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Arbitrary topological charge vortex beams from carbon dots random lasers

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Rare Metals 2024年第8期43卷 3844-3853页

作者： Xiang-Dong Wang Xiao-Bo Mi jiu-Ru He Feng-Ying Ma Jun-Qiao Wang Li song Yong-Qiang Zhang Si-Yu Lu Yong-Sheng Hu School of physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Reliability and Intelligence of Electrical Equipment and Tianjin Key Laboratory of Electronic Materials and Devices School of Electronics and Information EngineeringHebei University of TechnologyTianjin 300401China Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou450001China

Vortex beams have attracted great attention due to their promising applications in the fields of high-capacity optical communication,optical micromanipulation,and quantum information ***,we demonstrate vortex beams with flexible control of the topological charge and modes in a carbon dots random laser for the first *** beams with different types,including the Laguerre-Gaussian(LG),Bessel-Gaussian(BG),LG-superposition,and polarized vortex beams with topological charges up to 50,have been successfully ***,vortex beams can be well realized in carbon dots random lasers with different emission wavelengths covering from 465 to 612 *** work would not only enrich the types of vortex laser,especially for solution-processable lasers,but also provide a new route to realizing multicolor and wavelength-tunable vortex lasers.

关键词： Carbon dots Random lasers Vortex beam Topological charge Spatial light modulator

Increasing the toughness while reducing the viscosity of carbon nanotube/ polyether imide/polyether ether ketone nanocomposites

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新型炭材料（中英文） 2024年第4期39卷 715-728页

作者： song jiu-p.ng ZHAO Yan LI Xue-kuan XIOng Shu LI Shuang WAng Kai School of Materials Science and Engineering Beihang UniversityBeijing 100191China

polyether ether ketone(pEEK)has good mechanical ***,its high viscosity when molten limits its use because it is hard to *** nanocomposites containing both carbon nanotubes(CNTs)and polyether imide(pEI)were pre-pared by a direct wet powder blending method using a vertical injection molding *** addition of an optimum amount of pEI lowered the viscosity of the molten pEEK by approximately 50%while producing an increase in the toughness of the nanocom-posites,whose strain to failure increased by 129%,and fracture energy increased by 97%.The uniformly dispersed CNT/pEI powder reduced the processing difficulty of pEEK nanocomposites without affecting the thermal *** improvement of the strength and viscosity of pEEK facilitate its use in the preparation of thermoplastic composites.

关键词： Nanocomposites Mechanical properties Rheological properties Microstructural analysis

Biological scaffold as potential platforms for stem cells:Current development and applications in wound healing

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World Journal of Stem Cells 2024年第4期16卷 334-352页

作者： Jie-Yu Xiang Lin Kang Zi-Ming Li song-Lu Tseng Li-Quan Wang Tian-Hao Li Zhu-Jun Li jiu-Zuo Huang Nan-Ze Yu Xiao Long Department of plastic and Reconstructive Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Biomedical Engineering Facility Institute of Clinical MedicinePeking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100021China

Wound repair is a complex challenge for both clinical practitioners and *** approaches for wound repair have several *** cell-based therapy has emerged as a novel strategy to address this issue,exhibiting significant potential for enhancing wound healing rates,improving wound quality,and promoting skin ***,the use of stem cells in skin regeneration presents several ***,stem cells and biomaterials have been identified as crucial components of the wound-healing *** therapy involving the development of biocompatible scaffolds,accompanying cells,multiple biological factors,and structures resembling the natural extracellular matrix(ECM)has gained considerable *** scaffolds encompass a range of biomaterials that serve as platforms for seeding stem cells,providing them with an environment conducive to growth,similar to that of the *** scaffolds facilitate the delivery and application of stem cells for tissue regeneration and wound *** article provides a comprehensive review of the current developments and applications of biological scaffolds for stem cells in wound healing,emphasizing their capacity to facilitate stem cell adhesion,proliferation,differentiation,and paracrine ***,we identify the pivotal characteristics of the scaffolds that contribute to enhanced cellular activity.

