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产业结构视角下区域债务化解展望

债券 2024年第8期 42-45页

作者：丁继平陈婷杜晗联合资信

在我国城镇化和工业化持续推进的过程中,城投企业债务规模快速增长,中央及地方政府对城投债务规模的持续增长高度重视,如何妥善化解地方政府债务成为重要议题。本文从城投企业债务化解的中长期视角出发,以产业结构作为分析重点,通过分... 详细信息

在我国城镇化和工业化持续推进的过程中,城投企业债务规模快速增长,中央及地方政府对城投债务规模的持续增长高度重视,如何妥善化解地方政府债务成为重要议题。本文从城投企业债务化解的中长期视角出发,以产业结构作为分析重点,通过分析我国东西部地区在不同特征的产业结构下,在区域税源结构、税源稳定性和税源增长潜力等方面的差异,并结合不同区域未来发展定位和动力,对我国东西部地区城投债务化解路径进行展望。

关键词：产业结构区域债务债务化解

Molecular bases of rice grain size and quality for optimized productivity

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Science Bulletin 2023年第3期68卷 314-350,M0004页

作者： Deyong Ren Chaoqing ding Qian Qian State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China

The accomplishment of further optimization of crop productivity in grain yield and quality is a great *** size is one of the crucial determinants of rice yield and quality;all of these traits are typical quantitative traits controlled by multiple *** advances have revealed several molecular and developmental pathways that govern these traits of agronomical *** review provides a comprehensive summary of these pathways,including those mediated by G-protein,the ubiquitin–proteasome system,mitogen-activated protein kinase,phytohormone,transcriptional regulators,and storage product biosynthesis and *** also generalize the excellent precedents for rice variety improvement of grain size and quality,which utilize newly developed gene editing and conventional gene pyramiding *** addition,we discuss the rational and accurate breeding strategies,with the aim of better applying molecular design to breed high-yield and superior-quality varieties.

关键词： Rice Grain size Grain quality Genetic control Molecular networks Variety improvement

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基于数智化的物流管理专业教学改革研究

物流科技 2024年第11期47卷 182-184页

作者：张林凤丁希祥重庆人文科技学院重庆401524

文章旨在探讨基于数智化的物流管理专业教学改革。数智化时代为教育带来了新机遇和挑战,阐述了课程内容优化、教学方法创新和教学资源数字化共享等改革策略。同时,强调智能化教学工具的应用和与企业合作的实际项目实践在教学中的重要性... 详细信息

文章旨在探讨基于数智化的物流管理专业教学改革。数智化时代为教育带来了新机遇和挑战,阐述了课程内容优化、教学方法创新和教学资源数字化共享等改革策略。同时,强调智能化教学工具的应用和与企业合作的实际项目实践在教学中的重要性。然后,分析了教学改革面临的技术应用挑战与模式变革难点,并展望了人工智能与大数据在教学中的未来应用。文章将有助于培养更具实际操作能力和创新思维的物流管理人才,为数智化时代的物流行业发展做出贡献。

关键词：数智化教学改革人工智能大数据

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煤炭经济的节能技术与碳中和转型研究

现代工业经济和信息化 2024年第7期14卷 147-149页

作者：丁鹏琴王印凯华北科技学院河北廊坊065201 郑州煤电股份有限公司芦沟煤矿河南郑州452370

以推动低碳经济发展为目标,研究了煤炭经济的节能减排所面临的发展现状和挑战,分析了煤炭行业的碳减排和碳中和转型需要克服技术、经济、政策和社会等多方面的难题,探讨了煤炭经济的节能减排与碳中和转型的关键因素和可行性,为我国经济... 详细信息

以推动低碳经济发展为目标,研究了煤炭经济的节能减排所面临的发展现状和挑战,分析了煤炭行业的碳减排和碳中和转型需要克服技术、经济、政策和社会等多方面的难题,探讨了煤炭经济的节能减排与碳中和转型的关键因素和可行性,为我国经济的转型升级和绿色发展提出了建议,这对于推动低碳经济发展、改善煤炭行业的环境形象以及推动全球低碳经济转型具有重要意义。

关键词：煤炭经济碳中和转型发展

“双碳”目标引领下家庭碳账户体系的构建对策及建议

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黑龙江科学 2024年第5期15卷 18-21页

作者：丁镭张琼沈杨宁波职业技术学院浙江宁波315800

碳账户体系建设是践行国家“双碳”目标的重要路径。随着个人碳账户的不断完善,开展家庭碳账户的试点探索,有助于个人碳账户应用体系与碳市场的建立与完善。从家庭碳账户体系构建的背景及意义出发,通过文献调研与实证调查等方法,分析个... 详细信息

