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| 1 | Studies and advances on joint source-channel encoding/decoding techniques in flow media communications显示文摘Joint source-channel coding/decoding (JSCC/JSCD) techniques in flow media communications have become a state-of-the-art and one of the challenging research subjects in the spatial communication area. They have great application prospective and deep impact in various manned space flights, satellite missions, mobile radio communications and deep-space explorations. In the last few years, there have been influential achievements in JSCC/JSCD studies. This paper aims at an introduction to the basic principles of joint source-channel optimal design. A general summarization and classification for various existing JSCC/JSCD methods is addressed. Also presented is a JSCD scheme based on variable-length coding, capable of providing reliable resolutions for flow media data transmission in spatial communications. | TU GuoFang LIU JianJun ZHANG Can GAO ShaoShuai LI ShiDong | 2010 | Science China(Information Sciences)2010，53，1： | 8 |
| 2 | Convolutional Neural Networks Based Indoor Wi-Fi Localization with a Novel Kind of CSI Images显示文摘Indoor Wi-Fi localization of mobile devices plays a more and more important role along with the rapid growth of location-based services and Wi-Fi mobile devices.In this paper,a new method of constructing the channel state information(CSI)image is proposed to improve the localization accuracy.Compared with previous methods of constructing the CSI image,the new kind of CSI image proposed is able to contain more channel information such as the angle of arrival(AoA),the time of arrival(TOA)and the amplitude.We construct three gray images by using phase differences of different antennas and amplitudes of different subcarriers of one antenna,and then merge them to form one RGB image.The localization method has off-line stage and on-line stage.In the off-line stage,the composed three-channel RGB images at training locations are used to train a convolutional neural network(CNN)which has been proved to be efficient in image recognition.In the on-line stage,images at test locations are fed to the well-trained CNN model and the localization result is the weighted mean value with highest output values.The performance of the proposed method is verified with extensive experiments in the representative indoor environment. | Haihan Li Xiangsheng Zeng Yunzhou Li Shidong Zhou Jing Wang | 2019 | China Communications2019，16，9： | 7 |
| 3 | BMPR2 and HIF1-α overexpression in resected osteosarcoma correlates with distant metastasis and patient survival显示文摘Objective: Bone morphogenetic protein receptor 2(BMPR2) and hypoxia-inducible factor 1-α(HIF1-α) existed abnormal expression in several types of cancer. However, their expressions and related roles in osteosarcoma are largely unknown.Methods:To investigate the clinical significance of BMPR2 and HIF1-αin osteosarcoma,we analyzed their expression levels in 103 osteosarcoma specimens by immunochemistry.Meanwhile,we conducted a follow-up to examine the metastatic behavior and overall survival(OS)of osteosarcoma patients.Results:Among 103 tissues,61 cases had BMPR2-positive expression and 57 cases had HIF1-αpositive expression.A significant correlation was noticed between BMPR2 and HIF1-αexpression in osteosarcoma specimens(P=0.035).Receiver-operating characteristic(ROC)curves were calculated to investigate the predictive value of the two markers in tumor metastasis.By means of univariate and multivariate analysis,BMPR2 and HIF1-αexpression,as well as higher tumor grade,were identified as significant risk factors for OS in patients with osteosarcoma.Kaplan-Meier survival analysis revealed that the patients with BMPR2 and HIF1-αpositive expression had worse OS compared with patients with BMPR2-negative or HIF1-α-negative staining.Conclusions:It can be concluded that BMPR2 and HIF1-αexpression is highly correlated with metastatic behavior in patients with osteosarcoma and can serve as predictive markers for metastasis and OS of these patients. | Shidong Wang Tingting Ren Yi Huang Xing Bao Kunkun Sun Danhua Shen Wei Guo | 2017 | Chinese Journal of Cancer Research2017，29，5： | 7 |
