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For a multi-die IC, the chip-level clock synchronization problem that aims to establish a global clock signal across multiple functional dies is harder to achieve than its single-die counterpart. In this work, we investigate a process resilient solution for this problem by incorporating Delay-Locked Loops (DLLs). The basic idea is to insert a DLL (which can be generated by a DLL compiler) in each...
Identification of inland waterway ‘black spot’ is an important means for maritime essential safety management. This paper presents an Identification model of inland waterway ‘black spot’ based on MEA-BP neural network algorithm. The accident information is obtained and assigned by the MEA-BP neural network algorithm. The uncertainty of navigation condition in inland waterway channel is also considered...
This paper proposes a resilient Time-to-Digital Converter (TDC) that lends itself to cell-based design automation. We adopt a shrinking-based architecture with a number of distinctive techniques. First of all, a specialized on-chip re-calibration scheme is developed so that the real-time transfer function of the TDC in silicon (which maps an input pulse-width to its corresponding output code) can...
During a multi-die integration process, a number of known good dies are stitched together by die-to-die interconnects composed of TSVs (Through Silicon Vias) and/or die-to-die interconnecting wires. These die-to-die interconnects are not only used for signal transmission, but also for clock and power distribution. In this talk, we review some potential test methods that can be used for these two types...
An 2.5D IC could be composed of a number of functional dies operating in locked steps defined by a global clock signal. However, the clock network design across multiple dies may not be trivial as the die-to-die interconnects used for relaying the clock signal from a source die to the other receiver dies could be unpredictable in their delays in real silicon. In this work, we propose a characterization-and-tuning...
In today's multi-die ICs, the die-to-die interconnects are often complicated and susceptible to various kinds of manufacturing defects and stress-induced performance degradation in the field. This phenomenon has prompted a need to perform online monitoring of the signal integrity over the die-to-die interconnects for reliability critical applications. In this work, we present a slack-time binning...
Chip-to-chip interconnects can be traditionally tested for stuck-at faults and hard bridging faults via the boundary scan test standard. However, such a traditional test method may not be adequate for 3D-ICs, in which die-to-die interconnects could operate at a very high speed with an end-to-end delay of only a few hundred of picoseconds. Parametric defects (such as small delay faults, resistive open/bridging...
Digital Delay-Locked Loops (DLLs) have been widely used in today's ICs for all kinds of timing control. Even though a digital DLL circuit is much easier to design than its analog counterparts, our prior experience shows that weeks of efforts, if not months, could still be wasted in order to find a process resilient configuration for a specific DLL requirement. Thus, we propose in this work a cell-based...
In order to effectively remove heat load created by oil system, hydraulic system, cabin and airborne electrical equipment on the aircraft, fuel is selected to be heat sink. Using fuel as heat sink results in the rise of fuel temperature, so fuel is required to dissipate heat through tank walls and exchange heat with air by air-fuel heat exchanger to ensure that the heat-absorbing capacity of fuel...
For the problem of poor real-time performance in single machine simulation as a result of complex model, based on the characteristics of reflective memory network transmission, this paper proposes a distributed simulation system of on-orbit rescue of spatial non-cooperative targets. The system possesses the function to simulate on-orbit states of different stages, such as the process of approaching,...
Cataclysmic variable (CV) stars are binary stars that consist of two components: a white dwarf primary, and a mass transferring secondary. Due to the relative faint of cataclysmic variable and a large number of irregular changes, it is not easy to get valuable data and important research results on observation. But they have significant meaning on the subsequent research of these spectra. In general,...
In a modern multi-core SoC, the Built-In Speed Grading (BISG) of each logic core is often necessary in order to ensure an adequate operating margin for accommodating all kinds of variation (e.g., PVT variation), and to guide the dynamic VDD tuning process as well. In general, a speed grading method for a logic core can be performed by repeating a specific delay test session, (e.g., built-in self-test...
In this paper, an efficient two dimensional finite-difference time-domain (FDTD) method with weighted Laguerre polynomials (WLPs) is proposed to model electromagnetic wave propagation in thin graphene sheets accurately. The proposed method incorporates the intraband terms of the surface conductivity of graphene and introduces an auxiliary differential equation (ADE) technique to establish the relationship...
OFDMA is a multiple access based on orthogonal frequency division multiplexing of multi-users. As a method, conventional iterative water-filling algorithm satisfies the convergent condition by constantly closing to the optimum value. Therefore, the application of the algorithm is limited for the huge computations and complex algorithm. Aiming at solving the problem, a modified water-filling algorithm...
Biomedical image processing that offers computer-aided diagnosis is much more popular due to the availability of high quality and large quantity of medical data. Our well-developed biomedical image computing system, which automatically extracts and segments the nucleus and cytoplasm of cell in medical images, is no doubt following this idea. Nonetheless, even though previous system provide good algorithmic...
A clock network in a 3D-IC is not only difficult to design, but also challenging to test. For high-performance designs with a rigorous clock-skew requirement, studies have shown that small defects in a clock tree network could lead to unexpected failures in the field and thus need to be identified during the manufacturing test. In this paper, we present a novel test method to determine if a clock...
In the preceding chapters we have presented several supervised and unsupervised algorithms using kernel fusion to combine multi-source and multi-representation of data. In this chapter we will investigate a different unsupervised learning problem Canonical Correlation Analysis (CCA), and its extension in kernel fusion techniques. The goal of CCA (taking two data sets for example) is to identify the...
Clustering is a fundamental problem in unsupervised learning and a number of different algorithms and methods have emerged over the years. k-means and spectral clustering are two popular methods for clustering analysis. k-means (KM) is proposed to cluster attribute-based data into k numbers of clusters with the minimal distortion [4, 8]. Another well known method, spectral clustering (SC) [18, 20],...
Text mining helps biologists to collect disease-gene associations automatically from large volumes of biological literature. During the past ten years, there was a surge of interests in automatic exploration of the biomedical literature, ranging from the modest approach of annotating and extracting keywords from text to more ambitious attempts such as Natural Language Processing, text-mining based...
For real matrices and vectors, given a positive definite matrix Q and a nonzero vector w, a Rayleigh quotient (also known as Rayleigh-Ritz ratio) is defined as $$ \rho =\rho( w;Q) = \frac{ w^T Q w}{ w^T w}. $$ It was originally proposed in the theorem to approximate eigenvalues of a Hermitian matrix.
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