关键词： Stem-cell-based therapy Biological scaffolds Wound healing Extracellular matrix mimicry Cellular activities enhancement Scaffold characteristics

Adipose-derived stem cells in diabetic foot care:Bridging clinical trials and practical application

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World Journal of Diabetes 2024年第6期15卷 1162-1177页

作者： song-Lu Tseng Lin Kang Zhu-Jun Li Li-Quan Wang Zi-Ming Li Tian-Hao Li Jie-Yu Xiang jiu-Zuo Huang Nan-Ze Yu Xiao Long Department of plastic and Reconstructive Surgery Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of plastic and Reconstructive Surgery Peking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Biomedical Engineering Facility Institute of Clinical MedicinePeking Union Medical College HospitalChinese Academy of Medical Sciences BeijingBeijing 100021China

Diabetic foot ulcers(DFUs)pose a critical medical challenge,significantly impairing the quality of life of ***-derived stem cells(ADSCs)have been identified as a promising therapeutic approach for improving wound healing in *** extensive exploration of the mechanical aspects of ADSC therapy against DFU,its clinical applications remain *** this review,we aimed to bridge this gap by evaluating the use and advancements of ADSCs in the clinical management of *** review begins with a discussion of the classification and clinical management of diabetic foot *** then discusses the current landscape of clinical trials,focusing on their geographic distribution,reported efficacy,safety profiles,treatment timing,administration techniques,and dosing ***,the review discusses the preclinical strategies to enhance ADSC *** review shows that many trials exhibit biases in study design,unclear inclusion criteria,and intervention *** conclusion,this review underscores the potential of ADSCs in DFU treatment and emphasizes the critical need for further research and refinement of therapeutic approaches,with a focus on improving the quality of future clinical trials to enhance treatment outcomes and advance the field of diabetic wound care.

关键词： Adipose-derived stem cells Diabetic foot ulcers Wound healing Clinical

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翁同龢金石书画题跋中的“政治形象”

美术观察 2024年第8期 57-60页

作者：宋玖安山东工艺美术学院造型艺术学院

作为晚清政治人物的翁同龢,亦是金石书画的大藏家,在近代鉴藏史上有重要地位。观其题跋文字,每能结合自身经历来书写,宦迹沉浮、关心民瘼、感慨国事之情皆寓其中,读来可感可敬,这些文字勾勒出了翁同龢的“政治形象”。本文试以数通题跋... 详细信息

作为晚清政治人物的翁同龢,亦是金石书画的大藏家,在近代鉴藏史上有重要地位。观其题跋文字,每能结合自身经历来书写,宦迹沉浮、关心民瘼、感慨国事之情皆寓其中,读来可感可敬,这些文字勾勒出了翁同龢的“政治形象”。本文试以数通题跋为例,透过文字循其本事,论析其旨趣与感发。在清末、民国两次官方所修的翁同龢传记中,涉及翁同龢身后“政治形象”的“再写”,对其题跋文字亦有所参酌。

关键词：翁同龢题跋政治形象

Dissecting Causal Relationships Between plasma Metabolites and Osteoporosis:A Bidirectional Mendelian Randomization Study

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Chinese Medical Sciences Journal 2024年第3期39卷 185-192页

作者： Hao Lv Ge Zhang Zhi-Mu Hu Qing-song Chu jiu-Xiang Wang Ting Jiang Department of Orthopaedics The First Affiliated Hospital of Anhui University of Chinese MedicineHefei230031 China Graduate School of Anhui University of Chinese Medicine Hefei230012 China Department of Geriatrics The Third People's Hospital of HefeiHefei230041 China Experimental Center of Clinical Research The First Affiliated Hospital of Anhui University of Chinese MedicineHefei230031 China

Objective To investigate the causal relationships between plasma metabolites and osteoporosis via Mendelian randomization(MR)*** Bidirectional MR was used to analyze pooled data from different genome-wide association studies(GWAS)to investigate the causal relationships between plasma metabolites and *** causal effect of plasma metabolites on osteoporosis was estimated using the inverse variance weighted method,intersections of statistically significant metabolites obtained from different sources of osteoporosis-related GWAS aggregated data was determined,and then sensitivity analysis was performed on these *** between single nucleotide polymorphisms was evaluated by Cochran’s Q *** pleiotropy was assessed through the application of the MR-Egger intercept method and the MR-pRESSO *** causal effect of osteoporosis on plasma metabolites was also evaluated using the inverse variance weighted ***,pathway analysis was conducted to identify potential metabolic pathways involved in the regulation of *** After primary analysis and a series of sensitivity analyses,77 and 61 plasma metabolites were identified as having a causal relationship with osteoporosis from the GWAS data in the GCST90038656 and GCST90044600 datasets,*** common metabolites were identified via intersection.X-13684 levels(GCST90038656:OR=0.999,95%CI,0.998-1.000,p=0.004;GCST90044600(OR=0.834,95%CI,0.700-0.993,p=0.042),and the glucose-to-maltose ratio(GCST90038656:OR=0.998,95%CI,0.997-1.000,p=0.025;GCST90044600:OR=0.752,95%CI,0.576-0.981,p=0.036)were negatively associated with osteoporosis,whereas glycoursodeoxycholate levels(GCST90038656:OR=1.002,95%CI,1.000-1.003,p=0.032;GCST90044600:OR=1.331,95%CI,1.036-1.709,p=0.025)and arachidoylcarnitine(C20)levels(GCST90038656:OR=1.001,95%CI,1.000-1.003,p=0.039;GCST90044600:OR=1.237;95%CI,1.008-1.518,p=0.042)were positively associated with ***

