As more and more real wireless sensor networks (WSN) applications have been tested and deployed recently, the research community realizes that several issues need to be revisited from practical angles. In this paper, we focus on designing a general energy-efficient, load balanced, fault-tolerant, and scalable routing protocol. First, we abstract four fundamental requirements of any practical ro...

For modern systems, wear estimation plays an important role in preventing failure, scheduling maintenance, and improving utility. Wear estimation relies on a series of sensors, measuring the state of the system. In some components, the sensors used to estimate wear may not be fast enough to capture brief transient states that are indicative of wear. For this reason it is beneficial to be capabl...

To make artificial knee joints have lower long-term wear rate, a new method for reformed design of sagittal femoral condylar geometry based on TRIZ (Theory of Inventive Problem Solving) was proposed. Firstly, according to the development history of sagittal femoral condylar geometry and evolution theory of TRIZ, future state of the evolution line of femoral condylar geometry in sagittal plane w...

Previous reports have described the differences in the friction and wear behavior between different zones of human teeth. The objective of this research was to study the friction and wear behavior of human teeth under different wear conditions to extend the understanding of the tooth wear process, as well as to provide a more rational explanation for wear mechanism of teeth. Two typical wear te...

Artificially fabricated surface textures can significantly improve the friction and wear resistance of a tribological contact. Recently, this surface texturing technique has been applied to polymer materials to improve their tribological performance. However, the wear behavior of textured tribo-pairs made of steel and polymer materials has been less thoroughly investigated and is not well under...

wear is a complicated phenomenon caused by the relative movement of two contacting surfaces compressed together by a normal force. prediction of the wear, in most cases, requires various experiments and microstructural characterization of the contacting surfaces. mathematical models based on physical concepts could provide considerable help in understanding the physical behavior and hence the p...

Tool wear regulation highly influences product quality and the safety and productivity of machining processes. Hence, it is one of the most important elements in the supervisory control of machine tools. The development of this type of machine tool adaptive control is practically at its infancy because there are still no industrial solutions concerning robust, reliable, and highly precise conti...

This paper examines methods of assessing the wear resistance of coated and uncoated materials. Test equipment for sliding wear, erosion, impact and dynamic wear tests is discussed. Processes for measuring wear rates are highlighted and a simple procedure for conducting wear tests to simulate industrial wear problems is given. The wear test selected and the wear conditions encountered in real ap...

background: the purpose of this investigation was to compare empirically predictive ability of an artificial neu­ral network with a logistic regression in prediction of low back pain. methods: data from the second national health survey were considered in this investigation. this data in­cludes the information of low back pain and its associated risk factors among iranian people aged 15 years a...