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The Innovation 2024年第1期5卷 13-14页

作者： Guanglei Yang Donglan Zha Dongqin Cao guoxing zhang School of Management Lanzhou UniversityLanzhou 730000China College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Economics Lanzhou UniversityLanzhou 730000China

The concept of energy transition was initially proposed by the German Academy of Sciences in 1980,advocating for the abandonment of nuclear power and oil in response to the energy *** that time,insufficient attention was given to the energy *** 1980 to 1992,the global economy experienced significant growth,with the gross domestic product doubling from 11.34 trillion dollars to 25.41 trillion dollars(data from the World Bank).

关键词： Sustainable dollar transition

Influence of cerium and yttrium addition on strength and electrical conductivity of pure aluminum alloys

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Journal of Rare Earths 2024年第3期42卷 600-611,I0006页

作者： Guojian Lin Lu Li Zhengwei Guo Xianjun Jia Xiao Wang Zhentao Yuan guoxing zhang Yun Zhan Quan Shan Zulai Li Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming650093China Research Center for Analysis and Measurement Kunming University of Science and TechnologyKunming650093China City College Kunming University of Science and TechnologyKunming650051China

To develop pure aluminum alloys with high conductivity and strength, Al-0.2Ce and Al-0.2Ce-0.1Y alloys were prepared by rolling and annealing processes in this study. The effects of trace rare earth elements on the strength and electrical conductivity of the pure aluminum alloys were investigated. It is revealed that the addition of Ce and Y to pure aluminum can effectively enhance the strength and electrical conductivity of the alloys. In Al-0.2Ce, the addition of Ce can effectively refine the grain size of a-Al, with an average grain size of 90.68 μm in the as-cast state. The grain size of the alloy is further reduced to 87.55 μm by the simultaneous addition of Y. The synergistic addition of Ce and Y changes the properties of the alloy. The addition of Ce and Y also produces the Al_(11)Ce_(3) and Al_(3)Y second phases, which have coherent relationship with a-Al. The two-dimensional mismatch degree was calculated to be only 4.43%and 0.85%, respectively, which can provide a certain amount of nucleation substrate for a-Al in the incubation stage. The interfacial match between the L1_(2)structure of Al_(3)Y and a-Al was calculated using first-principles simulations. The results indicate that Al_(3)Y has a strong bonding effect with a-Al. Nanoscale second phases at grain boundaries can be effective in reducing resistivity due to dislocation *** second phases with better matching interfaces to the substrate have no positive effect on the scattering motion of electrons.

关键词： Pure aluminum Rare earths Impurity purification First-principles calculations Strength-conductivity contradiction

基于特征优化和BSO-RBF神经网络的NO_(x)浓度预测模型

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计量学报 2024年第2期45卷 285-293页

作者：张国兴王世朋国能宁夏鸳鸯湖第一发电有限公司宁夏银川750011

针对火力发电厂中燃烧系统运行工况复杂、迟延较大,导致选择性催化还原(SCR)烟气脱硝系统中入口NOx质量浓度难以准确测量的问题,提出了一种基于特征优化和径向基函数(radial basis function,RBF)神经网络的预测模型。将经过特征优化后... 详细信息

针对火力发电厂中燃烧系统运行工况复杂、迟延较大,导致选择性催化还原(SCR)烟气脱硝系统中入口NOx质量浓度难以准确测量的问题,提出了一种基于特征优化和径向基函数(radial basis function,RBF)神经网络的预测模型。将经过特征优化后的变量作为模型的最终输入变量,并使用天牛群优化(beetle swarm optimization,BSO)算法对神经网络超参数进行寻优,建立入口NO_(x)浓度预测模型。结果表明,经过特征优化后的变量放入模型后,其预测结果要优于原始变量:经特征优化及时延处理后的模型其S_(RMSE)减少了44.5%,R^(2)增加了2.3%,经过BSO确定后的神经网络超参数使得模型精度也得到了进一步提升。

关键词： NO_(x)浓度预测特征优化天牛群优化算法径向基函数神经网络

中国工业氮氧化物排放和强度的结构分解分析及其减排策略

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中国管理科学 2024年第7期32卷 311-323页

作者：张国兴韩继磊 Su Bin 兰州大学管理学院甘肃兰州730000 新加坡国立大学能源研究所新加坡119620 新加坡国立大学工业系统工程与管理系新加坡117576

