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| 1 | Service-aware 6G:An intelligent and open network based on the convergence of communication,computing and caching显示文摘With the proliferation of the Internet of Things(IoT),various services are emerging with totally different features and requirements,which cannot be supported by the current fifth generation of mobile cellular networks(5G).The future sixth generation of mobile cellular networks(6G)is expected to have the capability to support new and unknown services with changing requirements.Hence,in addition to enhancing its capability by 10–100 times compared with 5G,6G should also be intelligent and open to adapt to the ever-changing services in the IoT,which requires a convergence of Communication,Computing and Caching(3C).Based on the analysis of the requirements of new services for 6G,this paper identifies key enabling technologies for an intelligent and open 6G network,all featured with 3C convergence.These technologies cover fundamental and emerging topics,including 3C-based spectrum management,radio channel construction,delay-aware transmission,wireless distributed computing,and network self-evolution.From the detailed analysis of these 3C-based technologies presented in this paper,we can see that although they are promising to enable an intelligent and open 6G,more efforts are needed to realize the expected 6G network. | Yiqing Zhou Ling Liu Lu Wang Ning Hui Xinyu Cui Jie Wu Yan Peng Yanli Qi Chengwen Xing | 2020 | Digital Communications and Networks2020，6，3： | 57 |
| 2 | An experimental study of the dual-loop control of electro-hydraulic load simulator (EHLS)显示文摘This paper investigates motion coupling disturbance(the so called surplus torque)in the hardware-in-the-loop(HIL)experiments.The‘‘velocity synchronization scheme’’was proposed by Jiao for an electro-hydraulic load simulator(EHLS)in 2004.In some situations,however,the scheme is limited in the implementation for certain reasons,as is the case when the actuator’s valve signal is not available or it is seriously polluted by noise.To solve these problems,a‘‘dual-loop scheme’’is developed for EHLS.The dual-loop scheme is a combination of a torque loop and a position synchronization loop.The role of the position synchronization loop is to decouple the motion disturbance caused by the actuator system.To verify the feasibility and effectiveness of the proposed scheme,extensive simulations are performed using AMESim.Then,the performance of the developed method is validated by experiments. | Wang Chengwen Jiao Zongxia Wu Shuai Shang Yaoxing | 2013 | Chinese Journal of Aeronautics2013，26，6： | 15 |
| 3 | A practical nonlinear robust control approach of electro-hydraulic load simulator显示文摘This paper studies a nonlinear robust control algorithm of the electro-hydraulic load simulator(EHLS). The tracking performance of the EHLS is mainly limited by the actuator's motion disturbance, flow nonlinearity, and friction, etc. The developed controller is developed based on the nonlinear motion loading model. The problems of the actuator's disturbance and flow nonlinearity are considered. To address the friction problem, the friction model of the loading motor is identified experimentally. The friction disturbance is compensated using the obtained friction model. Therefore, this paper considers the main three factors comprehensively. The developed algorithm is easy to apply since the controller can be obtained just with one step back-stepping design. The stability of the developed algorithm is proven via Lyapunov analysis. Both co-simulation and experiments are performed to verify the effectiveness of this method. | Wang Chengwen Jiao Zongxia Wu Shuai Shang Yaoxing | 2014 | Chinese Journal of Aeronautics2014，27，3： | 10 |
| 4 | Distributed cooperative localization based on Gaussian message passing on factor graph in wireless networks显示文摘In conventional localization, agents may not be able to reach sufficient number of anchors to obtain unambiguous locations, especially in sparse networks. Cooperative localization is a promising solution in that harsh environment, which enables the agents to cooperate with each other by exchanging location information and performing range measurements. In this paper, a distributed cooperative localization method based on factor graph is proposed in wireless networks. Gaussian parametric messages are used to represent the messages passed on factor graph. However, because of the nonlinear observation model, no