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In opportunistic mobile networks (OppNets), nodes should be in listening state to discover the neighbors for opportunistic message forwarding. While in OppNets, contacts between nodes are sparse, most of nodes' energy is consumed in idle listening state, which highlights the need for energy saving in contact probing. Duty cycle operation can be applied to address this problem. However, it may cause...
Wireless sensor networks are responsible for sensing, gathering and processing the information of the objects in the network coverage area. Basic data fusion technology generally does not provide data privacy protection mechanism, and the privacy protection mechanism in health care, military reconnaissance, smart home and other areas of the application is usually indispensable. In this paper, we consider...
Linear solvers and parallel computing are crucial for developing a new generation reservoir simulator. To acquire satisfied acceleration performance, we study the parallel algorithms of linear solvers with preconditioners on GPUs (Graphics Processing Units). The classical GMRES solver is implemented, and the parallelization of ILU(0) and ILUT preconditioners based on the Restricted Additive Schwarz...
Showing animations on electronic papers for highlighting some important items is always desirable, but none of mature driving methods have been developed. In this paper, a new driving method aiming at reducing ghost images as well as improving the panel reliability is presented. The method has been integrated with the hardware system we developed, and thereby a promising displayed quality on the electronic...
An intelligent system named Laboratory Mobile Robot Transportation System (LMRTS) has been developed for the mobile robotic transportation in laboratory automation. In this paper, a new approach is presented to predict and manage the on-board battery voltages of the mobile robots for optimizing the LMRTS system. The LMRTS can select and optimize the best mobile robotic candidate for a transportation...
A new robotic system which assists surgeons in manipulating the uterus manipulator during total laparoscopic hysterectomy is presented in this paper. The presented robotic system is of four degrees of freedom (DOF) which composed of a 3-DOF robotic uterus manipulator positioner and a 1-DOF motorized uterus manipulator. To ensure safety of the patient, actuated joints of the uterus manipulator are...
To find all extreme points of multimodal functions is called extreme problem, which is a well known difficult issue in optimization fields. Applying the ant colony optimization (ACO) to solve this problem is rarely reported. The method of applying ACO to solve extreme problem is explored in this paper. Experiments show that the method presented in this paper generates solution with high quality, and...
To build Science and Technology Resources Database (STRD) involves many disciplines. The database have many characteristics such as distributivity, isomerism. With the databases and data in the databases increasing, management and interoperability of metadata had become the key point after the metadata standard system of STRD has been established. Based on database theory, XML and Web Services technology,...
This paper introduces the concept of temporal logic of actions (short for TLA), with which we can formally specify the behavior of a service, and compose Web services. The approach is demonstrated by an example. A services composition algorithm is presented.
In order to make the constraint algorithm more efficient, the processing of constraint propagation is analyzed, and parameterized description of the arc consistency propagation depth is represented by using variable domain retraction proportion. And then an arc consistency algorithm is proposed whose propagation degree is controllable, the constraint algorithmpsilas efficiency is studied under different...
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