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基于深度估计置信度的聚焦形貌恢复

计算机工程 2024年第3期50卷 233-241页

作者：史艳琼查昭张文亮戴尔愉陈中安徽建筑大学机械与电气工程学院安徽合肥230601

聚焦形貌恢复是非接触式三维重建领域中的重要技术手段。由于环境的影响和相机本身的限制,图像采集过程中会不可避免地产生噪声信息,影响重建精度。针对该问题,提出一种高精度、抗噪声的聚焦形貌恢复算法。使用聚焦评价函数对离焦序列... 详细信息

聚焦形貌恢复是非接触式三维重建领域中的重要技术手段。由于环境的影响和相机本身的限制,图像采集过程中会不可避免地产生噪声信息,影响重建精度。针对该问题,提出一种高精度、抗噪声的聚焦形貌恢复算法。使用聚焦评价函数对离焦序列图像进行评价,得到聚焦评价序列图像,并使用高斯拟合峰值法定位像素聚焦位置获得初始深度图。在此基础上,通过像素的聚焦评价曲线与灰度曲线之间的相似度衡量深度估计置信度,生成初始深度图的置信图,并将置信图作为引导图对初始深度图进行引导滤波,得到优化后的深度图。使用多组仿真离焦序列图像与真实显微离焦序列图像对所提方法进行性能验证,实验结果表明:所提方法在仿真与真实离焦序列中均能表现出优良的三维重建效果,在真实数据实验中,所提方法的所有指标均优于基于深度图优化的方法,与传统方法相比均方根误差分别降低64.8%和47.3%以上,相关系数分别提高2.18%和6.35%以上,具有更高的精度和更强的抗噪性,能有效提高聚焦形貌恢复精度。

关键词：聚焦形貌恢复三维重建相似度置信度深度图引导滤波

High micropore-utilization carbon aerogel with controlled nanostructures via adjusting aggregation state of polyacrylonitrile for energy storage systems

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SusMat 2024年第4期4卷 27-38页

作者： Yuanyou Peng Yihan Fu Meimei Yu Lei zhao huanzhong Zeng Shengtao Niu Jie Zhang Junlong Chen Guang Liu Youzhi Wu Fen Ran State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals Department of Polymeric Materials EngineeringSchool of Material Science and EngineeringLanzhou University of TechnologyLanzhouChina

Designing and optimizing the pore structure of porous carbon electrodes is essen-tial for diverse energy storage *** this study,an innovative approach spray phase-inversion strategy was developed for the rapid and efficient fabri-cation of controlled porous carbon ***,the aggregation structure of polyacrylonitrile is controlled by adjusting the Hansen’s solubility parameter,thereby regulating the electrode material ***,the theoretical analysis of the spray phase-inversion process revealed that this regulation pro-cess is jointly regulated by solvent hydrodynamic diameter and phase-inversion *** optimization,a novel porous carbon material was obtained that exhibited excellent performance as an electrode *** utilized in supercapacitors for energy storage,it demonstrated a high specific capacitance of 373.1 F g^(-1) in a 6 M KOH electrolyte ***,it has been observed that the preparation strategy for porous electrodes offers notable advan-tages in terms of excellent designability,broad universality,simplicity,and high efficiency,thereby holding promise for large-scale fabrication of diverse porous electrode materials and various types of electrodes for diverse energy storage applications.

关键词： aggregation structure electrode materials phase inversion porous carbon supercapacitors

结构化约束、策略性合作与外嵌型悬浮:一个农村社工组织的生存过程追踪

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中国行政管理 2024年第5期40卷 85-97页

作者：付钊华中师范大学社会学院武汉430079

当前政府购买服务数量激增,但社工组织真正能够促进基层治理创新的成效不显。本文基于“结构-过程-功能”分析框架透视Q组织实践过程,探究社工组织在基层治理中“外嵌型悬浮”样态的生成逻辑和机制。研究发现:政府购买服务中社工组织面... 详细信息

