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| 1 | System Integration of Terrestrial Mobile Communication and Satellite Communication——The Trends, Challenges and Key Technologies in B5G and 6G显示文摘Mobile communication standards have been developed into a new era of B5G and 6G.In recent years,low earth orbit(LEO)satellites and space Internet have become hot topics.The integrated satellite and terrestrial systems have been widely discussed by industries and academics,and even are expected to be applied in those huge constellations in construction.This paper points out the trends of two stages towards system integration of the terrestrial mobile communication and the satellite communications:to be compatible with 5G,and to be integrated within 6G.Based on analysis of the challenges of both stages,key technologies are thereafter analyzed in detail,covering both air interface currently discussed in 3GPP for B5G and also novel network architecture and related transmission technologies toward future 6G. | Shanzhi Chen Shaohui Sun Shaoli Kang | 2020 | China Communications2020，17，12： | 57 |
| 2 | A Comprehensive Survey of TDD-Based Mobile Communications Systems from TD-SCDMA 3G to TDLTE-Advanced 4G and 5G directions显示文摘TDD(Time Division Duplex) is one of the two duplex modes.TD-SCDMA(Time division Synchronous CDMA) is the first TDD-based cellular mobile system which is commercialized in wide area and large scale and TD-SCDMA is also the first cellular mobile system which adopted smart antenna technology,also called as beamforming.As the long term evolution of TD-SCDMA,TDLTE(A)(Time Division-Lone Term Evolution,and TD-LTE Advanced) introduced OFDM(Orthogonal Frequency Division Multiplexing)and enhanced smart antenna technology together with MIMO(Multiple Input Multiple Output),which are adopted by LTE FDD(Frequency Division Duplex) either.It is indicated that TD-SCDMA and TD-LTE(A)have opened a sustainable utilization era of TDD and smart antenna Technologies in the wireless mobile communication.This paper aims to present a systematic introduction to TDD-based mobile communications from TD-SCDMA to TD-LTE and beyond and its comparisons to FDD,with particular focuses on TDD key technologies,principles of TDD cellular mobile systems,TDD evolution path,and future TDD 5G directions.We hope that this paper will provide a comprehensive overview of TDD technology upgrade and its standard evolution,and serve as a valuable reference for research on 5G mobile communication systems.It is believed that TDD will play more important role in 5G. | CHEN Shanzhi SUN Shaohui WANG Yingmin XIAO Guojun Rakesh Tamrakar | 2015 | China Communications2015，12，2： | 17 |
| 3 | Vision,application scenarios,and key technology trends for 6G mobile communications显示文摘With the global commercialization of the fifth-generation(5G)network,many countries,including China,USA,European countries,Japan,and Korea,have started exploring 6G mobile communication network,following the tradition of“planning the next while commercializing one generation”.Currently,studies on 6G networks are at the infancy stage.Research on the vision and requirements for 6G is still ongoing,and the industry is yet to clarify the key enabling technologies for 6G.However,6G will certainly build on the success of 5G.Therefore,developing high-quality 5G networks and seamlessly integrating 5G with verticals are the priorities before 2030,when 6G is projected to be commercialized.Also,global 5G standards will keep evolving to better support vertical applications.As a milestone,the Third-Generation Partnership Project(3GPP)published Release 16 in July 2020,which continuously enhanced the capabilities of mobile broadband service based on Release 15 and realized the support for low-delay and high-reliability applications,such as Internet of Vehicles and industrial Internet.Currently,3GPP is working on Releases 17 and 18,focusing on meeting the demands of medium-and high-data-rate machine communication with low-cost and high-precision positioning,which will be published in June 2022.Thus,6G networks will further expand the application fields and scope of the Internet of Things to accommodate those services and applications that are beyond the capabilities of 5G networks.Herein,we present our vision,application scenarios,and key technological trends for 6G networks.Furthermore,we propose several future research opportunities in 6G networks with regard to industrialization and standardization. | Zhiqin WANG Ying DU Kejun WEI Kaifeng HAN Xiaoyan XU Guiming WEI Wen TONG Peiying ZHU Jianglei MA Jun WANG Guangjian WANG Xueqiang YAN Jiying XIANG He HUANG Ruyue LI Xinhui WANG Yingmin WANG Shaohui SUN Shiqiang SUO Qiubin GAO Xin SU | 2022 | Science China(Information Sciences)2022，65，5： | 17 |
