检索结果-南通市图书馆

International Journal of Minerals,Metallurgy and Materials 2016年第6期23卷 698-703页

作者： Tai-he Wang wei-jia song Rong Li Qiang Zhen Nano-Science and Technology Research Center Shanghai University Materials Science and Engineering College Shanghai University

Fluorite Ce0.8Sm0.2O2-δ（SDC） nanopowder with a crystallite size of 15 nm was synthesized by a co-precipitation method. An SDC porous layer was coated onto a BaCo0.7Fe0.2Nb0.1O3-δ（BCFN） mixed conductor to improve its oxygen transport behavior. The results show that the SDC-coated BCFN membrane exhibits a remarkably higher oxygen permeation flux（JO2） than the uncoated BCFN in the partial oxidation of coke oven gas（COG）. The maximum JO2 value of the SDC-coated BCFN is 18.28 mL ·min^-1·cm^-2 under a COG/air flux of 177 mL ·min^-1/353 mL ·min^-1 at 875℃ when the thickness of the BCFN membrane is 1 mm; this JO2 value is 23% higher than that of the uncoated BCFN membrane. This enhancement is likely because of the higher oxygen ionic conductivity of SDC, which supplies oxygen vacancies and accelerates oxygen exchange on the membrane/coating layer/gas three-phase boundary.

关键词： chemical stability surface coating oxygen permeable membrane coke oven gas

Discussion on Relationship Between Meridians and Viscera of Decreased Ovarian Reserve from the Perspective of"Preventive Treatment of Disease"by Acupuncture

在线全文

学校读者我要写书评

暂无评论

World Journal of Traditional Chinese Medicine 2023年第2期9卷 111-122页

作者： Si-An Pan Zhi-Miao Murong Yi-Lin Zhu jia-wei song Xiao-Rong Chang Yu Liu Zeng-Hui Yue Department of Professional Acupuncture and Moxibustion College of AcupunctureMoxibustion and TuinaHunan University of Chinese MedicineChangshaHunanChina

Based on extensive historical data,clinical experience,and modern scientific research,we discuss the relationship between meridians and viscera of decreased ovarian reserve(OR)from the perspective of"preventive treatment of disease"by *** is believed that the endogenous protection mechanism of acupuncture in"preventive treatment of disease"lies in harmonizing Yin and Yang and dredging meridians;stimulating righteousness and rejecting the evil outside;preventing disease;co-cultivating body and spirit,and regulating *** incidence ofOR dysfunction is closely related to the uterus-related meridians and *** mechanism of acupuncture treatment of OR dysfunction may be related to reproductive endocrine hormone levels,ovarian tissue morphology,immune system,granulosa cell apoptosis,and related signal transduction *** clinical effect of acupuncture treatment of diminished OR is reflected in improving menstruation and ovulation;improving OR function,promoting pregnancy;improving local ovarian microenvironment;improving negative emotions,improving quality of life,and thus affecting pregnancy *** article summarizes the mechanism of action and clinical effect of acupuncture in the treatment of decreased OR function based on recent findings,analyzes the advantages and disadvantages of acupuncture in the treatment of disease,and provides the rationale for the clinical application of acupuncture in the treatment of decreased OR function.

关键词： Acupuncture ovarian reserve dysfunction preventive treatment of disease theoretical discussion

Passive activity enhances residual control ability in patients with complete spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2337-2347页

作者： Yanqing Xiao Mingming Gao Zejia He jia Zheng Hongming Bai jia-Sheng Rao Guiyun song wei song Xiaoguang Li Beijing Key Laboratory for Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringBeihang UniversityBeijingChina Department of Rehabilitation Evaluation China Rehabilitation Research CenterBeijingChina Cardiac Center Beijing Children’s HospitalCapital Medical UniversityBeijingChina The State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijingChina Department of Rehabilitation Engineering China Rehabilitation Science InstituteBeijingChina

