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考虑产能需求方交期和价格敏感的产能分享平台定价策略

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控制与决策 2024年第2期39卷 625-632页

作者：赵道致冯慧中天津大学管理与经济学部天津300072

基于双边市场理论,考虑产能分享双边市场具有网络外部性特性,同时考虑产能需求方对加工交期和价格敏感,研究垄断型制造业产能分享平台的定价策略.首先,建立平台和双边用户的两阶段决策模型;然后,通过计算求解探索了注册费和交易费收费... 详细信息

基于双边市场理论,考虑产能分享双边市场具有网络外部性特性,同时考虑产能需求方对加工交期和价格敏感,研究垄断型制造业产能分享平台的定价策略.首先,建立平台和双边用户的两阶段决策模型;然后,通过计算求解探索了注册费和交易费收费模式下的平台均衡利润,并分析了交叉网络外部性等外生变量对各方决策和平台利润的影响.研究发现:注册费模式下的平台均衡利润大于固定交易费模式下的平台均衡利润;两种定价模式下的平台利润与双边用户的网络外部性均正相关,与产能需求方的交期预期偏差均负相关,与产能需求方的产能价格预期均正相关;产能需求方的交期敏感度在实际交期早于或晚于预期交期时对平台利润有不同影响,产能需求方的产能价格敏感度在产能实际价格低于或高于预期价格时对平台利润也有不同影响.

关键词：产能分享平台定价双边平台交期敏感价格敏感平台利润

Sarcopenia adversely impacts clinical outcomes in patients undergoing pancreaticoduodenectomy: A systematic review and meta-analysis

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1857-1870页

作者： Qi-hui Zhang Jin-Dong Ma Yan-Min Lu Run-Nan Zhang {1.-Hua Zhao Ya-Tong Li Qiang-Pu Chen Department of Clinical Nutrition Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina Department of Hepatobiliary Surgery Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina

BACKGROUND Sarcopenia is a syndrome marked by a gradual and widespread reduction in skeletal muscle mass and strength,as well as a decline in functional ability,which is associated with malnutrition,hormonal changes,chronic inflammation,distur-bance of intestinal flora,and exercise *** is a com-monly employed clinical intervention for conditions such as pancreatic head cancer,ampulla of Vater cancer,and cholangiocarcinoma,among others,with a notably high rate of postoperative *** is frequent in patients undergoing ***,data regarding the effects of sarcopenia in patients undergoing pancreaticoduodenectomy(PD)are both limited and *** PubMed,Cochrane Library,Web of Science,and Embase databases were screened for studies published from the time of database inception to June 2023 that described the effects of sarcopenia on the outcomes and complications of *** researchers independently assessed the quality of the data extracted from the studies that met the inclusion ***-analysis using RevMan 5.3.5 and Stata 1..0 software was *** and funnel plots were used,respectively,to demonstrate the outcomes of the sarcopenia group vs the non-sarcopenia group after PD and to evaluate potential publication *** Sixteen studies encompassing 2381.patients were included in the *** patients in the sarcopenia group(n=833)had higher overall postoperative complication rates[odds ratio(OR)=3.42,95%confidence interval(CI):1.95-5.99,P1.,higher Clavien-Dindo class≥Ⅲ major complication rates(OR=1.41.95%CI:1.04-1.90,P=0.03),higher bacteremia rates(OR=4.46,95%CI:1.42-1..98,P=0.01.,higher pneumonia rates(OR=2.1.,95%CI:1.34-3.27,P=0.001.,higher pancreatic fistula rates(OR=1.42,95%CI:1.1.-1.79,P=0.003),longer hospital stays(OR=2.86,95%CI:0.44-5.28,P=0.02),higher mortality rates(OR=3.1.,95%CI:1.55-6.50,P=0.002),and worse overall survival(hazard ratio=2.81.95%CI:1.4

关键词： Pancreaticoduodenectomy Sarcopenia Postoperative complications Length of stay Meta-analysis

A Lightweight Network with Dual Encoder and Cross Feature Fusion for Cement Pavement Crack Detection

