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An optimal flow rate allocation model of the oilfield treated oil pipeline network

Petroleum 2024年第1期10卷 93-100页

作者： Hai Li Tianyou Fan Kun Wang Xueyuan Long Yu He Meng Wang Wen Cheng qian huang Huirong huang Weichao Yu PetroChina Southwest Oil&Gasfield Company Chengdu 610056China China Petroleum Planning&Engineering Institute Beijing 100083China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China PipeChina Oil&Gas Control Center Dongtucheng RoadChaoyang DistrictBeijing 100028China

Oilfield treated oil pipeline network is the link connecting the upstream oilfields and the downstream *** to the differences in operating costs and transportation fee between different pipelines and the fluctuation in the demand and sales prices of the treated oil,there is an optimal flow allocation plan for the pipeline network to make the oilfield company obtain the highest social and economic *** this study,a mixed integer nonlinear programming(MINLP)model is developed to determine the optimal flow rate allocation plan of the large-scale and complex treated oil pipeline network,and both the social and economic benefits are considered *** optimization objective is the multi-objective which includes the largest user satisfaction and the highest economic *** model constraints include the oilfield production capacity,refinery demand,pipeline transmission capacity,flow,pressure,and temperature of the node and station,and the pipeline hydraulic and thermal *** 3.7 is utilized for the programming of the off-line calculation procedure and the MINLP model,and GUROBI 9.0.2 is served as the MINLP ***,the model is applied to a real treated oil pipeline network located in China,and three optimization scenarios are *** social benefit,the values of the user satisfaction of each refinery and the total network are 1 before and after optimization for scenarios 1,2,and *** economic benefit,the annual revenue can be increased by 0.227,0.293,and 0.548 billion yuan after the optimization in scenario 1,2,and 3,respectively.

关键词： Treated oil pipeline network Flow rate allocation Optimal User satisfaction Economic benefit

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Age and mean platelet volume-based nomogram for predicting the therapeutic efficacy of metoprolol in Chinese pediatric patients with vasovagal syncope

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World Journal of Pediatrics 2024年第9期20卷 957-965页

作者： Xiao-Juan Du Ya-qian huang Xue-Ying Li Ying Liao Hong-Fang Jin Jun-Bao Du Department of Pediatrics Peking University First HospitalNo.1 Xi’anmen StreetWest DistrictBeijing100034China State Key Laboratory of Vascular Homeostasis and Remodeling Peking UniversityNo.38Xueyuan RoadHaidian DistrictBeijing100191China Department of Statistics Peking University First HospitalBeijing100034China

Background Vasovagal syncope(VVS)is the most common type of orthostatic intolerance in *** investigated whether platelet-related factors related to treatment efficacy in children suffering from VVS treated with *** Metoprolol-treated VVS patients were *** median duration of therapy was three *** were followed and divided into two groups,treament-effective group and treatment-ineffective *** and least absolute shrinkage selection operator regressions were used to examine treatment outcome ***-operating characteristic(ROC)curves,precision-recall(PR)curves,calibration plots,and decision curve analyses were used to evaluate the nomogram *** Among the 72 patients who complete the follow-up,treatment-effective group and treatment-ineffective group included 42(58.3%)and 30(41.7%)cases,*** patients in the treatment-effective group exhibited higher mean platelet volume(MPV)[(11.0±1.0)fl vs.(9.8±1.0)fl,P<0.01]and platelet distribution width[12.7%(12.3%,14.3%)vs.11.3%(10.2%,12.2%),P<0.01]than those in the treatment-ineffective *** sex ratio was significantly different(P=0.046).A fit model comprising age[odds ratio(OR)=0.766,95%confidence interval(CI)=0.594-0.987]and MPV(OR=5.613,95%CI=2.297-13.711)might predict therapeutic *** area under the curve of the ROC and PR curves was computed to be 0.85 and 0.9,*** P value of the Hosmer-Lemeshow test was *** decision curve analysis confirmed that managing children with VVS based on the predictive model led to a net advantage ranging from 0.01 to *** nomogram is convenient for clinical *** A novel nomogram based on age and MPV can predict the therapeutic benefits of metoprolol in children with VVS.

