检索结果-南通市图书馆

Motivations of Chinese Outward Direct Investment:The Sector Perspective

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2016年第3期29卷 698-721页

作者： wang yali SHAO Yanmin School of Economics and Management Beihang University Academy of Mathematics and Systems Science Chinese Academy of Sciences Center for Forecasting Science Chinese Academy of Sciences

From the sector perspective of mining, manufacturing and services, the motivations of Chinese outward direct investment （further ODI） are discussed during the period from 2001 to 2012, acknowledging different host countries and firms＇ ownership structures. The estimated results justify that the location determinants of Chinese ODI differ between sectors, which implies tile motivation behind such investment may vary. As expected, resource-seeking is the most important motivation for Chinese ODI in mining sector; market- and strategic asset-seeking motivations are possessed by both manufacturing and services sectors. The probability of the host country receiving Chinese FDI, as well as high FDI openness and frequent bilateral trade with China is favorable for doing business. Results also suggest that the factors increasing the probability of a country being chosen as a location for Chinese ODI vary between different host countries, as do different ownership structures.

关键词： Chinese ODI doing business market-seeking resource-seeking strategic asset-seeking.

Dynamic Compression Behavior of Ultra-high Performance Cement-based Composite with Hybrid Steel Fiber Reinforcements

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2020年第5期35卷 900-907页

作者： RONG Zhidan wang yali WU Shenping School of Materials Science and Engineering Southeast UniversityNanjing 211189China Jiangsu Key Laboratory of Construction Materials Southeast UniversityNanjing 21189China

Ultra-high performance cement-based composites (UHPCC) is promising in construction of concrete structures that suffer impact and explosive *** this study,a reference UHPCC mixture with no fiber reinforcement and four mixtures with a single type of fiber reinforcement or hybrid fiber reinforcements of straight smooth and end hook type of steel fibers were *** Hopkinson pressure bar (SHPB) was performed to investigate the dynamic compression behavior of UHPCC and X-CT test and 3D reconstruction technology were used to indicate the failure process of UHPCC under impact *** show that UHPCC with 1% straight smooth fiber and 2% end hook fiber reinforcements demonstrated the best static and dynamic mechanical *** the hybrid steel fiber reinforcements are added in the concrete,it may need more impact energy to break the matrix and to pull out the fiber reinforcements,thus,the mixture with hybrid steel fiber reinforcements demonstrates excellent dynamic compressive performance.

关键词： ultra-high performance cement-based composite dynamic compression behavior hybrid fiber reinforcements split Hopkinson pressure bar

Providing Delay-Guaranteed Multicast Transmission Services for an SDN-Based Publish/Subscribe System

在线全文

学校读者我要写书评

暂无评论

China Communications 2019年第12期16卷 176-187页

作者： yali wang Shuangxi Hong Junna Zhang College of Computer and Information Engineering Henan Normal UniversityXinxiang 450002China Engineering Laboratory of Intellectual Business and Internet of Things Technologies Henan ProvinceChina

Providing end-to-end delay guarantees in traditional Internet is a complex task due to the distributed nature of TCP/IP protocols. Software Defined Networking(SDN) gives a new dimension to improve QoS(Quality of Service) as it can benefit from its flexibility, programmability and centralized view. In this paper, we provide delay-guaranteed data transmission service instead of "best efforts" service for a topic-based publish/subscribe system by means of exploring these specific features of SDN. We attribute this routing problem in such conditions to Delay-Constraint Lowest Cost Steiner Tree(DCLCST) problem. To solve it, we compute the shortest delay paths from source node to every subscribe node and the shortest cost paths from every subscribe node to any other node using dijkstra algorithm. Then we construct a delay-constraint least cost steiner tree for per-topic based on these paths as multicast tree. We also present experimental results to demonstrate the effectiveness of the algorithms and methods we proposed.

