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大型通航隧洞建设发展现状分析与拖曳通航演进趋势

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重庆交通大学学报（自然科学版） 2024年第9期43卷 34-42页

作者：王齐吴俊王伟黄龙江周世良贵州省港航集团有限公司贵州贵阳550081 重庆交通大学西南水利水运工程科学研究院重庆400016 重庆交通大学内河航道整治技术交通行业重点实验室重庆400074

通航隧洞作为打通山区航道关键卡口及实现通航建筑物间有效衔接的通航方式,成为了乌江等多条高等级航道枢纽提档扩能的首选方案。笔者调研了大型通航隧洞的行业需求与发展现状,分析了自航式通航隧洞面临的断面尺度要求高、施工开挖难度... 详细信息

通航隧洞作为打通山区航道关键卡口及实现通航建筑物间有效衔接的通航方式,成为了乌江等多条高等级航道枢纽提档扩能的首选方案。笔者调研了大型通航隧洞的行业需求与发展现状,分析了自航式通航隧洞面临的断面尺度要求高、施工开挖难度大、船舶通航安全不可控等技术瓶颈;针对自航式通航隧洞技术瓶颈,总结了顶部拖曳式、岸侧拖曳式等拖曳式通航隧洞方案,对比分析了各种方案在隧洞断面尺度、安全风险、通航效率、环境友好等方面的适用特点,针对拖曳式通航隧洞内船水复杂流固耦合作用分析,提出了亟待解决的4个层面的关键技术难题;展望了通航隧洞将船舶“自航方式”向“非自航拖曳方式”转变带来的4个“标准化”要求;最后,通过1:40的拖曳通航隧洞物理模型试验得出:在隧洞宽度30 m,不同水深条件下,船舶拖曳航行总阻力随弗劳德数增大而增大,相同拖曳速度下,船舶拖曳航行总阻力随水深的增加而减小。为通航隧洞在乌江航道扩能提供了些许思路。

关键词：航道工程通航隧洞发展现状拖曳通航四个“标准化” 趋势展望

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GENETIC DIVERSITY AND GEOGRAPHIC PATTERN OF WILD LOTUS (NELUMBO NUCIFERA) IN HEILONGJIANG PROVINCE

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Chinese Science Bulletin 2006年第4期51卷 421-432页

作者： XUE Jianhua ZHUO Lihuan zhou shiliang College of Landscaping Northeast Forestry University Harbin 150040China Laboratory of Systematic & Evolutionary Botany Institute of Botany Chinese Academy of Sciences Beijing 100093 China Department of Life Sciences Daqing Normal College Daqing 163712 China

Based on 47 accessions from Ussuri River Valley, Songhua River Valley and Heilong River Valley together with 2 accessions from Russia and 27 accessions of cultivated lotus from other provinces in China, genetic diversity of wild lotus (Nelumbo nucifera) were revealed using RAPD and ISSR markers. Twenty RAPD primers generated 113 loci, of which 71.68% were polymorphic across all sam-ples. The expected heterozygosity was 0.1583. The percentage of polymorphic loci and expected het-erozygosity in the wild lotus were 50.44% and 0.1241, respectively. The parameters of the cultivated lotus were slightly higher, 53.98% and 0.1651 corre-spondingly. Sixteen ISSR primers produced 90 loci. The percentages of polymorphic loci and expected heterozygosity were 41.11% and 0.0851 at species level, 28.89% and 0.0661 for the wild lotus, and 32.22% and 0.0963 for the cultivated lotus. AMOVA analysis of the wild lotus showed that a small number of variances exist among the 3 river valleys (21.68% for RAPD with Gst=0.1312 and 15.11% for ISSR with Gst=0.1352). The molecular variances of both the wild and the cultivated lotuses came predominantly from within the 3 river valleys and the cultivated samples (73.25% for RAPD and 81.11% for ISSR). Variance components from the wild and the cultivated lotus accounted for 19.17% for RAPD and 13.17% for ISSR, and variations among the valleys and the culta seemed the least important (7.585 for RAPD and 5.725 for ISSR). Neighbor-joining analysis demon-strated that considerable differentiation happened between the wild and the cultivated lotus. The wildlotus at middle reaches of the Songhua River Valley seemed to be the centre of remnants, from which it spread to the Ussuri River Valley and the Heilong River Valley. The very limited genetic diversity sug- gests that the wild lotus has experienced severe bot- tleneck effect, founder effect and rebirth effect. Con- sidering its long evolutionary history, scarcity of ge- netic variations and importance i