Patients with complete spinal cord injury retain the potential for volitional muscle activity in muscles located below the spinal injury ***,because of prolonged inactivity,initial attempts to activate these muscles may not effectively engage any of the remaining neurons in the descending pathway.A previous study unexpectedly found that a brief clinical round of passive activity significantly increased volitional muscle activation,as measured by surface *** this study,we further explored the effect of passive activity on surface electromyographic signals during volitional control tasks among individuals with complete spinal cord *** patients with chronic complete thoracic spinal cord injury were *** electromyography data from eight major leg muscles were acquired and compared before and after the passive activity *** results indicated that the passive activity led to an increased number of activated volitional muscles and an increased frequency of *** the cumulative root mean square of surface electromyography amplitude for volitional control of movement showed a slight increase after passive activity,the difference was not statistically *** findings suggest that brief passive activity may enhance the ability to initiate volitional muscle activity during surface electromyography tasks and underscore the potential of passive activity for improving residual motor control among patients with motor complete spinal cord injury.

关键词： complete spinal cord injury cycle training epidural electrical stimulation motor training passive activity physiological state spinal cord circuit surface electromyography volitional control task

在线全文

学校读者我要写书评

暂无评论

基于随机森林的航天器电信号多分类识别方法

北京航空航天大学学报 2017年第9期43卷 1773-1778页

作者：兰巍贾素玲宋世民李可北京航空航天大学经济管理学院北京100083 中国空间技术研究院北京100194 北京航空航天大学航空科学与工程学院北京100083

针对航天器电特性信号数据存在数据量大、特征维数高、计算复杂度大和识别率低等问题,提出基于主成分分析(PCA)的特征提取方法和随机森林(RF)算法,对原始数据进行降维,提高计算效率和识别率,实现对航天器电信号数据的快速、准确识别分... 详细信息

针对航天器电特性信号数据存在数据量大、特征维数高、计算复杂度大和识别率低等问题,提出基于主成分分析(PCA)的特征提取方法和随机森林(RF)算法,对原始数据进行降维,提高计算效率和识别率,实现对航天器电信号数据的快速、准确识别分类。随机森林算法在处理高维数据上具有优越的性能,但是考虑到时间复杂度问题,利用主成分分析方法对数据进行压缩和降维,在保证准确率的同时提高了计算效率。实验结果表明:与其他算法相比,针对航天器电特性信号数据,本文方法在准确率、计算效率和稳定性等方面均显示出优异的性能。

关键词：航天器电信号识别主成分分析(PCA) 多分类随机森林(RF)

小学教育专业本科课程设置问题及对策——以三所师范大学为例

在线全文

学校读者我要写书评

暂无评论

教育理论与实践 2017年第9期37卷 39-41页

作者：吕卫平宋佳山西师范大学教师教育学院山西临汾040001

通过对首都师范大学、天津师范大学和山西师范大学小学教育专业人才培养方案的分析表明,目前小学教育专业仍存在课程分类界限模糊、课程设置不全面、课程比重不均衡和课程内容欠整合等问题。高等师范院校应明确课程定位、完善课程体系... 详细信息

通过对首都师范大学、天津师范大学和山西师范大学小学教育专业人才培养方案的分析表明,目前小学教育专业仍存在课程分类界限模糊、课程设置不全面、课程比重不均衡和课程内容欠整合等问题。高等师范院校应明确课程定位、完善课程体系、协调课程比重和统整课程内容,完善小学教育专业本科课程建设。

关键词：小学教育专业本科课程设置课程体系课程内容课程建设

Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao Peng Yuefeng song Ihar Razanau Juanxiu Xiao wei Xiao Di Hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Methane Electrochemical conversion Reaction mechanism Catalyst design Electrode Electrocatalysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

多焦点人工晶状体植入的研究进展

国际眼科杂志 2022年第10期22卷 1658-1661页

作者：陈海威刘冬梅毕宏生李洋宋佳蔚山东中医药大学附属眼科医院山东中医药大学眼科研究所山东省济南市250002

白内障是导致患者视力下降乃至失明的主要原因之一,手术是治疗白内障确切有效的手段。随着科学技术的进步,传统的复明性白内障手术逐渐过渡到屈光性白内障手术。各种屈光性人工晶状体也应运而生,传统的单焦点人工晶状体(single focus in... 详细信息

