检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

粘结剂对含碳球团还原的影响

钢铁研究学报 2000年第4期12卷 1-4页

作者：蒋武锋李运刚赵利国吕庆刘玉全河北理工学院冶金系河北唐山063009 天津天铁冶金集团公司河北邯郸056404

水玻璃已被证明是用于含碳球团的理想粘结剂。作者研究了在 90 0～ 1 2 0 0℃、氮气氛中粘结剂 (水玻璃 )对含碳球团还原的影响 ,对实验数据进行了动力学分析 ,给出了理论解释 ,并指出了其在生产中的应用。结果表明 :水玻璃可促进含碳... 详细信息

水玻璃已被证明是用于含碳球团的理想粘结剂。作者研究了在 90 0～ 1 2 0 0℃、氮气氛中粘结剂 (水玻璃 )对含碳球团还原的影响 ,对实验数据进行了动力学分析 ,给出了理论解释 ,并指出了其在生产中的应用。结果表明 :水玻璃可促进含碳球团还原 ,该还原反应由球团内矿粒层中的气相内扩散控制 ,加入水玻璃并没有改变这一限制环节 ,但可减少该环节的阻力。

关键词：含碳球团水玻璃还原粘结剂

Bending Stiffness of Concrete-Filled Steel Tube and Its Influence on Concrete Placement Timing of Composite Beam-String Structure

在线全文

学校读者我要写书评

暂无评论

Structural Durability & Health Monitoring 2025年第1期19卷 55-75页

作者： Zhenyu Zhang quan Jin Haitao Zhang Zhao liu yuyang Wu Longfei Zhang Renzhang Yan CCCC Third Highway Engineering Co. Ltd.Beijing101300China School of Civil Engineering Chongqing Jiaotong UniversityChongqing400074China

When the upper chord beam of the beam-string structure(BSS)is made of concrete-filled steel tube(CFST),its overall stiffness will change greatly with the construction of concrete placement,which will have an impact on the design of the tensioning plans and selection of control measures for the *** order to accurately obtain the bending stiffness of CFST beam and clarify its impact on the mechanical properties of composite BSS during construction,the influence of some factors such as height-width ratio,wall thickness of steel tube,elasticity modulus of concrete,and friction coefficient on the bending stiffness are analyzed parametrically by the numerical simulation technology based on an actual *** calculation formula of the equivalent bending stiffness of CFST is also established through mathematical statistical ***,the equivalent bending stiffness is introduced into the construction and use stages of the composite BSS,respectively,and the mechanical properties such as prestress-tensioning control value,structural deformation,and internal force of key members are comparatively analyzed when adopting two different construction ***,the optimal construction plan of concrete placement first and then prestress-tensioning is proposed.

关键词： Concrete panels freeze-thaw damage compression-shear crack tension-shear crack

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

行道绿化夏季小气候效应研究及模糊综合评价

南京林业大学学报（自然科学版） 2000年第6期24卷 54-58页

作者：钱妙芬张凤娟张友金刘禹全成都气象学院四川成都610041 成都市园林局四川成都610081

选择成都市区 5种行道绿化结构和 3种典型天气 ,在树木阴影中心测定光照强度、湿度、风速等气象要素 ,同时在临近空旷水泥路面进行对比观测。比较不同天气条件下遮光率、降温率和增湿效应 ,并运用模糊关系原理进行综合评价。结果表明 :... 详细信息

选择成都市区 5种行道绿化结构和 3种典型天气 ,在树木阴影中心测定光照强度、湿度、风速等气象要素 ,同时在临近空旷水泥路面进行对比观测。比较不同天气条件下遮光率、降温率和增湿效应 ,并运用模糊关系原理进行综合评价。结果表明 :女贞 +冬青小气候效应最佳 ,依次是银杏 +女贞 +草坪、香樟 +冬青、草坪、法国梧桐。草坪对 0 .1 0m高度上增湿效果最好。

关键词：遮光率降温率综合评价行道绿化小气候效应

Flexible Graphene Field‑Effect Transistors and Their Application in Flexible Biomedical Sensing

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 252-313页

作者： Mingyuan Sun Shuai Wang Yanbo Liang Chao Wang yunhong Zhang Hong liu yu Zhang Lin Han Institute of Marine Science and Technology Shandong UniversityQingdao 266237ShandongPeople’s Republic of China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongPeople’s Republic of China School of Integrated Circuits Shandong UniversityJinan 250100ShandongPeople’s Republic of China Shandong Engineering Research Center of Biomarker and Artificial Intelligence Application Jinan250100ShandongPeople’s Republic of China

Flexible electronics are transforming our lives by making daily activities more *** to this innovation are field-effect transistors(FETs),valued for their efficient signal processing,nanoscale fabrication,low-power consumption,fast response times,and ***,known for its exceptional mechanical properties,high electron mobility,and biocompatibility,is an ideal material for FET channels and *** combination of graphene and FETs has given rise to flexible graphene field-effect transistors(FGFETs),driving significant advances in flexible electronics and sparked a strong interest in flexible biomedical ***,we first provide a brief overview of the basic structure,operating mechanism,and evaluation parameters of FGFETs,and delve into their material selection and patterning *** ability of FGFETs to sense strains and biomolecular charges opens up diverse application *** specifically analyze the latest strategies for integrating FGFETs into wearable and implantable flexible biomedical sensors,focusing on the key aspects of constructing high-quality flexible biomedical ***,we discuss the current challenges and prospects of FGFETs and their applications in biomedical *** review will provide valuable insights and inspiration for ongoing research to improve the quality of FGFETs and broaden their application prospects in flexible biomedical sensing.

