Research on the enhancement and key technologies of 5G network for satellite-terrestrial integration by ZHANG Jianyin, NI Lingfei, WANG Hanbai, GU Shangming, LIU Yu, LIU Jinglei

“…Satellites have the advantages of complementing terrestrial 5G network in terms of coverage, reliability and flexibility, especially the integration of low earth orbit (LEO) satellite and the terrestrial 5G network has been one of the hot topics in the industry. …”
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Development and Prospect of Satellite 5G Technology by Lijun ZHAI, Shuming PAN, Chunting WANG

“…With the development of new broadband satellite communication constellation, the fusion of satellite communication and 5G has become a hot spot in the communication industry.The current status of the development of satellite 5G was summarized, and the work achievements of 3GPP, ITU, SaT5G and other international standard development organizations were introduced.On the basis, the overall architecture of satellite 5G network was proposed, the research and development were introduced such as networking under the condition of satellite dynamic topology, multi band satellite ground integration waveform design, multiple access to satellite IoT terminal, radio resource management and interference coordination.In addition, the feasibility of new technologies such as OTFS, nonorthogonal multiple access and interference coordination of NGSO and GSO based on spectrum sensing were explored.Finally, the development of the 6G phase of integrated satellite and terrestrial networks was presented.…”
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Overview of OTFS Based Channel Estimation Techniques in LEO Satellite Communication by Xinjie ZHAO, Ziwei LIU, Gengxin ZHANG

“…With the development of science and technology and the continuous improvement of related technologies, low earth orbit (LEO) satellite communication has become a hot technology that countries all over the world are chasing.The advantages of orthogonal time frequency spacetechnology can well solve the signal transmission problem of broadband satellite ground link in high moving speed scenarios, which is conducive to the unifi cation of modulation waveforms between satellites and the ground, and the realization of space-based integrated communication.However, its transmission performance is aff ected by the accuracy of channel estimation, and the special modulation makes its channel estimation method diff erent from the traditional technology, so it needs to be studied.The existing mainstream OTFS channel estimation schemes are introduced, and the advantages and disadvantages of each scheme were analyzed, which laied a foundation for subsequent research.…”
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Food Processing: The Meat We Eat by Erica L. Bub, Keith Schneider, Chad Carr, Matt Hersom

“…Meat processing technology is used to produce many of the foods we enjoy, such as hot dogs, hamburgers, and chicken nuggets. Recently, the media has focused on certain meat products, giving them names such as “pink slime” and “meat glue.” …”
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Energy dissipation balanced and reliable clustering algorithm for wireless sensor networks by Jun YUE, Wei-ming ZHANG, Wei-dong XIAO, Da-quan TANG, Jiu-yang TANG

“…A novel clustering algorithm for wireless sensor networks was proposed to resolve the hot spot problem and the single failure problem.The algorithm divided the network into unequal grids,and the nodes in the same grid form a cluster.The number of cluster heads in each grid was determined according to the failure probability of nodes,and the data collection of nodes in a grid was implemented by multiple cluster heads of the grid cooperatively.By adjusting the number of nodes that could participate in cluster head rotation of each grid,the algorithm was able to balance the energy dissipation of nodes on a long view.The algorithm reduced the reliance of cluster members to single cluster head by forming cluster with multiple cluster heads.Furthermore,the algorithm adopted some measures to diminish energy consumption.Simulation results show that the algorithm has higher balanced extent of energy dissipation and reliability of data collection,and prolongs the lifetime of network.…”
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Software defined intelligent satellite-terrestrial integrated wireless network by Shuo YUAN, Yijing REN, Zeyu WANG, Yaohua SUN, Mugen PENG

“…With the superiorities of providing network services for all scenarios of three-dimensional space, air, ground, and ocean, and satisfying the future network differential requirements on all services, the satellite-terrestrial integrated network (STIN) has become a hot spot in the development of 6G.Firstly, the current research development of the low-orbit satellite constellation and STIN were reviewed, and the challenges faced by the integrated satellite-terrestrial networking were discussed.Then, the software defined intelligent system architecture of the integrated satellite-terrestrial wireless network based on distributed SDN controllers was proposed to address the characteristics of STIN such as the complex architecture, high dynamic of network topology, the heterogeneity of network devices and protocols, which facilitated efficient satellite-terrestrial collaborative network management and control.In the end, the key techniques of the satellite-terrestrial flexible and reconfigurable collaborative networking were outlined, and the future development were presented.…”
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Food Processing: The Meat We Eat by Erica L. Bub, Keith Schneider, Chad Carr, Matt Hersom

