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Optimal Neuro-Control Strategy for Nonlinear Systems With Asymmetric Input Constraints

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 575-583页

作者： xiong Yang bo Zhao School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Systems Science Beijing Normal UniversityBeijing 100875China

In this paper,we present an optimal neuro-control scheme for continuous-time(CT)nonlinear systems with asymmetric input ***,we introduce a discounted cost function for the CT nonlinear systems in order to handle the asymmetric input ***,we develop a Hamilton-Jacobi-Bellman equation(HJBE),which arises in the discounted cost optimal control *** obtain the optimal neurocontroller,we utilize a critic neural network(CNN)to solve the HJBE under the framework of reinforcement *** CNN's weight vector is tuned via the gradient descent *** on the Lyapunov method,we prove that uniform ultimate boundedness of the CNN's weight vector and the closed-loop system is ***,we verify the effectiveness of the present optimal neuro-control strategy through performing simulations of two examples.

关键词： Adaptive critic designs(ACDs) asymmetric input constraint critic neural network(CNN),nonlinear systems optimal control reinforcement learning(RL)

氮磷肥对扁穗雀麦鲜草产量和蛋白质含量的影响

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湖北农业科学 2017年第11期56卷 2100-2104页

作者：田宏邵麟惠熊军波张鹤山刘洋湖北省农业科学院畜牧兽医研究所/动物胚胎工程及分子育种湖北省重点实验室武汉430064 中国农业科学院北京畜牧兽医研究所北京100193

采用二次通用旋转组合设计,研究氮磷肥对江夏扁穗雀麦(Bromus cartharticus Vahl.)鲜草产量和蛋白质含量的影响。结果表明,氮肥的影响作用大于磷肥,且差异达极显著水平(P<0.01)。随着施氮量的增加,鲜草产量表现为增加趋势,但在不同的施... 详细信息

采用二次通用旋转组合设计,研究氮磷肥对江夏扁穗雀麦(Bromus cartharticus Vahl.)鲜草产量和蛋白质含量的影响。结果表明,氮肥的影响作用大于磷肥,且差异达极显著水平(P<0.01)。随着施氮量的增加,鲜草产量表现为增加趋势,但在不同的施量水平下增加幅度略有不同;对于粗蛋白质含量而言,施氮量在108.7~434.8 kg/hm^2之间表现为增加,之后随着施肥量的增加蛋白质含量降低。磷肥对江夏扁穗雀麦鲜草产量有增加作用,但影响差异不显著。磷氮肥对江夏扁穗雀麦粗蛋白质含量存在互作,当处于低氮水平时,增施磷肥可促进其蛋白质含量增加,但在中、高氮水平下则表现为先增后减的趋势。综合考虑产量和品质,江夏扁穗雀麦施氮量以中等水平为宜(217.4~434.8 kg/hm^2),而施少量磷肥(250.0 kg/hm^2)可与氮素共同改善牧草品质。

关键词：氮磷肥扁穗雀麦(Bromus cartharticus Vahl.) 鲜草产量蛋白质含量

Driving forces and their relative contributions to hydrocarbon expulsion from deep source rocks: A case of the Cambrian source rocks in the Tarim Basin

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Petroleum Science 2023年第1期20卷 20-33页

作者： bo Pang jun-Qing Chen xiong-Qi Pang Tao Hu Yue Sheng State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China College of Geosciences China University of PetroleumBeijing102249China College of Science China University of PetroleumBeijing102249China Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing102249China Basic Research Center for Energy Interdisciplinary China University of PetroleumBeijing102249China CNPC Economics&Technology Research Institute Beijing100029China

To thoroughly understand the dynamic mechanism of hydrocarbon expulsion from deep source rocks,in this study,five types of hydrocarbon expulsion dynamics(thermal expansion,hydrocarbon diffusion,compaction,product volume expansion,and capillary pressure difference(CPD))are studied.A model is proposed herein to evaluate the relative contribution of different dynamics for hydrocarbon expulsion using the principle of mass balance,and the model has been applied to the Cambrian source rocks in the Tarim *** evaluation results show that during hydrocarbon expulsion from the source rocks,the relative contribution of CPD is the largest(>50%),followed by compaction(10%-40%),product volume expansion(5%-30%),and thermal expansion(2%-20%).The relative contribution of diffusion to hydrocarbon expulsion is minimal(bon expulsion process of deep source *** hydrocarbon expulsion process of source rocks can be categorized into three stages based on the contribution of different dynamics to the process:the first stage is dominated by compaction and diffusion to expel hydrocarbons,the second stage is dominated by product volume expansion and CPD,and the third stage is dominated by product volume expansion and *** research offers new insights into hydrocarbon exploration in tight oil and gas reservoirs.

