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25801
Application of reconfigurable intelligent surface in beamforming and information modulation
Published 2021-09-01“…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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25802
The Importance of Being Uncertain―or What I Learned From Writing History With Rumors
Published 2021-01-01“…In the end, rumors became collective stories that help us, as historians, to understand the ambiguous character of uncertainty that can both challenge and stabilize power structures. In that, the focus on rumors also allows us to embrace uncertainty, fuzziness and speechlessness as constitutive elements in our own writing.…”
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25803
Systematic Design of Parallel-connected Planetary Gear Mechanism of Nine-speed Automatic Transmission for Automobile
Published 2017-01-01“…By using this method,the numbers of the combination of the structural synthesis can be decreased and the clutching sequences synthesis efficiency will be increased effectively.By using this method,the optimized selection of nine-speed parallel-connected planetary gear mechanisms automatic transmission is realized and four feasible schemes are obtained.…”
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25804
Septo-Optic Dysplasia Diagnosed in a Newborn Infant with Normoglycemia: The Importance of Thorough Physical Examination
Published 2021-01-01“…Ultrasound imaging confirmed the presence of both gonads in the inguinal canal, with no Müllerian structures visualized. Laboratory examination revealed an undetectable random plasma cortisol level; subsequent ACTH stimulation testing confirmed adrenal insufficiency. …”
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25805
Late-Age Properties of Concrete with Different Binders Cured under 45°C at Early Ages
Published 2017-01-01“…The internal temperature of concrete structures at early ages is not so high as 60°C in many circumstances. …”
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25806
中国科技核心期刊中文核心期刊要目总览中国科学引文数据库来源期刊《建筑钢结构进展》(双月刊,CN31-1893/TU)
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25807
„Tabula Rasa”. O medium i pamięci w odniesieniu do twórczości Sarah Charlesworth i pism Rosalind E. Krauss
Published 2025-02-01“…The serigraphs by Charlesworth, who is associated with the Pictures Generation movement, challenge the semiotic interpretation of images as carriers of ideological messages or allegorical structures, a perspective commonly held by critics from the Pictures circle. …”
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25808
The impact of teacher support on OLE in RFL learners: The chain mediating roles of classroom enjoyment and motivation
Published 2025-02-01“…It also examines the mediating roles of classroom enjoyment and motivation between teacher support and OLE. A structured survey was administered to students from Hefei University of Technology, Shanghai International Studies University, and Southwest University of Science and Technology, measuring teacher support, motivation, classroom enjoyment, and OLE in online Russian classes. …”
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25809
ELEMENTS D’ORGANISATION DE L’ESPACE DU SUD DE LA BUCOVINE
Published 2014-06-01“…As a general conclusion, it appears that the south-Bucovina area has a relatively complex structure despite a kind of cultural uniformity, a historical past that stamped its mark on space organisation. …”
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25810
SDN based e-mail repudiation source restraining method
Published 2016-09-01“…With the limitation of controllability of the existing Internet architecture,the existing secure e-mail technology such as certified e-mail can only post detection but cannot source restraining on e-mail repudiation.Based on the idea of control and data separation of software-defined networking technology,by means of bypass attaching customized repudiation restrain unit to the traditional e-mail model.An e-mail repudiation source restraining method was proposed without destroying the existing e-mail structure.After presenting e-mail evidence binding protocol,repudiation behavior detection algorithm,certified reputation evaluation model,and repudiation restraining strategy formation algorithm embedded in repudiation restrain unit,the effectiveness were tested of the proposed method in 4 cross scenarios.The experimental results show that,under the premise of compatibility with the current e-mail system,the method can source restrain e-mail repudiation effectively.…”
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25811
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25812
Modélisation des savoirs dans la classe en didactique de la physique
Published 2017-06-01“…Two types of tools are proposed: one, at the mesoscopic level, allows to structure a series of sessions of a teaching sequence; the other, at the microscopic level, allows to analyze the pieces of knowledge at stake in the classroom discourses. …”
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25813
Interim results on concession agreements for the city of Perm and the Perm region
Published 2023-05-01“…Despite the fact that all agreements are closely monitored by various structures, the economic or social effect does not always manifest. …”
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25814
A Model Study on the Possible Effects of an External Electrical Field on Enzymes Having Dinuclear Iron Cluster [2Fe-2S]
Published 2012-01-01“…The PM3 type semiempirical calculations have been performed for the geometry optimization of the model structure in the absence and presence of the external field. …”
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25815
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25816
Le maire et la mosquée. Islam et laïcité en Île de France
Published 2009-11-01“…The building or renovation of mosques or religious prayer rooms has become central in structuring the relationship between mayors and fellow Muslim citizens. …”
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25817
Neural network decoding of the block Markov superposition transmission
Published 2020-09-01“…A neural network (NN)-based decoding algorithm of block Markov superposition transmission (BMST) was researched.The decoders of the basic code with different network structures and representations of training data were implemented using NN.Integrating the NN-based decoder of the basic code in an iterative manner,a sliding window decoding algorithm was presented.To analyze the bit error rate (BER) performance,the genie-aided (GA) lower bounds were presented.The NN-based decoding algorithm of the BMST provides a possible way to apply NN to decode long codes.That means the part of the conventional decoder could be replaced by the NN.Numerical results show that the NN-based decoder of basic code can achieve the BER performance of the maximum likelihood (ML) decoder.For the BMST codes,BER performance of the NN-based decoding algorithm matches well with the GA lower bound and exhibits an extra coding gain.…”
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25818
Relationship between correlation immune and weight of H Boolean functions
Published 2012-02-01“…The Boolean function derivative and e-derivative which together with the derivative so that the weight of Boolean functions can be directly clear characterized and defined as the tools for research and deep into the internal structure of Boolean function value,to discuss a large range in which the H-Boolean functions exist,the issue of whether all different weights of first-order and m-order H Boolean functions exist.For H Boolean functions with m-order correlation immunity,the relationship between its correlation immune order m and dimension n,and the maximum problem of m.Gives the m-order correlation immune H Boolean function exists only in the H Boolean function that with two kinds of weight.The maximum value of correlation immune m is n-2,and the rest of the weight of H Boolean function does not exist above the second-order (including the second-order) correlation immune fuction and a series of results.…”
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25819
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25820
Accumulare afflizione. Il tempo, la testimonianza e l’indicibile
Published 2024-12-01“…Through the story of a refugee woman, this article reflects on the interplay between the memory of violence, the structures of time, and the poetics of the expressible and the reticence. …”
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