当前政府购买服务数量激增,但社工组织真正能够促进基层治理创新的成效不显。本文基于“结构-过程-功能”分析框架透视Q组织实践过程,探究社工组织在基层治理中“外嵌型悬浮”样态的生成逻辑和机制。研究发现:政府购买服务中社工组织面临对上级政府的资源依赖结构、以乡政府为核心的权力结构、向上负责的问责结构、基层组织间的竞争结构和纵向关系中的控制结构等结构化约束。结构化约束下的社工组织与各治理主体进行多重资源、权力和专业互动中处于弱势地位。社工组织在行政-专业双重目标博弈下不断生产最优的生存性行动策略以适应制度和结构压力,表现出从“行政吸纳与自愿依附-事项转移与组织联盟-控制摊派与夹缝生存”的“交互吸纳”预期到“统合附属”选择,再到“嵌入失灵”的风险过程。由此,社工组织实践呈现出“身份情景脱嵌、功能内核错位、专业服务泛化”的内卷化样态,面临着脱离治理结构而又物化于治理场域的外嵌型悬浮困境需优化治理结构,实现良性互动。

关键词：社会工作嵌入型发展乡村治理社工组织外嵌型悬浮

希圣与尊经——扬雄和刘歆的“复古”路径及其脉络辨析

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文史哲 2024年第1期 99-114,167页

作者：赵培中国社会科学院文学研究所北京100732

扬雄和刘歆可谓经学发展史上节点式的人物,面对西汉末年博士经学的颓态,他们希望通过“复古”回到儒学最初的根本,然取径相异:扬雄缵绪圣人之所为,广圣道、拟众经;刘歆则在汉代官方立学原则的基础上,试图通过广学、正经、诂经来变革利... 详细信息

扬雄和刘歆可谓经学发展史上节点式的人物,面对西汉末年博士经学的颓态,他们希望通过“复古”回到儒学最初的根本,然取径相异:扬雄缵绪圣人之所为,广圣道、拟众经;刘歆则在汉代官方立学原则的基础上,试图通过广学、正经、诂经来变革利禄之学的衰局。纵览儒学在秦汉时期的发展,可知扬雄希圣拟经的行为实际上同儒学“博采诸学,折中于一”的子学自新精神一脉相承,与司马迁和董仲舒可归为一类,在西汉儒学中自有其位置;刘歆其人其学仍在西汉今文经学统序之中,其援古济今的经学革新努力虽然是中央官学内部的调整,但将儒生的视线从固化了的师法转移回了经典文本之上,有意无意间导引了训经诂圣的后汉经学路径。

关键词：扬雄刘歆希圣尊经复古

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新时代财政政策提质增效推动新质生产力培育和发展

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财政研究 2024年第3期 27-32页

作者：赵峰中国人民大学经济学院中国人民大学全国中国特色社会主义政治经济学研究中心

财政是国家治理的基础和重要支柱,发展新质生产力、形成新型生产关系是新时代财政政策服务高质量发展的重要任务。党的领导是做好财政工作的根本保障。推动财政政策提质增效,必须坚持财政理论的守正创新,在做好总量调节的同时,着力加强... 详细信息

财政是国家治理的基础和重要支柱,发展新质生产力、形成新型生产关系是新时代财政政策服务高质量发展的重要任务。党的领导是做好财政工作的根本保障。推动财政政策提质增效,必须坚持财政理论的守正创新,在做好总量调节的同时,着力加强结构优化,增强财政政策与其他宏观政策的综合协调性,在建设现代化经济体系、兜住民生底线、构建高水平社会主义市场经济体制和扩大新型国内需求方面更加积极有为。有必要总结中国特色社会主义宏观调控,尤其是财政调控的成功经验和规律,凝练上升为中国自主的经济学知识体系的重要组成部分,为新质生产力发展和中国式现代化顺利推进提供智力支持。

