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新型电力系统保护控制技术架构研究

浙江电力 2024年第1期43卷 1-11页

作者：吴振杰王源涛方愉冬胡晨马伟王彤王嘉琦国网浙江省电力有限公司杭州供电公司杭州310009 国网浙江省电力有限公司杭州310007 新能源电力系统国家重点实验室(华北电力大学) 北京102206

随着新能源的不断接入,电力系统结构、运行控制方式变得更为复杂,对保护控制技术提出了更高要求。为此,提出了一种新型电力系统保护控制技术架构。为预防单一事故向系统性事故发展,提出新型继电保护构成模式,构建更加完善的第一道防线... 详细信息

随着新能源的不断接入,电力系统结构、运行控制方式变得更为复杂,对保护控制技术提出了更高要求。为此,提出了一种新型电力系统保护控制技术架构。为预防单一事故向系统性事故发展,提出新型继电保护构成模式,构建更加完善的第一道防线。结合系统性事故演变过程,建立保护和控制系统之间的信息融合及协同机制,通过站域自治-区域协同的方式实现自治式保护控制策略,优化三道防线的功能布局,有效抑制和阻断系统性事故的发生与发展,提升新型电力系统的安全防御能力。

关键词：新型电力系统保护与控制技术架构

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基于注意力机制的安全帽佩戴状态检测模型

中国安全生产科学技术 2024年第8期20卷 196-202页

作者：韩飞腾刘永强房玉东冯涛郭玮薛明姬玉成应急管理部大数据中心北京100013 清华大学自动化系北京100084

为缓解安全生产视频监控场景下物体尺寸小、背景复杂、遮挡容易导致的安全帽佩戴状态漏检、误检、定位不准等问题,提出1种基于注意力机制的2阶段高精度安全帽佩戴状态检测模型。提出双向多层连接融合的特征金字塔网络,并设计基于编解码... 详细信息

为缓解安全生产视频监控场景下物体尺寸小、背景复杂、遮挡容易导致的安全帽佩戴状态漏检、误检、定位不准等问题,提出1种基于注意力机制的2阶段高精度安全帽佩戴状态检测模型。提出双向多层连接融合的特征金字塔网络,并设计基于编解码的空间注意力机制去除冗余特征,提升小尺寸目标的召回率;采用多尺度卷积提取候选区域多层上下文特征,并利用注意力机制对不同层级、不同尺度的上下文特征进行显式加权,进而提高模型在复杂背景下的鲁棒性;解耦候选区域分类和定位网络,分别引入通道注意力和空间注意力提升模型分类和定位精度。研究结果表明:基于注意力机制的安全帽佩戴状态检测模型整体上优于当前相对主流的高精度检测框架,如YOLOv3、SSD、RetinaNet、Faster R-CNN、TridentNet模型。研究结果可有效缓解安全生产视频监控场景下安全帽佩戴状态的漏检、误检和定位不准等问题。

关键词：安全生产安全帽佩戴状态检测目标检测注意力机制特征金字塔

Experimental studies on electrical breakdown field strength of electrode with water mist containing MC additives

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Chinese Science Bulletin 2005年第23期50卷 2783-2788页

作者： fang yudong LIU Jianghong LIAO Guangxuan XU Qiang ZHOU Xiaomeng State Key Laboratory of Fire Science University of Science & Technology of China Hefei 230027 China School of Mechanical Engineering Nanjing University of Science & Technology Nanjing 210094 China

Water mist is one of the effective candidates for halon replacement used in electrical environment fire protec-tion. Water mist additives may greatly enhance fire suppres-sion effectiveness. In electrical environment, electrical breakdown field strength (E) is one of the important factors that control the performance of electrical equipment. In this study the variation principles of electrical breakdown field strength and the electrical characteristics of MC additives were investigated by electrode discharging experiments. Ex-perimental results showed that electrical breakdown field strength was impacted obviously by the conductive metal ions and insulated fluorocarbon surfactants in MC additives. The attenuation percentages of E in different experimental cases were described, thus providing scientific guidance for the use of water mist and MC additives in electrical fire sup-pression.

