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| 1 | On Reliability-optimized Controller Placement for Software-Defined Networks显示文摘By decoupling control plane and data plane,Software-Defined Networking(SDN) approach simplifies network management and speeds up network innovations.These benefits have led not only to prototypes,but also real SDN deployments.For wide-area SDN deployments,multiple controllers are often required,and the placement of these controllers becomes a particularly important task in the SDN context.This paper studies the problem of placing controllers in SDNs,so as to maximize the reliability of SDN control networks.We present a novel metric,called expected percentage of control path loss,to characterize the reliability of SDN control networks.We formulate the reliability-aware control placement problem,prove its NP-hardness,and examine several placement algorithms that can solve this problem.Through extensive simulations using real topologies,we show how the number of controllers and their placement influence the reliability of SDN control networks.Besides,we also found that,through strategic controller placement,the reliability of SDN control networks can be significantly improved without introducing unacceptable switch-to-controller latencies. | HU Yannan WANG Wendong GONG Xiangyang QUE Xirong CHENG Shiduan | 2014 | China Communications2014，11，2： | 25 |
| 2 | Monitoring strata behavior due to multi-slicing top coal caving longwall mining in steeply dipping extra thick coal seam显示文摘For studying the strata behavior due to multi-slicing top coal caving longwall mining along-the-strike direction in steeply dipping extra thick coal seams,the shield support pressures of the upper and lower slices of panel 37220 in Dongxia Coal Mine were monitored using the KJ513 dynamic monitoring system.The set up rooms adopted the 'horizontal line-arc segment-inclined line' form and used different types of shield supports.The results show that the strata pressure of upper slice panel 37220-1 changed slightly along the strike direction,while along the dip direction it exhibited strong to weak pressure from bottom to top.The first weighting interval of lower slice panel 37220-2 was about 60.8 m,and the average periodic weighting interval were about 22.6 m.The strata behavior of panel 37220-2 exhibited a spatiotemporal characteristic in that periodic weighting occurred first in the middle-upper part,followed by the middle and upper parts,arc segment,and finally the lower part.During the periodic weighting,the weighting interval and intensity also exhibited strong space characteristics.The average dynamic load coefficient was 1.48 and the maximum lateral load of the side shield was 20-25 MPa. | Yun Dongfeng Liu Zhu Cheng Wendong Fan Zhendong Wang Dongfang Zhang Yuanhao | 2017 | International Journal of Mining Science and Technology2017，27，1： | 5 |
| 3 | 北斗导航系统卫星激光测距综述显示文摘Satellite laser ranging(SLR)is an unambiguous measurement technique and generates high accuracy satellite orbit data.All satellites in the BeiDou navigation satellite system(BDS)carried laser retro-reflector arrays(LRAs),so they can be tracked by ground SLR stations in order to provide the accurate observation data.The Shanghai astronomical observatory(SHAO)designed the LRAs,and also developed the dedicated SLR systems using a 1 m-aperture telescope and a transportable cabin-based SLR system with a telescopes of 60 cm aperture.These enable BDS satellite ranging during daytime and nighttime with centimeter-level precision,allowing highly accurate estimations of satellite orbits.Moreover,some of the BDS satellites are also equipped with laser time transfer(LTT)payloads,which were developed by the SHAO and China Academy of Space Technology(CAST),providing a highly accurate time comparison between the satellites and ground clocks.This paper describes the dedicated SLR system and the design of the LRAs for BDS satellites,as well as global SLR measurements.The SLR tracking data is used for evaluating the orbit accuracy of BDS satellites and broadcast ephemeris,with an accuracy of less than 1 m.The LTT measurements to BDS satellites for a single shot have a precision of approximately 300 picoseconds,with a time stability of 20 picoseconds in 500 s. | ZHANG Haifeng LONG Mingliang YANG Huafeng MENG Wendong CHENG Zhi’en DENG Huarong ZHANG Zhongping ZHANG A’li | 2020 | Aerospace China2020，21，4： | 4 |
| 4 | Ganoderma lucidum spore oil(GLSO),a novel antioxidant,extends the average life span in Drosophila melanogaster显示文摘In ancient China,Ganoderma lucidum was believed to be a medical fungus that could increase lifespan.Recently,pharmacologic studies have found that polysaccharide peptides and triterpenoids extracted from Ganoderma lucidum have various physiological effects as active compounds.However,the effects of spore oil isolated from Ganoderma lucidum remains unknown.In this study,the biological effects of Ganoderma lucidum spore oil(GLSO)were evaluated using a Drosophila melanogaster model.Compared with untreated groups,groups treated with GLSO had significantly longer average and maximum lifespan in both normal conditions and under oxidative stress.The activities of various antioxidant enzymes were measured to determine the antioxidant effect of GLSO.GLSO treatment markedly enhanced total superoxide dismutase(SOD)and catalase(CAT)activity and decreased levels of malondialdehyde(MDA).Further,we found dose-dependent increases in the mRNA expression of Cu,Zn-SOD,Mn-SOD,and CAT in GLSO-treated groups.These results suggest that GLSO may effectively eliminate free radicals and extend lifespan in Drosophila.Future work should investigate the value of GLSO as a functional food for the prevention of aging in larger animal models. | Yi Zhang Hongfei Cai Zhu Tao Cheng Yuan Zhaojian Jiang Juyan Liu Hiroshi Kurihara Wendong Xu | 2021 | Food Science and Human Wellness2021，10，1： | 3 |
