检索结果-南通市图书馆

Oxidation Resistance of Form-stable Hightemperature Phase Change Thermal Energy Storage Materials Doped by Impregnated Graphite

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 Wuhan University of Technology(Materials Science) 2025年第1期40卷 1-12页

作者： LI Baorang DAI Jianhuan ZHANG Wei liu Xiangchen YANG liu School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China School of Ener-gy and Environment Southeast UniversityNanjing 210096China

We adopted the solution impregnation route with aluminum dihydrogen phosphate solution as liquid medium for effective surface modification on graphite *** mass ratio of graphite to Al(H_(2)PO_(4))_(3) changed from 0.5:1 to 4:1,and the impregnation time changed from 1 to 7 *** typical composite phase change thermal storage materials doped with the as-treated graphite were fabricated using form-stable *** investigate the oxidation and anti-oxidation behavior of the impregnated graphite at high temperatures,the samples were put into a muffle furnace for a cyclic heat *** on SEM,EDS,DSC techniques,analyses on the impregnated technique suggested an optimized processing conditions of a 3 h impregnation time with the ratio of graphite:Al(H_(2)PO_(4))_(3) as 1:3 for graphite impregnation *** investigations on high-temperature phase change heat storage materials doped by the treated graphite suggested excellent oxidation resistance and thermal cycling performance.

关键词： phase change materials graphite impregnation method oxidation,sintering thermal analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

干旱荒漠区沙地衬膜樟子松育苗技术研究

水土保持学报 2003年第3期17卷 170-173页

作者：满多清徐先英吴春荣杨自辉刘世增甘肃省治沙研究所甘肃武威733000

沙地衬膜试验结果表明:衬膜沙地栽植的樟子松苗木当年平均成活率高于对照地;不同越冬处理的苗木越冬率从大到小为埋土,衬膜深度90cm露地,衬膜深度70cm露地,不衬膜露地越冬。高生长量显示出第一年、第二年衬膜苗高于对照苗,而第三年衬膜... 详细信息

沙地衬膜试验结果表明:衬膜沙地栽植的樟子松苗木当年平均成活率高于对照地;不同越冬处理的苗木越冬率从大到小为埋土,衬膜深度90cm露地,衬膜深度70cm露地,不衬膜露地越冬。高生长量显示出第一年、第二年衬膜苗高于对照苗,而第三年衬膜苗弱于对照苗。灌水量相同的条件下,衬膜苗在生长季节利于苗木旺盛生长;秋冬春季苗地土壤水分过多,地块低洼处的苗木保存率降低,生长量也较低,对照地苗木则相反。建议通过控制灌水量,积极探索衬膜种植的栽培学技术,创造条件,实行少量多次的定额灌溉,是干旱区进一步提高樟子松育苗成活率、保存率的一种新的有效途径。

关键词：干旱荒漠区樟子松育苗技术沙地衬膜苗木成活率苗木保存率生长量少量多次定额灌溉

在线全文

学校读者我要写书评

暂无评论

CT结肠造影的优势及关键技术

世界华人消化杂志 2010年第7期18卷 679-684页

作者：叶玉芳张淑倩李东辉王连庆周汝明刘蓉辉孙吉林河北省人民医院医学影像中心河北省石家庄市050051 河北经贸大学校医院河北省石家庄市050061

目的:评价CT结肠造影(CTC)对结肠病变检出的优势,总结结肠CTC检查的技术关键.方法:对46例患者行结肠充气CTC检查,部分病例采用了仰及俯卧位双体位扫描,综合应用了包括多平面重建、仿真内窥镜、表面和透明重建、管腔展开等多种后处理技... 详细信息

目的:评价CT结肠造影(CTC)对结肠病变检出的优势,总结结肠CTC检查的技术关键.方法:对46例患者行结肠充气CTC检查,部分病例采用了仰及俯卧位双体位扫描,综合应用了包括多平面重建、仿真内窥镜、表面和透明重建、管腔展开等多种后处理技术来评价结肠黏膜面及肠外表现.结果:11例CTC未见异常,11例为结肠息肉(其中1例为家族性息肉病患者),16例结肠恶性病变(2例表现为结肠壁局限性增厚、14例表现为肠壁肿块),5例结肠炎性病变,3例其他结肠病变.结论:CTC可真实地评价结肠病变的部位、大小以及周围侵犯;充分的肠道准备、充入足够量的气体并充分利用多种后处理技术是CTC的技术关键.

