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Time-efficient Strategic Power Dispatch for District Cooling Systems Considering Evolution of Cooling Load Uncertainties

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CSEE Journal of Power and Energy Systems 2022年第5期8卷 1457-1467页

作者： ge chen Biao Yan Hongcai Zhang Dongdong Zhang Yonghua Song State Key Laboratory of Internet of Things for Smart City and Department of Electrical and Computer Engineering University of MacaoMacao 999078China

District cooling system(DCS)provides centralized chilled water to multiple buildings for air conditioning with high energy-efficiency and operational *** is one of the most popular cooling systems for large buildings in modern cities and an important demand response source for power *** order to enhance its energy efficiency and utilize its flexibility,strategic operation is ***,finding an optimal policy for DCS operation is a challenging task because of the high inter-connectivity among *** evolution of cooling load uncertainties further increases the *** paper addresses the aforementioned challenges by proposing a novel optimal power dispatch model for *** proposed model optimizes water temperature and mass flow rates simultaneously to improve the energy efficiency as much as *** also explicitly describes the uncertainty accumulation and ***-constrained programming is employed to guarantee the cooling service *** further propose a more timeefficient formulation to overcome the computational intractability caused by the non-smooth and non-convex *** experiments based on a real DCS confirm that a time-efficient formulation can save about half of solution time with negligible cost increase.

关键词： District cooling system HVAC cooling power dispatch demand-side flexibility chance-constrained programming

Microcosmic mechanism and correction of moisture effect on furfural diffusion and equilibrium in oil‐paper insulation

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High Voltage 2023年第4期8卷 772-780页

作者： Dawei Feng ge chen Yuandi Lin Ruijin Liao Dayong Yuan State Key Lab of Reliability and Intelligence of Electrical Equipment School of Electrical EngineeringHebei University of TechnologyTianjinChina The MOE Key Laboratory of Special Machine and High Voltage Apparatus School of Electrical EngineeringShenyang University of TechnologyShenyangChina State Grid Jiangsu Electric Power Company Research Institute NanjingChina State Key Laboratory of Power Transmission Equipment&System Security and New Technology School of Electrical EngineeringChongqing UniversityChongqingChina TBEA Shenyang Transformer Group Co. LtdShenyangChina

Furfural content in oil is considered as an effective parameter to evaluate the ageing state of oil-immersed *** previous thermal ageing experiments at 130℃,we found that moisture increment in oil-paper system makes more furfural distribute in ***,the microcosmic mechanism of moisture effect on furfural diffusion from paper to oil is still unknown,and the furfural equilibrium law at transformers'typical operating temperatures is also unclear,resulting in the unreliability of the existed furfural evaluation *** elucidate the above problems,molecular dynamics simulation and furfural equilibrium experiments at 60℃ were carried out at different moisture *** results show that high moisture content makes part of furfural diffuse from paper to oil *** moisture content increases from 1% to 2%,mass fraction of furfural in oil may increase from 32.98% to 49.83%,leading to furfural content in oil increases from 0.76 mg/L to 1.06 mg/L when the degree of polymerisation of insulation paper is about 524,which increased by 39.5%.The increase in moisture content makes cellulose form hydrogen bonds with H_(2)O preferentially,decreasing the hydrogen bonds interaction between cellulose and ***,partial furfural falls off cellulose and diffuses into oil,leading to an increase in furfural content in *** eliminate the moisture interference,a corrected furfural assessment model based on the moisture equilibrium curve has been constructed,which can accurately evaluate the ageing state of insulation paper regardless of the moisture influence.

