检索结果-南通市图书馆

Graphene and graphene-based materials in axonal repair of spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2022年第10期17卷 2117-2125页

作者： Shi-Xin Wang yu-Bao Lu Xue-Xi Wang Yan Wang yu-jun song Xiao Wang Munkhtuya Nyamgerelt School of Basic Medical Sciences Lanzhou UniversityLanzhouGansu ProvinceChina The Second Clinical Medical College Lanzhou UniversityLanzhouGansu ProvinceChina Department of Spine Surgery The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of Evidence-Based Medicine and Knowledge Translation of Gansu Province LanzhouGansu ProvinceChina

Graphene and graphene-based materials have the ability to induce stem cells to differentiate into neurons,which is necessary to overcome the current problems faced in the clinical treatment of spinal cord *** review summarizes the advantages of graphene and graphene-based materials(in particular,composite materials)in axonal repair after spinal cord *** materials have good histocompatibility,and mechanical and adsorption properties that can be targeted to improve the environment of axonal *** also have good conductivity,which allows them to make full use of electrical nerve signal stimulation in spinal cord tissue to promote axonal ***,they can be used as carriers of seed cells,trophic factors,and drugs in nerve tissue engineering scaffolds to provide a basis for constructing a local microenvironment after spinal cord ***,to achieve clinical adoption of graphene and graphene-based materials for the repair of spinal cord injury,further research is needed to reduce their toxicity.

关键词： axonal regeneration graphene graphene oxide nerve axon regeneration reduced graphene oxide spinal cord contusions spinal cord injury spinal cord trauma

Diagnosis and treatment of novel coronavirus pneumonia based on the theory of traditional Chinese medicine

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Medicine 2020年第4期18卷 275-283页

作者： Shi-xin Wang Yan Wang yu-bao Lu Jie-yun Li yu-jun song Munkhtuya Nyamgerelt Xue-xi Wang School of Basic Medical Sciences Lanzhou UniversityLanzhou 730000Gansu ProvinceChina The Second Clinical Medical College Lanzhou UniversityLanzhou 730000Gansu ProvinceChina Key Laboratory of Evidence-Based Medicine and Knowledge Translation of Gansu Province Lanzhou 730000Gansu ProvinceChina

Since the outbreak of novel coronavirus pneumonia(coronavirus disease 2019,COVID-19),it has rapidly spread to 187 countries,causing serious harm to the health of people and a huge social ***,currently,drugs specifically approved for clinical use are not available,except for vaccines against COVID-19 that are being *** Chinese medicine(TCM)is capable of performing syndrome differentiation and treatment according to the clinical manifestations of patients,and has a better ability of epidemic prevention and *** authors comprehensively analyzed the etiology and pathogenesis of COVID-19 based on the theory of TCM,and discussed its syndrome differentiation,treatment and prevention measures so as to provide strategies and reference for the prevention and treatment with TCM.

关键词： Coronavirus Novel coronavirus Coronavirus disease 2019 COVID-19 Novel coronavirus pneumonia Severe acute respiratory syndrome coronavirus 2 Traditional Chinese medicine

Reinforcing the continent mechanism of continent cutaneous diversions by wrapped rectus abdominis muscle flap： a preliminary experimental study

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2009年第9期122卷 1087-1091页

作者： ZHANG Xin-ru XU yue-min FENG Chao yu Jian-jun song Lu-jie FEI Xiao-fang Department of Urology Shanghai Jiaotong University AffiliatedShanghai 6th Hospital Shanghai 200023 China