| 4 | Energy-Efficient Resource Allocation for Small-Cell Networks:A Stable Queue Perspective显示文摘The small-cell technology is promising for spectral-efficiency enhancement. However, it usually requires a huge amount of energy consumption. In this paper, queue state information and channel state information are jointly utilized to minimize the time average of overall energy consumption for a multi-carrier small-cell network, where the inter-cell interference is an intractable problem. Based on the Lyapunov optimization theory, the problem could be solved by dynamically optimizing the problem of user assignment, carrier allocation and power allocation in each time slot. As the optimization problem is NP-hard, we propose a heuristic iteration algorithm to solve it. Numerical results verify that the heuristic algorithm offers an approximate performance as the brute-force algorithm. Moreover, it could bring down the overall energy consumption to different degrees according to the variation of traffic load. Meanwhile, it could achieve the same sum rate as the algorithm which focuses on maximizing system sum rate. | Hongxin Wei Wei Feng Yunzhou Li Shidong Zhou | 2017 | China Communications2017，14，10： | 7 |
| 5 | The Mars rover subsurface penetrating radar onboard China's Mars 2020 mission显示文摘China's Mars probe,named Tianwen-1,including an orbiter and a landing rover,will be launched during the July-August 2020 Mars launch windows.Selected to be among the rover payloads is a Subsurface Penetrating Radar module(RoSPR).The main scientific objective of the RoSPR is to characterize the thickness and sub-layer distribution of the Martian soil.The RoSPR consists of two channels.The low frequency channel of the RoSPR will penetrate the Martian soil to depths of 10 to 100 m with a resolution of a few meters.The higher frequency channel will penetrate to a depth of 3 to 10 m with a resolution of a few centimeters.This paper describes the design of the instrument and some results of field experiments. | Bin Zhou ShaoXiang Shen Wei Lu Qing Liu ChuanJun Tang ShiDong Li GuangYou Fang | 2020 | Earth and Planetary Physics2020，4，4： | 6 |
| 6 | Wireless channel feature extraction via GMM and CNN in the tomographic channel model显示文摘Wireless channel modeling has always been one of the most fundamental highlights of the wireless communication research.The performance of new advanced models and technologies heavily depends on the accuracy of the wireless CSI(Channel State Information).This study examined the randomness of the wireless channel parameters based on the characteristics of the radio propagation environment.The diversity of the statistical properties of wireless channel parameters inspired us to introduce the concept of the tomographic channel model.With this model,the static part of the CSI can be extracted from the huge amount of existing CSI data of previous measurements,which can be de ned as the wireless channel feature.In the proposed scheme for obtaining CSI with the tomographic channel model,the GMM(Gaussian Mixture Model)is applied to acquire the distribution of the wireless channel parameters,and the CNN(Convolutional Neural Network)is applied to automatically distinguish di erent wireless channels.The wireless channel feature information can be stored oine to guide the design of pilot symbols and save pilot resources.The numerical results based on actual measurements demonstrated the clear diversity of the statistical properties of wireless channel parameters and that the proposed scheme can extract the wireless channel feature automatically with fewer pilot resources.Thus,computing and storage resources can be exchanged for the nite and precious spectrum resource. | Haihan Li Yunzhou Li Shidong Zhou Jing Wang | 2017 | Journal of Communications and Information Networks2017，2，1： | 6 |
