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| 1 | Research on the application of 4-weighted fractional Fourier transform in communication system显示文摘The paper reveals the relationship between the weighting coefficients and weighted functions via the research of coefficients matrix and based on the original definition of 4-weighted fractional Fourier transform(4-WFRFT).The multi-parameters expression of weighting coefficients are given.Moreover, the 4-WFRFT of discrete sequences is defined by introducing DFT into it, which makes it suitable for digital communication systems.After analyzing the properties of WFRFT, a typical scheme for modulation/demodulation is proposed, which could make the statistics properties of the real and image part on both of the time and frequency domain and the phase properties have a significant variation.Such a variation could be controlled by the adjustment of transform parameters.If the WFRFT of multi-parameters is implemented, it will be more difficult to intercept and capture the modulated signals than normal. | MEI Lin SHA XueJun RAN QinWen ZHANG NaiTong | 2010 | Science China(Information Sciences)2010，53，6： | 25 |
| 2 | Surface current field and seasonal variability in the Kuroshio and adjacent regions derived from satellite-tracked drifter data显示文摘The multiyear averaged surface current field and seasonal variability in the Kuroshio and adjacent regions are studied.The data used are trajectories and(1/4)° latitude by(1/4)° longitude mean currents derived from 323 Argos drifters deployed by Chinese institutions and world ocean circulation experiment from 1979 to 2003.The results show that the Kuroshio surface path adapts well to the western boundary topography and exhibits six great turnings.The branching occurs frequently near anticyclonic turnings rather than near cyclonic ones.In the Luzon Strait,the surface water intrusion into the South China Sea occurs only in fall and winter.The Kuroshio surface path east of Taiwan,China appears nearly as straight lines in summer,fall,and winter,when anticyclonic eddies coexist on its right side;while the path may cyclonically turning in spring when no eddy exists.The Kuroshio intrusion northeast of Taiwan often occurs in fall and winter,but not in summer.The running direction,width and velocity of the middle segment of the Kuroshio surface currents in the East China Sea vary seasonally.The northward intrusion of the Kuroshio surface water southwest of Kyushu occurs in spring and fall,but not in summer.The northmost position of the Kuroshio surface path southwest of Kyushu occurs in fall,but never goes beyond 31°N.The northward surface current east of the Ryukyu Islands exists only along Okinawa-Amami Islands from spring to fall.In particular,it appears as an arm of an anticyclonic eddy in fall. | HU Xiaomin XIONG Xuejun QIAO Fangli GUO Binghuo LIN Xiaopei | 2008 | Acta Oceanologica Sinica2008，27，3： | 23 |
| 3 | Guaranteeing Wireless Communication Secrecy via a WFRFT-Based Cooperative System显示文摘In this paper, a weighted fractional Fourier transform(WFRFT) based cooperative overlay system, aiming to guarantee physical layer(PHY) security, is proposed. The paper elaborates how WFRFT and physical layer properties of the wireless medium are collaborated to guarantee the secrecy of wireless transmissions. In the proposed system, WFRFT is first preform on the secret data, such that the transmitted signal is distorted and can only be neutralized by inverse-WFRFT with the same parameter. And then two streams of the transformed sequences that bearing different messages are cooperatively and simultaneously transmitted to two legitimate receivers via a beamforming-liked method, respectively. In general, both the rapid spatial decorrelation property and the inherent security features of WFRFT are leveraged, such that only the eavesdropper's is degraded, and hence, the wireless communication secrecy is reliably guaranteed. Numerical simulations are conducted to evaluate the performance of the proposed system in terms of the average bit error rate and the secrecy capacity. | Fang Xiaojie Sha Xuejun Mei Lin | 2015 | China Communications2015，12，9： | 18 |
| 4 | First light of the 1.8-m solar telescope–CLST显示文摘Large-aperture solar telescopes play an important role in solar observations and research,and require high temporal and spatial resolution[1].To solve some fundamental problems such as the solar dynamo,coronal heating,and the triggering of major solar eruptions,the spatial resolution for solar-atmosphere observation should reach at least 0.1 arcsec[2]. | ChangHui Rao NaiTing Gu XueJun Rao Cheng Li LanQiang Zhang JinLong Huang Lin Kong Ming Zhang YunTao Cheng Yi Pu Hua Bao YouMing Guo YangYi Liu JinSheng Yang LiBo Zhong ChangJun Wang Kai Fang XiaoJun Zhang DongHong Chen Cheng Wang XinLong Fan ZhiWu Yan KeLe Chen XiYa Wei Lei Zhu Hong Liu YongJian Wan Hao Xian WenLi Ma | 2020 | Science China(Physics,Mechanics & Astronomy)2020，63，10： | 6 |
