Application of reconfigurable intelligent surface in beamforming and information modulation by Qiang CHENG, Junyan DAI, Junchen KE, Jingcheng LIANG, Siran WANG

“…In modern mobile communications, the randomness, uncertainty, and uncontrollability of wireless channels are the pivotalfactors that affect the communication quality, which often leads to the deterioration of the signal quality at the receiving terminal, and thereby limiting the rate and range of information transmission.In the emerging study of 6G technology, reconfigurable intelligent surface is one of the research directions under active discussions, which is an ultra-thin artificial surface composed of sub-wavelength structures with field programmability and spatiotemporal information modulation capabilities.The reconfigurable intelligent surface can manipulate electromagnetic waves accurately and efficiently, thus providing the possibility for reshaping the wireless propagation environment.In this review, the concept of the reconfigurable intelligent surface, the beam forming method based on spatiotemporal modulation, the wireless relay and the communication system based on the reconfigurable intelligent surface were reviewed and discussed.It demonstrates the great potential of reconfigurable intelligent surface in assisting mobile communication, and provides new ideas for the development of 6G.…”
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New Approach of Integration Space-Ground: Hotspots, Challenges, and Key Technologies of Direct-to-Smartphone by Yuanzhi HE, Lingcai YANG, Yongwei XIAO, Shijie ZHANG, Zhiqiang LI, Yun LIU

“…Direct-to-smartphone, as a potential technological means for achieving the integration of space and ground in the future, has received widespread attention from industry and academia.Compared with traditional satellite mobile communication, there are many challenges in the current direct-to-smartphone technology.The current development status and system architecture of two direct-to-smartphone technology routes based on synchronous orbit satellites and asynchronous orbit satellites were introduced, and the technical challenges from the air-interface side, satellite side, network side, and terminal side were summarized.Several solutions were proposed, included satellite-terrestrial synchronization, satellite-borne ultra-large array antenna, and satellite-terrestrial heterogeneous network roaming, providing technical support for the development of direct-to-smartphone technology.Finally, a brief outlook were provided.…”
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Frame synchronization algorithm based on delay-Doppler domain signal sparsity for OTFS system by CHEN Yang, YANG Haiyan, CHENG Kaiying, LIU Heng, MA Zheng

“…Additionally, the proposed scheme exhibited greater performance advantages over the preamble-based scheme as the moving speed increases, making it a more suitable option for high-speed or even ultra-high-speed mobile communication scenarios.…”
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LOW TEMPERATURE STORAGE OF ACTINOBACILLUS PLEUROPNEUMONIAE CULTURES by V. S. Rusaleyev, D. A. Vasilyev

“…In different collections the microorganism vitality is mainly maintained using the following methods: repeated passages, lyophilisation and storage with mineral oil at low and ultra low temperatures. Promising method of long-term storage of microorganisms includes cryopreservation that demonstrates a number of advantages. …”
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Study on 5G wireless network enhancement technology for time sensitive networks by Jincan XIN, Sen XU, Hua ZHANG, Shangkun XIONG, Hua XU

“…5G deterministic network is a new type of industrial communication technology vigorously promoted by the international industry.3GPP had introduced the time-sensitive communication technology to facilitate deterministic transmission.Compared with ultra-reliable and low-latency communication technology, time-sensitive communication technology further enhanced the 5G network in terms of delay jitter and time synchronization to realize the end-to-end time sensitive communication.Characteristics of time sensitive communication technology were analyzed.Based on the time-sensitive networking and 5G network converged architecture, the time-sensitive communication technology reduces the time synchronization error through the accurate time synchronization mechanism.Additionally, the scheduling enhancement mechanism was introduced to reduce the transmission delay.Furthermore, the Ethernet header compression mechanism was proposed to improve transmission efficiency.…”
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An survey on application of artificial intelligence in 5G system by Jianwu ZHANG, Luxin WANG, Lingfen SUN, Qianye ZHANG, Hangguan SHAN

