Research
An Algorithm for Solving Bi-criteria Large Scale Transshipment Problems
This paper describes an algorithm for solving a certain class of bi-criteria multistage transportation problems with transshipment (BMTSP). A several bi-criteria multistage transportation problem with transshipment are formulated. The presented algorithm is mainly based on application of the methods of solving bi-criteria single stage transportation problems, utilizing available decomposition techniques for solving large-scale linear programming problems, and the methods of treating the transshipment problems. The mathematical formulation of the presented class does not affect the special structure of the transshipment problem for each of the individual stages. An illustrative example is introduced to validate that the implementation of the algorithm.
Development a Single Zone Heat Release Model
Single zone heat release models can effectively be used to model diesel engine combustion process with acceptable degree of accuracy. These models are mainly depend on double Wiebe function which requires as many as six parameters in order to predict the heat release rate (HRR) accurately. However, Wiebe function does not look into the physical air fuel mixing process during the ignition delay (ID) which makes their predictions far from understanding the relation between the HRR and the physical interaction between air and fuel prior to combustion. Whitehouse and Way model covers the physical process since it deals with the mass of fuel injected and the partial pressure of oxygen in which the reaction rate is computed by an Arrhenius type expression. In this work, a strong relationship between HRR and air mass entrained during the ID has been shown. A new single zone heat release model based on Whitehouse and Way model for diesel engine has been developed in order to predict the HRR using standard diesel fuel. The new model has shown to give good results compared to experimental data.
Drop Damping Seat to Reduce Whiplash Injury in Rear-end Collision
Neck injuries caused by rear end collisions have become a major problem in traffic safety over the last two decades. This situation calls for more research in the field. One area of interest is a damping seat slide to reduce neck injury. To reduce neck injury (Whiplash), based upon new biomechanical research, the motion between head and torso should be reduced. In case of a rear end impact new seat will slide backwards during the impact which allows the motion to damp. Working Model software was used first to simulate and analyse the behaviour of the new system. Also the sled test rig was developed for experimental purposes. The results show occupant protection increases with the new damping seat by up to 75%.
Linear Damping Seat to Reduce Whiplash Injury in Rear-end Collision
Neck injuries caused by rear end collisions have become a major problem in traffic safety over the last two decades. This situation calls for more research in the field. One area of interest is a damping seat slide to reduce neck injury. To reduce neck injury (Whiplash), based upon new biomechanical research, the motion between head and torso should be reduced. In case of a rear end impact new seat will slide backwards during the impact which allows the motion to damp. Working Model software was used first to simulate and analyse the behaviour of the new system, also a test rig was developed for experimental purposes. The results show occupant protection increases with the new damping seat slide by reducing the NIC 35%.
