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环上矩阵的加权Moore-Penrose逆 被引量:2
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作者 刘桂香 《扬州职业大学学报》 2018年第2期31-33,共3页
在复数域上,人们已经证明矩阵A相对于矩阵M,N的加权Moore-Penrose逆A_(MN)^+=A_(R(N-1A*),N(A*M))^(2).本文讨论了环上矩阵的加权Moore-Penrose逆,证明在带有对合反自同构的有单位元的可换环上,A_(MN)^+=A_(R(N-1A*),N(A*M))^(2).
关键词 矩阵 加权moore—Penrose逆 广义逆A T s
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Atomic level deposition to extend Moore’s law and beyond 被引量:9
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作者 Rong Chen Yi-Cheng Li +2 位作者 Jia-Ming Cai Kun Cao Han-Bo-Ram Lee 《International Journal of Extreme Manufacturing》 2020年第2期29-52,共24页
In the past decades,Moore’s law drives the semiconductor industry to continuously shrink the critical size of transistors down to 7 nm.As transistors further downscaling to smaller sizes,the law reaches its limitatio... In the past decades,Moore’s law drives the semiconductor industry to continuously shrink the critical size of transistors down to 7 nm.As transistors further downscaling to smaller sizes,the law reaches its limitation,and the increase of transistors density on the chip decelerates.Up to now,extreme ultraviolet lithography has been used in some key steps,and it is facing alignment precision and high costs for high-volume manufacturing.Meanwhile,the introduction of new materials and 3D complex structures brings serious challenges for top-down methods.Thus,bottom-up schemes are believed to be necessary methods combined with the top-down processes.In this article,atomic level deposition methods are reviewed and categorized to extend Moore’s law and beyond.Firstly,the deposition brings lateral angstrom resolution to the vertical direction as well as top-down etching,such as double patterning,transfer of nanowires,deposition of nanotubes,and so on.Secondly,various template-assisted selective deposition methods including dielectric templates,inhibitors and correction steps have been utilized for the alignment of 3D complex structures.Higher resolution can be achieved by inherently selective deposition,and the underlying selective mechanism is discussed.Finally,the requirements for higher precision and efficiency manufacturing are also discussed,including the equipment,integration processes,scale-up issues,etc.The article reviews low dimensional manufacturing and integration of 3D complex structures for the extension of Moore’s law in semiconductor fields,and emerging fields including but not limited to energy,catalysis,sensor and biomedicals. 展开更多
关键词 moores law atomic level deposition high resolution selective deposition ALIGNMENT
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Science Letters:The Moore’s Law for photonic integrated circuits 被引量:2
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作者 THYLEN L. HE Sailing +1 位作者 WOSINSKI L. DAI Daoxin 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2006年第12期1961-1967,共7页
We formulate a “Moore’s law” for photonic integrated circuits (PICs) and their spatial integration density using two methods. One is decomposing the integrated photonics devices of diverse types into equivalent bas... We formulate a “Moore’s law” for photonic integrated circuits (PICs) and their spatial integration density using two methods. One is decomposing the integrated photonics devices of diverse types into equivalent basic elements, which makes a comparison with the generic elements of electronic integrated circuits more meaningful. The other is making a complex compo- nent equivalent to a series of basic elements of the same functionality, which is used to calculate the integration density for func- tional components realized with different structures. The results serve as a benchmark of the evolution of PICs and we can con- clude that the density of integration measured in this way roughly increases by a factor of 2 per year. The prospects for a continued increase of spatial integration density are discussed. 展开更多