| 5 | BER analysis of STBC hybrid carrier system based on WFRFT with frequency domain equalization显示文摘The inherent characteristic of hybrid carrier(HC) scheme based on the weighted-type fractional Fourier transform(WFRFT) is revealed. The proposed linear combination of single carrier(SC) and multicarrier's(MC) characteristics is helpful to balance the conflicting requirements and achieve the comparative analysis of SC/MC. As an example, analytical SER/BER expressions of HC system with zero forcing(ZF)and minimum mean square error(MMSE) equalization are derived. In addition, the derived BER expressions are extended to multi-input systems. A unified framework of space time block code(STBC) HC scheme is proposed with two WFRFT modules at the transmitter or receiver, where STBC-SC and STBC-MC systems are the special cases of the novel structure. | Zhenduo WANG Lin MEI Xuejun SHA Naitong ZHANG | 2018 | Science China(Information Sciences)2018，61，8： | 5 |
| 6 | GWAS promotes precision medicine in China显示文摘Most common diseases and genetic traits are associated with multiple genetic and environmental factors as well as consequences of their interactions(Chakravarti and Little,2003;Guttmacher et al.,2004).In recent years,genetic analyses of human diseases with quantitative traits were primarily focused on identifying common variants through genome-wide association studies(GWASs),and many novel susceptibility genes implicating | Liangdan Sun Xuejun Zhang Lin He | 2016 | Journal of Genetics and Genomics2016，43，8： | 5 |
| 7 | Industrial upgrading based on global innovation chains:A case study of Huawei technologies Co.,Ltd.Shenzhen显示文摘Although China is a global trade power,it has low value-added trade,which lies at the bottom of the global value chain.Therefore,there is an urgent need to change the unfavorable position of the international division of labor in China.The global innovation chain is a new development of innovation through which China can implement open innovation and utilize the world's advanced knowledge,technology,information,and other resources to enhance its innovation capabilities,promote industrial upgrading,and improve the status of its global value chains.This paper takes Huawei as an example of international cooperation and innovation,aspects that have allowed the company to rapidly improve its position and prestige in the industry.The case study of Huawei suggests that China should introduce talent,increase investment abroad,attract foreign investment,expand intellectual property trade,develop outsourcing and international strategic research and development alliances,build a global innovation chain,and promote industrial upgrading to elevate the status of its international division of labor. | Xuejun Lin Bingqian Liu Jiaxu Han Xiangyue Chen | 2018 | International Journal of Innovation Studies2018，2，3： | 5 |
| 8 | Digital computation of the weighted-type fractional Fourier transform显示文摘The paper reveals the time-frequency symmetric property of the weighted-type fractional Fourier transform (WFRFT) by investigating the original definition of the WFRFT, and proposes a discrete algorithm of the WFRFT based on the weighted discrete Fourier transform (WDFT) algorithm with constraint conditions of the definition of the WFRFT and time-domain sampling. When the WDFT is considered in digital computation of the WFRFT, the Fourier transform in the definition of the WFRFT should be defined in frequency (Hz) but not angular frequency (rad/s). The sampling period Δt and sampling duration T should satisfy Δt = T/N = 1/N(1/2) when N-point DFT is utilized. Since Hermite-Gaussian functions are the best known eigenfunctions of the fractional Fourier transform (FRFT), digital computation based on eigendecomposition is also carried out as the additional verification and validation for the WFRFT calculation. | MEI Lin ZHANG QinYu SHA XueJun ZHANG NaiTong | 2013 | Science China(Information Sciences)2013，56，7： | 4 |
