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Predicting the friction angle of clays using a multi-layer perceptron neural network enhanced by yeo-johnson transformation and coral reefs optimization

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journal of Rock Mechanics and Geotechnical Engineering 2024年第10期16卷 3982-4003页

作者： Libing Yang Trung Nguyen-Thoi Trung-tin Tran College of Civil Engineering and Architecture Hunan Institute of Science and TechnologyYueyang414006China Laboratory for Applied and Industrial mathematics Institute for Computational Science and Artificial IntelligenceVan Lang UniversityHo Chi Minh CityViet Nam Faculty of Mechanical-Electrical and Computer Engineering School of TechnologyVan Lang UniversityHo Chi Minh CityViet Nam Department of Information Technology Greenwich VietnamFPT UniversityDa Nang550000Viet Nam

The accurate prediction of the friction angle of clays is crucial for assessing slope stability in engineering *** study addresses the importance of estimating the friction angle and presents the development of four soft computing models:Yj-FPA-MLPnet,Yj-CRO-MLPnet,Yj-ACOC-MLPnet,and *** of all,the Yeo-johnson(Yj)transformation technique was used to stabilize the variance of data and make it more suitable for parametric statistical models that assume normality and equal *** technique is expected to improve the accuracy of friction angle prediction *** friction angle prediction models then utilized multi-layer perceptron neural networks(MLPnet)and metaheuristic optimization algorithms to further enhance performance,including flower pollination algorithm(FPA),coral reefs optimization(CRO),ant colony optimization continuous(ACOC),and cuckoo search algorithm(CSA).The prediction models without the Yj technique,***-MLPnet,CRO-MLPnet,ACOC-MLPnet,and CSA-MLPnet,were then compared to those with the Yj technique,***-FPA-MLPnet,Yj-CRO-MLPnet,Yj-ACOC-MLPnet,and *** these,the Yj-CRO-MLPnet model demonstrated superior reliability,achieving an accuracy of up to 83%in predicting the friction angle of clay in practical engineering *** improvement is significant,as it represents an increase from 1.3%to approximately 20%compared to the models that did not utilize the Yj transformation technique.

关键词： Natural hazards Slope stability Friction angle Clay Soft computing models Geotechnical engineering

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基于数据挖掘模型的智能插秧机作业实践探究

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农机化研究 2025年第2期47卷 190-194页

作者：马东梅厦门大学福建厦门361005 新疆天山职业技术大学乌鲁木齐830017

以进一步优化插秧机的整机作业效率为研究目标,选取插秧机智能控制系统为研究对象,基于数据挖掘模型及算法理念展开实践应用探究。结合插秧机的作业特征及网控系统结构原理,从降低网络信号传输延迟及提升抗干扰能力角度搭建数据挖掘算... 详细信息

以进一步优化插秧机的整机作业效率为研究目标,选取插秧机智能控制系统为研究对象,基于数据挖掘模型及算法理念展开实践应用探究。结合插秧机的作业特征及网控系统结构原理,从降低网络信号传输延迟及提升抗干扰能力角度搭建数据挖掘算法优化模型,并进行实际的插秧状态算法路径设计及控制指令下发,确保各个环节衔接准确。插秧作业结果表明:基于数据挖掘模型的插秧机智能化作业水平得到显著提升,挖掘算法精度与系统控制准确率分别可相对提升7.90%和5.75%,整机插植均匀度可达90.72%,对于插秧机的智能化开发与优化具有促进作用。

关键词：插秧机数据挖掘网控系统插植均匀度智能化开发

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Performance evaluation of a two-way relay network with energy harvesting^and hardware noises

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Digital Communications and Networks 2021年第1期7卷 45-54页

作者： Nguyen Tien Tung Pham Minh Nam Phu Tran tin Faculty of Electronics Technology Industrial University of Ho Chi Minh CityHo Chi Minh CityVietnam Wireless Communcations Research Group Faculy of Electrical and Electronics EngineeringTon Duc Thang UniversityHo Chi Minh CityVietnam

In this paper,we propose a Two-Way Cognitive Relay Network(TWCRN)where the secondary users operate on an underlay mode to access the licensed *** the proposed protocols,two secondary sources transmit their data to a relay in the first time slot,and then the relay would forward the received information to both sources in the remaining ***,the relay is self-powered by harvesting energy from ambient Radio Frequency(RF)signals,using the Time Switching(TS)and the Power Switching(PS)*** paper concentrates on eval-uating the performance of the secondary networks under the impact of hardware impairments and co-channel interference from the primary *** particular,based on the secondary transmitters'constraint power,we derive the closed-form expressions of the outage probability and the throughput over Rayleigh fading channels in two cases:TS and *** also investigate the energy efficiency issue and the locally optimal position of the relay to maximize the system throughput,which provides much information to install the relay ***,our derivations are verified by Monte Carlo simulation.