关键词： Metoprolol Nomogram Retrospective study Therapeutic effect Vasovagal syncope

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Super P and MoO_(2)/MoS_(2)co-doped gradient nanofiber membrane as multi-functional separator for lithium–sulfur batteries

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Rare Metals 2024年第9期43卷 4263-4273页

作者： Xin Liang Dong-Qing Zhao qian-qian huang Sheng Liang Li-Li Wang Lei Hu Ling-Li Liu Kun-Hong Hu Chong-Hai Deng Sheng Cheng Er-Tao Zhu Hua-Xia Deng School of Energy Materials and Chemical Engineering LIB Technology Center of Anhui ProvinceHefei UniversityHefei 230601China Instrumental Analysis Centre Hefei University of TechnologyHefei 230009China Hefei Youngy Energy Materials Co. Ltd.Hefei 230000China Department of Modern Mechanics University of Science and Technology of ChinaHefei 230026China

Lithium-sulfur battery is one of the most promising battery systems for industrialization due to its high theoretical specific capacity and high energy ***,the"shuttle effect"has restrained the advancement of lithium-sulfur *** this work,a gradient-structured nanofiber membrane with pure gelatin on one side and Super P-MoO_(2)/MoS_(2)-gelatin on the other side was created using a multi-step electrostatic spinning technique,which was applied for multi-functional separator for lithium-sulfur *** pure gelatin layer facing the anode side primarily homogenizes the lithium flux,whereas the Super P-MoO_(2)/MoS_(2)-gelatin layer facing the cathode side primarily adsorbs polysulfides by physical and chemical adsorption and enhancing polysulfide conversion *** findings demonstrate that even after 150 cycles at 0.2C,the lithium-sulfur battery can still sustain a discharge-specific capacity of 572.3 mAh·g^(-1).When used with Li||Li symmetric batteries,it has a cycle life of more than 1200 *** commercialization of lithium-sulfur batteries is given a fresh idea by this straightforward preparation technique.

关键词： MoO_(2)/MoS_(2) Nanofiber Membrane Li-S battery

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High-performance and wavelength-transplantable on-chip Fourier transform spectrometer using MEMS in-plane reconfiguration

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Photonics Research 2024年第8期12卷 1730-1740页

作者： HENG CHEN HUI ZHANG JING ZHOU CHEN MA qian huang HANXING WANG QINGHUA REN NAN WANG CHENGKUO LEE YIMING MA School of Microelectronics Shanghai UniversityShanghai 201800China Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology Shanghai UniversityShanghai 201800China Department of Electrical and Electronic Engineering The Hong Kong Polytechnic UniversityHong Kong 999077China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore Center for Intelligent Sensors and MEMS(CISM) National University of SingaporeSingapore 117608Singapore

On-chip spectrometers with high compactness and portability enable new applications in scientific research and industrial *** transform(FT)spectrometers have the potential to realize a high signal-to-noise *** we propose and demonstrate a generalized design for high-performance on-chip FT *** spectrometer is based on the dynamic in-plane reconfiguration of a waveguide coupler enabled by an integrated comb-drive actuator *** electrostatic actuation intrinsically features ultra-low power *** coupling gap is crucial to the spectral *** in-plane reconfiguration surmounts the lithography accuracy limitation of the coupling gap,boosting the resolution to 0.2 nm for dual spectral spikes over a large bandwidth of 100 nm(1.5–1.6μm)within a compact footprint of 75μm×1000μ***,the in-plane tuning range can be large enough for arbitrary wavelengths to ensure the effectiveness of spectrum *** a result,the proposed spectrometer can be easily transplanted to other operation bands by simply scaling the structural *** a proof-of-concept,a mid-infrared spectrometer is further demonstrated with a dual-spike reconstruction resolution of 1.5 nm and a bandwidth of 300 nm(4–4.3μm).

关键词： waveguide tuning lithography

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Liquid lens based holographic camera for real 3D scene hologram acquisition using end-to-end physical model-driven network

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Light(Science & Applications) 2024年第3期13卷 488-497页

作者： Di Wang Zhao-Song Li Yi Zheng You-Ran Zhao Chao Liu Jin-Bo Xu Yi-Wei Zheng qian huang Chen-Liang Chang Da-Wei Zhang Song-Lin Zhuang Qiong-Hua Wang School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China