关键词 moores Law Photonic integrated circuit (PIC) Photonic lightwave circuit (PLC) Photonic integration density Photonic filters Photonic multiplexing
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Study on the Development of the Chip Information Industry Based on Moore’s Law
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作者 Guowang Zeng Shihong Zeng 《Journal of Computer and Communications》 2017年第14期39-47,共9页
Chips are the carriers of ICs (integrated circuits). As a result of design, manufacturing, and packaging and testing processes, chips are typically wholly independent entities intended for immediate use. According to ... Chips are the carriers of ICs (integrated circuits). As a result of design, manufacturing, and packaging and testing processes, chips are typically wholly independent entities intended for immediate use. According to known data, one unit of chip output can drive up to ten units of output in the electronic information industry and 100 units of GDP (Gross Domestic Product). The Chip Information Industry is a strategic industry in most developed countries in Europe and North America. The development of the Chip Information Industry is related to national economies and personal livelihoods. Moore discovered a certain trend after analyzing data: in general, every newly produced chip has twice the capacity of the previous generation, and it takes 18 to 24 months for the next generation to be subsequently invented. This trend has come to be known as Moore’s Law. It applies not only to the development of memory chips but also to the evolutionary paths of processor capability and disk drive storage capacity. Moore’s Law has become the basis of performance prediction in several industries. However, since 2011, the size of silicon transistors has been approaching its physical limit at the atomic level. Due to the nature of silicon, additional breakthroughs in the running speed and performance of silicon transistors are severely limited. Elevated temperature and leakage are the two main sources that invalidate Moore’s Law. To counter these issues, This paper analyzes specific problems challenges in the Chip Information Industry, including the development of carbon nanotube chips and fierce competition in the international Chip Information Industry. In addition, this paper undertakes a critical analysis of the Chinese Chip Information Industry and countermeasures to Chinese Chip Information Industry development. 展开更多
关键词 moores LAW CHIP Integrated CIRCUITs CHIP INFORMATION INDUsTRY Development
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New Approach to Deep Miniaturization: A Way to Overcoming Moore’s Law
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作者 Maria K. Koleva 《Journal of Modern Physics》 2021年第3期167-178,共12页
The matter about some far-going consequences commencing from the replacement of one of the basic principles of the traditional physics that is the principle of locality, with the recently put forward principle of boun... The matter about some far-going consequences commencing from the replacement of one of the basic principles of the traditional physics that is the principle of locality, with the recently put forward principle of boundedness is considered. It is proven that the thermodynamic theory which is explicitly grounded on the principle of locality, suffers inherent contradiction which roots lay down to the principle of locality. The way to overcome it goes via the replacement of the principle of locality with the recently put forward by the author principle of boundedness. In turn, the latter gives rise not only to a fundamentally novel notion for a number of ideas but also it yields replacement of the proportionality between the software and hardware components with a new non-extensive approach to the matter. It is proven that the famous Moore’s law stands in new reading both in its support and the way to overcome its limitations. Apart from its role for the technical applications, the present considerations stand also as a methodological example how the role of the basics of any theory affects practical rules such as the Moore’s law. 展开更多
