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| 1 | Personalized Privacy-Preserving Trajectory Data Publishing显示文摘Due to the popularity of mobile internet and location-aware devices,there is an explosion of location and tra jectory data of moving objects.A few proposals have been proposed for privacy preserving tra jectory data publishing,and most of them assume the attacks with the same adversarial background knowledge.In practice,different users have different privacy requirements.Such non-personalized privacy assumption does not meet the personalized privacy requirements,meanwhile,it looses the chance to achieve better utility by taking advantage of differences of users' privacy requirements.We study the personalized tra jectory k-anonymity criterion for trajectory data publication.Specifically,we explore and propose an overall framework which provides privacy preserving services based on users' personal privacy requests,including tra jectory clustering,editing and publication.We demonstrate the efficiency and effectiveness of our scheme through experiments on real world dataset. | LU Qiwei WANG Caimei XIONG Yan XIA Huihua HUANG Wenchao GONG Xudong | 2017 | Chinese Journal of Electronics2017，26，2： | 6 |
| 2 | A Trusted Ad Hoc Routing Protocol Based on Fuzzy Mathematics显示文摘 | GONG Xudong XIONG Yan LU Qiwei MIAO Puyou HUANG Wenchao | 2013 | Chinese Journal of Electronics2013，22，1： | 5 |
| 3 | Impact of Land Use Change on Vegetation Carbon Storage During Rapid Urbanization:A Case Study of Hangzhou,China显示文摘Land use changes have significant impacts on the carbon balance in an urban ecosystem.When there is rapid development in urbanizing regions,land use changes have a dramatic effect on vegetation carbon storage(VCS).This study investigates the impact of land use change on VCS in a period of rapid urbanization in Hangzhou,China.The results show that:1)from 2000 to 2015,land use in Hangzhou underwent huge changes,mainly reflected in decrease in cropland and wetland and the increased settlement.More than 34.58%of the land was transformed,and the land use changes are primarily characterized by a significant decrease in cropland due to the occupation by settlement.2)over the 15 years,changes in land use led to a decrease of 3.93×10^(5) t of VCS in the urban ecosystem.The large-scale transformation of cropland and wetland,which have a comparatively high carbon density,into land for settlement exerted a negative impact on VCS.3)The central city,which with the Circle-E/I/O mode,had the lowest comprehensive land use dynamic degree,leading to moderate land use change and an increase in VCS;Yuhang and Xiaoshan,which with Multicore-E/O/I mode and Fan-E/O/I modes,had a higher comprehensive land use dynamic degree,drastic changes in land use,and a decrease in VCS.This study proposes a reliable method of estimating changes in VCS,clarifies the relationship between land use change and VCS during rapid urbanization,and provides recommendations for sustainable urban development. | WANG Zhi XU Lihua SHI Yijun MA Qiwei WU Yaqi LU Zhangwei MAO Liwei PANG Enqi ZHANG Qi | 2021 | Chinese Geographical Science2021，31，2： | 3 |
| 4 | Nickel single atom overcoordinated active sites to accelerate the electrochemical reaction kinetics for Li-S cathode显示文摘Lithium-sulfur(Li-S)batteries with high theoretical energy density are promising advanced energy storage devices.However,shuttling of dissolute lithium polysulfide(LiPSs)and sluggish conversion kinetics impede their applications.Herein,single nickel(Ni)atoms on two-dimensional(2D)nitrogen(N)-doped carbon with Ni-N_(4)-O overcoordinated structure(SANi-N_(4)-O/NC)are prepared and firstly used as a sulfur host of Li-S batteries.Due to the efficient polysulfides traps and highly LiPSs conversion effect of SANi-N_(4)-O/NC,the electrochemical performance of Li-S batteries obviously improved.The batteries can well operate even under high sulfur loading(5.8 mg cm^(-2))and lean electrolyte(6.1μL mg^(-1))condition.Meanwhile,density functional theory(DFT)calculations demonstrate that Ni single atom’s active sites decrease the energy barriers of conversion reactions from Li_(2)S_(8)to Li2S due to the strong interaction between SANi-N_(4)-O/NC and LiPSs.Thus,the kinetic conversion of LiPSs was accelerated and the shuttle effect is suppressed on SANi-N_(4)-O/NC host.This study provides a new design strategy for a 2D structure with single-atom overcoordinated active sites to facilitate the fast kinetic conversion of LiPSs for Li-S cathode. | Juan Zhu Xinyue Wang Tian Ke Mingji Jia Biyu Jin Yuanyuan Li Qiwei Yang Lanhui Ren Yongyuan Ren Dangguo Cheng Jianguo Lu Xiang Gao Qinggang He Yang Hou Xiaoli Zhan Qinghua Zhang | 2023 | Journal of Energy Chemistry2023，，3： | 2 |
