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In recent years, the demand for memory performance has grown rapidly due to the increasing number of cores on a single CPU, along with the integration of graphics processing units and other accelerators. Caching has been a very effective way to relieve bandwidth demand and to reduce average memory latency. As shown by the cache feature table in Fig. 23.9.1, there is a big latency gap between SRAM...
A demonstration is made of the high-speed real-time image processing capabilities of the SCAMP-5 vision chip. The device provides a software-programmable 256×256 pixel-parallel SIMD processor array. In the example application, the IC can determine dimensions and the location of a single object, at a sustained rate of 100,000fps. At 30,000fps, the chip can return the same metrics from 5 objects. This...
In this paper, a micro jet impingement structure is proposed to realize effectively heat transfer of high power integrated LED array. Based on water cooling technology with double inlets and outlets, an 800W power lighting system structure model is established by using Engineering Fluid Dynamics (EFD) software, the maximum working temperature of the model is lower than 42.3455°C when the shell structure,...
Fast growing large-scale systems enable scientific applications to run at a much larger scale and accordingly produce gigantic volumes of simulation output. Such data imposes a grand challenge to post-processing tasks such as visualization and data analysis, because these tasks are often performed at a host machine that is remotely located and equipped with much less memory and storage resources....
In the era of petascale computing, more scientific applications are being deployed on leadership scale computing platforms to enhance the scientific productivity. Many I/O techniques have been designed to address the growing I/O bottleneck on large-scale systems by handling massive scientific data in a holistic manner. While such techniques have been leveraged in a wide range of applications, they...
A vision chip operating with 1.9pJ/OP efficiency has been fabricated in 0.18µm CMOS. Each of the 256×256 pixel-processors (dimensions 32×32µm), contains 14 binary and 7 analog registers coupled to a photodiode, an arithmetic logic unit, diffusion and asynchronous propagation networks. At the chip's periphery, facilities exist to allow pixel address extraction, analog or digital readout. The chip has...
Presented in this paper is a demonstration system that uses a low-power SCAMP-5 256×256 vision-chip to locate and count multiple objects moving at high speed along arbitrary trajectories. The hardware consists of a SCAMP-5 IC, its power supply system and a Xilinx Spartan3 controller. At 100,000fps, the SCAMP-5 chip can locate and readout the coordinates of a single closed-shaped object amongst clutter...
With the unique features of low gas temperatures, low breakdown/discharge voltages and high concentrations of chemically reactive species, radio-frequency, atmospheric-pressure glow discharge (RF APGD) plasmas produced using a water-cooled bare-metallic electrode plasma generator configuration have been used widely in the fields of plasma-based etching, deposition, disinfection/sterilization of heat-sensitive...
Based on the second development technique of ANSYS, the finite element analyses of lateral log are made in this paper. Finally, fundamental procedure is applied in the example of finite element analyses of lateral log.
This live demonstration presents a vision system based on a digital SIMD vision chip with in-pixel processing capabilities. The system is comprised of asynchronous/synchronous processor array (ASPA2), embedded custom microcontroller with interface circuits and software development environment. Execution of a number of low and medium level image processing algorithms in real time is demonstrated.
We study the problem of maximizing path availability in mesh networks against simultaneous failures of multiple links without using protection schemes. The links belong to shared risk link groups (SRLGs) that have arbitrary failure probabilities. This problem is NP-hard, so we propose heuristic algorithms for networks with large numbers of SRLGs, as well as optimal solutions for networks with smaller...
We propose a new two-stage approach to estimate the central direction-of-arrival (DOA) and angular spread of locally distributed source. In contrast to earlier works, an advantage of this method is that it has decoupled the central DOA and angular spread based on the steering vector which is a Schur-Hadamard product. So the central DOA can be estimated in a preliminary stage, and then angular spread...
In practical applications, mismatches between assumed and actual array responses lead to serious degradation of SINR at the array output. In this paper, we propose robust CMA based on the quadratic constraint, which improves the output performance. The quadratic constraint on the weight can provide excellent robustness to signal steering vector mismatches and to random perturbations in sensor parameters...
We present a microfluidic polymer cantilever array device integrating on-chip temperature control for label-free, temperature-dependent characterization of ligand-protein binding. The microfluidic device features a parylene microcantilever array within a microchamber formed by a PDMS spacer layer and a glass slide including a patterned ITO temperature sensor. The temperature is accurately controlled...
Crypton is a block cipher submitted as a candidate for the advanced encryption standard (AES). It is very efficient in hardware implementations and was designed by Chae Hoon Lim. In this paper, we construct some distinguishers between 4-round Crypton and a random permutation of the blocks space. By using integral Cryptanalysis and partial sum techniques, the distinguishers are used to attack on 5...
We consider the problem of estimating the central direction of arrival (DOA) of a coherently distributed source. In this paper, the integral steering vector of coherently distributed source is deduced to be a Schur-Hadamard product comprising point source steering vector and a real vector. And then a blind estimator based on second order statistics is proposed to estimate the central DOA without adopting...
In practical problems, the constrained least square constant modulus algorithm (LSCMA) can suffer significant performance degradation in the presence of the slight mismatches between the actual and presumed array responses to the desired signal. In this paper, a novel robust constrained LSCMA is proposed based on explicit modeling of uncertainties in the desired signal array response. The proposed...
We consider the problem of estimating the central direction of arrival (DOA) of multiple coherently distributed sources. This problem is encountered due to the presence of local scatters in the vicinity of a transmitter or due to signals propagating through a random inhomogeneous medium. Since the integral steering vector of coherently distributed source can be deduced to be a Schur-Hadamard product...
Now medical imaging processing technology is a very hot subject. The digital image processing in spectral imaging technology field is one of the incarnations. The article is base on the experiment of fresh samples of bone cancer in adults. By using spectral similarity mapping and correlation algorithm, we get two different images. The result of correlation algorithm is fast, but unclear, while the...
We consider the problem of estimating the parameters-the central direction of arrival (DOA) and angular spread of a coherently distributed source. This problem is encountered due to the presence of local scatterers in the vicinity of a transmitter or due to signals propagating through a random inhomogeneous medium. Since the computational complexity of the parameter estimation is normally highly demanding,...
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