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Tunnelling performance prediction of cantilever boring machine in sedimentary hard-rock tunnel using deep belief network

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山地科学学报(英文) 2023年第7期20卷 2029-2040页

作者： SONG Zhan-ping CHENG Yun zhang ze-kun YANG Teng-tian School of Civil Engineering Xi'an University of Architecture and TechnologyXi'an 710055China School of Civil Engineering Yancheng Institute of TechnologyYancheng 224051China Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering Xi'an 710055China School of Highway Chang’an UniversityXi’an 710064China China Railway Construction Bridge Engineering Bureau Group Co. Ltd.Tianjin 300300China

Evaluating the adaptability of cantilever boring machine(CBM) through in-depth excavation and analysis of tunnel excavation data and rock mass parameters is the premise of mechanical design and efficient excavation in the field of underground space *** paper presented a case study of tunnelling performance prediction method of CBM in sedimentary hard-rock tunnel of Karst landform type by using tunneling data and surrounding rock *** uniaxial compressive strength(UCS),rock integrity factor(Kv),basic quality index([BQ]),rock quality index RQD,brazilian tensile strength(BTS) and brittleness index(BI) were introduced to construct a performance prediction database based on the hard-rock tunnel of Guiyang Metro Line 1 and Line 3,and then established the performance prediction model of cantilever boring *** the deep belief network(DBN) was introduced into the performance prediction model,and the reliability of performance prediction model was verified by combining with engineering *** study showed that the influence degree of surrounding rock parameters on the tunneling performance of the cantilever boring machine is UCS > [BQ] > BTS >RQD > Kv > *** performance prediction model shows that the instantaneous cutting rate(ICR) has a good correlation with the surrounding rock parameters,and the predicting model accuracy is related to the reliability of construction *** prediction of limestone and dolomite sections of Line 3 based on the DBN performance prediction model shows that the measured ICR and predicted ICR is consistent and the built performance prediction model is *** research results have theoretical reference significance for the applicability analysis and mechanical selection of cantilever boring machine for hard rock tunnel.

关键词： Urban metro tunnel Cantilever boring machine Hard rock tunnel Performance prediction model Linear regression Deep belief network

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基于CC2530的隐终端实验案例设计与实现

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电脑与信息技术 2024年第5期32卷 109-114页

作者：刘珩张泽堃许胜新王丹宁北京理工大学信息与电子学院北京100081

传统的通信网络和计算机网络课程在涉及无线接入技术教学时,往往侧重于纯理论模型和相关原理的阐述,在实验环节更多依赖于计算机仿真手段,很少有基于真实硬件设备的实验教学。为丰富授课内容,使学生更直观且全面地了解无线局域网及移动... 详细信息

传统的通信网络和计算机网络课程在涉及无线接入技术教学时,往往侧重于纯理论模型和相关原理的阐述,在实验环节更多依赖于计算机仿真手段,很少有基于真实硬件设备的实验教学。为丰富授课内容,使学生更直观且全面地了解无线局域网及移动自组网(Ad Hoc Network)的媒体访问控制(Media Access Control,MAC)技术,掌握隐藏终端的概念,提出了一种基于CC2530的隐终端实验案例设计与实现方式。介绍了将CC2530作为实验平台硬件的优势,阐述了实验原理,说明了实验平台的搭建、实验的实施过程和结果分析的方法。通过学习实验原理并自主地完成实验,学生能够对无线网络中的隐终端现象有更加深刻的认识。该实验也为相关课程的教师提供了教学参考。

关键词： Ad Hoc网络 MAC接入隐终端 CC2530

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基于入瞳中心的相位测量偏折术透镜波前像差测量

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光学与光电技术 2024年第2期22卷 35-46页

作者：周思旖李大海葛忍好张泽坤四川大学电子信息学院四川成都610065 四川大学空天科学与工程学院四川成都610065

为了实现高精度、高效率地对透射元件的成像质量进行检测,提出了一种基于入瞳中心的相位测量偏折术(Phase Measuring Deflectometry,PMD)测量透镜波前像差的方法。首先阐述了基于相机入瞳中心的相位测量偏折术测量波前像差的正逆光线模... 详细信息