关键词： minimum steiner tree multicast routing publish/subscribe system overlay network

An SDN-Based Publish/Subscribe-Enabled Communication Platform for IoT Services

在线全文

学校读者我要写书评

暂无评论

China Communications 2018年第1期15卷 95-106页

作者： yali wang Yang Zhang Junliang Chen State Key Laboratory of Networking and Switching technology Beijing University of Posts and Telecommunications Beijing 100876 China College of Computer and Information Engineering Henan Normal University Xinxiang Henan 453007 China

Publish/subscribe paradigm paves a way to integrate and serve many scalable, inter-operable Internet of Things(IoT) applications. The increasing IoT applications require new properties of publish/subscribe communication model, for example, strict quality of service(Qo S) guarantees, supporting a large number of widely distributed devices, etc. Software Defined Networking(SDN) enables personalized programming and individualized QoS supports for different applications. The combination of the two will have a good prospect. In this paper, we present an IoT-oriented communication platform which combines the publish/subscribe paradigm with SDN, aiming at establishing an IoT ecosystem to facilitate IoT services/applications accessing internet. We design the interaction logic of topic-based publish/subscribe middleware, and describe the setup and maintenance of topology information as well as event routing in detail, considering the characteristics of SDN. Finally, we exemplify its practicability with a deployed District Heating Control and Information Service System(DHCISS) and validity the effectiveness with some experiments.

关键词： IoT publish/subscribe paradigm QoS guarantee software defined networking

Effect of alkali-activation on aluminosilicate-based cementitious materials

在线全文

学校读者我要写书评

暂无评论

Journal of University of Science and Technology Beijing 2008年第6期15卷 796-801页

作者： Xiaoguang Yang Wen Ni Xufang Zhang yali wang School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China Central Research Institute of Building and Construction Co. Ltd. MCC Group Beijing 100088 China

High-performance aluminosilicate-based cementitious materials were produced with fly ash from a coal power plant as one of the major raw materials. The structures of fly ash containing aluminosilicate-based cementitious materials were compared before and after treatment by the methods of nuclear magnetic resonance （NMR） and scanning electron microscopy （SEM）. During the 28 d curing time, the compressive strength of water glass and fly ash samples increased from 9.08 MPa to 26.75 MPa. The results show that most of the stiff shells are destroyed after mechanical grinding and chemical activation. Magic angle spinning （MAS） NMR of 27Al shows that the wide peak becomes narrow and the main peak shifts to the direction of low field, indicating the decrease of polymerization degree, the enhancing of activity, the decrease of six-coordination structure, and the increase of small and symmet- rical four-coordination polyhedron structure within the aluminum-oxygen polyhedron network. Comparisons between MAS NMR of 29Si with different treatments suggest that QO disappears, the quantity of Q2 increases, and the quantity of Q4 decreases. The polymerization degree of silicon-oxygen is reduced, and the potential activity of fly ash is increased.

关键词： fly ash modification alkali activation water glass

Effect of Xinfeng capsule in the treatment of active rheumatoid arthritis: a randomized controlled trial

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2015年第6期35卷 626-631页

作者： wang yali Liu Jian wang Yuan Sun Yue Rheumatism Department Anhui University of Chinese Medicine Department of Rheumatism Immunity The First Affiliated HospitalAnhui University of Chinese Medicine

OBJECTIVE: To explore the use of Xinfeng capsule(XFC) in the treatment of active rheumatoid arthritis(RA) and its effect on immunoglobulin titer, B cell-activating factor(BAFF) and its receptor(BAFF-R).METHODS: A multi-center randomized, doubleblind, parallel-controlled study was conducted. 45 RA patients were assigned to two groups: one was treated with XFC plus the placebo for leflunomide(LEF) and the second group was treated with LEF plus XFC placebo, for 12 weeks. The clinical and laboratory parameters were collected at baseline and at 12 ***: After 12 weeks of treatment, patients in the two groups all showed an therapeutic effect when ACR20, ACR50 and ACR70 were compared,but the differences between two groups were not significant(P < 0.05). The serum levels of Ig G1,BAFF and BAFF-R in the XFC group were lower than those in the LEF group(P < 0.05). The level Ig G subtypes correlated with clinical parameters; Ig G2 levels positively correlated with C-reactive protein(CRP)(P < 0.01); Ig G3 levels positively correlated with white blood cell count and CRP(P < 0.01);Ig G4 levels positively correlated with Complement4( C4)(P < 0.01); the level of BAFF negatively correlated with Lymphocyte( LYMPH#)(P < 0.01); however,BAFF-Rpositivelycorrelatedwith Platelet( PLT)and a1-acid glycoprotein(AGP)(P < 0.01).CONCLUSION: XFC can regulate the level of BAFF/BAFF-R in active rheumatoid arthritis and improve the levels of immunoglobulins in RA patients.

