针对振荡浮子式WEC(Wave Energy Conversion,波浪能转换)装置的传动机构方案设计需求,提出了一种对传动方案在归一化条件下进行评价及优选的方法,并对目标方案进行设计和优化。首先,分析对比了常用传动机构设计方案的特点;然后,以最适...针对振荡浮子式WEC(Wave Energy Conversion,波浪能转换)装置的传动机构方案设计需求,提出了一种对传动方案在归一化条件下进行评价及优选的方法,并对目标方案进行设计和优化。首先,分析对比了常用传动机构设计方案的特点;然后,以最适用传动方案为目标,以转换效率、安装维护性、系统稳定性、可拓展性为评价指标,以双杆、四杆、六杆和八杆机构为备选方案,建立了传动机构的归一化评价分析模型,运用递阶层次分析方法,进行了一致性条件检验评价,优选出了在给定指标下的传动机构类别;最后,利用MATLAB平台,对选定的六杆机构进行了优化设计,得到了关键设计变量的最优解,为该类机构的工程化设计提供了参考。展开更多
Based on irreversible thermodynamics, the criterion for judging the satisfaction of consistency conditions in rate-dependent constitutive relationship is deduced by introducing four basic hypotheses. Formulas for solv...Based on irreversible thermodynamics, the criterion for judging the satisfaction of consistency conditions in rate-dependent constitutive relationship is deduced by introducing four basic hypotheses. Formulas for solving internal variables are given. It makes the rate-dependent model applicable no matter whether the consistency conditions can be satisfied or not.展开更多
This paper presents new definitions of stability of solutions to singular systems with delay, and establishes theorems on stability and instability. Then by discussing second order timervarying linear singular systems...This paper presents new definitions of stability of solutions to singular systems with delay, and establishes theorems on stability and instability. Then by discussing second order timervarying linear singular systems with delay, this paper obtains some results of stability and instability, and discovers bifurcation-likephenomenons on stability.展开更多
During an interview at the Niels Bohr Institute David Bohm stated, “according to Einstein, particles should eventually emerge … as singularities, or very strong regions of stable pulses of (the gravitational) field...During an interview at the Niels Bohr Institute David Bohm stated, “according to Einstein, particles should eventually emerge … as singularities, or very strong regions of stable pulses of (the gravitational) field” [1]. Starting from this premise, we show spacetime, indeed, manifests stable pulses (n-valued gravitons) that decay into the vacuum energy to generate all three boson masses (including Higgs), as well as heavy-quark mass;and all in precise agreement with the 2010 CODATA report on fundamental constants. Furthermore, our relativized quantum physics approach (RQP) answers to the mystery surrounding dark energy, dark matter, accelerated spacetime, and why ordinary matter dominates over antimatter.展开更多
文摘针对振荡浮子式WEC(Wave Energy Conversion,波浪能转换)装置的传动机构方案设计需求,提出了一种对传动方案在归一化条件下进行评价及优选的方法,并对目标方案进行设计和优化。首先,分析对比了常用传动机构设计方案的特点;然后,以最适用传动方案为目标,以转换效率、安装维护性、系统稳定性、可拓展性为评价指标,以双杆、四杆、六杆和八杆机构为备选方案,建立了传动机构的归一化评价分析模型,运用递阶层次分析方法,进行了一致性条件检验评价,优选出了在给定指标下的传动机构类别;最后,利用MATLAB平台,对选定的六杆机构进行了优化设计,得到了关键设计变量的最优解,为该类机构的工程化设计提供了参考。
基金the National Natural Science Foundation of China(No.59739180)the Foundation of National Key Laboratory of Coastal and Offshore Engineering of Dalian University of Technology(No.9701)
文摘Based on irreversible thermodynamics, the criterion for judging the satisfaction of consistency conditions in rate-dependent constitutive relationship is deduced by introducing four basic hypotheses. Formulas for solving internal variables are given. It makes the rate-dependent model applicable no matter whether the consistency conditions can be satisfied or not.
文摘This paper presents new definitions of stability of solutions to singular systems with delay, and establishes theorems on stability and instability. Then by discussing second order timervarying linear singular systems with delay, this paper obtains some results of stability and instability, and discovers bifurcation-likephenomenons on stability.
文摘During an interview at the Niels Bohr Institute David Bohm stated, “according to Einstein, particles should eventually emerge … as singularities, or very strong regions of stable pulses of (the gravitational) field” [1]. Starting from this premise, we show spacetime, indeed, manifests stable pulses (n-valued gravitons) that decay into the vacuum energy to generate all three boson masses (including Higgs), as well as heavy-quark mass;and all in precise agreement with the 2010 CODATA report on fundamental constants. Furthermore, our relativized quantum physics approach (RQP) answers to the mystery surrounding dark energy, dark matter, accelerated spacetime, and why ordinary matter dominates over antimatter.
