检索结果-南通市图书馆

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

基于多线程技术实现Windows串行通信

微机发展 2004年第2期14卷 63-65,88页

作者：李湘江汤琛长沙理工大学计算机中心湖南长沙410076

多线程是Windows系统支持的一项十分重要的功能,特别有利于在同一程序中实现并发任务。多线程的实现可以使得各端口独立,准确地实现串行通信,从而提高串行通信中的实时性和可靠性,使程序能够适应高速的数据采集和处理。文中分析了基于Wi... 详细信息

多线程是Windows系统支持的一项十分重要的功能,特别有利于在同一程序中实现并发任务。多线程的实现可以使得各端口独立,准确地实现串行通信,从而提高串行通信中的实时性和可靠性,使程序能够适应高速的数据采集和处理。文中分析了基于Windows9x平台上的串行通信和多线程编程的原理和开发方法,阐述了基于多线程技术串行通信的实现方法。

关键词： Windows 操作系统多线程技术串行通信驱动程序

千里光通过抑制肥大细胞P2X7受体缓解炎性疼痛

在线全文

学校读者我要写书评

暂无评论

中国药理学通报 2025年第1期41卷 131-137页

作者：叶凡廖利辉唐婧玥陈佳慧成江陈功锡唐宗湘吉首大学药学院湖南吉首416000 武陵山区药用资源化学与药理湖南省高校重点实验室湖南吉首416000 南京中医药大学医学院·整合医学学院江苏南京210000

目的探讨千里光对肥大细胞P2X7受体介导的炎症性疼痛的影响。方法采用高浓度ATP诱导脚掌炎症性疼痛模型,利用免疫荧光染色技术,甲苯胺蓝染色技术,探究千里光对肥大细胞上P2X7受体是否有抑制作用。利用钙离子成像实验技术,探究千里光是... 详细信息

目的探讨千里光对肥大细胞P2X7受体介导的炎症性疼痛的影响。方法采用高浓度ATP诱导脚掌炎症性疼痛模型,利用免疫荧光染色技术,甲苯胺蓝染色技术,探究千里光对肥大细胞上P2X7受体是否有抑制作用。利用钙离子成像实验技术,探究千里光是否可以抑制小鼠腹膜肥大细胞上P2X7受体激活引起的细胞内钙离子富集。利用全细胞膜片钳技术,探究千里光是否可以抑制小鼠腹膜肥大细胞上P2X7受体激活后引起的内向电流。结果体内实验结果显示,千里光(3.9 g·kg^(-1))明显缓解ATP诱导的炎性疼痛(P<0.05);千里光(3.9 g·kg^(-1))明显抑制P2X7受体阳性肥大细胞的浸润(P<0.01);敲除肥大细胞可以消减千里光(3.9 g·kg^(-1))的镇痛效果(P=0.645)。体外实验结果显示,千里光明显抑制肥大细胞P2X7受体介导的钙离子内流(300 mg·L^(-1),P<0.05;1 g·L^(-1),P<0.01;3 g·L^(-1):P<0.01);千里光(1 g·L^(-1))明显抑制肥大细胞P2X7受体介导的内向电流(P<0.01)。结论千里光通过抑制肥大细胞P2X7受体功能缓解ATP诱导的炎性疼痛。

关键词：千里光疼痛肥大细胞 P2X7受体炎症 ATP

Microstructure evolution of Al-4Cu-Mg alloy during semi-solid treatment

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 University of Science and Technology Beijing 2007年第2期14卷 151-156页

作者： Haitao jiang Zhenli Mi Di tang Miaoquan li National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 China School of Materials Science and Engineering Northwestern Polytechnical University Xi＇an 710072 China

The microstructure of a cold-deformed Al-4Cu-Mg alloy during semi-solid treatment was investigated, which shows that grain detachment and grain spheroidization processes during the semi-solid treatment are very important to control the fabricated semi-solid microstructures. For the two different processes, the driving force comes from the external heat source and the reduction in total interfacial area, respectively. The evolution models of microstructure morphology in the two processes were presented based on microstructure observations. It can be found that these models are useful to provide a reasonable estimated critical time of the evolution of microstructure during the semi-solid treatment.

