Science China Technological Sciences

https://link.springer.com/journal/11431

List of Papers (Total 129)

Distributed online bandit tracking for Nash equilibrium under partial-decision information setting

This paper is concerned with a Nash equilibrium (NE) tracking issue in online games with bandit feedback, where cost functions vary with time and agents only have access to the values of these functions at two points during each round. A partial-decision information setting is considered, in which agents have only access to the decisions of their neighbors. The primary objective...

SoSpider: A bio-inspired multimodal untethered soft hexapod robot for planetary lava tube exploration

Soft robots have tremendous potential for applications in various fields, owing to their safety and flexibility embedded at the material level. Soft robots, especially bio-inspired soft legged robots, have become one of the most active fields of current research in robotics thanks to their superior mobility and ability to face complex terrains. However, it is arduous to establish...

Energy flow accounts for the adaptive property of functional synapses

In the presence of external stimuli and electromagnetic radiation (EMR), biological neurons can exhibit different firing patterns and switch to appropriate firing modes because of intrinsic self-adaption. Coupling to memristive synapses can discern the EMR effect, and memristive synapses connecting to neurons can be effectively regulated by external physical fields. From a...

Modeling and analysis for time-varying dynamics of thin-walled workpieces in mirror milling considering material removal

To reduce the vibration and deformation of large thin-walled workpieces during the milling process, mirror milling is widely used due to its point-to-point support and strong applicability. The influence of the support head on the workpiece’s dynamic characteristics is crucial in determining whether the mirror milling process is reliable and effective. Therefore, this study...

Residual index for measurement configuration optimization in robot kinematic calibration

To improve the efficiency and accuracy of kinematic calibration, the selection of measurement configurations is an important issue. In previous research, optimal measurement configurations mainly are selected by maximizing observability indices. However, the traditional observability indices only focus on the identification efficiency of the error parameters, while the purpose of...

Advanced methodologies for the cleaning of works of art

Cultural heritage assets constitute a fundamental socioeconomic resource, but the actual works of art need to be maintained, counteracting degradation processes, to transfer these benefits to future generations. In particular, the removal of soil, aged coatings, and vandalism/overpaints is one of the most needed interventions in art restoration. Traditional cleaning methodologies...

Interactive method research of dual mode information coordination integration for astronaut gesture and eye movement signals based on hybrid model

The lightweight human-robot interaction model with high real-time, high accuracy, and strong anti-interference capability can be better applied to future lunar surface exploration and construction work. Based on the feature information inputted from the monocular camera, the signal acquisition and processing fusion of the astronaut gesture and eye-movement modal interaction can...

PVDF/PLA electrospun fiber membrane impregnated with metal nanoparticles for emulsion separation, surface antimicrobial, and antifouling activities

Although many superwetting materials have been designed for the treatment of oil-containing wastewater, separation strategies for oil-in-water systems containing bacteria have rarely been reported. Herein, poly(vinylidene difluoride)- and poly(lactic acid)-blended fibrous membranes loaded with silver and copper oxide nanoparticles were successfully prepared by a two-step method...

NA-OR: A path optimization method for manipulators via node attraction and obstacle repulsion

This paper is concerned with the issue of path optimization for manipulators in multi-obstacle environments. Aimed at overcoming the deficiencies of the sampling-based path planning algorithm with high path curvature and low safety margin, a path optimization method, named NA-OR, is proposed for manipulators, where the NA (node attraction) and OR (obstacle repulsion) functions...

Plate-based cylinder metamaterial with negative Poisson’s ratio and outstanding mechanical performance

Plate-based cellular materials exhibit greater stiffness and strength than conventional cellular materials formed by struts. In this study, we designed and fabricated a plate-based auxetic cylinder metamaterial using high-resolution projection micro-stereolithography three-dimensional printing technique. Experiment and modeling results validated the auxetic behavior of the plate...

Mirror-assisted multi-view high-speed digital image correlation for dual-surface dynamic deformation measurement

Based on the recently proposed mirror-assisted multi-view digital image correlation (MV-DIC), we establish a cost-effective and easy-to-implement mirror-assisted multi-view high-speed digital image correlation (MVHS-DIC) method and explore its applications for dual-surface full-field dynamic deformation measurement. In contrast to the general requirement of four expensive high...

A local toolpath smoothing method for a five-axis hybrid machining robot

Smooth transitions between two adjacent five-axis toolpaths can reduce feedrate fluctuation, improving machining quality and efficiency. Hybrid robots’ flexibility to adjust the orientation is advantageous in five-axis machining, but their kinematic issues raise challenges for toolpath smoothing. This paper proposes a G3 continuous toolpath smoothing method for a hybrid robot. B...

Cross-project prediction for rock mass using shuffled TBM big dataset and knowledge-based machine learning methods

Extensive research has confirmed the successful prediction of rock mass quality in tunnel boring machine (TBM) construction using machine learning methods based on big data collected during the boring process. However, the developed model cannot be applied to a new project owing to the different mechanical and environmental features involved in different projects. This study...

Durable and stretchable nanocomposite ionogels with high thermoelectric property for low-grade heat harvesting

Stretchable ionic thermoelectric (i-TE) materials have attracted growing interest in converting low-grade thermal energy into electricity. However, substantial improvement on i-TE performance of quasi-solid ionogels remains a significant challenge. Here, a nanocomposite ionogel with skin-like stretchability, high i-TE performance, thermostability and durability is prepared by...