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城轨车辆ATO模式节能策略研究

交通节能与环保 2024年第2期20卷 104-107页

作者：才溢朱博李木子刘振华北京市地铁运营有限公司运营四分公司北京100102 北京市地铁运营有限公司供电分公司北京100088

通过计算牵引能耗、制动能耗、辅助能耗对城轨车辆电耗的影响程度可知,牵引能耗、制动能耗占研究样本中单车能耗的99.2%。因此降低城轨车辆能耗应从降低牵引和制动能耗入手,辅助以控制辅助能耗的节能策略。城轨车辆牵引、制动能耗主要... 详细信息

通过计算牵引能耗、制动能耗、辅助能耗对城轨车辆电耗的影响程度可知,牵引能耗、制动能耗占研究样本中单车能耗的99.2%。因此降低城轨车辆能耗应从降低牵引和制动能耗入手,辅助以控制辅助能耗的节能策略。城轨车辆牵引、制动能耗主要发生在列车出站加速及进站减速过程中,以北京轨道交通昌平线为例,与市中心线相比,郊区线路站间距长,更适宜结合运行图排布及长大区间对列车ATO自动控制系统进行节能优化,达到节能减排的目的。

关键词：轨道交通能耗 ATO模式节能

脉冲发电机与直线感应电机直连供电系统建模与仿真

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载人航天 2020年第6期26卷 696-701页

作者：孙昌平谢贤飞于克训易正康张恒浩华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室中国运载火箭技术研究院研究发展部

针对直线感应电机电磁发射系统短时大功率电能需求的问题,提出了脉冲发电机直连式供电的电源方案,简要阐述了直连方案的电路连接方式和供电过程。从电机原理出发推导了单台脉冲发电机供电和多台脉冲发电机并联供电的全系统准稳态模型,... 详细信息

针对直线感应电机电磁发射系统短时大功率电能需求的问题,提出了脉冲发电机直连式供电的电源方案,简要阐述了直连方案的电路连接方式和供电过程。从电机原理出发推导了单台脉冲发电机供电和多台脉冲发电机并联供电的全系统准稳态模型,仿真分析了准稳态模型与常规瞬态模型的结果差异,并采用准稳态仿真模型研究了脉冲发电机电阻电感参数以及并联台数对电磁发射性能的影响。结果表明:脉冲发电机电阻和电感参数的增大均会导致发射时间的延长,使得发射系统性能下降;保证发射时长不变,采用多台脉冲发电机并联供电时,并联台数越多,对各台发电机性能的要求将越小,发电机电阻电感参数可设计得更大。

关键词：电磁发射准稳态模型脉冲发电机直线感应电机仿真分析

Influence of structural damage on evaluation of microscopic pore structure in marine continental transitional shale of the Southern North China Basin:A method based on the low-temperature N2 adsorption experiment

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Petroleum Science 2022年第1期19卷 100-115页

作者： Mei-Ling Han Xiao-Liang Wei Jin-Chuan Zhang Yang Liu Xuan Tang Pei Li Zi-yi Liu Key Laboratory of Strategy Evaluation for Shale Gas of Ministry of Land and Resources China University of GeosciencesBeijing100083China Exploration and Development Institute of Shengli Oilfield Company SinopecDongyingShandong 257015China Petroleum Exploration and Production Research Institute China Petroleum and Chemical Corporation(Sinopec)No.197 Baisha RoadChangping DistrictBeijing102206China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102200China

Structural damage from sample preparation processes such as cutting and polishing may change the pore structure of ***,changes in pore structure caused by this structural damage from crushing and its effect on marine continental transitional shale have not been well *** changes of microscopic pore structure in marine continental transitional shale during the sample preparation have important research value for subsequent exploration and development of shale *** this study,the pore structures of transitional shale samples from the Shanxi-Taiyuan Formation of the Southern North China Basin under different degrees of damage were analyzed through low-temperature N;adsorption experiments,combined with X-ray diffraction,total organic carbon,vitrinite reflectance analysis,and scanning electron *** results showed that(1)With increasing structural damage,the specific surface area(SSA)changed within relatively tight bounds,while the pore volume(PV)varied significantly,and the growth rate(maximum)exhibited a certain critical value with the crushing mesh number increasing from 20 to 200.(2)The ratio of SSA to PV can be used as a potential proxy for evaluating the influence of changes in the pore structure.(3)Correlation analysis revealed that the microscopic pore structure of marine continental transitional shale from the Shanxi-Taiyuan Formations is mainly controlled by organic matter and clay *** minerals play a leading role in the development of microscopic pores and changes in pore structure.