关键词：莲属植物遗传多样性地理图象再生效果黑龙江

Phylogeny and Classifcation of Prunus sensu lato (Rosaceae)

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Journal of Integrative Plant Biology 2013年第11期55卷 1069-1079页

作者： Shuo Shi Jinlu Li Jiahui Sun Jing Yu shiliang zhou State Key Laboratory of Systematic and Evolutionary Botany Institute of Botany the Chinese Academy of Sciences University of Chinese Academy of Sciences College of Landscape Architecture Northeast Forestry University

The classification of the economically important genus Prunus L. sensu lato （s.L） is controversial due to the high levels of convergent or the parallel evolution of morphological characters. In the present study, phylogenetic analyses of fifteen main segregates of Prunus s.I. represented by eighty-four species were conducted with maximum parsimony and Bayesian approaches using twelve chloroplast regions （atpB- rbcL, matK, ndhF, psbA-trnH, rbcL, rpL 16, rpoC1, rps16, trnS-G, trnL, trnL-F and ycfl） and three nuclear genes （ITS, s6pdh and Sbel） to explore their infrageneric used to develop a new, phylogeny-based classification relationships. The results of these analyses were of Prunus s.I. Our phylogenetic reconstructions resolved three main clades of Prunus s.I. with strong supports. We adopted a broad-sensed genus, Prunus, and recognised three subgenera corresponding to the three main clades： subgenus Padus, subgenus Cerasus and subgenus Prunus. Seven sections of subgenus Prunus were recognised. The dwarf cherries, which were previously assigned to subgenus Cerasus, were included in this subgenus Prunus. One new section name, Prunus L. subgenus Prunus section Persicae （T. T. yu ＆ L. T. Lu） S. L. zhou and one new species name, Prunus tianshanica （Pojarkov） S. Shi, were proposed.

关键词： Amygdaloideae phylogeny Prunoideae Prunus taxonomy.

Reliability Assessment of Nuclear Power Plant Digital Instrumentation and Control System I: Challenges and Research Status of Reliability Assessment Methodology

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Reliability Assessment of Nuclear Power Plant Digital Instru...

A Fast Weight Optimization Method in H∞ Loop-shaping Design for Single Input Single Output System

第26届中国控制与决策会议

作者： zhou shiliang Jiang Ruitao Liu Yuyan School of Nuclear Science and Engineering North China Electric Power University School of Control and Computer Engineering North China Electric Power University

ISBN: (纸本)9781479937097

Considering characteristics of nuclear power plant digital instrumentation and control system, challenges of reliability assessment of digital instrumentation and control system are pointed out. As for its dynamic behavior and multi-states failure mode, limitation of traditional methods, research status and applicability of dynamic flowgraph methodology and other advance dynamic reliability assessment approach were introduced and compered. It’s concluded that Dynamic flowgraph methodology maybe the dominant one in future after simplify its model procedure and reduction computational cost of its deductive analysis.

关键词： Nuclear power plant Digital instrumentation and control system Dynamic reliability Research status

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A Fast Weight Optimization Method in H∞ Loop-shaping Design...

The Structure and Parameters Optimization of ADRC for Steam Generator Water Level

第26届中国控制与决策会议

作者： Liu Yuyan zhou shiliang School of Control and Computer Engineering North China Electric Power University School of Nuclear Science and Engineering North China Electric Power University

ISBN: (纸本)9781479937066

A weight optimization method for single input single output system Loop-shaping Design is addressed. Using the proposed method, suboptimal weight which meets constraints of desired loop-shaping and grade of amplitudefrequency curve of weight can be obtained. Acceptable range of amplitude-frequency curve of weight is also given, in which maximum robust stable margin is kept. Designer can choose low order whose amplitude-frequency curve is within this range no matter how much fitting error between the selected weight and optimal amplitude-frequency is. Simulation results show that the proposed method can maximize the robust stable margin while ensuring loop shape of open loop plant lives in a pre-defined region and grade of weight less than the value given by designer. Stable lightly damped pole-zero cancellation is prevented, which is attributed to grade constraint of amplitude-frequency curve of the synthesized weight. And corresponding program is at least 100 times faster than similar optimization algorithm which completely is based on linear matrix inequality technology.

