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玉米收割机调度系统的设计与实现

农机化研究 2025年第4期47卷 137-140,150页

作者：王政王东朱学卫西北农林科技大学机械与电子工程学院陕西杨凌712100 农业农村部农业物联网重点实验室陕西杨凌712100

针对玉米收获期间收割机供求信息滞后、资源配置不合理的问题,基于MVC编程模式和WEB设计规范,引入B/S架构和微信小程序技术,搭建玉米收割机调度系统进行客户订单管理。采用人工鱼群算法规划玉米收割机调度路线,农机手按照微信小程序中... 详细信息

针对玉米收获期间收割机供求信息滞后、资源配置不合理的问题,基于MVC编程模式和WEB设计规范,引入B/S架构和微信小程序技术,搭建玉米收割机调度系统进行客户订单管理。采用人工鱼群算法规划玉米收割机调度路线,农机手按照微信小程序中的调度路线完成客户订单,从而实现玉米收割机调度系统的智能化管理,提高了玉米收割机的利用效率和作业效益。

关键词：玉米收割机 B/S架构调度系统 MVC WEB

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On maximal non-selfadjoint reflexive algebras associated with a double triangle lattice

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Science China Mathematics 2015年第11期58卷 2373-2386页

作者： dong AiJu WANG dong School of Mathematics and Computer Engineering Xi'an University of Arts and Science Academy of Mathematics and Systems Science Chinese Academy of Sciences Department of Mathematics and Statistics University of New Hampshire

We show that the reflexive algebra Alg(L) given by a double triangle lattice L in a finite factor M(with L" = M) is maximal non-selfadjoint in the class of all weak operator closed subalgebras with the same diagonal subalgebra Alg(L) ∩ Alg(L)^+.Our method can be used to prove similar results in finite-dimensional matrix *** a consequence,we give a new proof to the main theorem by Hou and Zhang(2012).

关键词： Kadison-Singer algebra Kadison-Singer lattice reflexive algebra double triangle lattice factorof type II1

Changes of Precipitation Infiltration Recharge in the Circumstances of Coal Mining Subsidence in the Shen-dong Coal Field,China

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 993-1003页

作者： ZHANG Fawang SONG Yaxin ZHAO Hongmei HAN Zhantao WANG dong Institute of Hydrogeology and Environmental Geology CAGS Institute of Karst Geology CAGS/Karst Dynamics LaboratoryMinistry of Land and Resources Non-ferrous Metal Geological Survey Center

Coal mining subsidence is a universal environmental-geological problem in mining areas. By selecting the Shen-dong coal mining subsidence area as the research field, this paper studies the changes in precipitation infiltration recharge in the circumstances of coal mining subsidence by means of field geological investigation and laboratory simulation experiments, which is expected to provide a scientific basis for eco-environmental restoration in the mining area. The results indicate that at the unstable stage of subsidence, three types of subsidence in the Shen-dong mining area have positive effects on the precipitation infiltration recharge, and the type of full-thickness bedrock subsidence has the greatest influence. In the stable stage of subsidence, the precipitation infiltration process after long- term drought and the moisture migration in the aeration zone undergo three different stages： evaporation-infiltration before precipitation, infiltration-upward infiltration-infiltration during precipitation and evaporation-infiltration after precipitation. During a heavy rainfall infiltration process, the wetting front movement in fine sand, coarse sand and dualistic structure of fine-coarse sand consists of two stages： the stage of wetting front movement during precipitation, in which the wetting front movement distance has linear relationship with the depth, and the stage of wetting front movement after precipitation, in which the wetting front movement distance has the power function relationship with the depth. The wetting front movement velocity is influenced by the rainfall amount and the lithology in the aeration zone. However, as the depth increases, the movement velocity will decay exponentially.

关键词： precipitation infiltration simulation coal mining subsidence Shen-dong mining area

Application of Transformed Two-Stage Network DEA to Strategic Design of Biofuel Supply Chain Network

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Journal of Systems Science and Systems Engineering 2023年第2期32卷 129-151页

作者： Jae-dong Hong Industrial Engineering Program South Carolina State UniversityOrangeburgSCUSA

This paper proposes an innovative procedure for designing efficient biomass-biofuel logistics networks(BBLNs).This procedure is based on the two-stage network data envelopment analysis(TSN-DEA)models that have been developed to provide specific process guidance for the managers to improve the efficiency of the decision-making unit(DMU)with the TSN *** crucial issue of the TSN-DEA is that the overall efficiency score depends on the DMUs under ***,the rankings for the DMUs generated by the TSN-DEA model are *** a result,the TSN-DEA-based ranking methods are *** TSN-DEA’s inconsistency frequently makes it difficult for decision-makers to select the top-rated *** develop the transformed TSN(T-TSN)DEA method by applying the multi-criteria DEA model to overcome this *** proposed method transforms the DMUs with any number of inputs,intermediate measures,and outputs in the TSN process,through the multi-objective programming model with a minimax objective approach,into the DMUs with two inputs and one output in the single-stage network(SSN)***,the well-known DEA methods for the SSN,such as the cross-efficiency and super-efficiency DEA methods,can be applied to evaluate and rank the transformed DMUs more *** exhibit the applicability of the proposed approach for the BBLN design problem.A case study of South Carolina in the USA demonstrates that the proposed method performs well in identifying efficient BBLN schemes more consistently than the traditional TSN-DEA.

