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SSrN 2023年

作者： Liu, Peng Zhi, Weiting Mao, Jianfeng Liu, Lei Chen, Ying Yu, Zhiwu He, Sasa Zhang, Ning Hu, Cheng School of Civil Engineering Central South University 22 Shaoshan Road Changsha410075 China National Engineering Research Center for High Speed Railway Construction Changsha410075 China School of Civil Engineering Central South University of Forestry and Technology 498 Shaoshan Road Changsha410004 China School of Physical and Technology YiLi Normal University 448 Jiefang West Road Yining835000 China Central South University China Hunan Aircraft Landing System Technology R&D Co. Ltd. 29 Qingzhuhu Road Changsha410153 China

This study investigated the tensile and bonding properties between cement-based grouting materials (CBGM) and high-strength bolts. The associated failure mechanism, load-slip curve, ultimate pull-out load and bond stress were also studied. The effects of anchorage length and square steel tube restraint on the bonding properties were explored on the basis of 24 specimens central pull-out testing, and a bond stress-slip constitutive relationship model between high-strength bolts and CBGM was proposed. The results indicate that with the increase of the anchorage length of high-strength bolts, the failure mode of specimens can be divided into three types: the fracture failure of high-strength bolt was occurred with the anchorage lengths ranging from 18 d to 31 d;when the anchorage length was less than 15 d, the specimen occurred splitting failure with the constraint of square steel tube, and the high-strength bolt occurred pull-out failure without the constraint of square steel tube. When the high-strength bolt occurred the tensile failure, the ultimate pull-out load remains a constant and the bond stress decreases as the increase of the anchorage length of high-strength bolt. due to the lateral constrained effect of the square steel tube, the CBGM embodies a three-dimensional stress state, which can delay the generation and development of the internal cracks, and enhance the bond strength. A calculation formula was proposed to determine the bond strength between high-strength bolt and CBGM, and a constitutive model of the bond stress-slip constitutive relationship was also modeled. © 2023, The Authors. All rights reserved.

关键词： Mortar

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Performance Analysis of relay Based NOMA cooperative Transmission under cognitive radio Network

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computers, Materials & continua 2020年第4期63卷 197-212页

作者： Yinghua Zhang Jian Liu Yunfeng Peng Yanfang dong Guozhong Sun Hao Huang Changming Zhao School of Computer and Communication Engineering University of Science and Technology BeijingBeijing100083China Dawning Information Industry(Beijing)Co. Ltd.Beijing100083China Higon Austin R&D Center AustinTX 78746USA School of Computer Science Chengdu University of Information TechnologyChengdu610225China College of Computer Science Sichuan UniversityChengdu610041China

This paper proposes a hybrid spectrum accessing mechanism by using NOMA-based cooperative transmission and beam-forming *** this mechanism,the secondary user employs spectrum-sensing technology to detect the existence of the primary *** the primary user does not exist,the secondary source user directly transmits data to the destination *** the primary user exists,the secondary source user finds the optimal relay according to certain selection principle before transmitting data to the destination user through the chosen relay *** the signal receiving stage,the secondary user takes use of beam-forming technology to receive the signal from both the secondary source and the secondary relay *** the interference from the primary user is cancelled out in the ***,the outage probability for secondary user in the proposed mechanism is theoretically ***,the simulation results show that compared with the traditional mechanism,the proposed system model can not only guarantee the continuity of secondary transmission,but also significantly reduce the outage probability of secondary transmission.

关键词： relay selection outage probability NOMA QoS signal-to-interference-plus-noise rate(SINr) beam-forming

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A new method to detect influx and loss during drilling based on machine learning

A new method to detect influx and loss during drilling based...

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International Petroleum technology conference 2019, IPTC 2019

作者： Shi, Xiaoyan Zhou, Yingcao Zhao, Qing Jiang, Hongwei Zhao, Liping Liu, Yong Yang, Guang CNPC Engineering Technology R and D Co. Ltd China Petro China Tarim Oilfield Company China

