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| 1 | Design of Time-constrained Guidance Laws via Virtual Leader Approach显示文摘Guidance problems with flight time constraints are considered in this article.A new virtual leader scheme is used for design of guidance laws with time constraints.The core idea of this scheme is to adopt a virtual leader for real missiles to convert a guidance problem with time constraints to a nonlinear tracking problem,thereby making it possible to settle the problem with a variety of control methods.A novel time-constrained guidance(TCG) law,which can control the flight time of missiles to a prescribed time,is designed by using the virtual leader scheme and stability method.The TCG law is a combination of the well-known proportional navigation guidance(PNG) law and the feedback of flight time error.What's more,this law is free of singularities and hence yields better performances in comparison with optimal guidance laws with time constraints.Nonlinear simulations demonstrate the effectiveness of the proposed law. | Zhao Shiyu Zhou Rui Wei Chen Ding Quanxin | 2010 | Chinese Journal of Aeronautics2010，23，1： | 36 |
| 2 | Dynamic attack zone of air-to-air missile after being launched in random wind field显示文摘A new concept is presented for air-to-air missile which is dynamic attack zone after being launched in random wind field. This new concept can be used to obtain the 4-dimensional(4-D)information regarding the dynamic envelope of an air-to-air missile at any flight time aimed at different flight targets considering influences of random wind, in the situation of flight fighters cooperated with missiles fighting against each other. Based on an air-to-air missile model, some typical cases of dynamic attack zone after being launched in random wind field were numerically simulated.Compared with the simulation results of traditional dynamic envelope, the properties of dynamic attack zone after being launched are as follows. The 4-D dynamic attack zone after being launched is inside traditional maximum dynamic envelope, but its forane boundary is usually not inside traditional no-escape dynamic envelope; Traditional dynamic attack zone can just be reliably used at launch time, while dynamic envelope after being launched can be reliably and accurately used during any flight antagonism time. Traditional envelope is a special case of dynamic envelope after being launched when the dynamic envelope is calculated at the launch time; the dynamic envelope after being launched can be influenced by the random wind field. | Hui Yaoluo Nan Ying Chen Shaodong Ding Quanxin Wu Shengliang | 2015 | Chinese Journal of Aeronautics2015，28，5： | 16 |
| 3 | A closed-loop process for recycling LiNi_xCo_yMn_((1-x-y))O_2 from mixed cathode materials of lithium-ion batteries显示文摘With the rapid development of consumer electronics and electric vehicles(EV), a large number of spent lithium-ion batteries(LIBs) have been generated worldwide. Thus, effective recycling technologies to recapture a significant amount of valuable metals contained in spent LIBs are highly desirable to prevent the environmental pollution and resource depletion. In this work, a novel recycling technology to regenerate a LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material from spent LIBs with different cathode chemistries has been developed. By dismantling, crushing,leaching and impurity removing, the LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2(selected as an example of LiNi_xCo_yMn_(1-x-y)O_2) powder can be directly prepared from the purified leaching solution via co-precipitation followed by solid-state synthesis. For comparison purposes, a fresh-synthesized sample with the same composition has also been prepared using the commercial raw materials via the same method. X-ray diffraction(XRD), scanning electron microscopy(SEM) and electrochemical measurements have been carried out to characterize these samples. The electrochemical test result suggests that the re-synthesized sample delivers cycle performance and low rate capability which are comparable to those of the freshsynthesized sample. This novel recycling technique can be of great value to the regeneration of a pure and marketable LiNi_xCo_yMn_(1-x-y)O_2 cathode material with low secondary pollution. | Rujuan Zheng Wenhui Wang Yunkun Dai Quanxin Ma Yuanlong Liu Deying Mu Ruhong Li Jie Rena Changsong Dai | 2017 | Green Energy & Environment2017，2，1： | 11 |
