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dynamic compression characteristics of fiber-reinforced shoe press belts

Tappi Journal 2025年第APR期2025卷 203-212页

作者： Wegele, Patrick Söderberg, L. daniel KTH Royal Institute of Technology Stockholm Sweden R&D engineer for J.M. Voith SE & Co. KG Heidenheim Germany Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm Sweden

Shoe press belts contribute significantly to the overall dewatering performance in the press section of a paper machine. Within the shoe press nip, the press belt faces a dynamic and multidimensional load that mainly leads to a compression of the structure. As this will cause a loss in void volume, knowledge of the dynamic compression characteristics of shoe press belts is crucial for optimized dewatering. A novel method was developed to examine the dynamic compression characteristics of grooved polyurethane press belts. Therefore, an experimental setup allowing realistic boundary conditions to test specimens was placed in a servo-hydraulic testing machine. Press belt specimens with different matrix material formulations and groove patterns were tested under varying load rates equivalent to different paper machine operational speeds. The results showed an evident sensitivity of the dynamic compression stiffness to the operational speed of the paper machine. This behavior was seen to be more sensitive to changes in the matrix material formulation than to adaptions of the groove pattern. As a result, the compression of the press belt within a shoe press nip is not only influenced by the peak pressure within the shoe press nip but also depends on the operational speed of the paper machine. Application: This study helps readers understand the impact of paper machine speed on the compression of shoe press belts, allowing them to choose a shoe press belt that provides optimized dewatering performance under specific operational conditions. © TAPPI Press 2025.

关键词： Paper products

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Anion exchange membranes with a semi-interpenetrating polymer network using 1,6-dibromohexane as bifunctional crosslinker

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Chinese Journal of Chemical engineering 2024年第8期72卷 199-208页

作者： Aijie Li Zhanliang Wang Zhihao Si Lu Lu Peipei Huang Jinhong Liu Songyuan Yao Peiyong Qin Xinmiao Zhang National Energy R&D Center for Biorefinery College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China Paris Curie Engineer School Beijing University of Chemical TechnologyBeijing 100029China Environmental Protection Research Institute Beijing Research Institute of Chemical IndustryBeijing 100000China

An anion exchange membrane(AEM)is generally expected to possess high ion exchange capacity(IEC),low water uptake(WU),and high mechanical strength when applied to electrodialysis *** different types of AEMs,semi-interpenetrating polymer networks(SIPNs)have been suggested for their structural superiorities,i.e.,the tunable local density of ion exchange groups for IEC and the restrained leaching of hygroscopic groups by insolubility for ***,the conventional SIPN AEMs still struggle to balances IEC,WU,and mechanical strength simultaneously,due to the lack of the compact crosslinking *** this work,we proposed a novel SIPN structure of polyvinylidene difluoride/polyvinylimidazole/1,6-dibromohexane(PVdF/PVIm/dBH).On the one hand,dBH with two cationic groups of imidazole groups are introduced to enhance the ion conductivity,which is different from the conventional monofunctional modifier with only one cationic *** the other hand,dBH has the ability to bridge with PVIm,where the mechanical strength of the resulting AEM is increased by the increase of crosslinking *** show that a low WU of 38.1%to 62.6%,high IEC of 2.12—2.22 mmol·g^(-1),and excellent tensile strength of 3.54—12.35 MPa for PVdF/PVIm/dBH membrane are *** work opens a new avenue for achieving the high-quality AEMs.

关键词： Anion exchange membrane Polyvinylidene difluoride Electrodialysis Semi-interpenetrating polymer networks

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deep neural network-based tools for hotel marketing activities of online travel agents

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Multimedia Tools and Applications 2025年 1-24页

作者： Keles, Ali Keles, Ayturk Keles, Mustafa Berk Mutlu, Behçet Department of Computer Education and Instructional Technology Faculty of Education Agri Ibrahim Cecen University Agri04100 Turkey Machine Learning Engineer *** Istanbul Turkey Director of Technology R&D Center *** Istanbul Turkey Department of Computer Engineering Gebze Technical University Kocaeli Turkey