| 7 | Simulating sensitivities of Changbai Mountain forests to potential climate change显示文摘SimulatingsensitivitiesofChangbaiMountainforeststopotentialclimatechange￥YanXiaodong;ZhaoShidong(InstituteofAppliedEcology.Ch... | Yan Xiaodong Zhao Shidong (Institute of Applied Ecology. Chinese Academy of Sciences,Shenyang 110015, China) | 1996 | Journal of Environmental Sciences1996，8，3： | 5 |
| 8 | A Learning-Based Channel Model for Synergetic Transmission Technology显示文摘It is extensively approved that Channel State Information(CSI) plays an important role for synergetic transmission and interference management. However, pilot overhead to obtain CSI with enough precision is a significant issue for wireless communication networks with massive antennas and ultra-dense cell. This paper proposes a learning- based channel model, which can estimate, refine, and manage CSI for a synergetic transmission system. It decomposes the channel impulse response into multiple paths, and uses a learning-based algorithm to estimate paths' parameters without notable degradation caused by sparse pilots. Both indoor measurement and outdoor measurement are conducted to verify the feasibility of the proposed channel model preliminarily. | Liang Chen Li Haihan Li Yunzhou Zhou Shidong Wang Jing | 2015 | China Communications2015，12，9： | 4 |
| 9 | Distributed antenna wireless communication system coverage design and field trial over higher frequency band显示文摘This paper aims to examine the architecture design of a distributed antenna based Gbps wireless communication system using the high frequency band.In order to analyze the feasibility of the higher frequency band applications,the cumulative distribution of simulated user throughput in a cellular is investigated firstly.It shows that capacity improvement can be obtained using higher operating frequency band,especially in hotspot scenarios.Secondly,the architecture of the distributed antenna system(DAS) is introduced to overcome the disadvantages of weak coverage and rank deficient for the traditional multiple-input multiple-output(MIMO) systems using higher frequency bands in line-of-sight(LOS)environments.In addition,a software-defined-radio(SDR) based Gbps wireless transmission system with scalable hardware architecture is designed and implemented.Finally,a demo of outdoor DAS coverage for high data throughput application is given.Field trials show that 1 Gbps data rate and a large coverage in outdoor environments can be achieved over 6.05 GHz.It is proved that the Gbps DAS system at a higher frequency band can be a successful model for future wireless broadband coverage in hotspot scenarios. | Xu Zhan Liu Jienan Zhou Shidong Chen Xiang Wang Wenqi | 2016 | 仪器仪表学报2016，37，S1： | 4 |
| 10 | Estimating and mapping forest biomass in northeast China using joint forest resources inventory and remote sensing data显示文摘Being able to accurately estimate and map forest biomass at large scales is important for a better understanding of the terrestrial carbon cycle and for improving the effectiveness of forest management. In this study, forest plot sample data, forest resources inventory(FRI) data, and SPOT Vegetation(SPOT-VGT) normalized difference vegetation index(NDVI) data were used to estimate total forest biomass and spatial distribution of forest biomass in northeast China(with 1 km resolution). Total forest biomass at both county and provincial scales was estimated using FRI data of 11 different forest types obtained by sampling 1156 forest plots, and newly-created volume to biomass conversion models. The biomass density at the county scale and SPOT-VGT NDVI data were used to estimate the spatial distribution of forest biomass. The results suggest that the total forest biomass was 2.4 Pg(1 Pg = 10^(15) g), with an average of 77.2 Mg ha^(-1), during the study period. Forests having greater biomass density were located in the middle mountain ranges in the study area. Human activities affected forest biomass at different elevations, slopes and aspects. The results suggest that the volume to biomass conversion models that could be developed using more plot samples and more detailed forest type classifications would be better suited for the study area and would provide more accurate biomass estimates. Use of both FRI and remote sensing data allowed the down-scaling of regional forest biomass statistics to forest cover pixels to produce a relatively fineresolution biomass map. | Xinchuang Wang Shidong Wang Limin Dai | 2018 | Journal of Forestry Research2018，29，3： | 4 |
