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An Improved Spectral Analysis Method for Fatigue Damage Assessment of Details in Liquid Cargo Tanks

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China Ocean Engineering 2018年第1期32卷 62-73页

作者： ZHAO peng-yuan HUANG xiao-ping Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration Shanghai Jiao Tong University

Errors will be caused in calculating the fatigue damages of details in liquid cargo tanks by using the traditional spectral analysis method which is based on linear system, for the nonlinear relationship between the dynamic stress and the ship acceleration. An improved spectral analysis method for the assessment of the fatigue damage in detail of a liquid cargo tank is proposed in this paper. Based on assumptions that the wave process can be simulated by summing the sinusoidal waves in different frequencies and the stress process can be simulated by summing the stress processes induced by these sinusoidal waves, the stress power spectral density(PSD) is calculated by expanding the stress processes induced by the sinusoidal waves into Fourier series and adding the amplitudes of each harmonic component with the same frequency. This analysis method can take the nonlinear relationship into consideration and the fatigue damage is then calculated based on the PSD of stress. Take an independent tank in an LNG carrier for example, the accuracy of the improved spectral analysis method is proved much better than that of the traditional spectral analysis method by comparing the calculated damage results with the results calculated by the time domain method. The proposed spectral analysis method is more accurate in calculating the fatigue damages in detail of ship liquid cargo tanks.

关键词： liquid cargo tank nonlinear system fatigue damage spectral analysis method dynamic pressure

Novel combinatorial algorithm for the problems of fuzzy grey multi-attribute group decision making

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Journal of Systems Engineering and Electronics 2007年第4期18卷 774-780页

作者： Rao Congjun xiao Xinping peng Jin Coll. of Mathematics and Information Science Huanggang Normal Univ. Huanggang 438000 P. R. China School of Science Wuhan Univ. of Technology Wuhan 430063 P. R. China

To study the fuzzy and grey information in the problems of multi-attribute group decision making, the basic concepts of both fuzzy grey numbers and grey interval numbers are given firstly, then a new model of fuzzy grey multi-attribute group decision making based on the theories of fuzzy mathematics and grey system is presented. Furthermore, the grey interval relative degree and deviation degree is defined, and both the optimistic algorithm of the grey interval relational degree and the algorithm of deviation degree minimization for solving this new model are also given. Finally, a decision making example to demonstrate the feasibility and rationality of this new method is given, and the results by using these two algorithms are uniform.

关键词： multi-attribute group decision making fuzzy grey number grey interval relational degree deviation degree

Video Polyp Segmentation: A Deep Learning Perspective

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Machine Intelligence Research 2022年第6期19卷 531-549页

作者： Ge-peng Ji Guobao xiao Yu-Cheng Chou deng-Ping Fan Kai Zhao Geng Chen Luc Van Gool Research School of Engineering Australian National UniversityCanberra 2601Australia College of Computer and Control Engineering Minjiang UniversityFuzhou 350108China Department of Computer Science Johns Hopkins UniversityBaltimore 21218USA Computer Vision Laboratory ETH ZürichZürich 8092Switzerland Department of Radiological Sciences University of CaliforniaLos Angeles 90095USA School of Computer Science and Engineering Northwestern Polytechnical UniversityXi′an 710072China

We present the first comprehensive video polyp segmentation(VPS)study in the deep learning *** the years,developments in VPS are not moving forward with ease due to the lack of a large-scale dataset with fine-grained segmentation *** address this issue,we first introduce a high-quality frame-by-frame annotated VPS dataset,named SUN-SEG,which contains 158690colonoscopy video frames from the well-known *** provide additional annotation covering diverse types,i.e.,attribute,object mask,boundary,scribble,and ***,we design a simple but efficient baseline,named PNS+,which consists of a global encoder,a local encoder,and normalized self-attention(NS)*** global and local encoders receive an anchor frame and multiple successive frames to extract long-term and short-term spatial-temporal representations,which are then progressively refined by two NS *** experiments show that PNS+achieves the best performance and real-time inference speed(170 fps),making it a promising solution for the VPS ***,we extensively evaluate 13 representative polyp/object segmentation models on our SUN-SEG dataset and provide attribute-based ***,we discuss several open issues and suggest possible research directions for the VPS *** project and dataset are publicly available at https://***/GewelsJI/VPS.

关键词： Video polyp segmentation(VPS) dataset self-attention colonoscopy abdomen

Physical and emulsifying properties of pea protein:influence of combined physical modification by flaxseed gum and ultrasonic treatment

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Food Science and Human Wellness 2023年第2期12卷 431-441页

作者： Jia Yang Fenghong Huang Qingde Huang Da Ma Yashu Chen dengfeng peng xiao Yu Qianchun deng Fang Geng Oil Crops Research Institute Hubei Key Laboratory of Lipid Chemistry and Nutritionand Key Laboratory of Oilseeds ProcessingMinistry of AgricultureChinese Academy of Agricultural ScienceWuhan 430062China College of Packaging Engineering Jinan UniversityZhuhai 519070China College of Food and Biological Engineering Henan Collaborative Innovation Center for Food Production and SafetyHenan Key Laboratory of Cold Chain Food Quality and Safety ControlZhengzhou University of Light IndustryZhengzhou 450002China Key Laboratory of Coarse Cereal Processing(Ministry of Agriculture and Rural Affairs) School of Food and Biological EngineeringChengdu UniversityChengdu 610106China