| 4 | Andrographolide inhibits NF-KB activation and attenuates neointimal hyperplasia in arterial restenosis显示文摘 | YuJiu Wang Jin Tao Wang QuanXin Fan Jian Guo Geng | 2007 | Cell Research2007，17，11： | 10 |
| 5 | Wide-steering-angle high-resolution optical phased array显示文摘Optical phased array(OPA)technology is considered a promising solution for solid-state beam steering to supersede the traditional mechanical beam steering.As a key component of the LIDAR system for long-range detection,OPAs featuring a wide steering angle and high resolution without beam aliasing are highly desired.However,a wide steering range requires a waveguide pitch less than half of the wavelength,which is easily subjected to cross talk.Besides,high resolution requires a large aperture,and it is normally achieved by a high count number of waveguides,which complicates the control system.To solve the mentioned issues,we design two high-performance 128-channel OPAs fabricated on a multilayered SiN-on-SOI platform.Attributed to the nonuniform antenna pitch,only 128 waveguides are used to achieve a 4 mm wide aperture.Besides,by virtue of innovative dual-level silicon nitride(Si_(3)N_(4))waveguide grating antennas,the fishbone antenna OPA achieves a 100°×19.4°field of view(FOV)with divergence of 0.021°×0.029°,and the chain antenna OPA realizes a 140°×19.23°FOV with divergence of 0.021°×0.1°.To our best knowledge,140°is the widest lateral steering range in two-dimensional OPA,and 0.029°is the smallest longitudinal divergence.Finally,we embed the OPA into a frequency-modulated continuous-wave system to achieve 100 m distance measurement.The reflected signal from 100 m distance is well detected with 26 dBm input transmitter power,which proves that OPA serves as a promising candidate for transceiving optical signal in a LIDAR system. | YINGZHI LI BAISONG CHEN QUANXIN NA QIJIE XIE MIN TAO LANXUAN ZHANG ZIHAO ZHI YUXUAN LI XIAOBIN LIU XIANSHU LUO GUOQIANG LO FENGLI GAO XUEYAN LI JUNFENG SONG | 2021 | Photonics Research2021，9，12： | 7 |
| 6 | An Effective RAID Data Layout for Object-Based De-duplication Backup System显示文摘We propose an alternative Redundant array of independent disks(RAID) data layout, Asymmetrical grouping data organization(AGDO), for object-based data de-duplication backup system. Object-based data deduplication is an effective solution for detecting duplicate data for compound files. We designed an asymmetrical grouping strategy, the disk in the array are partitioned into different groups, and in each group parallelism data access scheme is adopted, different types of objects are stored in different groups with maybe different group size, it can set and manage dynamic group size by using dynamic disk group adjustment algorithms. The performance of AGDO is evaluated and proved to be sufficient for the continuous storage application. The result is that disk accesses are concentrated in a part of the disks over a long time period and reduces the power consumption to 25% in a 10-disk configuration. Moreover, object-based de-duplication combined with AGDO has great potential in increasing data restoration speed for compound files. We have shown that this combination makes average restoration speed improved 11%. | YAN Fang TAN Yu'an ZHANG Quanxin WU Fei CHENG Zijing ZHENG Jun | 2016 | Chinese Journal of Electronics2016，25，5： | 5 |
| 7 | Stability of nonlinear impulsive stochastic systems with Markovian switching under generalized average dwell time condition显示文摘This paper examines the p-th moment globally asymptotic stability in probability and p-th moment stochastic input-to-state stability for a type of impulsive stochastic system with Markovian switching.By applying the generalized average dwell time approach, some novel sufficient conditions are obtained to ensure these stability properties. Furthermore, the coefficient of the Lyapunov function is allowed to be time-varying, which generalizes and improves the existing results. As corollaries, nonlinear restrictions on the drift and diffusion coefficients are used as substitutes for some previous conditions. Two examples are provided to illustrate the effectiveness of the theoretical results. | Xiaozheng FU Quanxin ZHU | 2018 | Science China(Information Sciences)2018，61，11： | 5 |
