The article discusses the selection of propulsion systems for deep-space exploration, focusing on micropropulsion technology. Key findings include the analysis of various micropropulsion modules, including cold gas and chemical propulsion systems, as well as their applications in different missions such as lunar exploration and Tianqin...
Researchers develop a modular structure design method for a deployable space robot called Cubot to facilitate on-orbit missions. The system can perform tasks such as space debris removal and maintenance with reduced risk and increased efficiency.
A novel framework for building a low-cost, monocular visual-tactile sensor is presented for robotic manipulation tasks. The proposed design uses a marker-based approach to detect contact locations and estimates the location of contacts using ARUCO markers.
A researcher developed a system to determine the pose of cooperative spacecraft using ToF cameras and reflector markers. The system consists of three steps: reflector detection, matching, and pose calculation, and was tested in experiments with high accuracy.
Researchers developed an intelligent FLC designer to create stable solar sail attitude control without a priori knowledge or excessive manual workload. The IFLCD uses neural network modelling and automatic design method to solve the black-box and time-varying control problem, making it suitable for unmanned and complicated systems.
Researchers created a thermally stable anatase material for sodium-ion batteries, overcoming key challenges of poor electron conductivity and ion diffusion. The material exhibits good rate performance and excellent cycling stability, with a reversible specific capacity of 228 mAh g−1.
Researchers focus on layered double hydroxides (LDHs) as catalysts for the oxygen evolution reaction (OER), a crucial step in electrochemical water splitting. By summarizing four common strategies to improve OER performance, they aim to design more efficient electrocatalysts.
Researchers discuss micro-supercapacitors' applications in micro-wearable electronics, including integrated circuits. The study highlights the advantages of micro-supercapacitors, such as ultrahigh power density and small footprint, making them suitable for portable devices.
A new method combines Centroidal Voronoi tessellation (CVT) and Model Predictive Control (MPC) to optimize microsatellite swarm trajectories, ensuring collision avoidance while minimizing fuel consumption. Numerical simulations validate the effectiveness of this macro-micro trajectory planning approach.
A new multimodality prediction method jointly learned vision and sequence information for accurate solar wind speed prediction. The model achieved best performance in many metrics, including RMSE, MAE, and CORR, and demonstrated the effectiveness of each module in improving prediction accuracy.
Scientists conducted two 15-day missions in the LunAres Research Base to investigate the psychological effects of isolation and confinement on astronauts. The studies revealed insights into stress responses, cognitive performance, group dynamics, and microbiota in response to living in a low-resource environment.
A new surveillance constellation concept aims to detect and track near-Earth asteroids, providing early warning and tracking capabilities. The system consists of six space-based surveyors and a mothership, which work together to monitor the orbits of potentially hazardous asteroids.
The article discusses the development status of space robot technology and relevant on-orbit assembly technology. Key findings include the shift from manual to autonomous assembly and the need for advanced motion planning and control methods to achieve high-precision operations.
Researchers have discovered that zinc ions enhance the electrochromic properties of titanium dioxide nanocrystals, resulting in fast switching, high contrast, and high stability. This breakthrough has significant implications for the development of cost-effective and rapid electrochromic devices.
Researchers successfully developed cost-effective and high-performance perovskite solar cells using a copper electrode, reducing the performance limitations of traditional silver electrodes. The 'buckets effect' approach allows for balanced energy differences at both the perovskite/HTL and HTL/Cu interfaces, significantly improving cha...
Researchers developed a 20 μm-thick flexible Li6.4La3Zr1.4Ta0.6O12-based solid electrolyte with high ionic conductance and thermal stability. The electrolyte showed excellent oxidation stability, superior thermal stability, and non-flammability.
Researchers discuss benefits of using humanoid musculoskeletal robots and soft robotic systems as bioreactor platforms for producing clinically useful tendon constructs. These systems provide physiologically relevant mechanical stimulation, overcoming the translational gap in current conventional bioreactors.
Researchers have made significant progress in designing and controlling continuum robots, which can be used for targeted therapy and precise control. However, challenges remain, including miniaturization, perception accuracy, and stable simulation engines.
Researchers developed a bionic swimming robot using cultured skeletal muscle tissue and circular distributed multiple electrodes, achieving stable controllability. The robot can be efficiently propelled by only one muscle tissue, making it suitable for various applications.
Researchers designed a centered error entropy-based sigma-point Kalman Filter to enhance the filtering algorithm's robustness in spacecraft attitude determination. The proposed CEEUKF outperformed classical methods and other robust algorithms in simulating non-Gaussian noise, achieving higher accuracy and faster convergence rates.
Researchers create accurate hydrodynamic model of the RobDact underwater robot to improve its control in turbulent waters. The team combined computational fluid dynamics and a force measurement experiment to study the RobDact, enabling better understanding of its motion state and control.
Researchers built a two-stage warning system predicting solar flares within 48 hours via k-means clustering and neural networks. The model improved recall while increasing precision, but lost some positive sample information, affecting prediction accuracy.
The Martian ionosphere's anisotropic characteristics cause dispersion of radio signals, distorting echoes and degrading image quality. A model simulating the ionospheric effect is developed to estimate Mars' subsurface without considering magnetic fields and solar activity.
Researchers propose a surrogate-assisted evolutionary algorithm with restart strategy to optimize electronic component layout in space engineering. The algorithm reduces the cost of thermodynamic simulations, improving convergence speed and solution quality.
The development of LEO mega constellations has significantly impacted human scientific progress in communication, navigation, and remote sensing. However, unrestrained deployment poses a threat to spacecraft safety and space environment stability, requiring rational surveillance and governance mechanisms.
