Anomaly detection stands as a crucial facet within the domain of data quality assurance. Notably, significant strides have been made within the realm of existing anomaly detection algorithms, encompassing notable tech...
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This study examines the stabilization issue of extended chained nonholonomic systems(ECNSs)with external *** the existing approaches,we transform the considered system into a fully actuated system(FAS)model,simplifyin...
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This study examines the stabilization issue of extended chained nonholonomic systems(ECNSs)with external *** the existing approaches,we transform the considered system into a fully actuated system(FAS)model,simplifying the stabilizing controller *** implement a separate controller design and propose exponential stabilization controller and finite-time stabilization controller under finite-time disturbance observer(FTDO)for the two system *** addition,we discuss the specifics of global stabilization control *** approach demonstrates that two system states exponentially or asymptotically converge to zero under the provided switching stabilization control strategy,while all other system states converge to zero within a finite time.
Cancer progression involves the gradual loss of a differentiated phenotype and the acquisition of progenitor and stem cell-like features,which are potential culprits of immunotherapy *** the state-of-the-art predictiv...
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Cancer progression involves the gradual loss of a differentiated phenotype and the acquisition of progenitor and stem cell-like features,which are potential culprits of immunotherapy *** the state-of-the-art predictive computational methods have facilitated the prediction of cancer stemness,there remains a lack of efficient resources to accommodate various usage ***,we present the Cancer Stemness Online,an integrated resource for efficiently scoring cancer stemness potential at both bulk and single-cell *** resource integrates eight robust predictive algorithms as well as 27 signature gene sets associated with cancer stemness for predicting stemness *** analyses were performed from five distinct aspects:identifying the signature genes of cancer stemness;exploring the associations with cancer hallmarks and cellular states;exploring the associations with immune response and the communications with immune cells;investigating the contributions to patient survival;and performing a robustness analysis of cancer stemness among different ***,the pre-calculated cancer stemness atlas for more than 40 cancer types can be accessed by *** the tables and diverse visualizations of the analytical results are available for ***,Cancer Stemness Online is a powerful resource for scoring cancer stemness and expanding downstream functional interpretation,including immune response and cancer *** Stemness Online is freely accessible at http://***/CancerStemnessOnline.
Various characteristic structures in typical magnesium alloys,including dislocation cells,substructures and twins,have an important influence on the dynamic recrystallization behavior,and the DRX(dynamic recrystalliza...
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Various characteristic structures in typical magnesium alloys,including dislocation cells,substructures and twins,have an important influence on the dynamic recrystallization behavior,and the DRX(dynamic recrystallization)behavior is closely related to the grain refinement and texture weakening of the hot deformed ***,this study reveals the influence of the above characteristic structures on the dynamic recrystallization behavior of magnesium alloys,which have great significance for regulating the high-performance hot deformed microstructure of magnesium alloys and optimizing the macro mechanical *** this study,continuous variable channel direct extrusion(CVCDE)magnesium alloy was prepared by CVCDE,and its macro mechanical properties including hardness and uniaxial tension were *** thermoplastic deformation behavior and texture evolution of magnesium alloy with characteristic structure were analyzed by electron back-scattering diffraction *** is found that the dislocation recombination was realized by deformation mechanism(slip,climb and cross slip),the formation of grain substructure in coarse grains and the induction of recrystallization by twins promote the recrystallization behavior in hot deformed structures more adequate,which effectively improves the degree of microstructure refinement and deformation uniformity.
An in-depth understanding of the crystal orientation evolution during hot rolling of TiB whisker(TiBw)/TA15 composites and the anisotropy of the as-rolled plates can help fully utilize the material *** this paper,the ...
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An in-depth understanding of the crystal orientation evolution during hot rolling of TiB whisker(TiBw)/TA15 composites and the anisotropy of the as-rolled plates can help fully utilize the material *** this paper,the crystal plasticity finite element models of high-temperature(HT)β-phase and room-temperature(RT)α-phase were constructed from electron backscattering diffraction *** on this,the orientation evolution during hot rolling in the single-phase region and the effects of the matrix texture on the mechanical properties of the as-rolled plates were *** effect of TiBw on the anisotropy was studied by the composites finite element *** showed that theα-fiber texture of theβ-phase was formed during HT *** texture was converted to the T-texture of theα-phase at RT during cooling according to the Burgers orientation *** TiBw had little effect on the matrix texture *** TiBw and matrix texture caused the matrix to have higher strength along the rolling direction and the transverse direction,*** matrix texture dominated the difference in mechanical properties because its effect exceeded that of *** effect of the matrix on the mechanical properties was caused by the Schmid factors(SFs)and the critical resolved shear stress(CRSS)of the slip system *** slip mode was influenced by SFs determined by the angular rela-tionship between the crystal orientation and the loading *** CRSS of the activated slip system determined the yield strength.