关键词： Al-4Cu-Mg alloy semi-solid microstructure morphology evolution model

A novel flexible nerve guidance conduit promotes nerve regeneration while providing excellent mechanical properties

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 2084-2094页

作者： Tong li Quhan Cheng Jingai Zhang Boxin liu Yu Shi Haoxue Wang lijie Huang Su Zhang Ruixin Zhang Song Wang Guangxu Lu Peifu tang Zhongyang liu Kai Wang Department of Orthopedics the Fourth Medical Center of Chinese PLA General HospitalBeijingChina Department of Training and Sports Medicine Characteristic Medical Center of Chinese People’s Armed Police ForceTianjinChina Medical School of Chinese PLA BeijingChina Key Laboratory of Bioactive Materials for the Ministry of Education College of Life SciencesNankai UniversityTianjinChina Department of Orthopedics Tianjin HospitalTianjinChina Department of Rehabilitation Medicine Er Quan Hospital of PAPWuxiJiangsu ProvinceChina

Autografting is the gold standard for surgical repair of nerve defects>5 mm in length;however,autografting is associated with potential complications at the nerve donor *** an alternative,nerve guidance conduits may be *** ideal conduit should be flexible,resistant to kinks and lumen collapse,and provide physical cues to guide nerve *** designed a novel flexible conduit using electrospinning technology to create fibers on the innermost surface of the nerve guidance conduit and employed melt spinning to align ***,we prepared disordered electrospun fibers outside the aligned fibers and helical melt-spun fibers on the outer wall of the electrospun fiber *** presence of aligned fibers on the inner surface can promote the extension of nerve cells along the *** helical melt-spun fibers on the outer surface can enhance resistance to kinking and compression and provide *** novel conduit promoted nerve regeneration and functional recovery in a rat sciatic nerve defect model,suggesting that it has potential for clinical use in human nerve injuries.

关键词： aligned fibers anti-kinking helical fibers nerve guidance conduit nerve regeneration peripheral nerve injury topological guidance

Highly bright and low turn-on voltage CsPbBr3 quantum dot LEDs via conjugation molecular ligand exchange

在线全文

学校读者我要写书评

暂无评论

Nano Research 2019年第1期12卷 109-114页

作者： Guopeng li Jingsheng Huang Yanqing li Jianxin tang Yang jiang School of Materials Science and Engineering Hefei University of TechnologyHefei 230009China Institute of Functional Nano&Soft Materials(FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and TechnologySoochow UniversitySuzhou 215123China

All-inorganic CsPbBr3 perovskite quantum dots (QDs) hold great promise as candidate materials for next-generation electroluminescent displays owing to their excellent optoelectronic ***,the long insulating ligands on the surface of CsPbBr3 QDs originating from the synthesis process hinder the fabrication of high-performance optoelectronic ***,an efficient ligand-exchange route is proposed with the use of perovskite-precursor-based halide ligands,including a series of phenalkylammonium bromides with a π-conjugation benzene ring and different branch *** on the ligand-exchange method,the conductivity of the CsPbBr3 QD layer is significantly improved owing to ligand shortening and the insertion of the π-conjugation benzene *** a result,high brightness (up to 12,650 cd/m2)and low tum-on voltage (as low as 2.66 V) can be realized in CsPbBr3 QD light-emitting diodes (QLEDs),leading to dramatic improvements in device performance with a current efficiency of 13.43 cd/A,power efficiency of 12.05 lm/W,and external quantum efficiency of 4.33%.

关键词： CsPbBr3 quantum dots perovskite light-emitting diodes ligand exchange π-conjugation

Advanced transition metal/nitrogen/carbon-based electrocatalysts for fuel cell applications

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

Science China Chemistry 2020年第11期63卷 1517-1542页

作者： tang tang liang Ding Zhe jiang Jin-Song Hu li-Jun Wan Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Molecular Nanostructure and NanotechnologyInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The development of advanced transition metal/nitrogen/carbon-based(M/N/C)catalysts with high activity and extended durability for oxygen reduction reaction(ORR)is critical for platinum-group-metal(PGM)free fuel cells but still remains great *** this review,we summarize the recent progress in two typical M/N/C catalysts(atomically dispersed metal-nitrogen-carbon(M-N-C)catalysts and carbon-supported metal nanoparticles with N-doped carbon shells(M@NC))with an emphasis on their potential applications in fuel *** with understanding the active sites in these two types of catalysts,the representative innovative strategies for enhancing their intrinsic activity and increasing the density of these sites are systematically *** synergistic effects of M-N-C and M@NC are subsequently discussed for those M/N/C catalysts combining both of *** translate the material-level catalyst performance into high-performance devices,we also include the recent progress in engineering the porous structure and durability of M/N/C catalysts towards efficient performance in fuel cell *** the viewpoint of industrial applications,the scale-up cost-effective synthesis of M/N/C catalysts has been lastly *** this knowledge,the challenges and perspectives in designing advanced M/N/C catalysts for potential PGM-free fuel cells are proposed.

