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Toughness for Fractional (2, b, k)-Critical Covered Graphs

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Journal of the Operations Research Society of China 2023年第1期11卷 197-205页

作者： su-fang wang Wei Zhang School of Public Management Jiangsu University of Science and TechnologyZhenjiang212100JiangsuChina Oujiang College Wenzhou UniversityWenzhou325035ZhejiangChina

Let h:E(G)→[0,1]be a *** a≤∑e∋xh(e)≤b holds for each x∈V(G),then we call G[Fh]a fractional[a,b]-factor of G with indicator function h,where Fh={e:e∈E(G),h(e)>0}.A graph G is called a fractional[a,b]-covered graph if for every edge e of G,there is a fractional[a,b]-factor G[Fh]with h(e)=***,Xu and sun[***,***,***,Degree conditions for fractional(a,b,k)-critical covered graphs,Information Processing Letters 152(2019)105838]defined the concept of a fractional(a,b,k)-critical covered graph,i.e.,for every vertex subset Q with|Q|=k of G,G−Q is a fractional[a,b]-covered *** this article,we study the problem of a fractional(2,b,k)-critical covered graph,and verify that a graph G withδ(G)≥3+k is a fractional(2,b,k)-critical covered graph if its toughness t(G)≥1+1b+k2b,where b and k are two nonnegative integers with b≥2+k2.

关键词： Graph Toughness Fractional[a,b]-factor Fractional[a,b]-covered graph Fractional(a,b,k)-critical

A mitochondria targeting Ir(Ⅲ)complex triggers ferroptosis and autophagy for cancer therapy:A case of aggregation enhanced PDT strategy for metal complexes

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Chinese Chemical Letters 2025年第1期36卷 374-380页

作者： Panpan wang Hongbao fang Mengmeng wang Guandong Zhang Na Xu Yan su Hongke Liu Zhi su Jiangsu Collaborative Innovation Center of Biomedical Functional Materials College of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

Metal complexes hold significant promise in tumor diagnosis and ***,their potential applications in photodynamic therapy(PDT)are hindered by issues such as poor photostability,low yield of reactive oxygen species(ROS),and aggregation-induced ROS *** address these challenges,we present a molecular self-assembly strategy utilizing aggregation-induced emission(AIE)conjugates for metal *** a proof of concept,we synthesized a mitochondrial-targeting cyclometalated Ir(Ⅲ)photosensitizer *** approach significantly enhances the photodynamic effect while mitigating the dark toxicity associated with AIE ***-TPE readily self-assembles into nanoaggregates in aqueous solution,leading to a significant production of ROS upon light *** Ir-TPE triggers multiple modes of death by excessively accumulating ROS in the mitochondria,resulting in mitochondrial DNA *** damage can lead to ferroptosis and autophagy,two forms of cell death that are highly cytotoxic to cancer *** aggregation-enhanced photodynamic effect of Ir-TPE significantly enhances the production of ROS,leading to a more pronounced cytotoxic *** vitro and in vivo experiments demonstrate this aggregation-enhanced PDT approach achieves effective in situ tumor *** study not only addresses the limitations of metal complexes in terms of low ROS production due to aggregation but also highlights the potential of this strategy for enhancing ROS production in PDT.

关键词： Metal complex AIEgens Mitochondria targeting Enhanced photodynamic therapy Anticancer agent

Stable partial nitrification was achieved for nitrogen removal from municipal wastewater by gel immobilization:A pilot-scale study

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Journal of Environmental Sciences 2025年第5期151卷 529-539页

作者： Xin Hu Hong Yang Xiaoyue fang Xuyan Liu Jiawei wang Xiaotong wang Yongsheng Bai Bojun su Key Laboratory of Beijing for Water Quality Science and Water Environmental Recovery Engineering Faculty of ArchitectureCivil and Transportation EngineeringBeijing University of TechnologyBeijing 100124China Beijing General Municipal Engineering Design&Research Institute Co. Ltd.Beijing 100044China Hebei GEO University Shijiazhuang 050031China Hebei Key Laboratory of Water Quality Engineering and Comprehensive Utilization of Water Resources Hebei University of ArchitectureZhangjiakou 075000China School of Environmental Science and Safety Engineering Tianjin University of TechnologyTianjin 300384China Beijing Drainage Group Co.Ltd. Beijing 100022China