关键词： Biomass-biofuel logistics network two-stage network data envelopment analysis efficiency score decision-making unit multiple criteria

Application of Integrated Multiple Criteria Data Envelopment Analysis to Humanitarian Logistics Network Design

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Journal of Systems Science and Systems Engineering 2020年第6期29卷 709-729页

作者： Jae-dong Hong Industrial Engineering Program South Carolina State UniversityOrangeburgSCUSA

This paper considers a humanitarian logistics network(HTLN)design problem,including the emergency relief facilities(ERFs)location-allocation decision for the efficient distribution of emergency supplies from the ERFs to the affected areas.A goal programming(GP)approach is applied to consider the multiple objectives *** the GP model with a given weight assigned to each goal yields a single HTLN scheme,so there will be various schemes available by solving the GP with multiple values of the *** evaluating these schemes and identifying the most efficient one,we apply the data envelopment analysis(DEA)methods considering each scheme as a decision-making unit(DMU).Since the classical DEA(C-DEA)intrinsically aims to identify efficient DMUs and the efficient frontier,the use of C-DEA may not lead to a full ranking in many *** are several independent evaluation approaches to increasing discriminating *** them,this study integrates the multiple criteria DEA(MC-DEA)with the following three DEA methods,(i)stratification DEA(S^DEA),(ii)cross-efficiency DEA(CE-DEA),and(iii)super-efficiency DEA(SE-DEA),to make the most use of each method's *** a case study of designing the HTLN system for South Carolina,the procedure of implementing the integrated multiple criteria DEA(IMC-DEA)method is *** is observed that the IMCDEA method performs well in terms of designing the HTLN system and would help the decision-makers consider more efficient options and make a final decision.

关键词： Humanitarian logistics network goal programming decision-making unit data envelopment analysis(DEA) stratification DEA cross efficiency DEA super-efficiency DEA multiple-criteria DEA

基于知识图谱可视化的三山五园学术领域知识分析

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北京联合大学学报 2025年第1期39卷 53-61页

作者：洪文董焱北京联合大学图书馆北京100101 北京联合大学应用文理学院北京100191

三山五园学术研究是北京文化特征与文脉传承研究的重要学术领域,自三山五园入选国家文物保护利用示范区以来,其研究深度和广度都得到了显著提升。利用知识图谱,在深入分析与解读三山五园学术研究现状的基础上,系统梳理并展示了领域研究... 详细信息

三山五园学术研究是北京文化特征与文脉传承研究的重要学术领域,自三山五园入选国家文物保护利用示范区以来,其研究深度和广度都得到了显著提升。利用知识图谱,在深入分析与解读三山五园学术研究现状的基础上,系统梳理并展示了领域研究的整体框架和脉络,明确揭示了研究的主要方向、热点及发展趋势,评估了研究者在该领域的学术水平和影响力,为推动三山五园的保护和利用提供了有力支持,也为领域学术研究向更深层次发展提供了参考依据。

关键词：三山五园知识图谱领域知识可视化分析

A Gradient Descent Method for Estimating the Markov Chain Choice Model

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Journal of the Operations Research Society of China 2023年第2期11卷 371-381页

作者： Lei Fu dong-dong Ge School of Information Management and Engineering Shanghai University of Finance and EconomicsShanghai 200433China

In this paper,we propose a gradient descent method to estimate the parameters in a Markov chain choice ***,we derive closed-form formula for the gradient of the log-likelihood function and show the convergence of the *** experiments verify the efficiency of our approach by comparing with the expectation-maximization *** show that the similar result can be extended to a more general case that one does not have observation of the no-purchase data.

