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Multi-models associated with process information-driven process autonomous digital twin for multi-variety production of intelligent machines

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Science china(Technological Sciences) 2024年第12期67卷 3825-3842页

作者： ZHANG Lu WANG Xiao HE SongPing MAO XinYong LI Bin LIU HongQi State Engineering Research Centerof Digital Manufacturing and Equipmen Huazhong University of Science and Technology Wuhan 430074China Wuhan Heay Duty Machine Tool Group Corporation Wuhan 430205China National NC System Engineering Research Center Huazhong University of Science and TechnologyWuhan 430074China

The intelligent development of machines,as one of the essential research components of smart manufacturing,is urgently needed to improve the intelligent production of product manufacturing processes within product *** uncertainty of the process requirements within a product family and the time-varying nature of the processing performance of machines pose significant challenges for intelligent *** twins(DTs)have proven to be very effective architectures for intelligent manufacturing;DTs support dynamic modeling capabilities in time and space and can provide effective technical support for manufacturing intelligence under multi-variety ***,a process autonomous digital twin(PADT)framework driven by characterization,prediction,and evaluation-based multi-models(CPEM)associated with process information is constructed to realize intelligent ***,the multidimensional information contained in the machining process is analyzed to accurately locate the features of machining precision,and a machine performance characterization model is ***,a machine capacity prediction model based on time-scale information fusion is established to predict the processing capacities of machines under different production ***,a product distribution evaluation model based on the 3σ rule is established,which provides an effective evaluation index for the optimization of processing *** application of CPEM-driven PADT in a commutator machining machine provides predictive manufacturing intelligence within a product family.

关键词： process autonomous digital twin precision performance characterization performance prediction model distribution evaluation model manufacturing intelligence

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Intact spermatogenesis in an azoospermic patient with AZFa (sY84 and sY86) microdeletion and a homozygous TG12-5T variant in CFTR

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BASIC AND CLINICAL ANDROLOGY 2025年第1期35卷 1-8页

作者： Sun, Yifan Zhong, Beifen Meng, Zizhou Zhang, Yuxiang Li, Zheng Yao, Chencheng Shanghai Jiao Tong Univ Sch Med Dept Androl Shanghai Key Lab Reprod MedCtr Mens HlthUrol Med Shanghai 200080 Peoples R China Nanjing Med Univ State Key Lab Reprod Med & Offspring Hlth Sch Clin Med Affiliated Taizhou Peoples Hosp Taizhou 225300 Peoples R China

BackgroundAzoospermia, the most severe form of male infertility, is categorized into two types: non-obstructive azoospermia (NOA) and obstructive azoospermia (OA), which exhibit significant genetic heterogeneity. Azoospermia factor (AZF) deletion is a common cause of NOA, whereas congenital bilateral absence of the vas deferens (CBAVD), a severe subtype of OA, is frequently linked to cystic fibrosis transmembrane conductance regulator (CFTR) gene variants. This case report is the first to document the coexistence of a partial AZFa microdeletion and a homozygous CFTR variant in a CBAVD-affected azoospermic patient with intact *** presentationA 32-year-old man presented with primary infertility and azoospermia. Clinical evaluation revealed CBAVD (normal hormone levels, low semen volume, pH 6.0, and absence of the vas deferens). Genetic analysis accidentally revealed a 384.9 kb AZFa deletion (sY84 and sY86, but not sY1064, 1182) that removed USP9Y but retained DDX3Y in the proband, his fertile brother, and his father. A homozygous CFTR variant (TG12-5T) was also detected in the proband and his brother and was inherited from heterozygous parental carriers. Microdissection testicular sperm extraction (micro-TESE) revealed intact spermatogenesis, confirmed by histology and immunofluorescence, indicating normal germ cell *** case expands the intricate genetic spectrum of azoospermia by illustrating the critical role of DDX3Y in the AZFa region in spermatogenesis and the variable penetrance of CFTR variant (TG12-5T) in CBAVD. These insights may refine diagnostic strategies and underscore the necessity for tailored fertility management in individuals with multifactorial genetic anomalies. ContexteL'azoospermie, la forme la plus grave d'infertilit & eacute;masculine, est class & eacute;e en deux types : l'azoospermie non obstructive (NOA) et l'azoospermie obstructive (OA), qui pr & eacute;sentent une h & eacute;t & eacute;rog & eacute;n

