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Emotion recognition from thermal infrared images using deep Boltzmann machine

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Frontiers of Computer Science 2014年第4期8卷 609-618页

作者： Shangfei WANG Menghua HE zhen gao Shan HE Qiang JI School of Computer Science and Technology University of Science and Technology of China Hefei 230027 China Key Lab of Computing and Communicating Software of Anhui Province Hefei 230027 China Department of Electrical Computer and Systems Engineering Rensselaer Polytechnic Institute Troy NY 12180-3590 USA

Facial expression and emotion recognition from thermal infrared images has attracted more and more attentions in recent years. However, the features adopted in current work are either temperature statistical parameters extracted from the facial regions of interest or several hand-crafted features that are commonly used in visible spectrum. Till now there are no image features specially designed for thermal infrared images. In this paper, we propose using the deep Boltzmann machine to learn thermal features for emotion recognition from thermal infrared facial images. First, the face is located and normalized from the thermal infrared im- ages. Then, a deep Boltzmann machine model composed of two layers is trained. The parameters of the deep Boltzmann machine model are further fine-tuned for emotion recognition after pre-tralning of feature learning. Comparative experimental results on the NVIE database demonstrate that our approach outperforms other approaches using temperature statistic features or hand-crafted features borrowed from visible domain. The learned features from the forehead, eye, and mouth are more effective for discriminating valence dimension of emotion than other facial areas. In addition, our study shows that adding unlabeled data from other database during training can also improve feature learning performance.

关键词： emotion recognition thermal infrared images deep Boltzmann machine

Synthesis of TiO_2 nanoparticles by propane/air turbulent flame CVD process

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Particuology 2009年第3期7卷 204-210页

作者： Hongyong Xie Guilan gao zhen Tian Naici Bing Lijun Wang School of Urban Development and Environmental Engineering Shanghai Second Polytechnic University 2360 Jin Hal Road Pudong Shanghai 201209 China

Synthesis of TiO2 nanoparticles by the oxidation of titanium tetrachloride （TiCI4） in high-strength propane/air turbulent flame is investigated tentatively for mass production of TiO2 nanoparticles. Effects of reactor heat flux varying from 247 to 627 kJ/m^2 s, initial TiO2 number density from 2 × 10^20 to 1 × 10^21 m^ 3, and apparent residence time of TiO2 nanoparticles in reactor from 0.06 to 0.9 s, on particle morphology, phase composition, UV absorption and photoluminescence （PL） spectra are studied. The TiO2 nanoparticles synthesized, with mean size of 30-80 nm and futile mass fraction from 0.155 up to 0.575, exhibited a strong PL signal at the wavelength of 370-450 nm, with a wide peak signal at 400-420 nm, reflecting significant oxygen vacancies on the surface of the TiO2 nanoparticles.

关键词： CVD Turbulent flame TiO2 nanoparticles PL spectra

Numerical study of heat-transfer in two-and quasi-two-dimensional Rayleigh–Bénard convection

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Chinese Physics B 2018年第10期27卷 405-412页

作者： zhen-Yuan gao Jia-Hui Luo Yun Bao Department of Mechanics Sun Yat-Sen UniversityGuangzhou 510275China

A detailed comparative numerical study between the two-dimensional（2 D） and quasi-two-dimensional（quasi-2 D）turbulent Rayleigh–B＇enard（RB） convection on flow state, heat transfer, and thermal dissipation rate（TDR） is made. The Rayleigh number（Ra） in our simulations ranges up to 5×10^10 and Prandtl number（Pr） is fixed to be 0.7. Our simulations are conducted on the Tianhe-2 supercomputer. We use an in-house code with high parallelization efficiency, based on the extended PDM–DNS scheme. The comparison shows that after a certain Ra, plumes with round shape, which is called the ＂temperature islands＂, develop and gradually dominate the flow field in the 2 D case. On the other hand, in quasi-2 D cases, plumes remain mushroom-like. This difference in morphology becomes more significant as Ra increases, as with the motion of plumes near the top and bottom plates. The exponents of the power-law relation between the Nusselt number（Nu） and Ra are 0.3 for both two cases, and the fitting pre-factors are 0.099 and 0.133 for 2 D and quasi-2 D respectively,indicating a clear difference in magnitude of the heat transfer rate between two cases. To understand this difference in the magnitude of Nu, we compare the vertical profile of the horizontally averaged TDR for both two cases. It is found that the profiles of both cases are nearly the same in the bulk, but they vary near boundaries. Comparing the bifurcation height zb with the thermal boundary layer thickness dq, it shows that zb 〈 δθ（3 D）〈 δθ（2 D） and all three heights obey a universal power-law relation z ~Ra^-0.30. In order to quantify the difference further, we separate the domain by zb, i.e., define the area between two zb（near top and bottom plates respectively） as the ＂mid region＂ and the rest as the ＂side region＂, and integrate TDR in corresponding regions. By comparing the integral it is found that most of the difference in TDR between two cases, which is connected to the heat transfer rate, occurs within the thermal b