The evolution of the microstructure and mechanical properties of alloy system with nominally composition Mg-5Li-1Zn-0.5Ag-0.5Zr-xGd(x=0,1.2,2.4,3.6,4.8,6)is evaluated based on computational phase diagram and correspon...
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The evolution of the microstructure and mechanical properties of alloy system with nominally composition Mg-5Li-1Zn-0.5Ag-0.5Zr-xGd(x=0,1.2,2.4,3.6,4.8,6)is evaluated based on computational phase diagram and corresponding experimental *** results show that grains are significantly refined with the increase of Gd *** main phases of as-cast alloys areα-Mg,β-Li,AgLi_(2)Mg,and Mg_(3)*** the increase of Gd content,the amounts of Mg_(3)Gd phase andβ-Li phase have been *** the Gd content exceeds 3.6 wt%,Mg_(3)Gd phase precipitates in a form of the network at the grain *** precipitation ofβ-Li can be attributed to the competitive dissolution of Zn,Gd,and Li in ***,γ″is formed after the addition of Gd,which grows and transforms intoγ′with the increase of Gd *** solidification process,stacking faults are formed by solid transformation of partialα-Mg and Mg_(3)***,with the synergistic effect of Mg_(3)Gd,β-Li,andγ″(orγ′),as the Gd content increasing,the tensile strength of the alloy first increases,then decreases,and the elongation *** the content of Gd is 4.8 wt%,the ultimate tensile strength and yield strength reach the maximum values of 227 MPa and 139 MPa,and the elongation is 18.1%,respectively.
The perception in most existing vision-based reinforcement learning(RL) models for robotic manipulation relies heavily on static third-person or hand-mounted first-person cameras. In scenarios with occlusions and limi...
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The perception in most existing vision-based reinforcement learning(RL) models for robotic manipulation relies heavily on static third-person or hand-mounted first-person cameras. In scenarios with occlusions and limited maneuvering space, these carefully positioned cameras often struggle to provide effective visual observations during manipulation. Taking inspiration from human capabilities, we introduce a novel RL-based dual-arm active visual-guided manipulation model(DAVMM), which simultaneously infers “eye” actions and “hand” actions for two separate robotic arms(referred to as the vision-arm and the worker-arm) based on current observations, empowering the robot with the ability to actively perceive and interact with its environment. To handle the extensive redundant observation-action space, we propose a decouplable target-centric reward paradigm to offer stable guidance for the training process. For making fine-grained manipulation action decisions, alongside a global scene image encoder, we utilize an independent encoder to extract local target texture features,enabling the simultaneous acquisition of both global and detailed local information. Additionally, we employ residual-RL and curriculum learning techniques to further enhance our model's sample efficiency and training stability. We conducted comparative experiments and analyses of DAVMM against a set of strong baselines on three occluded and narrow-space manipulation tasks. DAVMM notably improves the success rates across all manipulation tasks and showcases rapid learning capabilities.
In the wake of rapid advancements in artificial intelligence(AI), we stand on the brink of a transformative leap in data systems. The imminent fusion of AI and DB(AI×DB) promises a new generation of data systems,...
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In the wake of rapid advancements in artificial intelligence(AI), we stand on the brink of a transformative leap in data systems. The imminent fusion of AI and DB(AI×DB) promises a new generation of data systems, which will relieve the burden on end-users across all industry sectors by featuring AI-enhanced functionalities, such as personalized and automated in-database AI-powered analytics, and selfdriving capabilities for improved system performance. In this paper, we explore the evolution of data systems with a focus on deepening the fusion of AI and DB. We present NeurDB, an AI-powered autonomous data system designed to fully embrace AI design in each major system component and provide in-database AI-powered analytics. We outline the conceptual and architectural overview of NeurDB, discuss its design choices and key components, and report its current development and future plan.
Background: The trachea is an important part of the respiratory system, which is tubular. The upper part of the trachea connects to the throat, and its lower left and right branches lead to the lungs. The foreign body...
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With the rapid development of blockchain technology, P2P networks are facing increasing security threats, among which Eclipse attacks, as a type of network isolation attack, have seriously affected the normal operatio...
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