检索结果-南通市图书馆

An integrated machine-process-controller model to predict milling surface topography considering vibration suppression

在线全文

学校读者我要写书评

暂无评论

Advances in Manufacturing 2022年第3期10卷 443-458页

作者： Miao-Xian Guo Jin liu li-mei pan Chong-Jun Wu Xiao-Hui Jiang Wei-Cheng Guo College of Mechanical Engineering University of Shanghai for Science and TechnologyShanghai 200093People's Republic of China College of Mechanical Engineering Donghua UniversityShanghai 201620People's Republic of China

Surface topography is an important factor in evaluating the surface integrity and service performance of milling *** dynamic characteristics of the manufacturing system and machining process parameters significantly influence the machining precision and surface quality of the parts,and the vibration control method is applied in high-precision milling to improve the machine *** this study,a novel surface topography model based on the dynamic characteristics of the process system,properties of the cutting process,and active vibration control system is theoretically developed and experimentally *** dynamic characteristics of the process system consist of the vibration of the machine tool and piezoelectric ceramic clamping *** dynamic path trajectory influenced by the processing parameters and workpiece-tool parameters belongs to the property of the cutting process,while different algorithms of active vibration control are considered as controller *** milling surface topography can be predicted by considering all these factors.A series of experiments were conducted to verify the effectiveness and accuracy of the prediction model,and the results showed a good correlation between the theoretical analysis and the actual milled surfaces.

关键词： Machine-process-controller Milling surface topography Vibration suppression Prediction model

Engineering atomic Rb-N configurations to tune radical pathways for highly selective photocatalytic H2O2 synthesis coupled with biomass valorization

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 215-225页

作者： Jiaye li Shuang pan Yihuang Chen Qiong liu College of Chemistry and Materials Engineering Wenzhou University Guangdong Provincial Key Laboratory of Chemical Measurement and Emergency Test Technology (China) Institute of Analysis Guangdong Academy of Sciences (China National Analytical CenterGuangzhou)

Photocatalytic oxygen reduction for hydrogen peroxide （H2O2） synthesis presents a green and costeffective production ***,achieving highly selective H2O2synthesis remains challenging,necessitating precise control over free radical reaction pathways and minimizing undesirable oxidative ***,we report for the visible light-driven simultaneous co-photocatalytic reduction of O2to H2O2and oxidation of biomass using the atomic rubidium-nitride modified carbon nitride（CNRb）.The optimized CNRb catalyst demonstrates a record photoreduction rate of 8.01 mM h-1for H2O2generation and photooxidation rate of 3.75 mM h-1for furfuryl alcohol to furoic acid,achieving a remarkable solar-to-chemical conversion （SCC） efficiency of up to 2.27%.Experimental characterizations and DFT calculation disclosed that the introducing atomic Rb–N configurations allows for the high-selective generation of superoxide radicals while suppressing hydroxyl free radical *** is because the Rb–N serves as the new alternative site to perceive a stronger connection position for O2adsorption and reinforce the capability to extract protons,thereby triggering a high selective redox product *** study holds great potential in precisely regulating reactive radical processes at the atomic level,thereby paving the way for efficient synthesis of H2O2coupled with biomass valorization.

关键词： Atomic economy Radical pathway regulation Rubidium atom coordination Biomass valorization

MIMO-OFDM系统中基于RAMP及其改进的稀疏信道估计算法

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

北京理工大学学报 2017年第3期37卷 297-303页

作者：高飞梅力丹潘红云薛艳明北京理工大学信息与电子学院北京100081

研究了在MIMO-OFDM系统中的稀疏信道估计问题.将正则化稀疏度自适应匹配追踪算法(RAMP)运用到MIMO-OFDM稀疏信道估计中,并对该算法的迭代结束条件加以改进,取残差的能量之差小于设定的阈值来终止迭代过程,更加准确地估计出信道稀疏度,... 详细信息

研究了在MIMO-OFDM系统中的稀疏信道估计问题.将正则化稀疏度自适应匹配追踪算法(RAMP)运用到MIMO-OFDM稀疏信道估计中,并对该算法的迭代结束条件加以改进,取残差的能量之差小于设定的阈值来终止迭代过程,更加准确地估计出信道稀疏度,进而提高了稀疏信道的估计精度.仿真结果表明,在MIMO-OFDM系统中,相比RAMP算法与稀疏度自适应匹配追踪算法(SAMP),改进算法能够获得更好的MSE性能,在不需要稀疏度的前提下达到了与正交匹配追踪算法(OMP)算法相似的MSE性能.