碳账户体系建设是践行国家“双碳”目标的重要路径。随着个人碳账户的不断完善,开展家庭碳账户的试点探索,有助于个人碳账户应用体系与碳市场的建立与完善。从家庭碳账户体系构建的背景及意义出发,通过文献调研与实证调查等方法,分析个人碳账户存在问题及对家庭碳账户体系构建的启示。研究结果表明,个人碳账户建设存在多平台重复建设及标准不统一问题、公平性与合理性问题、信息准确性与偏差问题、以及减排政策框架的有效融合欠缺问题。在“双碳”目标引领下,应设立家庭碳户主并建立家庭碳共济总账户,整合碳账户平台并完善家庭碳账户数据信息,创新家庭碳普惠模式,以构建并完善家庭碳账户体系,促进全民参与绿色低碳生态文明行动。

关键词：家庭碳账户个人碳账户双碳目标节能减排

An optimization method for metamorphic mechanisms based on multidisciplinary design optimization

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Chinese Journal of Aeronautics 2014年第6期27卷 1612-1618页

作者： Zhang Wuxiang Wu Teng ding Xilun State Key Laboratory of Robotics and System Harbin Institute of Technology Institute of Robotics Beihang University

The optimization of metamorphic mechanisms is different from that of the conventional mechanisms for its characteristics of multi-configuration. There exist complex coupled design variables and constraints in its multiple different configuration optimization models. To achieve the compatible optimized results of these coupled design variables, an optimization method for metamorphic mechanisms is developed in the paper based on the principle of multidisciplinary design optimization（MDO）. Firstly, the optimization characteristics of the metamorphic mechanism are summarized distinctly by proposing the classification of design variables and constraints as well as coupling interactions among its different configuration optimization models. Further, collaborative optimization technique which is used in MDO is adopted for achieving the overall optimization performance. The whole optimization process is then proposed by constructing a two-level hierarchical scheme with global optimizer and configuration optimizer loops. The method is demonstrated by optimizing a planar five-bar metamorphic mechanism which has two configurations,and results show that it can achieve coordinated optimization results for the same parameters in different configuration optimization models.

关键词： Configuration Mechanism Metamorphic mechanisms Method Multidisciplinary design optimization Optimization model

Origin and structures of solar eruptions Ⅰ: Magnetic flux rope

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Science China Earth Sciences 2017年第8期60卷 1383-1407页

作者： CHENG Xin GUO Yang ding MingDe School of Astronomy and Space Science Nanjing University Key Laboratory for Modern Astronomy and Astrophysics (Nanjing University) Ministry of Education

Coronal mass ejections(CMEs) and solar flares are the large-scale and most energetic eruptive phenomena in our solar system and able to release a large quantity of plasma and magnetic flux from the solar atmosphere into the solar wind. When these high-speed magnetized plasmas along with the energetic particles arrive at the Earth, they may interact with the magnetosphere and ionosphere, and seriously affect the safety of human high-tech activities in outer space. The travel time of a CME to 1 AU is about 1–3 days, while energetic particles from the eruptions arrive even earlier. An efficient forecast of these phenomena therefore requires a clear detection of CMEs/flares at the stage as early as possible. To estimate the possibility of an eruption leading to a CME/flare, we need to elucidate some fundamental but elusive processes including in particular the origin and structures of CMEs/flares. Understanding these processes can not only improve the prediction of the occurrence of CMEs/flares and their effects on geospace and the heliosphere but also help understand the mass ejections and flares on other solar-type stars. The main purpose of this review is to address the origin and early structures of CMEs/flares, from multi-wavelength observational perspective. First of all, we start with the ongoing debate of whether the pre-eruptive configuration, i.e., a helical magnetic flux rope(MFR), of CMEs/flares exists before the eruption and then emphatically introduce observational manifestations of the MFR. Secondly, we elaborate on the possible formation mechanisms of the MFR through distinct ways. Thirdly, we discuss the initiation of the MFR and associated dynamics during its evolution toward the CME/flare. Finally, we come to some conclusions and put forward some prospects in the future.

