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Automatic modulation recognition of radio fuzes using a Dr2D-based adaptive denoising method and textural feature extraction

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Defence Technology（防务技术） 2024年第4期34卷 328-338页

作者： Yangtian Liu Xiaopeng Yan Qiang Liu tai An Jian Dai Science and Technology on Electromechanical Dynamic Control Laboratory School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China China research and Development Academy of machinery Equipment Beijing 100089China

The identification of intercepted radio fuze modulation types is a prerequisite for decision-making in interference ***,the electromagnetic environment of modern battlefields is complex,and the signal-to-noise ratio(SNr)of such environments is usually low,which makes it difficult to implement accurate recognition of radio *** solve the above problem,a radio fuze automatic modulation recognition(Amr)method for low-SNr environments is ***,an adaptive denoising algorithm based on data rearrangement and the two-dimensional(2D)fast Fourier transform(FFT)(Dr2D)is used to reduce the noise of the intercepted radio fuze intermediate frequency(IF)***,the textural features of the denoised IF signal rearranged data matrix are extracted from the statistical indicator vectors of gray-level cooccurrence matrices(GLCms),and support vector machines(SVms)are used for *** Dr2D-based adaptive denoising algorithm achieves an average correlation coefficient of more than 0.76 for ten fuze types under SNrs of-10 d B and above,which is higher than that of other typical *** trained SVm classification model achieves an average recognition accuracy of more than 96%on seven modulation types and recognition accuracies of more than 94%on each modulation type under SNrs of-12 d B and above,which represents a good Amr performance of radio fuzes under low SNrs.

关键词： Automatic modulation recognition Adaptive denoising Data rearrangement and the 2D FFT(Dr2D) radio fuze

0^(--) hidden-heavy tetraquark states via QCD sum rules

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Chinese Physics C 2024年第9期48卷 50-59页

作者： Bing-Dong Wan Hong-tai Xu Department of Physics Liaoning Normal UniversityDalian 116029China Center for Theoretical and Experimental High Energy Physics Liaoning Normal UniversityDalian 116029China

In this study,we evaluated the mass spectra of the prospective 0^(--) hidden-charm and hidden-bottom tetraquark states in molecular configuration via QCD sum *** our calculation,the nonperturbative condensate contributions are considered up to dimension eight in operator product *** is found that there could exist 4possible 0^(--) hidden-charm tetraquark states with masses(4.68±0.07),(4.22±0.09),(4.53±0.09),and(4.26±0.13) *** corresponding hidden-bottom partners are found lying at(11.04±0.10),(10.71±0.12),(11.09±0.10),and(11.82±0.14) GeV,*** possible tetraquark decay modes were analyzed,which are expected to be measured in BESⅢ,BELLEⅡ,and LHCb experiments.

关键词： exotic hadronic states QCD sum rules tetraquarks

Enhancement of heavy metals desorption from the soil by eddy deep leaching in hydrocyclone

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Journal of Environmental Sciences 2024年第1期135卷 242-251页

作者： Ning Wang Hao Lu Bo Liu tai Xiong Jianping Li Hualin Wang Qiang Yang School of mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China National Engineering Laboratory for High Concentration refractory Organic Wastewater Treatment Technology East China University of Science and TechnologyShanghai 200237China

An eddy deep leaching technology was developed in this paper to address the challenge of treating heavy metal contaminants in industrial mining *** desorption effect of As,Cd,Sb and Pb was investigated utilizing chemical leaching and physical eddy *** was found that the heavy metals concentration increased with decreasing particle *** highest proportion of Cd in the form distribution of soil was in the bound to iron and manganese oxides,while the maximum proportion of As,Sb and Pb were in the *** optimal solid-liquid ratio of the hydrocyclone was 1:20,and the corresponding separation efficiency and flow rate were 84.7%and 1.76 m^(3)/hr,*** grade efficiency of soil particle separation increases with particle size and exceeds 99%for particles above 1,000μ*** experiments have revealed that oxalic acid(OA)and a combination of oxalic acid and EDTA(OAPE)were more efficient than citric acid(CA)and a combination of citric acid and EDTA(CAPE)for the desorption of heavy metals,*** comparison of OAPE and eddy leaching found that the latter improved the desorption efficiency by 9.4%,7.5%,7.2%and 7.8%for As,Cd,Sb and Pb compared to the former,*** results demonstrated that the eddy leaching technique could further enhance the desorption efficiency of heavy *** is expected to provide technical support for soil remediation with reduced usage of leaching agents.

