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水电2006国际研讨会

作者： Lu Jinyou Dong Yaohua Huang Yue changjiang river scientific research institute (CRSRI) wuhan 430010 P.R.china.

After storage of the Three Gorges Reservoir at Normal Water Level （NWL） of 135m-elevation, variations have been occurred to different extents in the Reservoir area and downstream river channels and lakes. （1） Analysis of field data have shown that, although incoming annual runoffs of the Reservoir during 2003 to 2005 are close to average annual runoff, incoming annual sediment runoffs have been reduced 43%-63%. （2） Based on comparison between inflow and outflow suspended sediment runoffs at hydrographic stations of the Reservoir, sediment deposition in the Reservoir has been accumulated up to 3.77 108t from Jun. 2003 to Dec. 2005, while sediment flushing rate out of the Reservoir is about 40%. （3） Though annual runoffs at hydrographic stations along downstream changjiang main channels are similar to average annul runoffs during 2003 to 2005, sediment runoffs have been reduced 50%-87% with characteristics of tapering-change along downstream channels. However, diverting rates of flow and sediment into three Jingjiang diversion channels generally remain unchanged. （4） Obvious scouring, which mainly happens in basic channels, has been occurred in downstream changjiang main channels. From Oct. 2002 to Oct. 2005, river channels of YiC-ChengLJ reach have been scoured to 3.83 108m3 under bank-full stage （0.81, 1.24 and 1.78 108m3 for YiC-ZhiC reach, Upper Jingjiang and Lower Jingjiang respectively）, while ChengLJ-JiuJ reach has been scoured 1.12 108m3 at the same period. Bank failures are frequently accompanied with scouring of Jingjiang river. （5） As step-by-step rising of NWL and continuous operation of the Three Gorges Reservoir, reservoir sedimentation and downstream scouring will be existing for a very long term. That will inevitably bring about series of flood-control and navigation issues. Therefore, further researches should be carried out in next stage, such as strengthening of observation and analysis on field data, deepening of mathematical and physical models st

关键词： Three Gorges Reservoir Reservoir Sedimentation Downstream Scouring Characteristics of Runoff and Sediment

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ON THE LOCALIZATION AND CONVERGENCE OF MULTIPLE FOURIER INTEGRAL BY BOCHNER-RIESZ MEANS

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Analysis in Theory and Applications 1993年第2期9卷 37-49页

作者： Yu Maohe Kunming Hydropower scientific research institute, china Kunming Hydropower scientific research institute Kunming P. R. China

In this paper we consider lim _(R-) B_R^(f,x_0), in one case that f_x_0 (t) is a ABMV function on [0, ∞], and in another case that f∈L_(m-1)~1(R~) and x^k/~kf∈BV(R) when |k| = m-1 and f(x) = 0 when |x -x_0|0. Our t... 详细信息

关键词： lim ON THE LOCALIZATION AND CONVERGENCE OF MULTIPLE FOURIER INTEGRAL BY BOCHNER-RIESZ MEANS

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Design & Construction Progress and Prospect of TGP

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人民长江 2002年第Z1期33卷 2-6页

作者： ZHENG Shou-renChief Engineer, changjiang Water Resources Commission, wuhan 430010, china Chief Engineer Changjiang Water Resources Commission Wuhan 430010 China

The construction of the TGP has proceeded smoothly since its commencement of construction in 1994 and the construction quality is good in general. The construction proceeds in accordance with the master project schedule in preliminary design approved by the central government and the investment can be controlled within the total budget of the preliminary design. The changjiang Water Resources Commission, taking charge of the general design jobs of the TGP, has consistently paid attention to the project quality in the first place and carried out large amount of investigation, design and scientific research work. This paper makes an overall summarization and presentation on important technical issues in the design, such as dam, powerhouse structure, permanent ship locks, ship lift, project safety monitoring, main river closure and the 2nd stage cofferdam, mechanical and electric design etc., and put forwards a lot of suggestions about optimizing design schemes and measures for smoothing away construction difficulties in accordance with construction progress.

