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灵活性负荷参与电网调度的经济优化运行

科学技术与工程 2024年第7期24卷 2767-2774页

作者：崔喾张新燕何广渝王志磊王显岚张洪图新疆大学电气工程学院乌鲁木齐830047

在“碳达峰、碳中和”的背景下,大规模新能源并网使系统出现了调峰压力大、新能源消纳难等问题。随着灵活性负荷占比的不断增大,根据灵活性负荷的不同特性,针对系统面临的问题提出了“源-网-荷-储”相协调的双层优化运行模型。首先,基... 详细信息

在“碳达峰、碳中和”的背景下,大规模新能源并网使系统出现了调峰压力大、新能源消纳难等问题。随着灵活性负荷占比的不断增大,根据灵活性负荷的不同特性,针对系统面临的问题提出了“源-网-荷-储”相协调的双层优化运行模型。首先,基于分时电价策略引导用户用电行为,建立提升源荷双方综合满意度以及净负荷波动最小的上层多目标模型,利用粒子群算法对上层模型进行求解得到优化后的负荷需求响应并带入下层模型中。其次,根据源荷双方的供需关系,确定参与调度灵活负荷的运行方式,构建以系统调度运行成本最小为目标的下层模型,并采用Cplex求解器求解。最后,以某地区实际系统为例,结果表明了灵活性负荷参与电网调度可缓解电网调峰压力,提高了可再生能源消纳能力,并验证了本文所提模型的有效性。

关键词：分时电价策略灵活性负荷系统调度源-网-荷-储

Failure mechanism of a large-scale composite deposits caused by the water level increases

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Journal of Mountain Science 2023年第5期20卷 1369-1384页

作者： ZHANG xin tu Guo-xiang LUO Qi-feng TANG Hao ZHANG Yu-lin LI An-run State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China

The failure of slope caused by variations in water levels on both banks of reservoirs is *** landslides greatly threaten the safety of reservoir *** large-scale composite deposits located on the Lancang River in Southwest China as a study case,the origin of the deposits was analyzed based on the field investigation and a multi-material model was established in the physical model *** with numerical simulation,the failure mechanism of the composite deposits during reservoir water level variations was *** results indicate that the deformation of the large-scale composite deposits is a staged sliding mode during the impoundment *** first slip deformation is greatly affected by the buoyancy weight-reducing effect,and the permeability of soil and variation in the water level are the factors controlling slope deformation *** high water sensitivity and low permeability of fine grained soil play an important role in the re-deformation of deposits *** the impoundment process,the deformation trend of the deposit slope is decreasing,and vertical consolidation of soil and increasing hydrostatic pressure on the slope surface are the main reasons for deformation *** is considered that the probability of large-scale sliding of the deposits during the impoundment period is *** the damage caused by local bank collapse of the deposit slope still needs *** results of this paper will further improve our understanding of the failure mechanism of composite deposits caused by water level increases and provide guidance for the construction of hydropower stations.

关键词： Composite deposits Reservoir water level rise Physical model test Finite-differencemethod Failure mechanism

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再生塑料管控政策及其智能鉴定研究综述

包装学报 2024年第2期16卷 78-86页

作者：李虹陈寿王鑫曾平张智寰涂建国深圳市八六三新材料技术有限责任公司广东深圳518117

对全球多个国家,特别是欧美国家和中日韩等亚太国家,塑料生产、回收和再利用的相关政策和法规进行了梳理;对再生塑料成分和含量的鉴定技术进行了归纳总结。研究结果表明:发达国家和发展中大国对塑料管控相对较好,既有近期规划又有远景目... 详细信息

对全球多个国家,特别是欧美国家和中日韩等亚太国家,塑料生产、回收和再利用的相关政策和法规进行了梳理;对再生塑料成分和含量的鉴定技术进行了归纳总结。研究结果表明:发达国家和发展中大国对塑料管控相对较好,既有近期规划又有远景目标;再生塑料的鉴定技术和方法正在快速发展和完善。在不远的将来,会实现塑料的高效回收和循环利用,也会开发出简便、快速、精准的再生塑料鉴定方法。

关键词：再生塑料塑料废弃物包装法律法规循环利用

Advancing approach and toolbox in optimization of chloroplast genetic transformation technology

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Journal of Integrative Agriculture 2023年第7期22卷 1951-1966页

作者： LIU Yu-xin LI Fan GAO Liang tu Zhang-li ZHOU Fei LIN Yong-jun National Key Laboratory of Crop Genetic Improvement/College of Life Science and Technology Huazhong Agricultural UniversityWuhan 430070P.R.China Hubei Hongshan Laboratory Wuhan 430070P.R.China Wuhan Towin Biotechnology Co. Ltd.Wuhan 430070P.R.China