关键词： Coronal mass ejections Flares Magnetic flux ropes Magnetic field EUV/UV emissions Photosphere Corona Particle acceleration

Variations in rare earth elements with environmental factors in lake surface sediments from 17 lakes in western China

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Journal of Mountain Science 2021年第7期18卷 1811-1822页

作者： DU ding-ding CHEN Liu-qin BAI Yong-hui HU Hai-ping School of Earth Sciences East China University of TechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and Environment Nanchang 330013China School of Earth Sciences Lanzhou UniversityLanzhou 730000China

Numerous lakes in western China are excellent sites for understanding environmental ***,what dominates rare earth element(REE) variations are still under debate in the lake environmental *** this study,we selected 28 surface sediment samples from 17 lakes(*** lakes,small water bodies,etc.) in the QinghaiTibet Plateau and Xinjiang *** samples were analyzed to reveal the behavior of the REEs and major *** REE patterns are characterized by light rare earth element(LREE) enrichment,weak Ce anomaly(0.84-0.98,0.94 on average) and negative Eu anomaly(0.53-1.00,0.67 on average).The homogeneous REE patterns may reflect similar REE of the source ***,the REE abundances showed some significant *** this study,water chemistry data analyses inferred that the highly REE values appear possibly in the saltwater lake,and also related to carbonate mineral,whereas p H played a minor role in REE *** large-scale lakes(*** Bosten and Lake Ulungur),the results showed that the relatively larger REE values are in the margins of ***,lower REE contents are towards the central *** study suggested that five major factors control the REE contents:(1) The REE tends to increase with the increase of the weathering intensity.(2) Likewise,heavy mineral(***,anatase,zircon,etc.) are probably primary in these sediments because they are highly enriched in the REE.(3) The contribution of Fe-Mn oxides is significant in sediments because their concentrations highly correlate with the REE.(4) The carbonate mineral(mainly calcite) played a significant role on the REE values in the lakes because the REEs are incorporated into the carbonate minerals generating the low REE concentrations.(5) Major element analysis,mineral analysis,and grain-size data analysis showed that the REE distribution is chiefly influenced by finer grain-size component of lake sediments due to the decreasing propor

关键词： Western China Lake surface sediments Rare earth elements Environmental factors

BCSP31蛋白双抗夹心ELISA定量方法的建立及应用

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中国兽医学报 2024年第4期44卷 699-705页

作者：陈凯楠李金斗丁佳欣冯嘉轩于喜冰单春晖汪思捷丁壮吉林大学动物医学学院人畜共患传染病重症诊治全国重点实验室吉林长春130062 长春中医药大学临床医学院吉林长春130117

通过原核表达系统制备、纯化布鲁菌嵌合病毒样颗粒疫苗核心组分BCSP31蛋白,并将其作为免疫原及标准品分别免疫新西兰大白兔(1mg/只)和BALB/c鼠(200μg/只)制备兔源捕获多克隆抗体和鼠源检测多克隆抗体,对双抗夹心ELISA方法的捕获抗体和... 详细信息

通过原核表达系统制备、纯化布鲁菌嵌合病毒样颗粒疫苗核心组分BCSP31蛋白,并将其作为免疫原及标准品分别免疫新西兰大白兔(1mg/只)和BALB/c鼠(200μg/只)制备兔源捕获多克隆抗体和鼠源检测多克隆抗体,对双抗夹心ELISA方法的捕获抗体和检测抗体最佳稀释倍数、封闭液种类及封闭条件、酶标二抗工作条件等参数进行优化,结果显示兔多克隆抗体最佳包被浓度和鼠多克隆抗体最佳稀释倍数均为1∶1600、3%脱脂奶粉封闭1h、酶标二抗最佳稀释倍数为1∶4000、酶标二抗孵育时间1h、显色时间为15min的条件下建立的双抗夹心ELISA方法效果最好。按照上述最佳反应条件对布鲁菌嵌合病毒样颗粒疫苗(BCSP31-cVLPs)核心抗原成分BCSP31蛋白进行定量检测,并对其敏感性、特异性、重复性等性能进行评价,结果显示1μL布鲁菌嵌合病毒样颗粒中的BCSP31含量约占总蛋白含量的14.187%;将布鲁菌嵌合病毒样颗粒稀释640倍后,P/N值仍大于2.1,有较高的敏感性;与FAdV、IBDV、NDV、AIV等其他病毒样颗粒均无交叉反应,特异性高;批间和批内变异系数均在10%以下,重复性良好。该方法的建立为推进布鲁菌嵌合病毒样颗粒疫苗的质量控制标准建立及商品化奠定了基础。

关键词：布鲁菌病嵌合病毒样颗粒 BCSP31蛋白双抗夹心ELISA方法参数优化应用