ISBN: (纸本)9781613996195

Influx and loss are the two most common downhole complexities. They not only cause the reservoir damage, increase the exploration cost, reduce the drilling efficiency;but also induce major malignancy. Therefore accurate and early detection of influx and loss during drilling is of great significance. Traditional influx and loss detection methods have the shortcoming of monitoring time lagging and high costs. As the rapid development of artificial intelligence techniques, researchers start to detect influx and loss using artificial intelligence method. This work adopted two machine learning algorithms(random forests and Support vector machine) according to their characteristics to detect influx and loss during drilling in real-time. The detection methods includes four steps: 1) Generating raw influx/loss raw data set by combining real-time drilling data and drilling history data;2) Pre-processing raw data set to obtain training data set;3) Training classification model of random forests and SVM by training data set and algorithms;4) Predicting influx/ loss by the trained model according to the new real-time data. The case study shows that influx and loss can be detected accurately in early stage by both random forests method and SVM method after proper pre-processing the raw data and optimizing algorithm parameters. The detection accuracy of the sample data from four wells exceeds 90%. This work demonstrate a new way to detect influx and loss by utilizing huge drilling data and machine-learning algorithms, and the detection results are satisfying. © 2019, International Petroleum technology conference

关键词： Support vector machines

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Self-adaptive vision-language model for 3d segmentation of pulmonary artery and vein

arXiv

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arXiv 2025年

作者： Guo, Xiaotong Yang, deqian Wang, dan Zhao, Haochen Li, Yuan Sui, Zhilin Zhou, Tao Zhang, Lijun Meng, Yanda State Key Laboratory of Computer Science Institute of Software Chinese Academy of Sciences China Department of Thoracic Surgery National Clinical Research Center for Cancer Cancer Hospital Shenzhen Hospital China School of Intelligent Science and Technology Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310024 China R&D Center Guangxi Huayi Artificial Intelligence Medical Technology Co. Ltd. China School of Computer Science and Engineering Beihang University Beijing China Department of Computer Science University of Exeter Exeter United Kingdom Department of Cardiovascular & Metabolic Medicine University of Liverpool Liverpool United Kingdom Guangzhou Jiayi Software Technology Co. Ltd. China

Accurate segmentation of pulmonary structures is crucial in clinical diagnosis, disease study, and treatment planning. Significant progress has been made in deep learning-based segmentation techniques, but most require much labeled data for training. consequently, developing precise segmentation methods that demand fewer labeled datasets is paramount in medical image analysis. The emergence of pre-trained vision-language foundation models, such as CLIP, recently opened the door for universal computer vision tasks. Exploiting the generalization ability of these pre-trained foundation models on downstream tasks, such as segmentation, leads to unexpected performance with a relatively small amount of labeled data. However, exploring these models for pulmonary artery-vein segmentation is still limited. This paper proposes a novel framework called Language-guided self-adaptive Cross-Attention Fusion Framework. Our method adopts pre-trained CLIP as a strong feature extractor for generating the segmentation of 3d CT scans, while adaptively aggregating the cross-modality of text and image representations. We propose a s pecially designed adapter module to fine-tune pre-trained CLIP with a self-adaptive learning strategy to effectively fuse the two modalities of embeddings. We extensively validate our method on a local dataset, which is the largest pulmonary artery-vein CT dataset to date and consists of 718 labeled data in total. The experiments show that our method outperformed other state-of-the-art methods by a large margin. Our data and code will be made publicly available upon acceptance. copyright © 2025, The Authors. All rights reserved.

关键词： Visual languages

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Vibration mechanism analysis and algorithm optimization of contactor contact system

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Journal of Measurement Science and Instrumentation 2021年第4期12卷 396-404页

作者： HUANG Kepeng WANG Fazhan ZHAO Mingji GUO Baoliang OU daquan College of Mechanical and Electrical Engineering Xi’an University of Architecture & Technology Xi’ an 710055 China Technology R&D Center ABB Xinhui Low-Voltage Switchgear Co. Ltd. Jiangmen 529089 China

In order to solve the problem of vibration bounce caused by the contact between moving and stationary contacts in the process of switching on,two-degree-of-freedom motion differential equation of the contact system is *** algorithm is used to optimize the pull in process of AC *** whole process of contact bounce was observed and analyzed by high-speed photography *** theory and experimental results were very *** iron core has collided before the contact is separated,which further aggravates the contact *** the iron core bounces collided again,the bounce of the contact was not *** the operation of the contactor,the movement of the moving iron core will cause slight vibration of the *** contact bounce time and the maximum amplitude are *** research results provide a theoretical basis for further control and reduction of contact bounce.