关键词 Principle of Locality Principle of Boundedness moores Law Decomposition Theorem Chemical Potential semantic Intelligence
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G-Phenomena as a Base of Scalable Distributed Computing—G-Phenomena in Moore’s Law
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作者 Karolj Skala Davor Davidovic +1 位作者 Tomislav Lipic Ivan Sovic 《International Journal of Internet and Distributed Systems》 2014年第1期1-4,共4页
Today we witness the exponential growth of scientific research. This fast growth is possible thanks to the rapid development of computing systems since its first days in 1947 and the invention of transistor till the p... Today we witness the exponential growth of scientific research. This fast growth is possible thanks to the rapid development of computing systems since its first days in 1947 and the invention of transistor till the present days with high performance and scalable distributed computing systems. This fast growth of computing systems was first observed by Gordon E. Moore in 1965 and postulated as Moore’s Law. For the development of the scalable distributed computing systems, the year 2000 was a very special year. The first GHz speed processor, GB size memory and GB/s data transmission through network were achieved. Interestingly, in the same year the usable Grid computing systems emerged, which gave a strong impulse to a rapid development of distributed computing systems. This paper recognizes these facts that occurred in the year 2000, as the G-phenomena, a millennium cornerstone for the rapid development of scalable distributed systems evolved around the Grid and Cloud computing paradigms. 展开更多
关键词 Historical Development of Computing G-Phenomena moores Law Distributed Computing sCALABILITY Grid Computing Cloud Computing Component
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Moore响度计算模型的改进 被引量:6
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作者 马元锋 陈克安 《应用声学》 CSCD 北大核心 2009年第1期59-65,共7页
与早期响度的图表计算方法相比,Moore计算模型是基于解析式的并且实现了响度值随频率、强度改变的连续计算,因此使用起来非常方便;然而,Moore模型计算公式中基本参数值的确定所依据的闻阈标准数据已被修订,并且最新研究表明,Moore模型... 与早期响度的图表计算方法相比,Moore计算模型是基于解析式的并且实现了响度值随频率、强度改变的连续计算,因此使用起来非常方便;然而,Moore模型计算公式中基本参数值的确定所依据的闻阈标准数据已被修订,并且最新研究表明,Moore模型在确定α值时所做的假设是不合理的;因此本文中(1)提出了利用耳蜗输入输出函数以确定响度函数的方法;(2)根据多个频率处的响度函数重新估计了Moore模型的参数α;(3)根据最新的闻阈标准数据和新的机理重新修订了其它基本参数;(4)利用新的模型重新计算了等响曲线并与原有模型的结果以及最新国际标准进行了对比。结论表明对1~8kHz之间的计算结果有了较大的修订,特别是能很好地预测1~2kHz之间的凸起。 展开更多
关键词 moore模型 响度函数 耳蜗I/O函数
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棉铃虫中肠谷胱甘肽S-转移酶(GST)对新疆一枝蒿黄酮提取物和萜类提取物的响应 被引量:2
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作者 何海 朱燕 +2 位作者 刘宁 晁群芳 刘小宁 《新疆农业科学》 CAS CSCD 北大核心 2012年第12期2254-2262,共9页
【目的】研究新疆一枝蒿提取物黄酮及萜类提取物对棉铃虫解毒酶谷胱甘肽S-转移酶(GST)的影响,探明外源有毒物质对该解毒酶表达规律的影响,阐明棉铃虫与植物次生物质相互作用的机制,为发展新型无公害植物源农药提供理论依据。【方法】从... 【目的】研究新疆一枝蒿提取物黄酮及萜类提取物对棉铃虫解毒酶谷胱甘肽S-转移酶(GST)的影响,探明外源有毒物质对该解毒酶表达规律的影响,阐明棉铃虫与植物次生物质相互作用的机制,为发展新型无公害植物源农药提供理论依据。【方法】从新疆一枝蒿中分离提纯黄酮与萜类提取物,以室内饲养棉铃虫(3龄幼虫)为对象,利用生物测定、实时荧光定量PCR及酶联免疫吸附测定法,分别测定新疆一枝蒿中黄酮与萜类提取物对棉铃虫的毒杀效果及其在mRNA水平和蛋白水平上对GSr表达的影响。【结果】黄酮和萜类提取物对棉铃虫3龄幼虫在24 h时的半致死浓度LC_(50)分别是21.4和4.1 mg/100 g,在48 h时的半致死浓度LC_(50)分别是19.3和3.1 mg/100 g;实时荧光定量PCR结果表明GST在mRNA水平的表达量受到诱导,时间效应为当黄酮和萜类提取物浓度分别为20和2 mg/100 g时,GsT在12 h时能够被两种物质显著诱导表达,而在24 h时表达受到抑制;浓度效应为在18 h时,黄酮和萜类提取物浓度分别为20和2 mg/100 g时显著诱导GST的表达,而在40和4 mg/100 g时抑制GST的表达;酶联免疫吸附测定结果表明,萜类和黄酮在时间和浓度效应上都能显著诱导GSI蛋白表达,并且蛋白水平在时间与浓度效应中的表达趋势与mRNA水平相类似。【结论】GST对外源物质新疆一枝蒿的黄酮提取物和萜类提取物存在积极响应,低浓度或短时间内黄酮和萜类均能诱导GSI的过表达,从而化解外源毒性,而浓度过高或时间过长则抑制其表达。 展开更多
关键词 新疆一枝蒿 棉铃虫 谷胱甘肽s-转移酶 生物测定 表达规律
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广义逆A_(T,S)^(2)的几种秩关系式 被引量:1
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作者 孙劼 王国荣 《纯粹数学与应用数学》 CSCD 北大核心 2008年第3期477-484,584,共9页
利用矩阵A的广义逆A_(T,S)^(2)的Moore-Penrose逆表示式,得到了与广义逆A_(T,S)^(2)相关的几种秩等式和不等式,并由此得到了加权Moore-Pensore逆,Moore-Pensore逆,Drazin逆及群逆的相应结论.