为了实现高精度、高效率地对透射元件的成像质量进行检测,提出了一种基于入瞳中心的相位测量偏折术(Phase Measuring Deflectometry,PMD)测量透镜波前像差的方法。首先阐述了基于相机入瞳中心的相位测量偏折术测量波前像差的正逆光线模型的基本原理,然后利用zeMAX软件分别对平凸透镜和摄远物镜的波前像差进行模拟测量,模拟结果表明,与通过正逆光线追迹计算的波前像差结果相接近,验证了所提方法的可行性。最后,在实验中,分别测量了平凸透镜和自建摄远物镜的波前像差,并将该方法测量结果和干涉仪所得结果进行对比:平凸透镜测量结果与干涉仪结果的差是RMS=46.7 nm,PV=92.3 nm;摄远物镜测量结果与干涉仪结果的差是RMS=126.9 nm,PV=112.5 nm。结果表明,所提方法的测量结果与干涉仪结果基本一致。为成像透镜的像差测量提供了一种新的有效的方法。

关键词：相位测量偏折术入瞳中心波前像差透镜波前检测相机镜头

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Comparative metabolism study on chlorogenic acid,cryptochlorogenic acid and neochlorogenic acid using UHPLC-Q-TOF MS coupled with network pharmacology

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Chinese Journal of Natural Medicines 2021年第3期19卷 212-224页

作者： LI Jie WANG Shao-Ping WANG Yu-Qi SHI Lei zhang ze-kun DONG Fan LI Hao-Ran zhang Jia-Yu MAN Yu-Qing 无 School of Pharmacy Binzhou Medical UniversityYantai 264003China School of Chinese Pharmacy Beijing University of Chinese MedicineBeijing 102488China School of Pharmacy Shandong University of Traditional Chinese MedicineJinan 250300China Department of Pharmacy Binzhou Medical University HospitalBinzhou 256603China

Chlorogenic acid(5-CQA),neochlorogenic acid(3-CQA),and cryptochlorogenic acid(4-CQA),usually simultaneously exist in many traditional Chinese medicines(TCMs).However,insufficient attentions have been paid to the comparative metabolism study on these three isomeric constituents with similar effects on anti-inflammation until *** this study,a novel strategy was established to perform comparative analysis of their metabolic fates in rats and elucidate the pharmacological mechanism of ***,diagnostic product ions(DPIs)deduced from the representative reference standards were adopted to rapidly screen and characterize the metabolites in rat plasma,urine and faeces using UHPLC-Q-TOF ***,Network pharmacology was utilized to elucidate their anti-inflammatory ***,a total of 73 metabolites were detected and characterized,including 50,47 and 43 metabolites for 5-CQA,4-CQA and 3-CQA,***,the network pharmacology study indicated that these three isomeric constituents and their major metabolites with similar in vivo metabolic pathways exerted anti-inflammatory effects through co-owned 20 biological processes,which involved 10 major signal pathways and 159 potential *** study shed light on the similarities and differences of the metabolic profiling and anti-inflammatory activity among these three isomeric constituents and set an example for the further researches on the active mechanism of isomeric constituents existing in TCMs based on comparative metabolism study.

关键词： Chlorogenic acid Comparative metabolism study Isomeric constituents Anti-inflammation UHPLC-Q-TOF MS Network pharmacology

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Understand the Temperature Sensing Behavior of Solid-state Polymerized PEDOT Hybrid Based on X-ray Scattering Studies

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Chinese Journal of Polymer Science 2024年第1期42卷 105-112,I0010页

作者： Zhen-Hang He Guang-Feng Liu ze-kun Zhou Zhen Liu Yi-Shu zeng Peng zhang School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yat-sen UniversityGuangzhou 510275China Shanghai Advanced Research Institute(zhangjiang Laboratory) Chinese Academy of SciencesShanghai 201204China

Poly(3,4-ethylenedioxythiophene)(PEDOT) is one of the most successful conductive polymers that recently has been used in wearable sensors for human health monitoring. In this work, we prepared a series of PEDOT hybrids consisting of PEDOT, sodium poly(styrene sulfonate)(PSSNa) and polyethylene oxide(PEO), and their preparation could be scaled-up via an adapted solid-state polymerization process. The resistance of the as-prepared PEDOT:PSS/PEO hybrid shows clear temperature response, i.e., it decreases almost linearly with the temperature increase. To understand this phenomenon, the in situ synchrotron radiation wide-and small-angle X-ray scattering(WAXS/SAXS) characterizations were undertaken to study the temperature-dependent microstructure change of the PEDOT:PSS/PEO hybrid. It demonstrated that PEDOT formed conductive paths in the hybrids, which were not destroyed by the PEO crystallization. As temperature increased, the PEO crystals' melting and the accompanying reorganization of PEDOT chains endowed the hybrid sample temperature responsiveness. Based on these fundamental knowledges, the hybrid materials were used to fabricate flexible wearable sensor that showing temperature sensing performance with an accuracy of 1 ℃. These findings shed lights on the scalable manufacturing of wearable sensors for body temperature monitoring.