关键词： Flexible Graphene Field-effect transistor Wearable Implantable Biosensor

在线全文

学校读者我要写书评

暂无评论

基于扩频技术的自适应数字水印研究

武汉理工大学学报 2003年第7期25卷 71-74页

作者：刘泉余娜敏武汉理工大学信息工程学院武汉430070

基于扩频技术研究了数字图像水印的相关特性 ,采用直接序列扩频技术对水印信号进行频谱扩展 ,然后通过基于空间视觉掩盖的可感知噪声阈值矩阵 JND门限决定水印强度和嵌入位置 ,实现了空域中图像自适应的水印算法。实验证明数字水印保证... 详细信息

基于扩频技术研究了数字图像水印的相关特性 ,采用直接序列扩频技术对水印信号进行频谱扩展 ,然后通过基于空间视觉掩盖的可感知噪声阈值矩阵 JND门限决定水印强度和嵌入位置 ,实现了空域中图像自适应的水印算法。实验证明数字水印保证了人眼视觉不可察觉性 ,并且对包括 JPEG压缩、均值滤波。

关键词：数字水印扩频技术人类视觉系统

FUBP3 mediates the amyloid-β-induced neuronal NLRP3 expression

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 2068-2083页

作者： Jing Yao yuan Li Xi liu Wenping Liang yu Li Liyong Wu Zhe Wang Weihong Song The National Clinical Research Center for Geriatric Disease Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Neurology The First Affiliated Hospital of Zhengzhou UniversityZhengzhouHenan ProvinceChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina Department of Pediatrics The Second Affiliated Hospital and Yuying Children’s HospitalKey Laboratory of Alzheimer’s Disease of Zhejiang ProvinceInstitute of AgingWenzhou Medical UniversityWenzhouZhejiang ProvinceChina Oujiang Laboratory(Zhejiang Laboratory for Regenerative Medicine Visionand Brain Health)WenzhouZhejiang ProvinceChina

Alzheimer's disease is characterized by deposition of amyloid-β,which forms extracellular neuritic plaques,and accumulation of hyperphosphorylated tau,which aggregates to form intraneuronal neurofibrillary tangles,in the *** NLRP3 inflammasome may play a role in the transition from amyloid-βdeposition to tau phosphorylation and *** NLRP3 is primarily found in brain microglia,and tau is predominantly located in neurons,it has been suggested that NLRP3 expressed by microglia indirectly triggers tau phosphorylation by upregulating the expression of pro-inflammatory ***,we found that neurons also express NLRP3 in vitro and in vivo,and that neuronal NLRP3 regulates tau *** biochemical methods,we mapped the minimal NLRP3 promoter and identified FUBP3 as a transcription factor regulating NLRP3 expression in *** primary neurons and the neuroblastoma cell line Neuro2A,FUBP3 is required for endogenous NLRP3 expression and tau phosphorylation only when amyloid-βis *** the brains of aged wild-type mice and a mouse model of Alzheimer's disease,FUBP3 expression was markedly increased in cortical *** analysis suggested that FUBP3 plays a role in neuron-mediated immune *** also found that FUBP3 trimmed the 5′end of DNA fragments that it bound,implying that FUBP3 functions in stress-induced *** findings suggest that neuronal NLRP3 may be more directly involved in the amyloid-β-to–phospho-tau transition than microglial NLRP3,and that amyloid-βfundamentally alters the regulatory mechanism of NLRP3 expression in *** that FUBP3 was only expressed at low levels in young wild-type mice and was strongly upregulated in the brains of aged mice and Alzheimer's disease mice,FUBP3 could be a safe therapeutic target for preventing Alzheimer's disease progression.

关键词： 5′end trimming Alzheimer's disease amyloid-beta amyloid-β-dependent transcription FUBP3 inflammasome inflammation neuron NLRP3 tau transcription factor

在线全文

学校读者我要写书评

暂无评论

周王断裂在地球物理场上的反映

能源技术与管理 2022年第4期47卷 161-163页

作者：阮永刚刘玉泉安徽省勘查技术院安徽合肥230031

周王断裂是安徽省内的一条重要的隐伏深断裂,不仅控制着北部盆地的边界而且还是扬子地层分区和江南地层分区的分界线。由于其隐伏的特性在地质上无明显的特征,所以可以从地球物理的角度对周王断裂的构造特征、规模和性质进行描述和分析... 详细信息

周王断裂是安徽省内的一条重要的隐伏深断裂,不仅控制着北部盆地的边界而且还是扬子地层分区和江南地层分区的分界线。由于其隐伏的特性在地质上无明显的特征,所以可以从地球物理的角度对周王断裂的构造特征、规模和性质进行描述和分析。结合重力、磁法、电法等物探资料,对周王断裂的性质在物探上的反映进行了分析和描述,认为周王断裂是一条早期形成的东西走向、向南倾的逆冲断层。

关键词：周王断裂物探重力磁法大地电磁