关键词 广义逆AT s^(2) moore-PENROsE逆 加权moore-Pensore逆 DRAZIN逆 群逆
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左右逆特征值问题及其最佳逼近问题的(R,S)对称矩阵解 被引量:1
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作者 尹凤 黄光鑫 《成都理工大学学报(自然科学版)》 CAS CSCD 北大核心 2012年第5期559-562,共4页
令R∈Cm×m和S∈Cn×n是2个非平凡卷积矩阵,即R=R-1≠±Im,且S=S-1≠±In。如果一个矩阵A∈Cm×n满足RAS=A,则矩阵A称为(R,S)对称矩阵。本文首先分别给出了左右逆特征值问题的(R,S)对称矩阵解的可解条件和一般表达... 令R∈Cm×m和S∈Cn×n是2个非平凡卷积矩阵,即R=R-1≠±Im,且S=S-1≠±In。如果一个矩阵A∈Cm×n满足RAS=A,则矩阵A称为(R,S)对称矩阵。本文首先分别给出了左右逆特征值问题的(R,S)对称矩阵解的可解条件和一般表达式;然后,给出了左右逆特征值问题相应的最佳逼近问题的(R,S)对称矩阵解。 展开更多
关键词 左右逆特征值问题 最佳逼近问题 (R s)对称矩阵 moore-PENROsE逆
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FPSO系泊索疲劳寿命影响因素分析 被引量:3
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作者 林风梅 《金属制品》 2014年第3期51-55,60,共6页
以南海某石油开采区块螺旋股钢丝绳为例,采用Miner线性损伤累积理论和螺旋股的S-N曲线对螺旋股钢丝绳系泊索的疲劳寿命进行预测。给出FPSO系泊索疲劳寿命影响因素:(1)腐蚀是影响系泊索轴向拉伸疲劳寿命的主要外在因素。钢丝绳在海水中... 以南海某石油开采区块螺旋股钢丝绳为例,采用Miner线性损伤累积理论和螺旋股的S-N曲线对螺旋股钢丝绳系泊索的疲劳寿命进行预测。给出FPSO系泊索疲劳寿命影响因素:(1)腐蚀是影响系泊索轴向拉伸疲劳寿命的主要外在因素。钢丝绳在海水中的疲劳寿命比在空气中降低82%。(2)钢丝绳设计水平、制造质量、盘条质量是影响系泊索疲劳寿命的内在因素。在钢丝绳设计、制造过程中应注意保证钢丝绳的刚度、自重、最小破断力达到初始设计要求。可以采用钢丝表面镀锌、挤塑护套、良好的润滑/阻滞物、牺牲阳极及外加电流系统等降低钢丝绳的腐蚀速度,提高钢丝绳的疲劳寿命。 展开更多
关键词 FPsO系泊系统 线性累积损伤 s-N曲线 螺旋股系泊索 疲劳寿命 腐蚀
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S-spar平台垂荡板数目确定及立管系泊系统耦合分析 被引量:2
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作者 孙洁莹 张淑华 +1 位作者 陈辉 封磊 《船海工程》 北大核心 2018年第1期89-93,共5页
考虑到目前S-spar平台垂荡板数目是参考Truss Spar平台3块垂荡板的设计,而未结合平台本身特性进行深入研究,因此基于SESAM对S-spar平台进行频域分析,确定S-spar平台采用4块垂荡板更为合适。在4块垂荡板的S-spar平台频域分析的基础上,对... 考虑到目前S-spar平台垂荡板数目是参考Truss Spar平台3块垂荡板的设计,而未结合平台本身特性进行深入研究,因此基于SESAM对S-spar平台进行频域分析,确定S-spar平台采用4块垂荡板更为合适。在4块垂荡板的S-spar平台频域分析的基础上,对系泊系统及立管进行耦合分析,对比有无立管情况,发现考虑立管后平台各自由度上运动显著减小。为解决立管张力过大的问题,在立管上安装浮子,讨论浮子位置、浮子浮力对立管张力的影响,确定安装500 k N的浮子在距立管悬垂段距顶端65%处为最优方案。 展开更多
关键词 s-spar平台 垂荡板 耦合分析 张紧式系泊 立管张力 浮子
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Quality of healing of gastric ulcers: Natural products beyond acid suppression 被引量:17
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作者 Napapan Kangwan Jong-Min Park +1 位作者 Eun-Hee Kim Ki Baik Hahm 《World Journal of Gastrointestinal Pathophysiology》 CAS 2014年第1期40-47,共8页
Gastric ulcer is a chronic disease featured with unexpected complications, including bleeding, stenosis and perforation, as well as a high incidence of recurrence. Clinical treatments for gastric ulcer have allowed th... Gastric ulcer is a chronic disease featured with unexpected complications, including bleeding, stenosis and perforation, as well as a high incidence of recurrence. Clinical treatments for gastric ulcer have allowed the rapid development of potent anti-ulcer drugs during the last several decades. Gastric ulcer healing is successful with conventional treatments including H2-receptor antagonists, and proton pump inhibitors(PPIs) have been essential for