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Effects of acid-rock reaction on physical properties during CO_(2)-rich industrial waste gas(CO_(2)-rich IWG)injection in shale reservoirs

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Petroleum Science 2024年第1期21卷 272-285页

作者： Yi-Fan Wang jing Wang Hui-Qing Liu Xiao-Cong Lv ze-Min ji National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing102249China MOE Key Laboratory of Petroleum Engineering China University of PetroleumBeijing102249China Research Institute of Exploration and Development PetroChinaBeijing100083China

"Carbon peaking and carbon neutrality"is an essential national strategy,and the geological storage and utilization of CO_(2)is a hot issue today.However,due to the scarcity of pure CO_(2)gas sources in China and the high cost of CO_(2)capture,CO_(2)-rich industrial waste gas(CO_(2)-rich IWG)is gradually emerging into the public's gaze.CO_(2)has good adsorption properties on shale surfaces,but acidic gases can react with shale,so the mechanism of the CO_(2)-rich IWG-water-shale reaction and the change in reservoir properties will determine the stability of geological storage.Therefore,based on the mineral composition of the Longmaxi Formation shale,this study constructs a thermodynamic equilibrium model of water-rock reactions and simulates the regularity of reactions between CO_(2)-rich IWG and shale minerals.The results indicate that CO_(2)consumed 12%after reaction,and impurity gases in the CO_(2)-rich IWG can be dissolved entirely,thus demonstrating the feasibility of treating IWG through water-rock reactions.Since IWG inhibits the dissolution of CO_(2),the optimal composition of CO_(2)-rich IWG is 95%CO_(2)and 5%IWG when CO_(2)geological storage is the main goal.In contrast,when the main goal is the geological storage of total CO_(2)-rich IWG or impurity gas,the optimal CO_(2)-rich IWG composition is 50%CO_(2)and 50%IWG.In the CO_(2)-rich IWG-water-shale reaction,temperature has less influence on the water-rock reaction,while pressure is the most important parameter.SO2 has the greatest impact on water-rock reaction in gas.For minerals,clay minerals such as illite and montmorillonite had a significant effect on water-rock reaction.The overall reaction is dominated by precipitation and the volume of the rock skeleton has increased by 0.74 cm3,resulting in a decrease in shale porosity,which enhances the stability of CO_(2)geological storage to some extent.During the reaction between CO_(2)-rich IWG-water-shale at simulated temperatures and pressures,precipitation is the main reaction,and shale porosity decrease

关键词： CO_(2)-rich industrial waste gas Geological storage Acid-rock reaction Shale Geochemical modelling

FCOS-LSC:A Novel Model for Green Fruit Detection in a Complex Orchard Environment

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Plant Phenomics 2023年第3期5卷 546-563页

作者： Ruina Zhao Yujie Guan Yuqi Lu ze ji Xiang Yin Weikuan jia School of Information Science and Engineering Shandong Normal UniversityJinan 250358China School of Engineering Cardiff UniversityCardiff CF243AAUK School of Agricultural Engineering and Food Science Shandong University of TechnologyZibo 255000China Key Laboratory of Facility Agriculture Measurement and Control Technology and Equipment of Machinery Industry Zhenjiang 212013China

To better address the difficulties in designing green fruit recognition techniques in machine vision systems,a new fruit detection model is proposed.This model is an optimization of the FCOS(full convolution one-stage object detection)algorithm,incorporating LSC(level scales,spaces,channels)attention blocks in the network structure,and named FCOS-LSC.The method achieves efficient recognition and localization of green fruit images affected by overlapping occlusions,lighting conditions,and capture angles.Specifically,the improved feature extraction network ResNet50 with added deformable convolution is used to fully extract green fruit feature information.The feature pyramid network(FPN)is employed to fully fuse low-level detail information and high-level semantic information in a cross-connected and top-down connected way.Next,the attention mechanisms are added to each of the 3 dimensions of scale,space(including the height and width of the feature map),and channel of the generated multiscale feature map to improve the feature perception capability of the network.Finally,the classification and regression subnetworks of the model are applied to predict the fruit category and bounding box.In the classification branch,a new positive and negative sample selection strategy is applied to better distinguish supervised signals by designing weights in the loss function to achieve more accurate fruit detection.The proposed FCOS-LSC model has 38.65M parameters,38.72G floating point operations,and mean average precision of 63.0%and 75.2%for detecting green apples and green persimmons,respectively.In summary,FCOS-LSC outperforms the state-of-the-art models in terms of precision and complexity to meet the accurate and efficient requirements of green fruit recognition using intelligent agricultural equipment.Correspondingly,FCOS-LSC can be used to improve the robustness and generalization of the green fruit detection models.