关键词： Energy harvesting Two-way relay Energy efficiency Hardware impairments Cognitive network

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创意写作的概念、原理及建制化发展——创意本体论创意写作学的基本主张及其建制实践

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当代文坛 2025年第1期 110-117页

作者：葛红兵马兵上海大学中国创意写作研究院

创意写作是一种创造性精神活动,以文字表达为实现形式,它遵循普遍的创意和表达规律,通过文化创意产业和事业来实现社会价值,助力“文化强国”和“创意国家”建设,依此而形成三大原理和创意生成叙事论、创意生成抒情论。中文创意写作学... 详细信息

创意写作是一种创造性精神活动,以文字表达为实现形式,它遵循普遍的创意和表达规律,通过文化创意产业和事业来实现社会价值,助力“文化强国”和“创意国家”建设,依此而形成三大原理和创意生成叙事论、创意生成抒情论。中文创意写作学的发展进入建制化时期,需要在基本概念和三大原理指引下,理论联系实际,平衡传承与创新、改革与接续的关系,自觉地承担中文学科改革者、探索者的角色,从培养目标、培养内容、培养方法等各个方面,改革中文学科旧制,走新建制主义之路。中文创意写作学科的工作者需要与种种错误的见解和窄化的庸见作斗争,突破传统中国汉语言文学学科的陈腐陋见。

关键词：创意写作叙事叙事生成-转换语法生成叙事转换叙事

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Spatial context in the calculation of gas emissions for underground coal mines

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International journal of Mining Science and Technology 2017年第5期27卷 787-794页

作者： Patrick booth Heidi Brown jan Nemcik Ren ting School of Civil Mining and Environmental EngineeringSchool of Earth and Environmental SciencesUniversity of WollongongWollongong 2500Australia

The prediction of gas emissions arising from underground coal mining has been the subject of extensive research for several decades, however calculation techniques remain empirically based and are hence limited to the origin of calculation in both application and resolution. Quantification and management of risk associated with sudden gas release during mining(outbursts) and accumulation of noxious or combustible gases within the mining environment is reliant on such predictions, and unexplained variation correctly requires conservative management practices in response to risk. Over 2500 gas core samples from two southern Sydney basin mines producing metallurgical coal from the Bulli seam have been analysed in various geospatial context including relationships to hydrological features and geological structures. The results suggest variability and limitations associated with the present traditional approaches to gas emission prediction and design of gas management practices may be addressed using predictions derived from improved spatial datasets, and analysis techniques incorporating fundamental physical and energy related principles.

关键词： Gas emission prediction Spatial analysis Underground coal mining Risk management Greenhouse gas Climate

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深度学习赋能波束管理:现状、挑战与机遇

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中山大学学报（自然科学版）（中英文） 2025年第1期64卷 40-50页

作者：王昭诚马可清华大学电子工程系北京100084

随着载波频率的不断提高和大规模天线阵列的广泛部署,基于模拟移相器的波束赋形成为下一代无线通信的标志性技术之一。此时,波束管理被用于获取和维护基站和用户端具有最大接收功率的最优波束对,以保障可靠的无线通信服务。传统波束管... 详细信息

随着载波频率的不断提高和大规模天线阵列的广泛部署,基于模拟移相器的波束赋形成为下一代无线通信的标志性技术之一。此时,波束管理被用于获取和维护基站和用户端具有最大接收功率的最优波束对,以保障可靠的无线通信服务。传统波束管理方法往往依赖于海量搜索。同时,传统数学模型无法全面的、准确刻画非线性的波束的内在关联和高维无线环境特征,因而难以取得令人满意的波束增益性能。近年来,得益于深度学习强大的自适应拟合能力,深度学习赋能波束管理得到了国内外广泛关注。本文总结了深度学习赋能波束管理的研究进展,并展望了未来的研究方向。首先,阐述了深度学习应用于波束管理的典型场景和潜在优势;随后,从空/时/频域切入,讨论当前深度学习赋能波束管理的主要研究路线和代表性工作;最后,面向更大规模的无线网络、更多元的波束管理功能和更鲁棒的深度学习模型,阐述未来的研究挑战与机遇。

