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Research on Voiceprint Recognition of Camouflage Voice Based on Deep Belief Network

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International Journal of Automation and computing 2021年第6期18卷 947-962页

作者： Nan Jiang Ting Liu college of Public Security Information Technology and Intelligence Criminal Investigation Police University of ChinaShenyang 110854China college of Light Industry Liaoning UniversityShenyang 110036China

The problem of disguised voice recognition based on deep belief networks is studied. A hybrid feature extraction algorithm based on formants, Gammatone frequency cepstrum coefficients(GFCC) and their different coefficients is proposed to extract more discriminative speaker features from the original voice data. Using mixed features as the input of the model, a masquerade voice library is constructed. A masquerade voice recognition model based on a depth belief network is proposed. A dropout strategy is introduced to prevent overfitting, which effectively solves the problems of traditional Gaussian mixture models, such as insufficient modeling ability and low discrimination. Experimental results show that the proposed disguised voice recognition method can better fit the feature distribution, and significantly improve the classification effect and recognition rate.

关键词： Disguised voice recognition deep belief network feature extraction Gammatone frequency cepstrum coefficients(GFCC) dropout

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Ru/NiMnB spherical cluster pillar for highly proficient green hydrogen electrocatalyst at high current density

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Journal of Energy Chemistry 2025年第1期100卷 397-408页

作者： Md Ahasan Habib Shusen Lin Mehedi Hasan Joni Sumiya Akter Dristy Rutuja Mandavkar Jae-Hun Jeong Jihoon Lee Department of Electronic Engineering College of Electronics and Information Kwangwoon University

Advanced OER/HER electrocatalytic alternatives are crucial for the wide adaptation of green hydrogen ***,Ru/NiMnB spherical cluster pillar （SCP）,denoted as Ru/NiMnB,is synthesized using a combination of electro-deposition and hydrothermal *** investigation of Ru doping in the NiMnB matrix revealed significant improvements in electrocatalytic *** Ru/NiMnB SCPs demonstrate superior OER/HER activity with low overpotentials of 150 and 103 mV at 50mA/cm2in 1 M KOH,making them highly competitive with state-of-the-art ***,the Ru/NiMnB SCPs exhibit a low 2-E cell voltage of 2.80 V at ultra-high current density of 2,000 m A/cm2in 1 M KOH,outperforming the standard benchmark electrodes of RuO2||Pt/C,thereby positioning Ru/NiMnB as one of the best bifunctional *** SCPs exhibit exceptional high-current characteristics,stability and corrosion resistance,as evidenced by continuous operation at 1,000 mA/cm2high-current density for over 150 h in 6 M KOH at elevated temperatures under harsh industrial *** a small amount of Ru incorporation significantly enhances the electrocatalytic performances of NiMnB,attributed to increased active sites and improved intrinsic properties such as conductivity,adsorption/desorption capability and reaction ***,Ru/NiMnB SCPs present a promising bi-functional electrode concept for efficient green H2production.

关键词： Advanced electrocatalyst High current Corrosion resistance Industrial requirement

Robust adaptive backstepping control for a class of uncertain nonlinear systems based on disturbance observers

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Science China(Information Sciences) 2010年第6期53卷 1201-1215页

作者： MEI Rong 1,2, WU QingXian 1 & JIANG ChangSheng 1 1 Automation college, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China 2 criminal investigation Department, Nanjing Forest Police college, Nanjing 210042, China 1. Automation college Nanjing University of Aeronautics and Astronautics Nanjing 210016 China2. Criminal Investigation Department Nanjing Forest Police College Nanjing 210042 China

In this paper, a novel robust adaptive control scheme for a class of uncertain nonlinear systems is proposed using disturbance observer and backstepping ***, a disturbance observer is developed using radial basis function(RBF) neural *** parameter updated law of the RBF neural network is given for monitoring subsystem disturbance *** robust adaptive control scheme is then presented with backstepping method based on the designed disturbance *** uniform ultimate boundedness(SGUUB) of all signals in the closed-loop uncertain nonlinear system is *** closed-loop system stability analysis shows that semiglobal uniform boundedness of all signals is guaranteed by appropriately choosing design ***, two examples are taken to illustrate the effectiveness of the proposed control scheme.