Background Continent cutaneous diversion （CCD） has been widely used in almost any lower urinary reconstruction. We have been continually trying to modify this procedure because of the high complications rate, especially as they relate to the efferent tube. In this study, we reported a modified procedure with a tapered ileum wrapped by the rectus abdominalis flap （RAMF） and assessed the feasibility of this new technique to achieve urinary continence. Methods A procedure in which two ileal segments were tapered and connected to a U-shaped reservoir was performed in ten dogs. A RAMF with its blood supply was wrapped around one of the tapered ileum. In control groups, the tapered ileum was brought to the abdominal skin. Urodynamic studies were conducted In the 1st, 3rd and 6th months post-operatively. The data of maximum inner pressure （MIP） and functional pressure length （FPL） in every group at each phase were recorded. Retrograde radiograms of the efferent limbs were performed before sacrifice. Results MIP in the study group was significantly higher than that in the control group at each phase （P 〈0.05）. However no significant differences in MIP or FPL were found in the study group between an empty and full reservoir. In the control group, MIP increased （P 〈0.05） and FPL decreased significantly （P 〈0.05） compared with an empty and full reservoir. Retrograde radiograms confirmed that efferent limbs were positioned straigh beneath the abdominal wall. Histological examination of the study group demonstrated a layer of striated muscle around the outside surface of the ileum. Conclusion The continent mechanism of tapered ileum can be enhanced by extra support from wrapped RAMF.

关键词： urinary diversions continent urinary reservoir abdomen rectus muscles

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

图像多次无降质编解码的研究

上海交通大学学报 2004年第4期38卷 616-619页

作者：易彦孙军余松煜上海交通大学图像通信与信息处理研究所上海200030

利用向量矩阵的完全可逆性和量化过程的幂等特性,在编解码过程中引入可逆整数DCT实现了图像的多次无降质编解码.在此基础上,借鉴量化DCT的思想,进一步将可分的量化矩阵分解为多个向量矩阵的组合与乘积,提高了图像第1次编解码后的图像质... 详细信息

利用向量矩阵的完全可逆性和量化过程的幂等特性,在编解码过程中引入可逆整数DCT实现了图像的多次无降质编解码.在此基础上,借鉴量化DCT的思想,进一步将可分的量化矩阵分解为多个向量矩阵的组合与乘积,提高了图像第1次编解码后的图像质量.该方法与AT-LANTIC计划中提出的"鼹鼠"计划相结合,可实现高质量的视频多次无降质编解码.

关键词：编码解码数字电视向量矩阵量化离散余弦变换

Inspires effective alternatives to backpropagation:predictive coding helps understand and build learning

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第11期20卷 3215-3216页

作者： Zhenghua Xu Miao yu yuhang song School of Health Sciences and Biomedical Engineering Hebei University of TechnologyTianjinChina Department of Computer Science University of OxfordOxfordUK

Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human *** enable learning by brain and machine,it is essential to accurately identify and correct the prediction errors,referred to as credit assignment(Lillicrap et al.,2020).It is critical to develop artificial intelligence by understanding how the brain deals with credit assignment in neuroscience.

关键词： assignment learning enable

Effect of cholesterol metabolism on hepatolithiasis

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2025年第1期31卷 157-162页

作者： Lin Zheng Zi-yu Ye jun-Ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesNo.215 Heping West RoadShijiazhuang 050000Hebei ProvinceChina

Surgical intervention is currently the primary treatment for hepatolithiasis;how-ever,some patients still experience residual stones and high recurrence rates after *** metabolism seems to play an important role in hepatoli-thiasis pathogenesis.A high cholesterol diet is one of the significant reasons for the increasing incidence of ***,regular diet and appropriate medical intervention are crucial measures to prevent hepatolithiasis and reduce recurrence rate after *** dietary cholesterol and drugs that increase cholesterol stone solubility are key therapeutic approaches in treating *** article discusses the cholesterol metabolic pathways related to the pathogenesis of hepatolithiasis,as well as food intake and targeted therapeutic drugs.