关键词： electrocatalysis ORR metal-nitrogen-carbon M@NC fuel cells oxygen reduction

在线全文

学校读者我要写书评

暂无评论

重楼总皂苷对脓毒症大鼠的保护作用研究

中国危重病急救医学 2008年第9期20卷 568-570,F0003页

作者：周满红汪松马璇岚李堂江刘同英刘安平遵义医学院附属医院急诊科贵州遵义563003

目的观察重楼总皂苷对脓毒症大鼠的保护作用并探讨其作用机制。方法采用盲肠结扎穿孔术（CLP）制备大鼠脓毒症模型，观察重楼总皂苷对CLP大鼠死亡率的影响。用酶联免疫吸附法（EliSA）检测术后2、6、12、24和48h大鼠血清肿瘤坏死因子-α... 详细信息

目的观察重楼总皂苷对脓毒症大鼠的保护作用并探讨其作用机制。方法采用盲肠结扎穿孔术（CLP）制备大鼠脓毒症模型，观察重楼总皂苷对CLP大鼠死亡率的影响。用酶联免疫吸附法（EliSA）检测术后2、6、12、24和48h大鼠血清肿瘤坏死因子-α（TNF-α）和白细胞介素-1β（IL-1β）水平；光镜下观察72h大鼠肺组织病理学变化。分离大鼠腹腔巨噬细胞（PMФ），用EliSA检测重楼总皂苷对LPS（100μg／L）诱导大鼠PM由释放TNF-α及IL-1β的影响。结果重楼总皂苷组大鼠死亡率明显低于模型组（50．0％比85．0％，P〈0．05）。重楼总皂苷各浓度组血清TNF-α和IL-1β水平较模型组相应时间点明显降低（P〈0．05或P〈0．01）；肺组织病理学观察显示肺损伤程度较轻。体外实验表明，5、10、20和40mg／L重楼总皂苷均可显著降低LPS刺激PMФ释放TNF-α和IL-1β的水平（P均〈0．01）；且各浓度组间TNF-α水平差异无统计学意义（P均〉0．05）；而5mg／L组IL-1β水平显著高于10mg／L组（P〈0.05），但与20mg／L组和40mg／L组比较差异无统计学意义（P均〉0．05）。结论重楼总皂苷能抑制CLP大鼠巨噬细胞活化并减轻肺损伤程度，对CLP大鼠具有保护作用。

关键词：重楼总皂苷脓毒症巨噬细胞肿瘤坏死因子-α 白细胞介素-1β 脂多糖

Deep learning-based LPI radar signals analysis and identification using a Nyquist Folding Receiver architecture

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2023年第1期19卷 196-209页

作者： Tao Wan Kai-li jiang Hao Ji Bin tang School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu611731China

Nyquist Folding Receiver(NYFR)is a perceptron structure that realizes a low probability of intercept(LPI)signal analog to *** at the problem of LPI radar signal receiving,the time domain,frequency domain,and time-frequency domain problems of signals intercepted by NYFR structure are *** with the time-frequency analysis(TFA)method,a radar recognition scheme based on deep learning(DL)is introduced,which can reliably classify common LPI radar ***,the structure of NYFR and its characteristics in the time domain,frequency domain,and time and frequency domain are ***,the received signal is then converted into a time-frequency image(TFI).Finally,four kinds of DL algorithms are used to classify LPI radar *** results demonstrate the correctness of the NYFR structure,and the effectiveness of the proposed recognition method is verified by comparison experiments.

关键词： Nyquist folding receiver Ultra-wideband Deep learning Time-frequency analysis Identification Classification

Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第1期 369-376页

作者： Song-Meng Wang Hao Nian Yan-Fang Wang li-Shuo Zheng Yu-Tao Zheng Yi-Wei Dong liping Huang Xiaoping Wang Wei jiang liu-Pan Yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

关键词：

同方期刊数据库