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Wideband spectrum sensing using step-sampling based on the multipath nyquist folding receiver

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Defence Technology（防务技术） 2024年第1期31卷 523-536页

作者： kai-lun Tian kai-li Jiang Sen cao Jian Gao Ying Xiong Bin Tang Xu-ying Zhang Yan-fei Li University of Electronic Sc.ence and Technology of china Chengdu611731China china Electronics Technology Group corporation 29th Research Institute Chengdu610036China

Wideband spectrum sensing with a high-speed analog-digital converter(ADc) presents a challenge for practical *** Nyquist folding receiver(NYFR) is a promising scheme for achieving cost-effective real-time spectrum sensing,which is subject to the complexity of processing the modulated *** this case,a multipath NYFR architecture with a step-sampling rate for the different paths is *** different numbers of digital channels for each path are designed based on the chinese remainder theorem(cRT).Then,the detectable frequency range is divided into multiple frequency grids,and the Nyquist zone(NZ) of the input can be obtained by sensing these ***,high-precision parameter estimation is performed by utilizing the NYFR *** with the existing methods,the scheme proposed in this paper overcomes the challenge of NZ estimation,information damage,many computations,low accuracy,and high false alarm *** simulation experiments verify the effectiveness of the proposed architecture in this paper.

关键词： Wideband spectrum sensing Sub-Nyquist sampling Step-sampling Nyquist folding receiver(NYFR) Multisignal processing

The OscLV2s-OscRN1 co-receptor regulates grain shape in rice

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Journal of Genetics and Genomics 2024年第7期51卷 691-702页

作者： Xingxing Li Meng-en Wu Junc.eng Zhang Jingyue Xu Yuanfei Diao Yibo Li National Key Laboratory of crop Genetic Improvement and National centre of Plant Gene Research(Wuhan) Huazhong Agricultural UniversityWuhanHubei 430070China Hubei Hongshan Laboratory WuhanHubei 430070China

The highly conserved cLV–WUS negative feedback pathway plays a decisive role in regulating stem cell maintenance in shoot and floral meristems in higher plants,including Arabidopsis,rice,maize,and ***,we find significant natural variations in the OscLV2c,OscLV2d,and OscRN1 loci in a genome-wide association study of grain shape in ***2a,OscLV2c,OscLV2d,and OscRN1 negatively regulate grain length–width ratio and show distinctive geographical distribution,indica–japonica differentiation,and artificial selection ***,OscLV2a and OscRN1 interact biochemically and genetically,suggesting that the two components function in a complex to regulate grain shape of ***,the genetic contributions of the haplotypes combining OscLV2a,OscLV2c,and OscRN1 are significantly higher than those of each single gene alone in controlling key yield *** findings identify two groups of receptor-like kinases that may function as distinct co-receptors to control grain size in rice,thereby revealing a previously unrecognized role of the cLV class genes in regulating seed development and proposing a framework to understand the molecular mechanisms of the cLV–WUS pathway in rice and other crops.

关键词： Rice Grain shape OscLV2s OscRN1 Natural variations Indica-japonica differentiation

Quantifying the strength of magnetic fields using baryon electric charge correlation

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Nuclear Sc.ence and Techniques 2024年第8期35卷 5-8页

作者： Xu‑Guang huang Physics Department and center for Particle Physics and Field Theory Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Physics and Ion‑beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research center for Theoretical Nuclear Physics National Natural Science Foundation of China and Fudan UniversityShanghai 200438China

Although heavy-ion collisions generate strong magnetic fields,their direct measurement is a challenging task.A new observable,the baryon electric charge correlation,was recently found to be sensitive to the magnetic field strength and thus could be used as a magnetometer for heavy-ion ***,this observable may shed light on the equation of state and phase structure of quantum chromodynamics(QcD)under magnetic *** and understanding the phase structure of quantum chromodynamics(QcD)is important in contemporary physics[1].

关键词： charge observable magnetic

USP45 acts as an oncogene to regulate the proliferation of esophageal cancer cells

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Genes & Diseases 2024年第5期11卷 44-47页

作者： kai Li Qian Wang Hua Bian Zhang Zhongjing college of chinese Medicine Henan Key Laboratory of Zhang Zhongjing Formulae and Herbs for ImmunoregulationNanyang Institute of TechnologyNanyangHenan 473004China college of Orthopaedics and Traumatology Henan University of Chinese MedicineZhengzhouHenan 450046China

Deubiquitinases(DUBs)are a class of enzymes that are able to reverse the process of ubiquitination.1 Extensive research has revealed that there are more than 100 DUBs found in humans,which are classified into seven main families:ubiquitin-specific proteases(USPs),ubiquitin carboxyl-terminal hydrolases,the Machado-Joseph disease domain superfamily,the otubain/ovarian tumor-domain containing proteins,the ZUFSP(Zinc finger with UFM1-specific peptidase domain protein)family,the JAB1/MPN/MOV34 proteases,and the novel motif interacting with ubiquitin-containing DUB *** DUBs are cysteine proteases,except the JAB1/MPN/MOV34 proteases,which are Zn^(2+) metalloproteases.

