A UWB NLOS identification method under pedestrian occlusion by Tong WU, Yeshen LI, Zhenhuang HUANG, Yu ZHANG, Wanle ZHANG, Ke XIONG

“…Ultrawideband (UWB) is a hot technology for indoor positioning with large bandwidth, strong anti-interference ability, and high multipath resolution capacity.However, due to the complex indoor environment, UWB signal propagation will inevitably be blocked, resulting in non-line-of-sight (NLOS) propagation, which greatly reduces the accuracy of UWB positioning.Therefore, identifying NLOS signals accurately and discarding or correcting them are important to alleviate the problem of the decline in positioning accuracy.The majority of present NLOS identification work focuses on scenes with building structures such as walls.Further discussion is needed for scenes obscured by pedestrians.Since the impact of human obstacles on the signals is more complex and cannot be ignored, the NLOS identification under pedestrian occlusion was studied.By comparing a variety of machine learning methods and signal feature combinations, the random forest method based on the three-dimensional features of the first path signal power, the received signal power, and the measured distance was proposed.These features with fewer dimensions and easy extraction were used to achieve a high identification percentage for NLOS.The experimental results based on the measured data of different devices show that the NLOS identification accuracy based on the proposed method reaches 99.05%, 99.32% and 98.81% respectively.…”
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Social entrepreneurship in rural areas as illustrated by social cooperatives in Poland’s Masovian Voivodeship by Małgorzata Błażejowska

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Analysis of Three Penicillin Antibiotics (Ampicillin, Amoxicillin and Cloxacillin) of Several Iranian Pharmaceutical Companies by HPLC by A. Ashnagar, N. Gharib Naseri

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Female genital tract microbiome: the influence of probiotics on assisted reproduction by Ana Sofia Almeida Santana, Ana Margarida Póvoa

“…Abstract Assisted reproductive technology (ART) has been evolving since 1978, with the number of techniques performed increasing over the years. …”
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Intelligent Diagnosis Method of Gear Faults based on MGAN and CNN by Zheng Li, Shengli Wu, Wenting Xing, Shiyong Liao

“…The real gear signals are transformed into time-frequency signals by time-frequency transformation technology after morphological filtering，and new samples are synthesized by MGAN to obtain a balanced data set，which overcomes the problem of insufficient samples. …”
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Research on Spam Filters Based on NB Algorithm by Su Shengyue

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EMPIRICAL STUDY OF INFLUENCE OF FINANCIAL INNOVATION ON ORGANISATIONAL PERFORMANCE OF SELECTED NIGERIAN INSURANCE COMPANIES by Oloruntoba Oyedele

“… Despite the proliferation of information technology, many Nigerian insurers do not deploy fully integrated computer software system. …”
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Starlink Business Model and Network Mode Under the Direct-to-Satellite Service of Mobile Phone by Yuanxing XUE, Zhi ZHAO, Qiaoman DUAN

“…The paper initially provided a brief comparison of the direct-to-satellite solution of three LEO satellite communication companies: Starlink, AST SpaceMobile and Lynk Global.While Starlink has successfully conducted with SMS, Voice and Data service test, AST SpaceMobile and Lynk Global have not made significant progress.Although all are in early stages, their technological paths demonstrate the future trends of direct-to-satellite communication.Focused on Starlink's success, the paper analyzed its business model and explored the primary technological pathways for future integration of space, air and ground telecommunication systems, which was a hot topic in the industry.Based on publicly available information about Starlink, the paper utilized the business model canvas theory to delved into its direct-to-satellite service, detailing aspects like core value, key resources, customer segments, cost structure, customer relations, key partnership, and revenue streams.It then discussed Starlink's network architecture strategies, compared and analyzed the self-built core network and shared core network approaches, ultimately inferring the most viable network technology solution for Starlink.…”
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Analytically Simple and Computationally Efficient Results for the GIX/Geo/c Queues by Mohan L. Chaudhry, James J. Kim, Abhijit D. Banik