关键词：消防电环境灭火电极水雾 MC添加剂电击穿磁场强度卤代烷灭火剂替代品

Experimental studies on interaction of water mist with class K fires

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Chinese Science Bulletin 2006年第24期51卷 3053-3058页

作者： fang yudong ZHANG Yongfeng LIN Lin LIAO Guangxuan HUANG Xin CONG Beihua University of Science & Technology of China State Key Laboratory of Fire Science Hefei 230026 China

Interaction of water mist with cooking oil fires is studied experimentally and theoretically. A LDV/APV system is used to measure the velocity and diameter of water mist at different pressures in the experiments,and the effect of water mist velocity and diameter on fire extinguishment efficiency is investi-gated. The experimental results show that water mist has excellent surface cooling effect; it can control and extinguish cooking oil fires quickly without re-ignition. The critical temperature (Tfo) is calculated by energy balance equation,and the fire plume momentum is calculated and compared with that of water mist in order to determine the critical velocity (νwy) of fire extinguishment. This paper provides references for cooking oil fires extinguishment with water mist.

关键词：水雾 K级火灾食用油油类燃烧重新起火灭火效果

SlWRKY30 and SlWRKY81 synergistically modulate tomato immunity to Ralstonia solanacearum by directly regulating SlPR-STH2

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Horticulture Research 2023年第5期10卷 99-111页

作者： Fengfeng Dang Jinhui Lin Yajing Li Ruoyun Jiang yudong fang Fei Ding Shuilin He Yanfeng Wang State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources College of Life SciencesSouth China Agricultural UniversityGuangzhou 510642China Shaanxi Key Laboratory of Chinese Jujube Yan’an UniversityYan’anShaanxi 716000China College of Agriculture Fujian Agriculture and Forestry UniversityFuzhou 350002China College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 350002China School of Life Sciences Liaocheng UniversityLiaocheng 252000China

Bacterial wilt is a devastating disease of tomato(Solanum lycopersicum)caused by Ralstonia solanacearum that severely threatens tomato *** III WRKY transcription factors(TFs)are implicated in the plant response to pathogen infection;however,their roles in the response of tomato to *** infection(RSI)remain largely ***,we report the crucial role of SlWRKY30,a group III SlWRKY TF,in the regulation of tomato response to ***30 was strongly induced by ***30 overexpression reduced tomato susceptibility to RSI,and also increased H2O2 accumulation and cell necrosis,suggesting that SlWRKY30 positively regulates tomato resistance to *** sequencing and reverse transcription–quantitative PCR revealed that SlWRKY30 overexpression significantly upregulated pathogenesis-related protein(SlPR-STH2)genes SlPR-STH2a,SlPR-STH2b,SlPR-STH2c,and SlPR-STH2d(hereafter SlPR-STH2a/b/c/d)in tomato,and these SlPR-STH2 genes were directly targeted by ***,four group III WRKY proteins(SlWRKY52,SlWRKY59,SlWRKY80,and SlWRKY81)interacted with SlWRKY30,and SlWRKY81 silencing increased tomato susceptibility to *** SlWRKY30 and SlWRKY81 activated SlPR-STH2a/b/c/d expression by directly binding to their *** these results together,SlWRKY30 and SlWRKY81 synergistically regulate resistance to RSI by activating SlPR-STH2a/b/c/d expression in *** results also highlight the potential of SlWRKY30 to improve tomato resistance to RSI via genetic manipulations.

关键词： directly synergistic immunity

Study on variation of smoke component concentration with water mist applying

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Engineering Sciences 2014年第3期12卷 58-64页

作者： fang yudong Communication and Information Center State Administration of Work Safety Beijing 100013 China

Interaction between water mist and fire smoke is studied by experiments in an ISO 9705 room, The variation of 02, CO and CO2 concentration is disclosed, and the mathematical models of smoke component con- centration with water mist pressure and ventilation speed are established according to the experimental results. It is found in the experiment that the smoke component concentration will break when ventilation speed exceeds 1.5 kg/s. This paper provides necessary theory for water mist technology using in smoke restraining.

