A5100665509- Aluminum Alloy Microstructure Properties
- Soft Robotics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Aluminum Alloys Composites Properties
- Microstructure and mechanical properties
- Advanced Electron Microscopy Techniques and Applications
- Shape Memory Alloy Transformations
- Analog and Mixed-Signal Circuit Design
- Photoacoustic and Ultrasonic Imaging
- Graphene research and applications
- Structural Engineering and Vibration Analysis
- Advancements in Battery Materials
- Hydrocarbon exploration and reservoir analysis
- Advanced MEMS and NEMS Technologies
- Sensor Technology and Measurement Systems
- Surface and Thin Film Phenomena
- Geological Studies and Exploration
- Nanopore and Nanochannel Transport Studies
- Advancements in PLL and VCO Technologies
- Advanced Welding Techniques Analysis
- Ultrasound Imaging and Elastography
- Cervical and Thoracic Myelopathy
- Ear Surgery and Otitis Media
- Fire Detection and Safety Systems
- Urban Heat Island Mitigation
Chongqing University
2024-2025
Hainan University
2023-2024
Jiangnan University
2024
Hunan University
2008-2023
Chinese University of Hong Kong
2021-2023
University of Hong Kong
2021
Wuhu Hit Robot Technology Research Institute
2021
China University of Petroleum, Beijing
2018
East China University of Science and Technology
2013
Zhongshan Hospital of Xiamen University
2010
We report translocation experiments on double-strand DNA through a silicon oxide nanopore. Samples containing fragments with seven different lengths between 2000 to 96000 basepairs have been electrophoretically driven 10 nm pore. find power-law scaling of the time versus length, an exponent 1.26 $\pm$ 0.07. This behavior is qualitatively from linear observed in similar performed protein pores. address nonlinear theoretical model that describes where hydrodynamic drag section polymer outside...
Metals usually have three crystal structures: face-centered cubic (fcc), body-centered (bcc), and hexagonal-close packed (hcp) structures. Typically, metals exhibit only one of these structures at room temperature. Mechanical processing can cause phase transition in metals, however, that all the rarely been approached, even when hydrostatic pressure or shock conditions are applied. Here, through situ observation atomic-scale bending tensile process ∼5 nm-sized Ag nanowires (NWs), we show is...
Age-hardening in Al alloys has been used for over a century to improve its mechanical properties. However, the lack of direct observation limits our understanding dynamic nature evolution nanoprecipitates during age-hardening. Using in-situ (scanning) transmission electron microscopy (S/TEM) while heating an Al-Cu alloy, we were able follow growth individual at atomic scale. The heat treatments carried out 140, 160, 180 and 200 °C reveal temperature dependence on kinetics precipitation three...
Ultrasound (US) is commonly used in percutaneous needle procedures for real-time guidance. Accurate and robust automatic tracking highly desirable to address the influence of noise artifacts US images. This letter presents a approach which combines an improved compressive (ICT) algorithm modified Sage-Husa adaptive Kalman filter (SHAKF) achieve tip under 2D US. Estimated insertion velocity improve performance while high pixel intensity correct drift. A simplified SHAKF then implemented...
Shape memory alloy (SMA) has been adopted in medical robotics due to its high power density, compactness, and imager compatibility. However, use clinical applications remains limited low actuation bandwidth the lack of proper system integration approaches, leading poor control accuracy repeatability. In this article, we report design, modeling, characterization a high-performance SMA actuator for real-time application. It uses nichrome wire fast heating forced air convection active cooling...
It is demonstrated that the negative highest occupied molecular orbital eigenvalues of a molecule S in gas phase, −HOMO(S,g), and solution, −HOMO(S,s), lowest unoccupied eigenvalue its cation S+ −LUMO(S+,s), are good approximations to oxidation energy, energy for removing an electron out solution. This observation based on DFT calculations using B3LYP exchange–correlation functional with basis set 6-311+G(d,p) polarizable continuum model (PCM) computing solvation energies 22 middle-size...
Transoral robotic surgery (TORS) in upper aerodigestive tract remains challenging due to the rigidity and insufficient workspace of existing instruments, inappropriate balance between compliance stiffness flexible instruments. In this letter, a surgical instrument, featuring shape memory alloy (SMA)-based continuously variable length bending joint (CVLBJ), was developed for TORS. The integration CVLBJ allows adjustment, leading enhanced distal compared traditional fixed instrument also...
Microbial cell factories utilize renewable raw materials for industrial chemical production, providing a promising path sustainable development. Bacillus subtilis is widely used in industry its food safety properties, but challenges remain the limitations of microbial fermentation. This study proposes novel strategy based on lifespan engineering to design robust B. chassis cells supplement traditional metabolic modification strategies that can alleviate autolysis, tolerate toxic substrates,...
This paper describes a high precision order curvature compensated bandgap voltage reference in 0.5-µm 2P3M n-well mixed signal CMOS technology. newly proposed utilizes Buck's transfer cell and temperature independent current, to provide compensation of the V <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">BE</inf> . Cascode structures are also introduced this improve power supply rejection ratio (PSRR). circuit achieves 5.6 ppm/°C coefficient...
The discrete algebraic reconstruction technique has many advantages in computed tomography and electron tomography. However, the number of gray levels absolute values that should be known advance are typically not available experiments especially when there image. In this paper, we report an automatic algorithm to improve its feasibility practice, without needing know these two parameters. our algorithm, is estimated by labeling connected components tomogram them determined modal value each...
Shale gas exploration in China started late but is progressing very quickly with the strong support from Central Government. has 21.8 tcm technically recoverable shale resources and 764.3 bcm proved reserve, mainly marine facies Sichuan basin. In 2016, overall production around 7.9 bcm, while it set to reach 10 2017 30 2020. BP only remaining IOC actor partnering CNPC 2 blocks encouraging business both at level Provincial through establishing development plan, continuation of subsidies...
Ultrasound (US) is widely used in image-guided needle procedures. Correctly tracking the tip position US images during procedure plays an important role improving targeting accuracy and patient safety. This paper presents a leaning-based visual network with Siamese architecture, which makes full use of attention mechanism to explore potential global features takes advantage online target model prediction module robustly track images. Several self- cross-attention modules are applied learn...
Transmission electron microscopy was used to investigate the formation mechanism of SiC bi-nanowires (BNW) with a Y-shaped junction. Different from previously reported growth mechanisms, our study suggests that when two individual nanowires are growing through vapor–liquid–solid meet proper angle, they will merge and form straight symmetric BNW its side-branches maintaining their original crystallographic orientations sharing same direction, which can be ⟨110⟩, ⟨112⟩ or ⟨113⟩, depending on...
Pericardiocentesis is the drainage of excessive fluid in pericardium surrounding heart under ultrasound guidance. The percutaneous procedure comes with risk cardiac perforation since needle inserted towards beating heart. This letter presents a novel robot that features flexible wrist made shape memory alloy (SMA) spring which can vary its stiffness through temperature variation. SMA be heated and thus stiffened to allow insertion. At lower temperature, it behaves like backbone allows bent...
Millimeter-scale continuum bending actuators are useful in minimally invasive surgery to allow distal visualization and manipulation outside the line of sight. This paper presents a new actuator based on shape memory alloy (SMA) with variable length. It consists two SMA wires antagonistically configured produce bidirectional under Joule heating. A linearly actuated rigid tube along longitudinal axis enables continuous length adjustment, thus enhancing its workspace force range. The proposed...