| 8 | A High-Performance Hierarchical Snapshot Scheme for Hybrid Storage Systems显示文摘With the increased snapshot operations(creation or deletion), the performance of storage system will degrade severely whether in Copy on write(COW)or Redirect on write(ROW). This paper presents a novel snapshot scheme which could use of storage resources effectively and keep the historical data accurately for SSDHDD-hybrid storage system. SSD(source volume) stores all the active data and executes read/write operations without responding to snapshot operations. In contrast,HDDs(snapshot volume) store the writing data sequentially in the form of logs and are responsible for backup and snapshot operations. In this way, the hybrid storage system can get the high throughput power via SSD even the snapshot functions are active and HDDs can keep pace with the high Input/Output operations per second(IOPS)capability of the SSD. Logs are combined and kept in a separate image volume by the controller. So, fine-grained Recovery point objective(RPO) and good Recovery time objective(RTO) can be achieved. Experiment results show that the prototype can achieve excellent I/O performance while snapshot operations are active and consume a few extra storage space. | YU Xiao TAN Yu'an ZHANG Changyou LIANG Chen Khaled AOURRA ZHENG Jun ZHANG Quanxin | 2018 | Chinese Journal of Electronics2018，27，1： | 5 |
| 9 | A Self-certified Cross-Cluster Asymmetric Group Key Agreement for Wireless Sensor Networks显示文摘Wireless sensor networks have some obvious characteristics, such as communication range is limited, computing power is limited and energy is limited. Group key agreement in this environment requires a cross-cluster, computation and communication overhead are lightweight and highly safe group key agreement protocol. Aiming at these demands, the paper proposes a Self-certified cross-cluster Asymmetric group key agreement(SC-AGKA). To establish a lightweight and efficient group communication channel among sensor nodes. According to the cluster head as the bridge node to realize the sensor nodes in different cluster have the same group key information, and negotiate a pair of asymmetric group keys to realize the cross cluster secure communication. The group communication adopts asymmetric encryption mechanism. It realizes the group security communication mechanism of message sender unconstraint. The asymmetric group key agreement has the key self-certified, which does not need additional rounds to verify the correctness of group key. Proven and analysis show that the proposed protocol has the advantages of in security and energy consumption. | ZHANG Qikun LI Yongjiao ZHANG Quanxin YUAN Junling WANG Ruifang GAN Yong TAN Yu'an | 2019 | Chinese Journal of Electronics2019，28，2： | 5 |
| 10 | Patients with SARS-CoV-2 and HBV coinfection are at risk of greater liver injury显示文摘To date,it remains unclear if severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)co-infection exacerbates liver injury in patients with chronic hepatitis B virus(HBV)infection.In this study,we present a retrospective study of 133 hospitalized confirmed mild coronavirus disease 2019(COVID-19)cases,including 116 patients with COVID-19 with negative serum hepatitis B antigen and 17 HBV inactive carriers with COVID-19.We found that there were no significant differences for the discharge rate or duration of hospitalization be-tween the two groups.However,inactive HBV carriers with SARS-CoV-2 co-infection are at a higher risk of abnormal liver function tests.The enhanced liver injury induced by SARS-CoV-2 and HBV co-infection was identified as the hepatocyte type rather than the cholangiocyte type.Moreover,the inflammatory response,including abnormal lactate dehydrogenase,D-dimer and interleukin-6 production,may contribute to this injury following SARS-CoV-2 co-infection.Collectively,SARS-CoV-2 and HBV co-infection exacerbates liver function of the pa-tients with COVID-19. | Yong Lin Jun Yuan Quanxin Long Jieli Hu Haijun Deng Zhenyu Zhao Juan Chen Mengji Lu Ailong Huang | 2021 | Genes & Diseases2021，8，4： | 5 |