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Structural and Electrical Properties of Graphene Oxide-Doped PVA/PVP Blend Nanocomposite Polymer Films by S. K. Shahenoor Basha, K. Vijay Kumar, G. Sunita Sundari, M. C. Rao

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Solving a Vehicle Routing Problem under Uncertainty by a Differential Evolution Algorithm by Alireza Salamatbakhsh, Reza Tavakkoli-Moghaddam, Ali Pahlevani

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Real-Time Incident Detection and Capacity Estimation Using Loop Detector Data by Syed Muzammil Abbas Rizvi, Afzal Ahmed, Yongjun Shen

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Multi-source data security protection of smart grid based on combination key by Jian GAO, Wenbin CHEN, Jianmin PANG, Huadong YU, Guorui SONG

“…As an important infrastructure of power system,power communication network has deployed a large number of widely distributed business terminals and communication terminals,whose data security is related to the safe and stable operation of the entire power network.In order to avoid the situation that the information cannot be safely exchanged due to the shortage of keys.The sharding and combination technology based on keys was proposed to realize the expansion of limited keys,so as to solve the problem of a large number of keys needed for multi-node and mul-ti-service.Firstly,a sharding scheme was obtained according to different conditions.A key was divided into several dif-ferent sub-key pieces,and then a new key was generated by combining these key pieces and distributed to different ter-minals in the system.A large number of combined keys generated were conducive to update key ,which could ensure the data service “one at a time” and effectively enhance the communication system's ability to resist damage and invasion.Through analysis and calculation,the effectiveness of this method in realizing real-time update of a large number of ter-minal business keys with limited keys was further verified,and data secure communication was realized.…”
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Study on Concentrating Characteristics of a Solar Parabolic Dish Concentrator within High Radiation Flux by Qianjun Mao, Liya Zhang, Hongjun Wu

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Influence of oncam feature in online conference on learning motivation during the pandemic by Muchammad Zidan Maulana, Azzahra Putri Dewanto

“…Participants in this study were 42 active students at the Indonesian Education University, Department of Educational Curriculum and Technology batch 2020. Based on the data obtained, it was shown that the oncam feature could affect respondents' motivation level in learning. …”
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Prediction of Concrete Compressive Strength by Evolutionary Artificial Neural Networks by Mehdi Nikoo, Farshid Torabian Moghadam, Łukasz Sadowski

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Monitoring of Nitrogen Transport Data in Pear Leaves Based on Infrared Spectroscopy by Zehua Fan, Desheng Wang, Nannan Zhang

“…The near-infrared reflection spectrum imaging technology is used to collect the leaf scale spectral image of the target crop. …”
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Optimal Payments to Connected Depositors in Turbulent Times: A Markov Chain Approach by Dávid Csercsik, Hubert János Kiss

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Application of Polymer Nanocolloid Preparation in Stability Analysis of Motion Mechanics by Jun Jia, Fengyuan Sun

“…Therefore, the preparation technology of nanomaterials is one of the current research hotspots and has broad application prospects. …”
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Evgeny Nikolaevich Sedov: a leading breeder of pome fruit crops in Russia by A. M. Galasheva, Т. V. Yanchuk, N. G. Krasova

“…Evgeny Nikolaevich Sedov, Doctor of Agricultural Sciences, Full Member of the Russian Academy of Agricultural Sciences, Full Member of the Russian Academy of Sciences, Professor, Scientist Emeritus, is an outstanding researcher and breeder, author of 90 apple and pear cultivars, founder of a scientific school specializing on priority trends in pome fruit breeding: – development of adaptable triploid apple cultivars with regular fruiting, high marketability of fruits, and increased self-fertility; – development of apple cultivars immune or highly resistant to scab; – development of triploid apple cultivars with immunity to scab; – development of columnar apple cultivars for super-intensive orchards and main technology elements for their cultivation; – development of apple cultivars with improved biochemical composition of fruits with higher content of ascorbic acid (vitamin C) and Р-active substances (vitamin Р).…”
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