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建筑实践 2024年第5期 126-133页

作者： china IPPR International engineering Co., ltd. 中国中元国际工程有限公司

北京朝阳医院是—所拥有3个院区的大型综合医院,其中的常营院区是2023年建成并投入使用的全新院区。项目南北两侧为居住小区,东侧为城市体育公园,西侧为体育设施用地。基地处于开发成熟的城市街区,四面环路,地铁、公交车站等公共交通发...

北京朝阳医院是—所拥有3个院区的大型综合医院,其中的常营院区是2023年建成并投入使用的全新院区。项目南北两侧为居住小区,东侧为城市体育公园,西侧为体育设施用地。基地处于开发成熟的城市街区,四面环路,地铁、公交车站等公共交通发达。由于基地面积和容积率的限制,项目的建筑面积共20万m2,其中8.3万m2需被埋在地下。设计方案围绕改善地下建筑的自然采光和通风条件展开,通过在基地东西走向引入生态绿谷,实现了与东西体育公园的视线贯通。

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北京2022年冬奥会与冬残奥会延庆赛区,北京,中国

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世界建筑 2024年第4期 42-45页

作者： china Architecture Design&Research Group Beijing General municipal engineering Design&Research Institude Co.ltd.Ecosign Moutain Resort Planners ltd.Planungsbüro Deyle GmbH 中国建筑设计研究院有限公司北京市市政工程设计研究总院有限公司加拿大伊克森山地景区规划有限公司德国戴勒有限公司

北京2022年冬奥会与冬残奥会延庆赛区核心区规划和场馆及配套设施设计始于2017年1月,于2021年竣工投入使用。项目位于燕山山脉军都山以南的小海坨南麓,风景秀丽、山高林密、地形复杂、用地狭促,是最具挑战性的北京冬奥赛区。延庆赛区的... 详细信息

北京2022年冬奥会与冬残奥会延庆赛区核心区规划和场馆及配套设施设计始于2017年1月,于2021年竣工投入使用。项目位于燕山山脉军都山以南的小海坨南麓,风景秀丽、山高林密、地形复杂、用地狭促,是最具挑战性的北京冬奥赛区。延庆赛区的设计理念是“山林场馆,生态冬奥”,通过建筑、景观和赛道设计的联合创新,打造冬奥场馆历史上新的里程碑,同时最大限度减少对环境的扰动,使建筑与自然景观有机结合,在满足精彩赛事要求的基础上,建设一个融于自然山林中的冬奥赛区。

关键词：军都山残奥会联合创新延庆融于自然冬奥场馆最大限度

Selections of data preprocessing methods and similarity metrics for gene cluster analysis

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Progress in Natural Science:Materials International 2006年第6期16卷 607-613页

作者： YANG Chunmei, WAN Baikun and GAO Xiaofeng (Department of Biomedical engineering and Scientific Instrumentations, Tianjin University, Tianjin 300072, china Motorola (china) Electronics ltd., Tianjin 300457, china) [a]Department of Biomedical engineering and Scientific Instrumentations Tianjin University Tianjin China [b]Motorola (china) Electronics ltd. Tianjin China

Clustering is one of the major exploratory techniques for gene expression data analysis. Only with suitable similarity metrics and when datasets are properly preprocessed, can results of high quality be obtained in cluster analysis. In this study, gene expression datasets with external evaluation criteria were preprocessed as normalization by line, normalization by column or logarithm transformation by base-2, and were subsequently clustered by hierarchical clustering, k-means clustering and self-organizing maps (SOMs) with Pearson correlation coefficient or Euclidean distance as similarity metric. Finally, the quality of clusters was evaluated by adjusted Rand index. The results illustrate that k -means clustering and SOMs have distinct advantages over hierarchical clustering in gene clustering, and SOMs are a bit better than k-means when randomly initialized. It also shows that hierarchical clustering prefers Pearson correlation coefficient as similarity metric and dataset normalized by line. Meanwhile, k -means clustering and SOMs can produce better clusters with Euclidean distance and logarithm transformed datasets. These results will afford valuable reference to the implementation of gene expression cluster analysis.

关键词： gene expression cluster analysis data preprocessing similarity metrics Rand index.

High-voltage transmission tower-line system subjected to disaster loads

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Progress in Natural Science:Materials International 2006年第9期16卷 899-911页

作者： LI Hongnan and BAI Haifeng ( State Key Laboratory of Coastal and Offshore engineering, School of Civil and Hydraulic engineering, Dalian University of Technology, Dalian 116024, china china Railway No. 9 Group Co., ltd., Shenyang 110013, china) [a]State Key Laboratory of Coastal and Offshore engineering School of Civil and Hydraulic Engineering Dalian University of Technology Dalian China [b]china Railway No.9 Group Co. Ltd. Shenyang China

The high-voltage power transmission system is an important lifeline structure. It is significant for wide researches on the features and ability of the system subjected to earthquake and environmental loads. The promising prosperity of the system has been demonstrated around the world. The corresponding advances of the system with respect to the mechanism of loading action, analytical methods, experimental research measurements, structural vibration control, fatigue damage, lifetime prediction, and design methods are comprehensively discussed herein. Finally, further research work on dynamic response characteristics of high-voltage transmission tower-line system in the near future is predicted.