| 9 | Hybrid C a rrie r S prea d Based on 4-Weighted T ra nsform Spectrum System Fractional Fourier显示文摘Spread Spectrum (SS) is a promising technique to resist interference in wireless communication system. In order to further improve this capability, this paper proposes a Hybrid Carrier (HC) SS system, combining 4-Weighted Fractional Fourier Transform (4-WFRFT) with SS technique. In this HC-SS system, due to the property of 4-WFRFT, the signal energy of proposed system is distributed on the time-frequency plane more evenly and symmetrically, compared with the existing Single-Carrier (SC) and Multi-Carrier (MC) spread spectrum systems. In the selective channel, the proposed method can split the interference to a more broad range in order to reduce the influence, resulting in the better system performance. In addition, proposed system can be seen as the convergence of the existing SS techniques, which is a main feature in future. | Qiu Xin Sha Xuejun Mei Lin | 2012 | China Communications2012，9，1： | 4 |
| 10 | Performance analysis of a single-stage scroll compressor used in a drying heat pump over a wide condensing temperature range(30–80°C)显示文摘This study presents the performance of a new single-stage scroll compressor used for the heat pump drying of thermally sensitive materials over a wide temperature range.The performance of the new compressor was predicted by an ARI standard 540map-based compressor model and verified by a semi-open drying heat pump system constructed for this purpose.A comparison of the experimental data with the predicted data proved that the new scroll compressor used in the drying heat pump works well,can supply a wide range of condensing temperatures(30–80°C)(without auxiliary heating),and has a minimum coefficient of performance(COP)above 2.0,even in the worst condition. | WEI Juan YANG LuWei ZHANG ZhenTao LIN XueJun ZHANG Chong LI Bo | 2014 | Science China(Technological Sciences)2014，57，11： | 3 |
| 11 | Identification of p100 target promoters by chromatin immunoprecipitation-guided ligation and selection (ChIP-GLAS)显示文摘The multifunctional protein p100 is a vital transcriptional regulator that increases gene transcription by forming a physical bridge between promoter-specific transcription factors and the basal transcription machinery.To identify potential signal transduction pathways in which human p100 acts as a coregulator and to find target promoter regions that may interact with p100,we performed a promoter microarray assay called chromatin immunoprecipitation-guided ligation and selection(ChIP-GLAS).From this assay,we determined that a set of promoter fragments,including several factors in the transforming growth factor beta(TGF-β)signaling pathway,exhibited interaction with p100.The ChIP-GLAS data were validated by RT-PCR assessing the mRNA expression of various factors in the TGF-b signaling pathway in cell lines. | Xin Liu Lijie Dong Xuejun Zhang Baoya Wang Xinting Wang Hu Li Jinyan He Lin Ge Xiang Jing Zhi Yao Jie Yang | 2011 | Cellular & Molecular Immunology2011，8，1： | 3 |
| 12 | Relationship Between Perisylvian Essential Language Sites and Arcuate Fasciculus in the Left Hemisphere of Healthy Adults显示文摘Essential language sites and the arcuate fasciculus(AF) have been extensively researched. However, the relationship between them remains insufficiently studied,especially in healthy people. Navigated transcranial magnetic stimulation(n TMS) is increasingly used in language mapping. While enjoying the advantage of non-invasiveness, it is also capable of inducing a virtual lesion in the brain. Thus, it offers the possibility of using the virtuallesion method to study the healthy brain. This study combined n TMS and diffusion tensor imaging(DTI)tractography to investigate the relationship between essential language sites and the AF in 30 healthy right-handedvolunteers. A total of 143 essential language sites were identified using n TMS, and a total of 175 AF terminations were identified using DTI tractography. Sixty-six sites had a direct correlation with the AF, accounting for 46% of the total essential language sites. Forty-seven AF terminations harbored essential language sites, accounting for 27% of the total AF terminations. Upon data rendering to the cortical parcellation system, a region-related heterogeneity of the correlation rate was found. This study provides the first data on the relationship between essential language sites and the AF in healthy adults. | Yu Lin Kai Zhang Shuai Li Song Li Jingna Jin Fang Jin Wen Qin Long Hai Meng Zhu Chunshui Yu Zhipeng Liu Tao Yin Xuejun Yang | 2017 | Neuroscience Bulletin2017，33，6： | 3 |