ulcer healing and prevention of complications. Additionally, Helicobacter pylori eradication therapy is effective in reducing ulcer recurrence and leads to physiological changes in the gastric mucosa which affect the ulcer healing process. However, in spite of these advancements, some patients have suf-fered from recurrence or intractability in spite of continuous anti-ulcer therapy. A new concept of the quality of ulcer healing(QOUH) was initiated that considers the reconstruction of the mucosal structure and its function for preventing ulcer recurrence. Although several gastroprotection provided these achievements of the QOUH, which PPI or other acid suppressants did not accomplish, we found that gastroprotection that originated from natural products, such as a newer formulation from either Artemisia or S-allyl cysteine from garlic, were very effective in the QOUH, as well as improving clinical symptoms with fewer side effects. In this review, we will introduce the importance of the QOUH in ulcer healing and the achievements from natural products. 展开更多
关键词 QUALITY of ulcer HEALING Natural products Gastric ULCERs Acid suppression s-allyl cysteine artemisia IsOPROPANOL extract
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The fabrication of ideal diamond disk(IDD)by casting diamond film on silicon wafer 被引量:1
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作者 Chen Ying-Tung Sung James C. +2 位作者 Kan Ming-Chi Chang Hsiao-Kuo Sung Michael 《金刚石与磨料磨具工程》 CAS 北大核心 2008年第S1期130-133,142,共5页
With the relentless densification of interconnected circuitry dictated by Moore’ s Law,the CMP manufacture of such delicate wafers requires the significant reduction of polishing pressure of integrated circuits,not o... With the relentless densification of interconnected circuitry dictated by Moore’ s Law,the CMP manufacture of such delicate wafers requires the significant reduction of polishing pressure of integrated circuits,not only globally,but also locally on every tip of the pad asperities.Conventional diamond disks used for dressing the polyurethane pads cannot produce asperities to achieve such uniformity.A new design of diamond disk was fabricated by casting diamond film on a silicon wafer that contains patterned etching pits. This silicon mold was subsequently removed by dissolution in a hydroxide solution.The diamond film followed the profile of the etching pits on silicon to form pyramids of identical in size and shape.The variation of their tip heights was in microns of single digit that was about one order of magnitude smaller than conventional diamond disks for CMP production.Moreover,the diamond film contained no metal that might contaminate the circuits on polished wafer during a CMP operation.The continuous diamond film could resist any corrosive attack by slurry of acid or base.Consequently,in-situ dressing during CMP is possible that may improve wafer uniformity and production throughput.This ideal diamond disk(IDD) is designed for the future manufacture of advanced semiconductor chips with node sizes of 32 nm or smaller. 展开更多