关键词： Hepatolithiasis Cholesterol metabolism High-fat diet 3-hydroxy-3-methylglutaryl-coenzyme A reductase Interlobular bile duct

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

Windows下缓冲区溢出漏洞的利用

计算机工程 2007年第17期33卷 162-164页

作者：余俊松张玉清宋杨刘奇旭中国科学院研究生院国家计算机网络入侵防范中心北京100049

给出了缓冲区溢出的原理,分析了Windows平台下利用缓冲区溢出漏洞进行网络攻击的方法和特征,在此基础上提出了Windows平台下缓冲区溢出漏洞利用的开发流程。通过一个存在缓冲区溢出漏洞的ftp软件的利用实例验证了这个开发流程的有效性。

关键词：缓冲区溢出 Windows 漏洞利用

H.263中全零离散余弦变换系数的预先判别

在线全文

学校读者我要写书评

暂无评论

上海交通大学学报 2001年第9期35卷 1404-1407页

作者：石峻余松煜陈颖琪上海交通大学图像通信与信息处理研究所上海200030

为减少编码器的运算量 ,对量化后离散余弦变换 ( DCT)系数全为零的块进行预先判断 ,从而不对其做相应的 DCT变换与量化 ,提出了预先判断全零 DCT系数块的方法 .在分析现有判别方法对全零系数块的误判与漏判的基础上 ,从二维 DCT变换的... 详细信息

为减少编码器的运算量 ,对量化后离散余弦变换 ( DCT)系数全为零的块进行预先判断 ,从而不对其做相应的 DCT变换与量化 ,提出了预先判断全零 DCT系数块的方法 .在分析现有判别方法对全零系数块的误判与漏判的基础上 ,从二维 DCT变换的公式出发 ,给出了误判与漏判的判别准则 ,并以这一准则为指导 ,提出了一种在保证不出现误判的条件下减少漏判的新方法 ,提高了判别效率 .给出了具有一般表示的判别式 ,可以应用于不同尺寸的变换块 ,同时给出了另一个判别效率更高的经验判别式 .实验结果表明 ,所提供的判别方法提高了全零

关键词：离散余弦变换量化全零系数块多媒体视频图像编码系数判别

Mechanistic insight into the synergy between nickel single atoms and nanoparticles on N-doped carbon for electroreduction of CO2

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 327-336页

作者： Mingdong Sun Wenwen Guan Cailing Chen Chao Wu Xiaoling Liu Biao Meng Tao Chen yu Han jun Wang Shibo Xi yu Zhou State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Advanced Membranes and Porous Materials Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology Institute of Sustainability for Chemicals Energy and Environment A*STAR (Agency for Science Technology and Research) College of Materials Science and Engineering Sichuan University

The synergy of single atoms （SAs） and nanoparticles （NPs） has demonstrated great potential in promoting the electrocatalytic carbon dioxide reduction reaction （CO2RR）;however,the rationalization of the SAs/NPs proportion remains one challenge for the catalyst ***,a Ni2+-loaded porous poly（ionic liquids）(PIL) precursor synthesized through the free radical self-polymerization of the ionic liquid monomer,1-allyl-3-vinylimidazolium chloride,was pyrolyzed to prepare the Ni,N co-doped carbon materials,in which the proportion of Ni SAs and NPs could be facilely modulated by controlling the annealing *** catalyst Ni-NC-1000 with a moderate proportion of Ni SAs and NPs exhibited high efficiency in the electrocatalytic conversion of CO2into *** Ni K-edge X-ray absorption near-edge structure （XANES） spectra and theoretical calculations were conducted to gain insight into the synergy of Ni SAs and *** charge transfer from Ni NPs to the surrounding carbon layer and then to the Ni SAs resulted in the electron-enriched Ni SAs active *** the electroreduction of CO2,the coexistence of Ni SAs and NPs strengthened the CO2activation and the affinity towards the key intermediate of*COOH,lowering the free energy for the potential-determining*CO2→*COOH step,and therefore promoted the catalysis efficiency.

关键词： Single atom catalyst Synergy effect Carbon catalyst Electrocatalysis