关键词： Markov chain choice model Parameter estimation Gradient descent method

基于摆锤法的成熟期油菜角果炸荚因素试验分析

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农机化研究 2025年第4期47卷 180-185页

作者：李港张敏魏德欣江东农业农村部南京农业机械化研究所南京210014

为了降低油菜联合收割机拨禾轮拨禾过程对角果打击造成的炸荚损失,采用摆锤法模拟拨禾轮拨禾对油菜角果冲击过程,对影响拨禾过程中的炸荚因素进行测试分析,并对角果损伤变化形式及过程进行分析。试验结果表明:摆锤冲击速度3.5 m/s、夹... 详细信息

为了降低油菜联合收割机拨禾轮拨禾过程对角果打击造成的炸荚损失,采用摆锤法模拟拨禾轮拨禾对油菜角果冲击过程,对影响拨禾过程中的炸荚因素进行测试分析,并对角果损伤变化形式及过程进行分析。试验结果表明:摆锤冲击速度3.5 m/s、夹持果柄位置距连接点2 mm是区分角果抗打击炸荚的最优参数;油菜角果炸荚不仅与冲击速度、果柄夹持位置有关,而且与油菜品种、冲击件材料类型、角果受力面、含水率、角果在植株上的分布位置等都有关系;冲击速度不超过1.5 m/s时,角果损伤以角果果柄发生塑性变形为主;冲击速度为2.5~4.5 m/s时,角果损伤以果皮破裂分离、果柄弹性变形为主。研究结果可为油菜拨禾轮设计和工作参数选择提供参考。

关键词：油菜角果炸荚率冲击拨禾轮摆锤法

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负载槲皮素的羧甲基壳聚糖水凝胶促进糖尿病大鼠创面愈合

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中国组织工程研究 2025年第4期29卷 692-699页

作者：董美林都海宇刘源连云港市第二人民医院(南京医科大学康达学院附属医院)烧伤整形科江苏省连云港市222000

背景:槲皮素具有抗炎、抗癌、抗氧化、抗衰老、抗抑郁等药理作用,具有极高的药用价值。槲皮素可以促进正常大鼠创面的愈合,但是以槲皮素为主要成分的药物研发较少,限制了其在临床的广泛应用。目的:以水凝胶材料负载槲皮素,探讨槲皮素-... 详细信息

背景:槲皮素具有抗炎、抗癌、抗氧化、抗衰老、抗抑郁等药理作用,具有极高的药用价值。槲皮素可以促进正常大鼠创面的愈合,但是以槲皮素为主要成分的药物研发较少,限制了其在临床的广泛应用。目的:以水凝胶材料负载槲皮素,探讨槲皮素-羧甲基壳聚糖水凝胶在糖尿病大鼠创面中的应用效果。方法:①分别制备羧甲基壳聚糖水凝胶与槲皮素-羧甲基壳聚糖水凝胶,表征水凝胶的微观形貌、体外释药性能。②细胞实验:将小鼠L929成纤维细胞分4组培养,空白对照组常规培养,纯水凝胶组、药物组、载药水凝胶组分别加入羧甲基壳聚糖水凝胶、槲皮素溶液与槲皮素-羧甲基壳聚糖水凝胶,检测细胞增殖与迁移能力。③动物实验:取80只SD大鼠建立糖尿病模型,造模成功后在大鼠背部制作直径2 cm的全层皮肤缺损创面,随机分4组干预,空白对照组、纯水凝胶组、药物组、载药水凝胶组创面分别注射生理盐水、羧甲基壳聚糖水凝胶、槲皮素溶液、槲皮素-羧甲基壳聚糖水凝胶,每组20只,无菌纱布包扎固定。术后观察创面愈合情况、创面病理形态、炎症因子表达及血管生成情况。结果与结论:①扫描电镜下可见两种水凝胶的微观形貌相似,均呈疏松多孔的网络结构,并且槲皮素-羧甲基壳聚糖水凝胶具有良好的体外释药性能。②与空白对照组比较,其他3组细胞增殖与迁移率升高(P<0.05);载药水凝胶组细胞增殖与迁移率高于纯水凝胶组、药物组(P<0.05)。③载药水凝胶组大鼠术后5,11 d的创面愈合率高于其他3组;载药水凝胶组、纯水凝胶组、药物组大鼠术后18 d的创面愈合率基本达到100%,均高于空白对照组(P<0.05)。苏木精-伊红染色显示,载药水凝胶组大鼠术后18 d创面可见完整的皮肤与皮肤附属器,空白对照组、纯水凝胶组、药物组大鼠术后25 d创面可见完整的皮肤与皮肤附属器。载药水凝胶组大鼠创面术后5,11,18 d的创面肿瘤坏死因子α、白细胞介素6水平均低于空白对照组(P<0.05),术后11,18 d的创面转化生长因子β1水平低于空白对照组(P<0.05)。载药水凝胶组大鼠术后11,18 d的CD31、血管内皮生长因子αmRNA表达量均高于其他3组(P<0.05)。④结果表明,槲皮素-羧甲基壳聚糖水凝胶中的槲皮素可发挥调节炎症反应、促进血管新生的作用,可通过促进成纤维细胞的增殖与迁移,促进糖尿病大鼠创面的愈合。

关键词：创面愈合槲皮素敷料水凝胶糖尿病创面羧甲基壳聚糖皮肤创面成纤维细胞