“…Meat processing technology is used to produce many of the foods we enjoy, such as hot dogs, hamburgers, and chicken nuggets. Recently, the media has focused on certain meat products, giving them names such as “pink slime” and “meat glue.” …”
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Source cell-phone identification from recorded speech using non-speech segments by Anshan PEI, Rangding WANG, Diqun YAN

“…Source cell-phone identification has become a hot topic in multimedia forensics.A novel cell-phone identification method was proposed based on the silent segments of recorded speech.Firstly,the silent segments were obtained using adaptive endpoint detection algorithm.Then,the mean of Mel frequency coefficients (MFC) was extracted as the characteristics for device identification.Finally,the CfsSubsetEval evaluation function of WEKA platform was selected according to the best priority (BestFirst) search,and support vector machine (SVM) was used for classification.Twenty-three popular models of the cell-phones were evaluated in the experiment.Experimental results show that the proposed method is feasible and the average recognition rates are 99.23% and 99.00% on the TIMIT database and the CKC-SD database.At the same time,the proposed feature performs was demonstrated better than the MFC features and the Mel frequency cepstrum coefficients (MFCC) features of the speech segments.…”
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Acer palmatum 'Bloodgood' by Edward F. Gilman

“… 'Bloodgood' Japanese maple has a round shape with a height and spread of about 20 feet, making it nicely suited to residential landscapes (Figure 1). …”
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Personalized recommendation model with multi-level latent features by Qing SHEN, Wenbin GUO, Jungang LOU, Qiangguo YU

“…Personalized recommendation has become one of the most effective means to solve information overload, and it is also a hot technology in the research field of massive data mining.However, traditional recommendation algorithms often only use the user’s rating information on the item, and lack a comprehensive consideration of the potential characteristics of the user and the item.The factorization machine, wide neural network, crossover network and deep neural network were combined to extract the shallow latent features, low-order nonlinear latent features, linear cross latent features, and high-order nonlinear latent features of users and items.Thus, a new deep learning personalized recommendation model with multilevel latent features was established.The experimental results on four commonly used data sets show that considering the multi-level potential features of users and items can effectively improve the prediction accuracy of personalized recommendations.Finally, the influence of factors such as the dimensions of the embedding layer and the number of neurons on the prediction performance of the new model was studied.…”
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Association rules recommendation algorithm supporting recommendation nonempty by Ming HE, Wei-shi LIU, Jiang ZHANG

“…Existing association rule recommendation technologies were focus on extraction efficiency of association rule in data mining.However,it lacked consideration of recommendation balance between popular and unusual data and efficient processing.In order to improve the quality and efficiency of personalized recommendation and balance the recommendation weight of cold and hot data,the problem of mining frequent itemset based on association rule was revaluated and analyzed,a new evaluation metric called recommendation RecNon and a notion of k-pre association rule were defined,and the pruning strategy based on k-pre frequent itemset was designed.Moreover,an association rule mining algorithm based on the idea was proposed,which optimized the Apriori algorithm and was suitable for different evaluation criteria,reduced the time complexity of mining frequent itemset.The theoretic analysis and experiment results on the algorithm show that the method improved the efficiency of data mining and has higher RecNon,F-measure and precision of recommendation,and efficiently balance the recommendation weight of cold data and popular one.…”
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Study on stress corrosion behavior and failure mechanism of galvanized bolts in complex coal mine environments by Zhe He, Nong Zhang, Zhengzheng Xie, Chao Ma, Changliang Han, Fan Zhang, Huiqing Wang, Saad S. Alarifi