关键词： connected designing weights

Information Protocol Equilibrium in n-insider Perfect Competition with a Random Deadline

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Acta Mathematicae Applicatae Sinica 2024年

作者： Qi-hong NIE ji-xiu QIU ji-ze LI Yong-hui ZHOU School of Big Data and Computer Sciences Guizhou Normal University School of Mathematical Sciences Guizhou Normal University

This paper studies a model of n insiders with perfect information trading on a risky asset with value normally distributed and disclosed at a random deadline. We propose a concept of information protocol equilibrium under semi-strong efficient pricing, consisting of an n-profile of insider trading strategies with terminal residual information protocols, and find that if a common protocol on terminal residual information before trading is obeyed by all insiders, then, in the market with more than two insiders there exists a uique equilibrium only when it requires to release common partial information eventually, or it does not exist if it requires to release all or not any; but in the market with a single insider, the insider may release all private information eventually to make a maximal profit. Thereby, the existence and uniqueness of information protocol equilibrium among n insiders are deduced. Finally, numerical results illustrate some market characteristics of equilibria with different information protocols required before trading.

关键词：

基于指数随机图模型的发明者合作网络形成机制研究

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科技进步与对策 2024年第13期41卷 131-140页

作者：林润辉季泽南开大学商学院天津300071 南开大学中国公司治理研究院天津300071

聚焦探讨不同因素是否以及如何影响发明者合作网络形成,基于2004—2021年华为在中国申请的专利数据,构建发明者合作网络,运用指数随机图模型探讨行动者属性和内生结构效应对发明者合作网络形成的影响机理。结果表明:发明者合作网络是稀... 详细信息

聚焦探讨不同因素是否以及如何影响发明者合作网络形成,基于2004—2021年华为在中国申请的专利数据,构建发明者合作网络,运用指数随机图模型探讨行动者属性和内生结构效应对发明者合作网络形成的影响机理。结果表明:发明者合作网络是稀疏网络,呈现星形结构和闭合三角形结构共存的网络结构模式;发明者协同创新能力抑制新合作关系的形成,但发明者合作伙伴多样性和合作深度均促进新合作关系的形成,且具有相同水平合作伙伴多样性或合作深度的发明者之间更容易建立合作关系;发明者倾向于与处于中心位置的发明者建立合作关系以及与具有共同合作伙伴的直接合作伙伴建立新合作关系。

关键词：发明者合作网络指数随机图模型内生结构效应网络形成机制

BFP Net: Balanced Feature Pyramid Network for Small Apple Detection in Complex Orchard Environment

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Plant Phenomics 2022年第1期4卷 75-93页

作者： Meili Sun Liancheng Xu Xiude Chen ze ji Yuanjie Zheng Weikuan jia School of Information Science and Engineering Shandong Normal UniversityJinanChina Key Laboratory of Facility Agriculture Measurement and Control Technology and Equipment of Machinery Industry Zhenjiang 212013China National Engineering Research Center for Apple Shandong Agriculture UniversityTaian 271018China School of Engineering Cardiff UniversityCardiff CF243AAUK

Despite of significant achievements made in the detection of target fruits,small fruit detection remains a great challenge,especially for immature small green fruits with a few pixels.The closeness of color between the fruit skin and the background greatly increases the difficulty of locating small target fruits in the natural orchard environment.In this paper,we propose a balanced feature pyramid network(BFP Net)for small apple detection.