关键词： Azoospermia AZFa microdeletion Cystic fibrosis transmembrane conductance regulator gene Spermatogenesis Congenital bilateral absence of the vas deferens Azoospermie Microd & eacute l & eacute tion AZFa Mucoviscidose G & egrave ne r & eacute gulateur de la Conductance transmembranaire Spermatogen & egrave se Absence bilat & eacute rale cong & eacute nitale du Canal D & eacute f & eacute rent

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Maize promoted the growth and volatile oil accumulation of Atractylodes lancea through rhizosphere VOCs

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PLANT AND SOIL 2025年第1-2期506卷 109-123页

作者： Peng, Zheng Cao, Meiyu Yan, Binbin Wang, Sheng Kang, Chuangzhi Wang, Hongyang Wan, Xiufu Hao, Qingxiu Xiang, Zengxu Zhang, Zihua Xue, Wenjun Feng, Li Zhang, Yan Wu, Hongli Guo, Lanping China Acad Chinese Med Sci Natl Resource Ctr Chinese Mat Med State Key Lab Qual Ensurance & Sustainable Use Dao Beijing 100700 Peoples R China Dexing Res & Training Ctr Chinese Med Sci Dexing 334220 Peoples R China Nanjing Agr Univ Coll Hort Nanjing 210095 Peoples R China Dexing Tradit Chinese Med Ind Dev Serv Ctr Dexing 334220 Peoples R China Nanjing WaMing Agr Technol Co Ltd Nanjing 210095 Peoples R China China Acad Chinese Med Sci Inst Basic Res Clin Med Beijing 100700 Peoples R China

Purpose Different species within a multi-ecosystem can enhance their growth, nutrient absorption, and accumulation of secondary metabolites. Atractylodes lancea (A. lancea) and maize intercropping enhance A. lancea yield and secondary metabolite *** study have, however, exploration the rhizosphere interaction of A. lancea and maize *** In this study, we conducted pot experiments, A. lancea monoculture (A), A. lancea and maize intercropping without a root barrier (AI), with an impermeable plastic root barrier (AP), or with a permeable nylon root barrier (AN). Soil samples were collection from A. lancea roots for volatile organic compounds (VOCs) detection to explore the relationship between VOCs and intercropping between A. lancea and *** Intercropping resulting in increased rhizome yield and atractylon content in A. lancea. This can be attributed to changes in the composition of VOCs in the A. lancea roots. The rhizosphere of A. lancea altered VOCs composition after intercropping with maizie, and these altered VOCs were significantly positive correlations with atractylon content and A. lancea biomass. Notably, 2,6,10-trimethyltetradecane and ethyl isocholate were identified as shared VOCs in the rhizosphere of A. lancea and maize. These VOCs likely play a role in the increased biomass and atractylon content of A. lancea, serving as potential communication substances between A. lancea and *** Our study provides evidence that identified from rhizosphere soil 2, 6, 10-trimethyltetradecane and ethyl isocholate is potential compounds that mediated rhizosphere interaction in A. lancea-maize intercropping. Our finding will help to further understanding the role of VOCs in ecosystems, and provide implications for studying the interaction in plant rhizosphere.

关键词： Atractylodes lancea (Thunb.) DC. Maize Root exudates Volatile organic compounds Metabolome

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Soil erosion-induced decline in aggregate stability and soil organic carbon reduces aggregate-associated microbial diversity and multifunctionality of agricultural slope in the Mollisol region

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LAND DEGRADATION & development 2024年第11期35卷 3714-3726页

作者： Yang, Qingsong Peng, Jue Ni, Shimin Zhang, Chenyang Wang, Junguang Cai, Chongfa Huazhong Agr Univ Coll Resources & Environm Key Lab Arable Land Conservat Middle & Lower Reach Minist Agr Wuhan 430070 Hubei Peoples R China Henan Univ Minist Educ Coll Geog & Environm Sci Key Lab Geospatial Technol Middle & Lower Yellow R Kaifeng Henan Peoples R China