“…Studies have shown that hot-dip galvanizing is an effective solution, but the first widespread application of galvanized bolts in Xin’Shang’Hai No. 1 coal mine, China, experienced extensive failures. …”
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ANALYSIS OF OIL PUMP STUCK PHENOMENON AND RESEARCH OF IMPROVED TECHNOLOGY by DU BaoJiang, YAN ShenLiang, ZHA Liang, YE QiHan, LI ShuangShuang

“…The numerical simulation analysis to inner flow field of the pump was conducted by adopting CFX,with the Ansys Workbench,the machine solid thermosetting coupling structure analysis for the driven part of hot oil pump was studied,and combined with Matlab curve fitting interpolation,the stuck causes were found; On the basis of hydrodynamic pressure lubrication,the minimum oil film thickness,temperature rise and the bearing capacity were as the key analysis factors,ultimately the appropriate solutions were concluded aiming at stuck reasons. …”
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Study on remote sensing satellites random access to internet constellation and on-orbit intelligent processing by Xiaoyu CHANG, Weijia ZHANG, Xudong1 LI, Xiaonan ZHANG, Gang WANG, Gang JIA

“…The low earth orbit (LEO) satellite Internet constellation is a hot spot in current global research.And it is highly anticipated that the LEO satellite Internet constellation supports random access to remote sensing satellites and direct on-orbit information processing.However, due to the different orbital heights, the difficult access problems of the bidirectional highly dynamic heterogeneous constellation will be caused.Firstly, the random access scenario under different orbit characteristics and satellite numbers of LEO satellite Internet constellation was set up, and the impact of the spatiotemporal discontinuous visibility and Doppler frequency shift on the remote sensing satellite access performance was focused on.Secondly, based on the characteristics of the random access scenario, the process of on-orbit processing tasks with different delays and the allocation of satellite-ground functions were analyzed.Finally, the problems existing in the current on-orbit intelligent processing algorithm and the focus of future research were expounded, so as to provide reliable theoretical support for the development and applications of LEO satellite Internet constellation and remote sensing satellites in the future.…”
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The Debate Between Realism and Formalism in Contemporary International Law (Emphasizing the Procedure of the International Court of Justice) by Sepanta Mojtahedzadeh

“…Both methods have supporters and each has presented arguments to strengthen their views. …”
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On the Benefits of Semi-Active Suspensions with Inerters by Xin-Jie Zhang, Mehdi Ahmadian, Kong-Hui Guo

“…Inerters have become a hot topic in recent years especially in vehicle, train, building suspension systems, etc. …”
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Development Status and Hotspot Visualized Analysis of Autonomous Vehicles Based on CiteSpace by Lixin Yan, Tao Zeng, Guangyang Deng, Qiujie Xu

“…The safety of autonomous driving has been a constant concern, with autonomous driving becoming a research focus in the world today. …”
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DESIGN AND RESEARCH OF NEW SUSPENDING BIDIRECTIONAL TIDAL CURRENT ENERGY GENERATION DEVICE by WANG ShiMing, LUO RuiDong, DONG Chao, DING ChengLin

“…The world is short of energy,tidal current energy has been a hot topic in many countries because of its superiority. …”
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Thoughts on the standardization evolution of 5G NTN network architecture by Jiancheng SUN, Jiaying SUN, Deshan MIAO, Chunlin LI

“…In recent years, 5G has been commercialized around the world in a large scale.However, considering the cost and geographical restrictions, traditional 5G networks still have trouble in providing seamless global communication.To reach the global area coverage, satellite and 5G technology integration has become a new hot topic in the communication industry.In 3GPP, the first release of 5G NTN technical specifications based on transparent payload architecture has been completed.Firstly, the standardization status of 5G NTN network architecture was introduced.Secondly, the shortcomings or issues existing in the current network architecture of 5G NTN were analyzed.Finally, three 5G NTN network architecture enhancement and optimization schemes were proposed, which including IAB-based network architecture, NTN adaptive network architecture and NTN multi-connection network architecture for intersatellite link construction and data shunt.The proposed architectures aim to providing valuable suggestions and references for the subsequent research, standardization and network deployment of 5G NTN.…”
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Targeted Therapy for Rheumatoid Arthritis in the New Era by WANG Jun, MENG Juan

“…In recent years, targeted therapy for RA has become a hot research topic and has made new breakthroughs. …”
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