Vacationers always want to choose the hotel that best meets their needs and expectations. For this, they typically use online travel agents (OTAs). OTAs must analyze millions of images from thousands of hotels quickly and classify them accurately to best meet demands. This is a highly complex and challenging task. OTAs also have to choose a default image to represent best way each hotel in order to best market hotels to vacationers and encourage click behavior. This is another challenge to overcome. The biggest problem in classifying millions of images from different areas of hotels is that these areas often have similar objects and environments. For this reason, fewer categories have been used in deep learning (dL) studies conducted so far. In this study, two deep neural networks (dNN) have been developed to accomplish these challenging tasks. The first network is the "hotel image classification network" (HICNet), which classifies images of different areas of hotels into 11 categories. In a multi-class classification task that includes closely related categories such as bar, food, and lobby, the HICNet network achieved very good results, reaching an average of 79% precision, sensitivity, and F1-score. The second network is the "hotel default image network" (HdINet), which enables the determination of a default image for each hotel on the OTA page. HdINet can accurately identify the default image of hotels with an average of 92% precision, sensitivity, and F1-score. These networks have been integrated into the OTA system named *** and are currently in active use. © The Author(s) 2025.

关键词： Hotels

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Comparison of Various Control Techniques for Path Control of Mobile robots

Comparison of Various Control Techniques for Path Control of...

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Cognitive Computing in engineering, Communications, Sciences and Biomedical Health Informatics (IC3ECSBHI), International Conference on

作者： Jyoti Singh Nidhi Singh Alok deep Department of Electrical Engineering Gautam Buddha University Greater Noida India R&D Engineer Deep Technology Gurgaon India

ISBN: (数字)9798331518523

ISBN: (纸本)9798331518530

This paper presents mobile robot navigating towards a target while subjected to random disturbance in the path of mobile robot. Various control strategies, including Proportional-Integral-derivative (PId) control, Adaptive Control, Sliding Mode Control (SMC) and Model Predictive Control (MPC) were implemented and evaluated. The results indicate significant differences in performance, with each control strategy exhibiting unique strengths and weaknesses in handling disturbances. This study contributes to the understanding of robotic control systems in uncertain environments.

关键词： Target tracking PI control Accuracy Navigation Trajectory Mobile robots Pd control Adaptive control Sliding mode control Predictive control

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Automated Vision-Based Fatigue Crack Growth Monitoring Based on Background Subtraction

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SN Computer Science 2023年第5期4卷 670页

作者： Shen, Ligang Soliman, Mohamed R&D Engineer II Ansys Inc. Canonsburg PA United States School of Civil and Environmental Engineering College of Engineering Architecture and Technology Oklahoma State University Stillwater OK United States

Fatigue cracks commonly occur in structures subjected to cyclic loading. These cracks may lead to catastrophic structural failure once their size reaches the critical level. The accurate identification of the crack growth parameters of the material is essential for predicting the crack growth and the service life. Several approaches can be utilized for monitoring the fatigue crack growth given the requirements of the application. Traditional approaches such as the optical, compliance, and electric potential difference methods, usually require intensive labor and are difficult to automate. Other alternatives, like infrared thermography and digital image correlation, may require costly equipment and complex setups, in addition to the high level of training necessary to operate the equipment and interpret the results. To address these issues, this paper proposes an automated vision-based fatigue crack growth monitoring approach that utilizes the background subtraction algorithm. The approach treats the fatigue crack growth increment between detection intervals as an intruding object and identifies it within a series of successive images. The narrow field of view of the utilized microscope is expanded to accommodate the whole crack size by automated adjustment of the microscope location based on the identified crack tip location. The accuracy of the proposed approach was verified by fatigue tests on middle tension specimens under constant and variable amplitude fatigue loading. The crack monitoring process was conducted automatically in a real-time manner which reduced the potential for human-induced measurement errors. © 2023, The Author(s), under exclusive licence to Springer Nature Singapore Pte Ltd.

关键词： Background subtraction Computer vision Crack growth Fatigue Image processing Monitoring

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Person Location Tracking Using Global Positioning System and ESP8266 with Internet of Things

Person Location Tracking Using Global Positioning System and...