| 5 | Active probing based Internet service fault management in uncertain and noisy environment显示文摘In Internet service fault management based on active probing,uncertainty and noises will affect service fault management. In order to reduce the impact,challenges of Internet service fault management are analyzed in this paper. Bipartite Bayesian network is chosen to model the dependency relationship between faults and probes,binary symmetric channel is chosen to model noises,and a service fault management approach using active probing is proposed for such an environment. This approach is composed of two phases:fault detection and fault diagnosis. In first phase,we propose a greedy approximation probe selection algorithm(GAPSA) ,which selects a minimal set of probes while remaining a high probability of fault detection. In second phase,we propose a fault diagnosis probe selection algorithm(FDPSA) ,which selects probes to obtain more system information based on the symptoms observed in previous phase. To deal with dynamic fault set caused by fault recovery mechanism,we propose a hypothesis inference algorithm based on fault persistent time statistic(FPTS) . Simulation results prove the validity and efficiency of our approach. | CHU LingWei ZOU ShiHong CHENG ShiDuan WANG WenDong | 2008 | Science in China(Series F)2008，51，11： | 2 |
| 6 | The progress of laser ranging technology at Shanghai Astronomical Observatory显示文摘As an important station of International Laser Ranging Service(ILRS),Shanghai Astronomical Observatory(SHAO)has upgraded Satellite Laser Ranging(SLR)system with high repetition rate and achieved some technological progress,There are a lot of improvements for overall system performance,such as annual observation passes,measurement precision and quality of observation data.SLR technology with repetition rate of 10 kHz is accomplished firstly in China,and space debris laser ranging technology with200 Hz laser is promoted and proved to be more detective for weak echo,which lead to successful measurement for 40,000 km satellites and space debris within 3000 km.At the same time,SLR based on multi-telescopes and 1064 nm wavelength are planned to make a breakthrough of detection capabilities,and also to expand its application fields.These progresses will be introduced in this paper in detail. | Zhibo Wu Haifeng Zhang Huarong Deng Mingliang Long Zhien Cheng Zhongping Zhang Wendong Meng | 2019 | Geodesy and Geodynamics2019，10，6： | 1 |
| 7 | Auction-based Security Game for Multiuser Cooperative Networks显示文摘 | An Wang Yueming Cai Wendong Yang Yunpeng Cheng | 2013 | Frequenz (-)2013，，5： | 1 |
| 8 | On the feasibility and efficacy of control traffic protection in software-defined networks显示文摘Software Defined Networking(SDN) is an emerging networking paradigm that assumes a logically centralized control plane separated from the data plane. Despite all its advantages, separating the control and data planes introduces new challenges regarding resilient communications between the two. That is, disconnections between switches and their controllers could result in substantial packet loss and performance degradation.This paper addresses this challenge by studying the issue of control traffic protection in SDNs with arbitrary numbers of controllers. Specifically, we propose a control traffic protection scheme that combines both local rerouting and constrained reverse path forwarding protections, through which switches can locally react to failures and redirect the control traffic using standby backup forwarding options. Our goal is then to find a set of primary routes for control traffic, called protected control network, where as many switches as possible can benefit from the proposed protection scheme. We formulate the protected control network problem, prove its NP-hardness, and develop an algorithm that reconciles protectability and performance(e.g., switch-to-control latency). Through extensive simulations based on real topologies, we show that our approach significantly improves protectability of control traffic. The results should help further the process of deploying SDN in real-world networks. | HU YanNan WANG WenDong GONG XiangYang QUE XiRong CHENG ShiDuan | 2015 | Science China Chemistry2015，58，12： | 1 |
| 9 | Event-Based User Classification in WeiboMedia 显示文摘 | Liang Guo Wendong Wang Shiduan Cheng Xirong Que Don-Lin Yang | 2014 | The Scientific World Journal2014，，2014： | 1 |