| 5 | Privacy-Preserving Collaborative Filtering Based on Time-Drifting Characteristic显示文摘Recommendation has become increasingly important because of the information overload. Collaborative filtering(CF) technique, as the most popular recommendation method, utilizes the historical preferences of users to predict their future interests on other items.However, CF technique requires collecting users' rating information, which may lead to the disclosure of privacy. We propose a new randomized perturbation approach Time-drifting privacy-preserving collaborative filtering(TPPCF) to well balance privacy of users and accuracy of recommendation. Since users' recent ratings can better represent their interests and preferences, we incorporate a varying weight into the approach. Specifically, we assign higher weights to more recent ratings both when computing user similarity and perturbing users' ratings. To further improve the efficiency, we cluster the users into several groups to reduce computation cost. We demonstrate the effectiveness and efficiency of our method through experiments on Movie Lens dataset, which shows TPPCF can achieve higher privacy while generating more accurate recommendation. | ZHAO Feng XIONG Yan LIANG Xiao GONG Xudong LU Qiwei | 2016 | Chinese Journal of Electronics2016，25，1： | 2 |
| 6 | 显示文摘 | Lu Qiwei Macosko Christopher W | 2004 | Polymer2004，45，6： | 1 |
| 7 | Comparing the compatibility of various functionalized polypropylencs with thermoplastic polyurethane (TPU)显示文摘 | Lu Qiwei Macosko C W | 2004 | Polymer2004，45，6： | 1 |
| 8 | Cyan Droid: stable and effective energy inefficiency diagnosis for Android apps显示文摘Smartphones are an indispensable part of people's daily lives. Smartphone apps often use phone sensors to probe their users' physical environmental conditions to provide services. However, sensing operations can be energy-consumptive, and thus the obtained sensory data should be effectively utilized by apps for their users' benefits. Existing studies disclosed that many real-world smartphone apps have poor utilization of sensory data, and this causes serious energy waste. To diagnose such energy bugs, a recent technique GreenD roid automatically generates sensory data, tracks their propagation and analyzes their utilization in an app. However,we observe that GreenD roid's sensory data generation is random and this can negatively affect its stability and effectiveness. Our study reported that GreenD roid might miss energy bugs that require specific sensory data to manifest. To address this problem, we propose a novel approach to systematically generating multi-dimensional sensory data. For effective diagnosis, we also propose to consider app state changes at a finer granularity. We implemented our approach as a prototype tool CyanD roid, and evaluated it using four real-world Android apps and hundreds of their mutants. Our results confirmed that CyanD roid is more stable and effective in energy inefficiency diagnosis for sensory data underutilization issues. | Qiwei LI Chang XU Yepang LIU Chun CAO Xiaoxing MA Jian LU | 2017 | Science China(Information Sciences)2017，60，1： | 1 |
| 9 | Flexible multilayer lead-free film capacitor with high energy storage performances via heterostructure engineering显示文摘The immense potential of flexible energy storage materials applied in wearable electronic devices hasstimulated a lot of science researches on manufacturing technology and performance optimization.Herein, an all-inorganic flexible ferroelectric film with multilayer heterostructure is prepared based onMn doped Bi0.5Na0.5TiO_(3)eBiNi0.5Zr0.5O_(3) (Mn:BNT-BNZ) and Bi0.5Na0.5TiO_(3)eBiZn0.5Zr0.5O_(3) (BNT-BZZ)relaxor ferroelectrics. A win-win situation of breakdown strength and polarization is achieved in theMn:BNT-BNZ/BNT-BZZ multilayer film with the stacking period N - 3, of which energy density and ef-ficiency reach 80.4 J/cm3 and 62.0% respectively. It is proposed that the excellent energy storage per-formances are attributed to the synergistic effect of the electric field amplification effect, interfaceblocking effect and the polarization coupling effect based on the multilayer heterostructure. Moreover,the flexible ferroelectric film exhibits outstanding temperature (25e205 - C), frequency (0.5e5 kHz)stability and antifatigue property (1 108 cycles), and can well maintain stable performance at differenttensile/compressive bending radii (10e5 mm) and even after 104 bending cycles with a fixed bendingradius of 3 mm. This work opens up a promising route to the development of flexible energy storagematerials. | Ningning Sun Jinhua Du Ye Zhao Chunxiao Lu Pei Han Yong Li Qiwei Zhang Xihong Hao | 2022 | Journal of Materiomics2022，8，4： | 1 |