关键词： high-voltage power transmission tower-line system loading effects dynamic analysis experimental researches design theories.

Soil erosion and sediment transport in the gullied Loess Plateau:Scale effects and their mechanisms

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Science china(Technological Sciences) 2009年第5期52卷 1283-1292页

作者： LI TieJian1,WANG GuangQian1,XUE Hai2,3 & WANG Kai4 1 State Key Laboratory of Hydroscience and engineering,Tsinghua University,Beijing 100084,china 2 Yellow River engineering Consulting Co.,ltd.,Zhengzhou 450003,china 3 North china Institute of Water Conservancy and Hydropower,Zhengzhou 450008,china 4 china Institute of Water Resources and Hydropower Research,Beijing 100038,china 1. State Key Laboratory of Hydroscience and engineering Tsinghua University Beijing 100084 China 2. Yellow River engineering Consulting Co. Ltd. Zhengzhou 450003 China 3. North china Institute of Water Conservancy and Hydropower Zhengzhou 450008 China 4. china Institute of Water Resources and Hydropower Research Beijing 100038 China

Scale effects exist in the whole process of rainfall-3-runoff-3-soil erosion-3-sediment transport in river basins. The differences of hydrographs and sediment graphs in different positions in a river basin are treated as basic scale effects, which are more complex in the gullied Loess Plateau, a region notorious for high intensity soil erosion and hyper-concentrated sediment-laden flow. The up-scaling method of direct extrapolation that maintains dynamical mechanism effective in large scale application was chosen as the methodology of this paper. Firstly, scale effects of hydrographs and sediment graphs were analyzed by using field data, and key sub-processes and their mechanisms contributing to scale effects were clearly defined. Then, the Digital Yellow River Model that integrates sub-models for the subprocesses was used with high resolution to simulate rainfall-3-runoff-3-soil erosion-3-sediment transport response in Chabagou watershed, and the distributed results representing scale effects were obtained. Finally, analysis on the simulation results was carried out. It was shown that gravitational erosion and hyper-concentrated flow contribute most to the spatial variation of hydrographs and sediment graphs in the spatial scale. Different spatial scale distributions and superposition of different sub-processes are the mechanisms of scale effects.

关键词： scale effect soil erosion hyper-concentrated sediment-laden flow the Loess Plateau

Hydroturbine operating region partitioning based on analyses of unsteady flow field and dynamic response

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Science china(Technological Sciences) 2010年第2期53卷 519-528页

作者： WANG ZhengWei1, QIN Liang2, ZENG JiDi3, LIN JiaYang3, YANG JinYi4, CHEN WeiJiang4, LUO YongYao1 & YAN ZongGuo1 1 State Key Laboratory of Hydroscience and engineering and Department of Thermal engineering, Tsinghua University, Beijing 100084, china 2 Tianjin Dredging Company ltd., Tianjin 300042, china 3 Fujian Shuikou Hydropower Station, Fuzhou 350800, china 4 Wanjiazhai Hydropower Station, Pian’guan 036412, china 1. State Key Laboratory of Hydroscience and engineering and Department of Thermal engineering Tsinghua University Beijing 100084 China2. Tianjin Dredging Company Ltd. Tianjin 300042 China3. Fujian Shuikou Hydropower Station Fuzhou 350800 China4. Wanjiazhai Hydropower Station Pian’guan 036412 China

The operating states of hydroelectric generating units vary widely as the operating condition change. The details of the operating characteristics and the operating region partitioning method are discussed for two types of large Francis turbines in the Wanjiazhai Hydropower Plant and two same type large Kaplan turbines in the Shuikou Hydropower Plant. For the Wanjiazhai Hydropower units, the most critical factor affecting the operating stability is the hydraulic pressure fluctuations caused by the vortex rope in the draft tube. For Shuikou Hydropower units, the dynamic stresses as in the piston rod and the blade and the hydraulic thrust on the runner induced by the pressure fluctuations in the flow passage should be used to partition the operating regions. Analyzing the distribution cloud of operating characteristic factors which affects the operating stability in the hill-chart for each individual unit, the forbidden, stable and transient operating regions can be obtained.

