A5074460700- Electronic Packaging and Soldering Technologies
- Building Energy and Comfort Optimization
- Refrigeration and Air Conditioning Technologies
- Modular Robots and Swarm Intelligence
- Soft Robotics and Applications
- Injection Molding Process and Properties
- Micro and Nano Robotics
- Traffic control and management
- Traffic Prediction and Management Techniques
- Wastewater Treatment and Nitrogen Removal
- Anaerobic Digestion and Biogas Production
- Adsorption and Cooling Systems
- 3D IC and TSV technologies
- Traffic and Road Safety
- Transportation Planning and Optimization
- Lattice Boltzmann Simulation Studies
- Power Line Inspection Robots
- Electrostatic Discharge in Electronics
- Heat Transfer and Optimization
- Rheology and Fluid Dynamics Studies
- Metal Forming Simulation Techniques
- VLSI and FPGA Design Techniques
- Material Properties and Processing
- Greenhouse Technology and Climate Control
- Urban Heat Island Mitigation
National University of Singapore
2022-2023
Beijing Jiaotong University
2022
The University of Queensland
2021
Anhui University
2013
Southeast University
2011
Guangzhou University
2005-2009
Flip-chip underfill process is a very important step in the flip-chip packaging technology because of its great impact on reliability electronic devices. In this technology, used to redistribute thermo-mechanical stress generated from mismatch coefficient thermal expansion between silicon die and organic substrate for increasing packaging. article, models which have been describe properties flow driven by capillary action are discussed. The included apply Newtonian non-Newtonian behavior...
This article describes an analytical model for the prediction of underfill flow characteristics in a flip-chip package driven by capillary action. In this model, we consider non-Newtonian fluid properties encapsulant as opposed to most other studies where Newtonian were assumed flow. The power-law constitutive equation was applied our study. simulation based on agreed well with measurement obtained from experiments available literature. It further shown that performs better than Washburn...
Soft robotics is one of the most popular areas in field due to advancements bionic technology, novel materials, and additive manufacturing. Existing soft crawling robots with specific structures have a single locomotion mode cannot complete turning. Moreover, some silicone-based lack stiffness, leading unstable movements especially when climbing walls, limited environmental adaptability. Therefore, this study, robot multi-movement high adaptability proposed. As main structure robot,...
In the prediction of underfill flow in a flip-chip package, numerical methods are usually used for analysis and simulation since analytical cannot meet requirement predicting fluid distribution planar analysis. At present, there appears to be no software commercially available that is able provide adequate process driven by capillary force micro-cavity situation. study presented this paper, model was proposed flow. model, power-law constitutive equation describe non-Newtonian behavior...
Compared with rigid robots, soft robots have the advantages of strong environmental adaptability, good human-robot interaction, and simple control systems; therefore, actuators been widely studied in recent years. Based on DLP 3D printing technology, this study makes three kinds pneumatic actuators: gripper auxetic structure, Elongation Bellow Actuator (EBA) Omnidirectional Bending (OBBA). Through experimental testing finite element simulation, it was found that these characteristics fast...
Soft robotic systems are well suited to unstructured, dynamic tasks and environments, owing their ability adapt conform without damaging themselves or surroundings. These abilities crucial in areas such as human-robot interaction, simplification of control system weight reduction. At present, the existing soft mobile robots still have disadvantages single motion mode application scenario, difficult manufacturing low energy conversion efficiency. Based on current shortcomings robots, this...
This study evaluated the operational impacts of an unconventional outside left-turn lane design used at some signalized intersections in China. Using traffic data collected from 10 approaches to five where both traditional inside and lanes are installed, research team compared turning speeds saturation flow rates for left-turning vehicles lanes. The found that had relatively higher than those differences speed were statistically significant passenger cars heavy vehicles. However, did not...
The underfill flow process is one of the important steps in Microsystems technology. One best known examples such a with flip-chip packaging technology which has great impact on reliability electronic devices. For optimization design and parameters or real-time feedback control, it necessary to have dynamic model that computationally efficient yet reasonably accurate. development involves identifying any factors can be neglected negligible loss accuracy. In this paper, we present study...
In this article, we present a theoretical study on the concept known as critical clearance for flip-chip packages. The phenomenon was first observed in an experiment reported by Gordon et al. (1999, “A Capillary-Driven Underfill Encapsulation Process,” Advanced Packaging, 8(4), pp. 34–37). When is below value, filling time begins to increase dramatically, and when above influence of insignificant. Therefore, optimal solder bump density package should be one with larger than clearance....
The effect of different pretreatment methods on anaerobic H2 production from a sucrose-rich synthetic wastewater was investigated in this work. substrate utilization, formation aqueous products, and microbial diversity sludge all markedly depended these methods. highest according to the values for maximum rate 27.57 ml h−1, specific 2.962 g-VSS yield 1.617 mol glucose−1 observed by pretreated with butyrate (pH = 2). Correspondingly, main communities were Clostridium sp. HPB-16, HPB-46,...
Abstract To realize the real-time monitoring of pipelines, this paper designs a pneumatic soft pipeline outer wall-crawling robot composed OMCA (outer multi-cavity actuator) based on motion inchworm. The consists torso and two grippers. It is controlled by three air pumps can linear motion. Use ABAQUS to perform finite element analysis measure its key geometric parameters under different pressure levels, then test robot’s kinematic performance. movement speed pipe with diameter 10 cm 0.3 mm/s.
The Variable Speed Limit (VSL) system is a dynamic freeway control system, which can be used to adjust the posted speed limit in response real-time traffic flow characteristics and weather conditions. primary objective of this paper select optimal VSL on freeways by evaluating effects strategies. A widely microscopic simulation package, PARAMICS, was strategies were integrated into model through Application Programming Interface (API) using C++ programming language. Eight tested for their...
The primary objective of this study is to evaluate the effects intervention startup threshold in Variable Speed Limits (VSL) system for improving traffic safety and identify optimal threshold. micro-simulation software PARAMICS was selected applied conduct evaluating tests different strategies. Crash potential used as crash prediction method real-time safety, five levels were tested their on operation efficiency. results have shown that VSL can significantly improve roadways. level with high...
Year-round energy-efficient operation is presented for a two-pipe fan-coil unit air-conditioning system with independent fresh air supply. The study investigated two typical in-room operating modes: the dry mode in which room cooling coil does no latent and wet used dehumidifying part of moisture from conditioned space. investigation shows that given indoor temperature relative humidity level, changeover time hot-cold water same mode, but energy consumption required more than during periods...
A study was carried out to investigate the influence of outdoor air parameters on energy-saving capability in an air-conditioned building with heat-pipe used air-conditioning processes. The indicates that sensible heat recovered by is related wet-bulb temperature and difference dry-bulb temperatures. lower design larger temperatures, more heat-pipe. Compared conventional air-handling method, system pipe incorporated cooling coil unit can significantly reduce both load total energy a central system.