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Double-branch forgery image detection based on multi-scale feature fusion

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Optoelectronics Letters 2024年第5期20卷 307-312页

作者： ZHANG hongying GUO Chunxing WANG Xuyong College of Electronic Information and Automation Civil Aviation University of ChinaTianjin 300300China

Most of existing methods exhibit poor performance in detecting forged images due to the small size of tampered areas and the limited pixel difference between untampered and tampered regions. To alleviate the above problem, a double-branch tampered image detection based on multi-scale features is proposed. Firstly, we introduce a fusion module based on attention mechanism in the first branch to enhance the network's sensitivity towards tampered regions. Secondly, we construct a second branch specifically designed for detection, aiming to identify subtle differences between tampered and untampered areas by utilizing rich edge information from shallow features as guidance. Compared to the existing methods on the public benchmark datasets CASIA1.0, Columbia and NIST16, the values of F-score reached 0.766, 0.900 and 0.930 on those datasets, respectively. The experimental results show that our method could significantly improve the accuracy on detecting the tampered area.

关键词： branch image utilizing

Partial amination of cationic exchange resins and its application in the hydration of butene

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Journal of Natural Gas Chemistry 2012年第3期21卷 314-318页

作者： Deren Fang Wanzhong Ren hongying Lu Hongtao Yang Provincial Key Lab of Chemical Manufacture Engineering Yantai UniversityYantai 264005ShangdongChina Institute of Applied Catalysis of Yantai University Yantai 264005ShandongChina

In this work, the amination of sulfonated polystyrene resin with alkyl secondary amine is investigated. The catalytic activities of the modified resins are determined through the hydration of l-butene. The optimum chain length and the best range of amination rate are determined. It is found that the single-pass conversion of 1 -butene was raised 2% on average, and the relative activity was increased over 30% after modification. A hypothesis about the enhancement of catalytic activities by the inclusion of alkyl chain to wrap up the butene molecule is proposed.

关键词： amination sulfonated polystyrene resin butene hydration catalytic activity mechanism inclusion

Effect of Variable Blank Holder Force on Rectangular Box Drawing Process of Hot-galvanized Sheet Steel

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Journal of Materials Science & Technology 2005年第6期21卷 909-913页

作者： Qunqiang FU Wei ZHU Zhiliang ZHANG hongying GONG China National Mold and Die CAD Engineering Research Center Shanghai Jiao Tong University Shanghai 200030 China Department of Material processing Jiangxi Institutue of Technology Ganzhou 341000 China

At first, a series of finite element method （FEM） simulation tests were used to find the critical forming conditions of hot-galvanized sheet steel during the rectangular box drawing processing when constant blank holder forces were applied. According the test results, the reasonable alteration scope of initial variable blank holder force （VBHF） was as 1.9-2.3 T. Then, based on the test productions of blank holder force, 12 typical VBHF curves were applied to perform the simulation tests by the simulation software of DYNAFORM. The simulation test results showed that VBHF had great effects on drawing formability of hot-galvanized sheet steel during the rectangular box drawing. However, the different VBHF curves were applied to control the whole drawing and it would get great different effects. At the same tine, the VBHF had great effects on the maximum thick thinning ratio, but had little effect on the maximum thick incrassation ratio. So, reasonable application of the VBHF would greatly decrease the fractures. When the VBHF profile is taken as curve L, the best effect of drawing formability could be obtained. When curve I is used, contrary effect could be gotten. The other types of curves would cause effects between above two types of VBHF curves. Finally, the actual tests were applied to check the validity of the FEM simulation tests. The results show that the FEM simulation tests are good ways for predicting and optimizing the VBHF.