关键词：体层摄影术 X线计算机结肠息肉结肠成像

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

病因相关肠易激综合征动物模型研究进展

世界华人消化杂志 2018年第30期26卷 1772-1777页

作者：张方翁志军吴璐一包春辉杨玲赵敏吴焕淦刘慧荣周次利上海市针灸经络研究所针灸免疫室上海市200030 上海市气功研究所上海市200030

肠易激综合征(irritable bowel syndrome, IBS)属于慢性功能性肠道疾病,其发病率在全球范围内呈逐年上升趋势.目前病因和发病机制尚不完全明确,较为公认的病因包括内脏高敏感、肠道感染、精神心理、胃肠激素、肠道菌群紊乱、基因遗传等... 详细信息

肠易激综合征(irritable bowel syndrome, IBS)属于慢性功能性肠道疾病,其发病率在全球范围内呈逐年上升趋势.目前病因和发病机制尚不完全明确,较为公认的病因包括内脏高敏感、肠道感染、精神心理、胃肠激素、肠道菌群紊乱、基因遗传等因素.因此,研究者研发了多种与IBS病因相关的动物模型,取得了重大研究进展并普遍应用于基础实验研究.本文概括总结了目前与IBS病因相关的国内外通用的动物模型的制作方法,以期为IBS基础研究的动物模型选择提供参考.

关键词：肠易激综合征内脏高敏感病因动物模型

DIGNN-A:Real-Time Network Intrusion Detection with Integrated Neural Networks Based on Dynamic Graph

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 817-842页

作者： Jizhao liu Minghao Guo College of Computer Zhongyuan University of TechnologyZhengzhou450007China

The increasing popularity of the Internet and the widespread use of information technology have led to a rise in the number and sophistication of network attacks and security *** detection systems are crucial to network security,playing a pivotal role in safeguarding networks from potential ***,in the context of an evolving landscape of sophisticated and elusive attacks,existing intrusion detection methodologies often overlook critical aspects such as changes in network topology over time and interactions between *** address these issues,this paper proposes a real-time network intrusion detection method based on graph neural *** proposedmethod leverages the advantages of graph neural networks and employs a straightforward graph construction method to represent network traffic as dynamic graph-structured ***,a graph convolution operation with a multi-head attention mechanism is utilized to enhance the model’s ability to capture the intricate relationships within the graph structure ***,it uses an integrated graph neural network to address dynamic graphs’structural and topological changes at different time points and the challenges of edge embedding in intrusion detection *** edge classification problem is effectively transformed into node classification by employing a line graph data representation,which facilitates fine-grained intrusion detection tasks on dynamic graph node feature *** efficacy of the proposed method is evaluated using two commonly used intrusion detection datasets,UNSW-NB15 and NF-ToN-IoT-v2,and results are compared with previous studies in this *** experimental results demonstrate that our proposed method achieves 99.3%and 99.96%accuracy on the two datasets,respectively,and outperforms the benchmark model in several evaluation metrics.

关键词： Intrusion detection graph neural networks attention mechanisms line graphs dynamic graph neural networks

Interconnections between diabetic corneal neuropathy and diabetic retinopathy:diagnostic and therapeutic implications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第8期20卷 2169-2180页

作者： Mingyi Yu Faith Teo En Ning Chang liu Yu-Chi liu Tissue Engineering and Stem Cell Group Singapore Eye Research InstituteSingapore Yong Loo Lin School of Medicine National University of SingaporeSingapore Department of Cornea and External Eye Disease Singapore National Eye CenterSingapore Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore

Diabetic corneal neuropathy and diabetic retinopathy are ocular complications occurring in the context of diabetes *** corneal neuropathy refers to the progressive damage of corneal *** retinopathy has traditionally been considered as damage to the retinal ***,growing evidence suggests that diabetic retinopathy is a complex neurovascular disorder resulting from dysfunction of the neurovascular unit,which includes both the retinal vascular structures and neural *** retinopathy is one of the leading causes of blindness and is frequently screened for as part of diabetic ocular ***,diabetic corneal neuropathy is commonly overlooked and underdiagnosed,leading to severe ocular surface *** studies have found that these two conditions tend to occur together,and they share similarities in their pathogenesis pathways,being triggered by a status of chronic *** review aims to discuss the interconnection between diabetic corneal neuropathy and diabetic retinopathy,whether diabetic corneal neuropathy precedes diabetic retinopathy,as well as the relation between the stage of diabetic retinopathy and the severity of corneal *** also endeavor to explore the relevance of a corneal screening in diabetic eyes and the possibility of using corneal nerve measurements to monitor the progression of diabetic retinopathy.

