We give two generalizations of Tarski’s fixpoint theorem in the setting of residuated lattices and use them to establish van Emdem-Kowalski’s least fixpoint semantics for residuated lattice-valued logic programs.
We give two generalizations of Tarski’s fixpoint theorem in the setting of residuated lattices and use them to establish van Emdem-Kowalski’s least fixpoint semantics for residuated lattice-valued logic programs.
To celebrate the 20th anniversary of the first Bioengineering Department in Italy at the Politecnico di Milano, a number of articles in this issue highlight the department's achievements. The department was eventu...
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To celebrate the 20th anniversary of the first Bioengineering Department in Italy at the Politecnico di Milano, a number of articles in this issue highlight the department's achievements. The department was eventually founded in 1990 after many years of research and didactic activity in the area that officially began in 1969 when the first teaching course, called biological electronics, was offered in the electronic engineering specialization.
Metamaterials can enhance a local electric field for molecular sensing. However, the difficulty in specifically recognizing target molecules and integrating multiple functionalities restricts their development. Here, ...
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Digital Transformation is a global phenomenon, capturing the attention in every industry and spurring major investment. However, digital transformation is not a single objective, but a multi-faceted approach depending...
Digital Transformation is a global phenomenon, capturing the attention in every industry and spurring major investment. However, digital transformation is not a single objective, but a multi-faceted approach depending on specific industrial goals and their digital maturity. Digital transformation is the way of change from a monolithic business approach to fully digitalized business strategies, resulting in digital transformation a key economic objective and a major success factor of a comprehensive corporate transformation. In addition to digital technologies, processes, and procedures, and aside from that also skilled employees required keeping pace in reacting quickly to changes in order to adapt to necessary needs and opportunities in the markets, to drive growth and innovation. In the first of the four industrial evolutions, steam power was a disruptive technology that has changed the working capabilities. In the second it was the assembly line and in the third the computer. Today, in the fourth industrial evolution, everything is digital. intelligent digital technologies such as Artificial Intelligence (AI), Machine Learning (ML), Internet of Things (IoT), Big Data and Analytics, Automated Robots, and others are accelerating a profound transformation in the way industries work and do business. However, beside digital transformation a second transformation narrative occur, which refers to the circularity of business models, based on the foundation, that sustainability, and specifically circularity is a path to an environmentally friendly production and profitability. This business model is not yet widespread everywhere, but economic, social, and technological changes are enabling circularity be enticing. Given this fact, circular economy makes sense not only from an environmental perspective, it’s also likely the way forward to the central goal of waste reduction in production, and also initiating a prosperous environmentally friendly business strategy. In this
Quantum information theory is a new interdisciplinary research field related to quantum mechanics, computer science, information theory, and applied mathematics. It provides completely new paradigms to do information ...
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Quantum information theory is a new interdisciplinary research field related to quantum mechanics, computer science, information theory, and applied mathematics. It provides completely new paradigms to do information processing tasks by employing the principles of quantum mechanics. In this review, we first survey some of the significant advances in quantum information theory in the last twenty years. We then focus mainly on two special subjects: discrimination of quantum objects and transformations between entanglements. More specifically, we first discuss discrimination of quantum states and quantum apparatus in both global and local settings. Secondly, we present systematical characterizations and equivalence relations of several interesting entanglement transformation phenomena, namely entanglement catalysis, multiple-copy entanglement transformation, and partial entanglement recovery.
Drogue recognition and 3D locating is a key problem during the docking phase of the autonomous aerial refueling (AAR). To solve this problem, a novel and effective method based on monocular vision is presented in th...