| 10 | A new concept of endoscopic lung cancer resection: Single-direction thoracoscopic lobectomy显示文摘 | Lunxu Liu Guowei Che Qiang Pu Lin Ma Yigen Wu Qiwei Kan Xuepeng Zhuge Lu Shi | 2009 | Surgical Oncology2009，，2： | 1 |
| 11 | A Secure Adaptive Routing Strategy Using Immune Mechanism in MANET显示文摘 | HU Yiqing XIONG Yah LU Qiwei GONG Xudong HUANG Wenchao | 2013 | Chinese Journal of Electronics2013，22，4： | 1 |
| 12 | Aligned Organization of Synapses and Mitochondria in Auditory Hair Cells显示文摘Recent studies have revealed great functional and structural heterogeneity in the ribbon-type synapses at the basolateral pole of the isopotential inner hair cell(IHC).This feature is believed to be critical for audition over a wide dynamic range,but whether the spatial gradient of ribbon morphology is fine-tuned in each IHC and how the mitochondrial network is organized to meet local energy demands of synaptic transmission remain unclear.By means of three-dimensional electron microscopy and artificial intelligence-based algorithms,we demonstrated the cell-wide structural quantification of ribbons and mitochondria in mature mid-cochlear IHCs of mice.We found that adjacent IHCs in staggered pairs differ substantially in cell body shape and ribbon morphology gradient as well as mitochondrial organization.Moreover,our analysis argues for a location-specific arrangement of correlated ribbon and mitochondrial function at the basolateral IHC pole. | Jing Liu Shengxiong Wang Yan Lu Haoyu Wang Fangfang Wang Miaoxin Qiu Qiwei Xie Hua Han Yunfeng Hua | 2022 | Neuroscience Bulletin2022，38，3： | 1 |
| 13 | Hydrogen-bonded metal-nucleobase frameworks for highly selective capture of ethane/propane from methane and methane/nitrogen separation显示文摘The separation of light hydrocarbons,including C_(2)H_(6)and C_(3)H_(8),is essential to natural gas upgrading.Meanwhile,N_(2)removal from CH_(4)is also crucial to concentrating low-quality coalbed methane,but the adsorption process is challenging because of the close kinetic diameter.This work reports two hydrogen-bonded metal-nucleobase frameworks(HOF-ZJU-201 and HOF-ZJU202)capable of efficiently separating C_(3)H_(8)/CH_(4),C_(2)H_(6)/CH_(4),and CH_(4)/N_(2).Due to strong affinity for C_(3)H_(8)and C_(2)H_(6),the lowpressure capacity for C_(3)H_(8)(5 kPa)and C_(2)H_(6)(10 kPa)of HOF-ZJU-201a exceeds most adsorbents.The ideal adsorbed solution theory(IAST)selectivity of C_(3)H_(8)/CH_(4)and C_(2)H_(6)/CH_(4)is 119 and 45 at ambient conditions.According to density functional theory calculations,surface polarization environments formed by electron-rich anions and electron-deficient purine heterocyclic rings contribute to the selective capture of C_(3)H_(8)and C_(2)H_(6)with greater polarizability.Furthermore,the high CH_(4)adsorption capacity(1.73 mmol/g for HOF-ZJU-201a and 1.50 mmol/g for HOF-ZJU-202a at 298 K and 1.0 bar)and excellent CH_(4)/N_(2)selectivity(6.0 for HOF-ZJU-201 at 298 K),as well as dynamic breakthrough experiments of binary CH_(4)/N_(2)gas mixture implied their efficacy in the concentration of low-quality coalbed methane. | Ying Liu Qianqian Xu Lihang Chen Changhua Song Qiwei Yang Zhiguo Zhang Dan Lu Yiwen Yang Qilong Ren Zongbi Bao | 2022 | Nano Research2022，15，8： | 0 |
| 14 | Methodology of Sports Science Research in China──Abstracted from the keynote Speech of China's 4th National Sports Science Conference Held on 8 December, 1992显示文摘According to the characteristics of sports science research and in the light of the current development of our times, the paper discussed the important role of methodology in sports science research. While reviewing the significant progress made in China in research methods of sports science, the paper also pointed out some deficiencies in methodology and in the applicstion of specific methods. The paper expolinded that the development of sports in our country had made high demands of our times on scientific research method. It also encouraged sports scientists to make every effort to improve methodology so as to establish and develop our own sports science school in China. | TIAN Maijiu MA Qiwei ZHANG Liwei TIAN Ye LU Yuanzhen PU Junzong ZHANG Mingli (54 years old, PhD. professor) | 1995 | 北京体育大学学报1995，18，S2： | 0 |