关键词： cornea corneal nerves diabetes diabetic corneal neuropathy diabetic retinopathy retina

猪嵴病毒荧光定量RT-PCR检测方法的建立和应用

在线全文

学校读者我要写书评

暂无评论

中国兽医科学 2018年第4期48卷 438-442页

作者：谢荣辉刘霞赵灵燕倪柏锋柴娟王雅婷吴赟竑徐辉浙江省动物疫病预防控制中心

根据猪嵴病毒3D基因保守序列设计引物和TaqMan探计．通过优化反应体系．建立了猪嵴病毒荧光定量RT—PCR检测方法，并对该方法进行特异性、敏感性和重复性评价；同时以10倍梯度稀释的质粒标准品建立荧光定量RT—PCR的标准曲线，构建定量... 详细信息

根据猪嵴病毒3D基因保守序列设计引物和TaqMan探计．通过优化反应体系．建立了猪嵴病毒荧光定量RT—PCR检测方法，并对该方法进行特异性、敏感性和重复性评价；同时以10倍梯度稀释的质粒标准品建立荧光定量RT—PCR的标准曲线，构建定量分析模型。结果显示．建立的方法能特异性检测猪嵴病毒，与其他引起猪腹泻的病毒无交叉反应，对标准品的检测灵敏度达10copies／pL；标准曲线CI值和模板终浓度在107～10copies／μL范围内有良好的线性关系；重复性试验变异系数均小于2．5％。对139份猪粪便样品进行检测，荧光定量RT-PCR阳性检出率为30．94％（43／139），常规RT—PCR为29．50％（41／139）。本研究建立的荧光定量RT-PCR可用于猪嵴病毒的快速检测和流行病学调查。

关键词：猪嵴病毒荧光定量RT-PCR 检测

Observation of topological charge transformations in acoustic vortex using passive periodic systems

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 140-147页

作者： Di-Chao Chen Xie liu Changqing Xu Da-Jian Wu Ying Cheng Xiao-Jun liu School of Physics and Technology Nanjing Normal University Key Laboratory of Modern Acoustics School of Physics Nanjing University

Vortex transmutation utilizes a periodic system, which not only enables the alteration of the topological charge(TC) of unstable input vortices but also facilitates their transformation into stable structures. This approach is crucial for investigating the characteristics of vortices in various wave systems. Here, we achieve acoustic vortex TC transmutation by employing a welldesigned dual-structured plate external system(DPES). The interactions between the acoustic vortex and the finite-order discrete rotational symmetry lead to the transformation of its topological charge when complete rotational symmetry is broken to Nthorder discrete symmetry. Our results experimentally demonstrate the acoustic vortex TC transmutation based on passive artificial structures, enabling numerous applications in particle manipulation and information multiplexing as well as advancing our understanding and control over free-space acoustic vortices.

关键词： acoustic vortex topological charge transformation artificial structure

The challenge of emerging SARS-CoV-2 mutants to vaccine development

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Genetics and Genomics 2021年第2期48卷 102-106页

作者： rong Li Jun liu hui Zhang Institute of Human Virology Key Laboratory of Tropical Disease Control of Ministry of EducationGuangdong Engineering Research Center for Antimicrobial Agent and ImmunotechnologyZhongshan School of MedicineSun Yat-sen UniversityGuangzhouGuangdong 570080China

Since the outbreak of the pandemic,waves of epidemics caused by severe acute respiratory syndrome coronavirus 2(SARS-Co V-2)variants that harbor novel mutations have never ***,it undergoes rapid mutations that involve single-nucleotide polymorphism(SNP)dominantly,whereas ORF1ab and spike genes contain the most of more than 20,000 mutation sites reported within a year(Fang et al.,2021).Mutations inside spike protein are highly concerned for their potential impact on viral transmissibility and immune evasion,as spike protein is responsible for the interaction with the viral receptor angiotensin-converting enzyme 2(ACE2)to mediate viral entry to the target cells.D614G identified in early 2020 is a globally dominant mutation(Korber et al.,2020).In late 2020,several variants were reported,which had caused continental and eventually worldwide *** notable variants include B.1.1.7 lineage(501Y.V1,Variant of Concern[VOC]202012/01),501Y.V2 variant(known as B.1.351 lineage),and P.1 lineage(also named 501Y.V3).In comparison with the D614G and D614 lineages identified in early 2020,they contain a large number of mutations within spike protein(Fig.1).

关键词： respiratory acute eventually