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 255-273页

作者： zhong Qu Guoqing Mu Bin Yuan School of Computer Science and Technology Chongqing University of Posts and TelecommunicationsChongqing400065China School of Software Engineering Chongqing University of Posts and TelecommunicationsChongqing400065China

Automatic crack detection of cement pavement chiefly benefits from the rapid development of deep learning,with convolutional neural networks(CNN)playing an important role in this ***,as the performance of crack detection in cement pavement improves,the depth and width of the network structure are significantly increased,which necessitates more computing power and storage *** limitation hampers the practical implementation of crack detection models on various platforms,particularly portable devices like small mobile *** solve these problems,we propose a dual-encoder-based network architecture that focuses on extracting more comprehensive fracture feature information and combines cross-fusion modules and coordinated attention mechanisms formore efficient feature ***,we use small channel convolution to construct shallow feature extractionmodule(SFEM)to extract low-level feature information of cracks in cement pavement images,in order to obtainmore information about cracks in the shallowfeatures of *** addition,we construct large kernel atrous convolution(LKAC)to enhance crack information,which incorporates coordination attention mechanism for non-crack information filtering,and large kernel atrous convolution with different cores,using different receptive fields to extract more detailed edge and context ***,the three-stage feature map outputs from the shallow feature extraction module is cross-fused with the two-stage feature map outputs from the large kernel atrous convolution module,and the shallow feature and detailed edge feature are fully fused to obtain the final crack prediction *** evaluate our method on three public crack datasets:DeepCrack,CFD,and *** results on theDeepCrack dataset demonstrate the effectiveness of our proposed method compared to state-of-the-art crack detection methods,which achieves Precision(P)87.2%,Recall(R)87.7%,and F-score(F1.87.4%.Thanks to our lightweight cr

关键词： Shallow feature extraction module large kernel atrous convolution dual encoder lightweight network crack detection

Doping-induced charge transfer in conductive polymers

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Chinese Chemical Letters 2024年第1期35卷 45-51页

作者： Siyi Luo Zhen Xu Fei zhong {1. Li Lidong Chen State Key Laboratory of High Performance Ceramics and Superfine Microstructures Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Molecular doping has become a widely used method to modulate the electric performance of organic semiconductors(OSC).Highly effective charge transfer during molecular doping is desired to achieve ideal electrical *** types of charge transfer mechanisms are widely accepted in molecular doping process:integer charge transfer(ICT)and charge transfer complex(CTC).In this review,fundamental principles of two mechanisms are revisited and the characterization methods are *** key points for the formation of two mechanisms are highlighted from aspects of molecular structure and process ***,the strategies to improve the proportion of ICT are ***,the challenges and perspectives for future developments in the molecular doping of polymer semiconductors are provided.

关键词： Molecular doping Charge transfer Integer charge transfer Charge transfer complex Conjugated polymer

An object detection approach with residual feature fusion and second-order term attention mechanism

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CAAI Transactions on Intelligence Technology 2024年第2期9卷 411-424页

作者： Cuijin Li zhong Qu Shengye Wang College of Computer Science and Technology Chongqing University of Posts and TelecommunicationsChongqingChina College of Electronic Information Chongqing Institute of EngineeringChongqingChina

Automatically detecting and locating remote occlusion small objects from the images of complex traffic environments is a valuable and challenging *** the boundary box location is not sufficiently accurate and it is difficult to distinguish overlapping and occluded objects,the authors propose a network model with a second-order term attention mechanism and occlusion ***,the backbone network is built on *** a method is designed for the feature extraction network based on an item-wise attention mechanism,which uses the filtered weighted feature vector to replace the original residual fusion and adds a second-order term to reduce the information loss in the process of fusion and accelerate the convergence of the ***,an objected occlusion regression loss function is studied to reduce the problems of missed detections caused by dense *** experimental results demonstrate that the authors’method achieved state-of-the-art performance without reducing the detection *** mAP@.5 of the method is 85.8%on the Foggy_cityscapes dataset and the mAP@.5 of the method is 97.8%on the KITTI dataset.

