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We propose and experimentally demonstrate a novel scheme for simultaneous optical sensing of electric memory cell states. Results show that the effective sensing speed can be enhanced by 976 times with 100 nm spectrum ranges.
Wireless power transfer has been widely used in various applications and been intensively researched recently, especially after the mid-range resonant inductive coupling was proposed. Most resonant inductive coupling systems are narrowband, which limits their adaptability and application. A spherical helix is proposed for a wireless power transfer system with a wider bandwidth. The system with the...
In this study, the influence of adding Sn-0.7Cu, Sn-1.2Cu, Sn-3.0Ag-0.5Cu and Sn-4.0Ag-0.5Cu coating into Sn-58Bi/Cu interface was investigated during thermal aging by scanning electron microscopy with Energy Dispersive X-ray. And the coatings of the Sn-based solder on the Cu were made by using hot-dip method. The result showed the Sn-based coating on the Cu was effective at suppressing the IMCs'...
In these study, the effect of Bi content on shear strength of Sn-xBi (x=0, 2.5, 5, 15) solder balls were investigated. The Bi addition could improve the shear strength of solder balls, added 2.5wt.% Bi into pure Sn solder alloys had a greater increase in shear strength. The fracture mode always remained the same and the shear strength had no obvious changes with increasing the aging time. The Sn-2...
Cyber-criminals use various malware technologies to bypass antivirus software. For example, drive-by downloads happen without a person's knowledge when visiting a website, viewing an email message, or clicking on a deceptive pop-up window. One way to understand drive-by download attacks is to study the connections between different drive-by download behaviors during the installation phase. However,...
This manuscript describes a 34–42GHz single-sideband 90nm-CMOS transmitter where PLL has been integrated into the LO chain and, with I/Q input and two-stage up-conversion, a 30dB image-rejection ratio is achieved within the intended bandwidth. This transmitter's wideband tuning range is made possible by the use of additional capacitor on the VCO, and the phase noise of the resulting RF output is in...
This manuscript describes the Q-band 90nm-CMOS receiver design where the 33∼50GHz RF-LNA, actively-biased double-balanced mixer, 10GHz IF amplifier, wideband frequency tripler and power amplifier in the LO chain are all integrated into one single chip. With overall power consumption of 170mW under 1.2V bias, the measured conversion gain is 15dB, noise figure close to 8dB, input-referred P1dB around...
There is an increasing demand for flexible and wearable strain sensors for the potential applications in wearable monitor, including human activities, human-machine interfaces and master devices for teleoperated robotic system, etc. Herein, we propose a highly stretchable strain sensor developed by structured single-walled carbon nanotube /carbon black (SWCNTs/CB) networks for wearable monitor. The...
With the development of artificial intelligence algorithm, BP neural network algorithm is widely used in many fields, such as fault diagnosis, intelligent control and dynamic signal processing, because it has many advantages for example self-learning, self-organization and nonlinear mapping. Compared with BP neural network, the hidden Markov model is suitable for dynamic time series modeling and has...
Typhoon is the most frequent natural disturbance in northwest Pacific Ocean, and it is an important factor to affect the structure and function of forest ecosystem in East Asia [1, 2]. Recent observations revealed that climate change may alter the intensity or frequency of typhoons in the past decade [3, 4]. Assessing the potential impacts of extreme typhoon events on ecosystem structure and carbon...
Newly Emerging Science and Technologies (NESTs) bring numerous innovation opportunities and challenges. At the same time, the highly uncertain dynamics of NESTs pose special challenges to traditional technology forecasting tools. Dye-Sensitized solar cells (DSSCs), a promising third-generation photovoltaic technology, can add functionality and lower costs, enhancing the value proposition of solar...
As one of the most representative emerging technologies, big data analytics and its related applications are rapidly leading the development of information technologies and are significantly shaping thinking and behavior in today's interconnected world. Exploring the technological evolution of big data research is an effective way to enhance technology management and create value for research and...
A novel rotational speed sensor consisting of a fiber Bragg grating is proposed. As the grating glued to the surface of a metal rod was driven by a disc, the grating wavelength was shifted back and forth to cause the change of reflection power for measuring the frequency of on-off change for obtaining the rotational speed.
Aiming at the problem that the 3D DV-Hop localization algorithm has great error in the location of coal mine roadway, an improved three-dimensional DV-Hop fixed node location method is proposed based on the relationship between the geometric model of coal mine roadway and the sensor node. Based on the traditional 3D DV-Hop calculation hops and the lack of distance between nodes, the difference method...
Differential Evolution (DE) is obviously one of the most powerful and versatile evolutionary algorithm for solving many complex real-world optimisation problems e ciently in recent times. Since their introduction in 1995, the focus of research in DEs has largely been on the variants side with so many new algorithms proposed on the original DE algorithm. However, each operator is only suitable for...
In this paper, Quantum Rotate Gate is improved, which is the main operation in the Population Update of the traditional Quantum Evolutionary Algorithm. A new rotation angle is defined, preventing the algorithm from easily falling into local optimum state in the middle and late term. Based on the characteristics of TSP, a modified quantum rotate gate is proposed in this paper to adaptively adjust the...
This paper presents detailed modeling of a novel electro-hydraulic variable valve actuator for internal combustion engines that is capable of continuously varying valve timing and dual-lift. First, nonlinear mathematical system model is developed component-by-component, considering electromagnetic, mechanical, and fluid dynamics, time delay and time-varying parameters. Second, in order to develop...
Silicon photonics circuits are playing more and more important role in optical communication and interconnect fields [1, 2]. Many silicon CMOS technique compatible photonics integrated devices are reported [3, 4]. Most of those silicon components are based on optical waveguide. But conventional integrated optical waveguide is without memory feature. One hand, which makes us in trying to change the...
We demonstrate silicon Mach-Zehnder modulators with efficient (VπL = 0.46Vcm at a bias of −0.5V) and low-loss phase-shifters for the O-band. A 2-mm long device had a 3-dB bandwidth of 13 GHz and supported 24Gb/s modulation.
A polarization splitter and rotator that supports simultaneous O-, C-, and L-band operation is first experimentally demonstrated, with record 1-dB bandwidth over 360 nm, high fabrication tolerance, and high TE-TM conversion efficiency of −0.33 dB.
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