经济增长给生态环境可持续发展带来了挑战。氮氧化物污染已成为中国社会经济发展的严峻挑战,尤其是工业源氮氧化物污染。现阶段,政策制定者与学者常使用氮氧化物排放总量的变化来衡量环境绩效,少有研究使用结构分解分析方法系统地追踪... 详细信息

经济增长给生态环境可持续发展带来了挑战。氮氧化物污染已成为中国社会经济发展的严峻挑战,尤其是工业源氮氧化物污染。现阶段,政策制定者与学者常使用氮氧化物排放总量的变化来衡量环境绩效,少有研究使用结构分解分析方法系统地追踪氮氧化物排放/强度变化的驱动因素。本文在投入产出框架下,对中国工业氮氧化物排放/强度进行加性/乘性结构分解,分别从整体层面、最终需求层面和部门层面探究其驱动因素。结果表明,最终需求层面隐含排放/强度均明显降低,投资和居民消费是氮氧化物排放/强度的主要需求驱动力。排放强度效应是氮氧化物排放/强度下降的主要驱动因素(91.69%),最终需求效应是氮氧化物排放/强度降低的阻碍因素。在部门层面,隐含排放主要由建筑业驱动(49.26%),经济增长主要由服务业驱动(44.90%);“电力、热力生产和供应业”“非金属矿物制品业”和“黑色金属冶炼及压延加工业”排放效率的提高是总排放强度下降的主要驱动因素。基于以上结论,本文讨论了实现经济发展与环境保护双重目标的减排策略,为未来氮氧化物污染的治理提供了理论依据。

关键词：投入产出分析氮氧化物排放结构分解分析总隐含强度减缓策略

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风积沙再生骨料自密实混凝土抗渗透性能研究

广东建材 2024年第1期40卷 14-17页

作者：张国星新疆大学建筑工程学院

对风积沙及再生骨料对自密实混凝土的抗渗透性能影响规律进行了研究,使用风积沙取代率为20%、40%、60%,再生骨料取代率为25%、50%、75%制备自密实混凝土,对其工作性能、抗压强度及抗渗性能进行试验研究,结果表明:风积沙掺入可以填充再... 详细信息

对风积沙及再生骨料对自密实混凝土的抗渗透性能影响规律进行了研究,使用风积沙取代率为20%、40%、60%,再生骨料取代率为25%、50%、75%制备自密实混凝土,对其工作性能、抗压强度及抗渗性能进行试验研究,结果表明:风积沙掺入可以填充再生骨料与混凝土中微小孔隙,同时再生骨料具有一定活性,可以帮助混凝土进一步水化,两者适量掺入可使自密实混凝土更加密实,抗渗透性能提高。

关键词：风积沙再生骨料自密实混凝土抗渗透性能

个体激励型自愿减排机制能否提升地区碳排放绩效?

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中国人口·资源与环境 2024年第6期34卷 33-44页

作者：刘迪一刘俊腾张国兴杜慧滨陈张蕾南开大学周恩来政府管理学院天津300350 兰州大学管理学院甘肃兰州730000 天津大学管理与经济学部/天津大学国家储能技术产教融合创新平台天津300350

作为一种自愿性个人碳交易机制,碳普惠旨在通过“谁减排谁受益”的激励模式促进个体主动践行低碳行为,是碳排放交易机制向个体层面的延伸和拓展,评估这一政策的碳排放绩效对于挖掘社会个体减排潜力、丰富环境政策工具体系具有重要意义... 详细信息