关键词：压缩感知 MIMO-OFDM 稀疏信道估计 RAMP算法

Cloning and characterization of human IC53-2, a novel CDK5 activator binding protein

在线全文

学校读者我要写书评

暂无评论

Cell Research 2003年第2期13卷 83-91页

作者： YI Hu XIE, XIANG Huo HE, YUN TIAN TANG, JIN JUN li, Zm mei pan, WEN XIN QIN, DA FANG WAN , JIAN REN GU,1 State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Shanghai 200032, China 2Peopele’s Hospital of Guangxi Zhuang Autonomous Region, Nanning 530021, China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China 2Peopele s Hospital of Guangxi Zhuang Autonomous Region Nanning 530021 China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China 1State Key Laboratory of Oncogenes and Related Genes Shanghai Cancer Institute Shanghai 200032 China

We have identified IC53-2, a human homologue of the rat C53 gene from a human placenta cDNA library (GeneBank Accession ***217982). IC53-2 can bind to the CDK5 activator p35 by in vitro association assay. IC53-2 is mapped to human chromosome 17q21.31. The IC53-2 transcript is highly expressed in kidney, liver, skeletal muscle and placenta. It is abundantly expressed in SMMC-7721, C-33A, 3AO, A431 and MCF-7 cancer cell lines by RT-PCR assay. Stable transfection of IC53-2 cDNA into the hepatocellular carcinoma SMMC-7721 cell remarkably stimulates its growth in vitro. The above results indicate that IC53-2 is a novel human gene, which may be involved in the regulation of cell proliferation.

关键词： IC53-2 CDK5 p35 hepatocellular carcinoma proliferation.

Deciphering the role of mtH2O2 in hepatic ischemia-reperfusion injury mechanisms with low-background super-resolution fluorogenic probe

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 297-307页

作者： Bin Fang limin Wang Haoqin li Jiaxin Zhang Yang Ding pan pan li Bo Peng Hua Bai lin li Frontiers Science Center for Flexible Electronics Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials &Engineering Northwestern Polytechnical University Institute of Flexible Electronics (IFE Future Technologies) Xiamen University

Hepatic ischemia-reperfusion injury（HIRI） is characterized by mitochondrial dysfunction and oxidative stress. Monitoring mitochondrial hydrogen peroxide（mtH2O2） levels in real-time through super-resolution imaging is crucial for elucidating its distribution in live cells and its mechanism of action during HIRI. However, low-background fluorogenic probes have been overlooked in the context of super-resolution imaging. In this study, we developed a low-background fluorogenic probe（MitoWG） with the potential for super-resolution morphology-correlated mitochondrial identification to track the fluctuates of mtH2O2in HIRI. Activation of the desirable fluorescence properties of the probe by mtH2O2was confirmed using structural illumination microscopy（SIM）, enabling high-quality mitochondrial imaging with exceptional specificity and *** in mtH2O2levels were successfully observed in both cellular and rat models of HIRI. Furthermore, we associated the decline in mitochondrial redox homeostasis with accelerated mtH2O2production during HIRI, which triggered mitophagy deficiency and led to cell death. In conclusion, Mito-WG possesses excellent photophysical and low-background properties for SIM imaging, making it a promising tool for mtH2O2tracking in HIRI research and clinical diagnosis.

关键词：

同方期刊数据库

Defect Engineering:Can it Mitigate Strong Coulomb Effect of Mg^(2+)in Cathode Materials for Rechargeable Magnesium Batteries?