| 4 | Stand basal area modelling for Chinese fir plantations using an artificial neural network model显示文摘Artificial neural network models are a popular estimation tool for fitting nonlinear relationships because they require no assumptions about the form of the fitting function,non-Gaussian distributions,multicollinearity,outliers and noise in the data.The problems of backpropagation models using artificial neural networks include determination of the structure of the network and overlearning courses.According to data from 1981 to 2008 from 15 permanent sample plots on Dagangshan Mountain in Jiangxi Province,a back-propagation artificial neural network model(BPANN)and a support vector machine model(SVM)for basal area of Chinese fir(Cunninghamia lanceolata)plantations were constructed using four kinds of prediction factors,including stand age,site index,surviving stem numbers and quadratic mean diameters.Artificial intelligence methods,especially SVM,could be effective in describing stand basal area growth of Chinese fir under different growth conditions with higher simulation precision than traditional regression models.SVM and the Chapman–Richards nonlinear mixed-effects model had less systematic bias than the BPANN. | Shaohui Che Xiaohong Tan Congwei Xiang Jianjun Sun Xiaoyan Hu Xiongqing Zhang Aiguo Duan Jianguo Zhang | 2019 | Journal of Forestry Research2019，30，5： | 4 |
| 5 | Analysis of Non-Orthogonal Multiple Access for 5G显示文摘The major challenge faced by the fifth generation(5G) mobile network is higher spectral efficiency and massive connectivity,i.e.,the target spectrum efficiency is 3 times over 4G,and the target connection density is one million devices per square kilometer.These requirements are difficult to be satisfied with orthogonal multiple access(OMA) schemes.Non-orthogonal multiple access(NOMA) has thus been proposed as a promising candidate to address some of the challenges for 5G.In this paper,a comprehensive survey of different candidate NOMA schemes for 5G is presented,where the usage scenarios of5 G and the application requirements for NOMA are firstly discussed.A general framework of NOMA scheme is established and the features of typical NOMA schemes are analyzed and compared.We focus on the recent progress and challenge of NOMA in standardization of international telecommunication union(ITU),and 3rd generation partnership project(3GPP).In addition,prototype development and future research directions are also provided respectively. | Yingmin Wang Bin Ren Shaohui Sun Shaoli Kang Xinwei Yue | 2016 | China Communications2016，13，S2： | 4 |
| 6 | Comparative transcriptome study provides insights into acquisition of embryogenic ability in upland cotton during somatic embryogenesis显示文摘Background: The conversion from non-embryogenic callus(NEC) to embryogenic callus(EC) is the key bottleneck step in regeneration of upland cotton(Gossypium hirsutum), and hinders the transgenic breeding of upland cotton.To investigate molecular mechanisms underlying acquisition of embryogenic potential during this process, comparation analysis of transcriptome dynamics between two upland cotton cultivars with different somatic embryogenesis abilities was conducted.Results: Differentially expressed genes involved in the transformation from NEC to EC were detected in the two different cultivars. Principal component analysis based on DEGs showed that the NEC tissues of the two cultivars were highly heterogeneous, whereas the derived EC tissues were similar, which suggested the homogeneousness of EC between different lines. In the highly embryogenic cultivar CCRI 24, more of these genes were down-regulated, whereas,in the recalcitrant cultivar CCRI 12, more were up-regulated. Bioinformatics analysis on these DEGs showed that the vast majority of differentially expressed genes were enriched in metabolism and secondary metabolites biosynthesis pathways. Flavonoid biosynthesis and phenylpropanoid biosynthesis pathways were enriched in both cultivars,and the associated genes were down-regulated