关键词： Net pyramid locating

Model Implementation and Analysis of a True Three-dimensional Display System

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Computer Systems Science & Engineering 2021年第12期39卷 403-414页

作者： Ye Tian Yang Yang Han Yang ze ji Changchun University of Science and Technology Changchun130022China Tsinghua University Beijing100084China Academy of Military Sciences Beijing100166China Cardiff University CardiffCF243AAUK

To model a true three-dimensional(3D)display system,we introduced the method of voxel molding to obtain the stereoscopic imaging space of the system.For the distribution of each voxel,we proposed a four-dimensional(4D)Givone–Roessor(GR)model for state-space representation—that is,we established a local state-space model with the 3D position and one-dimensional time coordi-nates to describe the system.First,we extended the original elementary operation approach to a 4D condition and proposed the implementation steps of the realiza-tion matrix of the 4D GR model.Then,we described the working process of a true 3D display system,analyzed its real-time performance,introduced the fixed-point quantization model to simplify the system matrix,and derived the conditions for the global asymptotic stability of the system after quantization.Finally,we provided an example to prove the true 3D display system’s feasibility by simulation.The GR-model-representation method and its implementation steps proposed in this paper simplified the system’s mathematical expression and facilitated the microcon-troller software implementation.Real-time and stability analyses can be used widely to analyze and design true 3D display systems.

关键词： True 3D display system method of voxel molding(MVM) Givone-Roessor(GR)model asymptotic stability Bounded-Input Bounded-Output(BIBO)stability real-time display

基于TNFR/RIPK1通路探索紫草素对大鼠脊髓损伤的作用及机制

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中国骨伤 2024年第1期37卷 61-68页

作者：史吉胜钱吉泽王金广林斌庞同涛山东大学齐鲁医院德州医院骨科山东德州253600 中国人民解放军第909医院骨科福建漳州363000

目的:初步探讨紫草素对大鼠急性脊髓损伤(spinal cord injury,SCI)后神经功能恢复的影响及作用机制。方法:将96只Sprague-Dawley(SD)雄性大鼠分为4组:假手术组,即A组;假手术+紫草素组,即B组;脊髓损伤+二甲基亚砜(dimethyl sulfoxide,DM... 详细信息

目的:初步探讨紫草素对大鼠急性脊髓损伤(spinal cord injury,SCI)后神经功能恢复的影响及作用机制。方法:将96只Sprague-Dawley(SD)雄性大鼠分为4组:假手术组,即A组;假手术+紫草素组,即B组;脊髓损伤+二甲基亚砜(dimethyl sulfoxide,DMSO)组,即C组;脊髓损伤+紫草素组,即D组;每组24只。C、D组采用钳夹法制作大鼠急性SCI模型。所有大鼠硬膜下置管,A组不给药,B组和D组造模后30 min经导管注射紫草素100 mg·kg^(-1),C组注射等量DMSO,每日1次,至取材时间点。各组分别于造模后6、12 h和3 d每组取8只大鼠,行Basso-Beattie-Bresnahan(BBB)评分及造模后1、3、7、14、21d行斜板实验,再处死动物取脊髓组织。造模后1h每组大鼠腹腔注射碘化丙啶(propidine iodide,PI)1 mg·kg^(-1),术后24 h取材检测脊髓组织PI红染细胞数;24 h时取材采用苏木素-伊红(haematoxylin eosin,HE)染色观察脊髓损伤情况,尼氏(Nissl)染色观察神经元存活数量,使用Western-blot技术检测B细胞淋巴瘤-2(B cell lymphoma-2,Bcl-2)蛋白及调亡相关蛋白受体相互作用蛋白激酶1(receptor-interacting protein kinase1,RIPK1)的表达水平。结果:造模后A组和B组各时间点的BBB评分均正常,C、D组各时间点均低于A、B组,D组造模后12 h和3d的BBB评分高于同时间点C组(P<0.05)。造模后12 h,D组PI红染细胞较C组明显减少,神经元崩解减轻(P<0.05)。造模后24h,A组和B组脊髓组织HE和Nissl染色正常,D组脊髓组织损伤程度和存活神经元数量均优于C组(P<0.05)。Bcl-2、RIPK1蛋白在A组、B组表达很低;RIPK1在C组表达明显增高,在D组表达明显下降,差异有统计学意义(P<0.05);Bcl-2蛋白在D组表达高于C组(P<0.05)。结论:紫草素可减轻大鼠急性SCI后的病理变化,改善行为学评分,促进脊髓神经功能恢复。其具体机制可能与抑制TNFR/RIPK1信号通路介导的坏死性凋亡有关。

