Current Issue : July - September Volume : 2015 Issue Number : 3 Articles : 6 Articles
A method for the detection of abnormal behavior in HVAC systems is presented. The method combines deterministic subspace\nidentification for each zone independently to create a system model that produces the anticipated zone�s temperature and the\nsequential test CUSUM algorithm to detect drifts of the rate of change of the difference between the real and the anticipated\nmeasurements. Simulation results regarding the detection of infiltration heat losses and the detection of exogenous heat gains\nsuch as fire demonstrate the effectiveness of the proposed method....
Rapidly increasing consumption and consequent depletion of reserves clearly show that the end of the fossil fuel age is not far. Besides there fuels are the chief contributors to urban air pollution and major sources of green house gases. Since Biodiesel can be operated in almost all diesel engines, it offers an immediate displacement of petroleum. Biodiesel technically is sold off at high cost due to the complex processing protocol. Biodiesel production also makes by-products that are of significant market value. In fact, the economic viability of today’s Biodiesel industry is so sensitive that the overall economic viability is highly dependent the market price of these byproducts....
Currently, there are many techniques available for short-term forecasting of the electricity market clearing price (MCP), but very\nlittle work has been done in the area of midterm forecasting of the electricity MCP. The midterm forecasting of the electricity\nMCP is essential for maintenance scheduling, planning, bilateral contracting, resources reallocation, and budgeting. A two-stage\nmultiple support vector machine (SVM) based midterm for e casting model of the electricity MCP is proposed in this paper.The first\nstage is utilized to separate the input data into corresponding price zones by using a single SVM. Then, the second stage is applied\nutilizing four parallel designed SVMs to forecast the electricity price in four different price zones. Compared to the forecasting\nmodel using a single SVM, the proposed model showed improved forecasting accuracy in both peak prices and overall system.\nPJM interconnection data are used to test the proposed model....
Tungsten heavy alloys (WHAs) belong to a group of two-phase composites, based on W-Ni-Cu and W-Ni-Fe alloys. Due to\ntheir combinations of high density, strength, and ductility,WHAs are used as radiation shields, vibration dampers, kinetic energy\npenetrators and heavy-duty electrical contacts. This paper presents recent progresses in processing, microstructure, andmechanical\nproperties of WHAs. Various processing techniques for the fabrication of WHAs such as conventional powder metallurgy (PM),\nadvent of powder injectionmolding (PIM), high-energy ball milling (MA), microwave sintering (MW), and spark-plasma sintering\n(SPS) are reviewed for alloys. This review reveals that key factors affecting the performance of WHAs are the microstructural\nfactors such as tungsten and matrix composition, chemistry, shape, size and distributions of tungsten particles in matrix, and\ninterface-bonding strength between the tungsten particle and matrix in addition to processing factors. SPS approach has a better\nperformance than those of others, followed by extrusion process. Moreover, deformation behaviors of WHA penetrator and\ndepleted uranium (DU) Ti alloy impacting at normal incidence both rigid and thick mild steel target are studied and modelled\nas elastic thermoviscoplastic. Height of the mushroomed region is smaller for ? = 0.3 and it forms sooner in each penetrator as\ncompared to that for ? = 0.2....
This paper investigates the potential of utilizing the exhaust waste heat using an integrated mechanical device with internal\ncombustion engine for the automobiles to increase the fuel economy, the useful power, and the environment safety. One of the\nways of utilizing waste heat is to use a Stirling engine. A Stirling engine requires only an external heat source as wasted heat for its\noperation. Because the exhaust gas temperature may reach 200 to 700?C, Stirling engine will work effectively.The indication work,\nreal shaft power and specific fuel consumption for Stirling engine, and the exhaust power losses for IC engine are calculated. The\nstudy shows the availability and possibility of recovery of the waste heat from internal combustion engine using Stirling engine....
We investigate the relation between financial development, energy consumption, and economic growth in the economy of Lebanon\nover the period 2000M2ââ?¬â??2010M12.Our findings confirmthe existence of cointegration among the variables.Theresults indicate that\nfinancial development and energy consumption contribute to economic growth in Lebanon. The impact of energy consumption on\neconomic growth is positive showing the significance of energy as a main stimulant of economic growth. Financial development is\nalso found to play a vital role in enhancing economic growth. Financial development and economic growth also result in further\nincrease in energy consumption. We offer some policy implications specific to Lebanon considering the recent discovery of large\noil and gas reserves in the country and the historical importance of its banking sector which remains a center of Lebanonââ?¬â?¢s serviceoriented\neconomy....
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