In this paper, we evaluate the performance of two candidate formulations for distributed motion planning of robot collectives within an Artificial Potential Field (APF) framework. We exploit the parallel between the f...
详细信息
To restrain the error of inertial navigation system (INS), gravity-aided navigation system is introduced. The principle of gravity-aided navigation system is expatiated. By using Kalman Filter, error correcting of ine...
详细信息
Nowadays robots are becoming more ubiquitous, and focus is increasingly put on the variety of tasks they can perform autonomously. However, due to the dynamics of the environment or the robot itself, sometimes the mod...
详细信息
A typical concern in robotics is to assess if it is possible to keep a robot inside a set of safe states, e.g., an autonomous car that must stay on the road. That is closely tied with the problem of computing the viab...
详细信息
In this paper, a multivariate fault prognosis approach based on statistical process monitoring (SPM) methods and time series prediction for turbine machine was proposed. A principal component analysis (PCA) model usin...
详细信息
An Extreme Learning Machine (ELM)-a neural network with fixed hidden layer and adjustable output weights is able to solve complicated regression (approximation) problems, but the standard selection of input weights an...
详细信息
An Extreme Learning Machine (ELM)-a neural network with fixed hidden layer and adjustable output weights is able to solve complicated regression (approximation) problems, but the standard selection of input weights and biases may lead to ill-conditioning of the output weights calculation and result in high values of the output weights. Two modifications of standard ELM are discussed: deterministic generation of hidden nodes parameters and modifications of activation functions to improve numerical properties of the algorithm.
Cervical cancer is a female-specific malignancy that poses a substantial threat worldwide, especially in less privileged and underdeveloped regions. Despite continuous progress and advances in medical science research...
详细信息
Production system modeling refers to the process of constructing valid and high-fidelity mathematical models that are capable of capturing the behavior of job flow in the manufacturing systems. During the modeling pro...
详细信息
ISBN:
(纸本)9781665418737
Production system modeling refers to the process of constructing valid and high-fidelity mathematical models that are capable of capturing the behavior of job flow in the manufacturing systems. During the modeling process, model parameter identification is the most critical step. This step, however, often involves a significant amount of complex and non-standardized work. To tackle this problem, we propose to reversely compute the production system model parameters based on standard manufacturing system performance metrics. In this paper, we consider a two-machine production line model, in which the machines follow the exponential reliability model and have identical processing speed, and formulate a constrained optimization problem with the objective of finding the optimal machine parameters which can fit the system performance metrics the best. To solve this problem, barrier method with BFGS quasi-Newton algorithm and cyclic coordinate descent method with proximal point update are developed. The accuracy of these two methods in estimating machine parameters and performance metrics are computed and compared through extensive numerical experiments. Although barrier method is much more efficient in terms of computation time, the risk of getting trapped in local optima exists due to the lack of convexity. On the other hand, the numerical experiments demonstrate that the coordinate descent method reaches the global optimal solution for all the cases. Therefore, an ensemble strategy is recommended to ensure a high accuracy in parameter estimation with acceptable computation time.
Localization technology is one of the most important research areas in wireless sensor networks. This paper proposes a set of RF modulation methods to improve the accuracy of localization by utilizing the Receive Sign...
详细信息
The article considers the problem of controlled load lifting using a group of active exoskeletons equipped with lifting mechanisms. The group use of several exoskeletons allows lifting, holding and carrying loads of g...
详细信息
暂无评论