Role assignment is a critical task in role-based collaboration. It has three steps, i.e., agent evaluation, group role assignment, and transfer, where time-consuming process. This paper clarifies the problem (GRAP), describes general (GAP), converts GRAP to GAP, proposes an efficient algorithm based on Kuhn-Munkres (K-M) algorithm, conducts numerical experiments, analyzes solutions' performances. The results show that proposed significantly improves exhaustive search. major contributions of...

Ideally, the inner (the upper or lower arm) current of a modular multilevel converter (MMC) is ideally assumed to be sum dc component and an ac fundamental frequency. However, as flows through submodule (SM) capacitors, capacitor voltages fluctuate with time. Consequently, usually distorted peak/RMS value it increased compared theoretical value. The currents will increase power losses may threaten safe operation devices capacitors. This paper proposes closed-loop method for suppression in...

In this paper, an improved pulse width modulation (PWM) method for chopper-cell (or half-bridge)based modular multilevel converters (MMCs) is proposed. This can generate output voltage with maximally 2N+1 (where N the number of submodules in upper or lower arm MMC) levels, which as great that carrier-phase-shifted PWM (CPSPWM) method. However, no phase-shifted carrier needed. Compared existing submodule unified modulated (SUPWM) method, level almost doubled and height step staircase reduced...

The ever-increasing popularity of recommendation systems allows users to find appropriate services without excessive effort. However, due the unstable and complex network environment, historical behavior data are quite sparse in most cases. inherent drawbacks render preference prediction infeasible for cold-start have become a crucial issue be resolved systems. To deal with problems, we first present Trust-based Collaborative Filtering (TbCF) algorithm perform basic rating manner consistent...

With the widespread application of service-oriented architecture (SOA), a flood similarly functioning services have been deployed online. How to recommend users meet their individual needs becomes key issue in service recommendation. In recent years, methods based on collaborative filtering (CF) widely proposed for However, traditional CF typically exploits only low-dimensional and linear interactions between is challenged by problem data sparsity real world. To address these issues,...

Computer-supported cooperative work (CSCW) systems are computer-based tools that support the collaborative activities of human users. They should not only virtual face-to-face environments but also improve collaboration by providing more mechanisms to overcome drawbacks usual collaboration. Introducing roles into CSCW is important in achieving this. This paper's contributions include establishing requirements for a role-based collaboration, presenting concept, requirements, and principles...

In this paper, the influence of one-sample delay for sampling and computation in digital control on bandwidth inner current loop a 400-Hz ground power unit (GPU) is analyzed first. The results show that it difficult even impossible high-power GPUs to maintain low total harmonic distortion content output voltage with conventional proportional-integral-based double-loop control. To improve performance, resonant controllers parallel structure which are widely used active filters applied...

In the last decade, many methods for control of three-phase boost-type pulsewidth modulation (PWM) rectifier under unbalanced input voltage conditions have been studied and presented. These use sequential components voltages, pole currents to analyze instantaneous powers, which dual (positive-sequence negative-sequence rotating) frame is most common structure. Anyway, this paper analyzes powers PWM in two-phase stationary frame. Based on analysis, input-power-control,...

As a primary defense technique, intrusion detection becomes more and significant since the security of networks is one most critical issues in world. We present an adaptive collaboration method to improve safety network. A self-adaptive collaborative model built by applying Environmentsclasses, agents, roles, groups, objects (E-CARGO) model. The objects, groups are designed using decision trees (DTs) support vector machines (SVMs), scheduling mechanisms set up. KDD CUP 1999 data used verify...

Role assignment is a critical element in the role-based collaboration process. There are many constraints to be considered when undertaking this task. This paper formalizes group role problem faced with constraint of conflicting agents, verifies benefits solving problem, proves that such subproblem extended integer linear programming (x-ILP) proposes practical approach solution, and assures performance based on results experiments. The contributions include: 1) formalization proposed...

Currently, Edge computing (EC) paradigm is adopted to provision the low-latency resources for massive real-time services in Internet of vehicles (IoV). To alleviate QoE (Quality Experience) degradation vehicular users due uncertainties (e.g., resource conflicts and communicating interruption), software-defined network (SDN) involved EC-enabled IoV manage cooperative operation distributed edge nodes (ENs). However, increasing privacy leakage service offloading causes disclosure sensitive...