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International Conference on Futuristic Communication and Network Technologies, CFCNT 2020

作者： Umapathi, N. Sabbani, Saiteja Poovarasan, S. Department of ECE Jyothismathi Institute of Technology & Science Karimnagar Telangana India R&D Engineer Error Free Solutions Erode Tamil Nadu India

ISBN: (纸本)9789811646249

This paper explores the idea of locating the student’s location within the organization/institute. This is done by using a GPS-based receiver modem attached to Id card of student and using a SQL coded database. Initially, the system is provided with all the coordinates of the places within organization/institute, and these coordinates (latitude, longitude and altitude) are stored in a lookup table (LUT) in the database. When the student with the GPS receiver roams inside the campus, his coordinates are recorded by the GPS modem and sent to the database via Internet (cellular/Wi-Fi network). This coordinates are then compared with the coordinates in the LUT;if the coordinates are matched with any of the contents in LUT, then the system identifies this and knows the location of student;otherwise, the student is considered as out of campus. Any authorized person can access this data, i.e., students’ location at any time by either Web site or the application provided to the person by entering the unique Id number of the person who is to be tracked. Programming the NodeMCU has been developed in C environment with a self-made SQL database and person location data transfer to Internet of things using ThingSpeak software. This ThingSpeak software is used for the development of application. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Global positioning system

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Modes of multi-mechanistic gas diffusion in shale matrix at varied effective stresses:Observations and analysis

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Petroleum Science 2023年第5期20卷 2908-2920页

作者： Tian-Yu Chen Yan-Yu Hao derek Elsworth Hong-Ming Zhang Zhi-Ming Hu Guang-Lei Cui Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines School of Resources and Civil Engineering and Key Laboratory of Liaoning Province on Deep Engineering and Intelligent TechnologyNortheastern UniversityShenyang110819LiaoningChina National Energy Shale Gas R&D(experiment)Center Langfang065007HebeiChina Department of Energy and Mineral Engineering EMS Energy Institute and G3 CenterPennsylvania State UniversityUniversity ParkPA16802USA Research Institute of Petroleum Exploration&Development PetroChina Company LimitedBeijing100084China

Gas diffusion in the shale matrix has a dominant effect on late-stage production from shale gas ***,adequate research on the mechanisms and contributions of gas diffusion for varied pore size populations in shale matrix under recreated in situ stress is *** report gas-diffusion measurements under constant in situ stress but variable gas pressures for contrasting non-adsorbent(helium(He))and adsorbed(methane(CH_(4)))gases to investigate the impact of effective stress on the evolution of dominant mechanisms of *** intact sample replicates true pore-network topology and diffusion *** integrated diffusion model is proposed that combines the effects of slip flow,Knudsen flow,and surface diffusion to constrain the evolution of these flow regimes and their respective contributions to the observational ***,a probability density function(PdF)is employed to separate the gas content distributions of macropores and micropores from the total gas content and to investigate gas contributions in various *** results reveal that the diffusion coefficients of both He and CH_(4) in macropores and micropores increase with gas pressure but decrease with increasing effective *** diffusion coefficients of He and CH_(4) are different in macropores but remain nearly the same in *** diffusion coefficients of slip flow and surface diffusion increase with decreasing effective stress except for CH_(4) diffusion in the micropores,while the evolution of Knudsen diffusion shows the opposite *** flow plays a dominant role in He and CH_(4) diffusion within macropores(pore size 45 nm).Knudsen diffusion gradually becomes significant for He diffusion in the micropores(pore size 4 nm),conversely,for CH_(4) diffusion in the micropores,surface diffusion becomes *** to gas production from reservoirs,the contributions of the micropores will increase gradually with the duration of gas recovery,indicating the significan

关键词： diffusion coefficient In situ stress Varied pore types diffusion mechanisms Gas-content contributions

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In-situ construction of epitaxial phase for boosting zinc nucleation on three-dimensional interface

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Progress in Natural Science:Materials International 2024年第3期34卷 578-584页

作者： Xin He Zhe Zhu Xiaoqiao Liao Kai Yang Yixue duan Linfeng Lv Chuan Zhao Wei Zhao Jibing Chen Peng Tian Xiaoyu Liu Liang He School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Sichuan University School of Chemistry Faculty of Science University of New South Wales School of Materials Science and Engineering Sichuan University of Science & Engineering School of Mechanical Engineering Wuhan Polytechnic University Med+X Center for Manufacturing West China Hospital Sichuan University Yibin Industrial Technology Research Institute of Sichuan University Yibin R&D Park of Sichuan University