关键词：脊髓损伤紫草素功能恢复

商业银行基于智能交易监测平台的一体化支付风险防控体系研究

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产业科技创新 2024年第2期6卷 92-95页

作者：朱飞季泽恒丰银行股份有限公司山东济南250012

随着国家层面上对交易支付中发生的风险事件高度重视,金融监管机构正引导金融行业发动行业力量,通过应用人工智能、大数据、生物识别、隐私计算等创新技术,同不法支付行为进行斗争与博弈。不法分子也在应用新技术,而且在场景方面已做到... 详细信息

随着国家层面上对交易支付中发生的风险事件高度重视,金融监管机构正引导金融行业发动行业力量,通过应用人工智能、大数据、生物识别、隐私计算等创新技术,同不法支付行为进行斗争与博弈。不法分子也在应用新技术,而且在场景方面已做到全面融合时事热点、社交活动、商业促销、行政管理等。商业银行在全方位的渗透、融合的支付风险的交易拦截、账户管控、限额管理、客户识别方面,面临前所未有的困难;而商业银行在严峻的风险防控形势中缺少成熟的制度、流程、防控机制与措施作为参考,本文通过研究以应用机器学习等算法建设智能防控架构为核心思路,为商业银行应对交易支付风险提供参考。

关键词：一体化智能防控监测预警

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高温碱溶液中混合型缓冲材料膨胀特性研究

岩石力学与工程学报 2024年第S1期43卷 3507-3519页

作者：张虎元季泽周光平童艳梅王婷婷兰州大学土木工程与力学学院甘肃兰州730000 兰州大学西部灾害与环境力学教育部重点实验室甘肃兰州730000

高放废物地下处置库中,地下水腐蚀衬砌混凝土析出的强碱性溶液,叠加核素衰变释放的辐射热,会影响缓冲材料的膨胀性能。以混合型缓冲材料(70%高庙子膨润土+30%石英砂)为试验对象,孔隙溶液选择蒸馏水和KOH溶液,溶液浓度为0.1,0.3,1.0 mol/... 详细信息

高放废物地下处置库中,地下水腐蚀衬砌混凝土析出的强碱性溶液,叠加核素衰变释放的辐射热,会影响缓冲材料的膨胀性能。以混合型缓冲材料(70%高庙子膨润土+30%石英砂)为试验对象,孔隙溶液选择蒸馏水和KOH溶液,溶液浓度为0.1,0.3,1.0 mol/L。设置试验温度为常温与90℃。测试不同初始干密度试样的膨胀力。试验完成后,对试样开展X射线衍射(XRD)试验,试验结果证实:高温提升了试样膨胀力发展速率与膨胀力值,最终膨胀力值最大增幅为19.3%。KOH溶液作用下缓冲材料膨胀力随时间发展出现衰退现象,是碱溶液危害膨胀性能的典型特征。最终膨胀力值对KOH浓度呈负相关,与初始干密度呈正相关。在90℃1.0 mol/L KOH溶液作用下,试样最终膨胀力值较蒸馏水,衰减程度达到52.3%以上。试样衰减主要与蒙脱石的溶解与阳离子交换有关。最严重的情况下,蒙脱石含量减小为初始的43.2%。

关键词：土力学混合型缓冲材料高庙子膨润土膨胀力温度 KOH溶液