Scientists at Beijing Institute of Technology successfully controlled honeybee steering behavior using unilateral optic lobe electrical stimulation, with an average successful rate of 87% in immobilized status. The study also explored the influence of pulse electrical signal parameters on steering response behaviors.
The review paper analyzed research advancements in data acquisition, target recognition, and monitoring for space situational awareness. The author emphasized the importance of comprehensive reviews and identified emerging trends in multiagent and synergetic constellation technologies.
Researchers used logistic regression and a recommendation algorithm to predict CME arrival times, achieving better results than using either method alone. The hybrid model improved forecast accuracy by providing a reference for similar historical events.
A study found that multicolor lighting alleviated increase in anxiety and negative emotions caused by isolation and confinement. The researchers used Philips Hue Bluetooth wireless light bulbs to project colored light in an isolated room.
A study found that Dragon's Blood alleviates brain damage, hematopoietic dysfunction, and gastrointestinal damage caused by radiation in rats. The compound regulates metabolism and redox homeostasis to protect the liver from damage.
A novel Kalman filter, GMCKF, was proposed to improve robot tracking accuracy in space with complex non-Gaussian noise. The algorithm achieves better performance under various non-Gaussian noises by utilizing a generalized Gaussian density function and automatic parameter selection.
Researchers created a cyborg beetle to study insect flight, using a tiny control backpack and electrodes to stimulate muscles. The study found that the subalar muscle regulates wing rotation angle to adjust body angles and accelerations in free flight, enabling complex maneuvers.
Scientists designed novel hard carbon anodes with controlled defects, pore structures, and cation doping to boost sodium storage capacity. The optimized materials showed improved rate capability, cycling stability, and energy density. Introducing potassium ions regulated the microstructure and surface functionality of the anodes.
Researchers anchored Mo2C nanoparticles onto MAPbI3 to enhance photocatalytic activity for hydrogen evolution. The composite exhibits superior performance, surpassing pristine MAPbI3 and Pt-deposited MAPbI3.
Researchers have developed a new training method for machine learning models to perform blood cell counts, reducing manual annotation work. The U-Net model achieves high accuracy in segmenting images with multiple cell types, promising a simpler and cheaper alternative to traditional cell analyzers.
Scientists have successfully developed lead-free bismuth halide perovskites with broadband emission, overcoming toxicity and instability issues of traditional lead-based materials. The new material exhibits high efficiency and stability, paving the way for potential applications in artificial lighting and displays.
Researchers overview properties and disadvantages of cathode materials, focusing on metal-based compounds and carbon-based materials. Modification methods, including surface treatment and decoration, are discussed to enhance performance of Br-FBs.
The study focused on the analysis and selection of Mars parachute types, with a focus on supersonic speed, low density, and harsh atmospheric conditions. The optimized tapered DGB parachute structure demonstrated improved deceleration performance, meeting the requirements for the Tianwen-1 Mars probe.
The system uses multiple satellites to form an aperture-synthetic interferometer, meeting four key demands: high spatial resolution, contrast, sensitivity, and wide spectral range. Numerical simulations validate the method's efficiency, with reduced transfer times and stable orbit maintenance.
The article reviews key technologies for space intelligent robots in on-orbit operation requirements. Researchers discuss challenges such as microgravity, complex illumination, and strong radiation in space.
This special issue of Energy Material Advances highlights recent progress in synthesizing and tuning perovskite nanocrystals and other emerging nanocrystal materials. Research focuses on fundamental understanding of doping, synthesis, and spectroscopy, as well as applications in solar cells and light-emitting diodes.
Researchers analyzed the effects of environmental pressure setting, time step, and mesh density on the pressure differential calculation results. The study used numerical simulation to improve the accuracy of calculations, with results showing that changes in ambient pressure are the primary factor affecting the pressure differential.
Researchers created two types of hydrogenous-rich composites for shielding space radiation, which showed higher shielding abilities than traditional aluminum. The simulations also revealed that these new composites can reduce the mass needed for shielding by up to 77% when the thickness is larger than 10 g/cm².
Biohybrid micro- and nanorobots promise to deliver drugs to body tissues with high precision, enabling tasks such as cancer treatment, cell microsurgery, and tissue engineering. Researchers envision incorporating novel biological components into robots to overcome immune responses and increase efficiency in manufacturing.
Researchers explore the influence of forebody and afterbody shapes on Mars ascent vehicle aerodynamic performance. Studies reveal that conical forebodies can reduce drag in slender ascent vehicles, while exponential forebodies improve resistance performance in short blunt bodies.
Magnesium-based batteries offer a promising alternative to lithium-ion batteries, with several significant advantages. However, developing cost-effective and high-performance batteries requires further research on electrolyte development, anode design, and cathode structure.
Researchers developed a hybrid machine-learning approach combining CNN and LSTM to recognize complex hand gestures in prosthetic hands. The technique achieved far superior performance than traditional machine learning efforts, with an accuracy of over 80%, but struggled with certain pinching gestures.
Researchers developed an autonomous assembly method for a 3-arm robot to fix a multi-pin and hole load plate on a space station. This solution tackles the challenges of complex environmental lighting and matching multiple groups of holes and pins in the task. The study reduces astronaut safety risks by leveraging robots instead of humans.
Researchers conducted a free-flight ballistic range test to capture the attitude behaviors and aerodynamic characteristics of Tianwen-1 Mars entry capsule. The study revealed that the capsule is dynamically unstable in pitch and yaw directions, but statically stable in these directions.
Researchers developed a recursive composite adaptive control method to improve the accuracy and dynamic performance of robot manipulators in the Chinese Space Station. The new controller reduces computational loads and achieves faster parameter convergence, making it suitable for high-degree-of-freedom robots.