关键词： Drawing process Variable blank holder force Hot-galvanized sheet steel

Obstacle detection:improved YOLOX-S based on swin transformer-tiny

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Optoelectronics Letters 2023年第11期19卷 698-704页

作者： ZHANG hongying LU Chengjian CHEN Enyao College of Electronic Information and Automation Civil Aviation University of ChinaTianjin300300China

Aiming at the accuracy challenge in obstacle detection for autonomous driving,we propose an improved you only look once X-S(YOLOX-S) model based on swin transformer-tiny YOLOX-S(ST-YOLOX-S) for obstacle detection,which could detect multiple targets,including people,cars,bicycles,motorcycles,and *** method mainly comprises two aspects as *** improve the capability of local feature extraction and then obtain more accurate detection for obstacles under real-world vehicle conditions,the existing backbone of YOLOX-S is replaced with the swin transformer-tiny *** reduced the number of channels between the swin transformer and path aggregation-feature pyramid network(PA-FPN) from [96,192,384,768] to [192,384,768],to decrease the computational cost and then make the swin transformer-tiny more compatible with the ***,on the popular COCO dataset,the proposed ST-YOLOX-S improves the detection mean average precision(mAP) by 6.1% when compared with *** the five types of obstacles that appear in simulated actual vehicle conditions,our ST-YOLOX-S also achieves superior performance compared to ***,our method achieves significant performance over the YOLOv3 on obstacle detection,which shows the effectiveness of the proposed algorithm.

关键词： obstacle network backbone

Algal-bloom control by allelopathy of aquatic macrophytes—A review

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Frontiers of Environmental Science & Engineering 2008年第4期2卷 421-438页

作者： hongying HU Yu HONG Environmental Simulation and Pollution Control State Key Joint Laboratory Department of Environmental Science and EngineeringTsinghua UniversityBeijing 100084China College of Environmental Science and Engineering Beijing Forestry UniversityBeijing 100083China

Algal-bloom control is an important issue for water environment protection as it induces several negative impacts on the lives of aquatic organisms,aquaculture,landscaping,and human *** development of an environment-friendly,cost-effective,and convenient alternative for controlling algal bloom has gained much *** the allelopathy of aquatic macrophytes as a novel and safe method for algal-bloom control is a promising *** paper reviews the development and potential application about allelopathy of aquatic plants on algae,including the allelopathic research history,the potential research problems,the research methodology,and the reported aquatic macrophytes and their inhibitory *** modes of inhibition action of allelochemicals on algae,possible ways for application,and future development directions of research on algal-bloom control by aquatic macrophytes were also presented.

关键词： allelopathy allelochemical aquatic macrophyte algae algal bloom

Effect of Friction on the Drawing Process of Hot-Galvanized Sheet Steel

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Journal of Materials Science & Technology 2005年第4期21卷 531-535页

作者： hongying GONG Wei ZHU Zhiliang ZHANG Zhenliang LOU China National Mold & Die CAD Engineering Research Center Shanghai Jiao Tong University Shanghai 200030 China

A probe test method was employed to detect the friction condition of the interfaces between tools and blank. At the same time a self-developed measurement apparatus to realize the probe test method was also presented. Based on the analysis of force, a correlative friction model was also given. With the self-developed measurement apparatus,the effects of three kinds of lubricating oils which were in common use during the process of sheet steel drawing were studied. By probing the friction coefficient values of different lubricating oils during the drawing process of the hot-galvanized sheet steel （steel brand： ST07Zn）, we can see that the friction caused by PK oil was the lowest, so the effect of PK oil was the best. Then PK oil was used as the base lubricating oil and some solid additive powers was added into it to make a new type lubrication （named as L oil）.The result of test proved that the new lubricating oil had remarkable effect on the drawing process of hot-galvanized sheet steel.

关键词： Drawing process Friction Probe test method Hot-galvanlzed sheet steel

Utility function of TCP Reno under precise end-to-end drop probability

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Science China(Information Sciences) 2013年第1期56卷 230-235页

作者： LIU Ying LI He LIU hongying Institute for Network Sciences and Cyberspace Tsinghua University State Key Laboratory of Software Development Environment Beihang University School of Mathematics and Systems Science Beihang University

TCP Reno can be regarded as a distributed algorithm over the Internet to maximize aggregate utility subject to *** equilibrium reached by the interaction of many competing TCPs,each implemented only on the source and destination computers,is effectively maximizing an objective function for the entire *** this paper,a new utility function is derived for TCP Reno under the precise end-to-end drop *** results show theoretically that the TCP Reno model proposed by Kelly [1] is *** simulation results are provided.