作为一种自愿性个人碳交易机制,碳普惠旨在通过“谁减排谁受益”的激励模式促进个体主动践行低碳行为,是碳排放交易机制向个体层面的延伸和拓展,评估这一政策的碳排放绩效对于挖掘社会个体减排潜力、丰富环境政策工具体系具有重要意义。该研究以2015年广东省实施碳普惠政策为准自然实验,利用合成控制法和2005—2021年省级面板数据,实证评估了碳普惠在提升地区碳排放绩效方面取得的实际效果,并进一步探究了政策效应发生的内在机制。研究结果表明:碳普惠政策的实施促进了地区碳排放总量、人均碳排放和碳排放强度的下降,2015—2021年,政策干预使得广东省碳排放总量平均降低4 094万t,人均碳排放量降低0.294 t,碳排放强度降低0.312 t/万元,且该结论在进行安慰剂检验、排序检验和排除其他政策干扰的检验后依然成立。进一步的中介机制检验表明,碳普惠政策能通过促进公众绿色出行和降低用电量降低地区碳排放,但不能降低能源消耗。该研究揭示了兼具激励性和自愿性的个人碳交易机制在环境治理中的有效性,据此,提出以下政策建议:(1)未来需要重视社会个体在消费端的减排潜力,逐渐将个人碳交易机制纳入到碳减排治理中,鼓励地方政府因地制宜地应用和发展碳普惠;(2)在碳普惠的设计中,要完善低碳出行场景和低碳生活场景中的激励机制,提高公众参与减排的便利性;(3)注重碳普惠政策设计的应用性、激励性和持续性,开发科学的碳普惠量化核证方法学,构建涵盖社会公众和工业企业的全方位碳交易体系。

关键词：个人碳交易碳普惠碳排放绩效合成控制法

配体调控CsPbBr_(3)/Cs_(4)PbBr_(6)复合薄膜的合成、发光性能及白光LED应用

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发光学报 2024年第7期45卷 1077-1085页

作者：蒋东亮张国星朱兴华李源陈岩五邑大学应用物理与材料学院广东江门529000

全无机CsPbX_(3)(X=Cl,Br,I)钙钛矿纳米晶(PNCs)的合成通常需要高温条件和惰性气体的参与,严重阻碍了其实际应用。本文首先利用2-甲基咪唑配体调控再结晶的方法在室温下成功地制备出具有优异发光性能的双相CsPbBr_(3)/Cs_(4)PbBr_(6)PN... 详细信息

全无机CsPbX_(3)(X=Cl,Br,I)钙钛矿纳米晶(PNCs)的合成通常需要高温条件和惰性气体的参与,严重阻碍了其实际应用。本文首先利用2-甲基咪唑配体调控再结晶的方法在室温下成功地制备出具有优异发光性能的双相CsPbBr_(3)/Cs_(4)PbBr_(6)PNCs,然后与多种聚合物结合制备出纳米晶复合薄膜。通过X射线粉末衍射(XRD)、透射电子显微镜(TEM)和紫外-可见吸收光谱等测试,证明了聚合物中的双相钙钛矿结构,筛选出综合性能优异的CsPbBr_(3)/Cs_(4)PbBr_(6)@PDMS和CsPbBr_(3)/Cs_(4)PbBr_(6)@EVA复合薄膜,并进行了发光二极管(LED)器件封装。通过Cs4PbBr6 PNCs和聚合物的双重保护,CsPbBr_(3)/Cs_(4)PbBr_(6)@PDMS显示出超过80%的荧光量子产率(PLQY),CsPbBr_(3)/Cs_(4)PbBr_(6)@EVA的水稳定性和空气稳定性得到了显著提高。最后,将CsPbBr_(3)/Cs_(4)PbBr_(6)@EVA复合薄膜成功应用于白光LED器件,其CIE色度坐标为(0.331,0.332),具有标准白光发射。

关键词：配体调控 CsPbBr_(3)/Cs_(4)PbBr_(6) 复合薄膜白光LED器件

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Configuration Synthesis and Lightweight Networking of Deployable Mechanism Based on a Novel Pyramid Module

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Chinese Journal of Mechanical Engineering 2023年第4期36卷 294-310页

作者： Jinwei Guo Jianliang He guoxing zhang Yongsheng Zhao Yundou Xu School of Mechanical Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan UniversityQinhuangdao 066004China Key Laboratory of Advanced Forging and Stamping Technology and Science of Ministry of National Education Yanshan UniversityQinhuangdao 066004China