关键词： Heavy metals Soil remediation Oxalic acid Eddy leaching Hydrocyclone

Bilayer Compounded Polytetrafluoroethylene membrane for Enhanced Oil-Water Emulsion Separation

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Chinese Journal of Polymer Science 2024年第6期42卷 838-850页

作者： Yu-Liang Yang tai-ran Zhang Yan-Ting Han Shao-Yun Guo Qin-Gong rong Jia-Bin Shen State Key Laboratory of Polymer materials Engineering Polymer Research Institute of Sichuan UniversitySichuan Provincial Engineering Laboratory of Plastic/Rubber Complex Processing TechnologyChengdu610065China West China Hospital/West China School of Nursing Sichuan UniversityChengdu610041China Shandong Senrong New materials Co. Ltd.Zibo256401China

In order to achieve efficient and durable oil-water emulsion separation,the membranes possessing high separation efficiency and mechanical strength attract extensive attention and are in great *** present study,a kind of polytetrafluoroethylene(PTFE)-based bilayer membrane was fabricated by electrospinning fibrous PTFE(fPTFE)on an expanded PTFE(ePTFE)*** morphological observation revealed that the fibrous structure of the fPTFE layer could be tailored by controlling the formulation of spinning *** addition of appropriate polyoxyethylene(PEO)would make the fibers in the fPTFE layer finer and more *** a result,the compounded membrane exhibited a small pore size of approximately 1.25µm and a substantial porosity nearing 80%.This led to super-hydrophobicity,characterized by a high water contact angle(WCA)of 149.8°,and facilitated rapid oil *** water-in-oil emulsion separation experiment further confirmed that the compounded membrane not only had a high separation efficiency closing 100%,but such an outstanding separation capacity could be largely retained,either through multiple cycles of use or through strong acid(pH=1),strong alkali(pH=12),or high-temperature(100°C)***,the mechanical behavior of the bilayer membrane was basically contributed by that of each layer in terms of their volume *** significantly,the poor creep resistance of fPTFE layer was suppressed by compounding with ePTFE ***,this study has laid the groundwork for a novel approach to create PTFE-based compounded membranes with exceptional overall characteristics,showing promise for applications in the realm of emulsion separation.

关键词： ePTFE Electrospinning membrane Bilayer compounding Emulsion separation

Top-quark rare decays with flavor violation

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Chinese Physics C 2024年第9期48卷 68-81页

作者： ming-Yue Liu Shu-min Zhao Song Gao Xing-Yu Han tai-Fu Feng Department of Physics Hebei UniversityBaoding 071002China Hebei Key Laboratory of High-precision Computation and Application of Quantum Field Theory Baoding 071002China Hebei research Center of the Basic Discipline for Computational Physics Baoding 071002China Department of Physics Chongqing UniversityChongqing 401331China

In the present study,we investigated the decays of the top quark:t→cy,t→cg,t→cZ,and t→*** are extremely rare processes in the standard model(Sm).As the U(1)extension of the minimal supersymmetric standard model(mSSm),the U(1)_X SSm features new superfields such as the right-handed neutrinos and three Higgs *** analyzed the effects of different sensitive parameters on the results and made reasonable theoretical predictions,thereby providing a useful reference for future experimental *** the constraint set by the updated experimental data,the numerical results show that the branching ratios of the four proccsscs,i.e.,t→cγ,cg,cZ,ch,can reach the same order of magnitude as their experimental upper *** them,tanβhas the most evident effect on these processes and is the main parameter;g_(X),g_(YX),μ,m_(2),λ_(H),m_(U23)^(2),and m_(Q23)^(2) are also important parameters for the processes,and have effects on the numerical results.

关键词： Top quark flavor violation U(1)_(X)SSm new physics

Evolution and function of residual solvent in polymer-Li_2B_(12)H_(12) composite solid electrolyte

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rare metals 2024年第8期43卷 3748-3757页

作者： Xiang-Yang Ye Ke-Pan Bao Sai-Nan Luo Xin Li tai-Qiang Chen Shui-Xin Xia Tao Yuan Yue-Peng Pang Shi-You Zheng School of materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China Department of materials Science and Engineering National University of SingaporeSingapore 119077Singapore

Composite solid electrolytes(CSEs) containing polymer matrices and inorganic fillers hold promise for the next generation of solid-state ***,the role of residual solvents in CSEs remains *** study investigated the evolution and function of the residual solvent in a polymer-Li_2B_(12)H_(12) CSE.A partial reaction occurred between Li_2B_(12)H_(12) and solvent N,N-dimethylformamide(DmF),which produced dimethylaminomethanol(DmAm) in the *** functional theory calculations have revealed that DmA m forms stronger hydrogen bonds with polyvinylidene fluoride chains than DmF,which can have a plasticizing effect on the polymer matrix,leading to lower crystallinity and quicker segment ***,this CSE exhibited improved Li-ion conducting properties,enabling the stable cycling of Li‖LiFePO_(4) solid-state *** study provided insights into the role of residual solvents in CSEs.