more in CCRI 24 than in CCRI 12. We deduced that vigorous secondary metabolism in CCRI 12 may hinder primary metabolism, resulting in tardiness of cell differentiation.Interestingly, genes involved in the plant hormone signal transduction pathway were enriched in the recalcitrant cultivar CCRI 12 but not in CCRI 24, suggesting more radical regulation of hormone signal transduction in the recalcitrant cultivar. Signal transduction rather than biosynthesis of plant hormones is more likely to be the determining factor triggering NEC to EC transition in recalcitrant cotton lines. Transcription factor encoding genes showed differential regulation between two cultivars.Conclusions: Our study provides valuable information about the molecular mechanism of conversion from NEC to EC in cotton and allows for identification of novel genes involved. By comparing transcriptome changes in transformation from NEC to EC between the two cultivars, we identified 46 transcripts that may contribute to initiating embryogenic shift. | SUN Ruibin TIAN Ruiping MA Dan WANG Shaohui LIU Chuanliang | 2018 | Journal of Cotton Research2018，1，2： | 3 |
| 7 | A CSI Acquisition Approach for mm Wave Massive MIMO显示文摘Massive Multiple-Input Multiple-Output(MIMO)is considered as a key technology for 4G and 5G wireless communication systems to improve spectrum efficiency by supporting large number of concurrent users.In addition,for the target frequency band of 5G system,mmWave band,massive MIMO is pivotal in compensating the high pathloss.In this paper,we investigate the channel state information(CSI)acquisition problem for mmWave massive MIMO.With hybrid analog-digital antenna architecture,how to derive the analog beamforming and digital beamforming is studied.An iterative analog beam acquisition approach is proposed to save system overhead and reduce beam searching complexity.Regarding the digital beamforming,a grouping based codebook is proposed to facilitate CSI feedback.The codebook is then extended to incorporate also analog beam acquisition.Furthermore,channel reciprocity is exploited to save CSI reporting overhead and a two-stage approach is proposed to fully utilize the channel reciprocity at both mobile station and base station side and accelerate the CSI acquisition procedure. | Shanzhi Chen Qiubin Gao Runhua Chen Hui Li Shaohui Sun Zhengxuan Liu | 2019 | China Communications2019，16，9： | 2 |
| 8 | Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation显示文摘In this study, photo-Fenton oxidation was applied to degradation of sulfamonomethoxine sodium (SMMS) in aqueous solution. The operation parameters of pH, temperature, and concentrations of H2O2, Fe2+ and SMMS were investigated. The optimum conditions for the photo-Fenton process were determined as follows: [SMMS]=4.53 mg/L, pH 4.0, [H2O2]=0.49 mmol/L, [Fe2+]= 19.51 μmol/L and T=25°C. Under these conditions 98.5% of the SMMS degraded. The kinetics were also studied, and degradation of SMMS by the photo-Fenton process could be described by first-order kinetics. The apparent activation energy was calculated as 23.95 kJ/mol. Mineralization of the process was investigated by measuring the chemical oxygen demand (COD), and the COD decreased by 99% after 120 min. This process could be used as a pretreatment method for wastewater containing sulfamonomethoxine sodium. | SUN JianHui FENG JingLan SHI ShaoHui PI YunQing SONG MengKe SHI Yan | 2012 | Chinese Science Bulletin2012，57，5： | 2 |
| 9 | Interference management through CoMP in 3GPP LTE-advanced networks显示文摘 | Sun Shaohui Gao Qiubin | 2013 | Communications IEEE Transactions on2013，20，1： | 1 |
| 10 | Fast decoding of LDPC codes using quantisation 显示文摘 | HE Yucheng SUN Shaohui WANG Xinmei | 2002 | Electronics Letters2002，38，4： | 1 |
| 11 | Characterization of the immunogenicity and pathogenicity of malate dehydrogenase in Brucella abortus显示文摘 | Xiangan Han Yongliang Tong Mingxing Tian Xiaoqing Sun Shaohui Wang Chan Ding Shengqing Yu | 2014 | World Journal of Microbiology and Biotechnology2014，，7： | 1 |
| 12 | Fast decoding of LDPC codes using quantization 显示文摘 | HE Yucheng SUN Shaohui WANG Xinmei | 2002 | IEE Electronics Letters2002，38，4： | 1 |