| 13 | Incidence of Macrosomia in Rural Areas—Henan Province,China,2013–2017显示文摘Introduction:Macrosomia has short-term and long-term adverse health effects and is thus an important public health concern.Recent decades have witnessed increasing incidence of macrosomia in many countries.Methods:The present study used a large population-based birth cohort study to depict incidence of macrosomia among live births in rural areas of Henan Province of China from 2013 to 2017.Results:Among the 1,262,916 births,82,353 were cases of macrosomia.The overall incidence of all types of macrosomia,of macrosomia with birth weight<4,500 g,and of macrosomia with birth weight≥4,500 g were 6.52%,5.30%,and 1.22%,respectively.From 2013 to 2017,the incidence of macrosomia decreased by 31.3%from 7.96%in 2013 to 5.47%in 2017(X^(2)_(trend)=946.96,P_(trend)<0.001).Male infants and infants≥42 gestational weeks had significantly higher incidence of macrosomia than that of female infants and infants<42 gestational weeks(P<0.001).Conclusion:Gestational weight control through nutrition management and physical activities during pregnancy are needed to reduce incidence of macrosomia. | Shiqi Lin Jian Chai Jiajia Li Xuejun Shang Lijun Pei Lifang Jiang Junxi Zhang Panpan Sun Wei Dong Yuhong Wang Dezhuan Zhou | 2021 | China CDC weekly2021，3，37： | 3 |
| 14 | EAST-Educational Adaptive-optics Solar Telescope显示文摘For the public having a better understanding of solar activities,the Educational Adaptive-optics Solar Telescope(EAST)was built in July 2021 and is located at the Shanghai Astronomy Museum.The EAST consists of a 65 cm aperture solar telescope with a 177-element adaptive optics system and two-channel high resolution imaging system at the Hαand TiO bands,in addition to three full disk solar telescopes at CaK,Hαand TiO bands equipped on the tube of the main telescope.In this paper,the configuration of the EAST is described.Its performance and on-sky observational results are presented.The EAST,to our knowledge,is the most advanced solar telescope for the popularization of science in the world.Due to its excellent performance,the data acquired by the EAST can also be used for research on solar physics and space weather prediction. | Changhui Rao Xuejun Rao Zhimao Du Hua Bao Cheng Li Jinlong Huang Youming Guo Libo Zhong Qing Lin Xin Ge Jinsheng Yang Xinlong Fan Yangyi Liu Dan Jia Xin Li Mei Li Ming Zhang Yuntao Cheng Jiahui Zhou Jiawen Yao Lanqiang Zhang Naiting Gu | 2022 | Research in Astronomy and Astrophysics2022，22，6： | 3 |
| 15 | Comprehensive analysis of circular RNA expression profiles in cisplatin-resistant non-small cell lung cancer cell lines显示文摘Platinum-based drugs such as cisplatin are widely used in combination chemotherapy for nonsmall cell lung cancer(NSCLC)owing to their high clinical response rate;however,acquired resistance to cisplatin is eventually inevitable.Circular RNAs(circRNAs)are involved in the development of diverse types of cancers,but their cormection to cisplatin-resistance in NSCLC has not been studied.In the present study,two cisplatin-resistant NSCLC cell lines(A549/DDP and PC9/DDP)were established by gradually increasing concentrations of cisplatin in the media.The resulting cell lines possessed high resista nee to cisplati n and strong prol讦erati on,migration,and colony formation abilities compared to the parental cells.Microarray analysis identified 19,161 circRNAs that were dysregulated in cisplatin-resistant cell lines(fold change abs>2),including 11,915 up-regulated and 7246 down-regulated circRNAs.The expression of the top five up-regulated and down-regulated circRNAs was validated using real-time quantitative polymerase chain reaction.A circRNA-micro RNA(miRNA)network of the top 20 dysregulated circRNAs and their predicted miRNAs was constructed using Cytoscape.Gene ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses revealed that the host genes of the identified circRNAs were involved in the regulation of MAP kinase kinase kinase kinase activity,6-phosphofructo-2-kinase activity,focal adhesi on,ErbB signali ng,and ECM-receptor in teractions,which may con tribute to cisplatin resistance in NSCLC.In summary,this is the first report on circRNA profiling in cisplatin-resistant NSCLC cells and it provides new potential targets for the reversal of cisplatin resistance in NSCLC. | Lin Song Zhilei Cut Xuejun Guo | 2020 | Acta Biochimica et Biophysica Sinica2020，52，9： | 3 |
| 16 | 8-Weighted-Type Fractional Fourier Transform Based Three-Branch Transmission Method显示文摘To improve the bit error rate(BER) performance of multiple input multiple output(MIMO) systems with low complexity, a three-branch transmission scheme employing 8-weighted-type fractional Fourier transform(8-WFRFT) module is proposed. In the proposed scheme, the original signal is first decomposed into eight sub-signals and then merged into three component signals by the same carrier pattern. The three signals have mathematical constraint relations among themselves that can counteract the channel fading. They are simultaneously transmitted via three independent antennas after delay regulating. At the receiver, an inverse 8-WFRFT module is employed to obtain the estimated original signal by processing the received signal. Then, the bit error rate(BER) performance, transmitting power, transmission rate, power spectrum and computational complexity of the proposed scheme are analysed in detail. Numerical results show that the proposed scheme has a superior performance compared to STBC based three-antenna transmission scheme, in terms of BER performance. | Jing Li Xuejun Sha Xiaojie Fang Lin Mei | 2018 | China Communications2018，15，9： | 2 |