关键词： Marine continental transitional shale N_(2)adsorption Structural damage Crushing mesh Pore structure parameters

Primary logistics planning of oil products under the imbalance of supply and demand

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Petroleum Science 2022年第4期19卷 1915-1925页

作者： Rui Qiu Yong-Tu Liang Qi Liao ying-Qi Jiao Bo-Hong Wang yi Guo Hao-Ran Zhang National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology China University of Petroleum-BeijingFuxue Road No.18Changping DistrictBeijing102249PR China School of Petrochemical Engineering and Environment Zhejiang Ocean UniversityZhoushan316022China Sustainable Process Integration Laboratory–SPIL NETME CentreFaculty of Mechanical EngineeringBrno University of Technology–VUT BrnoTechnická2896/261669BrnoCzech Republic Oil&Gas Pipeline Control Center PipeChinaDongtucheng Road No.5Chaoyang DistrictBeijing100013PR China Center for Spatial Information Science The University of Tokyo5-1-5 KashiwanohaKashiwa-shiChiba277-8568Japan

This paper intends to complete the primary logistics planning of oil products under the imbalance of supply and demand. An integrated mathematical programming model is developed to simultaneously find the balance between supply and demand, and optimize the logistics scheme. The model takes minimum logistics cost and resource adjustment cost as the objective function, and takes supply and demand capacity, transportation capacity, mass balance, and resource adjustment rules as *** adjustment rules are considered in the model, including resource adjustment within oil suppliers,within oil consumers, and between oil consumers. The model is tested on a large-scale primary logistics of a state-owned petroleum enterprise, involving 37 affiliated refineries, 31 procurement departments,286 market depots and dedicated consumers. After the unified optimization, the supply and demand imbalance is eased by 97% and the total cost is saved by 7%, which proves the effectiveness and applicability of the proposed model.

关键词： Oil product logistics Supply and demand imbalance Petroleum enterprise Resource adjustment Mathematical Programming model

Synthetic Turbulence Constructed by Self-Learning Fractal Interpolation

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Chinese Physics Letters 2012年第10期29卷 125-128页

作者： WANG Yan-Zhi ZHANG Zhi-Xiong SHI yi-Peng SHE Zhen-Su State Key Laboratory of Turbulence and Complex Systems and College of Engineering Peking UniversityBeijing 100871 Beijing Aeronautical Science and Technology Research Institute of COMAC Future Science&Technology Park Changping DistrictBeijing 102211

A self-learning fractal interpolation algorithm to construct synthetic fields with statistical properties close to real turbulence is *** from our previous work[***.E 84(2011)026328,82(2010)036311],the position mapping and stretching factors between the adjacent large and small scales are learned from the initial *** this method,a turbulence-like field with K41 spectra and without dissipation is constructed well through a coarse grid velocity signal from one experiment's *** filtering the interpolated signal appropriately,the probability distribution of velocity,velocity structure functions and the anomalous scaling law of the synthetic field are close to those of the original signal.

关键词： turbulence stretching interpolation

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新疆尼勒克县松湖铁矿矿石加工技术性能探讨

资源环境与工程 2011年第3期25卷 277-279,283页

作者：任毅赵强周昌平新疆维吾尔自治区地质矿产勘查开发局第七地质大队新疆乌苏833000

通过对新疆尼勒克县松湖铁矿矿石的选矿试验,认为松湖铁矿区的矿石工业开发利用性能较好,选矿工艺流程简单,生产成本可有效控制,生成的成品符合钢铁生产的质量要求,矿石中的有益元素Co、S作为副产品,可综合回收利用,实际生产数据证实松... 详细信息

通过对新疆尼勒克县松湖铁矿矿石的选矿试验,认为松湖铁矿区的矿石工业开发利用性能较好,选矿工艺流程简单,生产成本可有效控制,生成的成品符合钢铁生产的质量要求,矿石中的有益元素Co、S作为副产品,可综合回收利用,实际生产数据证实松湖铁矿选矿试验工艺流程合理、可靠。

关键词：矿石原矿性质选矿试验有益元素

Experimental investigation of tubing collar's influence on hydrodynamic behavior of annular duct flow

