检索结果-南通市图书馆

Confined Mn^(2+) enables effective aerobic oxidation catalysis

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2024年第5期67卷 1545-1553页

作者： Desheng Yuan Sicong Ma Xiao Kong Chi Zhang Lin Chen Chengsheng Yang Lihua Wang zhen Liu Lin Ye Yongmei Liu Rui Ma Zhi-Pan Liu Yifeng Zhu Yong Cao Xinhe Bao Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsCollaborative Innovation Center of Chemistry for Energy MaterialsFudan UniversityShanghai 200438China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China school of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Institute of Advanced Fluorine-Containing Materials Zhejiang Normal UniversityJinhua 321004China State Key Laboratory of Catalysis National Laboratory for Clean EnergyCollaborative Innovation Center of Chemistry for Energy MaterialsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China

Effective and mild activation of O_(2) is essential but challenging for aerobic oxidation. In heterogeneous catalysis, high-valence manganese oxide(e.g., +4) is known to be active for the oxidation, whereas divalent MnO is ineffective due to its limited capacity to supply surface oxygen and its thermodynamically unstable structure when binding O_(2) in reaction conditions. Inspired by natural enzymes that rely on divalent Mn^(2+), we discovered that confining Mn^(2+) onto the Mn_(2)O_(3) surface through a dedicated calcination process creates highly active catalysts for the aerobic oxidation of 5-hydroxymethylfurfural, benzyl alcohol, and *** Mn_(2)O_(3)-confined Mn^(2+) is undercoordinated and efficiently mediates O_(2) activation, resulting in 2–3 orders of magnitude higher activity than Mn_(2)O_(3) alone. Through low-temperature infrared spectroscopy, we distinguished low-content Mn^(2+) sites at Mn_(2)O_(3) surface, which are difficult to be differentiated by X-ray photoelectron spectroscopy. The combination of in-situ energydispersive X-ray absorption spectroscopy and X-ray diffraction further provides insights into the formation of the newly identified active Mn^(2+) sites. By optimizing the calcination step, we were able to increase the catalytic activity threefold *** finding offers promising frontiers for exploring active oxidation catalysts by utilizing the confinement of Mn^(2+)and oftenignored calcination skills.

关键词： confinement catalysis manganese oxide aerobic oxidation divalent Mn^(2+) operando spectroscopies

Revisit of the Faddeev Model in Dimension Two

在线全文

学校读者我要写书评

暂无评论

Chinese Annals of Mathematics,Series B 2022年第5期43卷 797-818页

作者： Shijie DONG zhen lei SUSTech International Center for Mathematics Department of MathematicsSouthern University of Science and TechnologyShenzhen 518055China school of mathematical sciences Shanghai Center for Mathematical SciencesFudan UniversityShanghai 200433China

The Faddeev model is a fundamental model in relativistic quantum field theory used to model elementary particles. The Faddeev model can be regarded as a system of non-linear wave equations with both quasi-linear and semi-linear non-linearities, which is particularly challenging in two space dimensions. A key feature of the system is that there exist undifferentiated wave components in the non-linearities, which somehow causes extra difficulties. Nevertheless, the Cauchy problem in two space dimenions was tackled by lei-Lin-Zhou(2011) with small, regular, and compactly supported initial data, using Klainerman’s vector field method enhanced by a novel angular-radial anisotropic *** the present paper, the authors revisit the Faddeev model and remove the compactness assumptions on the initial data by lei-Lin-Zhou(2011). The proof relies on an improved L2norm estimate of the wave components in Theorem 3.1 and a decomposition technique for non-linearities of divergence form.

