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Prior information and elicitation are the prerequisite in Bayesian reliability inference. Multiple sources for priors such as probability fitting based on historical data and expert judgment are often available when estimating the reliability of complex systems. This paper investigates the integration of multiple priors in Bayesian reliability analysis. Specifically, methods for multiple priors' integration...
In this paper, two ka-band up-link power amplifiers (PAs) using different technology are designed for satellite communication systems. Using 180-nm CMOS process, two stage common-source (CS) power amplifier attained the small signal gain of 12.6 dB, the peak output power of 13 dBm and power-added efficiency of 25.3%. Using 150-nm GaAs pseudomorphic high electron mobility transistor (p-HEMT) devices,...
A 2.4/5.8-GHz dual-band programmable-gain upconverter with a constant IF bandwidth is demonstrated using 0.35-µm SiGe BiCMOS technology. Using a current-mode design approach, the input IF bandwidth remains the same at different gain settings. A dual-band LC current combiner is used at the mixer RF output to combine differential signals to a single-ended one at two bands. Then, a wideband amplifier...
We study Kerr-comb stability with pump laser locked to ultrahigh-Q microresonator. Fractional instability of 1.26×10−10 is achieved, close to comb stability limit, 3.9×10−11 imposed by intensity noise of the optical pumping and environmental fluctuations.
We study the coherent comb formation by a bichromatic pump and detail noise state transitions by detuning the seeding. We also show comb spacing in a coherent state can be tuned by 40 MHz. The work paves a way towards coherently tunable comb oscillator for chip-scale RF-optical frequency division and clockworks.
A silicon photonic temperature sensor based on cladding-modulated grating provides narrowband reflection (0.35-nm), high temperature sensitivity (83 pm/°C) and wide temperature range that outperform the sensors based on ring resonator and strip/slab-type grating counterparts.
We demonstrate a low-power thermo-optical bistability in a graphene oxide-on-silicon micro-ring resonator which not only retains its high quality factor of 56000 but also exhibits a hysteresis loop for a pump power of only 115-μW.
A new kind of optical rogue waves, polarization rogue waves that appear with greatly deviated and unpredictable positions of polarization states, is identified in forming partially mode-locked fiber laser based on parametric frequency conversion.
We demonstrate a method to substantially increase the observation duty ratio in temporal-magnification system without sacrificing the temporal resolution. 30% or even 100% observation duty ratio can be achieved on a 10-ns or longer waveform.
A submicron (280-nm), thin (3-nm) and transferrable graphene oxide grating layer is implemented for the first time by interference lithography, oxygen plasma etching, and PMMA-assisted transfer approach. The diffraction efficiency is measured to be only 4.98×10−7.
The operational efficiency of surgical rooms has a significant influence on the overall performance of a hospital. In this study, we used a multiple regression model to identify the influence of factors on the operational efficiency of surgical rooms. We analyzed the patient flow in the surgical room to identify the potential influencing factors in terms of patients, surgical type, medical staff,...
The essay examined the energy balance of wireless sensor network and found that it is of great value to introduce the game theory into the research, which is still a blank field. We hope to greatly extend the life cycle of wireless sensor network by setting up 3D wireless sensor space game theory energy balance model. We abstract relative information from the node action space, establish utility function...
The effective energy of wireless sensor network is fatal. The research point of this essay is to increase the precision of wireless sensor network, expand effective covering area, effectively decrease energy consumption and achieve network balance. It established high-precision space division and optimized node selection to achieve the energy consumption balance. Through the research, we have found...
HDFS has been widely used for storing massive scale data which is vulnerable to site disaster. The file system backup is an important strategy for data retention. In this paper, we present an efficient, easy- to-use Backup and Disaster Recovery System for HDFS. The system includes a client based on HDFS with additional feature of remote backup, and a remote server with a HDFS cluster to keep the backup...
Neighborhood Covering Reduction (NCR) is an effective tool to learn rules from structural data for classification. However, the existing neighborhood covering model is not robust enough. A neighborhood is constructed according to the nearest heterogeneous samples. This strategy over focuses on the boundary samples and makes the model sensitive to noise. To tackle this problem, we proposed a Rough...
A fully integrated downconverter which converts the RF signal from the Ku-Band (10.7 GHz – 12.75 GHz) to the L-band (0.95 GHz – 2.15 GHz) is a current application in the Direct Broadcast Satellite system. With characteristics of low noise and high gain for pHEMT process, the demonstrated downconverter exhibits a conversion gain of 32 dB, and a single-sideband noise figure of 2 dB within the Ku-band...
Self-interference cancellation technologies enable full-duplex operation at the eavesdropper. In addition to wiretapping, the eavesdropper simultaneously tries to reduce the secrecy rate of the illegitimate transmitter-receiver pair by jamming its receiver. On the other hand, the transmitter-receiver pair aims to increase its secrecy rate. To examine the power decision processes between the transmitter...
The effect of layout on silicon SBD in CMOS process is studied in this paper. The size of anode area not only affects the series resistance and SBD junction capacitance but also causes serious parasitic effect from cathode to the p-substrate. Typically, an SBD of a small unit anode has a better cut-off frequency than that of a large unit anode. The cutoff frequency of a small anode Schottky diode...
For the first time, we report low-cost heterogeneously integrated sub-40nm epi-like Si monolithic internet of thins (IoT) 3D+-IC with wireless communication, light-electricity power management and vertical ReRAM (VRRAM) modules. High current driving multi-channel 3D+ UTB-MOSFETs (600μA/282μA@VG= ± 1V for 10-channel P/N FETs) was fabricated by low thermal budget super-CMP-planarized visible laser-crystallized...
In recent years, fraud is becoming more rampant internationally with the development of modern technology and global communication. Due to the rapid growth in the volume of call logs, the task of fraudulent phone call detection is confronted with Big Data issues in real-world implementations. While our previous work, FrauDetector, has addressed this problem and achieved some promising results, it...
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