| 11 | Enhancement of Bio-based para-Xylene Selectivity in Catalytic Fast Pyrolysis of Cellulose Using a Surface-modified Mg/P/HZSM-5 Catalyst显示文摘With the growing consumption of oil, the production of /?-xylene(PX) from renewable biomass has gained significant attention recently. This work demonstrated that cellulose, a main component in lignocellulosic biomass, was directly converted into PX over the Mg/P surface-modified zeolites. The catalysts modified by the incorporation of P2O5 and MgO into HZSM-5(HZ) promoted the isomerization of zw-/o-xylenes to p-xylene. The PX selectivity was greatly enhanced using the modified zeolites due to the deactivation of external surface and the adjustment of pore entrance. In addition, the addition of methanol to cellulose was beneficial to increase the selectivity of xylenes due to the alkylation reactions and the Diels-Alder reactions between cellulose-derived furans and methanol-derived olefins. The highest PX yield of 10.7%(molar fraction) with a high PX selectivity in xylenes(97.1%) was obtained over the 10%Mg/5%P/HZ catalyst. The reaction pathway for the formation ofp-xylene was addressed according to the study of the key reactions and the characterization of catalysts. | WANG Yulan FAN Minghui ZHU Lijuan WANG Shengfei HE Yuting LI Quanxin | 2019 | Chemical Research in Chinese Universities2019，35，3： | 4 |
| 12 | Circular cladding waveguides in Pr:YAG fabricated by femtosecond laser inscription:Raman,luminescence properties and guiding performance显示文摘We report on the fabrication of circular cladding waveguides with cross-section diameters of 60−120μm in Pr:YAG crystal by applying femtosecond laser inscription.The fabricated waveguides present 2D guidance on the cross-section and fairly low propagation losses.Multiple high-order guiding modes are observed in waveguides with different diameters.Corresponding simulation results reveal the origin of a specific kind of guiding modes.Confocal micro-Raman(μ-Raman)experiments demonstrate the modification effects in femtosecond laser affected areas and ascertain the refractive index induced guiding mechanism.In addition,luminescence emission properties of Pr3+ions at waveguide volume are well preserved during the femtosecond laser inscription process,which may result in a potential high-power visible waveguide laser. | Quanxin Yang Hongliang Liu Shan He Qingyu Tian Bin Xu Pengfei Wu | 2021 | Opto-Electronic Advances2021，4，2： | 4 |
| 13 | Multi-domain Lightweight Asymmetric Group Key Agreement显示文摘The terminals in mobile cloud computing have themselves the special characteristics, such as mobile flexibility, distributed in different domains, resourceconstraint and easily to be captured et al. The terminals in mobile cloud computing participated the collaborative computing, information exchange and sharing secrets may come from different domains, different networks or different clouds. For this complex network environment the paper proposes a Multi-domain lightweight Asymmetric group key agreement(ML-AGKA). It adopts the bilinear mapping and blind key technology to achieve an asymmetric group key agreement protocol among mobile terminals distributed in different domains, proposes a computation and communication migration technologies to ensure that the mobile terminals are lightweight computing and communication consumption. The protocol can also achieve anonymity and authentication. The protocol is proven secure under the Computational Diffe-Hellman(CDH) problem assumption and the performance analysis shows that the proposed protocol is highly efficient. | ZHENG Jiamin TAN Yu'an ZHANG Xiaosong ZHANG Qikun ZHANG Quanxin ZHANG Changyou | 2018 | Chinese Journal of Electronics2018，27，5： | 4 |
| 14 | An Authenticated Asymmetric Group Key Agreement for Imbalanced Mobile Networks显示文摘A Group key agreement(GKA) protocol enables a group of communicating parties to negotiate a common secret key over an open, untrusted network. The design goal of GKA is to achieve secure group communication, which is an important research issue for mobile communication. The conventional(symmetric) GKA protocol allows a group of members to establish a common secret key for imbalanced mobile networks. However, only the group members can broadcast secret message to the group. To overcome this limitation, this paper proposes an authenticated asymmetric GKA protocol. Instead of a common secret key, each group member negotiates a common group public key and holds a different decryption key. The paper proposed protocol supports the dynamic nodes update of mobile networks, which has forward secrecy and backward secrecy of group key. This protocol is proven secure under the Bilinear Computational Diffie–Hellman problem assumption and the performance analysis shows that the proposed scheme is highly efficient. | ZHANG Qikun ZHANG Quanxin MA Zhongmei TAN Yu'an | 2014 | Chinese Journal of Electronics2014，23，4： | 4 |