| 11 | DISTRIBUTION PATTERNS OF LEAF AREA INDEX FOR MAJOR CONIFEROUS FOREST TYPES IN CHINA显示文摘Leaf area index (LAI) of natural vegetation is recognized as the most important variable for measuring vegetation structure over large areas, and for relating it to energy and mass exchange, which has been successfully estimated from satellite resolution sensors. In this paper, according to the statistical analysis based on a lot of forest plots, the mathematical models of LAI distribution patterns in the hydro thermal spaces for five coniferous forest types in China were established. For the cold temperate larch forests growing in the dry and cold climate, their LAI increases with the increasing of warm index and precipitation in the way of hyperbolic quadratic surface. For the cold temperate spruce fir forests and temperate Pinus tabulaeformis forests, their LAI is negatively related to the annual mean air temperature in the way of the natural exponential curve, in order to adapt to the water oppressed environments. For the subtropical Pinus massoniana forests and Cunninghamia lanceolata forests growing in the warm and moist climate, their LAI is related to the annual mean air temperature in the way of the parabolic quadratic curve. | Luo Tianxiang Li Wenhua Zhao Shidong Commission for Integrated Survey of Natural Resources, CAS, Beijing 100101 The People’s Republic of China | 1997 | Journal of Geographical Sciences1997，7，4： | 4 |
| 12 | Responses of Yellow Sea Cold Water Mass to Typhoon Bolaven显示文摘A two-month seabed-mounted observation(YSG1 area) was carried out in the western Yellow Sea Cold Water Mass(YSCWM) using an RDI-300 K acoustic Doppler current profiler(ADCP) placed at a water depth of 38 m in late summer, 2012. On August 2012, Typhoon Bolaven passed east of YSG1 with a maximum wind speed of 20 m s-1. The water depth, bottom temperature, and profile current velocities(including u, v and w components) were measured, and the results showed that the typhoon could induce horizontal current with speed greater than 70 cm s-1 in the water column, which is especially rare at below 20 meters above bottom(mab). The deepening velocity shear layer had an intense shear velocity of around 10 cm s-1 m-1, which indicated the deepening of the upper mixed layer. In the upper water column(above 20 mab), westward de-tide current with velocity greater than 30 cm s-1 was generated with the typhoon's onshore surge, and the direction of current movement shifted to become southward. In the lower water column, a possible pattern of eastward compensation current and delayed typhoon-driven current was demonstrated. During the typhoon, bottom temperature variation was changed into diurnal pattern because of the combined influence of typhoon and tidal current. The passage of Bolaven greatly intensified local sediment resuspension in the bottom layer. In addition, low-density particles constituted the suspended particulate matter(SPM) around 10 mab, which may be transported from the central South Yellow Sea by the typhoon. Overall, the intensive external force of the Typhoon Bolaven did not completely destroy the local thermocline, and most re-suspended sediments during the typhoon were restricted within the YSCWM. | LI Jianchao LI Guangxue XU Jishang QIAO Lulu MA Yanyan DING Dong LIU Shidong | 2019 | Journal of Ocean University of China2019，18，1： | 3 |