| 15 | Dipyridyl Azo Compound 4,4'-Azopyridine as a Potential Coating Material for Toilet Sanitizer显示文摘Good toilet hygiene can reduce the risk of pathogenic transmission.During flushing,pathogenic bacteria can be spread by the water droplets,especially in the toilet seat.Escherichia coli(E.coli)is one of the frequently occurring Gram-negative bacterial pathogens found in the toilet seats.In this study,we investigated the potential anti-E.coli activity of some azobenzene compounds.Among them,compound 2,with the heterocyclic nitrogen in both phenyl rings,showed the strongest antibacterial effect on E.coli,with the minimum inhibitory concentration of 80μg/mL and the minimum bactericidal concentration of 320μg/mL.Compound 2 displayed a comparative zone of clearance[(14.50±2.29)mm]to that of ampicillin[(13.17±1.76)mm].The reactive oxygen species(ROS)assay suggested that compound 2 might induce the loss of bacteria via the oxidative stress by eliciting the generation of intracellular ROS.We further examined the potential cytotoxicity of compound 2 to the human skin HaCaT cells.Compound 2-treated skin cells showed a good maintenance of cellular morphology and a clear definition of cell nuclei,with a satisfactory cell viability(ca.90%)at 80μg/mL.Overall,compound 2 would be a possible antibacterial coating agent for the surface sanitizer of the toilet seats to inhibit the growth of E.coli. | WANG Qiwei JIANG Lu LAM Pik-Ling CHUI Chung-Hin WONG Wai-Yeung | 2023 | Chemical Research in Chinese Universities2023，39，6： | 0 |
| 16 | Highly efficient and anti-poisoning single-atom cobalt catalyst for selective hydrogenation of nitroarenes显示文摘Developing non-precious metal catalysts to selectively reduce functionalized nitroarenes with high efficiency is urgently desirable for the production of value-added amines.Herein,we report a novel,efficient,anti-poisoning single-atom cobalt catalyst(Co-NAC)for the highly selective hydrogenation of the nitro to amino group for nitroarenes baring various functional groups,including vinyl,cyano,and halogen.Using a combination of structure characterization techniques,we have confirmed that the cobalt species are predominantly present in the form of four-coordinated Co single sites anchored on nitrogen-assembly carbon(NAC)as the ordered mesoporous support.Co-NAC catalysts enable the full conversion and>99%selectivity with molecular H2 as a green reductant under mild conditions(80℃,2 MPa H2).As for the selective hydrogenation of 3-nitrostyrene,Co-NAC catalyst affords high catalytic productivity(19.7 h-1),which is superior to the cobalt nanoparticles(NPs)catalysts and most of the recently reported Co-based catalysts.This is attributed to the highly accessible atomically-dispersed Co active sites,the high surface area with ordered-mesoporous morphology and the prominent high content of nitrogen dopants.Notably,Co-NAC catalyst displays resistance towards sulfur-containing poisons(20 equivalents)and strong non-oxidizing acid(8 M),showing great potential for continuous application in the chemical industry. | Yuemin Lin Renfeng Nie Yuting Li Xun Wu Jiaqi Yu Shaohua Xie Yajing Shen Shanjun Mao Yuzhuo Chen Dan Lu Zongbi Bao Qiwei Yang Qilong Ren Yiwen Yang Fudong Liu Long Qi Wenyu Huang Zhiguo Zhang | 2022 | Nano Research2022，15，12： | 0 |
| 17 | Highly efficient sono-piezo-photo synergistic catalysis in bismuth layered ferroelectrics via finely distinguishing sonochemical and electromechanochemical processes显示文摘Ultrasonic stimulation induced polarization behaviors in ferroelectric materials have been extensively explored in catalytic degradations.However,the ultrasonic wave similarly can realize dye degradation by the sonocatalysis behavior,which is always neglected in most reports on in-situ ultrasound-induced piezoelectric catalysis,so that people might overestimate piezocatalytic contributions.For this,we designed a series of visible light sensitive bismuth layered ferroelectric materials(BLFMs),M_(0.5)Bi_(2.5)Nb_(2)O_(9)(MBN,M=Li,Na,and K).It is found that the cavitation-induced degradation rates of Rhodamine B(RhB)strongly depend mechanical stirring speeds under a fixed ultrasonic power,which gradually increases with it,and reaches 77.9%(500 rpm and 3 h).Under lower stirring speed and reaction time(<50 rpm and 2 h),the cavitation effect is almost negligible,only piezocatalysis behavior occurs,which can be used as a key condition to distinguish the piezocatalysis and sonocatalysis.In particular,the degradation rate constant of Na_(0.5)Bi_(2.5)Nb_(2)O_(9) catalyst reaches up to 4.943×10^(-2) min^(-1) by the coupling of sonocatalysis,piezocatalysis and photocatalysis,which is much higher than that of single photocatalysis(0.491×10^(-2) min^(-1)),piezocatalytic(1.6×10^(-3) min^(-1)),and sonocatalysis(0.756×10^(-2) min^(-1)).These results may provide a feasible strategy of further improving catalytic degradation efficiency,and accurately determining the sonocatalysis and piezocatalysis contribution. | Lizhen Lu Nan Liang Haiqin Sun Qiwei Zhang Xihong Hao | 2022 | Journal of Materiomics2022，8，1： | 0 |