关键词： electrical switch contact bounce two-degree-of-freedom motion differential equation algorithm optimization high-speed photography

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Microbiome-metabolome integration reveals fermentation-driven divergence in bioactive compound profiles of Cardamine violifolia leaf pickles

Current Research in Food Science

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Current research in Food Science 2025年

作者： Jue Gong Shen rao Xiaomeng Liu Shuiyuan Cheng Xin cong dingxiang Zhu National R&D Center for Se-rich Agricultural Products Processing Technology Wuhan Polytechnic University Wuhan 430048 China Enshi Se-Run Material Engineering Technology Co. Ltd Enshi 445000 China

Cardamine violifolia is an emerging cruciferous vegetable rich in nutrients and bioactive components. This study investigated the microbial community and metabolite profiles in C . violifolia leaf pickles prepared using three fermentation methods: natural fermentation (NF), inoculation with Lactiplantibacillus plantarum (LP), and inoculation with Leuconostoc mesenteroides (LM). results revealed that fermentation significantly altered the microbial composition, with Firmicutes becoming the dominant phylum. Lactococcus and Weissella were predominant in both the NF and LM groups, while Lactiplantibacillus dominated in the LP group. Metabolomic analysis identified 865 metabolites in total, with amino acids, lipids, and alkaloids representing the most abundant classes. Fermentation enhanced the production of bioactive compounds (e.g., alkaloids, phenolic acid, flavonoids) , particularly in the LP group. correlation analysis indicated a strong relationship between specific microorganisms and active metabolites. These findings suggest that fermentation not only improved the edible and nutritional value of C. violifolia leaf pickles but also enhanced their potential health benefits.

关键词： Cardamine violifolia differences metabolites microbial community pickling

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dual-Polarized Broad-Beam reflective Metasurface based on Multi-Sheet configuration for Local 5G Application at 28.25 GHz

Dual-Polarized Broad-Beam Reflective Metasurface based on Mu...

引用

European conference on Antennas and Propagation, EuCAP

作者： Tanan Hongnara Yoshiki Shirasawa Takayoshi Sasaki Katsumori Sasaki Keisuke Sato Ichiro Oshima Naobumi Michishita Hiroaki Nakabayashi Keizo Cho Mobile Communication Engineering R&D DKK Co. Ltd. Kanuma Japan National Defense Academy Yokosuka Kanagawa Japan Chiba Institute of Technology Narashino Chiba Japan

In order to simply broaden reflection beam of metasurface, the utilization concept of multi-sheet configuration is presented and investigated. demonstration is based on four sheets of 28.25 GHz metasurface that have the same designed incident angle. Meanwhile, their reflection angles are designed to be moderately different for producing broad reflection beam. In full wave simulation, the combined metasurface perform broad-beam operation in corresponding to individual reflection angle of each metasurface. Then, in coverage area measurement of local 5G system, multi-sheet metasurface provides wider coverage with compact installation space comparing to conventional metallic reflector.

关键词： 5G mobile communication Area measurement Europe Metasurfaces reflector antennas Extraterrestrial measurements reflection

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A Clinical Feasibility Study of a Photoacoustic Finder for Sentinel Lymph Node Biopsy in Breast Cancer Patients

SSRN

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SSrN 2025年

作者： Han, Moongyu Lee, Youngjoo Ahn, Junho Kim, Minseong Nam, Sunghun Park, Jeongwoo Ahn, Joongho ryu, Hanyoung Seo, Youngseok Park, Byullee Kim, dooreh Kim, Chulhong Convergence IT Engineering Department of Electrical Engineering Mechanical Engineering and Medical Science and Engineering Medical Device Innovation Center Pohang University of Science and Technology 77 Cheongamro Nam-Gu Pohang37673 Korea Republic of Department of Surgery Seoul St. Mary's Hospital College of Medicine the Catholic University of Korea 222 Banpo-daero Seocho-gu Seoul06591 Korea Republic of Department of Biomedical Convergence Science and Technology Kyungpook National University Daegu Korea Republic of R&D Center Wontech Co. Ltd Techno 8-ro Yuseong-gu Daejeon34028 Korea Republic of Department of Biophysics Institute of Quantum Biophysics Sungkyunkwan University 2066 Seobu-ro Jangan-gu Gyeonggi-do Suwon-si16419 Korea Republic of

The standard method for detecting sentinel lymph nodes (SLNs) requires injecting radioactive material and using a gamma probe to locate them. However, this approach has several issues due to the use of radioactive material. We have developed a photoacoustic finder (PAF) that detects SLNs using only blue dye, without radioactive material. In this study, we validate the performance of PAF by comparing its detection rate with that of standard methods in 375 lymph nodes resected from 121 breast cancer patients. The results demonstrated that the SLN detection rates of the gamma probe and PAF were comparable, with non-inferiority analysis indicating that PAF's performance was not inferior to the standard detection method. These findings suggest that PAF could alleviate the issues associated with the traditional radiological SLN biopsy. © 2025, The Authors. All rights reserved.