Chloroplast is a discrete,highly structured,and semi-autonomous cellular *** small genome of chloroplast makes it an up-and-coming platform for synthetic *** a special means of synthetic biology,chloroplast genetic engineering shows excellent potential in reconstructing various sophisticated metabolic pathways within the plants for specific purposes,such as improving crop photosynthetic capacity,enhancing plant stress resistance,and synthesizing new drugs and ***,many plant species exhibit limited efficiency or inability in chloroplast genetic ***,new transformation technologies and tools are being constantly *** order to further expand and facilitate the application of chloroplast genetic engineering,this review summarizes the new technologies in chloroplast genetic transformation in recent years and discusses the choice of appropriate synthetic biological elements for the construction of efficient chloroplast transformation vectors.

关键词： chloroplast genetic engineering new technology plasmid optimization nanotechnology

An improved LuGre model for calculating static steering torque of rubber tracked chassis

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Defence Technology（防务技术） 2022年第5期18卷 797-810页

作者： Kang Liang Qun-zhang tu xin-min Shen Zhong-hang Fang Xuan Yang Yong Zhang Hui-yu Xiang College of Field Engineering Army Engineering University of PLANanjing210007China State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery Xuzhou Construction Machinery GroupXuzhou221004China

Tire and rubber track interchangeable chassis combines the advantages of tire and rubber track,which can greatly improve the maneuverability of military construction ***,there is almost no effective calculation model for the real-time static steering *** the relative sliding speed is greater than 0.01 m/s,the influence of friction heating can not be *** improved LuGre model is established to calculate the static real-time steering torque of tire and rubber track interchangeable ***,the friction heating model between rubber and ground is *** with the influence of temperature on the dynamic performance of rubber material,the influence of friction heating on the stiffness and friction coefficient of rubber track is analyzed,and the improved LuGre friction model is *** steering torque of tire and rubber track interchangeable chassis is affected by rubber material properties,steering speed,pavement type,and ambient *** with the original Lu Gre model,the improved LuGre model captures the change in friction torque during multiple in-situ turns due to frictional *** error with the experimental data is small,which verifies the effectiveness of the improved LuGre model.

关键词： Rubber track Static steering torque Friction model Chassis Maneuverability Vehicle

Yielding behavior of triplex medium Mn steel alternated with cooling strategies altering martensite/ferrite interfacial feature

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Journal of Materials Science & Technology 2022年第31期126卷 60-70页

作者： Bin Hu Xiao Shen Qinyi Guo Qinghua Wen xin tu Cancan Ding Fanglin Ding Wenwen Song Haiwen Luo School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Steel Institute RWTH Aachen UniversityIntzestraße 152072 AachenGermany

In this paper, we report the influence of cooling processes on the yielding behavior of a medium Mn steel(MMS) with triplex microstructure, i.e. austenite(γ), ferrite(α) and as-quenched martensite(α’). After the intercritical annealing(IA) at both 725℃ and 750℃, the steel was subjected to the two cooling processes, i.e. air cooling(AC) and water quenching(WQ). It exhibits the discontinuous yielding after the AC following the IA at 750℃ while the continuous yielding after the WQ. Compared with WQ process,both the dilatometry and the microstructural examinations show that the AC process leads to lower Ms temperature, larger retained austenite(RA) fraction and less martensite, the latter is always companied with geometry necessary dislocations(GNDs) generated near the α/α’ interfaces. Considering the complexity of nanosized tri-phases in this steel, the presence of martensite with key features in the resultant specimens was systematically examined by atom probe tomography(APT) on the samples prepared by the specific target lift-out method. The APT results directly revealed the C/Mn co-segregation at the α’/αinterfaces in the AC samples but not in WQ samples. The numerical simulation results further suggest that the segregation of C and Mn at the α’/α interfaces may be due to different mechanisms. We conclude that the yielding of triplex MMS is determined by both the quantity of GNDs generated near theα/α’ interfaces, which increases with martensite fraction, and the extent of their immobilization resulting from the interfacial segregation of solute atoms when the presence of martensite is sufficient. WQ tends to suppress the discontinuous yielding of MMS since the rapid cooling may promote more martensite formed with the increasing quantity of GNDs and prevent the interfacial segregation of both C and Mn.

