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航空发动机叶片型面叶展轮廓度CMM测量及评价技术

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制造业自动化 2023年第5期45卷 113-117页

作者：孙涛皮志超刘佳欢王丹伟上海航翼高新技术发展研究院有限公司上海200082

航空发动机叶片作为影响航空发动机性能的主要零部件,其加工质量和测量准确性决定了发动机的最终质量。在叶片加工中,叶展方向刚性最差,导致叶片在叶展方向容易产生加工变形。叶展轮廓度误差和叶展轮廓度变化率直接反映叶展方向误差。... 详细信息

航空发动机叶片作为影响航空发动机性能的主要零部件,其加工质量和测量准确性决定了发动机的最终质量。在叶片加工中,叶展方向刚性最差,导致叶片在叶展方向容易产生加工变形。叶展轮廓度误差和叶展轮廓度变化率直接反映叶展方向误差。提出了三坐标测量机沿叶展方向截面对叶展轮廓测量路径的规划方法,研究了叶展轮廓度误差和叶展轮廓度变化率的计算方法。最后通过实例进行了验证,得到叶展轮廓度误差和叶展轮廓度变化率,实现叶片叶展方向形状符合程度的评价。

关键词：叶展轮廓度叶展轮廓度变化率 CMM测量配准

Surface-confined persistent luminescence with amplified FRET efficiency for cell-cell communication monitoring

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Science China Chemistry 2025年

作者： Ziyun Miao Wenjing Dai Yubin Jin Bing Qi Jiayi Chen Lingling Qiu Yurong wei Jie wang The Key Lab of Health Chemistry&Molecular Diagnosis of Suzhou College of ChemistryChemical Engineering&Materials ScienceSoochow University

Microbial communication monitoring is vital for understanding the mechanisms beneath gut microbiota equilibrium, infections,and biomanufacturing. Herein, we reported monitoring bacterial communication by surface-confined persistent ***, we constructed core-shell structured Zn1.4Ga1.2Ge0.4O4@Zn1.4Ga1.2Ge0.4O4:Cr（ZGGO@ZGGO:Cr） persistent luminescence nanoparticles（PLNPs） with amplified FRET efficiency for the detection of azoreductase（AzoR） that participates in bacterial communication. ZGGO@ZGGO:Cr nanoparticles were functionalized with an azo black hole quencher（ZGGO@ZGGO:Cr-BHQ-3）. Due to the proximity of surface-confined persistent luminescence with the surface-bound BHQ-3,ZGGO@ZGGO:Cr-BHQ-3 exhibited a FRET efficiency up to 1.6 times that of traditional ZGGO:Cr-BHQ-3. Further, the specific catalytic reduction of azo bonds in BHQ-3 by bacterial extracellular AzoR recovers the persistent luminescence of ZGGO@ZGGO:Cr. ZGGO@ZGGO:Cr-BHQ-3 displayed superior sensitivity and speed in detecting extracellular AzoR over ZGGO:Cr-BHQ-3, attributed to its surface-confined persistent luminescence. We found that the peak secretion of AzoR occurs during the exponential growth period of bacteria including S. aureus and E. coli based on the persistent luminescence recovery rate of ZGGO@ZGGO:Cr-BHQ-3. Furthermore, ZGGO@ZGGO:Cr-BHQ-3 was used to probe the communication between different bacterial species. R. palustris is a kind of lycopene-production bacteria. We found that the cohabitation of R. palustris and S. putrefaciens boosted both AzoR secretion and lycopene production. Moreover, the secretion and activity of AzoR positively correlated with lycopene production, suggesting that AzoR may participate in the communication between R. palustris and S. putrefaciens to promote lycopene production. This study offers a robust method to enhance PLNP-based biosensing sensitivity and provides a promising strategy for microbial communication monitoring.

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Palladium installed copper-organic framework for C–C coupling reactions

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Science China Chemistry 2025年

作者： Yu-Mei wang Mei-Xia Tao Kai-Ming Mo Xu Chen Shu-Hua Zhong Elena S Shubina Guo-Hong Ning dan Li College of Chemistry and Materials Science Guangdong Provincial Key Laboratory of Supramolecular Coordination ChemistryJinan University A.N.Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences

The formation of C–C bonds is a crucial aspect of organic synthesis. Synthesists' long-term objective is to identify novel catalysts to optimize reaction systems based on traditional transition metal catalysis. This study explores the synthesis and catalytic potential of palladium-installed covalent metal-organic frameworks(CMOFs) based on copper cyclic trinuclear units(Cu-CTUs). By incorporating palladium ions into the imine-based framework JNM-7 through a straightforward immersion method, we achieved a notable enhancement in catalytic activity for critical C–C coupling reactions, including C–H arylation and Sonogashira cross-coupling. The resulting JNM-7-Pd demonstrated remarkable stability and recyclability, maintaining its efficiency over at least three cycles without any decline in efficiency.

