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This paper proposes a power-efficient capacitor-array-based digital-to-time converter (DTC) using a constant-slope approach. Fringe-capacitor-based digital-to-analog converter (C-DAC) array is used to regulate starting supply voltage of the constant slope fed to a fixed threshold comparator. The proposed DTC consumes only 15 μW from a 1V supply, while achieving fine resolution of 103 fs when running...
The traditional metal plate bending process is difficult to meet the requirements of modern shipbuilding industry, and this paper adopts a new incremental bending process for manufacturing metal plate based on minimum energy principle and dieless forming. This process uses a set of punches and a series of highly adjustable and head rotatable supports to complete the punching process by changing the...
In speech emotion recognition (SER), speech data is usually captured from different scenarios, which often leads to significant performance degradation due to the inherent mismatch between training and test set. To cope with this problem, we propose a domain adaptation method called Sharing Priors between Related Source and Target classes (SPRST) based on a two-layer neural network. The classifier...
The number of pixels in a hyperspectral image is one of the main reasons that affects pixel unmixing (especially end-member extraction). Superpixel segmentation techniques can compose adjacent pixels with similar characteristics into image blocks, and retain useful information for further image processing, thereby significantly reduce the number of pixels involved in endmember extraction and solve...
In this paper, a technical solution to suppress the fluctuation of resistive switching in resistive random access memory (RRAM) is proposed based on the physical understanding. To investigate the impact of thermal effect, we focus on ion migration affected by diffusion/drift forces and Joule heating. The results reveal that the duration of pulse width results in larger variation in LRS distribution...
Write disturb on half-selected (HS) cells is investigated through electrical measurements and large-scale array simulations. The experimental results collected from the individual devices under constant stress voltage and consecutive pulse operation are correlated with the HS cells in large-scale arrays based on a physics-based SPICE compact model. The impact of write/read disturb on the HS cells...
3D RRAM array suffers more serious reliability issues than 2D array due to the additional dimension involved. This paper systematically assesses the cell-location-dependent write-access (selected cells) and disturbance issues (unselected cells) for a 3D vertical RRAM array. Using a combination of experiments and simulations, a methodology is developed to enable array-level evaluation by conducting...
A comprehensive assessment methodology for the design and optimization of cross-point resistive random access memory (RRAM) arrays is developed based on a simulation platform implementing an RRAM SPICE model with intrinsic variation effects. A statistical assessment of write/read functionality and circuit reliability is performed via quantifying the impact of array-level variations on RRAM memory...
The role of pulse rise time during RRAM programming of cross-point arrays is investigated. The parasitic components in memory arrays is shown to result in distortion and degradation of the applied pulse on the memory cells (compared to the ideal/as-generated pulse), and will potentially cause programming failure. For the first time, the impact of pulse rising edge on the switching voltage is measured...
Recently, the needs of underwater robot used for many kinds of underwater work become higher and higher. In order to control the motion of underwater robot automatically, it is an indispensable to measure its position correctly in real time. Conventional systems are based on time difference or phase lag. However, they must use expensive components, such as transponders or atomic clock, and its system...
We simulated time reversal communication with using simple ray theory. Assuming equable temperature and a static water tank, we geometrically calculated the multipath waves with using Pythagorean Theorem. We simulated both time reversal and general BPSK communication by using 10 kHz bandwidth. The result shows this simulation is available for time reversal simulation under the specified situation...
In those days, survey of deep sea floor is increasing importance and many kinds of facility are using for it. Autonomous under water vehicle (AUV) is one of the facilities and thought to be most effective method than remotely operated vehicle (ROV) or human operated vehicle. The main function of AUV is to design navigation course for survey by itself and complete the mission with keeping the course...
A diffusion doping approach is adopted to fabricate Al-doped HfO2 resistive random access memory (RRAM) devices, using the new Hf/Al/Hf diffusion structure with a two-step furnace annealing process, to avoid the formation of AlOx interfacial layer between HfO2 layer and electrodes. The uniformity of key switching parameters is improved significantly in the Al-doped HfO2 devices. This performance improvement...
On-demand resource provisioning is with great challenge in cloud systems. The key problem is how to learn about the future workload in advance to help determine resource allocation. There are various prediction models developed to predict the future workload. The major problem of previous researches is that they assume that application workload has static pattern. In practice, so many application...
A self-selection and self-compliance bipolar RRAM cell based on TiN/HfOx/n+-Si structure is proposed for the CMOS compatible and ultra low power cross-point array application. Electrical forming scheme is important to achieved desired resistive switching performance due to the existing of interface sub-oxide layer. For RRAM cell, ultra-low RESET current < 0.5 μA and good reliability (retention...
This paper presents a unified physical mechanism of TMO-RRAM to elucidate unipolar and bipolar resistive switching behaviors and the cell design methodology including based on the unified physical mechanism. The developed cell design methodology material-oriented cell engineering and innovative operation-scheme is implemented to the optimization of TMO-RRAM cells, identifying the validity of the methodology.
Recent advances in automated analysis of on-line chat data allow us to draw conclusions about social behavior, such as leadership, in small groups previously possible only through manual methods of observation and analysis. We have applied such methods to comparable English and Chinese language data, defined a new language use called Tension Focus, and demonstrate its different effects in the data...
In this paper, the model of theoretical line loss calculation for high voltage network is studied. A new technique, also a new method of developing the graphic theoretical line loss calculation software for high voltage network is proposed, which uses Microsoft Visio2003 as development platform and Visual Basic for Applications (VBA) as secondary development tool. Based on the electrical connection...
In this paper, we propose a new component-based dynamic model, in which the parallel connection of induction motor and constant-impedance is applied to describe the load of power network. The original data for parameter identification is derived from network dynamics calculations. Consider the compositions of load are varying with time, season and weather, the different incentives and responses can...
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