| 13 | Hybrid CSI-RS Transmission Mechanism-Based 3D Beamforming Scheme for FDD Massive MIMO System显示文摘Massive multiple-input multipleoutput(MIMO) refers to the idea that equipping base station(BS) with a large number of antenna elements,and features the ability of three dimensional(3D) beamforming technique to enable improvement in system performance.The prior works on massive MIMO generally rely on a common assumption of the whole channel characteristics are perfectly known at both user equipment(UE) and BS,however,this is quite difficult to realize in practical frequency division duplexing(FDD) system since the channel state information reference signal(CSIRS) overhead and CSI feedback overhead are proportional to the number of antenna elements.In this paper,two hybrid CSI-RS transmission mechanism-based 3D beamforming schemes are proposed in FDD massive MIMO system,in which non-beamformed CSI-RS configuration is utilized in conjunction with beamformed CSIRS configuration.In the proposed schemes,an angle quantization-based vertical codebook and a DFT-based horizontal codebook are designed,respectively,and an eigenvalue decompositionbased precoding matrix indicator(PMI)selection algorithm is also proposed for CSI acquisition.Simulation results show that the proposed 3D beamforming schemes achieve significant improvement in system capacity without incurring excessive CSI-RS overhead. | Fangchao Zhang Shaohui Sun Qiubin Gao Hui Li | 2016 | China Communications2016，13，S2： | 1 |
| 14 | Loading-Balance Relay-Selective Strategy Based on Stochastic Dynamic Program显示文摘A Relay-Assisted(RA) network with relay selection is considered as a type of effective technology to improve the spectrum and energy efficiency of a cellular network. However, loading balance of the assisted relay node becomes an inevitable bottleneck in RA network development because users do not follow uniform distribution. Furthermore, the time-varying channel condition of wireless communication is also a major challenge for the RA network with relay selection. To solve these problems and improve the practicability of the RA network, a Loading Balance-Relay Selective(LBRS) strategy is proposed for the RA network in this paper. The proposed LBRS strategy formulates the relay selection of the RA network under imperfect channel state information assumption as a Multistage Decision(MD) problem. An optimal algorithm is also investigated to solve the proposed MD problem based on stochastic dynamic program. Numerical results show that the performance of the LBRS strategy is better than that of traditional greedy algorithm and the former is effective as an exhaustive search-based method. | Wei Zhao Lin Zhao Weidong Wu Sigen Chen Shaohui Sun Yong Cao | 2018 | Tsinghua Science and Technology2018，23，4： | 1 |
| 15 | The study of esterifying reaction between epoxy resins and carboxyl acrylic polymers in the presence of tertiary amine显示文摘 | SHAOHUI SUN PEIQIN SUN DAZHUANG LIU | 2005 | European Polymer Journal2005，41，5： | 1 |
| 16 | Fast Decoding of LDPC Codes Using Quantization显示文摘 | He Yucheng Sun Shaohui Wang Xinmei | 2002 | IEE Electronics Letters2002，38，4： | 1 |
| 17 | Engineering the morphology/porosity of oxygen-doped carbon for sulfur host as lithium-sulfur batteries显示文摘Despite the intriguing merits of lithium-sulfur(Li-S) systems, they still suffer from the notorious‘‘shuttling-effect' of polysulfides. Herein, carbon materials with rational tailoring of morphology and pores were designed for strong loading/adsorption with the controlling of energy-storage ability.Through rational tailoring, it is strongly verified that such engineering of evolutions result in variational of sulfur immobilization in the obtained carbon. As expected, the targeted sample delivers a stable capacity of 925 m Ah g^(-1) after 100 loops. Supporting by the 'cutting-off' manners, it is disclosed that mesopores in carbon possess more fascinated traits than micro/macropores in improving the utilization of sulfur and restraining Li_(2)S_x(4≤x≤8). Moreover, the long-chain polysulfide could be further consolidated by auto-doping oxygen groups. Supported by in-depth kinetic analysis, it is confirmed that the kinetics of ion/e-transfer during charging and discharging could be accelerated by mesopores, especially in stages of the formation of solid S_(8) and Li_(2)S, further improving the capacity of ion-storage in Li-S battery. Given this, the elaborate study provide significant insights into the effect of pore structure on kinetic performance about Li-storage behaviors in Li-S battery, and give guidance for improving sulfur immobilization. | Limin Zhang Wenqing Zhao Shaohui Yuan Feng Jiang Xingqi Chen Yue Yang Peng Ge Wei Sun Xiaobo Ji | 2021 | Journal of Energy Chemistry2021，30，9： | 1 |