关键词： H∞ Loop Shaping Weight Optimization Robust Control Lightly Damped System

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The Structure and Parameters Optimization of ADRC for Steam ...

AI enhances drug discovery and development

第26届中国控制与决策会议

作者： Liu Yuyan zhou shiliang Song Bing School of Control and Computer Engineering North China Electric Power University School of Nuclear Science and Engineering North China Electric Power University Fujian Ningde Nuclear Power Company Limited

ISBN: (纸本)9781479937066

It is worse that steam generator is controlled by PID which is non-minimum system with oscillation. ADRC achieves excellent control performance using nonlinear control law, but it isn’t necessarily optimal when adopting standard ADRC structure and NLSEF. In this paper, we optimize the standard ADRC, the simplified ADRC without TD, the improved ADRC with NLSEF using mtfal and zzxfal based on GA. The simulation and performance analysis indicate that we should choose ADRC without TD, with NLSEF using mtfal for SG water level control.

关键词： Steam Generator Active Disturbances Rejection Control Genetic Algorithm

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National Science Review 2024年第3期11卷 52-54页

作者： Fang Bai shiliang Li Honglin Li Shanghai Institute for Advanced Immunochemical Studies and School of Life Science and Technology ShanghaiTech University Lingang Laboratory Innovation Center for AI and Drug Discovery East China Normal University

The advent of the third wave of artificial intelligence(AI) heralds a new era in drug discovery. AI-powered techniques can be characteristic of identifying features that are difficult for humans to interpret from big ...

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给定结构低阶控制器的H_∞回路成形设计及在蒸汽发生器水位控制中的应用

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中国电机工程学报 2012年第29期32卷 123-130,I0018页

作者：周世梁刘玉燕华北电力大学北京市昌平区102206

针对标准H回路成形设计权函数选取困难、所得控制器阶次高的缺点,提出了一种给定结构低阶鲁棒控制器设计方法。该方法综合了低阶权函数优化和静态H控制器,只需设计者给出成形后被控对象奇异值上下界约束的控制点坐标,以及期望的控制器... 详细信息

针对标准H回路成形设计权函数选取困难、所得控制器阶次高的缺点,提出了一种给定结构低阶鲁棒控制器设计方法。该方法综合了低阶权函数优化和静态H控制器,只需设计者给出成形后被控对象奇异值上下界约束的控制点坐标,以及期望的控制器阶次和结构,便可通过基于线性矩阵不等式技术的迭代优化,得到满足预定控制性能要求且使得鲁棒稳定裕量最大化的控制器。运用所提方法设计了蒸汽发生器水位对象的二阶鲁棒控制器。在水位设定值阶跃变化、蒸汽流量阶跃扰动和运行工况点变化的情况下,进行了对比仿真试验。结果表明,所设计的控制系统取得了良好的控制性能,且鲁棒稳定性优于自抗扰控制(active disturbancerejection control,ADRC)策略或双PI控制策略设计的控制系统。

关键词：蒸汽发生器水位控制鲁棒控制静态H∞回路成形权函数优化线性矩阵不等式

Numerical investigation of sinusoidal pulsating gas intake to intensify the gas-slag momentum transfer in the top-blown smelting furnace

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 301-314页

作者： Zhanghao Wan shiliang Yang Desong Kong Dongbo Li Jianhang Hu Hua Wang State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China Southwest Copper Branch Yunnan Copper Co.Ltd.Kunming 650102China

The variation characteristics of bubble morphology and the thermal-physical properties of bubble boundary in the top-blown smelting furnace were explored by means of the computational fluid dynamics *** essential aspects of the fluid phase(e.g.,splashing volume,dead zone of copper slag,and gas penetration depth)were explored together with the effect of sinusoidal pulsating gas intake on the momentum-transfer performance between *** results illustrated that two relatively larger vortices and two smaller vortices appear in the bubble waist and below the lance,*** expansion of larger ones as well as the shrinking of smaller ones combine to cause the contraction of the bubble *** to the results of the case with a fixed gas injection velocity(V_(g)=58 m/s),the splashing volume and dead zone volume of the slag under the V_(g)=58+10sin(2πt)condition are reduced by 24.9%and 23.5%,respectively,where t represents the instant *** penetration depth and slag motion velocity of the latter are 1.03 and 1.31 times high-er than those of the former,respectively.

关键词： top-blown smelting furnace pulsed flow volume of fluid penetration depth splashing volume