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Drogue recognition and 3D locating is a key problem during the docking phase of the autonomous aerial refueling (AAR). To solve this problem, a novel and effective method based on monocular vision is presented in this paper. Firstly, by employing computer vision with red-ring-shape feature, a drogue detection and recognition algorithm is proposed to guarantee safety and ensure the robustness to the drogue diversity and the changes in environmental condi- tions, without using a set of infrared light emitting diodes (LEDs) on the parachute part of the dro- gue. Secondly, considering camera lens distortion, a monocular vision measurement algorithm for drogue 3D locating is designed to ensure the accuracy and real-time performance of the system, with the drogue attitude provided. Finally, experiments are conducted to demonstrate the effective- ness of the proposed method. Experimental results show the performances of the entire system in contrast with other methods, which validates that the proposed method can recognize and locate the drogue three dimensionally, rapidly and precisely.
A dual laser radar based path planning method for mobile robot in general outdoor road environment is proposed. Firstly, the point-wise sequence and target library of the global optimal path are generated based on alg...
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A dual laser radar based path planning method for mobile robot in general outdoor road environment is proposed. Firstly, the point-wise sequence and target library of the global optimal path are generated based on algorithm A*. Secondly, the local target information and the perceptive information from dual laser radar are combined, and the different field information from both horizontal and aslant fixed laser radars is fused. Finally, the optimal driving angle is computed by the improved angle potential field(APF)algorithm. The practical experiment results validate the robustness and timeliness of the proposed approach.
This paper investigates a distributed heterogeneous hybrid blocking flow-shop scheduling problem(DHHBFSP) designed to minimize the total tardiness and total energy consumption simultaneously,and proposes an improved p...
This paper investigates a distributed heterogeneous hybrid blocking flow-shop scheduling problem(DHHBFSP) designed to minimize the total tardiness and total energy consumption simultaneously,and proposes an improved proximal policy optimization(IPPO) method to make real-time decisions for the DHHBFSP.A multi-objective Markov decision process is modeled for the DHHBFSP,where the reward function is represented by a vector with dynamic weights instead of the common objectiverelated scalar value.A factory agent(FA) is formulated for each factory to select unscheduled jobs and is trained by the proposed IPPO to improve the decision *** FAs work asynchronously to allocate jobs that arrive randomly at the shop.A two-stage training strategy is introduced in the IPPO,which learns from both single-and dual-policy data for better data *** proposed IPPO is tested on randomly generated instances and compared with variants of the basic proximal policy optimization(PPO),dispatch rules,multi-objective metaheuristics,and multi-agent reinforcement learning *** experimental results suggest that the proposed strategies offer significant improvements to the basic PPO,and the proposed IPPO outperforms the state-of-the-art scheduling methods in both convergence and solution quality.
Mutual information (MI) is a basic concept in information theory. Therefore, estimates of the MI are fundamentally important in most information theory applications. This paper provides a new way of understanding an...
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Mutual information (MI) is a basic concept in information theory. Therefore, estimates of the MI are fundamentally important in most information theory applications. This paper provides a new way of understanding and estimating the MI using the copula function. First, the entropy of the copula, named the copula entropy, is defined as a measure of the dependence uncertainty represented by the copula function and then the MI is shown to be equivalent to the negative copula entropy. With this equivalence, the MI can be estimated by first estimating the empirical copula and then estimating the entropy of the empirical copula. Thus, the MI estimate is an estimation of the entropy, which reduces the complexity and computational requirements. Tests show that the method is more effective than the traditional method.
Fast changing knowledge on the Internet can be acquired more efficiently with the help of automatic document summarization and updating techniques. This paper describes a novel approach for multi-document update summa...
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Fast changing knowledge on the Internet can be acquired more efficiently with the help of automatic document summarization and updating techniques. This paper describes a novel approach for multi-document update summarization. The best summary is defined to be the one which has the minimum information distance to the entire document set. The best update summary has the minimum conditional information distance to a document cluster given that a prior document cluster has already been read. Experiments on the DUC/TAC 2007 to 2009 datasets (http://***/, http://***/tac/) have proved that our method closely correlates with the human summaries and outperforms other programs such as LexRank in many categories under the ROUGE evaluation criterion.
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