Abstract:\nGiven the importance of trade management this study concerns with calculation of Iran\'s bilateral trade costs with major developing and developed partners for three commodity groups including: agricultural, non-agricultural and total between 1995 to 2011. Based on the results of using the Novy (2012) method, the weighted average cost of Iran\'s trade with developing countries in three mentioned groups is lower than the developed partners. Finally it is sugggested that for increase power contest of export, products must be destine based on trade costs and trade with developing countries should be expanded.

The aim of this study is to find out the optimum operating conditions in a diesel engine fueled with biogas-diesel dual fuel. One dimensional (1D), three dimensional (3D) computational fluid dynamics (CFD) code and multi-objective optimization code are employed to investigate the influence of biogas-diesel dual fuel combustion performance and exhaust emissions in a diesel engine. In this paper, 1D engine code and multi-objective optimization code are coupled and evaluated about 15000 cases to define the proper boundary conditions. In addition, selected single diesel fuel (Dodecane) and dual fuel (biogas-diesel) combustion modes are modeled to compare the engine performances and exhaust emission characteristics by using CFD code under various operating conditions. In optimization study, start of pilot diesel fuel injection, biogas-diesel flow rate and engine speed are optimized and selected cases are compared using CFD code. Biogas and diesel fuels are defined as leading reactants using user defined code. The results showed that, significantly lower NOx emissions are emitted under dual-fuel operation for all cases compared to single-fuel mode at all engine load conditions. Also, biogas-diesel provided superior performance in reductions of NOx and soot emissions.

In this study High Density Poly Ethylene (HDPE) with Styrene Butadiene Rubber(SBR) polymer with elastomeric composites with properties were determined of the sound. A sound absorption material composed of blends of HDPE with SBR developed. Measurements indicate that HDPE ratios have a significant effect on the acoustic absorption performance of the blend due to their microstructures and physical features. There was sound absorption in the frequency range between 100 and 6400 where is high frequency range. The results were filtered via numeric analyses program. In the light of all these data, it was seen that SBR contribution leads to property of acoustics behaviors.

The research subject of this paper is analysis of international competitiveness of the processed food sector, in order to point out the countries with a stable market position in the sector. In this research, we used indexes: RXA, RTA, ln RXA, RC and RCA. We have dynamically perceived the existence of correlation between the received indexes for each country, index change over time and extracted the commodity groups that belong to the processed food sector in which countries have a comparative advantage. Research results indicate an intensification of trade in the processed food sector, and an increase in competitiveness of processed food sectors in Czech Republic, Hungary, Germany, Serbia and Ukraine, while in other countries a decrease of competitiveness occurred.

In this paper, we take advantage of the mathematical software Maple for the auxiliary tool to study the partial differential problem of two types of two-variables functions. The infinite series forms of any order partial derivatives of these two-variables functions can be obtained by using complex power series method and differentiation term by term method, and hence greatly reduce the difficulty of calculating their higher order partial derivative values. In addition, we propose two examples to do calculation practically. The research methods adopted in this study involved finding solutions through manual calculations and verifying these solutions by using Maple.

Eucalyptus oil was assessed for its penetration enhancing effect towards the various drugs with different solubilities of water. The results showed that the oil is more effective towards water soluble drugs, showing maximum enhancing effect towards 5-Flurouracl (5-FU) i.e., approximately 60 fold and less towards tramadol hydrochloric acid (approximately. 40 fold). The enhancing effect of the oil towards hydrophobic drug was poor, as in case of ketoprofen it caused only 5.6 fold increase in the permeability coefficient.

this paper, different usages of poultry manure at biogas plants, such as alone itself, with water addition and with cattle manure alternatives, feasibility studies of various scenarios have been done. Among these alternatives, co-fermentation of poultry manure and cow manure in cylindrical and wet processed systems is the best possible economic investment choice.

Abstract- This paper investigates the performance, emission and combustion characteristics of biodiesel (Neem oil methyl ester: NOME) blend in a single-cylinder water-cooled diesel engine at a constant speed of 1500 rpm. The experiments were carried out at in a diesel engine with 20% biodiesel-diesel blend and neat biodiesel with different compression ratios such as 17.5:1, 18.5:1 and 19.5:1 under different load conditions. The measured values are analyzed are compared with diesel fuel. The results showed that the higher brake thermal efficiency and lower brake specific fuel consumptions for B20 with CR 19.5 and have lower carbon monoxide, unburned hydrocarbon at full load. The nitrogen oxide (NOx) emission was increased and smoke emissions were decreased for B20 compared with diesel fuel. The peak pressure and heat release rate were higher for B20 blend with compression ratio 19.5 compared to diesel fuel at full load. It is concluded that the 20% biodiesel blend with 19.5 compression ratio gave better performance, emission reduction and combustion of biodiesel without any other hardware modifications of the engine.

The maximal flow problem is consider as one of the classic combinatorial optimization problems and hence gradually becomes the area of interests for the researchers and engineers. But in real life there exist uncertainty in the capacity as well as in the flow parameters of an arc of a network. Finding the maximum flow between the source and destination nodes of a network with uncertainties in its flow and capacities has many applications in different domains such as electrical powers, traffics, communications, computer networks and logistics. In this paper the classical Ford-Fulkerson algorithm for maximal flow problem has been modified to find the maximum flow of an network where the flow capacity of each arc is expressed as intuitionistic normal fuzzy numbers (INFNs) having degree of acceptance and degree of rejection. The Improved Intuitionistic Fuzzy Maximal Flow Algorithm (IIFMFA) proposed in this paper can solve intuitionistic normal fuzzy maximal flow problem (INFMFP) using intuitionistic normal fuzzy order weighted geometric averaging (INFOWGA) aggregation operator. To validate the proposed algorithm a numerical example is presented where we compare the augmenting flow chains of a crisp network with that of an intuitionistic fuzzy network.