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大气科学优先资助领域的计量学初步分析

地球科学进展 2006年第7期21卷 757-762页

作者：张政许小峰王卫丹王雪臣张洪广冷春香胡欣北京大学物理学院北京100871 中国气象局北京100081

依据对国内大气科学相关机构进行广泛调研获取的数据,以及近期国内、国际有关大气科学期刊论文数据,通过计量学方法,按照国内基础、国内热点、国际热点和国内需求四个方面从不同角度对大气科学优先资助领域进行了分析,并根据不同政策偏... 详细信息

依据对国内大气科学相关机构进行广泛调研获取的数据,以及近期国内、国际有关大气科学期刊论文数据,通过计量学方法,按照国内基础、国内热点、国际热点和国内需求四个方面从不同角度对大气科学优先资助领域进行了分析,并根据不同政策偏好设置权重对大气科学各领域进行了排序。分析表明,不论是偏重于基础研究还是偏重于应用研究,优先资助人工影响天气和大气物理领域可能会获得更大的回报;若重视科学热点、科技前沿,优先资助气候系统与全球变化和天气动力学理论与天气预报领域可能会取得更多的研究成果;若重视发展需求与科技前沿相结合,优先资助大气化学和综合探测系统领域投入资金可能会发挥更大的效益。研究结果可以为更好地了解我国大气科学发展现状,制定大气科学中长期发展战略,制定大气科学“十一五”优先资助领域战略提供一定的参考依据。

关键词：大气科学优先领域计量学分析

A coordinated planning strategy of energy storage allocation and line upgrading to increase photovoltaic consumption with lowest planning cost

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Science China Technological Sciences 2025年

作者： Bo ZHANG Yuqi JI Lu ZHANG wei TANG Xiaohui ZHANG Liang wang Haoran DING Hanchen MAO College of Information and Electrical Engineering China Agricultural University State Grid Heilongjiang Electric Power Research Institute State Grid Heilongjiang Electric Power Company Limited School of Electrical and Information Engineering Zhengzhou University of Light Industry

Random integration of massive distributed photovoltaic (PV) generation poses serious challenges to distribution networks. Voltage violations, line overloads, increased peak–valley differences, and power-flow reversals can occur at different locations, times, and severities. Traditional planning methods such as energy storage (ES) allocation and upgrading of lines may result in poor economics and low equipment utilization. This study proposes a distribution-network planning strategy that coordinates three planning mechanisms:ES allocation to substations and to feeders, and line upgrading. The proposed strategy achieved the lowest annual cost, considering the distribution network problems at different locations, times, and severities. A net load curve description method was first proposed considering economic planning and the uncertain distribution of loads and PVs. Second, a multistage optimization model for ES allocation and line upgrading was established based on the net load curves. Finally, an improved IEEE33 node system was used in the case study. The planning results show that the proposed coordinated planning strategy can address the problems caused by the random integration of massive distributed PVs, improve equipment utilization, and obtain the lowest total annual planning cost.

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基于优化重油加工路线的炼油转型升级实践与探讨

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石油炼制与化工 2025年第1期56卷 107-116页

作者：王伟中韩(武汉)石油化工有限公司武汉430082

以“小炼油、大乙烯”配置的炼化企业为例,从炼油总流程出发,分析其炼油盈利能力差的主要原因是重油加工路线不优化、催化重整(简称重整)装置和催化裂化装置加工能力偏低、焦化装置加工能力偏高、天然气制氢成本高。提出炼油转型升级的... 详细信息

以“小炼油、大乙烯”配置的炼化企业为例,从炼油总流程出发,分析其炼油盈利能力差的主要原因是重油加工路线不优化、催化重整(简称重整)装置和催化裂化装置加工能力偏低、焦化装置加工能力偏高、天然气制氢成本高。提出炼油转型升级的两步走思路,讨论了高掺渣催化裂化工艺在炼油转型升级中的效果与不足。在此基础上,利用炼油化工全流程模型,探讨了建设直馏柴油中压加氢改质装置和连续重整装置的必要性,并对建设溶剂脱沥青装置与固定床重油加氢装置进行了比选,为企业的下一步发展提供思路和方向。