关键词： esophageal cancer Zinc

Risk stratification for radioactive iodine refractoriness using molecular alterations in distant metastatic differentiated thyroid cancer

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chinese Journal of cancer Research 2024年第1期36卷 25-35页

作者： Zhuanzhuan Mu Xin Zhang Dongquan Liang Jugao Fang Ge c.en Wenting Guo Di Sun Yuqing Sun Zhentian kai Lisha huang Jun Liang Yansong Lin Department of Nuclear Medicine State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College(PUMC)HospitalChinese Academy of Medical Sciences&PUMCBeijing 100730China Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear Medicine Beijing 100730China Pepperdine University Graduate School of Education and Psychology Los Angeles 90045USA Department of Head and Neck Surgery Affiliated Beijing Tongren HospitalCapital Medical UniversityBeijing 100730China Department of General Surgery State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College(PUMC)HospitalChinese Academy of Medical Sciences&PUMCBeijing 100730China central Laboratory State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College(PUMC)HospitalChinese Academy of Medical Sciences&PUMCBeijing 100730China Department of Bioinformatics Zhejiang Shaoxing Topgen Biomedical Technology Co.LtdShanghai 201321China Department of Medicine Zhejiang Shaoxing Topgen Biomedical Technology Co.LtdShanghai 201321China Department of Oncology Peking University International HospitalBeijing 102206China

Objective: Patients with radioactive iodine-refractory differentiated thyroid cancer(RAIR-DTc) are often diagnosed with delay and constrained to limited treatment options. The correlation between RAI refractoriness and the underlying genetic characteristics has not been extensively ***: Adult patients with distant metastatic DTc were enrolled and assigned to undergo next-generation sequencing of a customized 26-gene panel(Thyro Lead). Patients were classified into RAIR-DTc or non-RAIR groups to determine the differences in clinicopathological and molecular characteristics. Molecular risk stratification(MRS) was constructed based on the association between molecular alterations identified and RAI refractoriness, and the results were classified as high, intermediate or low ***: A total of 220 patients with distant metastases were included, 63.2% of whom were identified as RAIRDTc. Genetic alterations were identified in 90% of all the patients, with BRAF(59.7% vs. 17.3%), TERT promoter(43.9% vs. 7.4%), and TP53 mutations(11.5% vs. 3.7%) being more prevalent in the RAIR-DTc group than in the non-RAIR group, except for RET fusions(15.8% vs. 39.5%), which had the opposite pattern. BRAF and TERT promoter are independent predictors of RAIR-DTc, accounting for 67.6% of patients with RAIR-DTc. MRS was strongly associated with RAI refractoriness(Pconfidence interval(95% cI), 3.96-14.28;PcI,1.01-10.14;P=0.041).conclusions: Molecular alterations were associated with RAI refractoriness, with BRAF and TERT promoter mutations being the predominant contributors, followed by TP53 and DIcER1 mutations. MRS might serve as a valuable tool for both prognosticating clinical outcomes and directing precision-based therapeutic interventions.

关键词： Differentiated thyroid cancer distant metastases genetic alterations RAI refractoriness molecular risk stratification

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chinese Journal of Electronics 2024年第3期33卷 672-682页

作者： Yi ZHANG kai ZHANG Ting cUI PLA SSF Information engineering University

Related-key model is a favourable approach to improve attacks on block ciphers with a simple key ***,to the best of our knowledge,there are a few results in which zero-correlation linear attacks take advantage of the related-key *** ascribe this phenomenon to the lack of consideration of the key input in zerocorrelation linear *** on the linear key schedule of a block cipher,we generalize the zero-correlation linear attack by using a related-key ***,we propose the creation of generalized linear hulls(GLHs)when the key input is involved;moreover,we indicate the links between GLHs and conventional linear hulls(cLHs).Then,we prove that the existence of zero-correlation GLHs is completely determined by the corresponding cLHs and the linear key *** addition,we introduce a method to construct zero-correlation GLHs by cLHs and transform them into an integral *** correctness is verified by applying it to SIMON16/16,a SIMON-like toy *** on our method,we find 12/13/14/15/15/17/20/22-round related-key zero-correlation linear distinguishers of SIMON32/64,SIMON48/72,SIMON48/96,SIMON64/96,SIMON64/128,SIMON96/144,SIMON128/192 and SIMON 128/256,*** far as we know,these distinguishers are one,two,or three rounds longer than current best zero-correlation linear distinguishers of SIMON.