关键词 CMP pad CONDITIONER DIAMOND film CVD moores Law 32 nm node
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High pressure CMP with low stress polishing
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作者 Hiroshi Ishizuka Sung James C. +2 位作者 Marehito Aoki Haedo Jeong Sung Michael 《金刚石与磨料磨具工程》 CAS 北大核心 2008年第S1期119-125,129,共8页
Low stress polishing is required for the manufacture of advanced integrated circuits(IC) with node sizes of 45 nm and smaller.However,the CMP community achieved the low stress by reducing the down force that press the... Low stress polishing is required for the manufacture of advanced integrated circuits(IC) with node sizes of 45 nm and smaller.However,the CMP community achieved the low stress by reducing the down force that press the wafer against a rotating pad.The reduced down force also decrease the removal rate of the wafer. As a result,the productivity suffers.In order to cope with this problem,an electrical potential is applied to the copper layer during polishing,in this case,the chemical oxidation is accelearated and hence the removal rate. Alternatively,the rotating pad must be softened to minimize the defects of wafers caused by CMP. In this research,we report a simpler solution to achieve low stress polishing without investing in new equipment and in developing new pad materials.The conventional CMP is proceeded by dressing the pad with a PCD dresser that can form 10×more asperities on the pad surface.The fluffy surface can then polish delicate IC without using the brutal force.As a result,the removal rate of wafers can be maintained without causing defectivity on the IC layer. 展开更多
关键词 IC CMP eCMP PCD DREssER moores Law 32nm NODE
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Micro/Nano-Satellites: Opportunities and Challenges 被引量:1
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作者 CHEN Xiaoqian ZHAO Yong +2 位作者 ZHU Xiaozhou BAI Yuzhu ZHANG Yulin 《Aerospace China》 2016年第2期45-51,共7页
At an accelerating development pace, Hicro-Nano Satellite technology has become one of the most ac- tive research topics in the current aerospace field. Its applications have been extended from engineering education a... At an accelerating development pace, Hicro-Nano Satellite technology has become one of the most ac- tive research topics in the current aerospace field. Its applications have been extended from engineering education and technology demonstration into various other fields, such as communication, remote sensing, navigation and scientific experiments just to name a few, In this paper issues raised on Micro/Nano-Satellites in recent news are reviewed and the opportunities and challenges confronting Micro/Nano-Satellites are analyzed. Then the Plicro/nano-Satellites of Na- tional University of Defense Technology, (NUDT) are briefly introduced. Finally, some suggestions on the development of Micro/Nano-Satellites in the future are proposed. 展开更多
