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Predicting the Reflection Coefficient of a Viscoelastic Coating Containing a Cylindrical Cavity Based on an Artificial Neural Network Model

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Computer Modeling in Engineering & Sciences 2022年第2期130卷 1149-1170页

作者： Yiping Sun Qiang bai Xuefeng Zhao Meng tao School of Mechanical Engineering Guizhou UniversityGuiyang550025China Aviation Academy Guizhou Open UniversityGuiyang550003China

A cavity viscoelastic structure has a good sound absorption performance and is often used as a reflective baffle or sound absorption cover in underwater acoustic *** acoustic performance field has become a key research direction *** of the time-consuming shortcomings of the traditional numerical analysis method and the high cost of the experimental method for measuring the reflection coefficient to evaluate the acoustic performance of coatings,this innovative study predicted the reflection coefficient of a viscoelastic coating containing a cylindrical cavity based on an artificial neural network(ANN).First,themapping relationship between the input characteristics and reflection coefficient was *** the elastic modulus and loss factor value were smaller,the characteristics of the reflection coefficient curve were more *** key parameters affected the acoustic performance of the viscoelastic ***,a dataset of the acoustic performance of the viscoelastic coating containing a cylindrical cavity was generated based on the finite elementmethod(FEM),which avoided a large number of repeated *** minmax normalization method was used to preprocess the input characteristics of the viscoelastic coating,and the reflection coefficient was used as the dataset *** grid search method was used to fine-tune the ANNparameters,and the prediction error was studied based on a 10-fold ***,the error distributions were *** average root means square error(RMSE)and the mean absolute percentage error(MAPE)predicted by the improved ANN model were 0.298%and 1.711%,respectively,and the Pearson correlation coefficient(PCC)was 0.995,indicating that the improved ANN model accurately predicted the acoustic performance of the viscoelastic coating containing a cylindrical *** practical engineering applications,by expanding the database of the material range,cavity size and backing of the coating

关键词： Coating acoustic performance artificial neural network predicting

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Estimation of Thermal Imaging System Operating Range Based on Background Radiation

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Journal of Beijing Institute of Technology 2018年第2期27卷 241-249页

作者： Tingzhu bai Long shao Heng He Peishan Song School of Optoelectronics Beijing Institute of Technology

Traditional operating range prediction methods assume that the atmospheric radiances in a target path and a background path are equal. But they are different in a real-world environment. To solve this problem,the influence of atmospheric radiance on operating range prediction is analyzed in this paper. Range estimation model in thermal imaging based on background radiation（ REBR） is proposed. Infrared image radiometric calibration is used to calculate the background radiation of a system entrance pupil. The result shows that,compared with traditional operating range prediction methods,the REBR method is more suitable for the actual atmospheric transmission process and the physical process of infrared imaging.

关键词： atmospheric radiance operating range background radiation radiometric calibration

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Quantitative evaluation of air pollution in transport strategic environmental assessment:a case study based on uncertainty analysis and graphic information system technology

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第5期11卷 370-381页

作者： Hong-tao bai Hui-zhi WANG He XU Tan ZHU Research Center for Strategic Environmental Assessment Nankai University Tianjin 300071 China

Although the impact of road transport on urban air quality has achieved a high profile in China,still greater attention is required as it has not yet been considered fully even in relation to the road network linking cities and urban areas. Strategic environmental assessment (SEA) is a systematic and comprehensive process for evaluating the environmental impacts of a policy,plan or program in publicly accountable decision-making. Air pollution has been recognized as a significant issue in most transport SEA practices. The Strategic Environmental Assessment of the Hubei Road Network Plan (2002-2020) (HRNP) was introduced as one of the World Bank's pilot SEA projects. An effective framework was developed to investigate the functional relationship between the road network and its potential air pollutant emissions. In this study,two indicators were identified:emission intensity/ inventory of pollutants and the spatial distribution of the most polluted areas. Because strategic actions are inherently nebulous and data quality is often disappointing,three alternative scenarios were employed to address uncertainties and data/scale issues. Calculations were made using emission models and results were analyzed with the help of statistical tools and the geographic information system (GIS). The results from the project implementation and the feedback from the World Bank have both shown that the proposed framework is effective in the transport SEA process.

关键词： Air pollution Transport strategic environmental assessment (SEA) Quantitative evaluation Uncertainty

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Microstructure of charged AdS black hole with minimal length effects

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Chinese Physics C 2022年第12期46卷 298-311页

作者： Ningchen bai Aoyun He Jun tao Center for Theoretical Physics College of PhysicsSichuan UniversityChengdu 610065China

In this work,the microstructure of charged AdS black holes under minimal length effects is *** study the thermodynamics of black holes in the extended phase space,where the cosmological constant is regarded as the thermodynamic *** modified Hawking temperature and phase transition are obtained based on the generalized uncertainty principle(GUP).Then,using thermodynamic geometry,the microstructure of black holes can be determined by the ratio of the GUP parameter to *** a small ratio,the black hole exhibits the typical RN-AdS microstructure with van der Waals phase transition and repulsive/attractive *** the ratio increases,the reentrant phase transition is observed,and both the repulsion-attraction coexisted and the attraction dominated black holes are *** a large ratio,the black hole behaves like a Schwarzchild-AdS black hole in which neither phase transition nor repulsive interaction are *** results suggest that the GUP effect will reduce the repulsive interaction presented by the charged AdS black hole.