关键词： Rayleigh-Benard convection Nusselt number turbulence thermal dissipation

The Limit Theorems for Random Walk with State Space R in a Space-time Random Environment

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Acta Mathematica Sinica,English Series 2008年第4期24卷 655-662页

作者： Wei Gang WANG zhen Long gao Di He HU School of Statistics and Mathematics Zhejiang Gongshang University Hangzhou 310018 P. R. China School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China School of Mathematics Anyang Normal University Anyang 455000 P. R. China

We consider a discrete time random environment. We state that when the random walk on real number space in a environment is i.i.d., under the law, the law of large numbers, iterated law and CLT of the process are correct space-time random marginal annealed Using a martingale approach, we also state an a.s. invariance principle for random walks in general random environment whose hypothesis requires a subdiffusive bound on the variance of the quenched mean, under an ergodic invariant measure for the environment chain.

关键词： space-time random environment the law of large numbers CLT iterated law invariance principle

Efficacy of Qizi Yusi Pill on Pregnancy Outcomes in Women of Advanced Reproductive Age:A Multicenter,Randomized,Double-Blind,Placebo-Controlled Trial

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Chinese Journal of Integrative Medicine 2022年第8期28卷 675-682页

作者： ZHANG Yi QIAO Yan LI Li gao Dan-dan SONG Jing-yan SUN zhen-gao College of Traditional Chinese Medicine Shandong University of Traditional Chinese MedicineJinan250355China The First Clinical College Shandong University of Traditional Chinese MedicineJinan250014China Reproductive and Genetic Center of Integrated Medicine The Affiliated Hospital of Shandong University of Traditional Chinese MedicineJinan250011China

Objective:To evalvate efficacy of Qizi Yusi Pills(QYP),a Chinese medicine compound preparation,on in vitro fertilization-embryo transfer(IVF-ET)in women of advanced reproductive ***:This multicenter,randomized,double-blind,placebo-controlled trial was conducted from June 2018 to October2019.A total of 124 patients were randomly allocated to either the QYP group or the placebo group using a stratified block randomization design,with 62 patients in each *** patients completed controlled ovarian stimulation using a standard gonadotropin-releasing hormone agonist(GnRH-a)long *** the QYP group,QYP was administered while the control group received *** and placebo were administered for a total of 24 to 30 days from the day of GnRH-a pituitary downregulation to transvaginal oocyte *** medications were taken orally at doses of 10 g three times each *** primary outcome was cumulative pregnancy rate,and the secondary outcomes were periodic medication,follicular status,serum hormone and endometrial ***-up continued until 4 weeks after *** and neonatal complications,such as gestational diabetes,were also ***:Overall,119 patients completed the study,60 in the QYP group and 59 in the placebo *** protocol(PP)analysis revealed that 6-month cumulative pregnancy rate in the QYP group was significantly higher than that in the placebo group[43.33%(26/60)vs.25.42%(15/59),P=0.040].Additionally,more oocytes were retrieved from the QYP group than those from the placebo group(8.95±3.12 vs.7.85±1.91,P=0.022).Moreover,the endometrial thickness of HCG day in the QYP group was significantly higher than that in the placebo group(11.78±2.27 mm vs.10.68±2.07 mm,P=0.012).Maternal and neonatal complications between the two groups were not significantly different(P>0.05).Intention-to-treat analysis was in line with PP ***:QYP can enhance ovarian reserve capacity and ovarian response,and possibl

关键词： advanced age Qizi Yusi Pills in vitro fertilization-embryo transfer randomized controlled trial

Mass spectrometric study of Ag's clustering ability with O,S and Se

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Chinese Science Bulletin 2001年第7期46卷 543-549页

作者： Xiaopeng Xing Xia Zhang Xiang Zhao zhen gao State Key Laboratory of Molecular Reaction Dynamics Center of Molecular Science Institute of Chemistry Beijing China

Samples Ag/O/S, Ag/O/Se and Ag/S/Se were ablated directly by laser to produce clusters. The detection was performed with a time-of-flight mass spectrometer (TOF MS). The cluster ions produced had the following distribution: Ag/S binary cluster ions for sample Ag/O/S, Ag/Se binary cluster ions for sample Ag/O/Se, and Ag/Se binary cluster ions and Ag/S/Se ternary cluster ions as the main products for sample Ag/S/Se. Laser double ablation reactor was used to study the reaction between Ag/S(Se, O) binary clusters and Se(S) homoclusters. The experiments show that Se clusters can replace S and O in Ag/S and Ag/O clusters while S clusters can replace O in Ag/O clusters. This fact indicates the sequence of the clustering ability of Ag presented as follows: Ag/Se > Ag/S > Ag/O, which was also proved by theoretical calculation. The reason of this tendency was considered to be the different abilities of the elements’ polarization, which acts on the stability of clusters.

关键词： laser ablation time-of-flight mass spectrometer Ag/O(S Se) atom clusters clustering ability.