关键词： hydroturbine operating regions hydraulic pressure fluctuations dynamic stresses

REGULATION OF FLOW AND SEDIMENT LOAD IN THE YELLOW RIVER

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International Journal of Sediment Research 2007年第2期22卷 103-113页

作者： Wenxue LI1, Jixiang LIU1 and Zhanwei WAN2Yellow River engineering Consulting Co. ltd., Zhengzhou 450003, china,Yellow River engineering Consulting Co. ltd., Zhengzhou 450003, china Yellow River Engn Consulting Co ltd Zhengzhou 450003 Peoples R China

Small runoff, large sediment load, and incompatible relationship of flow and sediment load are very important characteristics of the Yellow River. They are also the crux of the most prominent problems of the Yellow River. To solve these problems, the regimes of flow and sediment load have to be improved by increasing water, reducing sediment load, and by using reservoirs to regulate flow and sediment load. The results of experiments for regulating the flow and sediment load in the last three years by the Xiaolangdi Reservoir have indicated that this measure is a realistic and effective way to mitigate the prominent problems in flood control of the Lower Yellow River at present and in the near future. However, the regulation system is still imperfect. It is advisable to speed up the pace of research and construction of the system for regulating flow and sediment load.

关键词： The Yellow River Regulation of flow and sediment load The Xiaolangdi Reservoir Experiment Channel deterioration

Experimental study on upward bubble velocity and pierce length distributions in a water model of copper converter

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Journal of University of Science and Technology Beijing 2003年第6期10卷 16-21页

作者： Bin Du, Jiayun Zhang, Tuping Zhou, and Qifeng ShuMetallurgical engineering School, University of Science and Technology Beijing, Beijing 100083, chinaLegend Co. ltd., Beijing 100085, china Metallurgical engineering School University of Science and Technology Beijing Beijing 100083 China

The upward bubble velocity and the pierce length distributions in a sectionalwater model of the copper converter in Guixi Smelter in Jiangxi, china, were measured using atwo-contact electro-resistivity probe. In the case of using a single tuyere, the bubble velocitydistribution along longitudinal direction was similar to that derived from Guassian function. Beyondthe center of the longitudinal range, the bubble pierce length exhibited a sudden increase. Theupward bubble velocity at a specified location could go up to meters per second. Its probability ata fixed location obeys a lognormal function; the bubble pierce length there varies bellow a fewcentimeters. In the case of using multi-tuyeres, the upward bubble velocity was roughly uniformright above the tuyeres and showed a slow decrease beyond this region. The bubble pierce lengthwithin both of these two regions was roughly uniform. Its average value in the former region,however, was found to he somewhat lower than that in the later.

关键词： upward bubble velocity bubble pierce length distribution copper converter

Orientation-Singularity Representation and Orientation-Capability Computation of a Special Class of the Gough-Stewart Parallel Mechanisms Using Unit Quaternion

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Chinese Journal of Mechanical engineering 2012年第6期25卷 1096-1104页

作者： LI Baokun1, 2, CAO Yi1, 3, *, ZHANG Qiuju1, and HUANG Zhen4 1 School of Mechanical engineering, Jiangnan University, Wuxi 214122, china 2 School of Mechanical engineering, Anhui University of Science and Technology, huainan 232001, china 3 State Key Laboratory of Fluid Power Transmission and Control, Hangzhou 310027, china 4 Robotics Research Center, Yanshan University, Qinhuangdao 066004, china 1. School of Mechanical engineering Jiangnan University Wuxi 214122 China 2. School of Mechanical engineering Anhui University of Science and Technology Huainan 232001 China 3. State Key Laboratory of Fluid Power Transmission and Control Hangzhou 310027 China 4. Robotics Research Center Yanshan University Qinhuangdao 066004 China

Singular configuration seriously affects the performance of the Gough-Stewart parallel mechanism and has attracted many researchers’ attentions. However, most of existing topics often focus on the position-singularity of the mechanism for a constant-orientation, but few reports research the orientation-singularity for a given position. In order to investigate the orientation-singularity of the Gough-Stewart parallel mechanisms with two dissimilar semi-regular hexagonal platforms for a given position, after constructing the discrimination matrix of the singular configuration of the mechanism and computing the determinant of this matrix by using unit quaternion as the orientation parameters which can avoid the singularities in parameterization, a general symbolic expression representing the three-dimensional orientation-singularity locus for a given position is obtained and the three-dimensional view of the orientation-singularity locus is further described. The orientation-singularity-free void exists inside the orientation-singularity locus, but the shape of the orientation-singularity-free void is irregular and inconvenient for the design of the mechanism. The minimal inscribed sphere of the three-dimensional orientation-singularity locus namely the orientation-singularity-free ball is described. The radius of the ball orientation-capability is used as the measurement for the orientation-singularity-free void size. A new efficient algorithm is proposed for the computation of the orientation-capability. Finally, the influences of the geometry parameters and the different positions of the mechanism on the orientation-capability are discussed. A new method of the singularity analysis of the Gough-Stewart parallel mechanism is advanced based on the unit quaternion, and the research finds have important referential value for the configuration parameters optimization of this class of the parallel mechanisms with the goal of having the maximal singularity-free zone.

关键词： parallel mechanism unit quaternion orientation-singularity orientation-singularity-free void orientation-capability