Low pilot overhead parametric channel estimation scheme for RIS-assisted mmWave MIMO systems by LI Shuangzhi, YANG Ruiqi, GUO Xin, HUANG Sai

“…Then, a non-iterative channel estimation algorithm was derived using tensor canonical polyadic decomposition with Vandermonde structure constraints. Theoretical analysis indicated that the minimum pilot overhead of the proposed scheme only depended on the product of the subchannel path numbers of the reflection links and exhibited low computational complexity. …”
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Dissipativity and Error Feedback Controller Design of Time-Delay Genetic Regulatory Networks by Yonggang Ma, Junmei Liu, Jiao Ai

“…Finally, two examples are used to illustrate the validity of the theoretical results.…”
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The analysis of the effect of piston speed on the operation of a refrigeration compressor operating in the area of wet steam by D. Kh. Sadvakasov, G. I. Chernov, V. S. Evdokimov, N. A. Raykovskiy

“…The paper presents a theoretical assessment of the effect of the piston speed on the energy efficiency of a steam compression refrigeration cycle based on compression in the area of wet steam, implemented in a low-speed refrigeration compressor stage. …”
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Analysis of Influential Factor on Drilling Rig Hydraulic Brake Disc based on Finite Element Method by Chen Bo, Li Chunfang

“…For the brake discs,reduction in its holistic temperature and stress could be achieved by increasing the convective heat transfer coefficient and the thermal conductivity,reducing the thermal expansion coefficient and the friction coefficient. A theoretical guidance for optimization design of brake disc is provided by the conclusion of simulation analysis.…”
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Channel estimation for ambient Internet of things by WANG Ruoheng, DONG Lan, LIU Ming, WANG Gongpu, AI Bo

“…The Cramér-Rao lower bound (CRLB) of channel estimation parameters was also derived to evaluate the theoretical limit of the estimation accuracy. Finally, simulation results were provided to corroborate the proposed studies.…”
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A Rotary Joint Actuating Device and Its Electrical Drive Scheme by Tian Guangjun, Gu Lina, Lü Panjie

“…Based on the motion analysis,the mathematical model of the rotary joint is established,the rotational range of the end-effector is got. Then,the theoretical output torque of the end-effector is taken as object function,the relationship between the output torque and the rotation angle is analyzed to further verify the rationality of the parameters design. …”
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Unbiased Isotonic Regression Tree for Discovering Hidden Heterogeneity in Monotonicity Constraints by Doowon Choi

“…This integration is often implemented through specific types of constraints that reflect real-world conditions or theoretical insights. Within the family of regression trees, the isotonic regression tree is used to incorporate a monotonicity constraint between a predictor and a response variable. …”
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Assessment of Digital Marketing Management in Companies by T. D. Kolodnik

“…Based on the results of the assessment of digital marketing management, it is concluded that the theoretical basis for the economic success of many companies is the professional flexibility of top management specialists and marketing departments.…”
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Interdisciplinarity: a Current Need to Improve the Teaching-Learning Process by Lizgrace Llano Arana, Miriam Gutiérrez Escobar, Addys Stable Rodríguez, María Cristina Núñez Martínez, Rosa María Masó Rivero, Bárbara Rojas Rivero

“…This paper aims to update scholars about the possibilities offered by interdisciplinarity to improve the teaching-learning process. The theoretical and methodological premises of interdisciplinarity are analyzed through a literature review. …”
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Joint estimation of interference frequency offset and time delay in PCMA system by Xue-juan WEI, Yong YANG, Yi-ming GUO, Dong-ling ZHANG

“…For cooperative received high-order modulation PCMA (paired carrier multiple access) signals,joint estima-tion of frequency offset and time delay was proposed.The sequence samples stored locally were used as auxiliary data.Estimation of frequency offset and time delay was calculated by optimizing the objective function,which was obtained from the cross-correlation computation of the auxiliary data and mixed signal,and the optimized process was accom-plished by utilizing two-dimensional search.By setting the threshold of joint estimation,the calculated amount was greatly reduced.Modified Cramer-Rao bound (MCRB) of interference frequency offset and time delay was derived,which provided theoretical basis for performance of the proposed algorithm.Simulation results show that the algorithm has similar performance with existing algorithms,but its complexity is reduced by two-thirds.…”
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Biodegradable annuloplasty rings: evolution, characteristics and surgical technique by N. V. Shatelen, A. Kalangos