| 13 | Pilot Domain NOMA for Grant-Free Massive Random Access in Massive MIMO Marine Communication System显示文摘We propose a pilot domain non-orthogonal multiple access(NOMA)for uplink massive devices grant-free random access scenarios in massive multiple-input multiple-output(MIMO)maritime communication systems.These scenarios are characterized by numerous devices with sporadic access behavior,and therefore only a subset of them are active.Due to massive potential devices in the network,it is infeasible to assign a unique orthogonal pilot to each device in advance.In such scenarios,pilot decontamination is a crucial problem.In this paper,the devices are randomly assigned non-orthogonal pilots which are constructed by a linear combination of some orthogonal pilots.We show that a bipartite graph can conveniently describe the interference cancellation(IC)processes of pilot decontamination.High spectrum efficiency(SE)and low outage probability can be obtained by selecting the numbers of orthogonal pilots according to the given probability distribution.Numerical evaluatioDs show that the proposed pilot domain NOMA decreases the outage probability from 20%to 2 e-12 at the SE of 4 bits/s/Hz for a single device,compared to the conventional method of slotted ALOHA with 1024 antennas at the BS,or increases the spectrum efficiency from 1.2 bits/s/Hz to 4 bit/s/Hz at the outage probability of2 e-12 in contrast with the Welch bound equality(WBE)non-orthogonal pilots. | Yongxin Liu Ming Zhao Limin Xiao Shidong Zhou | 2020 | China Communications2020，17，6： | 3 |
| 14 | Experimental Study on Refinery Gas Desulfurization Using Gas-Liquid Membrane Contactor显示文摘与 polytetrafluoroethylene ( PTFE )或聚丙烯( PP )装备的煤气液体的电流接触器恐水病的膜被申请从精炼厂 gas.Pure 水的硫二氧化物的移动,当为 SO2 的分离的二种膜的 absorbents.The 表演以与增加的吸收剂 concentration.Upon 增加的 SO2 的移动的吸收剂答案, SO2 的集中,和feed 流动 rate.The 效率的集中被评估, NaOH 答案和 MDEA | Han Yongjia Wang Shuli Li Hui Xi Chunman Zhou Shidong | 2009 | China Petroleum Processing & Petrochemical Technology2009，11，3： | 3 |
| 15 | Experimental Investigation on Promoting Effect of Composite Promoting Agents on Natural Gas Hydrate Formation显示文摘An experiment on effects of composite promoting agents composed of surfactants and liquid hydrocarbons on hydrate formation was conducted and the hydrate formation temperature,pressure,induction time and rate in the presence of different composite promoting agent packages were measured.The surfactants used covered sodium dodecyl sulfate(SDS),sodium dodecyl benzene sulfonate(SDBS) and 2-octyl sodium dodecyl sulfate(GC20S),and the liquid hydrocarbon additives utilized included cyclopentane(CP) and methyl cyclohexane(MCH).It appeared that all these combinations of composite promoting agents could promote hydrate formation.The type II hydrate formation conditions using composite promoting agents composed of CP and GC20S were the mildest and the induction time was the shortest;whereas the type H hydrates formation conditions using composite promoting agents composed of MCH and GC20S were the mildest and the induction time was also the shortest. | Wang Shuli Wei Mingjiao Li Entian Zhou Shidong | 2012 | China Petroleum Processing & Petrochemical Technology2012，14，1： | 3 |
| 16 | PREPARATION OF TiNi SHAPE MEMORY ALLOY POROSINT BY SHS显示文摘PREPARATIONOFTiNiSHAPEMEMORYALLOYPOROSINTBYSHS①ChuChenglin,LiBo,WangShidong,ZhangShuge,YangXiaoxi,YinZhongdaBox4... | Chu Chenglin *, Li Bo ** , Wang Shidong ** , Zhang Shuge *** , Yang Xiaoxi *** , Yin Zhongda * * Box 433, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001 ** Analysis and Testing Center | 1997 | 中国有色金属学会会刊:英文版1997，7，4： | 3 |
| 17 | Fabrication of Non-woven Fabric-Based SERS Substrate for Direct Detection of Pesticide Residues in Fruits显示文摘In surface-enhanced Raman scattering(SERS),flexible substrate plays an important role in target molecular collection from various shape surfaces and increases the analytical sensitivity.In this study,silver nanoparticles(Ag NPs)were deposited on a non-woven fabric used as an SERS substrate by self-assembly,in situ growing or the self-assembly/in situ growing combination method.4-Aminothiophenol was selected as a model molecular for the evaluation of the SERS performance using the substrates.The Ag NPs substrate prepared by self-assembly/in situ growing method presented the best Raman enhancement effect and its enhancement factor was estimated as high as 3.59106.The substrate was applied to the determination of four pesticide residues on the surfaces of fruit samples through wipe sampling,and the results revealed the good reproducibility of SERS responses and high detection sensitivity.The prepared flexible substrate was simple to fabricate and environmentally friendly.It could be expected to be a useful tool in rapid on-site test of pesticide residues on fruit surfaces because of its high sensitivity,convenience and non-destructive characteristics. | Lemei Cai Zhuo Deng Jing Dong Shidong Song Yiru Wang Xi Chen | 2017 | Journal of Analysis and Testing2017，1，4： | 3 |