关键词：新质生产力中国特色财政调控提质增效政策协调结构优化

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WTO国有企业相关问题:局限、趋势及对策

经济问题 2024年第4期 13-20页

作者：赵威中国政法大学国际法学院北京100088

国有经济已经成为世界经济的重要组成部分,在全球范围内形成了不容小觑的竞争力量。为避免国有企业利用自身优势扭曲国际贸易,世界贸易组织采取“利益接受者”与“利益提供者”两种范式对国有企业相关问题作出规定,形成国有企业的基本... 详细信息

国有经济已经成为世界经济的重要组成部分,在全球范围内形成了不容小觑的竞争力量。为避免国有企业利用自身优势扭曲国际贸易,世界贸易组织采取“利益接受者”与“利益提供者”两种范式对国有企业相关问题作出规定,形成国有企业的基本规则框架,但相应规则存在适用范围有限、约束色彩较弱及界定标准不清等缺陷,为确保国有企业公平贸易及合规经营带来法律障碍。新一代国际经贸相关规则以竞争中立原则为导向,具有扩展国有企业非歧视义务、强化商业考虑要求及透明度要求、发展非商业援助条款及确立例外与过渡条款的趋势,一定程度上反映了多边贸易体系关于国有企业问题的改革方向。中国应以相应趋势为导向,通过参与国有企业规则谈判、争取例外与过渡条款、深化国有企业混合所有制改革及完善国有企业信息披露义务等方法,应对国有企业规则变革。

关键词：世界贸易组织国有企业竞争中立原则国有企业规则改革

可见光诱导玫瑰红催化喹喔啉-2(1H)-酮的C3-H烷基化反应

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化学研究与应用 2024年第2期36卷 331-337页

作者：赵能选徐宏烈刘华李兰杰浙江埃森化学有限公司浙江金华322118

建立了一种简单、实用的光诱导一锅法高选择性N-甲基喹喔啉酮类化合物和苯乙酮类化合物合成一系列3-烷基化喹唑啉-2(1H)-酮类化合物的方法。该方法在室温条件下,以玫瑰红作为光催化剂,在18 W 460 nm的蓝色LED下照射8 h,通过直接C3-H活... 详细信息

建立了一种简单、实用的光诱导一锅法高选择性N-甲基喹喔啉酮类化合物和苯乙酮类化合物合成一系列3-烷基化喹唑啉-2(1H)-酮类化合物的方法。该方法在室温条件下,以玫瑰红作为光催化剂,在18 W 460 nm的蓝色LED下照射8 h,通过直接C3-H活化的方案,较好收率获得一系列相应的3-烷基化喹喔啉-2(1H)-酮类化合物,最高产率可达到76%。反应体系具有经济实用性和底物适用范围广的特点,为3-烷基化喹喔啉-2(1H)-酮类化合物类化合物的合成提供了一种简便经济的方法。

关键词：可见光喹唑啉-2(1H)-酮苯丙酮 3-烷基化喹唑啉-2(1H)-酮

General theory for designing phonon transport in alloyed/doped materials

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Chenhan Liu Chao Wu Wei Liu Yunshan zhao Gang Zhang Hongmin Yang Yunfei Chen Micro-and Nano-scale Thermal Measurement and Thermal Management Laboratory Key Laboratory of Numerical Simulation for Large Complex Systems Ministry of Education School of Energy and Mechanical Engineering Nanjing Normal University School of Electrical and Automation Engineering Nanjing Normal University Phonon Engineering Research Center of Jiangsu Province Center for Quantum Transport and Thermal Energy Science Institute of Physics Frontiers and Interdisciplinary Sciences School of Physics and Technology Nanjing Normal University Institute of High-Performance Computing Agency for Science Technology and ResearchSingapore Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical Engineering Southeast University