This study characterized and compared the physical and emulsifying properties of pea protein(PP)and its modified proteins(ultrasound treated-PP(PPU),flaxseed gum(FG)treated PP(PPFG)and ultrasound treated-PPFG(PPFGU)).The results showed FG triggered the formation of loosely attached complex with PP via physical modification under gentle magnetic stirring at pH 7.0,while ultrasound played an important role in reducing protein size,increasing surface hydrophobicity and molecular fluidity onto oil-water *** ultrasound further enhanced the interaction of PP with FG,and produced the PPFGU complex with smaller droplet size,higherζ-potential and lower ***,combination of FG and ultrasound improved the physical properties of PP with higher viscosity,stiffer gels(defined as higher elastic modulus),stronger hydrophobic properties,better thermal stability,and fast protein absorption ***,the PPFGU coarse emulsion performed highest emulsifying activity index(EAI)and emulsion stability index(ESI)that the stabilized nanoemulsion obtained smallest droplet size,higherζ-potential,and longest storage *** combination of FG and ultrasonic treatment will be an effective approach to improving the emulsifying property and thermal stability of PP,which can be considered as a potential plant-based emulsifier applied in the food industry.

关键词： Pea protein Flaxseed gum Ultrasonic treatment Emulsifying properties Physical properties

Macular Perfusion Changes and Ganglion Cell Complex Loss in Patients with Silicone Oil-related Visual Loss

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Biomedical and Environmental Sciences 2020年第3期33卷 151-157页

作者： MA Ya ZHU xiao Qing peng xiao Yan Beijing Institute of Ophthalmology Beijing Tongren Eye CenterBeijing Ophthalmology and Visual Science Key LabBeijing Tongren HospitalCapital Medical UniversityBeijing 100730China Beijing Tongren Eye Center Beijing Ophthalmology and Visual Science Key LabBeijing Tongren HospitalCapital Medical UniversityBeijing 100730China

Objective The aim of this study was to investigate macular perfusion changes and ganglion cell complex(GCC)loss in patients with unexplained visual loss following vitrectomy and silicone oil(SO)tamponade,and to evaluate the correlation between retinal blood flow and GCC loss using optical coherence tomography angiography(OCTA)and optical coherence tomography(OCT).Methods This retrospective study included seven eyes(seven patients)with unexpected visual loss after vitrectomy and SO *** was used to evaluate the alterations in retinal vessel density(VD)in the superficial capillary plexus(SCP),deep capillary plexus(DCP),and radial peripapillary capillary plexus(RPCP).OCT was used to measure the thickness of GCC and retinal nerve fiber layer(RNFL).Medical records of patients were *** Quantitative analysis of OCTA images revealed a significant reduction in SCP VD in the affected eyes compared with the controls(all sections P<0.05).No difference was found in GCC thickness,but FLV(focal loss volume)and GLV(global loss volume)were significantly higher in the affected eyes(both P<0.001).SCP VD was inversely correlated with FLV and *** Silicone oil-related severe visual loss was associated with superficial retinal microvasculature damage and ganglion cell apoptosis.

关键词： Silicone oil Visual loss Optical coherence tomography angiography Ganglion cell complex

Infectious Behavior in Photo-oxidation of Polymers

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Chinese Journal of Polymer Science 2020年第3期38卷 248-256,I0006页

作者： Xuan Liu xiao-peng Ren Rui Yang Department of Chemical Engineering Tsinghua University

When a polymer is used together with others,its aging process will be affected by the adjacent *** infectious behavior between polymers makes the aging process more complex than that of an individual *** this study,infectious behavior in photooxidation of polymers was ***(PPs),an unstabilized PP and a commercial PP,were chosen as the infection *** typical polymers,high density polyethylene(HDPE),low density polyethylene(LDPE),polystyrene(PS),polycarbonate(PC),poly(ethylene terephthalate)(PET),and polyamide 6(PA6),were used as the *** degree of oxidation of the targets was evaluated by attenuated total reflection-Fourier transform infrared spectroscopy(ATR-FTIR).An accelerating effect of two infection sources on the photo-oxidation of the target polymers was *** infectious agents from the infection sources were detected by pyrolysis-gas chromatography-mass spectrometry(Py-GC-MS)and gas chromatography(GC).The acceleration effect of two main infectious agents,*** and acetic acid,on the photo-oxidation of the commercial PP was *** infectious effect of the infection source on the target polymer was considered to be a comprehensive result of the effects of a variety of infectious agents.