关键词： equilibrium insulation diffusion

认知众包模式下的总体城市意象特色分析方法与广州市实践

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规划师 2024年第6期40卷 118-127页

作者：陈戈李佳宇郭文博兰文龙朱骁广州市城市规划勘测设计研究院有限公司城市设计策划所西安建筑科技大学东南大学

引入“认知众包”这一概念,以社交媒体数据为信息抓手,以广州市为分析对象,逐级阐释“理论探析—信息提炼—转译分析”的意象特色解析流程:通过意象特色属性与社媒数据的特征拟合,构建场景特色与攻略特色结合的数字化总体城市意象特色体... 详细信息

引入“认知众包”这一概念,以社交媒体数据为信息抓手,以广州市为分析对象,逐级阐释“理论探析—信息提炼—转译分析”的意象特色解析流程:通过意象特色属性与社媒数据的特征拟合,构建场景特色与攻略特色结合的数字化总体城市意象特色体系;以可意象性数字量化为技术主轴,提出众包型意象特色的信息提炼框架,搭建从网络素材到认知信息再到意象要素的提炼途径;将要素频次作为统计归纳的基础,从强度、等级、空间分布等方面对意象特色进行整合剖析,得到广州市三能级交互的意象特色体系。同时,捕捉到意象特色在新方法的促进下形成的变化模式、创新动力和问题体现等情况,构建一个非介入式的公众认可的广州城市特色体系,实现可读、可看、可感知的意象分析再创新。

关键词：城市特色城市意象认知地图社交媒体设计规划广州市

On multiple testing,validation of gene expression profiling,and translational research

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中华医学杂志(英文版) 2008年第13期121卷 1247-1248页

作者： ZHAO Yu-pei chen ge Departmem of general Surgery Peking Union Medical College Hospital Beijing 100730 China）

To the editor:With great interest,we read the recent article by Zhao et al,in which the authors performed a genome-wide screen for genes that are associated with multi-drug resistance *** authors concluded that construction of a chemoresistance prediction rule,based on gene expression patterns, is practical and that their results may be useful for the detection and treatment of MDR in pancreatic cancer patients.

关键词： PANCREATIC-CANCER CELLS RESISTANCE

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天长万寿垃圾填埋场地下水污染预测分析

地下水 2024年第2期46卷 62-65页

作者：杨力伟陈戈郭伟安徽省地勘局第一水文工程地质勘查院安徽蚌埠233000

在非正常工况下,垃圾填埋场会对地下水环境造成不利影响。天长万寿垃圾场缺少相应的污染防治措施,严重威胁着当地地下水环境。本文结合天长万寿垃圾填埋场实际情况,根据垃圾填埋场周边水文地质概况,采用数值模拟情况对预测因子的运移进... 详细信息

在非正常工况下,垃圾填埋场会对地下水环境造成不利影响。天长万寿垃圾场缺少相应的污染防治措施,严重威胁着当地地下水环境。本文结合天长万寿垃圾填埋场实际情况,根据垃圾填埋场周边水文地质概况,采用数值模拟情况对预测因子的运移进行分析,对区域地下水污染情况进行预测评价。结果表明,该垃圾填埋场污染因子污染范围显著超标,亟需采取隔离处置。建议加强对污染物的运移观测,尽快采取措施,治理垃圾填埋场对地下水环境的污染。

关键词：垃圾填埋场地下水污染预测分析

露采矿山溜井工程防治水技术研究——以安徽贵池神山灰岩矿2#溜井防治水工程为例

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安徽地质 2024年第1期34卷 56-59,76页

作者：崔伟杨力伟陈戈安徽省地质矿产勘查局312地质队安徽蚌埠233040 安徽省地勘局第一水文工程地质勘查院安徽蚌埠233000

为有效防治安徽省贵池区神山灰岩矿2#溜井井壁长期涌水,在查明矿山溜井壁后岩溶水文地质条件的基础上,结合目前防治水技术的最新研究成果,提出了一种疏水井+排水廊道+引水孔+井壁涌水点封堵的防治水方法,经实践表明,这种方法能有效疏排... 详细信息

为有效防治安徽省贵池区神山灰岩矿2#溜井井壁长期涌水,在查明矿山溜井壁后岩溶水文地质条件的基础上,结合目前防治水技术的最新研究成果,提出了一种疏水井+排水廊道+引水孔+井壁涌水点封堵的防治水方法,经实践表明,这种方法能有效疏排溜井井壁后的岩溶水,防止井壁长期涌水,为类似矿山溜井防治水工程提供参考。

