检索结果-南通市图书馆

改进麻雀算法优化Elman神经网络的短期电力负荷预测

在线全文

学校读者我要写书评

暂无评论

上海电机学院学报 2022年第4期25卷 221-227页

作者：邹定江刘天羽(指导) 王勉段震宇上海电机学院电气学院上海201306

针对埃尔曼(Elman)动态递归神经网络在短期电力负荷预测中容易陷入局部最优、收敛不稳定以及预测精度低的问题,提出了基于Logistic混沌映射初始化种群并加入随机游走扰动的麻雀搜索算法(SSA)优化Elman动态递归神经网络的预测方法。首先... 详细信息

针对埃尔曼(Elman)动态递归神经网络在短期电力负荷预测中容易陷入局部最优、收敛不稳定以及预测精度低的问题,提出了基于Logistic混沌映射初始化种群并加入随机游走扰动的麻雀搜索算法(SSA)优化Elman动态递归神经网络的预测方法。首先,为提高初始解的质量,根据Logistic混沌映射理论对麻雀种群进行初始化;其次,在麻雀搜索食物后,通过随机游走对最优麻雀进行位置扰动,提高其全局与局部搜索能力;最后,将改进麻雀搜索算法(ISSA)与Elman动态递归神经网络相结合,并通过Matlab进行真实数据仿真,对比分析了ISSA-Elman模型与其他模型的电力负荷预测结果。结果表明:本文方法误差更小,预测精度更高。

关键词： Elman神经网络负荷预测 Logistic混沌映射随机游走扰动麻雀搜索

在线全文

学校读者我要写书评

暂无评论

安徽省淮水北调工程水量应急调度预案分析

中国防汛抗旱 2022年第8期32卷 31-34页

作者：吴耀光宋正明汤帅段震宇安徽省怀洪新河河道管理局(安徽省淮水北调工程管理中心) 蚌埠233000

安徽省淮水北调工程是有效缓解皖北宿州、淮北两市水资源短缺现状,保障区域供水安全的调水工程,如遇特殊干旱年份发生严重枯水时,淮水北调水源区与受水区水资源供需矛盾将较为突出,因此有必要制定并实施淮水北调工程水量应急调度预案。... 详细信息

安徽省淮水北调工程是有效缓解皖北宿州、淮北两市水资源短缺现状,保障区域供水安全的调水工程,如遇特殊干旱年份发生严重枯水时,淮水北调水源区与受水区水资源供需矛盾将较为突出,因此有必要制定并实施淮水北调工程水量应急调度预案。通过对淮水北调工程水源区在干旱年份可利用水量及供需情况进行分析,并依托现有工程条件,提出了调度原则、预案启动条件、启动程序及节点工程控制条件、调水规模等预案框架和内容,为预案的编制提供依据。

关键词：淮水北调干旱年份水量调度应急预案安徽省

新疆中熟玉米自交系配合力分析和杂种优势群研究

在线全文

学校读者我要写书评

暂无评论

西北农业学报 2014年第3期23卷 31-35页

作者：桑志勤陈树宾段震宇王友德王婷郭斌李玉梅新疆农垦科学院作物研究所谷物品质与遗传改良兵团重点实验室新疆石河子832000

为了研究新疆中熟玉米自交系的配合力和杂种优势模式,以13份新选育中熟玉米自交系为试材,采用NCⅡ的遗传设计,以B73、MO17、黄早四、齐319、丹340为标准测验种,13个新选育的玉米自交系为被测系,测定并分析18份玉米自交系材料的配合力和... 详细信息

为了研究新疆中熟玉米自交系的配合力和杂种优势模式,以13份新选育中熟玉米自交系为试材,采用NCⅡ的遗传设计,以B73、MO17、黄早四、齐319、丹340为标准测验种,13个新选育的玉米自交系为被测系,测定并分析18份玉米自交系材料的配合力和杂种优势群。结果表明,18个自交系可分为5群,即兰卡斯特(MO17、TS31)、瑞德(B73、L4-6、X1)、四平头(黄早四、8504、108F和B2)、PB群(齐319、W313、L4-10)、旅大红骨(丹340、Q3012、L4-89、L4-20、X3、B1)。其中,TS31、108F、L4-89、L4-10的一般配合力较高,可以作为优良的亲本直接用于杂交种的选育。65个杂交组合中L4-10×丹340、L4-89×B73、108F×B73、W313×丹340等13个的杂种优势比较强。可见,新疆地区SS群与NSS群配置的组合杂种优势一般较强,所有的强优势组合的两亲本一般都具有较高的一般配合力,而且产量构成因子具有互补性。