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Petroleum Science 2022年第5期19卷 2326-2342页

作者： yi-Su Zhou Zhong-Wei Huang Zhuang-Zhuang Zhang Tian-Wen Jiang Rui-Yue Yang Ming-He Zhang State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum ChangpingBeijing 102249China China University of Petroleum(Beijing) ChangpingBeijing 102249China

Tubing collars’influence on hydrodynamic behavior of annular duct flow has been investigated using Particle Image Velocity(PIV)*** has become an efficient method for complex transient flows visualization.A water flow loop with two replaceable variable cross-sections(VCS),75-90 mm and 90-110 mm,in a 129 mm inner diameter(ID)pipe was *** whole field of the variable cross-section annulus(VCSA)was visualized,including forward-facing step(FFS),narrow annulus(NA),and backwardfacing step(BFS)*** VCSA ratio and Reynolds(Re)number influence on streamline distribution,velocity distribution,and turbulence intensity were *** showed that the recirculation is easier to form in BFS than FFS flow under the same *** VCSA ratio affects the formation of recirculation zones and the location of the reattachment *** number mainly affects BFS flow by influencing the main velocity component-axial *** turbulence intensity is relatively high in BFS than FFS flow and is larger at y/h>1.0 than y/h<***,the streamwise cohere nt structures reveal that the first two modes are predominant and represent the main characteristics of the flow by proper orthogonal decomposition(POD)method.

关键词： Variable cross-section annulus flow Sudden contraction and expansion Hydrodynamic behavior PIV POD

Emotion Regulation Effect of Baduanjin on College Students:A Pilot Event-Related Potential Study on Late Positive Potential

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World Journal of Traditional Chinese Medicine 2021年第4期7卷 408-413页

作者： Qiang Gu Qing-Chuan Hu Yu-Long Wei Kevin Chen Jing-Jing Dong Shen-yi Li Wei-Wei Wang yi-Bin Zheng Internal Medicine Department The First People's Hospital of Dongcheng DistrictBeijing ENNOVA Institute of Life Science and Technology ENN GroupLangfang School of Acupuncture-Moxibustion and Tuina Beijing University of Chinese MedicineBeijingChina Center for Integrative Medicine University of Maryland School of MedicineBaltimoreMDUSA Faculty of Physical Education ShenZhen UniversityShenzhen Massage Department Beijing Changping District Hospital of Traditional Chinese and Western MedicineBeijingChina

Objective:This study aimed to investigate the emotion regulation effect of Baduanjin Qigong on college ***:The late positive potential(LPP)components were recorded while performing emotional pictures from 12 college students with Baduanjin Qigong experience and 12 with no experience of any mind–body ***:Under positive emotional stimuli,greater LPP amplitudes were observed in the experimental group in the frontal,central,and temporal areas than in the control *** negative emotional stimuli,greater LPP amplitudes were found in the experimental group in the prefrontal area and smaller amplitudes in the occipital area than in the control ***:The results reveal the emotion regulation effect on the event-related potential of Baduanjin Qigong to college *** findings suggest that the regulatory effect of Baduanjin Qigong on emotional stimulation may be a possible reason for reducing the symptoms of depression and anxiety.

关键词： Baduanjin emotion event-related potential mind–body exercises qigong

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实践技能竞赛与大学生综合素质培养的探索

实验技术与管理 2012年第10期29卷 18-20,32页

作者：蔺万煌吕长平苏益张学文肖浪涛湖南农业大学生物科学技术学院湖南长沙410128 湖南农业大学教务处湖南长沙410128

实践技能竞赛是大学生综合素质培养的重要途径之一。近年来,湖南农业大学植物科学实验教学中心通过开展以植物生物多样性、植物生理生化实验、生物学实验和中国茶文化等为主题内容的大学生实践技能竞赛,探索综合素质人才培养模式,对深... 详细信息

实践技能竞赛是大学生综合素质培养的重要途径之一。近年来,湖南农业大学植物科学实验教学中心通过开展以植物生物多样性、植物生理生化实验、生物学实验和中国茶文化等为主题内容的大学生实践技能竞赛,探索综合素质人才培养模式,对深化实践教学改革,培养学生创新意识和团队合作精神,提升大学生实践能力和就业竞争力等方面具有重要借鉴作用。

关键词：实践技能竞赛综合素质人才培养