关键词： Schedules ciphers Analytical models Toy manufacturing industry Force Linear approximation Transforms

Reaction Mechanism of Actin ATP Hydrolysis Studied by QM/MM calculations

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cHEMIcAL RESEARcH IN cHINESE UNIVERSITIES 2024年第5期40卷 849-855页

作者： Wang, Yiwen Lin, Lirui Xu, Li-Yan Li, en-Min Dong, Geng Shantou Univ Med coll Dept Biochem & Mol Biol Shantou 515041 Peoples R China Shantou Univ Med coll Guangdong Higher Educ Inst Key Lab Mol Biol High Canc Incidence Coastal Area Shantou 515041 Peoples R China Shantou Univ Med coll Med Informat Res Ctr Shantou 515041 Peoples R China Shantou Univ Med coll Guangdong Prov Key Lab Infect Dis & Mol Immunopath Shantou 515041 Peoples R China Shantou Univ Med coll Dept Bioinformat Shantou 515041 Peoples R China Shantou Univ Med coll Canc Res Ctr Shantou 515041 Peoples R China

Actin fibers are an important part of the cytoskeleton, providing vital support for the plasma membrane. This function is driven by its ATPase (ATP: adenosine triphosphate) activity, i.e., ATP+H2O -> ADP+Pi. This seemingly simple reaction has attracted much attention because the hydrolysis of ATP provides energy to support life processes. However, the reaction mechanism of ATP hydrolysis in actin is not clear. In order to gain deep insights into the functions of actin, it is essential to elucidate the reaction mechanism of the actin ATP hydrolysis. In this paper, we have studied the reaction mechanism of the ATP hydrolysis in actin by the combined quantum mechanical and molecular mechanics (QM/MM) calculations. Our results show that 1) bond cleavage of the P gamma-OS of ATP and bond formation between oxygen of the lytic water and P gamma atoms take place simultaneously, and this is the rate-limiting step of the hydrolysis; 2) the proton on the lytic water transfers to the phosphate to form H2P gamma O4-via one bridge water. The energy barrier of the complete reaction is 17.6 kcal/mol (1 kcal=4.184 kJ), which is in high agreement with the experimental value.

关键词： Actin Adenosine triphosphate (ATP) hydrolysis Quantum mechanical and molecular mechanics (QM/MM) Reaction mechanism MOLEcULAR-DYNAMIcS SIMULATIONS APPROXIMATION QUANTUM

Discrete Boltzmann model with split collision for nonequilibrium reactive flows

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communications in Theoretical Physics 2024年第8期76卷 164-186页

作者： chuandong Lin kai H Luo Huilin Lai Sino-French Institute of Nuclear engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Key Laboratory for Thermal Sc.ence and Power engineering of Ministry of Education Department of Energy and Power EngineeringTsinghua UniversityBeijing 100084China Department of Mechanical engineering National University of Singapore10 Kent Ridge Crescent119260Singapore Department of Mechanical engineering University College LondonTorrington PlaceLondon WC1E 7JEUnited Kingdom School of Mathematics and Statistics Key Laboratory of Analytical Mathematics and Applications(Ministry of Education)Fujian Key Laboratory of Analytical Mathematics and Applications(FJKLAMA)Center for Applied Mathematics of Fujian Province(FJNU)Fujian Normal University350117 FuzhouChina

A multi-relaxation-time discrete Boltzmann model(DBM) with split collision is proposed for both subsonic and supersonic compressible reacting flows, where chemical reactions take place among various components. The physical model is based on a unified set of discrete Boltzmann equations that describes the evolution of each chemical species with adjustable acceleration, specific heat ratio, and Prandtl number. On the right-hand side of discrete Boltzmann equations, the collision,force, and reaction terms denote the change rates of distribution functions due to self-and crosscollisions, external forces, and chemical reactions, respectively. The source terms can be calculated in three ways, among which the matrix inversion method possesses the highest physical accuracy and computational effic.ency. Through chapman-enskog analysis, it is proved that the DBM is consistent with the reactive Navier-Stokes equations, Fick's law and the Stefan-Maxwell diffusion equation in the hydrodynamic limit. compared with the one-step-relaxation model, the split collision model offers a detailed and precise description of hydrodynamic, thermodynamic, and chemical nonequilibrium effects. Finally, the model is validated by six benchmarks, including multicomponent diffusion, mixture in the force field, Kelvin-Helmholtz instability, flame at constant pressure, opposing chemical reaction, and steady detonation.

关键词： discrete Boltzmann method reactive flow detonation nonequilibrium effect

Information conductivity:Universal Performance Measure for Semantic communications

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china communications 2024年第7期21卷 17-36页

作者： Liang Zijian Niu kai Zhang Ping Key Laboratory of Universal Wireless communications Ministry of Education(Beijing University of Posts and Telecommunications)Beijing 100876China Peng c.eng Laboratory Shenzhen 518055China State Key Laboratory of Networking and Switching Technology(Beijing University of Posts and Telecommunications) Beijing 100876China

As a novel paradigm,semantic communication provides an effective solution for breaking through the future development dilemma of classical communication ***,it remains an unsolved problem of how to measure the information transmission capability for a given semantic communication method and subsequently compare it with the classical communication *** this paper,we first present a review of the semantic communication system,including its system model and the two typical coding and transmission methods for its *** address the unsolved issue of the information transmission capability measure for semantic communication methods,we propose a new universal performance measure called Information *** provide the definition and the physical significance to state its effectiveness in representing the information transmission capabilities of the semantic communication systems and present elaborations including its measure methods,degrees of freedom,and progressive *** results in image transmission scenarios validate its practical applicability.

关键词： information conductivity information transmission capability semantic communications system model universal performance measure