| 18 | Research on two-dimensional fluid vibration axial transmission path model of axial piston pump显示文摘High speed and high pressure can enhance the vibration of axial piston pump. A fluid vibration transmission law of axial piston pump is studied in this paper. According to harmonic response analysis results, a transmission path analysis is used to establish a two-dimensional fluid vibration transmission path model in the vertical plane, which has characteristics of multi excitation sources, multi-path and multi-receptors. Model parameters are obtained by experimental and numerical analysis. Matlab is used to solve the model, and acceleration vibration response of three shells is got. To reduce the effect of mechanical vibration, the surface acceleration of pump is tested under low speed condition. Results show that the model can accurately reveal transmission law of fluid vibration and the accuracy is more than 90%. The research lays a foundation for exploring vibration transmission law and vibration control. | 权凌霄 Bai Ruxia Zhang Qiwei Liu Song Lu Yueliang | 2019 | High Technology Letters2019，25，1： | 0 |
| 19 | Room-temperature hydrogenation of halogenated nitrobenzenes over metal-organic-framework-derived ultra-dispersed Ni stabilized by N-doped carbon nanoneedles显示文摘Ultra-dispersed Ni nanoparticles(7.5 nm)on nitrogen-doped carbon nanoneedles(Ni@NCNs)were prepared by simple pyrolysis of Ni-based metal–organic-framework for selective hydrogenation of halogenated nitrobenzenes to corresponding anilines.Two different crystallization methods(stirring and static)were compared and the optimal pyrolysis temperature was explored.Ni@NCNs were systematically characterized by wide analytical techniques.In the hydrogenation of p-chloronitrobenzene,Ni@NCNs-600(pyrolyzed at 600°C)exhibited extraordinarily high performance with 77.9 h^(–1)catalytic productivity and>99%p-chloroaniline selectivity at full p-chloronitrobenzene conversion under mild conditions(90°C,1.5 MPa H2),showing obvious superiority compared with reported Ni-based catalysts.Notably,the reaction smoothly proceeded at room temperature with full conversion and>99%selectivity.Moreover,Ni@NCNs-600 afforded good tolerance to various nitroarenes substituted by sensitive groups(halogen,nitrile,keto,carboxylic,etc.),and could be easily recycled by magnetic separation and reused for 5 times without deactivation.The adsorption tests showed that the preferential adsorption of–NO2 on the catalyst can restrain the dehalogenation of p-chloronitrobenzene,thus achieving high p-chloroaniline selectivity.While the high activity can be attributed to high Ni dispersion,special morphology,and rich pore structure of the catalyst. | Yuemin Lin Yuanyuan Zhang Renfeng Nie Kai Zhou Yao Ma Mingjie Liu Dan Lu Zongbi Bao Qiwei Yang Yiwen Yang Qilong Ren Zhiguo Zhang | 2022 | Frontiers of Chemical Science and Engineering2022，16，12： | 0 |
| 20 | A Secure Distributed Authentication Scheme Based on CRT-VSS and Trusted Computing in MANET显示文摘With the rapid development of Mobile ad hoc network(MANET), secure and practical authentication is becoming increasingly important. There still exist several unsolved problems. It may suffer from cheating problems and Denial of services(Do S) attacks towards authentication service. Most existing schemes do not have satisfactory efficiency due to the exponential arithmetic complexity of Shamir's scheme. We explore the property of Verifiable secret sharing(VSS) schemes with Chinese remainder theorem(CRT), then propose a secret key distributed storage scheme based on CRT-VSS and trusted computing techniques. We discuss the homomorphism property of CRT-VSS and design a secure distributed Elliptic curve-digital signature standard(ECCDSS) authentication scheme. We provide formal guarantees towards the scheme proposed in this paper. | WANG Xingfu LU Qiwei XIONG Yan MIAO Fuyou HUANG Wenchao LIU Tao WU Xuangou | 2014 | Chinese Journal of Electronics2014，23，2： | 0 |
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