关键词： Triplex medium Mn steel Phase boundary Segregation Discontinuous yielding

中医护理对乳腺癌化疗病人恶心呕吐防治效果的网状Meta分析

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全科护理 2024年第10期22卷 1810-1815页

作者：张思易涂发妹张鑫冯琦凡吴季敏南昌大学第一附属医院 330000 南昌大学江西医学院护理学院 330000

目的:采用网状Meta分析方法,对防治乳腺癌化疗病人恶心呕吐的不同中医护理措施效果进行评估和比较。方法:计算机检索Embase、PubMed、Web of Science、the Cochrane Library、CINAHL、中国知网等数据库公开发表的缓解乳腺癌病人化疗期... 详细信息

目的:采用网状Meta分析方法,对防治乳腺癌化疗病人恶心呕吐的不同中医护理措施效果进行评估和比较。方法:计算机检索Embase、PubMed、Web of Science、the Cochrane Library、CINAHL、中国知网等数据库公开发表的缓解乳腺癌病人化疗期间恶心呕吐的中医护理措施的随机对照试验,检索时限均为建库至2023年5月30日。经过文献筛选、质量评价、信息提取后,使用STATA 17.0软件和ADDIS 1.16.6软件进行网状Meta分析。结果:共纳入20篇文献,涉及11种中医护理干预措施,包括1 939例乳腺癌化疗病人。网状Meta分析结果显示,5种单一中医护理干预中,吸入芳香疗法缓解乳腺癌化疗病人化疗所致恶心呕吐(chemotherapy-induced nausea and vomiting, CINV)的效果最佳,有效控制率为93.2%;6种联合中医护理措施中,穴位贴敷联合情志护理效果最佳,有效控制率为92.9%。结论:当前证据表明,吸入芳香疗法以及穴位贴敷联合情志护理可较好地改善乳腺癌化疗病人恶心呕吐状况,可优先考虑应用。

关键词：乳腺癌化疗中医护理恶心呕吐网状Meta分析

Innate and adaptive immune abnormalities underlying autoimmune diseases:the genetic connections

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Science China(Life Sciences) 2023年第7期66卷 1482-1517页

作者： xinxin Chi Miaozhen Huang Hailin tu Bin Zhang xin Lin Huji Xu Chen Dong Xiaoyu Hu Institute for Immunology&School of Medicine Tsinghua UniversityBeijing 100084China Department of Rheumatology and Immunology Shanghai Changzheng HospitalThe Second Military Medical UniversityShanghai 200433China Peking-Tsinghua Center for Life Sciences Tsinghua UniversityBeijing100084China Shanghai Immune Therapy Institute Shanghai Jiaotong University School of Medicine-affiliated Renji HospitalShanghai 200127China

With the exception of an extremely small number of cases caused by single gene mutations,most autoimmune diseases result from the complex interplay between environmental and genetic *** a nutshell,etiology of the common autoimmune disorders is unknown in spite of progress elucidating certain effector cells and molecules responsible for pathologies associated with inflammatory and tissue *** recent years,population genetics approaches have greatly enriched our knowledge regarding genetic susceptibility of autoimmunity,providing us with a window of opportunities to comprehensively re-examine autoimmunity-associated genes and possible *** this review,we aim to discuss etiology and pathogenesis of common autoimmune disorders from the perspective of human *** overview of the genetic basis of autoimmunity is followed by3 chapters detailing susceptibility genes involved in innate immunity,adaptive immunity and inflammatory cell death processes *** such attempts,we hope to expand the scope of thinking and bring attention to lesser appreciated molecules and pathways as important contributors of autoimmunity beyond the‘usual suspects’of a limited subset of validated therapeutic targets.

关键词： autoimmune diseases etiology pathogenesis innate immunity adaptive immunity

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红河干热河谷特色小流域径流分析

人民珠江 2024年第S1期45卷 145-150,155页

作者：杨光伟屠田霖翟鑫金芸朱妍妍红河州水利水电工程地质勘察咨询规划研究院云南蒙自661100 广东中灏勘察设计咨询有限公司云南分公司云南蒙自661100

红河谷地处低纬度亚热带高原型湿润季风气候区,是云南省三大热区河谷经济带之一,热区资源独特。选择红河干热河谷范围内的南昏河特色小流域进行径流分析,通过分析,计算出干热河谷区特色小流域南昏河年径流量,为合理利用小流域水资源量... 详细信息

红河谷地处低纬度亚热带高原型湿润季风气候区,是云南省三大热区河谷经济带之一,热区资源独特。选择红河干热河谷范围内的南昏河特色小流域进行径流分析,通过分析,计算出干热河谷区特色小流域南昏河年径流量,为合理利用小流域水资源量提出建议。选择俄垤水文站作为本次径流计算的参证站,其水文年年径流资料系列具有可靠性、一致性、代表性,再确定水文站统计参数,经检查俄垤水文站年径流量统计参数确定是合理的。结果显示,流域河源降水量大,产水模数大,水资源丰富,随着往河道下游,降水减少,产水模数减少。针对此类问题,应加强水源保护,积极兴建水源工程,坚持高水高用,合理利用流域水资源,利用新技术、新工艺合理利用流域水资源,以此来全面改善小流域水资源利用率。

关键词：水文分析径流量干热河谷