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With the continuous drive towards integrated circuits scaling, efficient performance modeling is becoming more crucial yet, more challenging. In this paper, we propose a novel method of hierarchical performance modeling based on Bayesian co-learning. We exploit the hierarchical structure of a circuit to establish a Bayesian framework where unlabeled data samples are generated to improve modeling accuracy...
In this paper, we study the problem of survivable virtual optical network (VON) mapping against single link failure with shared backup path protection (SBPP) in elastic optical networks. We formulate this problem with an integer linear programming (ILP) model to minimize the resource consumption of both working and backup paths. A different dynamic cost model (DDCM) for each sharable frequency slot...
Efficiently optimizing large-scale, complex analog systems requires to know the performance tradeoffs for various analog circuit blocks. In this paper, we propose a radically new approach for analog performance tradeoff modeling. Our key idea is to broadly search the rich design knowledge from the Internet, and then mathematically encode the knowledge as high-dimensional performance tradeoff curves...
Building energy accounts large amount of the total energy consumption, and smart building energy control leads to high energy efficiency and significant energy savings. A compact and accurate building thermal model is important for designing the efficient energy control system. In this paper, we propose an accurate thermal behavior modeling technique for general and complicated buildings. This new...
We study a quantity-flexibility supply contract between a manufacturer and a retailer in two periods. The retailer can get a low wholesale price within a fixed quantity and adjust the quantity at the end of the first period. The retailer can adjust the order quantities after the first period based on updated inventory status by paying a higher per-unit price for the incremental units or obtaining...
Design against slamming loads is the concern of ship designers from the view point of strength for the safety of bow structures. Model test technique using water entry of free-drop bodies into calm water is applied in this paper to study the hydroelastic impact. One 3D aluminum wedge with dead-rise angle 20 degrees is designed. The stiffened panel on each side of the wedge is made up of 3 longitudinal...
This paper considers multi-degree cyclic multi-hoist scheduling problems without overlapping. Identical parts are produced in tanks for stages with processing time window constraints. The objective of this research is to obtain a schedule that can maximize the throughput of the line at steady state, equivalently minimize the cycle time. There are three kinds of constraints in cyclic hoist scheduling...
Efficient high-dimensional performance modeling of today's complex analog and mixed-signal (AMS) circuits with large-scale process variations is an important yet challenging task. In this paper, we propose a novel performance modeling algorithm that is referred to as Bayesian Model Fusion (BMF). Our key idea is to borrow the simulation data generated from an early stage (e.g., schematic level) to...
The land-atmosphere interaction in the Tibetan Plateau plays an important role in the Asian summer monsoon and the global energy and water cycle. This study presents a method to improve the land surface water and energy fluxes simulation by using a land data assimilation system (LDAS), which merging microwave remote sensing data and GCM output into a land surface model. NCEP reanalysis data is used...
In this study, we establish a numerical model and use computational fluid dynamics (CFD) analysis to measure peak pressure on the surface of filter bag. The numerical results are in good agreement with the experimental data during the pulse cleaning process. Peak pressure on the surface of filter bag, pressure rise rate and maximum reverse acceleration are used as evaluation indicators of bag-cleaning...
The LWR model's proposition has played an important part in the traffic flow study history. In this paper, we advance an extension model from the origin LWR model. The model takes slope and heterogeneous drivers into account according to an increased speed caused by gravity. We separate heterogeneous drivers with different free flow speed on the flat road and take their interaction into consideration...
The problem of cognitive access of channels of primary users by a secondary user is considered. The transmissions of primary users are modeled as independent continuous-time Markovian on-off processes. A secondary cognitive user employs slotted transmissions, and it senses one of the possible channels before transmission. The objective of the cognitive user is to maximize its throughput subject to...
The aggressive scaling of integrated circuit technology results in high-dimensional, strongly-nonlinear performance variability that cannot be efficiently captured by traditional modeling techniques. In this paper, we adapt a novel L0-norm regularization method to address this modeling challenge. Our goal is to solve a large number of (e.g., 104-106) model coefficients from a small set of (e.g., 10...
Close-form solutions for the gain and refractive index of quantum-dot semiconductor optical amplifiers (QD-SOAs) are derived. The basic formulas are derived from rate equations of multiple-states QD-SOAs. The close-form solution for the gain is improved from previous work, and is in good accordance with numerical results when the power of inputted signal is in a larger range. The close-form solution...
When electric field is measured in the bounded-wave EMP simulator experiment, one kind of optical fiber measurement system is often used. At the same time, the effect of optical transmitter on electromagnetic wave distribution is often concerned. In this paper, we assume that the optical transmitter is placed on the working region of the bounded-wave EMP simulator and the Finite-Difference Time-Domain...
The radiative device made of metal sheet is the key part of an EMP simulator with absorbing stuff. In order to extend the effective work space, the radiative device is designed optimised. And the finite-difference time-domain (FDTD) method is used to model electromagnetic field of effective work space of the EMP simulator accurately. From the numerical result, we can see that the optimised radiative...
In this paper, we assume that the bounded-wave simulator is placed on the ground in the experiment. And the finite-difference time-domain (FDTD) method is used to model electromagnetic field at working region. From the numerical result, we can see that the ground has great effect on the electromagnetic wave.
The continuous technology scaling brings about high-dimensional performance variations that cannot be easily captured by the traditional response surface modeling. In this paper we propose a new statistical regression (STAR) technique that applies a novel strategy to address this high dimensionality issue. Unlike most traditional response surface modeling techniques that solve model coefficients from...
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