Interface modification of zinc（Zn） metal anode with conductive three-dimensional（3d） structure is widely utilized in zinc ion batteries. However, the uniformity of zinc nucleation on surface microstructure is rarely investigated which exacerbates the tip effect and raises unstable risk. Herein, a strategy via the initial copper（Cu）alloying and following sulfurization treatment is reported to accomplish boosted uniform nucleation of zinc on the modified layer with dense microstructures. This epitaxial sulfide phase not only improves the wetting area to revitalize the microstructural surface, but also forms a bifunctional zincophilic Cu2S/CuZn alloy interface layer,which combines the merits of guided local ions diffusion and improved zinc nucleation environment. As a result, a homogeneous growth of zinc on the 3d structural substrate can be realized, and cycling stability of the achieved Cu2S/CuZn electrode with a practical capacity of 1 mAh cm-2under 1 mA cm-2or amplified current density of 10 mA cm-2is significantly enhanced. This work provides an epitaxial strategy in constructing a bifunctional zincophilic interface layer for boosting zinc nucleation, and offers a new perspective on the modification of 3d surface structure for stabilization of zinc anode.

关键词： Zn anode Hydrophilicity Sulfide CuZn alloy Zn metal battery

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Study of Complex Servo Gripper for Industrial Applications 8

Study of Complex Servo Gripper for Industrial Applications

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8th IEEE International Conference on engineering Technologies and Applied Sciences, ICETAS 2023

作者： Fotuhi, Mohammad Javad Ozbay, Fatih Hazem, Zied Ben KeramikMakina Sanayi VeTicaret A.S. R&d Design and Innovation Engineer Gebze Turkey Institute of Science and Technology Yildiz Technical University Department of Mechanical Engineering Istanbul Turkey College of Engineering University of Technology Bahrain Department of Mechatronics Engineering Salmabad Bahrain

ISBN: (纸本)9798350327090

The objective of this work is to study the performance of an industrial complex servo gripper mechanism (ICSGM) in terms of position and speed. This aim is to design and develop an ICSGM that will have the potential to reach a high number of demands in the automation and robotic industries. In the palletizing industry, the design and control of the robotic grippers are the essential part of a system. depending on the application, different types of holders and movements may be required to pick and place the products. This servo gripper includes a combination of angular mechanism and parallel mechanism, this gripper system that allows linear and angular motions for pick and place operations is investigated for design and control purposes. The drive system of the gripper allows the controller to move the system both angularly and linearly. The performance of the ICSGM mechanism is based on comparing its position error and response time with the parallel mechanism and angular mechanism. The position efficiency of these ICSGM is calculated from the position root mean square error (PrMSE). It is the difference of errors between the two measured position signals (input signal from the incremental encoder and output signal from the linear encoder). In this paper, the Force-PId (Proportional-Integral-derivative) controller is developed in PLC with Siemens SCL programming language. The Controller input is the position error and error rate. In addition, system analysis by inventor software design is included in the study. In the experimental setup, an asynchronous motor and 2048 pulse incremental encoders have been used. Finally, the positioning efficiency of these ICSGM is examined and compared under different working plan circumstances. © 2023 IEEE.

关键词： Efficiency

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Study of Fuzzy Control for Pitch and Yaw Angles of Two-degrees-of-Freedom Helicopter System 8

Study of Fuzzy Control for Pitch and Yaw Angles of Two-Degre...

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8th IEEE International Conference on engineering Technologies and Applied Sciences, ICETAS 2023

作者： Cakir, Mehmet Fotuhi, Mohammad Javad Hazem, Zied Ben Institute of Science and Technology Yildiz Technical University Department of Avionic Engineering Istanbul Turkey R&d Design and Innovation Engineer KeramikMakina Sanayi VeTicaret A.S. Gebze Turkey College of Engineering University of Technology Bahrain Department of Mechatronics Engineering Salmabad Bahrain

ISBN: (纸本)9798350327090

In this paper, PId (Proportional-Integral-derivative), cascade, and fuzzy logic controller (FLC) controllers are developed for the Pitch and Yaw angles of a two-degrees-of-freedom helicopter system (2-dOF HS). Two different FLCs are used for Pitch and yaw angles in order to provide the output speed. A Mamdani-type FLC is implemented for the 2-dOF HS. The inputs of FLC are position error and rate of errors. The FLC is developed to give accurate results in terms of time domain specifications compared to PId and cascade controllers. All controllers have been established in MATLAB/ SIMULINK to test their control performance. According to the obtained simulation results, the FLC returns accurate control results, and robustness to eliminate the external disturbances. © 2023 IEEE.

关键词： Controllers

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