In this investigation, the acoustical impedance of an internal combustion engine is measured and simulated. The measurements are based on the two microphone transfer function method, which is described in the standard ISO/FDIS 10543-2. The method uses the transfer function between two microphones positioned on a waveguide connected to the impedance to be measured. Some improvements are proposed...

In today’s and in future further evolved wireless standards, such as WiMAX, 3GPP-LTE or LTE-Advanced, receiver terminals have to support numerous operating modes for each protocol [1] as well as sophisticated transmission techniques, especially enhanced MIMO detection and iterative forward error correction (FEC). These two belong to the most computationally complex parts of the receiver-side ba...

We introduce a purely electrical version of Maxwell's demon which does not involve mechanically moving parts such as trapdoors, etc. It consists of a capacitor, resistors, amplifiers, logic circuitry and electronically controlled switches and uses thermal noise in resistors (Johnson noise) to pump heat. The only types of energy of importance in this demon are electrical energy and heat. We also...

We introduce a purely electrical version of Maxwell’s demon which does not involve mechanically moving parts such as trapdoors, etc. It consists of a capacitor, resistors, amplifiers, logic circuitry and electronically controlled switches and uses thermal noise in resistors (Johnson noise) to pump heat. The only types of energy of importance in this demon are electrical energy and heat. We also...

The OEMs are currently being faced with a variety of contradictions in terms of market demands and governmental regulations, which force them to develop concepts that assure high fuel economy, low exhaust emissions and high specific power. Because mechanical losses can account for up to 10% of the fuel energy used, the key to achieving these specific customer/government demands is to enhance th...

When a query is passed to multiple search engines, each search engine returns a ranked list of documents. The problem of metasearch is to fuse these ranked lists such that optimal performance is achieved because of the combination. There are two parts of the metasearch process. The first part is to select which search engine results are to be merged. The second part is the actual process of mer...

–Working of web engine is to store and retrieve web pages. One of the various methods such as crawling, indexing is used. In this paper we will be discussing about latent semantic indexing which uses indexing technique. When a user enters a query into a search engine the engine examines its index and provides a listing of best-matching web pages according to its criteria, usually with a short s...

Support of the established technical characteristics engines is reached by its regular service and diagnostics in particular - existence diagnostic programs built onboard computer car which carry out constant control main parameters engine.Based on algorithm vibroacoustic diagnostics, a system vibration internal combustion engine (ICE) proposed, can be integrated into intelligent environment se...

The paper presents a method for designing a production process simulation system using workflow management technique, which consists of three parts: process model, organization resource model and workflow engine. Based on this method, we put forward a production process simulation system structure, and discuss the function of the key modules in detail. At last we present a sample in practical a...