Comparative numerical and experimental study of two combined wind and wave energy concepts

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Journal of Ocean Engineering and Science 2016年第1期1卷 36-51页

作者： zhen gao Torgeir Moan Ling Wan Constantine Michailides Centre for Ships and Ocean Structures Norwegian University of Science and TechnologyTrondheimNorway Centre for Autonomous Marine Operations and Systems Norwegian University of Science and TechnologyTrondheimNorway Department of Marine Technology Norwegian University of Science and TechnologyTrondheimNorway

With a successful and rapid development of offshore wind industry and increased research activities on wave energy conversion in recent years,there is an interest in investigating the technological and economic feasibility of combining offshore wind turbines(WTs)with wave energy converters(WECs).In the EU FP7 MARINA Platform project,three floating combined concepts,namely the spar torus combination(STC),the semi-submersible flap combination(SFC)and the oscillating water column(OWC)array with a wind turbine,were selected and studied in detail by numerical and experimental *** paper summarizes the numerical modeling and analysis of the two concepts:STC and SFC,the model tests at a 1:50 scale under simultaneous wave and wind excitation,as well as the comparison between the numerical and experimental *** operational and survival wind and wave conditions were *** numerical analysis was based on a time-domain global model using potential flow theory for hydrodynamics and blade element momentum theory(for SFC)or simplified thrust force model(for STC)for *** techniques for model testing of combined wind and wave concepts were discussed with focus on modeling of wind turbines by disk or redesigned small-scale rotor and modeling of power take-off(PTO)system for wave energy conversion by pneumatic damper or hydraulic rotary *** order to reduce the uncertainty due to scaling,the numerical analysis was performed at model scale and both the numerical and experimental results were then up-scaled to full scale for *** comparison shows that the current numerical model can well predict the responses(motions,PTO forces,power production)of the combined concepts for most of the ***,the linear hydrodynamic model is not adequate for the STC concept in extreme wave conditions with the torus fixed to the spar at the mean water level for which the wave slamming on the torus occurs and this requires further investigati

关键词： Combined wind and wave energy concept Floating wind turbine Wave energy converter Numerical analysis Model test.

Edge Detectors Based on Pauta Criterion with Application to Hybrid Compact-WENO Finite Difference Scheme

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Advances in Applied Mathematics and Mechanics 2023年第6期15卷 1379-1406页

作者： Chunhua Zhang zhen gao Sa Ye Peng Li School of Mathematical Sciences Ocean University of ChinaQingdaoShandong 266100China Institute of Agricultural Information Chinese Academy of Agricultural SciencesKey Laboratory of Agricultural Big DataMinistry of Agriculture and Rural AffairsBeijing 100081China Department of Engineering Mechanics Shijiazhuang Tiedao UniversityShijiazhuangHebei 050043China

In the last two decades,many edge detection methods have been developed and widely used in image processing for edge detection and the hybrid compactWENO finite difference(hybrid)schemes for solving the system of hyperbolic conservation laws with solutions containing both discontinuous and complex fine-scale ***,many edge detection methods include the problem-dependent parameters such as the high order multi-resolution(MR)analysis(Harten,JCP,49(1983)).Therefore,we combined the Tukey’s boxplot method with MR analysis(gao et al.,JSC,73(2017))to overcome this problem in a *** the Tukey’s boxplot method needs to sort the data at the beginning of Runge-Kutta time integration method,which is relatively time-consuming and *** this study,we employ the PauTa criterion and remove the problem-dependent parameters in the MR ***,two new edge detection approaches,which are based on second-order central difference scheme and Ren’s idea(Ren et al.,JCP,192(2003)),are also *** accuracy,efficiency and robustness of the hybrid scheme with the new edge detectors are verified by numerous classical one-and two-dimensional examples in the image processing and compressible Euler equations with discontinuous solutions.

关键词： Edge detection Pauta criterion multi-resolution hybrid

Improved proportional fair dynamic subcarrier allocation with frugality constraint for SC-FDMA system

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The Journal of China Universities of Posts and Telecommunications 2013年第2期20卷 54-59页

作者： LI Yi-bing ZHANG Xu YE Fang gao zhen-guo School of Information and Communication Engineering Harbin Engineering University School of Automation Harbin Engineering University

With the objective of taking full use of channel resource, we proposed two utility based dynamic subcarrier allocation （DSA） algorithms for the single carrier frequency division multiple access （SC-FDMA） system, which are the proportional fair frugality constrained （PF-FC） algorithm and the weighted proportional fair frugality constrained （WPF-FC） algorithm. The two proposed algorithms are designed under the frugality constraint （FC） control consideration so as to avoid service rate waste and improve the spectrum efficiency. Moreover, the queuing buffer model in this paper is established on a finite size structure rather than the traditional infinite queuing manner, which is more consistent with the practical transmission condition. Simulation results indicate that the two proposed algorithms can both achieve significantly better system rate-sum capacity and quality of service （QoS） performance than their primary algorithms, and are more applicable for the heterogeneous traffic.

关键词： SC-FDMA DSA QoS FC proportional fair (PF) algorithm weighted proportional fair (WPF) algorithm