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In this paper, we illustrate how to use simple LDPC codes to build a GPRAM prototype. We overview the GPRAM system and design principles. We then map the design into a problem. We demonstrate an experimental solution. We further introduce a switch function in the system, which will allow us to perform revision in code structures in GPRAM prototype in future. In this study many interesting features...
In this paper, we continue our journey on how to use simple LDPC codes to build a GPRAM prototype. We examine a switch function in the system which will allow us to perform revision in code structures in the GPRAM prototype in future. In this study we focus on how to improve learning for three-state systems; how to learn using perfect codewords; and finally how to perform progressive learning methods...
Integrating optically, electrically, and thermo-mechanically disparate materials into a fiber drawn from a preform is enabling fiber devices with unique functionalities. We present two examples: directionality-controlled radial fiber lasers and all-in-fiber chemical sensors.
We demonstrate a high-throughput method for synthesizing zinc selenide (ZnSe) in situ during fiber drawing. Direct atomic-level compositional and structural analysis of the produced compound is performed, and a ZnSe-based in-fiber heterojunction device is achieved.
Optometry is an essential health care profession that has existed for many centuries and is still evolving. However, the training approaches for optometrists are not yet on par with the latest technological evolution. The traditional supervisor-student training mode could not provide good immersion and repeatability, while most existing vision-based computer-assisted simulations provide even worse...
Constrained local models (CLMs) recently exhibit superior generic performance in facial feature localization over leading holistic gradient descent methods, such as active appearance models (AAMs). However, due to representing shape variations with a single deterministic PCA (Principal Component Analysis) model, canonical CLMs may suffer inherent drawbacks when applied to faces with large non-rigid...
This paper presents a hierarchical decomposition model for frontal face caricature generation. The proposed model represents facial features within the framework of a three-layer parsing tree over multiple resolutions. In the face, facial component and texture structure layers of the model, the CLM (Constrained Local Models) based facial feature localization method, the multiple SVM (Support Vector...
Training of optometrists is traditionally achieved under close supervision of peers and superiors. With the rapid advancement in technology, medical procedures are performed more efficiently and effectively, resulting in faster recovery times and less trauma to the patient. However, application of this technology has made it difficult to effectively demonstrate and teach these manual skills as the...
Computer haptics has so far been performed on a personal computer (PC). Off the shelf haptic devices provide only PC interfaces and software drivers for control and communication. The new wave of high capable tablet PCs and high end smart phones introduced new platforms for haptic applications. The major problem was to communicate wirelessly to provide user convenience and support mobility which is...
A powerful image editing system called OVIE is described, which provides fast and accurate creation, composition, rendering and other manipulation of image contents. Flexibility and convenience of the system are achieved by including two modules: image decomposition and image vectorization to understand and represent an image respectively. To understand an image comprehensively, we propose to integrate...
Using lessons learned from error control coding, and multiple areas of life science, we propose a general purpose representation and association machine (GPRAM). GPRAM uses a versatile approach with hierarchical representation and association structures, each with different degrees of vagueness, over-completeness, and deliberate variation. GPRAM machines use vague measurements to do a quick and rough...
In this paper we show how to optimize QAM signal constellation which minimizes bit error probabilities with nonuniform sources on AWGN and Rayleigh fading channel. The optimal signal constellation is not equally spaced. We show that the optimal system has a lower error probability than a conventional system, i.e., a system with source coding, equiprobable symbols, and equal space constellation. In...
Using lessons learned from error control coding, and multiple areas of life science, we propose a general purpose representation and association machine (GPRAM). In this part of paper, we illustrate our methodology, four principles, and our understanding of intelligence. We then introduce hierarchical structure and reasons to be vagueness, overcompleteness, and deliberate variation. After that, we...
Modern telecommunication and error control coding are largely designed to handle equiprobable symbols. In this paper, we present challenges and several results in designing codes and iterative decoding when we extend to non-equiprobable symbols, which may lead to better understanding of bio-signal processing in future. We first demonstrate the limitation of XOR operation in dealing with non-equiprobable...
We report on the realization of a frequency-tunable all-in-fiber liquid crystal cell with built in electrodes that is demonstrated to modulate light incident transverse to its axis.
Polygon and point based models dominate in virtual reality. These models also affect haptic rendering algorithms which are often based on collision with polygons. We use mathematical functions to define and implement geometry (curves, surfaces and solid objects), visual appearance (3D colors and geometric textures) and various tangible physical properties (elasticity, friction, viscosity, and force...
A novel over-exposure image correction algorithm combining synthesized texture information in over-exposed regions is presented. In this algorithm, intensity image is decomposed into structure and detail layers by weighted least squares method. Modified exemplar-based texture synthesis method is applied to the detail layer in order to synthesize texture details in over-exposed regions. The synthesized...
Transmissions over wireless channels suffer from multi-path fading and co-channel interference. This paper is based on the performance improving of CDMA system by collaboration diversity, through deducing the outage probability on both symmetrical and asymmetrical systems ??CI make a conclusion that outage probability is obviously improved. This article focuses on outage probability in decoding relay...
IPSec technology is important in computer network security, it is an IP layer security frame agreement formulated by IETF. This paper introduces the principle and the related concept, and discusses the actual application scenes.
Location-based services are widely used in the Internet services. The method of location cloaking is used to effectively protect the user's location privacy. The current cloaking algorithm does not take into account the regional characteristics, such as population density, popularity level and so on, based on which an attacker can often infer user's exact location from their cloaking area. In this...
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