| 15 | A Hybrid Compression Framework for Large Scale Trajectory Data in Road Networks显示文摘A Hybrid compression framework of trajectory data(HCFT) is proposed for effective compression of tra jectory data with road network limited. It's different from the present researches which mainly focus on compression of single tra jectory, and further takes data redundancy raised by the similarity of movement pattern of moving objects into consideration. HCFT divides the redundancy of tra jectory data into Single tra jectory redundancy(STR) and Multiple tra jectories redundancy(MTR) and compresses them in a hybrid way(i.e. synchronous compression for STR at first and then asynchronous compression for MTR). We propose an asynchronous extraction algorithm for MTR based on frequent Road track subsequence(RTS), which replaces similar movement route by RTS, with the complexity of calculation significantly reduced. HCFT can not only gain higher compression ratio,but also ensure effectiveness of compressed tra jectory. We also verify effectiveness and superiority of the new method according to the experiments of real tra jectory dataset. | WU Peili TAN Yu'an ZHENG Jun ZHANG Quanxin LI Yuanzhang CHENG Zijing | 2015 | Chinese Journal of Electronics2015，24，4： | 4 |
| 16 | Occurrence of psychrotolerant Bacillus cereus group strains in ice creams显示文摘 | Guoping Zhou Dasheng Zheng Lina Dou Quanxin Cai Zhiming Yuan | 2009 | International Journal of Food Microbiology2009，，2： | 2 |
| 17 | Memristive network-based genetic algorithm and its application to image edge detection显示文摘This paper proposes a mem-computing model of memristive network-based genetic algorithm(MNGA)by building up the relationship between the memristive network(MN)and the genetic algorithm(GA),and a new edge detection algorithm where image pixels are defined as individuals of population.First,the computing model of MNGA is designed to perform mem-computing,which brings new possibility of the hardware implementation of GA.Secondly,MNGA-based edge detection integrating image filter and GA operator deployed by MN is proposed.Finally,simulation results demonstrate that the figure of merit(FoM)of our model is better than the latest memristor-based swarm intelligence.In summary,a new way is found to build proper matching of memristor to GA and aid image edge detection. | YU Yongbin YANG Chenyu DENG Quanxin NYIMA Tashi LIANG Shouyi ZHOU Chen | 2021 | Journal of Systems Engineering and Electronics2021，32，5： | 2 |
| 18 | Service-Oriented Wireless Multimedia Multicasting with Partial Frequency Reuse显示文摘Service-Oriented Architecture(SOA) is employed in a wide range of applications because it promises to expose computation-intensive tasks as services and combine them with new applications to accelerate their applications development process. For service-oriented multimedia applications, the performance of multicasting transmission services under multimedia traffic must be evaluated. Multiview Video(MVV) is a promising and emerging type of multimedia traffic that consists of multiple video streams, allows stream switching, and requires strict Quality-of-Service(Qo S). In this study, we investigated multicast transmission of MVV in wireless cellular networks with Partial Frequency Reuse(PFR) and focused on two challenging problems:(1) multicast group formation and(2) subchannel and power allocation. Initially, we propose a novel Content-based Partial frequency reuse Diversity Grouping(CPDG) scheme to allocate users to multicast groups on the basis of Partial frequency reuse Diversity(PD) in wireless networks with PFR. After group formation, an optimization problem for subchannel and power allocation is formulated to minimize network power consumption under Qo S constraint. Thereafter,the optimization