关键词： Faddeev model in R^(1+2) Global existence Null condition

Injectable Nanorobot-Hydrogel Superstructure for Hemostasis and Anticancer Therapy of Spinal Metastasis

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2024年第12期16卷 59-80页

作者： Qing Chen Miao Yan Annan Hu Bing Liang Hongwei Lu lei Zhou Yiqun Ma Chao Jia Dihan Su Biao Kong Wei Hong Libo Jiang Jian Dong Department of Orthopaedic Surgery Zhongshan HospitalFudan UniversityShanghai 200032People’s Republic of China Department of Chemistry Fudan UniversityShanghai 200438People’s Republic of China Department of Surgery Yong Loo Lin School of MedicineNational University of Singapore1E Kent Ridge RoadSingapore 119228Singapore Department of Geriatrics and Gerontology Huadong HospitalFudan UniversityShanghai 200438People’s Republic of China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200438People’s Republic of China Department of Orthopaedic Surgery Zhongshan Hospital Wusong Branch Fudan UniversityShanghai 200940People’s Republic of China

Surgery remains the standard treatment for spinal ***,uncontrolled intraoperative bleeding poses a significant challenge for adequate surgical resection and compromises surgical *** this study,we develop a thrombin(Thr)-loaded nanorobothydrogel hybrid superstructure by incorporating nanorobots into regenerated silk fibroin nanofibril *** superstructure with superior thixotropic properties is injected percutaneously and dispersed into the spinal metastasis of hepatocellular carcinoma(HCC)with easy bleeding characteristics,before spinal surgery in a mouse *** near-infrared irradiation,the self-motile nanorobots penetrate into the deep spinal tumor,releasing Thr in a controlled ***-induced thrombosis effectively blocks the tumor vasculature and reduces bleeding,inhibiting tumor growth and postoperative recurrence with Au nanorod-mediated photothermal *** minimally invasive treatment platform provides a novel preoperative therapeutic strategy for HCC spinal metastasis effectively controlling intraoperative bleeding and tumor growth,with potentially reduced surgical complications and enhanced operative outcomes.

关键词： Silk fibroin Nanofibril hydrogels Nanorobots Thrombin Spinal metastasis

打通数据“宝瓶口”:公共数据资源供给的路径和目的

在线全文

学校读者我要写书评

暂无评论

图书情报知识 2024年第2期41卷 23-27页

作者：郑磊复旦大学国际关系与公共事务学院数字与移动治理实验室上海200433

公共数据只有在市场和社会上得到充分供给和高效利用,才能最大程度地释放出其价值红利。本文基于实地调研对公共数据资源的供给路径和目的进行了初步探讨。在供给路径上,公共数据开放和授权运营两种公共数据供给方式各有其适用的数据类... 详细信息

公共数据只有在市场和社会上得到充分供给和高效利用,才能最大程度地释放出其价值红利。本文基于实地调研对公共数据资源的供给路径和目的进行了初步探讨。在供给路径上,公共数据开放和授权运营两种公共数据供给方式各有其适用的数据类型和利用场景,需要协同推进,发挥各自所长,而不应相互取代或挤压空间。在供给目的上,应着力使公共数据尽最大可能赋能于市场和社会,创造出更全面和长远的价值,而不应只着眼于公共数据在短期内和局部范围内实现了多少利益“变现”。

关键词：公共数据供给数据开放授权运营

“12345”热线诊疗投诉特征、产生原因及改进建议分析——以江苏省某口腔医院为例

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

南京中医药大学学报（社会科学版） 2024年第3期25卷 191-197页

作者：马震杨毅王磊南京大学医学院附属口腔医院江苏南京210018 复旦大学公共卫生学院上海200032

正视口腔患者的合理诉求,及时、有效地处理患者的诊疗投诉,关系到口腔医疗服务质量提升与患者就医体验改善,具有重要意义。通过对江苏省某三甲口腔专科医院2019-2022年“12345”热线受理的1 778例诊疗投诉进行分析发现,诊疗投诉数和每... 详细信息