关键词： hydraulic structure electromechanical equipment technical design construction progress safety monitoring Three Gorges Multipurpose Project

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“有效降低全社会物流成本”研讨会专家观点综述

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中国流通经济 2024年第5期38卷 3-17页

作者：本刊编辑部《中国流通经济》编辑部

2024年2月24日,习近平总书记主持召开中央财经委员会第四次会议,指出物流是实体经济的“筋络”,强调必须有效降低全社会物流成本,增强产业核心竞争力,提高经济运行效率。基于此,2024年4月24日,北京物资学院党委宣传部、杂志社、科研处... 详细信息

2024年2月24日,习近平总书记主持召开中央财经委员会第四次会议,指出物流是实体经济的“筋络”,强调必须有效降低全社会物流成本,增强产业核心竞争力,提高经济运行效率。基于此,2024年4月24日,北京物资学院党委宣传部、杂志社、科研处联合主办了“有效降低全社会物流成本”研讨会。本次研讨会邀请我国流通物流领域的专家学者,围绕物流服务实体经济和人民群众、物流成本构成、交通运输体系改革、统一高效物流市场构建和现代商贸流通体系完善等问题,发表观点,为探索有效降低全社会物流成本可行路径,构建现代流通体系提供理论支持和实践指导。本刊编辑部对专家阐述的主要观点进行了归纳整理,以飨读者。

关键词：全社会社会物流成本新质生产力流通体系降本增效

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Analysis on Cause of Fast Setting of Cement after Mixing Superplasticizers

Analysis on Cause of Fast Setting of Cement after Mixing Sup...

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The Fifth International Symposium on Roller Compacted Concrete(RCC) Dams

作者： Li Jiazheng~(1 2 3) Xiao Kaitao~(1 3) 1.Yangtze river scientific research institute of changjiang Water Resources Commission wuhan 430010 china 2.Water Conservancy and Hydropower institute of wuhan University wuhan 430072 china 3.research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources wuhan 430010.china

＜正＞Aiming at the fast setting phenomenon of middle-heat cement after mixing retarding superplasticizers in the Guizhou Goupitan Hydropower Station project construction,the influence factors,such as the mineral composition of cement,the type and content of gypsum,the type and content of admixtures and mixing method of admixtures,on the compatibility between cement and admixtures and the reason resulting in the fast setting of cement after mixing superplasticizers were *** prevention measures of fast setting of cement were proposed.

关键词： Goupitan Hydropower Station middle-heat cement superplasticizers fast setting

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PERFORMANCE OF ACRYLIC SUPERPLASTICIZER DYNAMON SR3 ＆ ITS APPLICATION ON THREE-GORGE DAM CONSTRUCTION

PERFORMANCE OF ACRYLIC SUPERPLASTICIZER DYNAMON SR3 ＆ ITS A...

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International Conference of Hydropower PROCEEDINGS

作者： ZHOU Shouxian Yangtze river scientific research institute 23Huangpu Road wuhan 430010 chinaWANG Haoyuan Fudebo (Shanghai) Ltd.HU Mengqi Yangtze river scientific research institute 23 Huangpu Road wuhan 430010 china

＜正＞ Dynamon SR series of products is of a new type of high-performance, high-range water-reducing admixture. Among other competitive characteristics, Dynamon SR is stable in quality and high in water reduction. Producing with Dynamon SR, the concrete is characterized with slow slump loss, strong strength development, moderated hydration-heat release, and significant binder-enhancement. Having demonstrated its power and advantages in concretes for the Three-Gorge Dam construction, Dynamon SR is in general an admixture with vast application capabilities.

关键词： SR3 superplasticizer acrylic acid Three-Gorges concrete

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CHARACTERISTICS OF FLUVIAL PROCESSES AND STABILITY OF THE BRAIDED river SECTIONS WITHIN THE MIDDLE AND LOWER REACHES OF THE YANGTZE river

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International Journal of Sediment research 1988年 52-75页

作者： Luo Haichao 1. Senior Engineer, Yangtze river scientific research institute, wuhan , china.

The middle and lower reaches of the Yangtze river are defined as typical models of braided channel patterns with a predominant character of gradual alternation between the main and branch channel. Herewith described comprehensively are the geomorphological feature of braiding and the characteristics of runoff and sediment load while great attention is paid on the study of the evolution cycle of mutual alternation of the main and the branch and the conditions which control the braided river to maintain a relative stability for a reasonably long period. It is found that: 1. The maintenance of relative stability is due to the favourable conditions of flow and sediment diversion to the branch; 2. Mutual alternation occurs due to the changes-of-flow feature which cause the transverse gradient at the point of diversion to be changed and consequently the redistribution of flow and sediment into the branch. In the last part of this paper comparison is made with some known braided rivers, both in china and abroad and analysis is carried on for all effective factors, concluding is that Yangtze river should be classified as a very favourable forked river with highly developed islands and with high stability.

关键词： Braided channel pattern geomorphological feature allu- vial plain forking arm sediment-bifurcating ratio dynamic axis.