Many-to-Many (M-M) role transfers are generalized problems that encountered in collaboration. Exhaustive-search-based algorithms too computationally intensive. This paper introduces the Kuhn-Munkres (or Hungarian) algorithm for general assignment (GAPs) and proposes a new efficient to solve M-M transfer by converting them GAPs. The experiments results validate proposed algorithms.

In this paper, a power electronic transformer (PET) topology for distribution grid is presented based on modular multilevel converter (MMC). The of three-phase type and have two dc voltage terminals, i.e. the high-voltage terminal low-voltage terminal. So, it can be connected directly to direct current (HVDC) systems renewable energy simultaneously. This feature makes possible perform as an "energy router" in smart grids. What more important, proposed PET substantially reduce (by 44.4%...

Collaboration is complex. To solve a problem occurring in collaboration, using computers, we must first define and specify the problem. This paper presents challenging called group role assignment with cooperation conflict factors (GRACCFs). problem's solution aims at creating high-performance by consideration of conflicts between agents. The contribution this formalization proposed problem, confirmation complexity practical that uses IBM ILOG CPLEX optimization package (ILOG), verification...

Role-based approaches are emerging technologies in information system design and implementation. Roles have been acknowledged applied many fields for years. Considering their increasing importance applications the development of various systems, this paper intends to: 1) survey literature relevant to role mechanisms role-based systems different point out motivations contributions; 2) classify roles such contexts as modeling, designing, management, collaboration; 3) identify commonalities...

Cognitive informatics is a transdisciplinary enquiry of computer science, information sciences, cognitive and intelligence science that investigates the internal processing mechanisms processes brain natural intelligence, as well their engineering applications in computing. computing an emerging paradigm intelligent methodologies systems based on implements computational by autonomous inferences perceptions mimicking brain. This article presents set collective perspectives computing,...

Intelligent adaptive interfaces (IAIs) are emerging technologies that promise opportunities for enhancing performance in complex sociotechnical environments, such as multiple uninhabited aerial vehicle (UAV) control. However, a lack of established design guidelines advanced makes many designs costly and ineffective. In this paper, generic conceptual framework developing IAIs is proposed to guide interface design. The integrates user-centered approach with the concept proactive use...

Role assignment is a critical element in the role-based collaboration process. There are many different requirements to be considered when undertaking this task. This correspondence paper formalizes group multirole (GMRA) problem; proves necessary and sufficient condition for problem have feasible solution, provides an improved IBM ILOG CPLEX optimization package verifies proposed solution with experiments. The contributions of include: 1) formalization important engineering problem, i.e.,...

Role-based collaboration (RBC) is an emerging computational methodology that uses roles as the primary underlying mechanism to facilitate activities. It consists of a set concepts, principles, models, and algorithms. RBC offers benefits challenges may not be revealed with traditional methodologies systems. Related research continues process improvement development, evaluation, management, performance computer-based This article provides concise introduction its model, Environments-Classes,...

Self-service spatiotemporal crowdsourcing (SSC), a booming variant of (SC), emerges because the vigorous development mobile Internet. Unlike conventional SCs, particularity self-service in SSC may lead to unfinished tasks at end entire assignment process, making one-time scheme ineffective. is essentially an adaptive collaboration (AC) problem that requires dynamic strategy for higher task completion rate. This article tackles this issue by establishing quasi group role (QGRA) based on...

Edge-cloud collaboration fully utilizes the advantages of sufficient computing resources in cloud and low latency edge better meets needs various Internet Things (IoT) application scenarios. An important research challenge for edge-cloud is how to offload tasks quickly efficiently, taking into account different task characteristics, resource capabilities, optimization objectives. To address above challenge, we propose a fast efficient offloading approach systems that can achieve near-optimal...

Outpatient scheduling is considered as a complex problem. Efficient solutions to this problem are required by many health care facilities. This paper proposes an efficient approach outpatient specifying bidding method and converting it group role assignment The proposed validated conducting simulations experiments with randomly generated patient requests for available time slots. major contribution of making automatic practical. exciting result due the consideration collaborative activity...