正视口腔患者的合理诉求,及时、有效地处理患者的诊疗投诉,关系到口腔医疗服务质量提升与患者就医体验改善,具有重要意义。通过对江苏省某三甲口腔专科医院2019-2022年“12345”热线受理的1 778例诊疗投诉进行分析发现,诊疗投诉数和每万人次诊疗投诉数均逐年上升,单月诊疗投诉数受到疫情防控政策影响呈现波动趋势,患者投诉内容主要集中在工作流程、疫情防控、医疗质量、停诊问题等方面。导致上述问题的原因主要包括突发公共卫生事件的影响、医疗资源配置不合理、医务人员医疗技术不足与职业倦怠、医患双方的认知存在差异、投诉处理机制与医疗纠纷管理不适配。为此,建议提升突发公共卫生事件的处置能力;合理配置医疗资源,持续优化诊疗流程;提升医疗服务水平,积极缓解职业倦怠;消除医患认知差异,推动共同决策模式构建;优化投诉管理机制,避免医患矛盾加剧。

关键词： “12345”热线诊疗投诉口腔医院医患关系医疗质量医疗资源

On scaling invariance and type-Ⅰ singularities for the compressible Navier-Stokes equations

在线全文

学校读者我要写书评

暂无评论

Science china Mathematics 2019年第11期62卷 2271-2286页

作者： zhen lei Zhouping Xin school of mathematical sciences LMNS and Shanghai Key Laboratory for Contemporary Applied MathematicsFudan UniversityShanghai 200433China The Institute of mathematical sciences and Department of Mathematics The Chinese University of Hong KongHong KongChina

We find a new scaling invariance of the barotropic compressible Navier-Stokes equations. Then it is shown that type-Ⅰ singularities of solutions with■ can never happen at time T for all adiabatic number γ 1. Here κ > 0 does not depend on the initial *** is achieved by proving the regularity of solutions under■ This new scaling invariance also motivates us to construct an explicit type-Ⅱ blowup solution for γ > 1.

关键词： type-Ⅰ singularity compressible Navier-Stokes equations scaling invariance blowup rate

A review of ToF-based LiDAR

在线全文

学校读者我要写书评

暂无评论

Journal of Semiconductors 2024年第10期45卷 7-19页

作者： Jie Ma Shenglong Zhuo lei Qiu Yuzhu Gao Yifan Wu Ming Zhong Rui Bai Miao Sun Patrick Yin Chiang The College of Electronics and Information Engineering Tongji UniversityShanghai 200092China State Key Laboratory of ASIC&System Fudan UniversityShanghai 201203China school of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore Lyne Technologies Shanghai 201203China

In recent years,propelled by the rapid iterative advancements in digital imaging technology and the semiconductor industry,encompassing microelectronic design,manufacturing,packaging,and testing,time-of-flight(ToF)-based imaging systems for acquiring depth information have garnered considerable attention from both academia and *** technology has emerged as a focal point of research within the realm of 3D *** to its relatively straightforward principles and exceptional performance,ToF technology finds extensive applications across various domains including human−computer interaction,autonomous driving,industrial inspection,medical and healthcare,augmented reality,smart homes,and 3D reconstruction,among ***,the increasing maturity of ToF-based LiDAR systems is evident in current *** paper comprehensively reviews the fundamental principles of ToF technology and LiDAR systems,alongside recent research *** elucidates the innovative aspects and technical challenges encountered in both transmitter(TX)and receiver(RX),providing detailed discussions on corresponding ***,the paper explores prospective avenues for future research,offering valuable insights for subsequent investigations.

