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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 China Petroleum Planning & Engineering Institute School of Petroleum Engineering Chongqing University of Science and Technology PipeChina Oil & Gas Control Center

Oilfield treated oil pipeline network is the link connecting the upstream oilfields and the downstream refineries. Due 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 benefit. In 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 simultaneously. The optimization objective is the multi-objective which includes the largest user satisfaction and the highest economic benefit. The 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 calculations. Python 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 solver. Moreover, the model is applied to a real treated oil pipeline network located in China, and three optimization scenarios are analyzed. For 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 3. For 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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Super P and MoO2/MoS2 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 University Instrumental Analysis Centre Hefei University of Technology Hefei Youngy Energy Materials Co. Ltd. Department of Modern Mechanics University of Science and Technology of China

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-MoO2/MoS2-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-MoO2/MoS2-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·*** 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： Li–S battery Membrane MoO2/MoS2 Nanofiber

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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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Prognostic significance of oligodendrocyte transcription factor 2 expression in glioma patients:A systematic review and metaanalys

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World Journal of Clinical Cases 2024年第25期12卷 5739-5748页

作者： Peng-Cheng Li De-Bo Yun Ya-Xin huang qian-Yi huang Department of Neurosurgery The Affiliated Nanchong Central Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina Department of Transfusion The Affiliated Nanchong Central Hospital of North Sichuan Medical CollegeNanchong 637000Sichuan ProvinceChina

BACKGROUND Gliomas are the most common primary central nervous system *** recent advances in the diagnosis and treatment of gliomas,patient prognosis remains ***,it is imperative to identify novel diagnostic biomarkers and therapeutic targets of glioma to effectively improve treatment *** To investigate the association between oligodendrocyte transcription factor 2(Olig2)expression and the outcomes of glioma *** The PubMed,Embase,Cochrane Library,and China National Knowledge Infrastructure databases were searched for studies(published up to October 2023)that investigated the relationship between Olig2 expression and prognosis of glioma *** quality of the studies was assessed using the Newcastle Ottawa *** analyses were performed using Stata Version 12.0 *** A total of 1205 glioma patients from six studies were included in the *** Olig2 expression was associated with better outcomes in glioma patients[hazard ratio(HR):0.81;95%(confidence interval)CI:0.51-1.27;P=0.000].Furthermore,the results of subgroup meta-analysis showed that high expression of Olig2 was associated with poor overall survival in European patients(HR:1.34;95%CI:0.79-2.27)and better prognosis in Asian patients(HR:0.43;95%CI:0.22-0.84).The sensitivity analysis showed that no single study had a significant effect on pooled HR,and there was also no indication of publication bias according to the Egger’s and Begger’s P value test or funnel plot *** High Olig2 expression may have a positive impact on the prognosis of glioma patients,and should be investigated further as a prognostic biomarker and therapeutic target for glioma.

关键词： Glioma Oligodendrocyte transcription factor 2 Prognosis Biomarker Meta-analysis

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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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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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含硼纳米流体燃料液滴燃烧特性研究

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工程热物理学报 2024年第8期45卷 2524-2530页

作者：肖思祺黄骞李水清清华大学能源与动力工程系热科学与动力工程教育部重点实验室北京100084

含硼纳米流体燃料能量密度高,发展潜力大,但着火延迟、燃烧行为等基础燃烧特性研究的匮乏限制了该燃料在发动机上的实际应用。本文搭建了基于多元扩散平焰燃烧器的“飞滴法”实验平台,研究含硼(质量分数0~10%)乙醇液滴的着火及燃烧特性... 详细信息

含硼纳米流体燃料能量密度高,发展潜力大,但着火延迟、燃烧行为等基础燃烧特性研究的匮乏限制了该燃料在发动机上的实际应用。本文搭建了基于多元扩散平焰燃烧器的“飞滴法”实验平台,研究含硼(质量分数0~10%)乙醇液滴的着火及燃烧特性。发现添加硼颗粒降低了乙醇液滴的着火延迟时间,在1400 K下降幅可达约30%;添加硼颗粒会导致液滴微爆,且随温度升高,液滴微爆发生的时间更早。建立了包含纳米颗粒辐射吸收机制的单液滴燃烧模型,量化纳米颗粒辐射吸热对液滴初期燃烧速率的增幅,结果表明该机制不是纳米颗粒促进液滴燃烧的唯一主导因素。