关键词： osteoporosis plasma metabolites mendelian randomization bidirectional analysis

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低阶煤基炭材料研究进展

新型炭材料（中英文） 2024年第4期39卷 611-632页

作者：宋文革曾红久王斌黄显虹李晓明孙国华国能神东煤炭集团有限责任公司内蒙古鄂尔多斯017200 中国神华能源股份有限公司神东煤炭分公司陕西神木719315 中国科学院山西煤炭化学研究所中国科学院炭材料重点实验室山西太原030001

低阶煤因其储量丰富、富含多环芳烃有机物、含碳量高、成本低等特点,被认为是炭材料的优质前驱体。然而,由于不同低阶煤的灰分、微观结构、界面的差异,导致了煤基炭材料结构、性能难以有效调控的问题。近年来,研究人员提出了低阶煤基炭... 详细信息

低阶煤因其储量丰富、富含多环芳烃有机物、含碳量高、成本低等特点,被认为是炭材料的优质前驱体。然而,由于不同低阶煤的灰分、微观结构、界面的差异,导致了煤基炭材料结构、性能难以有效调控的问题。近年来,研究人员提出了低阶煤基炭材料微观结构、表界面调控的有效方法。本文重点总结了低阶煤制备吸附活性炭、电容炭、硬炭、石墨和纳米炭材料的差异化策略,进一步讨论了煤种和工艺对煤基炭材料的微观结构、界面特性和官能团种类等的影响。同时介绍了煤基炭材料在吸附、超级电容器和碱金属电池中的应用。最后,展望了低级煤基炭材料未来研究的方向和挑战。

关键词：低阶煤电容炭硬炭煤基石墨活性炭

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IGCT门极驱动装置杂散电感测量与改进

电力电子技术 2024年第9期58卷 111-113,117页

作者：宋阳宋久旭刘健刘昕西安石油大学电子工程学院陕西西安710065

集成门极换流晶闸管(IGCT)的关断能力高度依赖其门极驱动单元的换流能力,为了提高其换流能力,限制杂散电感是关键。分析了影响关断电路中杂散电感的主要因素,提出了抑制和减小电路杂散电感的方法,采用此方法将关断回路总杂散电感从13.6... 详细信息

集成门极换流晶闸管(IGCT)的关断能力高度依赖其门极驱动单元的换流能力,为了提高其换流能力,限制杂散电感是关键。分析了影响关断电路中杂散电感的主要因素,提出了抑制和减小电路杂散电感的方法,采用此方法将关断回路总杂散电感从13.6 nH降低到4.7 nH,最终达到3.5 nH,使门极电流峰值和上升率分别达到-6 120 A和-5 720 A/μs,满足4 500 V/4 000 A IGCT的驱动电路关断能力的要求。对环绕型关断电路的杂散电感进行详细划分和测量,针对采集的各部分电感分布量进行分析,结果对更高电流容量IGCT驱动电路板的设计有重要的参考价值。

关键词：集成门极换流晶闸管杂散电感驱动电路

3003铝合金双层盒形壳体液压成形工艺及壁厚控制

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塑性工程学报 2024年第7期31卷 21-28页

作者：王睿乾宋彬杨展奇徐旻昊贺久强刘伟哈尔滨工业大学材料科学与工程学院黑龙江哈尔滨150001 哈尔滨工业大学实验室与设备管理处黑龙江哈尔滨150001

为解决铝合金双层盒形壳体拉深成形开裂难题,提出了盒形件充液拉深与液压胀形复合成形工艺。通过工艺仿真研究了压边力、液室压力及胀形压力对双层板盒形件成形起皱和开裂的影响,并对关键工艺参数进行了优化。结果表明:充液拉深工艺有... 详细信息

为解决铝合金双层盒形壳体拉深成形开裂难题,提出了盒形件充液拉深与液压胀形复合成形工艺。通过工艺仿真研究了压边力、液室压力及胀形压力对双层板盒形件成形起皱和开裂的影响,并对关键工艺参数进行了优化。结果表明:充液拉深工艺有助于改善壁厚分布,合理的液室压力能够减少内外层板壁厚减薄,但液室压力过大会导致板料初期反胀过度引发减薄甚至破裂,在一定的胀形压力下外板能够实现贴模成形。通过实验研究了复合工艺对铝合金双层盒形壳体成形的影响,最大壁厚减薄率小于15%。该复合工艺为铝合金双层壳体零件成形提供了新方法。

关键词：盒形件双层板液压成形有限元模拟壁厚控制