With the development of artificial intelligence,neural network provides unique opportunities for holography,such as high fidelity and dynamic *** to obtain real 3D scene and generate high fidelity hologram in real time is an urgent ***,we propose a liquid lens based holographic camera for real 3D scene hologram acquisition using an end-to-end physical model-driven network(EEPMD-Net).As the core component of the liquid camera,the first 10 mm large aperture electrowetting-based liquid lens is proposed by using specially fabricated *** design of the liquid camera ensures that the multi-layers of the real 3D scene can be obtained quickly and with great imaging *** EEPMD-Net takes the information of real 3D scene as the input,and uses two new structures of encoder and decoder networks to realize low-noise phase *** comparing the intensity information between the reconstructed image after depth fusion and the target scene,the composite loss function is constructed for phase optimization,and the high-fidelity training of hologram with true depth of the 3D scene is realized for the first *** holographic camera achieves the high-fidelity and fast generation of the hologram of the real 3D scene,and the reconstructed experiment proves that the holographic image has the advantage of low *** proposed holographic camera is unique and can be used in 3D display,measurement,encryption and other fields.

关键词： calculation solution holographic

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国家体育旅游示范区建设思考

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体育文化导刊 2024年第5期 85-91页

作者：黄倩广西师范大学学工处广西桂林541006

运用文献资料、实地调查、逻辑分析等方法,分析国家体育旅游示范区建设价值、困境,并提出对策。价值:推动地方经济增长,传播中国体旅文化,助力乡村振兴战略。困境:政策保障有待完善,体旅品牌缺乏建设,人才支撑不够充分,基础设施需要加... 详细信息

运用文献资料、实地调查、逻辑分析等方法,分析国家体育旅游示范区建设价值、困境,并提出对策。价值:推动地方经济增长,传播中国体旅文化,助力乡村振兴战略。困境:政策保障有待完善,体旅品牌缺乏建设,人才支撑不够充分,基础设施需要加强。对策:健全政策保障体系,完善反馈执行细则;建设体育旅游品牌,打造立体宣传平台;加强人才服务管理,共建校企育人模式;多元主体共促基建,智慧保障游客需求。

关键词：体育经济体育旅游国家体育旅游示范区

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The influence of different types of satisfaction on loyalty on C2C online shopping platform:From the perspective of sellers and the platform

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中国科学技术大学学报 2024年第5期54卷 36-48,I0007页

作者： Yanan Lu qian huang Yuting Wang School of Management University of Science and Technology of ChinaHefei 230026China SILC Business School Shanghai UniversityShanghai 201800China

With the rise and development of major types of platforms,the competition for resources has become extremely fierce,and the market share of C2C platforms has been seriously threatened by the loss of ***,building and maintaining buyers’satisfaction and loyalty to C2C platforms is critical to the survival and sustainability of C2C platforms in ***,the current knowledge on how platform satisfaction and loyalty are constructed in the C2C e-commerce environment is *** this study,seller-based satisfaction and platform-based satisfaction are constructed *** further distinguish seller-based transaction satisfaction into economic and social satisfaction and explore their antecedents and *** test our research hypotheses,we conduct a survey and collect data from a real online market(Taobao website).The results show that seller-based transaction satisfaction positively affects platform-based overall satisfaction and loyalty,and that perceived product quality,perceived assurance,and perceived price fairness all have a significant effect on economic satisfaction,whereas perceived relationship quality and perceived empathy significantly influence social *** findings help us understand the literature related to customer satisfaction in the context of C2C in China and provide inspiration for online sellers and platforms.

关键词： transaction-specific satisfaction social and economic satisfaction various antecedents of satisfaction overall satisfaction C2C online shopping platform

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数字技术、环境污染与劳动者健康不平等——基于中国家庭追踪调查数据的实证分析

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干旱区资源与环境 2024年第8期38卷 51-61页

作者：方守林黄乾南开大学经济学院天津300071

近年来我国数字技术应用场景不断拓展,然而数字技术应用对劳动者健康不平等的影响还有待于理论分析和实证检验。文中扩展了Grossman的健康需求模型并以此为基础构建了异质性代理人模型以分析数字技术应用对劳动者健康不平等的影响与作... 详细信息