| 10 | Dynamic Model and Motion Characteristics of an Underwater Glider with Manta-inspired Wings显示文摘An underwater glider with bionic wings controlled by two operating modes is proposed to perform a variety of marine exploration tasks.The system composition of the vehicle and the structural design of wings inspired by manta ray are presented.The bionic wings can keep outstretched or realize oscillating motions according to the operating modes of the vehicle.A universal dynamic model of the vehicle was derived from multibody theory.Gliding,sailing and steering motions were simulated based on the dynamic model to illustrate the dynamic behaviors of the vehicle under different types of propulsion techniques.The results obtained through simulated calculation are basically consistent with the experimental data,which indicate that the developed dynamic model is applicable to describe the motion characteristics of the vehicle.Experiments were conducted in coastal area to analyze the propulsive characteristics of the bionic wings and sea trials involving multifarious motions were carried out,the applicability of the vehicle in marine environment was verified. | Yaqiang Zhu Yuhong Liu Lianhong Zhang Yanhui Wang Wendong Niu Cheng Huang | 2022 | Journal of Bionic Engineering2022，19，1： | 1 |
| 11 | Weak Expansive Soil Physical Properties Modification by Means of a Cement-Jute Fiber显示文摘Sixteen groups of comprehensive tests have been conducted to investigate the modifications in the physical properties of a weak expansive soil due to the addition of a cement jute fiber.The tests have been conducted to analyze the liquid plastic limit,the particle distribution and the free expansion rate.The results show that:(1)With an increase in the cement-jute fiber content,the free expansion rate of the modified expansive soil gradually decreases,however,such a rate rebounds when the fiber content exceeds 0.5%and the cement content exceeds 6%.(2)With an increase in the cement percentage,the particle unevenness coefficient(Cu)and curvature coefficient(Cc)of the modified expansive soil tend to grow gradually.The Cc coefficient reaches 1.0 when the cement content is 6%.The unevenness coefficient of 16 soil samples is greater than 5.0,however,the Cu coefficient decreases when the cement content reaches 6%.(3)The plastic limit of soil increases as the cement content is made higher,while the liquid limit and plastic index decrease gradually.When the content of the modified material is 2%+0.1%~2%+0.7%(Cement content+jute fiber content),the change of particle size distribution is most obvious.(4)When the contents of cement and jute fiber are is 6%and 0.5%,respectively,the modification induced in the physical properties of soil samples corresponds to the best case. | Zisheng Yang Wendong Li Xuelei Cheng Ran Hai Shunqun Li | 2023 | Fluid Dynamics & Materials Processing2023，19，8： | 0 |
| 12 | NEW ARCHITECTURE OF IP QOS MANAGEMENT SYSTEM显示文摘Based on the analysis of current Quality of Service (QoS) management on IP network, new genera-tion of QoS architecture QoSAF is proposed. QoSAF is divided into three layers: resource control layer, net-work service layer and business layer. QoS management is accomplished by interactivity of layers. In this ar-chitecture, mechanism of feedback control enhances the functions of resource management and system moni-toring. The principle of design and logical architecture of system is discussed in detail. | Jiao Li Cui Yidong Lin Yu Wang Wendong Cheng Shiduan | 2006 | Journal of Electronics(China)2006，23，4： | 0 |
| 13 | One-dimensional metallic, magnetic, and dielectric nanomaterialsbased composites for electromagnetic wave interference shielding显示文摘The excrescent electromagnetic(EM)radiation exposure in the air threatens human health and electronic equipment due to the abuse of EM waves in wireless telecommunication technology and electronic applications.Consequently,electromagnetic interference(EMI)shielding materials are provided to solve the EM waves pollution problem.In particular,the appearance of onedimensional(1D)metallic,magnetic,and dielectric nanofillers will extremely reduce the density of EMI composite and enhance EMI protection performance because they can easily assemble to form complete two-dimensional(2D)or three-dimensional(3D)EMI network based on their high aspect ratio,large specific surface area,and additional attenuated sites.This review focuses on the EMI shielding composites with 1D metallic,magnetic,and dielectric nanofillers,which could be constructed in the final form of membrane-or aerogel/sponge-like shielding materials.According to the structural features,1D metallic,magnetic,and dielectric nanofillers are classified into nanowires,nanorods,nanospindles,nanochains,nanofibers,nanotubes,nanorings,nanocoils,and quasi-one-dimensional(1D)van der Waals materials.Accordingly,the fabricated routes,shielding performances,and EM waves attenuation mechanism of the 1D metallic,magnetic,and dielectric nanofiller-based composites are summarized.It is found that the dominant shielding mechanism of most of the 1D metal-based EMI composites is reflection loss,while that of 1D magnetic and dielectric nanomaterials-based EMI composites is absorption loss caused by interfacial polarization,natural resonance,eddy current,and multiple scattering.Finally,the challenges and prospects of 1D nanofiller-based composites with a tunable architecture and composition are put forward,aiming to give a guideline for the next generation of high-performance EMI shielding materials. | Ya Cheng Wendong Zhu Xiaofeng Lu Ce Wang | 2022 | Nano Research2022，15，10： | 0 |