Soil erosion has become a serious ecological problem hindering the agricultural and economic development in Northeast china. Soil aggregates are basic units that regulate soil fertility and microbial activity. However, there have been few reports on the role of soil erosion in regulating the microbial diversity, multiple ecosystem services, and functions (multifunctionality) of soil aggregates. In this study, we investigated the effects of soil erosion on microbial diversity and the activities of various extracellular enzymes associated with soil aggregates by using Mollisol soil in Northeastern china at different positions of a slope, and how soil erosion affects soil multifunctionality indexes obtained by normalized calculation of soil enzyme activities. The results showed that soil erosion could reduce the physicochemical properties, soil enzyme activity, and microbial diversity of the aggregates, resulting in accumulation of aggregate nutrients and increase in microbial diversity and enzyme activity in the sedimentation area. Compared with smaller soil aggregates, larger soil aggregates had higher nutrient content, enzyme activity, and microbial diversity. However, with the intensification of soil erosion, the differences in microbial diversity and soil enzyme activities among different sizes of aggregates were reduced. Soil erosion also significantly reduced soil multifunctionality (p < 0.001). The multifunctionality of 2000-250 mu m, 250-53 mu m, and <53 mu m aggregates respectively declined from 0.52, 0.20, and 0.08 (no erosion sites) to -0.17, -0.66, and -0.77 (heavy erosion sites). Additionally, microbial diversity was found to have a linear positive correlation with soil multifunctionality (R2 = 0.23, p < 0.01). Structural equation modeling and random forest analysis revealed that soil organic carbon and aggregate water stability are main predictors of soil multifunctionality. Furthermore, soil physicochemical properties had a greater influence on soil mul

关键词： microbial diversity soil aggregate soil enzyme soil erosion soil multifunctionality

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Multi-scale modelling of the microstructure evolution during friction stir welding of 2195 Al-Li alloy

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JOURNAL OF MATERIALS research AND TECHNOLOGY-JMR&T 2024年 28卷 1318-1329页

作者： Lyu, Xiaohui Tian, Chunyan Shi, Lei Wu, Chuansong Chen, Ji Yu, Pengfei Shandong Univ Inst Mat Joining MOE Key Lab Liquid Solid Struct Evolut & Mat Proc Jinan 250061 Peoples R China Univ Dublin Trinity Coll Dublin Dept Mech Mfg & Biomed Engn Dublin Ireland

Al-Li alloy has a wide range of application prospects in aerospace and rail transportation fields. Friction stir welding (FSW) is suitable for joining of Al-Li alloy. The microstructure evolution in FSW of Al-Li alloy determines the final joint properties. However, it is difficult to directly observe the microstructure evolution in FSW of Al-Li alloy only by experimental methods. Therefore, a Monte Carlo model in cooperation with a thermomechanical finite element model was proposed to study the microstructure evolution in FSW of 2195 Al-Li alloy. The validated thermomechanical finite element model was first used to calculate the temperature field, strain rate and strain evolution during the FSW process. Then, the achieved thermomechanical history was used in the Monte Carlo model to predict the transient microstructure evolution and the final morphology of the grain structure. It is found that the plastic materials on the advancing side experience a higher strain compared with that on the retreating side with the same distance from the joint line. The plastic material in the middle of the weld nugget zone (WNZ) experiences a relatively high temperature with more severe plastic deformation. Therefore, fully dynamic recrystallization takes place for the material at this region as it flows across the tool during FSW, which results in a fine recrystallization grain in the middle of WNZ. However, the material on the advancing side at 2 mm away from the joint line experiences a lower strain rate, which results in partial recrystallization with some relatively large grains of the base materials. The simulated average grain size and grain morphology were in good agreement with the measured results by EBSD method.