关键词： Probes

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A functional hyperbranched binder enabling ultra-stable sulfur cathode for high-performance lithium-sulfur battery

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Journal of Energy Chemistry 2020年第11期29卷 63-72页

作者： Xiang Luo Xianbo Lu Xiaodong Chen Ya Chen Chunyang Yu dawei Su Guoxiu Wang Lifeng Cui School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808GuangdongChina Center for Clean Energy Technology School of Mathematical and Physical ScienceFaculty of ScienceUniversity of Technology SydneyNSW 2007Australia R&D Center Shanghai Kingfa Sci.&Tech.Co.Ltd.Shanghai 201714China Department of Applied Chemistry School of ScienceXi'an Jiaotong UniversityXi'an 710049ShaanxiChina School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China School of Chemistry&Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Binders are of vital importance in stabilizing the cathodes to enhance the cycling stability of lithiumsulfur(Li-S) batteries. However, conventional binders are typically confronted with the drawback of inability for adsorbing lithium polysulfide(Li PS), thus resulting in severe active material losing and rapid capacity fading. Herein, a novel water-soluble hyperbranched poly(amidoamine)(HPAA) binder with controllable hyperbranched molecular structure and abundant amino end groups for Li-S battery is designed and fabricated, which can improve efficient adsorption for Li PS and stability of the sulfur cathodes. Besides, the strong intermolecular hydrogen bonds in HPAA binder can contribute to the structural stability of S cathode and integration of the conductive paths. Therefore, the Li-S battery with this functional binder exhibits excellent cycle performance with a capacity retention of 91% after 200 cycles at 0.1 *** at a high sulfur loading of 5.3 mg cm-2, a specific capacity of 601 mA h g-1 can also be *** functional theory(dFT) calculation further demonstrates that the enhanced electrochemical stability derives from the high binding energy between amino groups and LiP S and the wide electrochemical window(6.87 e V) of HPAA molecule. Based on the above all, this functional polymer will lighten a new species of binders for eco-friendly sulfur cathodes and significantly promote the practical applications of high-performance Li-S batteries.

关键词： Functional binder Hyperbranched polymer Sulfur cathode Polysulfide adsorption Lithium-sulfur battery

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A novel lead-free Na_(0.5)Bi_(0.5)TiO_(3)-based ceramic with superior comprehensive energy storage and discharge properties for dielectric capacitor applications

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Journal of Materiomics 2020年第4期6卷 743-750页

作者： da Li Ying Lin Qibin Yuan Miao Zhang Liang Ma Haibo Yang Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’an710021China School of Electronic Information&Artificial Intelligence Shaanxi University of Science and TechnologyXi’an710021China Xianyang Non-metallic Mineral R&D Institute Co. LtdXianyang712021China

Na_(0.5)Bi_(0.5)TiO_(3)(NBT)-based ceramics have been widely used as dielectric materials for energy storage capacitors because of their environmental friendliness and excellent ferroelectric ***,their energy storage performance still needs to be further improved to satisfy the increasing ***,we report a novel 0.90(Na_(0.5)Bi_(0.5))0.7Sr_(0.3)TiO_(3-0.10)Bi(Ni_(0.5)Sn_(0.5))O_(3)(0.90NBST-0.10BNS)ceramic with significantly improved energy density(5.0 J cm3),enhanced recoverable energy density(4.18 J cm^(3))and high energy efficiency(83.64%)through the incorporation of Bi(Ni0.5Sn0.5)O3(BNS),due to the increased breakdown strength and the relaxation ferroelectric(rFE)*** first-order reversal curve(FOrC)measurements confirm that the addition of BNS improves rFE properties by breaking the order of long-range *** 0.90NBST-0.10BNS ceramic also possesses an outstanding temperature and frequency stability of energy storage properties in the range of 20C e140C and 1 Hze100 Hz,*** importantly,the discharge properties characterized by a preeminent power density(36.19 MW cm^(3)),transient energy release times(144.2 ns),and high discharge energy density(1.16 J cm3)also synchronously observed in 0.90NBST-0.10BNS *** results show that the 0.90NBST-0.10BNS ceramic with outstanding comprehensive performances is a promising energy storage ceramic candidate for capacitors in high power systems.

关键词： Na_(0.5)Bi_(0.5)TiO_(3) Ferroelectric properties Energy density Temperature stability Power density

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