检索结果-南通市图书馆

Resistance of Cement-based Grouting Materials with Nano-SiO2 Emulsion to Chloride Ion Penetration

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 114-119页

作者：黎水平 CHENG Jian WEI Chao yuAN Bin yu chengxiao College of Architectural Science and Engineering Yangzhou University

The chloride penetration resistance of cement-based grout materials was improved by nano-silica *** of mixtures containing different nano-silica particles or emulsions were exposed in sodium chloride solutions of specific concentrations with different test *** properties of the mixes were assessed in terms of weight loss and compressive strength.X-ray diffraction （XRD） and scanning electron microscopy （SEM） of mixes were performed to analysis the phase evolution and *** results demonstrated that the introduction of nano-SiO2emulsion significantly decreased the compressive strength loss and calcium hydroxide （CH） crystal content of hydration production,and then enhanced the resistance of cement-based grouting materials to chloride ion *** improvement derives from the filling and pozzolanic effects of nano-SiO2particles,which were incorporated via an emulsion and attributed to a well dispersion in grouting matrix.

关键词：

ICN Based Vehicle-to-Cloud Delivery for Multimedia Streaming in Urban Vehicular Networks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

China Communications 2016年第9期13卷 103-112页

作者： Wei Quan Fei Song chengxiao yu Mingchuan Zhang National Engineering Laboratory for Next Generation Internet Technologies School of Electronic and Information EngineeringBeijing Jiaotong University College of Information Engineering Henan University of Science and Technology

Mobile multimedia streaming is an open topic in vehicular environment. Due to the high intermittent links, it has become a critical challenge to deliver high quality video streaming in vehicular networks. In this paper, we reform the Information Centric Networking （ICN） concept for multimedia delivery in urban vehicular networks. By leveraging the 1CN perspective, we highlight that vehicular peers can obtain multimedia chunks via the vehicle-to-cloud （V2C） approach to improve the delivery quality. Based on this, we propose a lightweight multipath selection strategy to guide the network system to adaptively adjust the forwarding means. Extensive simulations show that the proposed solution can optimize the utilization of network paths, lighten network loads as well as avoid wasting resources.

关键词： information centric networking vehicle-to-cloud multimedia streaming VANET

维普期刊数据库

Distributed Asynchronous Learning for Multipath Data Transmission Based on P-DDQN

在线全文

学校读者我要写书评

暂无评论

China Communications 2021年第8期18卷 62-74页

作者： Kang Liu Wei Quan Deyun Gao chengxiao yu Mingyuan Liu yuming Zhang School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China

Adaptive packet scheduling can efficiently enhance the performance of multipath Data ***,realizing precise packet scheduling is challenging due to the nature of high dynamics and unpredictability of network link *** this end,this paper proposes a distributed asynchronous deep reinforcement learning framework to intensify the dynamics and prediction of adaptive packet *** framework contains two parts:local asynchronous packet scheduling and distributed cooperative control *** local asynchronous packet scheduling,an asynchronous prioritized replay double deep Q-learning packets scheduling algorithm is proposed for dynamic adaptive packet scheduling learning,which makes a combination of prioritized replay double deep Q-learning network(P-DDQN)to make the fitting *** distributed cooperative control center,a distributed scheduling learning and neural fitting acceleration algorithm to adaptively update neural network parameters of P-DDQN for more precise packet *** results show that our solution has a better performance than Random weight algorithm and Round-Robin algorithm in throughput and loss ***,our solution has 1.32 times and 1.54 times better than Random weight algorithm and Round-Robin algorithm on the stability of multipath data transmission,respectively.

关键词： distributed asynchronous learning multipath data transmission deep reinforcement learning

维普期刊数据库

Smart Contract Based DDoS Attack Traceability Audit Mechanism in Intelligent IoT

在线全文

学校读者我要写书评

暂无评论

China Communications 2023年第8期20卷 54-64页

作者： Zhuohao Wang Weiting Zhang Runhu Wang Ying Liu Chenyang Xu chengxiao yu Institute of Scientific and Technical Information of China Beijing 100038China School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijing 100044China

