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Collision avoidance (CA) for an Unmanned Surface Vehicle (USV) is a key technology for autonomy especially in a complex environment. To decide a suitable steering occasion to maneuver for the CA of an USV may be very helpful in some applications such as the long-term monitoring task in the environment with various obstacles. In this paper, a steering occasion strategy is designed. Firstly, a feasible...
Long Term Evolution (LTE) carrier aggregation with 5GHz unlicensed national informational infrastructure (UNII) band has been suggested by the industry as a good solution to handle the rapidly increasing amount of data traffic. To provide fair coexistence of LTE-licensed assisted access (LTE-LAA) and Wi-Fi on 5 GHz, several coexistence mechanisms have already been proposed. Nevertheless, as one of...
Aiming at the problem of UAV automatic decision making in air combat, an algorithm based on Goal Graph Plan is proposed to solve the knowledge modeling in tactical decision making. The heuristic knowledge in the field of air combat rules was introduced to help UAV make the reasonable maneuvering decision. The structure of UAV autonomous decision making based on the plan goal graph is designed according...
Lot-sizing problem is one of the most important issues in the production planning area and a large number of related research works can be found in literature. However, most of the works only consider the problem in a steady environment, without taking into account the time-varying production conditions that may change timely in some industrial applications. In this paper, we present the time-varying...
Channel map has been widely used as an effective tool in network planning and deployment. However, there is a lack of mathematical formulation of the channel map as a tool for multiple-input multiple-output (MIMO) networks planning. In this work, we define and construct a MIMO channel map based on the extension of a mathematical formulation for the conventional single antenna channel map. We demonstrate...
Aiming at the problem that the consistency between load capacity and the actual traffic volume, the road grade analysis in urban traffic network. Propose the improved GROCC algorithm based on the traditional Dijkstra algorithm. It is a global path planning method based on real-time traffic information. In this algorithm, the parameter, the number of recommended times are used as an important factor...
Path loss modelling and prediction is essential in indoor network planning. To find an efficient and accurate path loss model benefits the network planning and optimisation process. In this work, we propose an efficient multipath empirical path loss prediction model based on an intelligent ray launching algorithm for 60GHz indoor channel. The comparison between the simulation result and measurement...
In this paper, we propose a planning mechanism based on telecom user behavior to choose locations of telecom operator's service halls. Telecom service hall network consists of service requirements nodes (RNs) and telecom service hall sites (TSs). Telecom service hall location selection problem mainly focuses on choosing locations of TSs from RNs. With analysis of base station data, we formulate a...
Reliability is one of the most concerned issues in wireless communications for smart grid, especially in the home area network(HAN) where the smart meter data are collected. In this paper, we model the HAN as a wireless mesh network that deploys cooperative transmissions for improving link reliability. We then define a new reliability performance metric that depends not only on the channel model but...
We investigate the problem of gradual migration from fixed grid to flexible grid in optical networks by designing heuristics to selectively upgrade WSSs on ROADMs. We evaluate the performance of our scheme under different traffic profiles.
This paper proposes an optimization model of multi-inventory matching and order planning of the iron-steel factories based on the mixed strategy of MTO-MTS. The model considers the multiple objectives, i.e., the total cost of earliness/tardiness penalty, tardiness penalty in delivery time window, production penalty; inventory matching, order cancellation penalty and machine capacity penalty. An improved...
Sambot is a module robot system, with the advantages of self-assembly. A target robotic configuration can be organized by a group of Sambots. A novel motion planning method for Sambot configuration using model checking is presented in this paper. This hierarchical method contains two layers. The abstract logic layer is responsible for the discrete planning of Sambots configuration. The robot and the...
Motion planning is an important problem with many applications in robotics. In this paper, we focus on motion planning with rectangular obstacles parallel to the X, Y or Z axis. We formulate motion planning using Satisfiability Modulo Theories (SMT) and use SMT solvers to find a feasible path from the source to the goal. Our formulation decompose the robotic path into N path segments where the two...
Possessing two manipulators heightens the ability of dual-arm robots (DAR) to conduct complex tasks, while raising hazard that the two manipulators might collide with each other or with other objects. DARs are usually equipped with a collision-free motion planning algorithms (CFMPA) to prevent the two manipulators from colliding. The CFMPA searches the motion paths of robot manipulators, which are...
Software-as-a-Service (SaaS) is a brand new selling strategy for enterprise software developers and it spreads quickly in the recent years. In this paper we develop a dynamic model with state-dependent demand and quality decisions to describe the revenue and cost structures for the firm who is the software service provider. We show that there exists a unique optimal strategy for the service provider...
In the late 1980s, the booming Internet technology gave birth to a new business model -- e-commerce. Initially e-commerce met the consumer demand of the customers efficiently with its network of information flow. However, with the continuous development of people's consumption concept, the primary online marketing e-commerce has been unable to realize its initial advantage. Customer demand structure...
In-building Distributed Antenna System (IB-DAS) has been proved to be one of the most efficient methods to provide sufficient coverage and capacity for indoor users. The target of a successful IB-DAS deployment is to guarantee the coverage as well as the capacity of the in-building areas with minimum deployment cost. We consider the optimal deployment of the IB-DAS based on passive DAS in this paper...
Small cells are becoming essential to offer a promising solution for dramatic mobile traffic growth in future mobile networks. Especially, massive enterprise femtocells are expected to provide high capacity to fulfill high data demands in buildings in order to offload indoor traffic from outdoor macro cells in that over 80% of mobile data traffic is generated indoors. However, as one of the major...
In the context of heterogeneous networks, femtocells are very promising. In order to properly simulate their behavior and their impact on the macrocell layer, it is necessary to be able to simulate the radio coverage of femtocells. Hence ParFlow is a possible deterministic model that can be used for such simulation. In this paper two implementations of ParFlow are presented: time domain and frequency...
Scientific analysis of regional tourism resources is an important task of tourism planning. Its spatial distribution has determined the direction of tourism development to a certain extent, thus it is vital to reveal the spatial features of tourism resources by the GIS method, which possesses excellent spatial analysis function. This paper used NNI, mean center, standard distance, and standard deviational...
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