关键词： Photo-oxidation Infection source Infectious agent Polypropylene

Recovery of Ni(Ⅱ)from real electroplating wastewater using fixed-bed resin adsorption and subsequent electrodeposition

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Frontiers of Environmental Science & Engineering 2019年第6期13卷 115-126页

作者： Tong Li Ke xiao Bo Yang Guilong peng Fenglei Liu Liyan Tao Siyuan Chen Haoran Wei Gang Yu Shubo deng State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing Key Laboratory for Emerging Organic Contaminants ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Department of Environmental Engineering College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060China Department of Chemical and Environmental Engineering Yale UniversityNew HavenCT 06511USA

Effective recovery of high-value heavy metals from electroplating wastewater is of great significance,but recovering nickel ions from real electroplating wastewater as nickel sheet has not been *** this study,the pilot-scale fixed-bed resin adsorption was conducted to recover Ni(Ⅱ)ions from real nickel plating wastewater,and then the concentrated Ni(Ⅱ)ions in the regenerated solution were reduced to nickel sheet via electrodeposition.A commercial cation-exchange resin was selected and the optimal resin adsorption and regeneration conditions were *** resin exhibited an adsorption capacity of 63 mg/g for Ni(Ⅱ)ions,and the average amount of treated water was 84.6 bed volumes(BV)in the pilot-scale *** the adsorption by two ion-exchange resin columns in series and one chelating resin column,the concentrations of Ni(Ⅱ)in the treated wastewater were below 0.1 mg/*** the regeneration of the spent resin using 3 BVof 4%(w/w)HC1 solution,1.5 BV of concentrated neutral nickel solution(>30 g/L)was obtained and used in the subsequent electrodeposition *** the aeration method,alkali and water required in resin activation process were greatly reduced to 2 BV and 3 BV,*** the optimal electrodeposition conditions,95.6%of Ni(Ⅱ)in desorption eluent could be recovered as the elemental nickel on the cathode,llie total treatment cost for the resin adsorption and regeneration as well as the electrodeposition was calculated.

关键词： Nickel removal Ion exchange Electroplating wastewater Regeneration Electrodeposition

miR-136-5p调控IL-17诱导大鼠星形胶质细胞炎症反应

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广东医学 2018年第15期39卷 2274-2278页

作者：何基琛宗少晖曾高峰彭小明邓贵营高云兵广西医科大学第一附属医院脊柱骨病外科广西南宁530021 广西医科大学公共卫生学院广西南宁530021

目的探讨miR-136-5p靶向NF-κB/A20调控白细胞介素(IL)-17诱导星形胶质细胞炎症反应的研究。方法体外培养SD大鼠原代星形胶质细胞,免疫荧光染色鉴定。构建miR-136-5p过表达及表达抑制的重组慢病毒载体并转染细胞,荧光显微镜下观察并计... 详细信息

目的探讨miR-136-5p靶向NF-κB/A20调控白细胞介素(IL)-17诱导星形胶质细胞炎症反应的研究。方法体外培养SD大鼠原代星形胶质细胞,免疫荧光染色鉴定。构建miR-136-5p过表达及表达抑制的重组慢病毒载体并转染细胞,荧光显微镜下观察并计算转染效率。Real-time PCR及抗体芯片检测IL-17刺激后各组(阴性组:转染LV-ctrl病毒、过表达组:转染LV-miR-136-5p病毒、抑制组:转染LV-miR-136-5p-inhibition病毒)大鼠星形胶质细胞炎性和趋化因子[白细胞介素-1β(IL-1β)、IL-6、肿瘤坏死因子-α(TNF-α)、巨噬细胞炎性蛋白2(MIP-2)、单核细胞趋化蛋白1(MCP-1)]的相对表达情况。Western blot检测p-NF-κB、A20蛋白的相对表达水平。结果与阴性组相比,过表达组细胞炎性和趋化因子的mRNA和蛋白表达增加,A20蛋白表达减少,p-NF-κB蛋白表达增加,同时,抑制组的测定结果与之相反。结论 miR-136-5p能够通过NF-κB/A20信号通路来促进IL-17诱导的星形胶质细胞产生上述炎性和趋化因子。

关键词：星形胶质细胞 miRNA NF-κB/A20信号通路炎性因子和趋化因子

Calibrating the linearity between grayscale and element content for X-ray KES imaging of alloys

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Nuclear Science and Techniques 2022年第1期33卷 1-12页

作者： xiao-Lu Ju Biao deng Ke Li Fu-Cheng Yu Hai-peng Zhang Ming-Wei Xu Guo-Hao Du Hong-Lan Xie Bin Li Ti-Qiao xiao Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China University of Chinese Academy of Sciences Beijing 100049China

Doped elements in alloys significantly impact their *** methods usually sputter the surface material of the sample,or their performance is limited to the surface of alloys owing to their poor penetration *** X-ray K-edge subtraction(KES)method exhibits great potential for the nondestructive in situ detection of element contents in ***,the signal of doped elements usually deteriorates because of the strong absorption of the principal component and scattering of crystal *** in turn prevents the extensive application of X-ray KES imaging to *** this study,methods were developed to calibrate the linearity between the grayscale of the KES image and element *** methods were aimed at the sensitive analysis of elements in ***,experiments with phantoms and alloys demonstrated that,after elaborate calibration,X-ray KES imaging is capable of nondestructive and sensitive analysis of doped elements in alloys.

关键词： X-ray KES imaging Grayscale calibration Element analysis for alloy Nondestructive imaging of elements