白内障是导致患者视力下降乃至失明的主要原因之一,手术是治疗白内障确切有效的手段。随着科学技术的进步,传统的复明性白内障手术逐渐过渡到屈光性白内障手术。各种屈光性人工晶状体也应运而生,传统的单焦点人工晶状体(single focus intraocular lens, SIOL)不再是患者的唯一选择,多焦点人工晶状体(multifocal intraocular lens, MIOL)越来越被患者接受和认可。本文对现有的多焦点人工晶状体进行了归纳总结,通过分类列举,简述不同类型多焦点人工晶状体的多种特点及评估患者术后临床效果的方法,以期为眼科医生提供参考。

关键词：白内障单焦点人工晶状体多焦点人工晶状体

Linux下AFDX端系统驱动的设计与实现

在线全文

学校读者我要写书评

暂无评论

计算机工程 2011年第21期37卷 220-221,224页

作者：何小亚翟正军贾卫松张萌西北工业大学计算机学院西安710072

为使航空全双工交换式以太网络(AFDX)兼容Linux环境,设计并实现Linux环境下AFDX端系统的驱动程序。该驱动程序基于Linux 2.***.23.1内核版本,采用PCI字符型驱动程序模式,并结合具体板卡硬件信息设计而成。测试结果表明,该驱动能使AFDX端... 详细信息

为使航空全双工交换式以太网络(AFDX)兼容Linux环境,设计并实现Linux环境下AFDX端系统的驱动程序。该驱动程序基于Linux 2.***.23.1内核版本,采用PCI字符型驱动程序模式,并结合具体板卡硬件信息设计而成。测试结果表明,该驱动能使AFDX端系统在Linux平台下正常有效工作。

关键词： AFDX端系统 Linux操作系统设备驱动中断 PCI字符驱动

MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 358-371页

作者： jiaen Wang wei Ming Longfu Chen Tianliang song Moxi Yele Hao Zhang Long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

Inhibiting SHP2 reduces glycolysis, promotes microglial M1 polarization, and alleviates secondary inflammation following spinal cord injury in a mouse model

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第3期20卷 858-872页

作者： Xintian Ding Chun Chen Heng Zhao Bin Dai Lei Ye Tao song Shuai Huang jia Wang Tao You Department of Orthopedics The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Orthopedics Provincial Hospital Affiliated to Anhui Medical UniversityHefeiAnhui ProvinceChina

Reducing the secondary inflammatory response, which is partly mediated by microglia, is a key focus in the treatment of spinal cord injury. Src homology 2-containing protein tyrosine phosphatase 2(SHP2), encoded by PTPN11, is widely expressed in the human body and plays a role in inflammation through various mechanisms. Therefore, SHP2 is considered a potential target for the treatment of inflammation-related diseases. However, its role in secondary inflammation after spinal cord injury remains unclear. In this study, SHP2 was found to be abundantly expressed in microglia at the site of spinal cord injury. Inhibition of SHP2 expression using siRNA and SHP2 inhibitors attenuated the microglial inflammatory response in an in vitro lipopolysaccharide-induced model of inflammation. Notably, after treatment with SHP2 inhibitors, mice with spinal cord injury exhibited significantly improved hind limb locomotor function and reduced residual urine volume in the bladder. Subsequent in vitro experiments showed that, in microglia stimulated with lipopolysaccharide, inhibiting SHP2 expression promoted M2 polarization and inhibited M1 polarization. Finally, a co-culture experiment was conducted to assess the effect of microglia treated with SHP2 inhibitors on neuronal cells. The results demonstrated that inflammatory factors produced by microglia promoted neuronal apoptosis, while inhibiting SHP2 expression mitigated these effects. Collectively, our findings suggest that SHP2 enhances secondary inflammation and neuronal damage subsequent to spinal cord injury by modulating microglial phenotype. Therefore, inhibiting SHP2 alleviates the inflammatory response in mice with spinal cord injury and promotes functional recovery postinjury.

关键词： apoptosis glycolysis inflammatory response microglia neurons polarization spinal cord injury Src homology 2-containing protein tyrosine phosphatase 2