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing Fan Ruimin li Xin Zhang Wanyu Zhao Zhenghui pan Xiaowei Yang School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China School of Chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China School of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage ***,the sluggish diffusion kinetics of bivalent Mg^(2+)in the host material,related to the strong Coulomb effect between Mg^(2+)and host anion lattices,hinders their further development toward practical *** engineering,regarded as an effective strategy to break through the slow migration puzzle,has been validated in various cathode materials for *** this review,we first thoroughly understand the intrinsic mechanism of Mg^(2+)diffusion in cathode materials,from which the key factors affecting ion diffusion are further ***,the positive effects of purposely introduced defects,including vacancy and doping,and the corresponding strategies for introducing various defects are *** applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also ***,the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish diffusion kinetic Defect engineering Cathode materials Ion migration

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao li Yangfei Chen Yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

在线全文

学校读者我要写书评

暂无评论

分布式多传感器信息融合仿真系统设计与实现

系统仿真学报 2009年第21期21卷 6950-6953页

作者：吴俊杨峰屈立安程咏梅潘泉西北工业大学自动化学院西安710072

针对多传感器信息融合算法仿真验证应用背景,通过系统需求分析,提出了基于HLA的分布式仿真系统结构,通过构建实体模型,生成红蓝双方的兵力,配置多种典型剧情、作战平台、传感器,实现在全局意义下验证局部信息融合算法的效果。并对系统... 详细信息

针对多传感器信息融合算法仿真验证应用背景,通过系统需求分析,提出了基于HLA的分布式仿真系统结构,通过构建实体模型,生成红蓝双方的兵力,配置多种典型剧情、作战平台、传感器,实现在全局意义下验证局部信息融合算法的效果。并对系统开发过程中的想定配置、雷达模型、传感器数据处理、软件集成进行了讨论。此项研究对于其他分布式仿真系统的设计和开发具有参考价值。

关键词：分布式仿真多传感器信息融合算法验证高层体系结构

右美托咪啶两种联合用药方案对颅脑损伤患者镇静作用及药物经济学比较研究

在线全文

学校读者我要写书评

暂无评论

中国生化药物杂志 2017年第6期37卷 158-160页

作者：李津李美珍王攀天津医科大学第二医院药学部

目的比较对颅脑损伤患者使用右美托咪啶联用丙泊酚和右美托咪啶联用咪达唑仑两种用药方式的临床疗效以及药物经济学.方法选取2015年2月-2016年9月于天津医科大学第二医院治疗的94例颅脑损伤患者,随机分为A组与B组,每组47例.A组患者给... 详细信息

目的比较对颅脑损伤患者使用右美托咪啶联用丙泊酚和右美托咪啶联用咪达唑仑两种用药方式的临床疗效以及药物经济学.方法选取2015年2月-2016年9月于天津医科大学第二医院治疗的94例颅脑损伤患者,随机分为A组与B组,每组47例.A组患者给予右美托咪啶联合丙泊酚药物治疗,B组患者给予右美托咪啶联合咪达唑仑药物治疗,除药物治疗方式外其他用药及护理方式相同,使躁动评分（SAS）维持在2-4的标准状态,观察所有患者的镇静效率、平均动脉压（MAP）、呼吸速率（RR）、心率（HR）、血氧饱和度（SpO2）、动脉二氧化碳分压（PaCO2）、中心静脉压（CVP）和格拉斯哥昏迷程度评分（GCS）的变化,同时比较两种方案的药物经济学.结果右美托咪啶的两种联合用药方案均能使患者达到预计的镇静镇痛评分,两种用药方式的镇静效率无统计学差异;2组患者治疗前后的血氧饱和度（SpO2）、动脉二氧化碳分压（PaCO2）、中心静脉压（CVP）及格拉斯哥昏迷程度评分（GCS）均无统计学差异（P〉0.05）,但患者治疗前后的平均动脉压（MAP）、呼吸频率（R）及心率（HR）均有明显下降,差异具有统计学意义（P〈0.05）;右美托咪啶联用咪达唑仑的用药方案相较于右美托咪啶联合丙泊酚的用药方案更为经济,且差异具有统计学意义（P〈0.05）.结论对于颅脑损伤患者使用右美托咪啶联合丙泊酚和右美托咪啶联合咪达唑仑两种用药方案均可取得良好的镇静效果,但丙泊酚联用组相较咪达唑仑联用组对呼吸系统及循环系统有更好的抑制作用,同时在药物经济学角度,咪达唑仑联用组比丙泊酚联用组更为经济,患者承担费用更低.

关键词：右美托咪啶丙泊酚咪达唑仑颅脑外伤镇静作用