关键词： time of flight light detection and ranging transmitter receiver

火焰法与喷雾干燥法共合成固体氧化物燃料电池阴极La_(0.6)Sr_(0.4)CoO_(3–δ)–Ce_(0.8)Gd_(0.2)O_(2–δ)的微观结构与性能分析

在线全文

学校读者我要写书评

暂无评论

硅酸盐学报 2024年第6期52卷 1810-1819页

作者：王天齐相龙凯高展张毅然倪娜屠恒勇朱磊黄震上海交通大学国家电投智慧能源创新学院上海200240 上海交通大学机械与动力工程学院上海200240

实现阴极结构的纳米化以提升电极三相界面长度,是提升固体氧化物燃料电池(SOFC)性能的有效途径。基于火焰喷雾热解法和喷雾干燥法,分别一步法合成纳米级和亚微米级的La_(0.6)Sr_(0.4)CoO_(3-δ)-Ce_(0.8)Gd_(0.2)O_(2-δ)复相材料。将2... 详细信息

实现阴极结构的纳米化以提升电极三相界面长度,是提升固体氧化物燃料电池(SOFC)性能的有效途径。基于火焰喷雾热解法和喷雾干燥法,分别一步法合成纳米级和亚微米级的La_(0.6)Sr_(0.4)CoO_(3-δ)-Ce_(0.8)Gd_(0.2)O_(2-δ)复相材料。将2种粒径范围材料按照不同质量比混合,制成氧化钇部分稳定氧化锆电解质支撑的固体氧化物燃料电池的阴极,并系统分析电池性能与结构特征。结果表明,喷雾干燥合成材料与火焰喷雾热解合成材料的质量比为70:30时,SOFC电化学性能最优,850℃时最大功率密度为0.47 W/cm^(2),面电阻为0.62Ω·cm^(2),相应的欧姆阻抗和极化阻抗为0.36Ω·cm^(2)和0.26Ω·cm^(2)。实验证明,混合不同粒径颗粒制成的SOFC阴极,可有效构建电子–离子导通网络,并形成更多的三相界面和反应活性位点,从而获得较好的电化学性能。本研究为固体氧化物燃料电池阴极材料微观结构和性能优化提供了新的思路。

关键词：固体氧化物燃料电池火焰喷雾热解法喷雾干燥法阴极弛豫时间分布法

Suppression of intervalley scattering and enhanced phonon anharmonic interactions in 2D Bi_(2)TeSe_(2):Crystal-field symmetry and band convergence

在线全文

学校读者我要写书评

暂无评论

Journal of Materiomics 2024年第2期10卷 386-395页

作者： lei Peng Ao Wu Yujie Xia Haotian Zhang Yuting Yang Hezhu Shao Ying Chen Juan Zhang Le Shu Heyuan Zhu Yuxiang zheng Hao Zhang school of Information Science and Technology Department of Optical Science and EngineeringFudan UniversityShanghai 200433China College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035China Department of Light Sources and Illuminating Engineering Fudan UniversityShanghai 200433China Yiwu Research Institute of fudan university Yiwu 322000China

The electron-phonon(el-ph)and phonon-phonon interactions play a key role in determining electronic and thermal transport properties,respectively,in promising two-dimensional(2D)semiconductor *** this study,we investigated el-ph interactions using Wannier-Fourier interpolation method and renormalized phonon scattering considering finite-temperature effects in Bi_(2)TeSe_(2)*** re-sults show that the optical phonon modes dominate the carrier scattering,where level repulsion induced by crystal field splitting and spin-orbit coupling(SOC)effect effectively suppresses intervalley scattering,leading to high hole ***,the strong anharmonicity in Bi_(2)TeSe_(2)monolayer results in the temperature-dependent softening of its optical phonons,along with a corresponding variation in interatomic force constants(IFCs).As a result,the lattice thermal conductivity is remarkably low and exhibits weak temperature ***,the predicted dimensionless thermoelectric figure of merit exceeds unity in the range of 200-800 K,indicating the potential of Bi_(2)TeSe_(2)monolayer for thermoelectric *** work provides new insights into the elimination of intervalley scat-tering by crystal field splitting and SOC effects,and paves the way for the evaluation of thermoelectric properties of materials with complex scattering mechanisms and strong anharmonicity.

关键词： El-ph interactions Crystal field splitting Spin-orbit coupling Intervalley scattering Renormalized phonon scattering