“…With the continuous development of 5G, the era of the internet of everything is coming.Problems such as massive device connections, massive application requests, ultra-high network load and complex dynamic network environment pose great challenges to the optimization of 5G systems in the context of the internet of everything.Facing these challenges, artificial intelligence (AI) shows its unique advantages.Firstly, the advantages of deep learning driven AI algorithms in 5G system compared with conventional algorithms were briefly introduced.Then, the application of AI algorithms in multi-access edge computing (MEC) and mmWave massive multiple-input multiple-output (MIMO) system were described in detail, with advantages and disadvantages of each method being compared and analyzed.Finally, according to the existing research, the shortcomings of AI algorithms in 5G application scenarios were summarized and the future research directions were forecasted.…”
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Quasimultipliers on 𝐹-Algebras by Marjan Adib, Abdolhamid Riazi, Liaqat Ali Khan

“…Further, we establish several properties of the strict and quasistrict topologies on the algebra 𝑄𝑀(𝐴) of quasimultipliers of a complete 𝑘-normed algebra 𝐴 having a minimal ultra-approximate identity.…”
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6G oriented wireless communication channel characteristics analysis and modeling by Chengxiang WANG, Jie HUANG, Haiming WANG, Xiqi GAO, Xiaohu YOU, Yang HAO

“…,global coverage,all spectrums and all applications,we comprehensively survey 6G related wireless channel measurements,channel characteristics,and channel models for all frequency bands and all scenarios.Millimeter wave (mmWave),terahertz (THz),optical band,satellite,unmanned aerial vehicle (UAV),maritime,underwater acoustic,high-speed train (HST),vehicle-to-vehicle (V2V),massive/ultra-massive multiple-input multiple-output (MIMO),orbital angular momentum (OAM),and industry Internet of things (IoT) communication channels were particularly investigated.The related 6G channel measurement and modeling results were also given.Finally,future research challenges on 6G channel measurements and modeling were pointed out.…”
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High-Efficiency Electromagnetic Wave Controlling with All-Dielectric Huygens’ Metasurfaces by Zheng-bin Wang, Jin Shi, Jin-chang Chen

“…According to the same physical mechanism, we fabricate an electrically thin lens with concentric subwavelength dielectric blocks and integrate it with a patch antenna to form a three-dimensional (3D) ultra-low-profile lens antenna system. Full-wave simulation demonstrates the lens antenna’s excellent performances in high directivity, broadband, low loss, and low side-lobe levels.…”
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Dynamic Coefficients Identification of Water-Lubricated Hybrid Bearings Used in High-Speed Spindles with Different Excitation Methods by Lin Wang, Xianzhi Xiong, Hua Xu

“…As for different operating conditions, valuable guides were provided to investigate the dynamic performance of high-speed and ultra-high-speed spindles.…”
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BREEDING OF EARLY MATURING SOYBEAN VARIETIES IN EAST KAZAKHSTAN by S. V. Didorenko, Yu. N. Spryagaylova, A. I. Abugalieva

“…Since 2001, the East Kazakhstan Research Institute of Agriculture has been conducting the work aimed at the development and study of the collection of ultra-early and early soybean accessions in order to obtain new early-maturing and high-yielding cultivars adapted to the soil and climate environment of East Kazakhstan Region. …”
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Research on crowd flows prediction model for 5G demand by Zheng HU, Hao YUAN, Xinning ZHU, Wanli NI

“…The deployment and planning for ultra-dense base stations,multidimensional resource management,and on-off switching in 5G networks rely on the accurate prediction of crowd flows in the specific areas.A deep spatial-temporal network for regional crowd flows prediction was proposed,by using the spatial-temporal data acquired from mobile networks.A deep learning based method was used to model the spatial-temporal dependencies with different scales.External factors were combined further to predict citywide crowd flows.Only data from local regions was applied to model the closeness of properties of the crowd flows,in order to reduce the requirements for transmitting the globe data in real time.It is of importance for improving the performance of 5G networks.The proposed model was evaluated based on call detail record data set.The experiment results show that the proposed model outperforms the other prediction models in term of the prediction precision.…”
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Unpacking the Socio-Political Background of the Evolution of Boko Haram in Northern Nigeria: A Social Movement Theory Approach by Kingsley E. Amaechi, Rendani Tshifhumulo