problem is divided into two subproblems and solved using simplex method and Karush-KuhnTucker(KKT) condition. Finally, to solve the optimization problem, a suboptimal scheme referred to as Partial frequency reuse Diversity Based Energy-efficient Multicasting(PDEM) is proposed by dynamically allocating wireless resources under Qo S constraint. The simulation results show that the proposed PDEM scheme can achieve close-to-optimal performance. Moreover, mathematical analysis of the effect of PD on network performance can provide guidelines for optimization of multimedia traffic in multicasting-enabled wireless cellular networks with PFR. | Quanxin Zhao Liang Xu Yuming Mao Supeng Leng Geyong Min Jia Hu Noushin Najjari | 2016 | Tsinghua Science and Technology2016，21，6： | 2 |
| 19 | A Specific-Targeting Asymmetric Group Key Agreement for Cloud Computing显示文摘When the information is exchanged and transmitted among the group members in mobile cloud environment, the group members may distribute different security domains. The information exchanged among group members may have different secret levels in this environment. When a person has some secret information, he only wants to share these information with some people who have the appropriate level of security permissions, other than all the members in the group. Aiming at these needs,we propose a flexible Asymmetric group key agreement(AGKA) protocol that information exchange and transmission are specific-targeting. The paper adopts bilinear mapping and two-way anonymous authentication technology to hide personal identity authentication information, and uses storage and computing migration technology to reduce the resource consumption of mobile terminal, and also proposes the secret key factor oriented extraction and combinations technology to achieve multi-level three-dimensional complex space security information exchange requirements and meet the lightweight computing. The analysis proves that the protocol has good safety performance and low resource consumption. | TAN Yu'an ZHENG Jiamin ZHANG Qikun ZHANG Xiaosong LI Yuanzhang ZHANG Quanxin | 2018 | Chinese Journal of Electronics2018，27，4： | 2 |
| 20 | Transcriptome and physiological analyses provide insights into the leaf epicuticular wax accumulation mechanism in yellowhorn显示文摘Plantations and production of yellowhorn,one of the most important woody oil and urban greening trees widely cultivated in northern China,have gradually become limited by drought stress.The epicuticular wax layer plays a key role in the protection of yellowhorn trees from drought and other stresses.However,there is no research on the mechanism of wax loading in yellowhorn trees.In this study,we investigated the anatomical and physiological characteristics of leaves from different germplasm resources and different parts of the same tree and compared their cuticle properties.In addition,the different expression patterns of genes involved in wax accumulation were analyzed,and a coexpression network was built based on transcriptome sequencing data.Morphological and physiological comparisons found that the sun leaves from the outer part of the crown had thicker epicuticular wax,which altered the permeability and improved the drought resistance of leaves,than did shade leaves.Based on transcriptome data,a total of 3008 and 1324 differentially expressed genes(DEGs)were identified between the sun leaves and shade leaves in glossy-and non-glossy-type germplasm resources,respectively.We identified 138 DEGs involved in wax biosynthesis and transport,including structural genes(such as LACS8,ECH1,and ns-LTP)and transcription factors(such as MYB,WRKY,and bHLH transcription factor family proteins).The coexpression network showed a strong correlation between these DEGs.The differences in gene expression patterns between G-and NG-type germplasm resources under different light conditions were very clear.These results not only provide a theoretical basis for screening and developing drought-resistant yellowhorn germplasm resources but also provide a data platform to reveal the wax accumulation process of yellowhorn leaves. | Yang Zhao Xiaojuan Liu Mengke Wang Quanxin Bi Yifan Cui Libing Wang | 2021 | Horticulture Research2021，8，1： | 2 |
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