强。【结论】中国木材产业全球价值链地位提升是抑制其出口贸易隐含碳排放强度的有效途径,应努力提高中国木材产业全球价值链地位,大力发挥规模效应、结构优化与技术升级的协同作用。 展开更多
关键词 木材产业 全球价值链地位 出口贸易隐含碳 贸易增加值分解法
暂未订购 下载PDF
贸易摩擦与我国供应链全球转移——基于美国贸易干预措施的研究 认领 引用
14
作者 张鹏杨 刘蕙嘉 林桂军 《统计研究》 CSSCI 北大核心 2026年第7期34-47,共14页
推动供应链合理布局是我国应对贸易摩擦冲击、提升供应链体系安全性和韧性的重要手段。本文基于增加值分解方法创新性地提出了供应链的分析框架和测度思路,考察了我国供应链体系的全球贡献和受美国贸易干预措施影响行业的供应链全球转... 推动供应链合理布局是我国应对贸易摩擦冲击、提升供应链体系安全性和韧性的重要手段。本文基于增加值分解方法创新性地提出了供应链的分析框架和测度思路,考察了我国供应链体系的全球贡献和受美国贸易干预措施影响行业的供应链全球转移模式,实证研究了美国贸易限制政策对我国供应链转移的影响。研究发现,2008—2020年我国供应链体系的全球贡献力快速提升,通过该体系向出口国(地区)增加值供应,以及经由出口国(地区)向第三国(地区)增加值供应是我国供应链全球贡献的主要部分。受美国贸易干预措施影响的行业供应链全球转移趋势较为明显,主要表现为直接转移和间接转移。同时,中美贸易摩擦引发了我国供应链向出口国(地区)的浅度转移,也提升了通过出口国(地区)向未实施相关贸易干预措施的第三国(地区)、向贸易干预措施实施国和向我国返回的深度转移。为规避外部贸易限制风险,我国供应链更倾向于向东南亚国家及美国的近岸国家、与我国签订区域贸易协定的国家和市场规模较大的国家转移。本文在中美贸易摩擦背景下考察我国产业链供应链韧性并提出应对方案具有现实意义。 展开更多
关键词 供应链安全 贸易摩擦 增加值分解方法 供应链转移
暂未订购 下载PDF
海洋工程装备制造业增加值核算方法研究与探索 认领 引用
15
作者 顾云娟 别蒙 方颖 《海洋经济》 2026年第1期18-21,共4页
海洋工程装备产业是落实海洋强国战略的重要支撑,《中共中央关于制定国民经济和社会发展第十五个五年规划的建议》中明确提出要巩固提升海洋装备制造业优势。历年来,海洋工程装备制造业增加值核算因产业分类调整、核算体系不完善、数据... 海洋工程装备产业是落实海洋强国战略的重要支撑,《中共中央关于制定国民经济和社会发展第十五个五年规划的建议》中明确提出要巩固提升海洋装备制造业优势。历年来,海洋工程装备制造业增加值核算因产业分类调整、核算体系不完善、数据收集困难等多重因素制约,核算数据的准确性和完整性受到了直接影响。本文从产业界定与分类模糊、核算体系不健全、标准话语权不足3个方面,深入剖析了该产业增加值核算难点问题,系统研究了产业核算方法,并就做好核算工作提出了针对性建议。 展开更多
关键词 海洋工程装备制造业 核算方法 增加值核算
暂未订购 下载PDF
中国数字文化产业核算问题研究 认领 引用
16
作者 田金方 孙艺玮 +1 位作者 张舒 王云靓 《统计学报》 2026年第6期60-73,共14页
数字文化产业是数字经济与文化产业深度融合的核心业态。针对我国数字文化产业尚未形成统一的统计分类标准与传统的现价投入产出表难以开展跨期动态对比等问题,构建了数字文化产业统计分类标准,编制了2017年、2018年、2020年与2023年可... 数字文化产业是数字经济与文化产业深度融合的核心业态。针对我国数字文化产业尚未形成统一的统计分类标准与传统的现价投入产出表难以开展跨期动态对比等问题,构建了数字文化产业统计分类标准,编制了2017年、2018年、2020年与2023年可比价数字文化投入产出表,核算了数字文化产业的增加值规模、关联效应与经济效应。结果显示:样本期内我国数字文化产业增加值年均增长率约为7.2%,增加值占GDP比重稳定在2.3%;产业关联效应呈现“乘数效应>溢出效应>反馈效应”的特征,数字文化产业兼具强供给驱动与强需求拉动效应;数字文化产业对全社会增加值的综合拉动效应显著高于其自身直接创造的增加值,数字文化产业具有较强的产业溢出效应。 展开更多
关键词 数字文化产业 增加值规模 产业关联效应 经济效应 投入产出法 可比价投入产出表 新型文化业态 文化和科技融合
暂未订购 下载PDF
Numerical analysis of added mass and damping of floating production,storage and offloading system 认领 引用 被引量：10
17
作者 Ke Wang Xi Zhang +1 位作者 Zhi-Qiang Zhang Wang Xu 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第3期870-876,共7页
An integral equation approach is utilized to in- vestigate the added mass and damping of floating produc- tion, storage and offloading system （FPSO system）. Finite water depth Green function and higher-order boundar... An integral equation approach is utilized to in- vestigate the added mass and damping of floating produc- tion, storage and offloading system （FPSO system）. Finite water depth Green function and higher-order boundary ele- ment method are used to solve integral equation. Numeri- cal results about added mass and damping are presented for odd and even mode motions of FPSO. The results show ro- bust convergence in high frequency range and can be used in wave load analysis for FPSO designing and operation. 展开更多
关键词 FPSO. Added mass Damping. Green function Higher-order boundary element method
暂未订购 下载PDF
Suppressing Spatiotemporal Chaos via Non-feedback Pinning Method 认领 引用 被引量：2
18
作者 WU Shun-Guang SANG Hai-Bo HE Kai-Fen 《Chinese Physics Letters》 SCIE EI CAS 2001年第3期341-343,共3页
The spatiotemporal chaos in the system described by a one-dimensional nonlinear-drift wave equation is suppressed by non-feedback pinning method.By adding additive external noise to the controlled state,we find that t... The spatiotemporal chaos in the system described by a one-dimensional nonlinear-drift wave equation is suppressed by non-feedback pinning method.By adding additive external noise to the controlled state,we find that the deviation from the target space-time pattern increases in a power law with noise intensity.The possible controlling mechanism is discussed. 展开更多
