intelligent wells provide the ability for monitoring and control of downhole environment of the wells. downhole monitoring is achieved through sensors while control is realized with downhole valves. recovery from intelligent wells can be improved by proper selection of candidate wells/fields and optimizing the number, location and performance of the installed interval control valves. design cri...

   In this paper, a new robust approach based on Least Square Support Vector Machine (LSSVM) as a proxy model is used for an automatic fractured reservoir history matching. The proxy model is made to model the history match objective function (mismatch values) based on the history data of the field. This model is then used to minimize the objective function through Particle Swarm Optimization (...

Multi-proxy signature allows an original signer authorizing a proxy group as his proxy agent and only the cooperation of all proxy signers in the group can create a proxy signature on behalf of the original signer. Recently, Jin and Wen defined a formal model of certificateless multi-proxy signature and proposed a concrete scheme. They claimed that their scheme is provably secure in their secur...

We quantify the relative importance of various drivers behind subprime borrowers’decision to default. In our econometric model, we allow borrowers to default either because doing so increases their lifetime wealth or because of short-term credit constraints, taking into account that either factor by itself is suffi cient to induce default. Our model also incorporates various proxies for borrowe...

The first essay “A Simple Threshold Model of Theft” proposes and estimates a simple threshold model of theft, where all individuals have access to the same distribution of theft opportunities, and what differentiates them is their expectation of the cost of theft. The data support the basic assumptions of the model. The best predictors of theft are variables that are good proxies for patience a...

Proxy signatures allow a signer to delegate signing ability to a proxy signer. Many schemes have been proposed for proxy signatures under typical security requirements. The authors propose a proxy signature model with extended security requirements. Based on Shamir’s online/ offline signature scheme, a proxy signature scheme is proposed for the model. In addition to the typical requirements, th...

A new identity based proxy signature scheme Bin Wang Information Engineering College of Yangzhou University Yangzhou City, Jiangsu Province, P.R.China Tel: 086-0514-82220820 E-mail:[email protected] Abstract: Proxy signature schemes allow a proxy signer to generate proxy signatures on behalf of an original signer. Mambo et al. first introduced the notion of proxy signature and a lot of researc...