关键词： artificial intelligence computer vision image processing machine learning neural network object recognition

Comparison of nonlinear modeling methods for the composite rubber clamp

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Applied Mathematics and Mechanics(English Edition) 2024年第5期45卷 763-778页

作者： Yiming CAO hui MA Xumin GUO Bingfeng ZHAO hui LI Xin WANG Bing WANG School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China Key Laboratory of Vibration and Control of Aero-Propulsion Systems of Ministry of Education of China Northeastern UniversityShenyang 110819China AVIC Shenyang Engine Design Institute Shenyang 110013China Dalian Mengyu Machinery Co. Ltd.Dalian 116317Liaoning ProvinceChina

The cubic stiffness force model(CSFM)and Bouc-Wen model(BWM)are introduced and compared *** unknown coefficients of the nonlinear models are identified by the genetic algorithm combined with *** fitting the identified nonlinear coefficients under different excitation amplitudes,the nonlinear vibration responses of the system are *** results show that the accuracy of the BWM is higher than that of the CSFM,especially in the non-resonant ***,the optimization time of the BWM is longer than that of the CSFM.

关键词： pipeline system nonlinear clamp model composite rubber clamp amplitude-dependent characteristic vibration response experiment

Partnering crops with root-associated microbes for soil health and agricultural sustainability

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Pedosphere 2024年第1期34卷 26-29页

作者： Cunhu WANG Yongjia zhong Hong LIAO Root Biology Center College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002China

Increasing global demand for food presents a significant challenge to maintaining soil health and sustainable production of agricultural crops. As plant root-associated microbial fitness is greatly impacted by community growth, development, and nutrient acquisition, the cultivation of functional assembly of root-associated microbes may provide solutions for achieving food security while maintaining healthy soils. Here, we propose a four-part strategy to promote soil health and agricultural productivity by partnering crops with root-associated microbes.

关键词： crops soil agricultural

Multi-Level Parallel Network for Brain Tumor Segmentation

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Computer Modeling in Engineering & Sciences 2024年第4期139卷 741-757页

作者： Juhong Tie hui Peng School of Software Engineering Chengdu University of Information TechnologyChengdu610225China

Accurate automatic segmentation of gliomas in various sub-regions,including peritumoral edema,necrotic core,and enhancing and non-enhancing tumor core from 3D multimodal MRI images,is challenging because of its highly heterogeneous appearance and *** convolution neural networks(CNNs)have recently improved glioma segmentation ***,extensive down-sampling such as pooling or stridden convolution in CNNs significantly decreases the initial image resolution,resulting in the loss of accurate spatial and object parts information,especially information on the small sub-region tumors,affecting segmentation ***,this paper proposes a novel multi-level parallel network comprising three different level parallel subnetworks to fully use low-level,mid-level,and high-level information and improve the performance of brain tumor *** also introduce the Combo loss function to address input class imbalance and false positives and negatives imbalance in deep *** proposed method is trained and validated on the BraTS 2020 training and validation *** the validation dataset,ourmethod achieved a mean Dice score of 0.907,0.830,and 0.787 for the whole tumor,tumor core,and enhancing tumor core,*** with state-of-the-art methods,the multi-level parallel network has achieved competitive results on the validation dataset.

关键词： Convolution neural network brain tumor segmentation parallel network

Astrocyte syncytium:from neonatal genesis to aging degeneration

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Neural Regeneration Research 2024年第2期19卷 395-396页

作者： Min Zhou Shiying zhong Alexei Verkhratsky Department of Neuroscience Ohio State University Wexner Medical CenterColumbusOHUSA Faculty of Biology Medicine and HealthThe University of ManchesterManchesterUK Achücarro Basque Center for Neuroscience IKERBASQUEBasque Foundation for ScienceBilbaoSpain Department of Neurosciences University of the Basque Country UPV/EHU and CIBERNEDLeioaSpain

Modern neuroscience began from all reaching and fierce conflict between“neuronismo and reticulismo”——between neuronal and reticular theories of the organization of the nervous system;the conflict culminated in December of 1.06 in Stockholm where Santiago Ramon y Cajal(the proponent of the neuronal doctrine)and Camillo Golgi(who advocated the syncytial reticular organization of neural networks)delivered their Noble prize lectures(Verkhratsky,2009).

关键词： degeneration neonatal aging