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3D temperature mapping of passive cooling structures built by additive manufacturing was interrogated by in-fiber Rayleigh backscattering using optical frequency domain reflectometry for therm-mechanic structure optimization for laser and photonic systems.
Graphic user interface (GUI) is an integral part of many software applications. However, GUI testing remains a challenging task. The main problem is to generate a set of high-quality test cases, i.e., sequences of user events to cover the often large input space. Since manually crafting event sequences is labor-intensive and automated testing tools often have poor performance, we propose a new GUI...
This study helps telecom operators to establish device security monitoring and centralized statistical analysis tools for an entire telecom operator network. Operators can use the proposed process to monitor device security in a variety of heterogeneous network architectures. We propose ISMS, an Integrated Security Monitoring System for monitoring security events on digital service network devices...
On stochastic transport network, travelers tend to reserve travel time budget (TTB) for every alternative route, to assure their on-time arrive with a predefined confidence level. This paper incorporates the concept of TTB into a deterministic nonlinear dynamic system, to model the day-to-day evolution process of travelers' risk-taking route choices on stochastic degradable road network. This paper...
Non-line-of sight (NLOS) radio signal propagation can cause significant localization errors in centralized indoor localization systems. While a distributed localization system could effectively identify NLOS propagation, it usually requires more power and computational resources. This paper proposes an localization algorithm to take advantage of both methods and avoid their drawbacks. In the absence...
Dynamic functional connectivity analysis, a rapidly growing method, has been demonstrated to provide new spatiotemporal information about how brain motor network would reorganize from rest to motor tasks. Phase synchronization analysis, which has been widely applied in EEG-based FC analysis, is a promising alternative method in dynamic FC analysis. In this study, fMRI data were recorded from 28 healthy...
A traditional addictive manufacturing (AM) system is composed of 3D digital design technology, chromatics, material jetting, material science, digital manufacturing and intelligent control of a mechatronics system. However, there are plenty of disadvantages in such a system such as uneven size of droplet, unstable printing process and low quality of end product, which may even cause the piezoelectric...
With the development of economy, logistics becomes more and more important. Logistics efficiency depends on the structure of logistics networks. This paper briefly review the studies about complex networks from perspectives of statistical properties, structural models and application areas. Logistics networks and complex networks have same behavior pattern, so we can apply the theories of complex...
Chaotic oscillation is a harmful phenomenon for power system and it threatens the safe and stable operation of power system. This paper presents fractional order fixed-time nonsingular terminal sliding mode control to suppress chaos in power system. A novel fractional order terminal sliding mode surface is first proposed to guarantee the fixed-time convergence of system states along the sliding surface,...
Low-power wireless technology, i.e., IEEE 802.15.4, consumes less energy and is suitable for battery-powered applications; fixed-interval data reporting is a common characteristic of these applications, e.g., a wireless sensor needs to report its temperature or air quality every minute. However, data-receiving failure occurs frequently because the output power of such wireless technology is low, typically...
This paper summarizes two novel concepts of antenna design for the applications of wireless power transmission at short distance. The design considers the near-field radiation characteristics of antenna to enhance the energy transfer efficiency. In particular, the first one considers the energy reaction when the transmitting (TX) and receiving (RX) antennas are very close to each other, where the...
This study exploits the CMOS-MEMS technology to demonstrate a condenser microphone without back-plate. The reference sensing electrodes are fixed to the substrate, and thus no back-plate is required. To reduce the unwanted deformations resulted from the thin-film residual-stresses and temperature variation for the suspended CMOS-MEMS structures, the suspended acoustic diaphragm and sensing electrodes...
This study presents a novel capacitive pressure sensor implemented by TSMC 0.18μm 1P6M CMOS process. Features of this design is to exploit double deformable sensing diaphragms to enhance the sensitivity of capacitive pressure sensor (Fig. 1a). Moreover, the sensing diaphragms with trenches can further improve the sensitivity due to stiffness reduction. The sensitivity of designed pressure sensor with...
We firstly propose an efficient-mobile-fronthaul with single-intermediate-frequency and sample-wise TDM for new-radio massive MIMO applications. It is simple in architecture/DSP, spectral-efficient, and has low-latency/high-performance. Bi-directional new-radio/LTE-A mobile-fronthaul with 32×32 MIMO and 2-RRHs are experimentally demonstrated.
We firstly propose to apply orthogonal-chirp-division-multiplexing in MMW fiber-wireless-integrated systems. It supports enhanced-mobile-broadband and ultra-reliable low-latency transmissions, and is more robust to system degradations and interferences, as experimentally demonstrated with up to 5-dB EVM improvement.
We propose and experimentally demonstrate a synchronization method based on the linear regression of phase response over an anchor downlink band to provide optimal suppression for self-interference cancellation in centralized software-defined-radio fiber-wireless systems.
We propose a reconfigurable millimeter-wave radio bundling method to improve system efficiency and transmission reliability in multi-section fiber-wireless mobile fronthaul. A multi-point multi-section experiment demonstrates improved signal quality and reliability.
A 13.56 MHz wireless power receiver designed with standard CMOS 0.35 μm process used for implantable medical devices (IMDs) is presented. By adopting a one-stage 0X/1X reconfigurable resonant regulating (R3) rectifier, the proposed architecture inherently avoids system voltage conversion ratio (VCR) variation and power conversion efficiency (PCE) degradation problems and thus widens the operation...
Schizophrenia is a severe psychiatric disorder that affects individuals across the course of their lifetime. Neurocognitive deficits are a typical characteristic of this disorder and are prominent in many cognitive domains including attention and fluency. Despite the recognized importance, patient cognition is rarely monitored as a regular part of treatment and even then, only with behavioral metrics...
Along with the growing demands of hypersonic vehicle reentry guidance in autonomy, robustness, and situation with insufficient performance of current methods, one compound reentry guidance method is proposed based on altitude-velocity reference profile on-board regeneration and tracking. Aiming at the vehicle reentry problem, overall guidance scheme and related key technologies are studied in this...
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