关键词： black hole microstructure generalized uncertainty principle black hole thermodynamics

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Comprehensive transcriptional atlas of human adenomyosis deciphered by the integration of single-cell RNA-sequencing and spatial transcriptomics

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Protein & Cell 2024年第7期15卷 530-546页

作者： tao Chen Yiliang Xu Xiaocui Xu Jianzhang Wang Zhiruo Qiu Yayuan Yu Xiaohong Jiang Wanqi shao Dandan bai Mingzhu Wang Shuyan Mei tao Cheng Li Wu shaorong Gao Xuan Che Department of Obstetrics and Gynecology Affiliated Women and Children Hospital of Jiaxing UniversityJiaxing 314000China Shanghai Key Laboratory of Maternal Fetal Medicine Clinical and Translational Research Center of Shanghai First Maternity and Infant HospitalFrontier Science Center for Stem Cell ResearchSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China Key Laboratory of Animal Bioengineering and Disease Prevention of Shandong Province College of Animal Science and TechnologyShandong Agricultural UniversityTaian 271018China Women’s Hospital School of MedicineZhejiang UniversityHangzhou 310013China Postgraduate training base Alliance of Wenzhou Medical University Wenzhou Medical UniversityWenzhou 325035China Jiaxing University Master Degree Cultivation Base Zhejiang Chinese Medical UniversityHangzhou 310053China Shanghai Key Laboratory of Maternal Fetal Medicine Shanghai Institute of Maternal-Fetal Medicine and Gynecologic OncologyClinical and Translational Research CenterShanghai First Maternity and Infant HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghai 200092China

Adenomyosis is a poorly understood gynecological disorder lacking effective *** persists regarding“invagination”and“metaplasia”*** endometrial-myometrial junction(EMJ)connects the endometrium and myometrium and is important for diagnosing and classifying adenomyosis,but its in-depth study is just *** single-cell RNA sequencing and spatial profiling,we mapped transcriptional alterations across eutopic endometrium,lesions,and *** lesions,we identified unique epithelial(LGR5+)and invasive stromal(PKIB+)subpopulations,along with WFDC1+progenitor cells,supporting a complex interplay between“invagination”and“metaplasia”theories of ***,we observed endothelial cell heterogeneity and abnormal angiogenic signaling involving vascular endothelial growth factor and angiopoietin ***-cell communication differed markedly between ectopic and eutopic endometrium,with aberrant signaling in lesions involving pleiotrophin,TWEAK,and WNT *** study reveals unique stem cell-like and invasive cell subpopulations within adenomyosis lesions identified,dysfunctional signaling,and EMJ abnormalities critical to developing precise diagnostic and therapeutic strategies.

关键词： adenomyosis single-cell RNA sequencing spatial transcriptomics endometrial-myometrial junction progenitor cells

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Exact Solutions to Extended Nonlinear Schrodinger Equation in Monomode Optical Fiber

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Communications in Theoretical Physics 2006年第1期45卷 131-134页

作者： bai Cheng-Lin ZHAO Hong Wang Wei-tao Physical Science and Information Engineering School Liaocheng University Liaocheng 252059 China

By using the generally projective Riccati equation method, more new exact travelling wave solutions to extended nonlinear Schrodinger equation （NLSE）, which describes the femtosecond pulse propagation in monomode optical fiber, are found, which include bright soliton solution, dark soliton solution, new solitary waves, periodic solutions, and rational solutions. The finding of abundant solution structures for extended NLSE helps to study the movement rule of femtosecond pulse propagation in monomode optical fiber.