关键词：深度学习波束管理空域时域频域

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EXPERIMENTAL RESEARCH OF CYLINDER TO BED HEAT TRANSFER IN AGITATED FLUIDIZED BEDS

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journal of Hydrodynamics 2000年第4期12卷 36-40页

作者： ma, j.H. Dep. of Air-condition Eng. Shandong Inst. of Archit. and Eng. Jinan 250014 China

Cylinder-to-bed heat transfer in agitated fluidized beds was studied experimentally. In the experiments, the aluminum particles were used as bed material, the diameter of those ranged from 0.5 mm to 2 mm. The effects of gas velocity, particles size, and agitator rotary speed on heat transfer were studied. From the experimental results, we have come to the following conclusion: (1) there are optimal ranges for airflow velocity and rotary speed to get optimal heat transfer coefficient; (2) the cylinder-to-bed heat transfer is greatly affected by gas velocity, rotary speed and particles sizes, and the effect of rotary speed on heat transfer is similar to that of gas velocity; (3) higher heat transfer coefficient is obtained with smaller particles.

关键词： Fluidized beds Heat transfer mass transfer Two phase flow

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Tensile Creep Behaviour of Silicon Carbide Particulate Reinforced Aluminium Composite

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journal of materials Science & Technology 1998年第1期14卷 33-36页

作者： ma, ZY Bi, j Lu, YX Chinese Acad Sci Inst Met Res Shenyang 110015 Peoples R China

Tensile creep tests were carried out on 15SiC (***) particulate reinforced commercial pure aluminum (15%SiCp/Al) composite at 573 and 623 K. The steady state creep stage exists at the applied stresses under the condition of tension. The 15%SiCp/Al composite exhibits an apparent stress exponent of about 13 and an apparent activation energy of 253 kj/mol. The creep data were normalized using a substructure invariant model with a stress exponent of 8 together with a threshold stress.

关键词： Metallic matrix composites

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Microwave technology enabled transdermal nanocarrier and drug delivery

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Asian journal of Pharmaceutical Sciences 2016年第1期11卷 43-44页

作者： tin Wui Wong Non-Destructive Biomedical and Pharmaceutical Research Centre iPROMISE Universiti Teknologi MARA Particle Design Research Group Faculty of Pharmacy Universiti Teknologi MARA

Transdermal drug delivery is impeded by the natural barrier of epidermis known as stratum *** limits the route to transport of drugs with a log octanol–water partition coefficient of 1 to 3,molecular weight of less than 500 Da and melting point of less than 200°*** has received a widespread investigation as the nanocarriers are able to fluidize the stratum corneum as a function of size,shape,surface charges,and hydrophilicity–hydrophobicity balance,while delivering drugs across the skin barrier.

关键词： Microwave technology Transdermal Nanocarrier Drug delivery

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A hybrid multi-degree-of-freedom vibration isolation platform for spacecrafts by the linear active disturbance rejection control

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Applied mathematics and Mechanics(English Edition) 2020年第5期41卷 805-818页

作者： Weichao CHI S.j.ma j.Q.SUN College of Science Northeastern UniversityShenyang 100819China Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern UniversityShenyang 100819China Department of Mechanical Engineering School of EngineeringUniversity of CaliforniaMercedCA 95343U.S.A.

The hybrid vibration isolation, which takes advantages of both the passive and active approaches, has been an important solution for space missions. The objective of this paper is to design a vibration isolation platform for payloads on spacecrafts with the robust, wide bandwidth, and multi-degree-of-freedom(MDOF). The proposed solution is based on a parallel mechanism with six voice-coil motors(VCMs) as the actuators. The linear active disturbance resistance control(LADRC) algorithm is used for the active control. Numerical simulation results show that the vibration isolation platform performs effectively over a wide bandwidth, and the resonance introduced by the passive isolation is eliminated. The system robustness to the uncertainties of the structure is also verified by simulation.

关键词： hybrid vibration isolation Stewart platform linear active disturbance rejection control(LADRC) stability robustness

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