关键词：硼纳米流体燃料着火延迟微爆炸液滴燃烧

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防护林建设过程中土壤微生物养分限制与有机碳组分之间的关系

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环境科学 2024年第4期45卷 2342-2352页

作者：徐凤璟黄懿梅黄倩申继凯西北农林科技大学资源环境学院农业农村部西北植物营养与农业环境重点实验室农业农村部西北旱地农业绿色低碳重点实验室杨凌712100

微生物主要通过“体外修饰”和“体内周转”途径影响土壤颗粒态有机碳(POC)和矿物结合态有机碳(MAOC)的累积,而不同的植物输入引起的微生物养分限制对两种土壤有机碳(SOC)组分累积的影响机制尚不清楚.因此,以陕西省米脂县的撂荒地为对照... 详细信息

微生物主要通过“体外修饰”和“体内周转”途径影响土壤颗粒态有机碳(POC)和矿物结合态有机碳(MAOC)的累积,而不同的植物输入引起的微生物养分限制对两种土壤有机碳(SOC)组分累积的影响机制尚不清楚.因此,以陕西省米脂县的撂荒地为对照(CK),测定人工林建设的第3、13、20和37 a的0~5、5~10和10~20 cm土层中SOC、POC和MAOC含量及用于计算养分限制的土壤胞外酶活性,探讨防护林建设过程中SOC积累的微生物养分限制机制.结果表明:(1)ω(SOC)、ω(POC)和ω(MAOC)分别3.14~8.35、0.44~1.87和1.99~6.72 g·kg^(-1);各组分有机碳含量在林地建设第3 a时均显著低于CK(P<0.05),且随防护林建设先增加后降低:0~5 cm和5~10 cm中SOC和MAOC含量在第20 a达到最大,但总体低于CK;10~20 cm中二者在第13 a达到最大且高于CK;0~5 cm和5~10 cm中ω(POC)在第37 a达到最大,10~20 cm中在第13 a达到最大.(2)0~5 cm中β-葡萄糖苷酶活性在第20 a时最高,其余土层在第13 a最高,但均在第37 a降至最低;0~5 cm中亮氨酸氨基肽酶和N-乙酰基氨基葡萄糖苷酶活性随防护林建设呈增加趋势,第37 a时显著高于CK(P<0.05);碱性磷酸酶活性在第3 a时显著低于CK(P<0.05),第20 a时0~5 cm和5~10 cm中其活性最高,10~20 cm中为最低.(3)第3 a酶化学计量比的向量角度(VA)和长度(VL)显著高于CK(P<0.05),即防护林建设加剧了微生物C、N限制;在防护林建设过程中,N限制减弱,而C限制仅在第37 a时有所缓解.(4)结构方程模型显示,第3 a微生物C限制的增强,导致POC含量降低和MAOC含量增加,微生物将主要以“体内周转”积累有机碳;随着微生物N限制的缓解,通过“体内周转”形成的MAOC含量将会增加.因此,长期的防护林建设利于植物源有机碳累积,且以固氮植物造林将有助于促进稳定的SOC组分增加,提升植被固碳效率.

关键词：防护林建设土壤有机碳(SOC) 颗粒态有机碳(POC) 矿物结合态有机碳(MAOC) 土壤胞外酶活性养分限制

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Normal pregnancy outcome after first-trimester exposure to semaglutide in an overweight woman: a case report

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Clinical Research Communications 2024年第2期7卷 30-33页

作者： Xi-Mei Zhu qian-Yun huang Yue Chen Ying Zhou Cai-Hua Yang Clinical Pharmacy Center Nanfang HospitalSouthern Medical UniversityGuangzhou 510515China Department of Pharmacy Baiyun Branch of Nanfang HospitalSouthern Medical UniversityGuangzhou 510599China

We reported a case of an overweight 34-year-old woman who unexpectedly became pregnant while undergoing semaglutide in early pregnancy and delivered a healthy male infant by caesarean section at 37 weeks and 4 days of *** now,the safety of semaglutide for use during pregnancy was *** report may contribute to the limited knowledge available on pregnant women exposure to semaglutide.

关键词： case report glucagon-like peptide-1 receptor agonist semaglutide normal pregnancy outcome

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