Alloying/doping is a widely used technique for improving the electrical, mechanical, and optical properties of ***, this technology induces significant distortions in the lattice structure, mass distribution, and potential field, greatly enhancing phonon scattering. Here, we introduce the concept of alloying/doping path and employ crystal symmetry, lattice deformation, and electron distribution to characterize it. Based on this new concept, the phonon thermal transport behavior in alloyed/doped materials can be well designed, and along different alloying/doping paths, the difference in thermal conductivity can be up to 45 times. On one hand, strategic alloying/doping that combines high crystal symmetry, large lattice contraction, and the same electron distribution suppresses phonon-phonon scattering phase space, induces phonon stiffening, and bolsters electronic structure symmetry, respectively. These synergistic effects significantly improve thermal conductivity. On the other hand, random alloying/doping has a low symmetry, leading to the typical “U” shape of alloying/doping level-dependent thermal conductivity. Our theory is corroborated in three-dimensional（3D） Si, 2D MoS2, and quasi-1D TiS3, affirming its efficacy and broad applicability in controlling phonon transport.

关键词：

VX-509 attenuates the stemness characteristics of colorectal cancer stem-like cells by regulating the epithelial-mesenchymal transition through Nodal/Smad2/3 signaling

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World Journal of Stem Cells 2024年第2期16卷 207-227页

作者： Yun Yuan Xu-Fan Zhang Yu-Chen Li Hong-Qing Chen Tian Wen Jia-Lian Zheng Zi-Yi zhao Qiong-Ying Hu Department of Laboratory Medicine Hospital of Chengdu University of Traditional Chinese MedicineChengdu 610072Sichuan ProvinceChina Department of Nuclear Medicine Hospital of Chengdu University of Traditional Chinese MedicineChengdu 610072Sichuan ProvinceChina College of Medical Technology Chengdu University of Traditional Chinese MedicineChengdu 611137Sichuan ProvinceChina Department of Hepatology Affiliated Hospital of Liaoning University of Traditional Chinese MedicineShenyang 110032Liaoning ProvinceChina Hospital of Chengdu University of Traditional Chinese Medicine Chengdu 610072Sichuan ProvinceChina Traditional Chinese Medicine Regulating Metabolic Diseases Key Laboratory of Sichuan Province Chengdu 610072Sichuan ProvinceChina

BACKGROUND Colorectal cancer stem cells(CCSCs)are heterogeneous cells that can self-renew and undergo multidirectional differentiation in colorectal cancer(CRC)*** are generally accepted to be important sources of CRC and are responsible for the progression,metastasis,and therapeutic resistance of ***,targeting this specific subpopulation has been recognized as a promising strategy for overcoming *** To investigate the effect of VX-509 on CCSCs and elucidate the underlying *** CCSCs were enriched from CRC cell lines by in conditioned serum-free *** blot,Aldefluor,transwell and tumorigenesis assays were performed to verify the phenotypic characteristics of the *** anticancer efficacy of VX-509 was assessed in HCT116 CCSCs and HT29 CCSCs by performing cell viability analysis,colony formation,sphere formation,flow cytometry,and western blotting assessments in vitro and tumor growth,immunohistochemistry and immunofluorescence assessments in *** Compared with parental cells,sphere cells derived from HCT116 and HT29 cells presented increased expression of stem cell transcription factors and stem cell markers and were more potent at promoting migration and tumori-genesis,demonstrating that the CRC sphere cells displayed CSC ***-509 inhibited the tumor malignant biological behavior of CRC-stem-like cells,as indicated by their proliferation,migration and clonality in vitro,and suppressed the tumor of CCSC-derived xenograft tumors in ***,VX-509 suppressed the CSC character-istics of CRC-stem-like cells and inhibited the progression of epithelial-mesenchymal transition(EMT)signaling in *** was identified as the regulatory factor of VX-509 on CRC stem-like cells through analyses of differen-tially expressed genes and CSC-related database ***-509 markedly downregulated the expression of Nodal and its downstream phosphorylated Smad2/3 to inhibit EMT ***,VX-509 rev

关键词： Colorectal cancer stem cells Stemness VX-509 Epithelial-mesenchymal transition Nodal