关键词： Monte Carlo simulation Grain structure evolution Dynamic recrystallization Aluminium-lithium alloy Friction stir welding Weld nugget zone

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Pixel-wise anomaly detection on road by encoder-decoder semantic segmentation framework with driving vigilance

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COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING 2025年第0期 2190-2208页

作者： Liu, Yipeng Wu, Jianqing Song, Xiuguang Shandong Univ Sch Qilu Transportat Jinan 250000 Peoples R China

Semantic segmentation struggles with detecting undefined road obstacles, critical for autonomous driving in urban environments. This study addresses the need for accurate unknown obstacle detection, inspired by drivers' instinctual vigilance toward unexpected objects. It explores the impact of unexpected object position patterns on anomaly detection using human fixation scan-paths and gaze density heat maps. Data augmentation based on these patterns enhances the outlier dataset for anomaly detection networks. The proposed driving vigilance enhancement framework (DVEF) improves classification accuracy with multi-scale detailed features and a vigilance enhancement model, generating vigilance score maps to prioritize unknown regions. An improved energy model joint loss function expands vigilance scores, enhancing anomaly detection accuracy. Compared with recent methods on Fishyscapes (FS) LostAndFound, FS Static, and average datasets, average precision improvements of 2.16%, 2.22%, and 2.89% are achieved on these datasets, respectively. In addition, the false positive rate at a true positive rate of 95% are decreased to 5.79%, 5.62%, and 17.89%, respectively. It is indicated that the performance of the encoder-decoder semantic segmentation network is improved by DVEF, with enhanced consistency and robustness.

关键词： Semantic Segmentation

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Precise regulation of the phase transformation for pyrolusite during the reduction roasting process

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 81-90页

作者： Ruofeng Wang Peng Gao Shuai Yuan Yanjun Li Yingzhi Liu Cheng Huang School of Resources and Civil Engineering Northeastern UniversityShenyang 110819China National-Local Joint Engineering Research Center of High-efficient Exploitation Technology for Refractory Iron Ore Resources Shenyang 110819China

The mechanism involved in the phase transformation process of pyrolusite (MnO_(2)) during roasting in a reducing atmosphere was systematically elucidated in this study,with the aim of effectively using low-grade complex manganese ore *** to single-factor experiment results,the roasted product with a divalent manganese (Mn^(2+)) distribution rate of 95.30% was obtained at a roasting time of 25 min,a roasting temperature of 700℃,a CO concentration of 20at%,and a total gas volume of 500 mL·min^(-1),in which the manganese was mainly in the form of manganosite (MnO).Scanning electron microscopy and Brunauer–Emmett–Teller theory demonstrated the microstructural evolution of the roasted product and the gradual reduction in the pyrolusite ore from the surface to the core Thermodynamic calculations,X-ray photoelectron spectroscopy,and X-ray diffractometry analyses determined that the phase transformation of pyrolusite followed the order of MnO_(2)→Mn_(2)O_(3)→Mn_(3)O_(4)→MnO phase by phase,and the reduction of manganese oxides in each valence state proceeded simultaneously.

关键词： pyrolusite phase transformation reduction roasting microstructural evolution reaction mechanism

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Comparative Study of the Mechanical Characteristics of the Song Dynasty Dou-Gong from Multiple Angles

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INTERnational JOURNAL OF ARCHITECTURAL HERITAGE 2025年

作者： Zhang, Chengya Meng, Xianjie Wang, Xiaomin Li, Weijun Taiyuan Univ Technol Coll Civil Engn 79 West St Taiyuan 030024 Peoples R China Shanxi Construct Investment Grp Co Ltd Postdoctoral Res Stn Taiyuan Peoples R China Taiyuan Univ Technol Coll Civil Engn Taiyuan Peoples R China Taiyuan Univ Technol Coll Mat Engn Taiyuan Peoples R China

This study investigates the typical Dou-gong of the Song Dynasty in china. Four tests were conducted: horizontal reciprocating loading, vertical monotonic loading, horizontal reciprocating loading test of the Dou-gong beam frame, and damage investigation of the Dou-gong. The study focused on the mechanical characteristics of the Dou-gong components, including the damage, force-displacement curve, and energy use. The test and damage investigation showed that the weak parts of the Dou-gong were in the lower-story and exposed components. In the horizontal reciprocating test of the Dou-gong node and beam frame, the Dou-gong inclined, and the components slipped, pinching the hysteresis curve. The positive and negative loading forces in both tests were asymmetric. The Dou-gong hysteresis curve of the node loading exceeded that of the beam-frame loading. In the elastic stage, the Dou-gong stiffness under node loading was approximately four times that under beam-frame loading. The total energy consumption under node loading was approximately seven times that under beam-frame loading, and its equivalent viscous damping coefficient under node loading was about twice as high. A multiangle comparative study of the mechanical properties of the Song-style Dou-gong provides a basis for protecting ancient wooden buildings and comparing similar nodes or beam tests.