关键词： Solid-state polymerization PEDOT hybrid Structure-property correlation X-ray scattering

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Solar evaporation for simultaneous oil-water separation and electricity generation with Janus wood-based absorbers

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Frontiers of Environmental Science & Engineering 2024年第2期18卷 13-23页

作者： Yue Yang ze Fu Qi zhang Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science&TechnologyNanjing 210094China Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresCollege of Engineering and Applied SciencesKey Laboratory of Intelligent Optical Sensing and Manipulation(Ministry of Education)Jiangsu Key Laboratory of Artificial Functional MaterialsNanjing UniversityNanjing 210093China

Oily wastewater from ocean oil spills endangers marine ecosystems and human health. Therefore, developing an effective and sustainable solution for separating oil-water mixtures is urgent. Interfacial solar photothermal evaporation is a promising approach for the complete separation of two-phase mixtures using only solar energy. Herein, we report a carbonized wood-based absorber with Janus structure of comprising a hydrophobic top-layer and an oleophobic bottom-layer for simultaneous solar-driven oil-water separation and electricity generation. Under sunlight irradiation, the rapid evaporation of seawater will induce a separation of oil-water mixtures, and cause a high salt concentration region underlying the interface, while the bottom “bulk water” maintains in a low salt concentration, thus forming a salinity gradient. Electricity can be generated by salinity gradient power. Therefore, oil-water separation efficiency of > 99% and derived extra electricity power of ~0.1 W/m2 is achieved under solar radiation, demonstrating the feasibility of oil-water separation and electricity production synchronously directly using solar energy. This work provides a green and cost-effective path for the separation of oil-water mixtures.

关键词： Oily wastewater Carbonized wood Salinity gradient Electricity generation Solar irradiation

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Axial and tangential views of the acromioclavicular joint： the introduction of new projections

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Chinese Medical Journal 2012年第14期125卷 2493-2498页

作者： CHEN Wei ZHAGN Qi SU Yan-ling zhang ze-kun HOU Zhi-yong PAN Jin-she zhang Xiao-lin zhang Ying-ze Department of Orthopaedic Surgery Third Hospital of HebeiMedical University Shijiazhuang Hebei 050051 China Department of Epidemlology and Statistics Hebei MedicalUniversity Shijiazhuang Hebei 050051 China

Background Routine anteroposterior radiographs of the acromioclavicular （AC） joint with or without weight bearing have limitations in demonstrating the AC joint. Transarticular fixation with Kirschner wire is a treatment choice for AC dislocations. However, percutaneous fixation of the AC joint is technically demanding. The C-arm fluoroscopy can be used as routine intraoperative guidance to facilitate this procedure. The current study aims to introduce new projections, the axial and tangential views of AC joint, to help evaluate the severity of the injury and facilitate the percutaneous procedure. Methods Three shoulder specimens were used to find the projection directions of the axial and tangential views of the AC joint by using the digital radiography （DR） unit. The axial and tangential views were taken of 20 adult volunteers by referencing the projection directions determined in the shoulder specimens. The angles showed on the DR system and the angles between the coronal plane of the body and the vertical plane of the flat panel detector （FPD） during taking these radiographs were recorded. The C-arm fluoroscopy unit was used to take the axial and tangential views referencing the angles measured on the DR system. Routine anteroposterior radiographs of the AC joint were taken on the volunteers. The minimal distances from the distal clavicle to the acromion were measured on both tangential and anteroposterior radiographs. The data was statistically analyzed. Results The clear axial and tangential radiographs of AC joints of the volunteers were obtained using both DR and C-arm fluoroscopy units. The angles demonstrated on the DR window are （20.8±2.4）° for male and （18.3±2.3）° for female. During taking the axial views, the angles between the coronal plane of the body and vertical plane of FPD are （23.3±3.2）° for male and （20,1±2.4）° for female. During taking tangential views, the corresponding angles are （117.5±3.7）° for male and （113.1±3.3）° for female. On the tange

关键词： acromioclavicularjoint axial view, tangential view, dislocation, percutaneous fixation