关键词： TCP Reno utility function end-to-end drop probability

Enhancement of thermophilic anaerobic digestion of thickened waste activated sludge by combined microwave and alkaline pretreatment

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Journal of Environmental Sciences 2011年第8期23卷 1257-1265页

作者： Yongzhi Chi Yuyou Li Xuening Fei ShaopoWang hongying Yuan Tianjin Key laboratory of Aquatic Science and Technology Department of Environmental and Municipal Engineering Tianjin Institute of UrbanConstruction Tianjin 300384 China. Department of Environmental Science Graduate School of Environmental Studies Tohoku University Sendai 980-8579 Japan

Pretreatment of thickened waste activated sludge （TWAS） by combined microwave and alkaline pretreatment （MAP） was studied to improve thermophilic anaerobic digestion efficiency. Uniform design was applied to determine the combination of target temperature （110-210°C）, microwave holding time （1-51 min）, and NaOH dose （0-2.5 g NaOH/g suspended solids （SS）） in terms of their effect on volatile suspended solids （VSS） solubilization. Maximum solubilization ratio （85.1%） of VSS was observed at 210°C with 0.2 g-NaOH/g-SS and 35 min holding time. The effects of 12 different pretreatment methods were investigated in 28 thermophilic batch reactors by monitoring cumulative methane production （CMP）. Improvements in methane production in the TWAS were directly related to the microwave and alkaline pretreatment of the sludge. The highest CMP was a 27% improvement over the control. In spite of the increase in soluble chemical oxygen demand concentration and the decrease in dewaterability of digested sludge, a semi-continuous thermophilic reactor fed with pretreated TWAS without neutralization （at 170~C with 1 min holding time and 0.05 g NaOH/g SS） was stable and functioned well, with volatile solid （VS） and total chemical oxygen demand （TCOD） reductions of 28% and 18%, respectively, which were higher than those of the control system. Additionally, methane yields （L@STP/g-CODaded, at standard temperature and pressure （STP） conditions of 0°C and 101.325 kPa） and （L@STP/g VSadad） increased by 17% and 13%, respectively, comoared to the control reactor.

关键词： thickened waste activated sludge microwave pretreatment alkaline pretreatment thermophilic anaerobic digestion

Ultra-deep desulfurization by reactive adsorption desulfurization on copper-based catalysts

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Journal of Energy Chemistry 2019年第2期28卷 8-16页

作者： Yaqing Liu hongying Wang Jinchong Zhao Yunqi Liu Chenguang Liu State Key Laboratory of Heavy Oil Processing Key Laboratory of CatalysisChina National Petroleum Corporation (CNPC)China University of Petroleum

In this paper,a novel copper-based catalyst for FCC gasoline improving the ability of removal the sulfur and avoiding the loss of the octane number from olefin saturation by reactive adsorption desulfurization(RADS) was *** series of Cu/Zn O-Al_2 O_3 catalysts were characterized by X-ray powder diffraction(XRD),N_2 adsorption analysis and temperature-programmed reduction(TPR) studies,X-ray photoelectron spectroscopy(XPS),scanning electron microscope(SEM) and transmission electron microscopy(TEM).The experiment results showed that the catalysts had an optimum desulfurization ability with copper loading 6 wt%,which the sulfur contents of product decreased less than 10 μg/g and olefin contents decreased from 16.19% to 14.14% for the long period *** appropriate Cu loading content could lead to the high active and low apparent activation energy(E_a).Therefore,the Cu-based catalyst may become a novel catalyst for second-generation for reactive adsorption desulfurization,which achieves the high desulfurization active and low olefins saturation to satisfy the upgrading the product.

关键词： Cu/ZnO-Al2O3 Desulfurization activity Octane number Olefins saturation Stability