关键词： extended NLSE generally projective Riccati equation method soliton solutions optical fiber

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Preliminary study on the efficacy of lacrimal duct reconstruction with pedicled conjunctival flap in the treatment of severe lacrimal canalicular obstruction with conjunctivochalasis

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International Journal of Ophthalmology(English edition) 2023年第4期16卷 539-546页

作者： Gao-Xiang Ouyang Fang bai Hai tao Department of Ophthalmology the Third People’s Hospital of DalianDalian 116033Liaoning ProvinceChina Lacrimal Center Senior Department of Ophthalmologythe Third Medical Center of Chinese PLA General HospitalBeijing 100039China

AIM:To determine the efficacy and safety of pedicled conjunctival lacrimal duct reconstruction in the treatment of severe obstruction of superior and inferior lacrimal canaliculi with ***:This study was per formed as a retrospective analysis of patients who received conjunctival dacryocystorhinostomy with pedicled conjunctival flap reconstruction combined with tube intubation due to severe superior and inferior lacrimal canalicular obstruction with conjunctivochalasis from January 2019 to October *** clinical data included the degree of preoperative epiphora and postoperative relief,preoperative examination of lacrimal duct computed tomography and ultrasound biomicroscopy,postoperative evaluation of lacrimal duct function by chloramphenicol taste and fluorescein dye disappearance test,*** was carried out to determine the reconstruction and patency of the lacrimal ***:All 9 patients(9 eyes)had severe canalicular obstruction with *** patients included 4 males and 5 females aged between 47–65y with an average age of 52.2±*** 3mo follow-up,the tube was removed and the patients were followed for a further *** tube removal,6 patients showed no *** patients also had positive chloramphenicol tastes and normal fluorescein dye disappearance test *** patientshad ***,syringing showed partial patency of the reconstructed lacrimal *** patient had no improvement in epiphora with negative chloramphenicol taste and fluorescein dye disappearance test results and obstruction of the reconstructed lacrimal *** total effective rate of the operation was 8/9,with no serious ***:Pedicled conjunctival lacrimal duct reconstruction conjunctival dacryocystorhinostomy is safe and effective for superior and inferior canalicular obstruction with conjunctivochalasis.

关键词： epiphora severe lacrimal canalicular obstruction conjunctival dacryocystorhinostomy pedicled conjunctival flap reconstruction conjunctivochalasis

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Sequence-specific Hydrolysis of Single-stranded DNA by PNA-Cerium （Ⅳ） Adduct

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Chinese Chemical Letters 2005年第12期16卷 1663-1666页

作者： He bai SHEN Feng WANG Yong tao YANG College of Life ＆ Environment Science Shanghai Normal University Shanghai 200234

A novel artificial site specific cleavage reagent, with peptide nucleic acid （PNA） as sequence-recognizing moiety and cerium （IV） ions as “scissors” for cleaving target DNA, was synthesized. Subsequently, it was employed in the cleavage of target 26-mer single-stranded DNA （ssDNA）, which has 10-mer sequence complementary with PNA recognizer in the hybrids, under physiological conditions. Reversed-phase high-performance liquid chromatogram （RPHPLC） experiments indicated that the artificial site specific cleavage reagent could cleave the target DNA specifically.

关键词： Peptide nucleic acid (PNA) artificial site specific cleavage reagent hydrolysis reversed-phase high-performance liquid chromatogram (RP-HPLC)

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Effect of nano-SiC particles on the corrosion resistance of NiP-SiC composite coatings

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International Journal of Minerals,Metallurgy and Materials 2009年第4期16卷 444-451页

作者： Xue-tao Yuan Dong-bai Sun Hong-ying Yu Yu Wang School of Materials Science and Technology University of Science and Technology Beijing Beijing 100083 China Beijing Engineering-Research Center for Surface Nano-Technology Beijing 100083 China

NiP-SiC （≈1 1wt% P） composite coatings were electroplated in a Brenner type plating bath. The coatings had amorphous nano-phase composite structure. Direct current and alternating current electrochemical tests were carried out on such coatings in a 3.5wt% solution of NaCl to evaluate their corrosion resistance. The potentiodynamic polarization, electrochemical impedance spectroscopy （EIS） tests, and exposure experiments all show that the corrosion resistance of NiP-SiC coatings first increases and then decreases when the SiC content increases, but the corrosion resistance of NiP-SiC composite coating is better than that of amorphous NiP coatings.

关键词： electroplating composite coating nanoparticle corrosion resistance electrochemical impedance spectroscopy

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A Novel Long-Time Coherent Integration Method for Moving Target Detection

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Journal of Beijing Institute of Technology 2021年第4期30卷 340-351页

作者： Xia bai Yan Wang Juan Zhao Ran tao School of Information and Electronics Beijing Institute of TechnologyBeijing 100081China

Long-time coherent integration(LTCI)can remarkably improve the detection ability of radar for moving *** increase the processing efficiency,this paper proposes a novel LTCI method based on segment time reversing transform(STRT)and chirp z-transform(CZT).In this method,STRT operation is first presented to estimate the Doppler ambiguity factor,and keystone transform(KT)is used to correct the whole range migration(RM).Then,CZT and non-uniform fast Fourier transform(NUFFT)are used to estimate the parameters as well as correct the second and third order Doppler frequency migration(DFM).Compared with the existing methods,the proposed method can achieve RM correction and DFM correction without repetitive *** effectiveness of the proposed method is validated by both simulated and real data.

关键词： long-time coherent integration range migration Doppler frequency migration

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