In this paper,we focus on providing data provenance auditing schemes for distributed denial of service(DDoS)defense in intelligent internet of things(IoT).To achieve effective DDoS defense,we introduce a two-layer collaborative blockchain framework to support data ***,using data scattered among intelligent IoT devices,switch gateways self-assemble a layer of blockchain in the local autonomous system(AS),and the main chain with controller participation can be aggregated by its associated layer of blocks once a cycle,to obtain a global security *** optimize the processing delay of the security model,we propose a process of data pre-validation with the goal of ensuring data consistency while satisfying overhead *** the flood of identity spoofing packets,it is difficult to solve the identity consistency of data with traditional detection methods,and accountability cannot be pursued ***,we proposed a Packet Traceback Telemetry(PTT)scheme,based on in-band telemetry,to solve the ***,the PTT scheme is executed on the distributed switch side,the controller to schedule and select routing ***,a tracing probabilistic optimization is embedded into the PTT scheme to accelerate path reconstruction and save device *** results show that the PTT scheme can reconstruct address spoofing packet forward path,reduce the resource consumption compared with existing tracing *** tracing audit method has fine-grained detection and feasible performance.

关键词： smart contract Internet of Things distributed denial of service telemetry audit

维普期刊数据库

Optimization of high-pressure processing-assisted extraction of pectic polysaccharides from three berries

在线全文

学校读者我要写书评

暂无评论

Food Quality and Safety 2023年第1期7卷 1-12页

作者： Xinxin Hu chengxiao yu Shokouh Ahmadi yuying Wang Xingqian Ye Zhiqiang Hou Shiguo Chen College of Biosystems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingZhejiang Engineering Laboratory of Food Technology and EquipmentZhejiang UniversityHangzhouChina Zhejiang University Zhongyuan Institute ZhengzhouChina Shandong(Linyi)Institute of Modern Agriculture Zhejiang UniversityLinyiChina Fuli Institute of Food Science Zhejiang UniversityHangzhouChina Ningbo Research Institute Zhejiang UniversityHangzhouChina

Background and objectives:High-pressure processing(HPP)is a promising assistive method to extract pectic polysaccharides with high rhamnogalacturonan I(RG-I)domain and berries are sources of such pectic *** study extracts pectic polysaccharides from goji berry,raspberry,and cranberry,examines how HPP influences the pectic polysaccharide structure of three berries,and provides a basis for the extraction and modification of pectic polysaccharides with specific structure and *** and methods:An orthogonal test was performed to optimize the HPP-assisted alkali method to extract the high yield and high RG-I content pectic polysaccharides from three *** information of pectic polysaccharides extracted by the HPP method and conventional methods were compared from the perspectives of monosaccharide composition,molecular weight,Fourier transform infrared spectroscopy,***:For raspberry,the optimal conditions consisted of a pressure of 50o MPa,a pH of 13,and a pressure-holding time of 12 min,while the optimal conditions for goji berry and cranberry were both 40o MPa,pH 13,and 15 *** the optimal conditions,the yields for goji berry,raspberry,and cranberry were 10.49%,16.63%,and 17.52%,respectively,and RG-l contents were 81.85%,83.30%,and 63.22%,*** showed an effect to degrade homogalacturonan backbones and side chains and increase the RG-I content to some ***:HPP-assisted alkali method was revealed to be an efficient method to extract high RG-I content pectic polysaccharides,especially for cranberry,and was a potential method to modify pectic polysaccharide structure in a certain way.

关键词： Pectic polysaccharide High-pressure processing Rhamnogalacturonan-I Structural characteristics

A rapid method for extraction,purification and structure analysis of chondroitin sulfate from six marine tissues

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Quality and Safety 2023年第1期7卷 20-29页

作者： yuying Wang Shokouh Ahmadi chengxiao yu Laiming Zhang Xinxin Hu Xingqian Ye Shiguo Chen College of Biosystems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingZhejiang Engineering Laboratory of Food Technology and EquipmentZhejiang UniversityHangzhouChina Zhejiang University Zhongyuan Institute ZhengzhouChina Shandong(Linyi)Institute of Modern Agriculture Zhejiang UniversityLinliChina Fuli Institute of Food Science Zhejiang UniversityHangzhouChina Ningbo Research Institute Zhejiang UniversityHangzhouChina