近年来我国数字技术应用场景不断拓展,然而数字技术应用对劳动者健康不平等的影响还有待于理论分析和实证检验。文中扩展了Grossman的健康需求模型并以此为基础构建了异质性代理人模型以分析数字技术应用对劳动者健康不平等的影响与作用机制,然后使用中国家庭追踪调查2014年、2016年、2018年和2020年的数据与统计年鉴的匹配数据运用固定效应模型和两阶段最小二乘法进行了实证检验。主要研究结论:1)数字技术应用缩小了劳动者健康不平等。2)通过更改样本范围和替换核心解释变量的方法进行稳健性检验的结果表明基准回归的结果是稳健的。3)数字技术应用对劳动者健康不平等的影响存在城乡、年龄和区域的异质性。数字技术应用对城镇、青年、东部地区和西部地区劳动者健康不平等的影响是显著的,对农村、中年和老年、中部地区劳动者健康不平等的影响不显著。4)环境污染是数字技术应用影响劳动者健康不平等的机制。数字技术应用减少了环境污染进而缩小了劳动者健康不平等。研究结论有助于理解数字技术应用对劳动者健康不平等的影响与作用机制,对制定促进数字技术发展的政策和促进劳动者健康的政策具有积极的借鉴意义。

关键词：数字技术健康不平等环境污染

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基于骨骼的人体行为识别方法研究综述

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计算机辅助设计与图形学学报 2024年第2期36卷 173-194页

作者：黄倩崔静雯李畅河海大学计算机与信息学院南京211100

人体行为识别在视频理解中发挥了重要作用.近年来,基于骨骼的行为识别方法因其对复杂环境的干扰更具鲁棒性而受到广泛关注.文中共整理了102种基于骨骼的人体行为识别方法,并在9个公开数据集上对其进行了对比分析.按照特征学习方式的不同... 详细信息

人体行为识别在视频理解中发挥了重要作用.近年来,基于骨骼的行为识别方法因其对复杂环境的干扰更具鲁棒性而受到广泛关注.文中共整理了102种基于骨骼的人体行为识别方法,并在9个公开数据集上对其进行了对比分析.按照特征学习方式的不同,分别介绍了基于手工特征的方法和基于深度学习的方法.其中,基于手工特征的方法按特征描述符的不同分为几何描述符、动力学描述符、统计描述符3个子类;基于深度学习的方法按网络主体的不同分为循环神经网络、卷积神经网络、图卷积网络、Transformer和混合网络5个子类.通过以上分析,不仅阐述了基于骨骼的行为识别方法的发展历程,还剖析了现有方法存在的泛化能力不强、计算成本高等局限.最后,从网络结构设计、相似动作区分、领域数据集拓展、多人交互等方面对未来研究方向进行了展望.

关键词：计算机视觉行为识别骨骼数据手工特征深度学习神经网络

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Clinical Application of Preliminary Breast Cancer Screening for Dense Breasts Using Real-Time AI-Powered Ultrasound with Deep-Learning Computer Vision

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Journal of Clinical and Nursing Research 2024年第6期8卷 36-47页

作者： Zhenzhong Zhou Xueqin Xie Zongjin Yang Zhongxiong Feng Xiaoling Zheng qian huang School of Business Macao University of Science and TechnologyMacao 999078China Ultrasound Department Duanzhou District Women and Children's HospitalZhaoqing 526040China iCare365 Technologies Inc.Guangzhou 510515China

Objective:We propose a solution that is backed by cloud computing,combines a series of AI neural networks of computer vision;is capable of detecting,highlighting,and locating breast lesions from a live ultrasound video feed,provides BI-RADS categorizations;and has reliable sensitivity and *** deep-learning models were trained on more than 300,000 breast ultrasound images to achieve object detection and regions of interest *** main objective of this study was to determine whether the performance of our Al-powered solution was comparable to that of ultrasound ***:The noninferiority evaluation was conducted by comparing the examination results of the same screening women between our AI-powered solution and ultrasound radiologists with over 10 years of *** study lasted for one and a half years and was carried out in the Duanzhou District Women and Children's Hospital,Zhaoqing,China.1,133 females between 20 and 70 years old were selected through convenience ***:The accuracy,sensitivity,specificity,positive predictive value,and negative predictive value were 93.03%,94.90%,90.71%,92.68%,and 93.48%,*** area under the curve(AUC)for all positives was 0.91569 and the AUC for all negatives was *** comparison indicated that the overall performance of the AI system was comparable to that of ultrasound ***:This innovative AI-powered ultrasound solution is cost-effective and user-friendly,and could be applied to massive breast cancer screening.

关键词： Breast cancer screening Ultrasound Lesion detection BI-RADS Deep learning Computer vision Cloud computing

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