关键词：炼油转型升级重油加工路线优化乙烯原料

Facile synthesis of the dodecahydridododecaborate (B12H122-) from borane Lewis base adducts

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Science China Chemistry 2025年

作者： Yi Jing Xin-Ran Liu Xing-Hua wang Hui Han Sha-Sha Liang Xi-Meng Chen Dong-Hui wei Lai-Sheng wang Xue-Nian Chen College of Chemistry Zhengzhou University School of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced MaterialsHenan Normal University Department of Chemistry Brown University

Polyhedral boranes are a class of well-known boron molecular clusters widely used in energy,chemistry,medicine,and materials science because of their unique physical and chemical *** efforts have been made in the past decades to find more effective synthetic methods for this important class of boron ***,existing synthetic methods suffer from low efficiency and low ***,we report a facile one-pot synthesis of[（CH3）3S]2B12H12with moderate yields at mild *** mechanisms for the multi-step chemoselective synthesis of B12H122-without other by-products are elucidated based on theoretical results and our previous *** Lewis base used in B–H bond condensation reaction,which acts as a hydrogen or to balance the newly generated polyhedral borane charges,is proposed and studied in *** current study has led to a more effective and selective synthetic method for B12H122-and has also implicated the syntheses of other new polyhedral boranes.

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Engineering N3C vacancies in hierarchical porous carbon nitride nanosheets for room temperature ultradeep photocatalytic aerobic oxidative desulfurization

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Science China Chemistry 2025年

作者： Yina Nie weijie Yang Xin wang Xiang Li Lele wei Xiaolin Bai Lin Liu Feng Fu Jun Wan College of Chemistry & Chemical Engineering Research Institute of Comprehensive Energy Industrial Technology Shaanxi Key Laboratory of Chemical Reaction Engineering Yan'an University Anhui Engineering Research Center of Carbon Neutrality College of Chemistry and Materials Science Anhui Normal University

The production of ultra-low sulfur clean fuels holds global significance for improving energy efficiency and reducing environmental pollution. Photocatalytic aerobic oxidative desulfurization（PODS） offers an attractive approach to efficiently remove refractory heterocyclic aromatic sulfur compounds under mild conditions. However, the sluggish charge dynamics,insufficient molecule activation, and slow mass transfer within photocatalysts restrict the overall desulfurization efficiency,hindering the widespread application of this technology. Herein, we developed a defective g-C3N4（M1U3CN） photocatalyst with bridged N3Cvacancies and hierarchical porous structures to address these limitations. This catalyst not only demonstrates outstanding dibenzothiophene（DBT） removal efficiency of 99.6% for model oil with high conversion and selectivity but also achieves complete sulfur removal from gasoline as well as 96.7% sulfur removal for distilled diesel at room temperature,successfully achieving ultradeep aerobic oxidative desulfurization. The introduction of rich N3Cvacancies and abundant micromeso-macroporous distribution in M1U3CN enhances kinetic efficiencies by promoting charge carrier separation, mass transfer,and molecular activation simultaneously; resulting in exceptional PODS performance. This work provides a collaborative strategy to overcome kinetic challenges in aerobic oxidative desulfurization via defect and structural engineering of the catalyst.

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省域高等教育分类发展的竞合逻辑与实践路径

高校教育管理 2025年第1期19卷 74-83页

作者：王丹吴立保南京信息工程大学高等教育研究所江苏南京210044 淮北师范大学教育学院安徽淮北235000

实现高等教育分类发展是建设教育强国的先决条件,省域高等教育分类发展对教育强国建设负有主体责任。本研究依托竞合理论,针对省域高等教育分类标准固化、合作联动不足和分类目标建设失衡、合作理念和行动不足等问题,提出竞合视角下省... 详细信息

实现高等教育分类发展是建设教育强国的先决条件,省域高等教育分类发展对教育强国建设负有主体责任。本研究依托竞合理论,针对省域高等教育分类标准固化、合作联动不足和分类目标建设失衡、合作理念和行动不足等问题,提出竞合视角下省域高等教育分类发展的实践路径,通过构建省域高等教育分类多主体竞合生态关系,建立互涉共生的省域高校分类发展主体,形成互补嵌入的结构化竞合和评价机制,分类引领确立互为目标的价值旨归以突破传统分类发展中的路径依赖和组织惯习影响,为建设中国特色、世界一流的高等教育贡献力量。

关键词：省域高等教育分类发展竞合理论生态关系实践路径