关键词： Driving force Dynamic mechanism Hydrocarbon expulsion Deep oil and gas exploration Tarim Basin

The electrochemical advanced oxidation processes coupling of oxidants for organic pollutants degradation: A mini-review

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Chinese Chemical Letters 2019年第12期30卷 2139-2146页

作者： jun Li Yangju Li Zhaokun xiong Gang Yao bo Lai State Key Laboratory of Hydraulics and Mountain River Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Sino-German Centre for Water and Health Research Sichuan UniversityChengdu 610065China Institute of Environmental Engineering RWTH Aachen UniversityAachen 52072Germany

The electrochemical advanced oxidation processes(EAOPs) have been extensively applied in the treatment of organic pollutants ***,the mini review provides the coupling systems about EAOPs and different oxidants(e.g.,persulfate(PS),peroxymonosulfate(PMS),and ozone(O3)),including EAOPs-PS systems,EAOPs-PMS systems,EAOPs-peroxone systems,and photoelectro-oxidants systems,for the organic compounds *** coupling system of EAOPs with oxidants is an effective way to improve the generated free radicals(e.g.,HO^·and SO4^·-) concentration and to accelerate pollutant *** this review,we make a summary of the homogeneous and heterogeneous EAOPs-oxidant *** reaction mechanisms of EAOPs combined with different oxidants are elucidated in detail,as well as the synergistic effect for improving the degradation and mineralization efficiency.

关键词： Electrochemical advanced oxidation processes Organic compounds Oxidants Free radicals Reaction mechanism

Structure and dynamics of binary bose−Einstein condensates with vortex phase imprinting

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Frontiers of physics 2023年第6期18卷 241-251页

作者： Jianchong Xing Wenkai Bai bo xiong jun-Hui Zheng Tao Yang Shaanxi Key Laboratory for Theoretical Physics Frontiers Institute of Modern PhysicsNorthwest UniversityXi’an 710127China School of Science Wuhan University of TechnologyWuhan 430070China Peng Huanwu Center for Fundamental Theory Xi’an 710127China

The combination of multi-component bose−Einstein condensates(BECs)and phase imprinting techniques provides an ideal platform for exploring nonlinear dynamics and investigating the quantum transport properties of *** this paper,we study abundant density structures and corresponding dynamics of phase-separated binary bose−Einstein condensates with phase-imprinted single vortex or vortex *** adjusting the ratio between the interspecies and intraspecies interactions,and the locations of the phase singularities,the typical density profiles such as ball-shell structures,crescent-gibbous structures,Matryoshka-like structures,sector-sector structures and sandwich-type structures appear,and the phase diagrams are *** dynamics of these structures exhibit diverse properties,including the penetration of vortex dipoles,emergence of half-vortex dipoles,co-rotation of sectors,and oscillation between *** pinning effects induced by a potential defect are also discussed,which is useful for controlling and manipulating individual quantum states.

关键词： bose−Einstein condensates phase separation angular momentum energy competition

A robust and efficient structural reliability method combining radial-based importance sampling and Kriging

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Science China(Technological Sciences) 2018年第5期61卷 724-734页

作者： xiong bo TAN HuiFeng Center for Composite Materialsa nd Structures Harbin Institute of Technology

Simulation based structural reliability analysis suffers from a heavy computational burden, as each sample needs to be evaluated on the performance function, where structural analysis is performed. To alleviate the computational burden, related research focuses mainly on reduction of samples and application of surrogate model, which substitutes the performance function. However,the reduction of samples is achieved commonly at the expense of loss of robustness, and the construction of surrogate model is computationally expensive. In view of this, this paper presents a robust and efficient method in the same direction. The present method uses radial-based importance sampling (RBIS) to reduce samples without loss of robustness. Importantly, Kriging is fully used to efficiently implement RBIS. It not only serves as a surrogate to classify samples as we all know, but also guides the procedure to determine the optimal radius, with which RBIS would reduce samples to the highest degree. When used as a surrogate, Kriging is established through active learning, where the previously evaluated points to determine the optimal radius are reused. The robustness and efficiency of the present method are validated by five representative examples, where the present method is compared mainly with two fundamental reliability methods based on active learning Kriging.

关键词： structural reliability simulation radial-based importance sampling Kriging active learning

Localized Asymmetric Atomic Matter Waves in Two-Component bose-Einstein Condensates Coupled with Two-Photon Microwave Field

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Communications in Theoretical Physics 2008年第5期49卷 1225-1228页

作者： xiong bo Beijing National Laboratory for Condensed Matter Physics Institute of Physics the Chinese Academy of SciencesBeijing 100080 China

We investigate localized atomic matter waves in the two-photon microwave field. Interestingly, the oscillations two-component bose-Einstein condensates coupled by of localized atomic matter waves will gradually decay and finally become non-oscillating behavior even if existing coupling field. In particular, atom numbers occupied in two different hyperfine spin states will appear asymmetric occupations after some time evolution.

