This paper presents an optimum amplifying relay matrix based on minimum mean square error (MMSE) criteria for the cooperative distributed wireless relay networks under channel uncertainty and total power constraint at the relay nodes. A one-source-one-destination pair node and N relay nodes are considered, which can be extended for a general case. All relays are assumed to exchange their receiv...

the performance of a γ-al 2 o 3 /n-decane nanofluid shell-and-tube heat exchanger in a biomass heating plant is analyzed to specify the optimum condition based on the maximum heat transfer rate and performance index for wide range of nanoparticle volume fraction (0–7%). compared with pure          n-decane, the obtained results in this research show that by using γ-al 2 o 3 /n-decane nanofluid ...

Through the analysis of Travelling Salesman Problem with Pickup and Delivery (TSPD) in the related research, two kinds of logistics systems including whole logistics system and partial logistics system under one-to-many logistic network are considered. And mathematical model is set up, then, nested cost optimization model is set up in order to meet the constraint condition of nested order cycle...

In this paper, failure step stress-partially accelerated life tests (FSS-PALT) are considered when the lifetime of a product follows a generalized inverted Rayleigh distribution (GIRD). Based on Type II censoring, the maximum likelihood estimates (MLEs) of model parameters are obtained. Also, the asymptotic variances and covariances matrix of the estimators is studied. The optimum proportion of...

In this paper we consider MIMO system with Mt transmitting and Mr receiving antennas, when channel state information (CSI) is known on the transmitter side. The Reyleigh fading channel propagation condition is assumed. In this case, the optimum transmission consists of allocating the transmitted power for each virtual sub-channel related to the corresponding eigenvalue of the channel matrix. Th...

A simple, rapid and highly sensitive fluorometric method for the determination of pazufloxacin mesilate (PZFX) is described. It is based on the formation of the complex [Tb(PZFX)2](3+), which shows the intensive characteristic bands of Tb3+. Optimum conditions for the determination were investigated. Under the optimum experimental condition, the fluorescence intensity responds linearly to the P...

An optimum design with silicon-on-insulator (SOI) device structure was proposed to eliminate back gate bias effect of the lateral double diffused metal-oxide-semiconductor field effect transistor (LDMOSFET) and to improve breakdown voltage. The SOI structure was characterized by low doping buried layer (LDBL) inserted between the silicon layer and the buried oxide layer. The LDBL thickness is a...

This paper presents an optimum design of constant-stress partially accelerated life test (PALT) plan in which each item runs either at use or accelerated condition and product life follows Truncated Logistic distribution truncated at point zero under type-I censoring. Truncated distributions arise when sample selection is not possible in some sub-region of sample space. The optimal sample propo...

We present a simple unscaled, quantitative framework that addresses the optimum use of resources throughout a host's lifetime based on continuous exposure to parasites (rather than evolutionary, genetically explicit trade-offs). The principal assumptions are that a host's investment of resources in growth increases its survival and reproduction, and that increasing parasite burden reduces survi...