As an energy and carbon saving process for nitrogen removal from wastewater,the partial nitrification and denitrification process(PN/D)has been extensively ***,achieving stable PNinmunicipalwastewater has always been *** this study,a gel immobilized PN/D nitrogen removal process(GI-PN/D)was established.A 94 days pilot-scale experiment was conducted using real municipal wastewater with an ammonia concentration of 43.5±5.3mg N/L at a temperature range of 11.3–28.7◦*** nitrogen removal performance and associated pathways,shifts in the microbial community as well as sludge yield were *** results were as follows:the effluent TN and COD were 0.6±0.4mg/L and 31.1±3.8 mg/L respectively,and the NAR exceeding 95%.GI-PN/D achieved deep nitrogen removal ofmunicipalwastewater through stable PN without taking any *** primary pathways for nitrogen removal were identified as denitrification,simultaneous nitrification-denitrification,and aerobic ***-throughput sequencing analysis revealed that the immobilized fillers facilitated the autonomous enrichment of functional bacteria in each reactor,effectively promoting the dominance and stability of the microbial *** addition,GI-PN/D had the characteristic of low sludge yield,with an average sludge yield of 0.029 kg SS/kg *** study provides an effective technical for nitrogen removal from municipal wastewater through PN.

关键词： Gel immobilization Partial nitrification Deep nitrogen removal Autonomous enrichment Sludge yield

Transparent Image Watermarking in the Wavelet Domain

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Wuhan University Journal of Natural Sciences 2000年第4期5卷 457-460页

作者： Chen Qing, su Xiang-fang, wang Yan-ping College of Electronic Information, Wuhan University, Wuhan 430072, China College of Electronic Information Wuhan University Wuhan China

Digital watermarking has been proposed as a viable solution to protect the copyright of multimedia data in a networked environment, since it makes possible to embed identification codes into a digital document. This paper proposes a new scheme for image watermarking in which a watermark is embedded in a selected set of wavelet transform coefficients. To ensure the watermark invisibility with high robustness, a binary pseudo-random sequence is embedded into significant wavelet coefficients by exploiting Embedded Zerotree Wavelet (EZW) coding algorithm. Experimental results show the effectiveness of this technique.

关键词： wavelets digital watermarking copyright protection

An Improved YOLOv7 Tiny Algorithm for Vehicle and Pedestrian Detection with Occlusion in Autonomous Driving

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Chinese Journal of Electronics 2025年第1期34卷 282-294页

作者： Jian su fang wang Wei Zhuang Nanjing University of Information Science and Technology

Future transportation is advancing in the direction of intelligent transportation systems, where an essential part is vehicle and pedestrian detection. Due to the complex urban traffic environment, vehicles and pedestrians in road monitoring have different forms of occlusion problems, resulting in the missed detection of objects. We design an improved you only look once version 7(YOLOv7) tiny algorithm for vehicle and pedestrian detection under occlusion, with the following four main improvements. In order to locate the object more accurately, 1 × 1 convolution and identity connection are added to the 3 × 3 convolution, and convolution reparameterization is used to enhance the inference speed of the network model. In view of the complex road background and more interference, the coordinate attention was added to the connection part of backbone and neck to enhance the network's capacity to detect the object and lessen interference from other targets. At the same time, before being sent to the detection head, global attention mechanism is added to improve the accuracy of model detection by capturing three-dimensional features. Considering the issue of imbalanced training samples, we propose focal complete intersection over union(CIOU) loss instead of CIOU loss to become the bounding box regression loss, so that the regression process attention to high-quality anchor boxes. Experiments show that the improved YOLOv7 tiny algorithm achieves 82.2% map@ 0.5 in pattern analysis, statistical modelling and computational learning visual object classes dataset, which is 2.8% higher than before the improvement. The performance of map @ 0.5:0.95 is 5.2% better than the previous improvement. The proposed improved algorithm can availably to detect partial occlusion objects.

关键词： Training Pedestrians Attention mechanisms Convolution Roads Transportation Object detection Interference Inference algorithms Autonomous vehicles

CATALYSIS OF METALLO-PORPHYRINS IN OXIDATION OF P-NITROTOLUENE BY ELECTRO-GENEEATED suPEROXIDE ION

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Chinese Chemical Letters 1992年第7期3卷 499-502页

作者： su fang wang Hong Sheng LU suo Bo ZHANG Yin Jie LIN Ying Kai XU Department of chemistry Jilin University.The National Laboratory of Enzyme Engineering.Changchun130023

The oxidation of pnitrotoluene with electro-generated superoxide ion in the presence or absence of metallo-porphyrins FeTPP, MnTPP and CoTPP in DMF was studied by cyclic voltammetry and controlled potential electrolysis, Metallo-porphyrins as catalysts for electroreduction of O_2, they can not only increase yields of p-nitrobensoic acid and selectivities of reaction but also enable the reaction proceed at lower negative potential.