关键词 method. additive adding
暂未订购 下载PDF
STUDY OF NUMERICAL AND PHYSICAL FRACTURE WITH SPH METHOD 认领 引用 被引量：2
19
作者 Fei Xu Yah Zhao +1 位作者 Yulong Li Masanori Kikuchi 《Acta Mechanica Solida Sinica》 SCIE EI 2010年第1期49-56,共8页
Two kinds of fractures can be observed in the SPH （smoothed particle hydrodynamics） simulations, which are the physical fracture and the numerical fracture. The physical one exists in reality, while the numerical on... Two kinds of fractures can be observed in the SPH （smoothed particle hydrodynamics） simulations, which are the physical fracture and the numerical fracture. The physical one exists in reality, while the numerical one is fictitious. This paper presents the effects of both fractures and proposes a simple adding particle technique to avoid the numerical fracture. The real physical fracture is then figured out by using an applicable fracture criterion. Firstly, the effect of the numerical fracture on the computational accuracy is investigated by introducing the artificial fracture in a model of wave propagation. Secondly, a simple adding particle technique is proposed and validated by a three dimensional bending test. Finally, the experiments of penetration on the skin of aircrafts are simulated by both the initial SPH method and the improved method with the adding particle technique. The results show that the improved SPH method can describe the physical fracture very well with better accuracy. 展开更多
关键词 SPH method physical fracture numerical fracture adding particle technique
暂未订购 下载PDF
Estimation of Added Resistance for Large Blunt Ship in Waves 认领 引用 被引量：19
20
作者 Wenyang Duan Chuanqing Li 《Journal of Marine Science and Application》 2013年第1期1-12,共12页
Under the background of the energy saving and emission reduction,more and more attention has been placed on investigating the energy efficiency of ships.The added resistance has been noted for being crucial in predict... Under the background of the energy saving and emission reduction,more and more attention has been placed on investigating the energy efficiency of ships.The added resistance has been noted for being crucial in predicting the decrease of speed on a ship operating at sea.Furthermore,it is also significant to investigate the added resistance for a ship functioning in short waves of large modern ships.The researcher presents an estimation formula for the calculation of an added resistance study in short waves derived from the reflection law.An improved method has been proposed to calculate the added resistance due to ship motions,which applies the radiated energy theory along with the strip method.This procedure is based on an extended integral equation(EIE)method,which was used for solving the hydrodynamic coefficients without effects of the irregular frequency.Next,a combined method was recommended for the estimation of added resistance for a ship in the whole wave length range.The comparison data with other experiments indicate the method presented in the paper provides satisfactory results for large blunt ship. 展开更多
关键词 added resistance short waves radiated energy method Salvesen-Tuck-Faltinsen(STF)method extended integral equation(EIE)method large blunt ship
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 37 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