关键词： uncertain nonlinear systems disturbance observer RBF neural network backstepping control robust adaptive control

Padéapproximant approach to singular properties of quantum gases:the ideal cases

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Communications in Theoretical Physics 2021年第6期73卷 131-139页

作者： Yuan-Hong Tian Wen-Du Li Yao Shen Wu-Sheng Dai Department of Physics Tianjin UniversityTianjin 300350China college of Physics and Materials Science Tianjin Normal UniversityTianjin 300387China School of criminal investigation and Forensic Science People's Public Security University of ChinaBeijing 100038China

In this paper,we show how to recover the low-temperature and high-density information of ideal quantum gases from the high-temperature and low-density approximation by the Padé*** virial expansion is a high-temperature and low-density expansion and in practice,often,only the first several virial coefficients can be *** Bose gases,we determine the BEC phase transition from a truncated virial *** Fermi gases,we recover the low-temperature and high-density result from the virial expansion.

关键词： approximate analytic continuation virial expansion Padéapproximant quantum gas

Mitochondrial genome sequencing with short overlapping amplicons on MiSeq FGx system

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Forensic Sciences Research 2022年第2期7卷 142-153页

作者： Yang Xin Rulin Jia Suhua Zhang Fei Guo Shanghai Key Laboratory of Forensic Medicine Shanghai Forensic Service PlatformAcademy of Forensic ScienceMinistry of JusticeShanghaiChina Forensic Science college Criminal Investigation Police University of ChinaShenyangChina

With the development and maturation of massively parallel sequencing(MPS)technology,the mitochondrial genome(mitogenome)sequencing is increasingly applied in the forensic *** this study,we employed the strategy of short overlapping amplicons for the whole mitogenome,library preparation with tagmentation using the Nextera®XT DNA Library Preparation Kit,sequencing on the MiSeq FGxTM Forensic Genomics System and analyzing data using the mitochondrial(mtDNA)MSR Plug-in and the mtDNA Variant Analyzer.A total of 27 libraries and 56 libraries were sequenced in a run using MiSeq Reagent Kit v2 and v3,*** showed more than 1800×of averaged depth of coverage(DoC)at each *** haplotypes of 9947 A and 2800 M were obtained at 32 ***-reactivity was observed with 1 ng primate DNA and 10 ng non-primate DNA but could be easily *** and accurate variants were obtained from at least 50 pg input DNA and from minor contributors between 19:1 and 1:19 mixed ratios with known reference *** than 86%variants were detected from≥200-bp degraded samples but its haplotype was assigned to more ancestral ***,a total of 3962 variants were observed at 613 nucleotide positions from 103 Xibe mitogenomes with 25:1 ratio of transitions to *** new transversions(C13735A and A14755C)and two tri-alleles at nps 9824 and 16092 were *** were 103 unique mitogenome haplotypes from 103 Chinese Xibe that were assigned to 79 *** D was the preponderant top-level haplogroup in Xibe followed by F,B,M,A,N,G,C,Z,Y,HV and *** match probability(RMP)and haplotype diversity(HD)of the whole mitogenome was calculated as 0.0097 and 1.0000,*** with HVS-I only,RMP decreased 33.56%,while the number of haplotypes and HD increased 15.73%and 0.49%,*** component analysis(PCA)showed that Xibe was clustered to East and Southeast *** a whole,this MPS strategy i

关键词： Forensic sciences massively parallel sequencing MiSeq FGx system mitochondrial genome Xibe degraded samples

Numerical Simulations of the Transparency of Waterfront Bodies

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Tsinghua Science and Technology 2008年第5期13卷 720-729页

作者：王华逄勇丁玲刘明源庄红红 college of Environmental Science and Engineering Hohai University Shanghai investigation and Design Research Institute

Measured field data was used to analyze the factors which influence the transparency of the Nei River and to develop a multi-factor correlation for the transparency. A 2-D unsteady model which coupled analyses of the water flow, water quality, suspended sediments, and Chl-a was developed to simulate the changes in the transparency for various conditions. The model was then used to forecast the transparency of the Nei River. The suspended sediment concentration （SSC） was found to be the most important factor influencing the transparency, with high concentrations of CODMn and Chl-a also reducing the transparency to some extent. The transparency model is stable and precise, with relative errors between measured and calculated values of less than 15%. With the environmental scheduling schemes, the Nei River transparency can be significantly improved with a mean transparency in high-water years of 69.3 cm, normal-water years of 70.8 cm, and low-water years of 69.8 cm.