关键词： bose Einstein condensate Feshbach resonance soliton Josephson effect

河南省纤毛鹅观草种质资源表型多样性分析及综合评价

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南方农业学报 2024年第10期55卷 3003-3012页

作者：张鹤山吴新江郭胜华田宏熊军波陆姣云刘洋湖北省农业科学院畜牧兽医研究所/动物胚胎工程及分子育种湖北省重点实验室湖北武汉430064 湖北省林业局林木种苗管理总站湖北武汉430075

【目的】分析纤毛鹅观草种质资源的表型多样性,筛选作为饲草利用的优良种质,为纤毛鹅观草种质挖掘和新品种培育提供优异资源和理论参考。【方法】以来自河南地区不同生态区域的15份野生纤毛鹅观草种质为材料,对其16个表型性状进行变异... 详细信息

【目的】分析纤毛鹅观草种质资源的表型多样性,筛选作为饲草利用的优良种质,为纤毛鹅观草种质挖掘和新品种培育提供优异资源和理论参考。【方法】以来自河南地区不同生态区域的15份野生纤毛鹅观草种质为材料,对其16个表型性状进行变异分析、相关分析、聚类分析和主成分分析,并以各主成分特征值贡献率为权重建立综合得分(D)评价数学模型,对纤毛鹅观草种质进行综合评价排序。【结果】16个表型性状在不同纤毛鹅观草种质间存在极显著差异(P<0.01,下同),旗叶宽度的变异系数最大(21.88%),其次为种子产量(17.88%)和旗叶长度(17.81%),种子宽度的变异最小,仅为5.67%;7个营养相关性状的平均变异系数为15.48%,其余9个繁殖相关性状的平均变异系数为10.82%。种子产量与小穗宽度、芒长度和千粒重显著相关(P<0.05,下同),而干草产量与旗叶宽度、叶鞘长度、花序长度、小穗数、小穗宽度和种子长度显著正相关,与小穗长度和芒长度极显著正相关。15份纤毛鹅观草种质资源在欧式距离10处可分为4个类群,第Ⅰ类群包括5份种质,主要性状特征是植株较高,穗秆和花序较长,旗叶长宽中等;第Ⅱ类群包括2份种质,主要特征是植株较矮,繁殖性状较为突出;第Ⅲ类群包括3份种质,主要特征是旗叶较大,第一节间较长,干草产量较高,但其种子较小,种子产量低;第Ⅳ类群包括5份种质,主要特征是植株矮小。旗叶宽度、叶鞘长度、芒长度、小穗数和小穗长度是引起纤毛鹅观草不同居群表型性状差异的主要因子。【结论】河南南阳的4个种质资源(编号为RC13、RC10、RC15、RC12)综合性状表现较好,这些种质株高更高,旗叶更宽,饲草产量和种子产量相对更高,可用作纤毛鹅观草育种亲本材料或直接生产利用。

关键词：纤毛鹅观草表型性状变异综合评价

The Mechanism of Heating Rate on the Secondary Recrystallization Evolution in Grain Oriented Silicon Steel

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 275-282页

作者：高倩 LI jun WANG Xianhui CAO Laifu GONG Jian LI bo Central Iron and Steel Research Institute Group Shougang Zhixin Electromagnetic Material R&D (Beijing) Co. Ltd. Beijing Shougang Co. Ltd.

Grain-oriented silicon steels were prepared at different heating rates during high temperature annealing, in which the evolution of magnetic properties, grain orientations and precipitates were studied. To illustrate the Zener factor, the diameter and number density of precipitates of interrupted testing samples were statistically calculated. The effect of precipitate ripening on the Goss texture and magnetic property was investigated. Data indicated that the trend of Zener factor was similar under different heating rates, first increasing and then decreasing, and that the precipitate maturing was greatly inhibited as the heating rate increased. Secondary recrystallization was developed at the temperature of 1 010 ℃ when a heating rate of 5 ℃/h was used, resulting in Goss, Brass and {110} oriented grains growing abnormally and a magnetic induction intensity of 1.90T. Furthermore, increasing the heating rate to 20 ℃/h would inhibit the development of undesirable oriented grains and obtain a sharp Goss texture. However, when the heating rate was extremely fast, such as 40 ℃/h, poor secondary recrystallization was developed with many island grains, corresponding to a decrease in magnetic induction intensity to 1.87 T. At a suitable heating rate of 20 ℃/h, the sharpest Goss texture and the highest magnetic induction of 1.94 T with an onset secondary recrystallization temperature of 1 020 ℃ were found among the experimental variables in this study. The heating rate affected the initial temperature of secondary recrystallization by controlling the maturation of precipitates, leading to the deviation and dispersion of Goss texture, thereby reducing the magnetic properties.

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