关键词： TPP CATALYSIS OF METALLO-PORPHYRINS IN OXIDATION OF P-NITROTOLUENE BY ELECTRO-GENEEATED suPEROXIDE ION 台五

Multi-Scenario Probabilistic Load Flow Calculation Considering Wind Speed Correlation

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Energy Engineering 2025年第2期122卷 667-680页

作者： Xueqian wang Hongsheng su School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

As the proportion of newenergy increases,the traditional cumulant method(CM)produces significant errorswhen performing probabilistic load flow(PLF)calculations with large-scale wind power *** the wind speed correlation,a multi-scenario PLF calculation method that combines random sampling and segmented discrete wind farm power was ***,based on constructing discrete scenes of wind farms,the Nataf transform is used to handle the correlation between wind ***,the random sampling method determines the output probability of discrete wind power scenarios when wind speed exhibits ***,the PLF calculation results of each scenario areweighted and superimposed following the total probability formula to obtain the final power flow calculation *** in the IEEE standard node system,the absolute percent error(APE)for the mean and standard deviation(SD)of the node voltages and branch active power are all within 1%,and the average root mean square(AMSR)values of the probability curves are all less than 1%.

关键词： Wind speed correlation probabilistic load flow multi-scenario piecewise cumulant method

Impact of dietary nutrition regimens based on body composition analysis on bone metabolism in Alzheimer’s disease patients

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World Journal of Psychiatry 2025年第2期15卷 59-68页

作者： Xue-Lian wang Yi-Ran Zhao Ying Yu Zhi-fang Mao su-Xian Tan Shan-Shan Yu Department of Clinical Nutrition The Third Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Rehabilitation Treatment Group The Third Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Geriatrics The Third Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Rehabilitation Medicine The Third Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Psychiatry The Third Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina Department of Geriatric Psychiatry The Third Hospital of QuzhouQuzhou 324000Zhejiang ProvinceChina

BACKGROUND Body composition analysis(BCA)is primarily used in the management of conditions such as obesity and endocrine ***,its potential in providing nutritional guidance for patients with Alzheimer’s disease(AD)remains relatively *** To explore the clinical efficacy of BCA-based dietary nutrition scheme on bone metabolism in AD *** This retrospective study included 96 patients with AD complicated by osteoporosis who were admitted to The Third Hospital of Quzhou between January 2023 and December *** on data from previous similar studies,the patients were randomly assigned to either a routine diet(RD)group(n=48)or a personalized nutrition(PN)group(n=48).The RD group received conventional dietary guidance,while the PN group received individualized diet intervention measures based on human *** intervention period lasted for 12 *** mineral density(BMD),body mass index(BMI),muscle mass,mineral content,osteocalcin,25-hydroxyvitamin D,procollagen type I N-terminal propeptide(PINP),beta C-terminal telopeptide of type I collagen(β-CTX),and serum calcium were measured and compared between the two groups before and 12 weeks after the *** No significant differences were observed between groups in terms of age,sex,height,BMI,or other baseline data(P>0.05).In both groups,BMI did not show significant changes after the intervention(P>0.05),whereas muscle mass and mineral content were significantly increased(P-1 compared to the RD group(P<0.05).The mini-mental state examination(MMSE)score was similar in both groups before the ***,12 weeks after the intervention,the MMSE score in the PN group was significantly higher than

关键词： Alzheimer’s disease Bone metabolism disorders Human body composition analysis Dietary nutrition Bone homeostasis Dietary management

Preparation and applications of calcium ferrite as a functional material:A review

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 292-310页

作者： Xiuli Han Bowen Duan Lei Liu Shilong fang Weiwei wang College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources of Hebei Province Tangshan 063210China Key Laboratory of Mining Development and Security Technology of Hebei Province Tangshan 063210China

Calcium ferrite(CF)is recognized as a potential green and efficient functional material because of its advantages of magnetism,electrochemistry,catalysis,and biocompatibility in the fields of materials chemistry,environmental engineering,and ***-fore,the obtained research results need to be systematically summarized,and new perspectives on CF and its composite materials need to be *** on the presented studies of CF and its composite materials,the types and structures of the crystal are *** addition,the current application technologies and theoretical mechanisms with various properties in different fields are ***,the various preparation methods of CF and its composite materials are elaborated in *** importantly,the advantages and disadvantages of the synthesis methods of CF and its composite materials are discussed,and the existing problems and emerging challenges in practical production are ***,the key future research directions of CF and its composite materials have been prospected from the potential application technologies to provide references for its synthesis and efficient utilization.

关键词： calcium ferrite mineral functional materials preparation application perspectives