closed-form solutions can be obtained. To solve this problem, the Taylor expansion is used to approximate the nonlinear terms in message updating, which leads to the Gaussian message passing on factor graph. Accordingly, only two parameters of the Gaussian distribution have to be transmitted and the communication overhead for localization can be significantly reduced. The two proposed algorithms for the application with accurate and inaccurate anchors,respectively, are evaluated by Monte Carlo simulations and compared with the SPAWN and maximum likelihood(ML) estimator. The results show that the proposed algorithms can perform very close to SPAWN with much lower computational complexity, and it outperforms the ML estimator significantly. | WU Nan LI Bin WANG Hua XING ChengWen KUANG JingMing | 2015 | Science China(Information Sciences)2015，58，4： | 4 |
| 5 | Effect of HCO_3^- concentration on CO_2 corrosion in oil and gas fields显示文摘The effect of HCO_3^- concentration on CO_2 corrosion was investigated by polarization measurement of potentiodynamic scans and weight-loss method. Under the conditions of high pressure and high temperature, the corrosion rate of steel X65 decreased with the increase of HCO_3^- concentration, while pH of solution increased. SEM, EDS, and XRD results of the corrosion scales indicated that the typical FeCO_3 crystallite was found at low HCO_3^- concentration but Ca(Fe,Mg)(CO_3)_2 was found at high HCO_3^- concentration. Ca^(2+) and Mg^(2+) are precipitated preferential to Fe^(2+) at high pH value. Potentiodynamic polarization curves showed that the cathodic current density decreases with the increase of HCO_3^- concentration at low HCO_3^- concentration. When the HCO_3^- concentration reaches 0.126 mol/L, increasing HCO_3^- concentration promotes cathodic reactions. Anodic behavior is an active process at low HCO_3^- concentration and the anodic current density decreases with the increase of HCO_3^- concentration. An evident active-passive behavior is exhibited in anodic process at 0.126 mol/L HCO_3^- | Guoan Zhang Minxu Lu Chengwen Chai Yinshun Wu | 2006 | Journal of University of Science and Technology Beijing2006，13，1： | 4 |
| 6 | S OC Testing methodology and Practice显示文摘 | WU Chengwen | 2005 | Automation and Test in Europe Conference and Exhibition (DATE''05) proceedings2005，2，： | 1 |
| 7 | Effects of Octreotide on Activated Pancreatic Stellate Cell-Induced Pancreas Graft Fibrosis in Rats显示文摘 | Dan Long Jun Lu Lei Luo Yingjia Guo Chengwen Li Wenqiao Wu Juan Shan LuLu Li Shengfu Li YouPing Li Tao Lin Li Feng | 2012 | Journal of Surgical Research2012，，1： | 1 |
| 8 | Enhanced dynamic deformability and strengthening effect via twinning and microbanding in high density NiCoFeCrMoW high-entropy alloys显示文摘High density alloys with enhanced deformability and strength are urgently required in energy,military and nuclear industries,etc.In this work,we present a new kind of NiCoFeCrMoW high entropy alloys(HEAs)which possess higher densities and sound velocities than copper.We systematically investigate the phase structure,quasi-static tensile,dynamic compression and related deformation mechanism of these HEAs.It is shown that single FCC or FCC+μdual phases were formed in the HEAs depending on Mo and W content and annealing temperature.Excellent quasi-static tensile and dynamic compression properties have been achieved for these HEAs,e.g.Ni_(30)Co_(30)Fe_(21)Cr_(10)W_(9)HEA annealed at 1573 K exhibited a yield and ultimate tensile strength and elongation of~364 MPa,~866 MPa and~32%,respectively,in quasi-static test;a yield strength of~710 MPa and no fracture under the dynamic strain rate of 4100 s^(-1).Superior strain rate sensitivity(SRS)of yield strength than that of previously reported FCC HEAs have been evidenced.The dynamic stress-strain constitutive relation can be described by the modified Johnson-Cook model.As for the dynamic deformation mechanism,it is envisaged that the regulation of stacking fault energy and Peierls barrier in current HEAs resulted in occurrences of abundant nanoscale deformation twins and microbands during high strain rate compression.The synergistic microbanding and twinning effectively contributes to the enhanced dynamic deformability and strengthening effect.Besides,the interactions of dislocations with precipitates,stacking faults(SFs)with twins,and between SFs also contribute to extraordinary work-hardening capacity. | Xuli Liu Yidong Wu Yansong Wang Jinbin Chen Rui Bai Lei Gao Zhe Xu William Yi Wang Chengwen Tan Xidong Hui | 2022 | Journal of Materials Science & Technology2022，，32： | 1 |