关键词：露采矿山溜井疏排防治水

The geometry of mesoscale eddies in the South China Sea: characteristics and implications

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International Journal of Digital Earth 2021年第4期14卷 464-479页

作者： Guiyan Han Fenglin Tian Chunyong Ma ge chen Department of Marine Technology Institute for Advanced Ocean StudyOcean University of ChinaQingdaoPeople’s Republic of China Qingdao National Laboratory for Marine Science and Technology QingdaoPeople’s Republic of China

The symmetrical circular shape of mesoscale eddies has been widely used in their scientific ***,an elliptical average eddy shape has been confirmed for eddies in the global ocean using multi-satellite altimeter *** a regional extension of a previous study on the geometry of global eddies,a mean eddy shape in the South China Sea(SCS)has been derived by averaging a large number of orientational eddy *** mean shape is approximately a mathematic ellipse with a semimajor axis of 101.3 km and a semiminor axis of 61.3 *** size is larger than the global *** principal eddy orientation in the SCS is 74°/254°(nearly northeast-southwest),different from that of eddies in the global ocean(171°/351°,nearly east–west).Composite analyses of chlorophyll(CHL)concentrations and sea surface temperature anomalies(SSTA)indicate a dipole structure for circular eddies in the non-rotated coordinate *** a monopole structure for elliptical eddies in the eddy-centric coordinate system is *** results demonstrate that the elliptical shape of eddies affects oceanographical *** findings provide a new approach for exploring the role of air–sea interactions on oceanic eddies.

关键词： Mesoscale eddies eddy shape eddy orientation South China Sea

A Coastal Zone Segmentation Variational Model and Its Accelerated ADMM Method

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Journal of Ocean University of China 2017年第6期16卷 1081-1089页

作者： HUANG Baoxiang chen ge ZHANG Xiaolei YANG Huan College of Computer Science and Technology Postdoctoral stations of system scienceQingdao University College of Information Science and Engineering Ocean University of China

Effective and efficient SAR image segmentation has a significant role in coastal zone interpretation. In this paper, a coastal zone segmentation model is proposed based on Potts model. By introducing edge self-adaption parameter and modifying noisy data term, the proposed variational model provides a good solution for the coastal zone SAR image with common characteristics of inherent speckle noise and complicated geometrical details. However, the proposed model is difficult to solve due to to its nonlinear, non-convex and non-smooth characteristics. Followed by curve evolution theory and operator splitting method, the minimization problem is reformulated as a constrained minimization problem. A fast alternating minimization iterative scheme is designed to implement coastal zone segmentation. Finally, various two-stage and multiphase experimental results illustrate the advantage of the proposed segmentation model, and indicate the high computation efficiency of designed numerical approximation algorithm.

关键词： coastal zone segmentation variational Potts model alternating direction method with multipliers edge self-adaption

i4Ocean: transfer function-based interactive visualization of ocean temperature and salinity volume data

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International Journal of Digital Earth 2021年第6期14卷 766-788页

作者： Fenglin Tian Qing Mao Yazhen Zhang ge chen Department of Marine Technology Ocean University of ChinaQingdaoPeople’s Republic of China Qingdao National Laboratory for Marine Science and Technology QingdaoPeople’s Republic of China

In this paper,we present a novel ocean visualization framework,which focuses on analyzing multidimensional and spatiotemporal ocean ***-based visualization methods are explored to effectively visualize ocean *** improved ray casting algorithm for heterogeneous multisection ocean volume data is presented.A two-layer spherical shell is taken as the ocean data proxy geometry,which enables oceanographers to obtain a real geographic background based on global *** efficient ray sampling technique including an adaptive sampling technique and a preintegrated transfer function is proposed to achieve high-effectiveness and high-efficiency ***,an interactive transfer function is also designed to analyze the 3D structure of ocean temperature and salinity anomaly *** on the framework,an integrated visualization system called i4Ocean is *** visualization of ocean temperature and salinity anomalies extracted interactively by the transfer function is demonstrated.

关键词： Ocean temperature and salinity data ray casting algorithm transfer function spherical volume rendering GPU