关键词： water bodies transparency model environmental planning Nei River

Exploration on the Teaching Reform of criminal investigation in Police college from the Perspective of Artificial Intelligence

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Exploration on the Teaching Reform of Criminal Investigation...

investigation of RQD variation with scanline length and optimal threshold based on three-dimensional fracture network modeling

2024社会发展与科技创新交流会

作者： Anqi Gu Hui Bian Jiangsu Police college Rongcheng Certified Public Accountants

Under the new trend of digital investigation in the new era, the actual demand of public security forces public security higher education to introduce artificial intelligence technology for reform. From the perspective of teaching reform of criminal investigation with artificial intelligence, this study takes the course of criminal investigation as an example, relying on key technologies such as data mining, natural language processing, deep learning and virtual simulation, and constructs a brand-new teaching content, teaching mode, learning mode and teaching evaluation.

关键词： Artificial intelligence Major in public security criminal investigation Teaching reform

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Science China Technological Sciences 2013年第3期56卷 739-748页

作者： ZHANG Wen CHEN JianPing WANG Qing MA DongHe NIU CenCen ZHANG Wu college of Construction Engineering Jilin University China Water Northeastern investigation Design & Research Co.Ltd. college of Automotive Engineering Jilin University

Rock-quality designation(RQD) plays a significant role in rock mass analysis and is an important parameter in geotechnical and geological ***,the RQD variation with scanline length has not yet been comprehensively considered in *** this study,three-dimensional fracture network modeling was used to simulate actual rock mass,and numerous scanlines were set in the fracture network for investigation on RQD *** and equations(i.e.,models A-A,N-N,and A-A-S,as well as the Priest-Hudson and Sen-Kazi equations) were summarized for the study.A corrected equation was proposed to eliminate the errors from using the Priest-Hudson and Sen-Kazi *** addition,inhomogeneous and anisotropic features were investigated,and the optimal thresholds for RQD calculation were determined,which varied with the study orientation and rock mass *** the inhomogeneity was studied in the x direction,the optimal threshold was found to be 4 *** anisotropy was studied,the optimal threshold was found to be 3 m.

关键词： rock mass inhomogeneity anisotropy fracture

ANALYTICAL SOLUTION OF GROUNDWATER FLUCTUATIONS IN ESTUARINE AQUIFER

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Journal of Hydrodynamics 2005年第5期17卷 641-646页

作者： CHEN Jing ZHOU Zhi-fang JIA Suo-bao college of Civil Engineering Hohai University Nanjing 210098 China Hydrology and Water Resources investigation Bureau of Jiangsu Province Nanjing 210029 China

As a basic factor in the environment of estuary, tidal effects in the coastal aquifer have recently attracted much attention because tidal dynamic also greatly influences the solute transport in the coastal aquifer. Previous studies on tidal dynamic of coastal aquifers have focused on the inland propagation of oceanic tides in the cross-shore direction, a configuration that is essentially one-dimensional. Two-dimensional analytical solutions for groundwater level fluctuation in recent papers are localized in presenting the effect of both oceanic tides and estuarine tides in quadrantal aquifer. A two-dimensional model of groundwater fluctuations in estuarine zone in proposed in this paper. Using complex transform, the two-dimensional flow equation subject to periodic boundary condition is changed into time-independent elliptic problem. Based on Green function method, an analytical solution for groundwater fluctuations in fan-shaped aquifer is derived. The response to of groundwater tidal loading in an estuary and ocean is discussed. The result show that its more extensive application than recent studies.

关键词： coastal aquifer analytical solution fanshaped area groundwater fluctuations Green function method estuary environment