| 17 | First light of solar multi-conjugate adaptive optics at the 1-m new vacuum solar telescope显示文摘Observations play a leading role in any branches of astronomy,including solar physics.In order to solve fundamental problems,such as solar dynamo[1],coronal heating[2]and the triggering of major solar eruptions[3],solar observations with spatial resolution better than 0.1 arcsec are required.Such a goal cannot be achieved without the help of adaptive optics(AO),which eliminates the wavefront distortion caused by atmosphere turbulence[4,5].However,solar observations are performed over an extended field of | ChangHui Rao LanQiang Zhang Lin Kong YouMing Guo XueJun Rao Hua Bao Lei Zhu LiBo Zhong | 2018 | Science China(Physics,Mechanics & Astronomy)2018，61，8： | 2 |
| 18 | Research on the Damage of Porosityand Permeabilitydue to Perforation on Sandstone in the Compaction Zone显示文摘A perforating hole is a channel through which the oil and gas in a reservoir pass into the production well bore.During the process of perforating due to explosion,the surrounding sandstone will be damaged to a certain extent,which will increase the well bore skin and lead to the decrease of production consequently.In this work a mechanical model of perforating damage is developed to describe the influences of perforating due to explosion on the porosity and permeability of the surrounding sandstone near the compaction zone.Based on this developed model,the important data related to the damage of sandstone,such as matrix effective stress,plastic deformation,volumetric strain,and so on,can be numerically simulated.Especially the behaviors of plasticity kinematic hardening at high strain rate due to impact loads,which are the important characteristics in the sandstone,is taken into account in this developed model.Both numerical and testing results show that the damage due to perforation in the sandstone can be accurately predicted by the developed model together with the porosity and permeability evolving model of perforation in a compaction zone.As a practical application,a methodology for the analysis of damage of porosity and permeability around a perforation tunnel is supposed based on the developed model and the core flow efficiency test of interparticle pore spaced sandstone target in China Shengli Oilfield and the computed tomography test. | Shifeng Xue Xiuxing Zhu Lin Zhang Shenghu Zhu Guigen Ye Xuejun Fan | 2016 | Computers, Materials & Continua2016，，1： | 2 |
| 19 | UAV-Aided Networks for Emergency Communications in Areas with Unevenly Distributed Users显示文摘Nowadays,daily human life is closely intertwined with various networks.When natural disasters or malicious attacks break out,the failure of communication infrastructure due to direct destruction or indirect impact tends to cause a massive outage of communications.Emergency communication networks play a significant role in rescue operations.Recently,a flexible and efficient solution has been provided for emergency communications using unmanned aerial vehicles(UAVs).By means of their excellent characteristics,UAVs,serving as aerial base stations(ABSs),can be rapidly deployed to temporarily rebuild a damaged communication network to restore the users’connectivity.In this study,we investigate the use of UAVs as ABSs for an emergency communication scene where user equipment is unevenly distributed and the communication infrastructure has completely failed due to a severe disaster.Effective communication probability(ECP),which integrates throughput coverage and connectivity,is used to evaluate the performance of a communication network.Through simulations,we analyze communication improvements that can be obtained by the flexible deployment of ABSs.The results show a noticeable increase in ECP when some ABSs are deployed in optimal locations. | Gaozhao Peng Yongxiang Xia Xuejun Zhang Lin Bai | 2018 | Journal of Communications and Information Networks2018，3，4： | 1 |
| 20 | The approach to carrier scheme convergence based on 4-weighted fractional Fourier transform 显示文摘 | MEI Lin SHA Xuejun ZHANG Naitong | | IEEE Communication Letters0，4，6： | 1 |
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