| 9 | Do CD4 + Foxp3 + Treg cells correlate with transplant outcomes: A systematic review on recipients of solid organ transplantation显示文摘 | Juan Shan Yinjia Guo Lei Luo Jun Lu Chengwen Li Chuntao Zhang Yuchuan Huang Li Feng Wenqiao Wu Dan Long Shengfu Li Youping Li | 2011 | Cellular Immunology2011，，1： | 1 |
| 10 | 人胆囊癌耐砷细胞株的建立及其凋亡相关基因差异表达检测(英文)显示文摘Objective:The aim of the study was to establish an arsenic trioxide(ATO)-resistant cell line of human gallbladder carcinoma,GBC-SD/ATO,and to analyze the differential expressions of its apoptosis-associated genes,so as to investigate a correlation between ATO induced resistance of gallbladder carcinoma and expressions of apoptosis associated genes.Methods:The resistant cell line was obtained in vitro by culture of human gallbladder carcinoma cell line GBC-SD with increasingly stepwise concentrations of ATO.The sensitivities of GBC-SD cells and GBC-SD/ATO cells to ATO were determined by MTT assay respectively.cDNA microarray containing 458 apoptosis-related human genes was used to compare the gene expression profiles of GBC-SD/ATO cells and corresponding sensitive cell line GBC-SD.Results:GBC-SD/ATO cell line was established successfully after 8 months of exposure to increasing concentrations of ATO.Compared with the parental cell line,GBC-SD/ATO was 13.6 times more resistant to ATO.Of the 458 apoptosis-related genes,17 genes were detected having > 2-fold difference of expression between the GBC-SD/ATO and GBC-SD cells,with 6 genes up-regulated and 11 genes down-regulated in GBC-SD/ATO cells.Conclusion:The 17 genes involved in the apoptosis pathway might be relevant to the resistance of GBC-SD/ATO cells to ATO,suggesting that the modulation of expression of apoptosis-related genes may be a main mechanism of acquired resistance in GBC-SD/ATO. | Dalong Wu Xiaowei He Chengwen Zhang | 2010 | The Chinese-German Journal of Clinical Oncology2010，9，2： | 1 |
| 11 | The domain Ⅲ fragment of Japanese en cephalitis virus envelope protein:mouse immunogenicity and liposome adjuvanticity显示文摘 | WU SUH-CHIN YU CHING-HUNG LIN CHENGWEN | 2003 | Vaccine2003，21，： | 1 |
| 12 | Adding power of artificial intelligence to situational awareness of large interconnections dominated by inverter‐based resources显示文摘Large‐scale power systems exhibit more complex dynamics due to the increasing inte-gration of inverter‐based resources(IBRs).Therefore,there is an urgent need to enhance the situational awareness capability for better monitoring and control of power grids dominated by IBRs.As a pioneering Wide‐Area Measurement System,FNET/GridEye has developed and implemented various advanced applications based on the collected synchrophasor measurements to enhance the situational awareness capability of large‐scale power grids.This study provides an overview of the latest progress of FNET/GridEye.The sensors,communication,and data servers are upgraded to handle ultra‐high density synchrophasor and point‐on‐wave data to monitor system dynamics with more details.More importantly,several artificial intelligence(AI)‐based advanced appli-cations are introduced,including AI‐based inertia estimation,AI‐based disturbance size and location estimation,AI‐based system stability assessment,and AI‐based data authentication. | Lin Zhu Yinfeng Zhao Yi Cui Shutang You Wenpeng Yu Shengyuan Liu He Yin Chang Chen Yuru Wu Wei Qiu Mirka Mandich Hongyu Li Adedasola Ademola Chengwen Zhang Chujie Zeng Xinlan Jia Weikang Wang Haoyu Yuan Huaiguang Jiang Jin Tan Yilu Liu | 2021 | High Voltage2021，6，6： | 0 |
| 13 | The impact of ultrasonic treatment on activity of ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in activated sludge显示文摘The ultrasonic treatment of sludge has been considered as an effective method to facilitate the partial nitritation of municipal sewage.This study aims to reveal the effects of ultrasound on ammoniaoxidizing bacteria(AOB)and nitrite-oxidizing bacteria(NOB).The impact factors including ultrasonic irradiation time and intensity,sludge concentration,thermal effect and released free radicals were studied.The maximized difference between the changes in AOB and NOB activities were obtained with 10 g mixed liquor suspended solids(MLSS)/L,using 0.9 kJ/mL ultrasonic energy density and 12 h interval time.The increased ultrasonic intensity destroyed the floc structure of activated sludge,increased the microbial death,and decreased the cellular ATP level.Further,the mechanism exploration indicated that the mechanical shearing could be a critical factor in achieving the nitritation with inhibitory effect on nitrite oxidation. | Siqi Li Min Zheng Shuang Wu Yu Xue Yanchen Liu Chengwen Wang Xia Huang | 2019 | Frontiers of Environmental Science & Engineering2019，13，6： | 0 |