“… In the last decade, Boko Haram (BH) has become notorious across the world, because of its militancy and ultra-fundamentalist activities. Its violent activities have in many ways surpassed other similar African Salafi-oriented organizations, such as the AQIM in Algeria and al-Shabaab in Somalia. …”
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Mayotte se prépare au risque tsunami : modélisations, alerte, évacuation, sensibilisation by Frédéric Leone, Monique Gherardi, Matthieu Péroche, Émilie Lagahé, Pierre Aumond, Jonathan Siliezar Montoya, Fahad Idaroussi Tsima, Pablo Poulain, Anne Le Friant, Anne Mangeney, Said Hachim Mogne, Valentin Roudier

“…The French ultra-marine territories are almost all concerned by the tsunami risk. …”
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İNGİLTERE’DE İDARENİN YARGISAL DENETİMİNDE MAHKEMELERE TANINAN AYRICALIKLI EMİR (PREROGATIVE REMEDY) VERME YETKİSİ by S. Burak Açdoyuran

“…İngiliz Hukukunda mahkemelerin Ayrıcalıklı Emir Verme yetkilerinin uygulanması yetki aşımı (ultra vires) temeline dayanmaktadır. Kara Avrupası sisteminde idarenin faaliyetlerinin yargısal denetiminde sözkonusu olan iptal ve tam yargı davaları, İngiliz hukukunda karşımıza mandamus, prohibition, certiorari, injunction, declaration ve habeas corpus isimleri altında çıkmaktadır. …”
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NEW PROGRESSIN RESEARCHON DAMAGEFOR CREEP FATIGUEOFMODERN TURBINE ROTOR by CUI Lu, SHI HongMei, LI Zhen, WANG Peng

“…In this paper,the progress in research onturbine rotor material have been introduced,and it is summarized that the damage evolution of rotor steel under low cyclic creep-fatigue loading and thermomechanical loading during start-up and shut-down process of ultra-super critical（ USC） steam turbine. In addition,several life assessment models used widely in engineering practice have been proposed. …”
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Intelligent and open new generation telecom service architecture and its key technologies by Jianxin LIAO, Hao ZHANG, Tong XU, Lingfei NI, Jingyu WANG, Wenfu WU

“…For complex heterogeneous networks,IOTSA (intelligent and open telecom service architecture) based on the comprehensive decoupling of service systems was proposed,as well as core mechanisms such as intelligent scheduling of network resources,dynamic service orchestration and combination,and intelligent monitoring of abnormal behavior.Through the establishment of a three-level interface and four-layer capability opening architecture,multi-granular capability opening and comprehensive resource sharing were realized,which met the needs of multiple scenarios.Key technologies such as low-risk and low-cost rapid decoupling of service systems and dynamic coordination of multiple services were proposed.These achievements had formed a series of international standards and had been applied on a large scale on existing networks.By providing a large number of ultra-fine-grained capabilities,396 atomic capabilities,and flexible composite capabilities,the development of operator and third-party services and applications were strongly supported.…”
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Two-step ranging based on energy detection for IR-UWB sensor networks by ZHANG Ting-ting1, ZHANG Qin-yu2, ZHANG Nai-tong1

“…In order to design a low computational and cost ranging method for the IR-UWB （impulse radio ultra wideband） wireless sensor network, a two-step DP （direct path） component TOA （time of arrival） estimation algorithm based on energy detection was proposed. …”
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A survey on 5G capabilities enabling the factories of the future by Yusun FU, Jinhui TANG

“…5G systems extend mobile communication services beyond mobile telephony, mobile broadband, and massive machine-type communication into new application domains, so-called vertical domains, with special requirements for communication services.A comprehensive analysis and summary of 5G capabilities enabling the factories of the future were provided, including resilient network architecture, flexible spectrum, ultra reliable and low latency communication, time sensitive network, security and positioning.While resilient network architecture includes network slicing, non-public network, 5G LAN, and edge computing.It hopes to have a thorough and comprehensive understanding of the theoretical research and application of 5G, and a clear understanding of its challenges, so as to play a key reference for researchers and engineers in the related fields.…”
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A Two-Stage Regularization Method for Variable Selection and Forecasting in High-Order Interaction Model by Yao Dong, He Jiang

“…To enhance the forecasting accuracy and training speed simultaneously, an interpretable model is essential in knowledge recovery. To deal with ultra-high dimensionality, this paper investigates and studies a two-stage procedure to demand sparsity within high-order interaction model. …”
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