| 18 | Rapid velocity reduction and drift potential assessment of off-nozzle pesticide droplets显示文摘The droplet velocity and diameter significantly affect both the spatial drift loss and the interfacial deposition behaviors, thus determining the ultimate utilization efficiency during pesticide spraying.Investigating the spatial velocity and diameter evolutions can reveal the mechanism of drift loss and guide to design regulation strategy. Here, we explored the spatial velocity distribution of droplets after leaving the nozzle by particle image velocimetry technology and particle tracking model, considering that the effect of nozzle configuration and the air velocity. It shows that all droplets decelerate rapidly with the velocity attenuation ratio ranging from 50% to 80% within the region of 200 mm below the nozzle.The spatial velocity evolution differences between droplets in crossflow are determined by the competition of vertical drag force and net gravity, and the drag force sharply increases as the droplet diameter decreases, especially for that smaller than 150 μm. Based on the spatial evolution differences of the droplet velocity and diameter, a functional adjuvant was added to the liquid for improving the diameter distribution. And the drift loss was significantly reduced due to the reduction of the proportion of easily drifting droplets. | Shidong Xue Jingkun Han Xi Xi Junyi Zhao Zhong Lan Rongfu Wen Xuehu Ma | 2022 | Chinese Journal of Chemical Engineering2022，35，6： | 2 |
| 19 | Calculation method on shape finding of self-anchored suspension bridge with spatial cables显示文摘Based on the spatial model,a reliable and accurate calculation method on the shape finding of self anchored suspension bridge with spatial cables was studiedin this paper.On the principle that the shape of the main cables between hangers is catenary,the iteration method of calculating the shapes of the spatial main cables under the load of hanger forces was deduced.The reasonable position of the saddle was determined according to the shape and the theoretical joint point of the main cables.The shapes of the main cables at completed cable stage werecalculated based on the unchanging principle of the zero-stress lengths of the main cables.By using a numerical method combining with the finite element method,one self-anchored suspension bridge with spatial cables was analyzed.The zero-stress length of the main cables,the position of the saddle,and the pre-offsetting of the saddle of the self-anchored suspension bridge were given.The reasonable shapes of the main cables at bridge completion stage and completed cable stage were presented.The results show that the shape-finding calculation method is effective and reliable. | Yan HAN Zhengqing CHEN Shidong LUO Shankui YANG | 2009 | Frontiers of Structural and Civil Engineering2009，3，2： | 2 |
| 20 | Assessing the impact on groundwater safety of inter-basin water transfer using a coupled modeling approach显示文摘表面水和地下水总是以 a coupled 方式表现并且是 hydrologic 的主要部件周期。然而,表面水模拟模型和地下水模拟模型大部分时间独立被运用。表面水里的水力的变化的影响的很少模型焦点流动在地下水上,或明确地,一个水转移工程到的影响充满一条季节地干燥的隧道。在这研究,一个连接的表面水和地下水模拟模型被开发在地下水上估计一个 trans 盆水转向工程的影响。北京的典型平凡区域东方作为案例研究被选择,表示地下水的北京主要来源使用了喝水。Chaobai 河的一个表面水质量模型基于水优秀分析模拟节目(黄蜂) 被开发,并且一个地下水模型基于模块化的有限差别的地下水流动模型(MODFLOW ) 和模块化的 3-D 运输模型(MT3D ) 被开发。表面水模拟的结果为地下水模拟被用作输入。水层次和四沾染物(NH < 潜水艇 class= “ a-plus-plus ” > 3 -N, 货到付款 < 潜水艇 class= “ a-plus-plus ” > Mn , F,) 被模仿。与起始的一样和边界条件,情形分析被执行确定地下水环境上的转向水的不同数量的影响。结果证明地下水来源的水质量显著地没被影响。 | Haifeng JIA Shidong LIANG Yansong ZHANG | 2015 | Frontiers of Environmental Science & Engineering2015，9，1： | 2 |
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