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A Fair and Trusted Trading Scheme for Medical Data Based on Smart Contracts

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Computers, Materials & Continua 2024年第2期78卷 1843-1859页

作者： Xiaohui Yang kun zhang School of Cyber Security and Computer Hebei UniversityBaoding071000China

Data is regarded as a valuable asset,and sharing data is a prerequisite for fully exploiting the value of ***,the current medical data sharing scheme lacks a fair incentive mechanism,and the authenticity of data cannot be guaranteed,resulting in low enthusiasm of participants.A fair and trusted medical data trading scheme based on smart contracts is proposed,which aims to encourage participants to be honest and improve their enthusiasm for *** scheme uses zero-knowledge range proof for trusted verification,verifies the authenticity of the patient’s data and the specific attributes of the data before the transaction,and realizes privacy *** the same time,the game pricing strategy selects the best revenue strategy for all parties involved and realizes the fairness and incentive of the transaction *** smart contract is used to complete the verification and game bargaining process,and the blockchain is used as a distributed ledger to record the medical data transaction process to prevent data tampering and transaction ***,by deploying smart contracts on the Ethereum test network and conducting experiments and theoretical calculations,it is proved that the transaction scheme achieves trusted verification and fair bargaining while ensuring privacy protection in a decentralized *** experimental results show that the model improves the credibility and fairness of medical data transactions,maximizes social benefits,encourages more patients and medical institutions to participate in the circulation of medical data,and more fully taps the potential value of medical data.

关键词： Blockchain data transactions zero-knowledge proof game pricing

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A review on vanadium extraction techniques from major vanadium-containing resources

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Rare Metals 2024年第9期43卷 4115-4131页

作者： Yin-Hui Wang Yi-Fan Wang Yu-Ting Li Chang Wu Xiu-Li Han Ning-Ning Zhao ze-kun zhang Lei Dai Ling Wang zhang-Xing He College of Mining Engineering North China University of Science and TechnologyTangshan 063210China Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources Tangshan 063210China College of Chemical Engineering North China University of Science and TechnologyTangshan 063009China

The critical role of vanadium in metallurgy and the increasing commercialization of vanadium redox flow batteries have contributed to a rise in market demand for vanadium,emphasizing the need to ensure the sustainability of vanadium *** vanadium slag and stone coal,generated during the smelting process of vanadium–titanium magnetite,serve as primary raw materials for vanadium *** paper reviews the process mineralogy of converter vanadium slag and stone coal,encompassing the chemical and physical phase compositions of the raw materials and the state of vanadium *** aim is to establish a theoretical foundation for the mechanistic study of the vanadium extraction techniques and to provide a reference for the optimization of the process *** paper systematically summarizes the current vanadium extraction technology from converter vanadium slag,covering roasting,direct leaching,sub-molten salt method,and the technology and research status of vanadium extraction from stone *** importantly,it identifies key issues in the current vanadium extraction techniques and challenges faced in actual production,based on the analysis of the current vanadium extraction process and mechanism *** forward feasibility and prospects for the development of vanadium extraction technology are outlined.

关键词： Converter vanadium slag Stone coal Process mineralogy Vanadium extraction process Mechanism research

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Integrated Active Suspension and Anti-Lock Braking Control for Four-Wheel-Independent-Drive Electric Vehicles

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Chinese Journal of Mechanical Engineering 2024年第1期37卷 87-98页

作者： ze Zhao Lei zhang Xiaoling Ding Zhiqiang zhang Shaohua Li Liang Gu National Engineering Research Center for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China

This paper presents an integrated control scheme for enhancing the ride comfort and handling performance of a four-wheel-independent-drive electric vehicle through the coordination of active suspension system(ASS)and anti-lock braking system(ABS).First,a longitudinal-vertical coupled vehicle dynamics model is established by integrating a road input *** the coupling mechanisms between longitudinal and vertical vehicle dynamics are *** ASS-ABS integrated control system is proposed,utilizing an H∞controller for ASS to optimize load transfer effect and a neural network sliding mode control for ABS ***,the effectiveness of the proposed control scheme is evaluated through comprehensive tests conducted on a hardware-in-loop(HIL)test *** HIL test results demonstrate that the proposed control scheme can significantly improve the braking performance and ride comfort compared to conventional ABS control methods.

关键词： Four-wheel-independent-drive electric vehicles Active suspension system(ASS) Anti-lock braking system(ABS) Vertical-longitudinal vehicle dynamics

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