| 14 | 氯喹衍生物CQ11逆转乳腺癌多药耐药细胞株MCF/DOX对多柔比星的耐药性(英文)显示文摘Objective: To investigate the reversal effect of CQ11, a chloroquine derivative, on multidrug resistance (MDR) in doxorubicin (DOX)-resistant human breast carcinoma cell line MCF/DOX. Methods: Cells of a human breast cancer cell line, MCF, and its DOX-resistant variant, MCF/DOX, were cultivated with DOX and /or CQ11. The cytotoxicity of drugs in vitro was assayed by MTT method. The accumulation of DOX in these cells was detected by fluorescence spectrophotometer. Results: MCF/DOX cells were 119 times more resistant to DOX in comparison with MCF cells. After simultaneous treatment with CQ11 at the concentrations of 1.0, 2.5 and 5.0 μmol/L, the IC50 of DOX for MCF/DOX cells decreased from 3.1 ± 0.47 μmol/L to 0.58 ± 0.032, 0.19 ± 0.012 and 0.081 ± 0.015 μmol/L, respectively, thus, increasing the DOX sensitivity by 5.3-fold (P < 0.01), 16- fold (P < 0.01) and 38-fold (P < 0.01), respectively. In the accumulation assay of DOX, simultaneous incubation of MCF/DOX cells with CQ11 significantly increased the DOX accumulation in MCF/DOX cells. No such results were found in parental MCF cells. Conclusion: CQ11 had strong MDR reversal effect by enhancing intracellular DOX accumulation in MCF/DOX cells, indicating that CQ11 may be a promising MDR chemosensitivity. | Dalong Wu Shirong Ma Fengying Sui Chengwen Zhang Lixin Yin Huanzhang Lu | 2008 | The Chinese-German Journal of Clinical Oncology2008，7，11： | 0 |
| 15 | From binary to ternary and back to binary:Transition of electromagnetic wave shielding to absorption among MAB phase Ni_(3)ZnB_(2)and corresponding binary borides Nin+1Bn(n=1,3)显示文摘Due to chemical inertness of nickel and boron,the preparation of nickel borides and corresponding layered ternary transition metal borides Ni_(3)ZnB_(2)(MAB phase)has always required high-temperature and/or high-pressure conditions.Yet,an innovative and efficient approach to preparing Ni_(3)ZnB_(2)at only 600℃and without applied pressure is presented in this study.It is discovered that by simply adjusting the temperature,a phase transition from Ni_(3)ZnB_(2)to Ni4B3 with a layered structure could be induced.This transition between the binary-component and the ternary-component brings about significant variation in electromagnetic wave(EMW)shielding/absorption performance of prepared borides.For instance,Ni2B has good EMW shielding performance(42.54 dB in X band)and Ni_(3)ZnB_(2)is of weak EMW shielding(13.43 dB in X band);Ni_(3)ZnB_(2)has poor EMW absorption performance(−5 dB)while Ni4B3 has excellent EMW absorption performance(−45.19 dB)at a thickness of 2.7 mm with effective absorption bandwidth(10.4 GHz). | Chengwen Wu Fan Zhang Qin Zhi Bo Song Yongqiang Chen Hailong Wang Rui Zhang Hongxia Li Bingbing Fan | 2023 | Journal of Advanced Ceramics2023，12，11： | 0 |
| 16 | Numerical Characterization of the Annular Flow Behavior and Pressure Loss in Deepwater Drilling Riser显示文摘In drilling a deepwater well,the mud density window is narrow,which needs a precise pressure control to drill the well to its designed depth.Therefore,an accurate characterization of annular flow between the drilling riser and drilling string is critical in well control and drilling safety.Many other factors influencing the change of drilling pressure that should be but have not been studied sufficiently.We used numerical method to simulate the process of drill string rotation and vibration in the riser to show that the rotation and transverse vibration of drill string can increase the axial velocity in the annulus,which results in the improvement of the flow field in the annulus,and the effect on pressure loss and its fluctuation amplitude.In addition,there are also multiple secondary flow vortices in the riser annulus under certain eccentricity conditions,which is different from the phenomenon in an ordinary wellbore.The findings of this research are critical in safely controlling well drilling operation in the deepwater environment. | Chengwen Liu Lin Zhu Xingru Wu Jian Liang Zhaomin Li | 2020 | Computer Modeling in Engineering & Sciences2020，，8： | 0 |
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