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GLAC-SVM Combined Poselet with Blocked Particle Filter for Human Detection and Tracking
Qin Tong Liu,Ngoc Nam Bui,Jin Young Kim(김진영) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.2
Human tracking based detection (HAR) in recent years has attracted much attention from the research community due to its challenges as well as wide application. In this paper, we investigate the use of Poselet detector verified by Gradient Local Auto Correlation (GLAC) and Support Vector Machine (SVM) for detecting human boundary. After that, each detected candidate is associated with a suitable tracker following the Probabilistic Data Association Filter(PDAF). For those tracker that has not been assigned, a tracking approach based block Particle Filter is in charge to maintain their existence. We conduct our experiments the open dataset PESTS 2009 and our self-recorded one CNU. We compare our method with Adaptive Boosting (Adaboost) particles filter tracking in the case of CNU dataset. The average accuracy of Blocked Particle Filter is 56.41% which outperforms that of Adaboost tracking with only 25.58%.
Preparation and High Degradation Activity of Supported Nano-Bi2WO6-TiO2/Nickel Foam Photocatalyst
Qin Tong,Ya-Mei Dong,Xiao-Jia Wang,Peng Yan,Dan-Nong He 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2015 NANO Vol.10 No.6
The supported nano-Bi2WO6–TiO2/nickel foam photocatalyst was synthesized via spraying method with silica sol as a binder. The as-prepared photocatalyst with large surface and thermal stability exhibited enhanced photocatalytic performance for degradation of Rhodamine B (RhB) solution in sunlight irradiation. The results showed that the RhB solution could be degraded to 71.6% within 60 min, exhibiting that improved photocatalytic activity increased by 77.6%, compared with that of pure Bi2WO6–TiO2 nanoparticles. Its high photocatalytic activity was due to the presence of nickel foam in the catalytic process, making the Bi2WO6–TiO2 highly dispersed and increasing the contact area of the photocatalysts with the organic pollutants. At the same time, a possible photocatalytic mechanism for the enhanced photocatalytic performance was investigated.
Preparation of PAN/GO composite nanofiber membrane for oil-containing wastewater treatment
Lu Tong,Zhang Qingxia,Yang Jingjing,Xin Yue,Zhang Zhilei,Hu Lingye,Hu Jing,Qin Qin,Yang Hao 한국탄소학회 2024 Carbon Letters Vol.34 No.1
The discharge of industrial oily wastewater and oil spill accidents has resulted in significant environmental pollution, creating an urgent need for the treatment of oily wastewater. Nanofiber membranes, known for their high stability, flux, and efficiency, are widely employed in oil–water separation. This study systematically compared the performance of polyacrylonitrile/graphene oxide (PAN/GO) composite nanofiber membranes prepared through immersion and electrospinning methods for oily wastewater treatment. Experimental findings demonstrated that immersion-prepared membranes achieved high flux (772.9 ± 2.9 L·m−2·h−1, n-hexane/water mixture) and efficiency (98.8%) at a GO concentration of 1.0 g/mL. On the other hand, electrospinning-prepared membranes exhibited superior flux (1500.3 ± 4.4 L·m−2·h−1, n-hexane/water mixture) and efficiency (99.6%) at a higher GO concentration (1.5 g/mL). This membrane displayed excellent stability, maintaining their exceptional performance even after ten cycles of separation. This study compared the advantages and disadvantages of the two methods for preparation of PAN/GO composite nanofiber membrane, offering valuable guidance for practical applications.
Exergy analysis of two-stage steam-water jet injector
Qin Cai,Mingwei Tong,Xiujuan Bai 한국화학공학회 2012 Korean Journal of Chemical Engineering Vol.29 No.4
Exergy analysis is used as a tool to evaluate exergy losses in the steam-water jet injector so as to improve its overall performance. What this article addresses here is mainly about a parametric study on the injector under various operating conditions, such as different inlet water temperature, inlet steam pressure, pressure ratio, entrainment ratio and flowrate ratio. In addition, the irreversible losses in the component parts of the two-stage injector were analyzed in detail. The results show that the operating parameters have great effects on exergy efficiency of the injector. The average exergy efficiency of the two-stage injector is 21% more than that of the single-stage one. Moreover, calculations based on experimental data indicate that the highest exergy losses due to irreversibility occur in the first-stage mixing chamber. In light of this comparison, the exergy losses occurring in the system are proportional to the exergy efficiency obtained by applying the system.
TONG Guang-ji,QIN Li 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
On the discussion of food safety, the majority of China"s scholars believe that the food manufacturer should responsible for its inferior productis, The food manufacturer should be punished by government more than that of wholesaler retailer. But the punishment produces less effect on the food manufacturer"s adverse selection. This paper establishes a three-sector model, and analyzes empirically the distribution of benefits among food manufacturer, wholesaler and retailer. The research result shows that the unreasonable distribution of benefits resulting in manufacturer"s adverse selection on food safety in supply chain. Therefore, in order to improve the governance of food quality and safety, government should concern about the distribution of benefits among food manufacturer, wholesaler and retailer in supply chain. Based on the above analysis, this paper puts forward some corresponding recommendations.
Analysis Technique of Spectral Characteristics AE Signals with Application to Monitored for WT
Qin Hongwu,Zhang Xian,Chu Wei,Fan Qinyin,Peng Jincheng,Jia Tongli 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.1
The paper presents the results of an assessment with a range as real AE signals are received at destruction of spot welding, and imitated by means of a AE transducer are given in work, efficiency use of high-frequency area for recognition of AE signals against hindrances is shown. The actuator is excited by an impulse signal instead of a sinewave, and the responses are measured with the PE sensors. The spectral characteristics of AE signals should use broadband transducers with the rise in the PE side of the treble to compensate for PE of the sample, and partly of the signal spectrum, which is reduced the measurement error of the absolute values. The damage could be indicated in an experiment, but it turned out that the sensitivity is low if the damage is not in the path between actuator and sensor. When a machine has a mistake, it leads to energy loss and results in the transformation of sound, heat and the whole performance. The basis of most condition monitoring techniques WT has been constructed by the various features.
An, Tong,Tian, Yanzhong,Qin, Fei,Dai, Yanwei,Gong, Yanpeng,Chen, Pei The Korean Institute of Power Electronics 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.9
This paper presents an experimental investigation and a finite element (FE) analysis study on the thermal and mechanical behaviors of insulated-gate bipolar transistor (IGBT) power modules under various operating conditions. The power cycling test conditions are provided by two test benches, a direct current (DC) test bench and a pulse width modulation (PWM) test bench. Infrared (IR) camera acquisition methods are suggested as an approach for transient temperature measurements to estimate the effects of operating conditions and switching frequency on the thermal performance of an IGBT module. An electrical-thermal-mechanical FE model of an IGBT module is employed to determine the stress in the interconnections of an IGBT module induced by junction temperature fluctuations. Results indicate that the operating conditions significantly impact the maximum junction temperature, the junction temperature increase rate, and the junction temperature distribution of an IGBT chip and the thermally induced stress in the interconnections. The switching frequency strongly impacts the junction temperature of an IGBT chip, and the maximum junction temperature increases when the switching frequency increases due to the increasing switching loss. Furthermore, the junction temperature variation induced by the instantaneous switching loss is estimated by the proposed IR camera measurement method.