Deployable mechanism with preferable deployable performance,strong expansibility,and lightweight has attracted much attention because of their potential in aerospace.A basic deployable pyramid unit with good deployability and expandability is proposed to construct a sizeable deployable ***,the basic unit folding principle and expansion method is *** configuration synthesis method of adding constraint chains of spatial closed-loop mechanism is used to synthesize the basic ***,the degree of freedom of the basic unit is analyzed using the screw theory and the link dismantling ***,the three-dimensional models of the pyramid unit,expansion unit,and array unit are established,and the folding motion simulation analysis is carried *** on the number of components,weight reduction rate,and deployable rate,the performance characteristics of the three types of mechanisms are described in ***,prototypes of the pyramid unit,combination unit,and expansion unit are developed to verify further the correctness of the configuration synthesis based on the *** proposed deployable mechanism provides aference for the design and application of antennas with a large aperture,high deployable rate,and *** has a good application prospect in the aerospace field.

关键词： Pyramid unit Deployable mechanism Configuration synthesis Structural design Lightweight networking

A Novel Hybrid FA-Based LSSVR Learning Paradigm for Hydropower Consumption Forecasting

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Journal of Systems Science & Complexity 2015年第5期28卷 1080-1101页

作者： TANG Ling WANG Zishu LI Xinxie YU Lean zhang guoxing School of Economics and Management Beijing University of Chemical Technology School of Management Lanzhou University

Due to the nonlinearity and nonstationary of hydropower market data, a novel hybrid learning paradigm is proposed to predict hydropower consumption, by incorporating firefly algorithm(FA) into least square support vector regression(LSSVR), i.e., FA-based LSSVR model. In the novel model, the powerful and effective artificial intelligence(AI) technique, i.e., LSSVR, is employed to forecast hydropower consumption. Furthermore, a promising AI optimization tool, i.e., FA, is especially introduced to address the crucial but difficult task of parameters determination in LSSVR(e.g.,hyper and kernel function parameters). With the Chinese hydropower consumption as sample data,the empirical study has statistically confirmed the superiority of the novel FA-based LSSVR model to other benchmark models(including existing popular traditional econometric models, AI models and similar hybrid LSSVRs with other popular parameter searching tools), in terms of level and directional accuracy. The empirical results also imply that the hybrid FA-based LSSVR learning paradigm with powerful forecasting tool and parameters optimization method can be employed as an effective forecasting tool for not only hydropower consumption but also other complex data.

关键词： Artificial intelligence firefly algorithm hybrid model hydropower consumption least squares support vector regression time serie

Force Analysis of the Overconstrained Mechanisms Based on Equivalent Stiffness Considering Limb Axial Deformation

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 292-304页

作者： Jinwei Guo Yongsheng Zhao Bo Chen guoxing zhang Yundou Xu Jiantao Yao Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan UniversityQinhuangdao066004China Key Laboratory of Advanced Forging&Stamping Technology and Science of Ministry of National Education Yanshan UniversityQinhuangdao066004China

Overconstrained mechanism has the advantages of large bearing capacity and high motion reliability,but its force analysis is complex and difficult because the mechanism system contains *** the limb axial deformation,taking typical 2SS+P and 7-SS passive overconstrained mechanisms,2SPS+P and 7-SPS active overconstrained mechanisms,and 2SPS+P and 7-SPS passive-input overconstrained mechanisms as examples,a new force analysis method based on the idea of equivalent stiffness is *** equivalent stiffness matrix of passive overconstrained mechanism is derived by combining the force balance and deformation compatibility equations with consideration of axial elastic limb *** relationship between the constraint wrench magnitudes and the external force,limb stiffness is *** equivalent stiffness matrix of active overconstrained mechanism is derived by combining the force balance and displacement compatibility ***,the relationship between the magnitudes of the actuated wrenches and the external force,limb stiffness is *** with the equivalent stiffness of the passive overconstrained mechanism,an analytical relationship between the actuated forces of passive-input overconstrained mechanism and the output displacement,limb stiffness is ***,adaptability of the equivalent stiffness to overconstrained mechanisms is discussed,and the effect of the limb stiffness on overconstrained mechanisms force distribution is *** research results provide a theoretical reference for the design,research and practical application of overconstrained mechanism.

关键词： Active overconstrained Passive overconstrained Passive-input overconstrained Equivalent stiffness Force distribution