This study was designed to establish a strategy for the extraction,purification,and structure analysis of chondroitin sulfate(cs)in milligram *** acidic polysaccharides were extracted from six kinds of marine animals by enzymatic hydrolysis and hexadecylpyridinium chloride precipitation and purified by Q Sepharose Fast Flow strong anion exchange *** purification of each crude polysaccharide was completed within 1 *** structure of the polysaccharides,*** chemical characterization,functional group,molecular weight and monosaccharide composition,were analyzed by colorimetry,nuclear magnetic resonace and high-performance liquid chromatogrpahy,*** polysaccharides were identified as *** oligosaccharide profile produced by enzyme hydrolysis of polysaccharides was determined by strong anion-exchange high-performance liquid *** method can be widely applied to the extraction and characterization of chondroitin sulfate from unknown raw materials,screening high-quality sources of functional polysaccharides,and laying a good foundation for thefollowing studyof the structure-function relationshipof polysaccharides.

关键词： Chondroitin sulfate marinepolysaccharide disaccharide analysis

Edible prodelphinidins that improve postprandial hyperglycemia were first discovered in Chinese bayberry(Myrica rubra Sieb. et Zucc.) fruits

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food Science and Human Wellness 2024年

作者： Yi Wang Laiming Zhang Jiaxiong Wu chengxiao yu Xingqian Ye Haibo Pan Shiguo Chen College of Biosystems Engineering and Food Science，Zhejiang Key Laboratory for Agro-Food Processing， Integrated Research Base of Southern Fruit and Vegetable Preservation Technology， Zhejiang International Scientific and Technological Cooperation Base of Health Food Manufacturing and Quality Control， Zhejiang University Ningbo Research Institute， Zhejiang University Zhejiang University Zhongyuan Institute Innovation Center of Yangtze River Delta， Zhejiang University

Plant polyphenols are potential substitutes for clinical α-glucosidase inhibitors. Our previous studies indicated that prodelphinidins from Chinese bayberry leaves (BLPs) have stronger α-glucosidase inhibitory activity than other common polyphenols， but they have no safe history of consumption. There is a reasonable prospect that prodelphinidins from Chinese bayberry fruits (BFPs) can improve postprandial hyperglycemia， though known active components are only myricetin and cyanidin-3-O-glucoside. Hence， the aim of this study was to analyze structure and hypoglycemic effect of BFPs of “Biqi” (BQPs) and “Dongkui” (DKPs) cultivars， and compare their difference with BLPs. The contents of BQPs and DKPs were (221.73±0.60) and (136.82±4.33) mg EC equivalents/g dry weight， respectively. The most subunits were EGCG along with a small amount of EGC， ECG and EC connected by B-type linkages and a small portion of A-type linkages with mean polymerization degree of 4.25 and 4.08， respectively. Importantly， BQPs and DKPs were α-glucosidase inhibitors with IC50of 11.91 and 9.47 μg/mL respectively， which were significantly stronger than BLPs. DKPs could also improve postprandial hyperglycemia of normal mice and high fat diet-induced type Ⅱ diabetic mice. Therefore， edible prodelphinidins， which have stronger hypoglycemic effect than BLPs， were first found in Chinese bayberry fruits.

关键词：

Comparison of Clinical Characteristics and Outcomes of MAFLD and NAFLD in Chinese Health Examination Populations

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 Clinical and Translational Hepatology 2023年第4期11卷 777-786页

作者： Xin Xu Xiaohua Zhou Ting Tian yuqing Ding chengxiao yu Wei Zhao Xiao Wang Jing Lu Wen Guo Longfeng Jiang Quanrongzi Wang Qun Zhang Ci Song Department of Epidemiology Center for Global HealthSchool of Public HealthNanjing Medical UniversityNanjingJiangsuChina The Affiliated Suzhou Hospital of Nanjing Medical University Suzhou Municipal HospitalGusu SchoolNanjing Medical UniversitySuzhouJiangsuChina Department of Infectious Disease the First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Health Promotion Center the First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Radiology the First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina

Background and Aims:The recently proposed concept of metabolic dysfunction-associated fatty liver disease(MAFLD)has remained *** aimed to describe the features and associated outcomes to examine the diagnostic ability of MAFLD for identifying high-risk ***:In this retrospective cohort study,we enrolled 72,392 Chinese participants between 2014 and *** were classified as MAFLD,nonalcoholic fatty liver disease(NAFLD),non-MAFLD-NAFLD,and a normal control *** primary outcomes were liver-related and cardiovascular disease(CVD)***-years of follow-up were calculated from enrolment to the diagnosis of the event,or the last date of data(June,2020).Results:Of the 72,392 participants,31.54%(22,835)and 28.33%(20,507)qualified the criteria for NAFLD or MAFLD,*** with NAFLD,MAFLD patients were more likely to be male,overweight,and have higher biochemical indices including liver enzyme *** MAFLD diagnosed with≥2 or≥3 metabolic abnormalities presented similar clinical *** the median follow-up of 5.22 years,919 incident cases of severe liver disease and 2,073 CVD cases were *** with the normal control group,the NAFLD and MAFLD groups had a higher cumulative risk of liver failure and cardiac-cerebral vascular *** were no significant differences in risk between the non-MAFLD-NAFLD and normal ***-MAFLD group had the highest incidence of liver-related and cardiac-cerebral vascular diseases,lean MAFLD came second,and obese-MAFLD had the lowest ***:This real-world study provided evidence for rationally assessing the benefit and practicability of the change in terminology from NAFLD to *** may be better than NAFLD in identifying fatty liver with worse clinical features and risk profile.

关键词： Metabolic-associated fatty liver disease Non-alcoholic fatty liver disease Liver-related disease Cardiac vascular disease Cerebral vascular disease

Association of Mosaic Chromosomal Alterations and Genetic Factors with the Risk of Cirrhosis

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 Clinical and Translational Hepatology 2024年第6期12卷 562-570页

作者： Xinyuan Ge Lu Zhang Maojie Liu Xiao Wang Xin Xu yuqian Yan Chan Tian Juan Yang Yang Ding chengxiao yu Jing Lu Longfeng Jiang Qiang Wang Qun Zhang Ci Song Department of Epidemiology China International Cooperation Center on Environment and Human HealthCenter for Global HealthSchool of Public HealthNanjing Medical UniversityNanjingJiangsuChina The Dumont-UCLA Transplant Center Division of Liver and Pancreas TransplantationDepartment of SurgeryDavid Geffen School of Medicine at UCLALos AngelesCAUSA Department of Health Promotion Center Jiangsu Province Hospital and Nanjing Medical University First Affiliated HospitalNanjingJiangsuChina Department of Infectious Disease The First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsuChina Department of Clinical Science Intervention and Technology(CLINTEC)Karolinska InstitutetStockholmSweden Changzhou Medical Center Nanjing Medical UniversityNanjingJiangsuChina Research Units of Cohort Study on Cardiovascular Diseases and Cancers Chinese Academy of Medical SciencesBeijingChina Collaborative Innovation Center for Cancer Personalized Medicine Nanjing Medical UniversityNanjingJiangsuChina

Background and Aims:Age-related mosaic chromosomal alterations(mCAs)detected from genotyping of blood-de-rived DNA are structural somatic variants that indicate clonal *** study aimed to investigate whether mCAs contribute to the risk of cirrhosis and modify the effect of a polygenic risk score(PRS)on cirrhosis risk ***:mCA call sets of individuals with European ancestry were obtained from the UK *** PRS was constructed based on 12 susceptible single-nucleotide poly-morphisms for *** proportional hazard models were applied to evaluate the associations between mCAs and cirrhosis ***:Among 448,645 individuals with a median follow-up of 12.5 years,we identified 2,681 cas-es of cirrhosis,1,775 cases of compensated cirrhosis,and 1,706 cases of decompensated *** to non-carriers,individuals with copy-neutral loss of heterozygosity mCAs had a significantly increased risk of cirrhosis(hazard ratio(HR)1.42,95%confidence interval(CI)1.12-1.81).This risk was higher in patients with expanded cell fractions of mCAs(cell fractions≥10%*** fractions<10%),especially for the risk of decompensated cirrhosis(HR 2.03[95%CI 1.09-3.78]vs.1.14[0.80-1.64]).In comparison to non-carriers of mCAs with low genetic risk,individuals with expanded copy-neutral loss of heterozygosity and high genetic risk showed the highest cirrhosis risk(HR5.39[95%CI 2.41-12.07]).Conclusions:The presence of mCAs is associated with increased susceptibility to cirrhosis risk and could be combined with PRS for personalized cirrhosis risk stratification.

关键词： UK Biobank Cirrhosis Mosaic chromosomal alterations Polygenic risk score Genetic susceptibility Interaction effect