关键词： Ancient timber structure deformation characteristics Dou-gong energy consumption hysteresis characteristics

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Effect of layer thickness on the flexural property and microstructure of 3D-printed rhomboid polymer-reinforced cemented tailing composites

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International Journal of Minerals,Metallurgy and Materials 2023年第2期30卷 236-249页

作者： Ziyue Zhao Shuai Cao Erol Yilmaz State Key Laboratory of High-Efficient Mining and Safety of Metal Mines of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Department of Civil Engineering Geotechnical DivisionRecep Tayyip Erdoğan UniversityFenerRize TR53100Turkey

For mines with poor ore bodies and surrounding rocks,the general mining method does not allow the ore to be extracted from underground safely and *** these mines,the downward layered filling mining technique is undoubtedly the most suitable mining *** downward filling mining technique may eliminate the troubles relating to poor ore deposit conditions,such as production safety,ore loss rate,and depletion ***,in this technique,the safety of the artificial roof of the next stratum is of paramount *** tailings backfilling(CTB)that is not sufficiently cemented and causes collapses could threaten ore *** paper explores a diamond-shaped composite structure to mimic the stability of a glued false roof in an actual infill mine based on the recently emerged three-dimensional(3D)printing *** means such as three-point bending and digital image correlation(DIC)techniques were used to explore the flexural characteristics of 3D construction specimens and CTB combinations with different cement/tailings weight ratios at diverse layer *** results show that the 3D structure with a 14-mm ply height and CTB has strong flexural characteristics,with a maximum deflection value of 30.1 mm,while the 3D-printed rhomboid polymer(3D-PRP)structure with a 26-mm ply height is slightly worse in terms of flexural strength characteristics,but it has a higher maximum flexural strength of 2.83 MPa.A combination of 3D structure and CTB has more unique mechanical properties than CTB *** research work offers practical knowledge on the artificial roof performance of the downward layered filling mining technique and builds a scientific knowledge base regarding the successful application of CTB material in mines.

关键词： tailings cemented fills 3D printed rhomboidal polymer three-point bending test digital image correlation

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FedMP: A multi-pronged defense algorithm against Byzantine poisoning attacks in federated learning

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COMPUTER NETWORKS 2025年 257卷

作者： Zhao, Kai Wang, Lina Yu, Fangchao Zeng, Bo Pang, Zhi Wuhan Univ Sch Cyber Sci & Engn Key Lab Aerosp Informat Secur & Trusted Comp Minist Educ Wuhan 430072 Peoples R China

Federated learning (FL) is an increasingly popular privacy-preserving collaborative machine learning paradigm that enables clients to train a global model collaboratively without sharing their raw data. Despite its advantages, FL is vulnerable to untargeted Byzantine poisoning attacks in which malicious clients send incorrect model updates during training to disrupt the global model's performance or prevent it from converging. Existing defenses based on anomaly detection typically rely on additional auxiliary datasets and assume a known and fixed proportion of malicious clients. To overcome these shortcomings, we propose FedMP, a multi-pronged defense algorithm against untargeted Byzantine poisoning attacks. FedMP's primary idea is to detect anomalous variations in the magnitude and direction of model updates across communication rounds. In particular, FedMP first utilizes an adaptive scaling module to limit the impact of malicious updates with anomalous amplitudes. Then, FedMP identifies and filters malicious model updates with abnormal directions through dynamic clustering and partial filtering methods. Finally, FedMP extracts pure ingredients from the filtered updates as reputation scores for model aggregation to further reduce the influence of malicious updates. Comprehensive evaluations across three publicly accessible datasets demonstrate that FedMP significantly outperforms the existing Byzantine robust defenses under a high proportion of malicious clients (0.7 in our experiments) and high Non-IID degree (0.1 in our experiments) scenarios.

关键词： Federated learning Byzantine attacks Malicious clients Adaptive scaling Aggregation

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