“…The need for a degradable ring stems from two areas in which biodegradable ring annuloplasty can theoretically fill a void: 1 – valve repair in infected valve tissue to avoid colonization of permanent implanted ring device and infection recurrence, 2 – valve repair in children, where traditional annuloplasty rings can’t be used due to the risk of acquired stenosis for lack of growth. …”
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Dynamic Modeling and Analysis of the Email Virus Propagation by Yihong Li, Jinxiao Pan, Zhen Jin

“…Based on the above theoretical results, some effective strategies are also provided to control the propagation of the email viruses. …”
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QUALITY ASSURANCE IN HIGHER EDUCATION: UP-TO-DATE EXPERIENCE (PAPER 2) by V. I. Baidenko, N. A. Selezneva

“…The authors give their opinion that for the purposes of academic communication we need to develop a glossary completely reflecting theoretical, conceptual, methodological and practical wealth in this area. …”
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Design Analysis and Implementation of a Passive Expansion Spherical Robot by Shao Pai, Qin Jianjun, Cao Yu, Liu Xingjie, Chen Haonan

“…Mathematical models are established to perform kinematic and dynamic analysis of spherical robot mechanisms, the simulation results of rolling and obstacle crossing are compared with the theoretical values to verify the correctness of kinematics and dynamics. …”
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Design and Analysis of Electromechanical Controlled Globoidal Cam System by Ru Yan, Jujiang Cao, Yansong Liu, Jinsheng Liang

“…The research provides a theoretical basis for expanding the application field of globoidal cam mechanism， lays a foundation for the development of the intelligent globoidal cam system.…”
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Study on the Dynamics of Non-circular Planetary Gear Hydraulic Motor by Wei Shuang, Li Dianqi, Liu Guanghui

“…Taking the 6 8 elliptical planetary gear system as example,the time domain response of gear system is obtained and the influence of the backlash on the dynamic characteristic of the system is analyzed,a theoretical basis for vibration analysis of non-circular gear motor is provided.…”
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A New Quasi-Human Algorithm for Solving the Packing Problem of Unit Equilateral Triangles by Ruimin Wang, Xiaozhuo Qi, Yuqiang Luo, Jianqiang Dong

“…The packing problem of unit equilateral triangles not only has the theoretical significance but also offers broad prospects in material processing and network resource optimization. …”
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Investigation of ΔE Effect on Vibrational Behavior of Giant Magnetostrictive Transducers by M. Sheykholeslami, Y. Hojjat, M. Ghodsi, K. Kakavand, S. Cinquemani

“…This paper deals with the study of such effect from both theoretical and experimental point of view. ΔE effect on behavior of the transducer based on Terfenol-D is analytically described as a function of different operating conditions focusing on effects on resonance frequency, mode shape, and moreover experimentally the quality factor. …”
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A Submicrosecond-Response Ultrafast Microwave Ranging Method Based on Optically Generated Frequency-Modulated Pulses by Yifei Sun, Yongchao Chen, Longhuang Tang, Xing Jia, Heli Ma, Xiang Wang, Long Chen, Shenggang Liu, Tianjiong Tao, Jian Wu, Chengjun Li, Shuanyu Liu, Weilu Chen, Wei Gu, Jia Shi, Jidong Weng

“…An ultrafast microwave ranging method based on optically generated frequency-modulated microwave pulses is proposed in this study. The theoretical analysis demonstrated that nanosecond-scale linear frequency modulation microwave pulse can be obtained by femtosecond laser interference under the condition of unbalanced dispersion, which can be used to achieve a high temporal resolution of the displacement change in the measurement by the principle of frequency modulation continuous wave (FMCW) radar. …”
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Per‐unit transformation for the combined analysis of multi‐energy integration by Zhang Zhang, Fei Wang, Hui Fan

“…The proposed method's theoretical proofs demonstrate its ability to preserve structure and reduce complexity. …”
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