| 14 | Pulse electrochemical synaptic transistor for supersensitive and ultrafast biosensors显示文摘High sensitivity and fast response are the figures of merit for benchmarking commercial sensors.Due to the advantages of intrinsic signal amplification,bionic ability,and mechanical flexibility,electrochemical transistors(ECTs)have recently gained increasing popularity in constructing various sensors.In the current work,we have proposed a pulse-driven synaptic ECT for supersensitive and ultrafast biosensors.By pulsing the presynaptic input(drain bias,VD)and setting the modulation potential(gate bias)near transconductance intersection(VG,i),the synaptic ECT-based pH sensor can achieve a record high sensitivity up to 124 mV pH^(-1)(almost twice the Nernstian limit,59.2 mV pH^(-1))and an ultrafast response time as low as 8.75 ms(7169 times faster than the potentiostatic sensors,62.73 s).The proposed synaptic sensing strategy can effectively eliminate the transconductance fluctuation issue during the calibration process of the pH sensor and significantly reduce power consumption.Besides,the most sensitive working point at VG,i has been elaborately figured out through a series of detailed mathematical derivations,which is of great significance to provide higher sensitivity with quasi-nonfluctuating amplification capability.The proposed electrochemical synaptic transistor paired with an optimized operating gate offers a new paradigm for standardizing and commercializing high-performance biosensors. | Jianlong Ji Zhenxing Wang Fan Zhang Bin Wang Yan Niu Xiaoning Jiang Zeng-ying Qiao Tian-ling Ren Wendong Zhang Shengbo Sang Zhengdong Cheng Qijun Sun | 2023 | InfoMat2023，5，11： | 0 |
| 15 | A 1-bp deletion in the MC04g1399 is highly associated with failure to produce fruit wart in bitter gourd显示文摘Fruit wart is an important appearance trait influencing consumer preferences of bitter gourd(Momordica charantia L.).The molecular genetic mechanisms underlying fruit wart formation in bitter gourd are largely unknown.In this study,genetic analysis based on four generations showed that fruit wart formation in bitter gourd was controlled by a single dominant locus named as Fwa.The Fwa locus was initially mapped into a 4.82 Mb region on pseudochromosome 4 by BSA-seq analysis and subsequently narrowed down to a 286.30 kb region by linkage analysis.A large F2population consisting of 2360 individuals was used to screen recombinants,and the Fwa locus was finally fine mapped into a 22.70 kb region harboring four protein-coding genes through recombination analysis.MC04g1399,encoding an epidermal patterning factor 2-like protein,was proposed as the best candidate gene for Fwa via sequence variation and expression analysis.In addition,a 1-bp insertion and deletion(InDel)variation within MC04g1399 was converted to a cleaved amplified polymorphic sequence(CAPS)marker that could precisely distinguish between the warty and non-warty types with an accuracy rate of 100%among a wide panel of 126 bitter gourd germplasm resources.Our results not only provide a scientific basis for deciphering the molecular mechanisms underlying fruit wart formation but also provide a powerful tool for efficient genetic improvement of fruit wart via marker-assisted selection. | Jia Liu Junjie Cui Jichi Dong Jian Zhong Chunfeng Zhong Fanchong Yuan Wendong Guan Fang Hu Jiaowen Cheng Kailin Hu | 2024 | Horticultural Plant Journal2024，10，1： | 0 |
| 16 | Effects of Additives on the Microstructure and Tribology Performance of Ta-12W Alloy Micro-Arc Oxidation Coating显示文摘Oxide ceramic coatings were fabricated on tantalum alloys by micro-arc oxidation (MAO) to improve their hardness and tribological properties. The MAO coatings were manufactured in a mixed silicatephosphate electrolyte containing NaF and/or EDTA (ethylene diamine tetraacetic acid). The surface morphology,cross-sectional view, chemical composition, hardness, and wear performance of the coatings were analysed. As revealed by the scanning electron microscopy, silica-rich nodules appear on the MAO coating obtained in the silicate-phosphate electrolyte, but the formation of nodules is inhibited with NaF and/or EDTA in the electrolyte.Also, they reduce the roughness and improve the compactness of the coatings, which are composed of Ta_(2)O_(5),(Ta, O), and TaO. A thick and hard coating is obtained in the NaF-containing electrolyte, and the tribology performance is effectively improved. With additives, the nodule structure is detached from the coating surface and dissolved in the electrolyte. By using NaF as an electrolyte additive, the abrasion performance of the MAO coating is enhanced by decreasing the nodule structure, increasing the size of micropores, and improving the coating hardness. | 刘玲 HU Changgang CHENG Wendong 刘兴泉 | 2024 | Journal of Wuhan University of Technology(Materials Science)2024，39，1： | 0 |
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