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research ON THE ALKALI-ACTIVITY OF THE NATURAL AGGREGATES FROM YI CHANG CHANNEL SEGMENT OF YANGTZE river

RESEARCH ON THE ALKALI-ACTIVITY OF THE NATURAL AGGREGATES FR...

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第十二届国际混凝土碱集料反应会议

作者： Yang Hua-quan Li Peng-xiang Dong Yun (Yangtze river scientific research institute wuhan430010 china)

＜正＞ The Yangtze river is the largest river in china. The sandstone of some channel segments are excellent natural concrete aggregates, which have rational particle size distribution a d a good physical and chemical property. The active aggregates from the storehouse of Yichang channel segment of Yangtze river are mainly flint, rhyolite, secondly tuff and volcanic breccia. By the methods of geologic, petrographical, physical and chemical method, motar bar length method and rapid method, the natural aggregates of Yichang channel segment are investigated, and it is confirmed they contains flint, rhyolite, tuff and other active aggregates. The conclusions from geologic, petrographical, physical and chemical method and rapid method are consistent. By mortar bar length method, the long-term age result of the natural aggregates shows that when the alkali content in cement reaches 0.78%, the expansion rate of mortar sample with 5-year age will beyond 0.1%, which is the harmful value limit. Because of the importance of the concrete engineering, and considering the safety and durability of engineering, it is very important to control the alkali content in cement or add some fly ash when using the natural aggregate of Yichang channel segment of Yangtze river.

关键词： Yangtze river Yichang channel segment alkali activity natural aggregate

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富营养化水体中流速对藻类生长的调控作用研究

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节水灌溉 2009年第9期 52-54页

作者：刘凤丽金峰长江水利委员会长江科学院湖北武汉430010

水体富营养化问题由于发展快、危害大、处理难及恢复慢等特点,受到全球高度重视。目前国内外在此方面进行了大量试验研究,介绍了国内外关于流速对藻类生长影响的研究成果,探讨水体流速大小和水华发生快慢之间的关系,并指出目前研究主要... 详细信息

水体富营养化问题由于发展快、危害大、处理难及恢复慢等特点,受到全球高度重视。目前国内外在此方面进行了大量试验研究,介绍了国内外关于流速对藻类生长影响的研究成果,探讨水体流速大小和水华发生快慢之间的关系,并指出目前研究主要集中在横向流速对藻类生长的影响方面,对水动力其他要素研究的较少,建议将纵向断面平均流速、紊动强度、水面波动特性和横向流速结合起来研究,以求更加全面准确的阐述水动力条件的改变对水质以及藻类生长速率的影响,为制定水华控制措施提供理论依据。

关键词：水质污染富营养化流速

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习近平新时代中国特色社会主义思想对马克思主义的创新发展

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马克思主义与现实 2024年第4期 1-13,F0003页

作者：中央党史和文献研究院第四研究部课题组中央党史和文献研究院第四研究部课题组

党的十八大以来,中国特色社会主义进入新时代,以习近平同志为主要代表的中国共产党人,坚持把马克思主义基本原理同中国具体实际相结合、同中华优秀传统文化相结合,创立了习近平新时代中国特色社会主义思想。习近平新时代中国特色社会主... 详细信息

党的十八大以来,中国特色社会主义进入新时代,以习近平同志为主要代表的中国共产党人,坚持把马克思主义基本原理同中国具体实际相结合、同中华优秀传统文化相结合,创立了习近平新时代中国特色社会主义思想。习近平新时代中国特色社会主义思想是当代中国马克思主义、21世纪马克思主义,是中华文化和中国精神的时代精华,实现了马克思主义中国化时代化新的飞跃,对马克思主义作出了重大原创性贡献。习近平新时代中国特色社会主义思想在世界观和方法论、人民性、人与自然、文明观等方面对马克思主义哲学作出了创新发展。习近平经济思想指导新时代中国经济发展实践,创造性地回答了一系列重大理论和实践问题。中国特色社会主义既坚持了科学社会主义基本原则,又根据时代条件赋予其鲜明的中国特色,已成为21世纪科学社会主义发展的旗帜和振兴世界社会主义的中流砥柱。要始终坚持“两个结合”推进马克思主义中国化时代化,坚持运用辩证唯物主义和历史唯物主义,正确回答时代和实践提出的重大问题,以中国式现代化全面推进强国建设、民族复兴伟业。

关键词：习近平新时代中国特色社会主义思想马克思主义创新发展

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