| 18 | Estimating heat capacities of liquid organic compounds based on elements and chemical bonds contribution显示文摘Molecular property depends on the property, the number of the elements, and the interaction between elements(such as chemical bonds). Based on the above-mentioned idea, two methods to estimate the isobaric heat capacity of liquids organic compounds were developed. Ten elements groups and 32 chemical bond groups were defined by considering the structure of organic compounds. The group contribution values and correlation parameters were regressed by the ridge regression method with the experiment data of 1137 compounds. The heat capacity can be calculated by summating the contributions of the elements and chemical bond groups. The two methods were compared with existing group contribution methods, such as Chickos, Zabransky-Ruzicka, and Zdenka Kolska. The results show that those new estimation methods' overall average relative deviations were 5.81% and 5.71%, which were lower than the other three methods. Those methods were more straightforward in compound splitting.Those new methods can be used to estimate the liquid heat capacity of silicon-containing compounds,which the other three methods cannot estimate. The new methods are more accessible, broader, and more accurate. Therefore, this research has important scientific significance and vast application prospects. | Li Xia Yule Pan Tingting Zhao Xiaoyan Sun Shaohui Tao Yushi Chen Shuguang Xiang | 2023 | Chinese Journal of Chemical Engineering2023，57，5： | 0 |
| 19 | Study of IMT-advanced heterogeneous network显示文摘Referring to research on the Heterogeneous Network(Het-Net) application scenario and technique characters in IMT-Advanced(The 4th Generation Mobile Communications) cellular system,this paper provides further analysis on main technique aspects of Heterogeneous Network,discussion on interference issue due to multi-layer building by access points and their corresponding solutions from standardization and engineering implementation. The proposed solution can effectively solve the interference problem in IMT-advanced Het-Net,and also improves the networking performance dramatically for future mobile communication systems. | Qin Fei Peng Ying Sun Shaohui Wang Yingmin | 2011 | Engineering Sciences2011，9，4： | 0 |
| 20 | Design and test of the key components for a combing-type tobacco harvester显示文摘In response to the problems of low efficiency,high labor intensity,and low mechanization in manual tobacco harvesting,a comb-off tobacco picking device for southern hilly tobacco areas was designed following the agronomic requirements and the principle of manual picking of tobacco harvesting in southern China.The device was composed of the power chassis,picking mechanism,and storage mechanism.This study involved the theoretical analysis,structural design,and modeling of the key components,such as chassis structure,combing-type picking mechanism,and power synchronization mechanism.The results of the motion analysis and calculation of the picking process demonstrated that the adjustment range of the comb chain elevation angles was from 12.4°to 20.9°,the comb rod installation distance was 76.2 mm,and the synchronizing mechanism transmission ratio was 3:10.One-factor test and three-factor three-level orthogonal test was performed with the forward speed of the chassis,the distance between the picking device baffles and the elevation angle of the chain with the combing bar as test factors,and the rate of broken and missed tobacco picking as evaluation indicators.It was revealed that the optimal combination of the forward speed of the chassis,the distance between the baffles,and the chain elevation angle were 1.5 km/h,75 mm,and 12.4°,respectively.Moreover,verification tests suggested that the breakage rate of tobacco leaves was 9.99%,and the probability of missed tobacco picking was 7.31%,both of which satisfy the agriculture requirements and the operational requirements in the agricultural machinery certification syllabus. | Chaoran Sun Shaohui Tan Songling Sun Mingtao Xiao Limei Chen Wenke Ai Zhihua Qiu Ping Jiang Yang He | 2024 | International Journal of Agricultural and Biological Engineering2024，17，1： | 0 |
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