关键词： water mist O2 CO CO2

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一起特殊跨线引起故障线路保护动作的分析

电力系统自动化 2008年第15期32卷 104-107页

作者：陈水耀裘愉涛方愉冬浙江电力调度通信中心浙江省杭州市310007

针对某220kV线路发生的一起特殊跨线故障,利用等效电流和序分量法,求解线路故障时的电气量,分析故障时线路保护的动作行为。分析结果与录波数据和动作报告完全吻合,表明在跨线故障时传统的线路保护存在误选相和保护拒动的可能性。根据... 详细信息

针对某220kV线路发生的一起特殊跨线故障,利用等效电流和序分量法,求解线路故障时的电气量,分析故障时线路保护的动作行为。分析结果与录波数据和动作报告完全吻合,表明在跨线故障时传统的线路保护存在误选相和保护拒动的可能性。根据不同原理保护在跨线故障时的行为,提出同杆并架线路的保护配置方案。

关键词：线路保护跨线故障等效电流动作行为保护配置

Improving iconic memory through contrast detection training with HOA-corrected vision

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Fundamental Research 2024年第1期4卷 95-102页

作者： Ling Gong Junlei Zhao Yun Dai Zili Wang fang Hou yudong Zhang Zhong-Lin Lu Jiawei Zhou State Key Laboratory of Ophthalmology Optometry and Vision ScienceEye HospitalSchool of Ophthalmology and OptometryWenzhou Medical UniversityWenzhou 325027China Institute of Optics and Electronics Chinese Academy of SciencesChengdu 610209China The Key Laboratory of Adaptive Optics Chinese Academy of SciencesChengdu 610209China Chengdu University of Traditional Chinese Medicine Chengdu 610075China Division of Arts and Sciences New York University ShanghaiShanghai 200126China Center for Neural Science Department of PsychologyNew York UniversityNew York 10003United States NYU-ECNU Institute of Brain and Cognitive Science at NYU Shanghai Shanghai 200062China

Iconic memory and short-term memory are not only crucial for perception and cognition,but also of great importance to mental ***,we first showed that both types of memory could be improved by improving limiting processes in visual processing through perceptual *** adults were trained in a contrast detection task for ten days,with their higher-order aberrations(HOA)corrected in *** found that the training improved not only their contrast sensitivity function(CSF),but also their iconic memory and baseline information maintenance for short-term memory,and the relationship between memory and CSF improvements could be well-predicted by an observer *** results suggest that training the limiting component of a cognitive task with visual perceptual learning could improve visual *** may also provide an empirical foundation for new therapies to treat people with poor sensory memory.

关键词： Perceptual learning Iconic memory Higher-order aberrations Contrast sensitivity Short-term memory

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浅析宁波港港口物流的集疏运系统优化

物流技术 2013年第3期32卷 130-132+150页

作者：方煜东北京交通大学中国产业安全研究中心

集疏运系统是实现当前我国港口物流服务中效率与效益共同提升的关键性因素。通过分析宁波港口物流集疏运系统发展现状与问题,从系统协调优化的角度出发,运用组合预测模型对宁波港口物流系统吞吐量进行科学预测,进而构建集疏运系统优化... 详细信息

集疏运系统是实现当前我国港口物流服务中效率与效益共同提升的关键性因素。通过分析宁波港口物流集疏运系统发展现状与问题,从系统协调优化的角度出发,运用组合预测模型对宁波港口物流系统吞吐量进行科学预测,进而构建集疏运系统优化模型。最后,从集疏运交通体系、管理服务体系角度出发,为宁波港口物流集疏运系统的优化管理提出一系列的对策建议。

关键词：宁波港港口物流集疏运系统优化