关键词：玉米自交系配合力杂种优势群

Parameters identification of UCAV flight control system based on predator-prey particle swarm optimization

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2013年第1期56卷 121-132页

作者： duan HaiBin YU YaXiang ZHAO zhenyu Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical EngineeringBeihang University

With the improvement of the aircraft flight performance and development of computing science,uninhabited combat aerial vehicle(UCAV) could accomplish more complex *** this also put forward stricter requirements for the flight control system,which are the crucial issues of the whole UCAV system *** paper proposes a novel UCAV flight controller parameters identification method,which is based on predator-prey particle swarm optimization(PSO) algorithm.A series of comparative experimental results verify the feasibility and effectiveness of our proposed approach in this paper,and a predator-prey PSO-based software platform for UCAV controller design is also developed.

关键词： uninhabited combat aerial vehicle(UCAV) particle swarm optimization(PSO) parameters identification predator-prey

Analysis,Prediction and Process Optimization Concerning Ammonium Chloride Corrosion in Ebullated-Bed Hydrogenation Unit for Treating Residual Oil

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China Petroleum Processing & Petrochemical Technology 2020年第4期22卷 108-116页

作者： Bao zhenyu Wang Ning Zhang Hongfei duan Yongfeng Yu Fengchang R&D Center of Luoyang Technology SINOPEC Engineering(Group)Co.LTD.Luoyang 471003

Ammonium chloride corrosion in the reactor effluent system remains to be a barrier for the safe operation of the ebullated-bed hydrogenation unit as impurity content is higher compared with that of the ordinary hydrogenation *** this research,a Sinopec envisaged case study was conducted on feed oil containing 2.92μg/g of Cl and 0.38%of N,because the impurity content of feed oil was representative in residue *** deposition patterns in heat exchangers were investigated by changing process variables,and then water wash strategy was optimized in view of the relative humidity to obtain a minimum water flowrate,and finally the process optimization suggestions concerning the operation of heat exchangers were *** show that with the measured content of nitrogen and chlorine in the feed,the NH4Cl deposition temperature of hot high-pressure vapor and hot low-pressure vapor was 223.4℃ and 173.7℃,respectively,and the minimum water wash flowrate for heat exchangers of hot high-pressure vapor with mixed hydrogen and hot low-pressure vapor with cold low-pressure oil was 38.0 t/h and 5.4 t/h,*** wash should be carried out intermittently upstream of the heat exchanger tube *** consideration of energy consumption,it is recommended to reduce the tube pass outlet temperature of the above heat exchangers to 240℃ and 190℃,respectively.

关键词： ebullated-bed hydrogenation corrosion ammonium salt water wash deposition temperature

Magneto-electric integrated design strategy of NiCo@C composites for synergistic absorption and conversion in mid-high frequency microwaves

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 2205-2215页

作者： Yijie Liu Jintang Zhou Xiaoxuan He Lvtong duan Yucheng Wang zhenyu Cheng Zhengjun Yao College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211100China Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics) Ministry of Industry and Information TechnologyNanjing 211100China

Achieving synergistic absorption of electromagnetic waves(EMWs)in the mid-high frequency and absorption band conversion is an urgent ***,the present solution is usually a straightforward mixture of magnetic component-carbon ***,we optimize the magnetic properties and electrical relaxation response from a chemical synthesis *** integrated design,the contents of carbon components and multi-dimensional morphology are controlled by retaining strong magnetic *** morphology design and the construction of heterogeneous interfaces will boost the intense response of charge in the surrounding to enhance the polarization *** multi-dimensional structure and electromagnetic(EM)properties of the sample after optimized engineering have an extremely powerful absorption conversion effect on EMW ***@C particles ultimately achieve synergistic absorption effects at low thickness(d<3.5 mm)at middle frequencies(6–10 GHz)and high frequencies(10.5–18 GHz).Our work establishes a correlation mechanism between the physical and chemical properties of materials and EM *** also provides insight into the synergistic absorption of EMWs in the mid-high frequency and absorption band conversion strategies.