关键词： Composite solid electrolyte residual solvent Lithium borohydride Plasticizing effect

The germline genetics of mild-to-moderate penetrance:An intriguing role of PrAmE in multiple carcinogenesis

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Genes & Diseases 2024年第3期11卷 7-10页

作者： Diaddin Hamdan Van tai Nguyen Justine Paris Christophe Leboeuf morad El Bouchtaoui marc Espie Anne Janin Geraldine Falgarone melanie Di Benedetto Guithem Bousquet Universite de Paris Cite INSERMUMR_S942MASCOTParis F-75006France Hopital La Porte Verte Versailles F-78004France National Cancer Hospital Cancer Research and Clinical Trials CenterHaNoi100000VietNam AP-HP-Hopital Saint Louis Centre de Maladies du SeinParisF-75010France Universite Sorbonne Paris Nord Bobigny F-93000France AP-HP-Hopital Avicenne Unite de Medecine AmbulatoireBobigny F-93000France

Germline genetics of high penetrance such as BrCA genes,mutations might be sufficient for carcinogenesis,but this only explains fewer than 10%of *** assume that most cancers are the result of germline mutations of low to moderate penetrance,combined with acquired mutations due to external carcinogenic *** their accumulation over time,aging is associated with an increased risk of multiple cancer development in a given *** decades,germline genetics have been based on familial linkage studies enabling most high-penetrance genes to be *** recently,population-wide studies have led to the identification of considerable numbers of polymorphisms associated with cancer ***,most of them are of unknown functional value,thus limiting their translational application.

关键词： carcinogenesis BrCA linkage

roles of concentration-dependent Cu doping behaviors on the thermoelectric properties of n-type mg_(3)Sb_(1.5)Bi_(0.5)

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Journal of materiomics 2024年第1期10卷 154-162页

作者： Xinxin Yang Heng Ni Xiaotong Yu Biao Cao Juanjuan Xing Qiyong Chen Lili Xi Jiandang Liu Jiye Zhang Kai Guo Jing-tai Zhao School of materials Science and Engineering Shanghai University99 Shangda RoadShanghai200444China materials Genome Institute Shanghai University99 Shangda RoadShanghai200444China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefeiAnhui230026China School of Physics and materials Science Guangzhou UniversityGuangzhou510006China research Center for Advanced Information materials(CAIm) Huangpu Research&Graduate School of Guangzhou UniversitySino-Singapore Guangzhou Knowledge CityHuangpu DistrictGuangzhou510555China Key Lab of Si-based Information materials&Devices and Integrated Circuits Design Department of Education of Guangdong ProvinceChina School of materials Science and Engineering Guilin University of Electronic TechnologyGuilin541004China Guangxi Key Laboratory of Information materials Guilin University of Electronic TechnologyGuilin541004China

Large Seebeck coefficients induced by high degeneracy of conduction band minimum,and low intrinsic lattice thermal conductivity originated from large lattice vibrational anharmonicity render mg_(3)Sb_(2)as a promising n-type thermoelectric ***,we demonstrated unique concentration-dependent occupation behaviors of Cu in mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)matrix,evidenced by structural characterization and transport property *** is found that Cu atoms prefer to enter the interstitial lattice sites in mg_(3)Sb_(2)host with low doping level(mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+x%Cu,xrs for providing additional electrons without deteriorating the carrier *** x is larger than 0.3%,the excessive Cu atoms are inclined to substitute mg atoms,yielding acceptors to decrease the electron *** a result,the electrical conductivity of the mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample reaches 2.3×10^(4)S/m at 300 K,increasing by 300%compared with that of the pristine *** figure of merit zT values in the whole measured temperature range are significantly improved by the synergetic improvement of power factor and reduction of thermal *** average zT∼1.07 from 323 K to 773 K has been achieved for the mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01)+0.3%Cu sample,which is about 30%higher than that of the mg_(3.4)Sb_(1.5)Bi_(0.49)Te_(0.01) sample.

关键词： mg_(3)Sb_(2) Cu doping Concentration-dependent occupation Thermoelectric properties Average zT

regioselective cation exchange reaction for photoelectrochemical water splitting

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rare metals 2024年第7期43卷 3400-3407页

作者： mo-Yan Chen tai-Song Zhang Zhi Yan Jiang-Nan Lv Xiao-Ting Sun rui-Xia Yang mark TSwihart Xiao-Hong Xu Yang Liu research Institute of materials Science of Shanxi Normal University&Key Laboratory of magnetic molecules and magnetic Information materials of ministry of Education Taiyuan 030031China Department of Chemical and Biological Engineering University at Buffalo(SUNY)NY 14260USA Department of materials Science Fudan UniversityShanghai 200433China

Engineering copper sulfide-based heterostructures via cation exchange(CE)is an appealing approach,as it allows selective combination of distinct compositions and functions of metal *** heterostructures can play a significant role in photoelectrochemical applications,but the effect of the ratio between two or more domains in such heterostructures on the photoresponse has not been well explored.

关键词： exchange sulfide splitting