关键词 Micro/Nano-satellites Design moores Law
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矩阵广义逆A{2,3}s,A{2,4}s的构造 被引量:1
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作者 范庆民 《山西矿业学院学报》 1996年第2期181-184,共4页
介绍复矩阵Am×n的Moore-Penrose广义逆A+的一些基本理论,并且利用Moore-Penrose广义逆给出A{2,3}s,A{2。
关键词 moore-Penrose广义逆矩阵 存在 构造
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无结场效应管——新兴的后CMOS器件研究进展
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作者 肖德元 张汝京 《固体电子学研究与进展》 CAS CSCD 北大核心 2016年第2期87-98,共12页
迄今为止,现有的晶体管都是基于PN结或肖特基势垒结而构建的。在未来的几年里,CMOS制造技术的进步将导致器件的沟道长度小于10nm。在这么短的距离内,为使器件能够工作,将不得不采用非常高的掺杂浓度梯度。进入纳米领域,常规CMOS器件所... 迄今为止,现有的晶体管都是基于PN结或肖特基势垒结而构建的。在未来的几年里,CMOS制造技术的进步将导致器件的沟道长度小于10nm。在这么短的距离内,为使器件能够工作,将不得不采用非常高的掺杂浓度梯度。进入纳米领域,常规CMOS器件所面临的许多问题都与PN结相关,传统的按比例缩小将不再足以继续通过制造更小的晶体管而获得器件性能的提高。半导体工业界正在努力从器件几何形状,结构以及材料方面寻求新的解决方案。文中研究了无结场效应器件制备工艺技术及其进展,这些器件包括半导体无结场效应晶体管、量子阱场效应晶体管、碳纳米管场效应晶体管、石墨烯场效应晶体管、硅烯场效应晶体管、二维半导体材料沟道场效应晶体管和真空沟道场效应管等。这些器件有可能成为适用于10nm及以下技术节点乃至按比例缩小的终极器件。 展开更多
关键词 摩尔定律 CMOs器件 无结场效应管 量子阱场效应晶体管 碳纳米管场效应晶体管 石墨烯场效应晶体管 二维半导体场效应晶体管 真空沟道场效应管
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超长尺度浮式防波堤多模块耦合动力响应分析
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作者 张永彬 嵇春艳 郭建廷 《船舶工程》 CSCD 北大核心 2024年第6期144-152,共9页
为研究多模块浮式防波堤模块之间的耦合动力响应规律,基于目标海域环境条件,提出一种能够提供特大掩护水域的超长尺度浮式防波堤总布置设计方案,并对超长尺度浮式防波堤的构型、连接结构及系泊系统进行设计。在此基础上,基于三维势流理... 为研究多模块浮式防波堤模块之间的耦合动力响应规律,基于目标海域环境条件,提出一种能够提供特大掩护水域的超长尺度浮式防波堤总布置设计方案,并对超长尺度浮式防波堤的构型、连接结构及系泊系统进行设计。在此基础上,基于三维势流理论对超长尺度浮式防波堤的水动力性能进行频域和时域分析,考虑环境载荷作用下浮式防波堤多模块耦合运动,并对其中间及两侧模块的运动响应及系泊缆张力进行对比分析。研究结果表明:横浪和斜浪工况下,超长尺度浮式防波堤中间模块在垂荡、横摇和纵摇方向上的运动均最剧烈。由于防波堤首部模块在横浪和斜浪工况下横荡运动最剧烈,因此浮式防波堤首部模块迎浪运动侧系泊缆在2种工况下所受张力最大,这在超长尺度浮式防波堤系泊系统设计过程中需重点关注。数值模拟结果可为此后超长尺度浮式防波堤设计及工程化应用提供技术支撑。 展开更多
关键词 超长尺度浮式防波堤 总体设计 运动响应 系泊缆张力
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干旱胁迫对不同种源油蒿幼苗的生长和形态可塑性的影响 被引量:15
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作者 王林龙 李清河 +1 位作者 徐军 朱雅娟 《东北林业大学学报》 CAS CSCD 北大核心 2015年第10期55-57,78,共4页
选取3个种源毛乌素沙地、库布齐沙漠、草原荒漠过渡带的油蒿为试验材料,进行不同水分处理,研究不同种源油蒿对干旱胁迫的形态可塑性响应模式,以及比较不同种源油蒿的形态可塑性指数。结果表明:3个种源地油蒿的相对生长率、根冠比和比叶... 选取3个种源毛乌素沙地、库布齐沙漠、草原荒漠过渡带的油蒿为试验材料,进行不同水分处理,研究不同种源油蒿对干旱胁迫的形态可塑性响应模式,以及比较不同种源油蒿的形态可塑性指数。结果表明:3个种源地油蒿的相对生长率、根冠比和比叶面积对干旱胁迫的形态可塑性响应模式相似,表现为随着干旱程度加剧,油蒿的相对生长率和比叶面积呈减小的趋势,根冠比呈增大的趋势;而3个种源地油蒿表型可塑性指数无显著差异,而平均形态可塑性指数大小存在一定的差异,如库布齐沙漠油蒿的平均形态可塑性指数大于毛乌素沙地油蒿。综上所述,不同种源地油蒿的形态特征在干旱环境条件下,表现出相似的可塑性响应模式。 展开更多
关键词 油蒿 相对生长率 根冠比 比叶面积 形态可塑性
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