关键词： Arthritis, rheumatoid Xinfeng capsule Immunoglobulins Randomized controlled trial

Towards robustness and generalization of point cloud representation:A geometry coding method and a large-scale object-level dataset

在线全文

学校读者我要写书评

暂无评论

Computational Visual Media 2024年第1期10卷 27-43页

作者： Mingye Xu Zhipeng Zhou yali wang Yu Qiao Guangdong-Hong Kong-Macao Joint Laboratory of Human-Machine Intelligence-Synergy Systems Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518000China University of Chinese Academy of Sciences Beijing065001China Shanghai AI Laboratory Shanghai200001China SIAT Branch Shenzhen Institute of Artificial Intelligence and Robotics for SocietyShenzhen518000China Alibaba DAMO Academy Hangzhou242332China

Robustness and generalization are two challenging problems for learning point cloud *** tackle these problems,we first design a novel geometry coding model,which can effectively use an invariant eigengraph to group points with similar geometric information,even when such points are far from each *** also introduce a large-scale point cloud dataset,*** consists of 184 categories and 51,915 synthetic objects,which brings new challenges for point cloud classification,and provides a new benchmark to assess point cloud cross-domain ***,we perform extensive experiments on point cloud classification,using ModelNet40,ScanObjectNN,and our PCNet184,and segmentation,using ShapeNetPart and *** method achieves comparable performance to state-of-the-art methods on these datasets,for both supervised and unsupervised *** and our dataset are available at https://***/MingyeXu/PCNet184.

关键词： geometry coding self-supervised learning point cloud classification segmentation 3D analysis

Adaptive augmentation of gain-scheduled controller for aerospace vehicles

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 Systems Engineering and Electronics 2013年第2期24卷 272-280页

作者： Xiyuan Huang Qing wang yali wang Yanze Hou Chaoyang Dong School of Automation Science and Electrical Engineering Beihang University R&D Center China Academy of Launch Vehicle Technology Beijing Institute of Electronic System Engineering Institute of Manned Space System Engineering China Academy of Space Technology School of Aeronautic Science and Engineering Beihang University

This paper proposes an adaptive augmentation control design approach of the gain-scheduled *** extension is motivated by the need for augmentation of the baseline gainscheduled *** proposed approach can be utilized to design flight control systems for advanced aerospace vehicles with a large parameter *** flight dynamics within the flight envelope is described by a switched nonlinear system,which is essentially a switched polytopic system with *** flight control system consists of a baseline gain-scheduled controller and a model reference adaptive augmentation controller,while the latter can recover the nominal performance of the gainscheduled controlled system under large *** the multiple Lyapunov functions method,it is proved that the switched nonlinear system is uniformly ultimately *** validate the effectiveness of the proposed approach,this approach is applied to a generic hypersonic vehicle,and the simulation results show that the system output tracks the command signal well even when large uncertainties exist.

关键词： adaptive control gain-scheduled control flight envelope aerospace vehicle

Approved HIV reverse transcriptase inhibitors in the past decade

在线全文

学校读者我要写书评

暂无评论

Acta Pharmaceutica Sinica B 2022年第4期12卷 1567-1590页

作者： Guangdi Li yali wang Erik De Clercq Hunan Provincial Key Laboratory of Clinical Epidemiology Xiangya School of Public HealthCentral South UniversityChangsha 410078China Rega Institute for Medical Research Department of MicrobiologyImmunology and TransplantationKU LeuvenLeuven B-3000Belgium

HIV reverse transcriptase(RT)inhibitors are the important components of highly active antiretroviral therapies(HAARTs)for anti-HIV treatment and pre-exposure prophylaxis in clinical *** RT inhibitors and their combination regimens have been approved in the past ten years,but a review on their drug discovery,pharmacology,and clinical efficacy is ***,we provide a comprehensive review of RT inhibitors(tenofovir alafenamide,rilpivirine,doravirine,dapivirine,azvudine and elsulfavirine)approved in the past decade,regarding their drug discovery,pharmacology,and clinical efficacy in randomized controlled *** RT inhibitors such as islatravir,MK-8504,MK-8507,MK8583,IQP-0528,and MIV-150 will be also *** development may focus on the new generation of novel antiretroviral inhibitors with higher bioavailability,longer elimination half-life,more favorable side-effect profiles,fewer drug–drug interactions,and higher activities against circulating drug-resistant strains.

关键词： HIV treatment HAART NRTI NNRTI Clinical efficacy