关键词： micro-nano composites NiCo@C hollow structure mid-high frequency absorption

Electrocatalytic C0_(2) Reduction with Re-Based Spiro Bipyridine Complexes: Effects of the Local Proton in the Second Coordination Sphere

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2021年第5期39卷 1281-1287页

作者： Yong Yang Ziyun Zhang zhenyu Zhang Chao Tang Xiaoyong Chang Lele duan Department of Chemistry Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhenGuangdong 518055China

We report herein a Re-based tricarbonyl catalyst[fac-Re(L1)(CO)_(3)Cl](Re1)bearing a spiro center and a phenol group as a local proton source in the second coordination *** to the large steric spiro group,dimerization of one-electron reduced species was completely eliminated,improving the stability of ***,the phenol group in the second coordination sphere improves the formation of an H-bonding chain that promotes the protonation of C0_(2) reduction intermediates,boosting the electrocatalytic C0_(2) reduction activity of *** studies reveal that the doubly reduced complex Re1b is active for C0_(2) addition.

关键词： Rhenium Homogeneous catalysis Second coordination sphere Electrochemistry CO_(2)reduction

甜糯型鲜食玉米品种新糯玉15号选育及栽培技术

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

耕作与栽培 2023年第1期43卷 129-132页

作者：张力桑志勤王友德段震宇陈树宾徐灿新疆农垦科学院作物研究所新疆石河子832000 谷物品质与遗传改良兵团重点实验室新疆石河子832000

新糯玉15号是以自选白糯玉米自交系F 304(wxwx)为母本、自选白甜糯玉米自交系Z白5(sh 2sh 2wxwx)为父本,杂交组配育成的新型甜糯型玉米单交种,该品种果穗美观,粘中带甜,果皮较薄,口感好、风味佳。本文介绍了甜糯型鲜食玉米特点和新疆鲜... 详细信息

新糯玉15号是以自选白糯玉米自交系F 304(wxwx)为母本、自选白甜糯玉米自交系Z白5(sh 2sh 2wxwx)为父本,杂交组配育成的新型甜糯型玉米单交种,该品种果穗美观,粘中带甜,果皮较薄,口感好、风味佳。本文介绍了甜糯型鲜食玉米特点和新疆鲜食玉米应用现状,及新糯玉15号的选育过程、特征特性、产量表现和栽培技术要点。

关键词：新糯玉15号选育双隐性甜糯玉米品种

Predictive models for characterizing the atomization process in pyrolysis of methyl ricinoleate

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2020年第4期28卷 1023-1028页

作者： Xiaoning Mao Qinglong Xie Ying duan Shangzhi Yu Xiaojiang Liang zhenyu Wu Meizhen Lu Yong Nie Biodiesel Laboratory of China Petroleum and Chemical Industry Federation Zhejiang Provincial Key Laboratory of Biofueland College of Chemical EngineeringZhejiang University of TechnologyHangzhou 310014China

Pyrolysis of methyl ricinoleate(MR)can produce undecylenic acid methyl ester and heptanal which are important *** feeding favors the heat exchange in the pyrolysis process and hence increases the product ***,predictive models to characterize the atomization process were *** effect of spray distance on Sauter mean diameter(SMD)of atomized MR droplets was examined,with the optimal spray distance to be 40-50 *** mainly affected the physical properties of feedstock,with smaller droplet size obtained at increasing *** addition,pressure had significant influence on SMD and higher pressure resulted in smaller atomized ***,a model for SMD prediction,combining temperature,pressure,spray distance,and structural parameters of nozzle,was developed through dimensionless *** results showed that SMD was a power function of Reynolds number(Re),Ohnesorge number(Oh),and the ratio of spray distance to diameter of swirl chamber in the nozzle(H/dsc),with the exponents of-1.6618,-1.3205 and 0.1038,*** experimental measured SMD was in good agreement with the calculated values,with the error within±15%.Moreover,the droplet size distribution was studied by establishing the relationship between the standard deviation of droplet size and *** study could provide reference to the regulation and optimization of the atomization process in MR pyrolysis.

关键词： Atomization Methyl ricinoleate pyrolysis Predictive model Sauter mean diameter(SMD) Spray distance