Research and Implementation of a Refrigeration Load Reduction System

Научная и техническая литература

Research and Implementation of a Refrigeration Load Reduction System

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In this study, a system was developed to shift electrical load out of Eskom’s peak period to the off-peak periods. This system was designed, based on research done for load shift philosophies of a refrigeration system of a mine. The investigation focussed on the mining industry, for it consumes a large percentage of the electrical energy generated in South Africa. The research results ensured a successful implementation of a Demand Side Management (DSM) program on the ventilation and cooling (VC) system of a mine, where large energy savings are possible. The installation of the new system’s controllers and control philosophy, resulted in a successful load shift execution during the Eskom evening peak period. Additional to the load shift results, energy efficiency was also obtained through this implementation on the refrigeration system. The success of the research can be proven by the actual energy savings achieved, compared to the predicted savings. The annual estimated load shift averaged around of 2.9 MW, with 3.5 MW during the nine summer months and 1.9 MW during the three winter months.

Admissibility of Stochastic Linear Volterra Operators

Научная и техническая литература

Admissibility of Stochastic Linear Volterra Operators

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This work examines the long run behaviour of both differential and difference, deterministic and stochastic linear Volterra equations. It is shown how observable phenomena in inefficient financial markets may be present in the solutions of stochastic functional differential equations. Firstly, we consider a stationary autoregressive conditional heteroskedastic (ARCH) process of order infinity. Necessary and sufficient conditions are established for the autocovariance function to lie in a particular class of slowly decaying sequences. Secondly, an admissibility theory of stochastic Volterra operators is developed which characterises sufficient conditions for almost sure convergence of stochastic Volterra integrals. This theory is applied to find the exact asymptotic behaviour of the solutions of a class of affine stochastic Volterra equations. Lastly the exact asymptotic behaviour of a stochastic differential equation with an average functional is determined for all real values of the parameters of the equation. This equation may be viewed as modelling the demand of traders in an inefficient financial market. A discretisation of this stochastic differential equation is also studied.

Избранные научные труды. Математика

Научная и техническая литература

Избранные научные труды. Математика

Автор: Иванов В.К

Настоящее издание представляет собой сборник избранных работ выдающегося российского математика, члена-корреспондента РАН В.К. Иванова (1908 — 1992). В нем представлены работы по основным направлениям научной деятельности В.К. Иванова: теории приближения функций, обратной задаче потенциала, некорректно поставленным задачам, теории обобщенных функций. Труды представляют интерес для математиков и геофизиков, работающих в данных направлениях, а также для студентов и аспирантов, специализирующихся в этих дисциплинах.

Calculation of fusion reaction cross-sections

Научная и техническая литература

Calculation of fusion reaction cross-sections

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This book has explicitly discussed how the probability of fusion reactions which is named fusion reaction cross-section here is calculated. The book give semi-classical approach to the calculation of fusion reaction cross-section and the angular momentum needed for a possible fusion reaction of the used heavy ions. Heavy ions are those ions whose A>4 and are generally assumed to be too heavy for fusion reaction. This book has shown theoretically that it is possible to have heavy ions fuse.

Prevalence of Malarial Parasites (MPs) in symptomatic patients

Научная и техническая литература

Prevalence of Malarial Parasites (MPs) in symptomatic patients

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Malarial Parasites (MPs) cost life and property every year in significant epidemiological purviews in malaria endemic regions. Treatments of malaria largely follow some traditionally predefined Clinical symptoms, resulting into very lower positive predictive value (ppv) of the tool. The treatment failure cases in malaria accrue from a combination of some undue intervening factors among which very poor entertainment of proper diagnosis with Microscopy of blood samples is very concerning to Roll Back Malaria control strategy of WHO. In this work, blood samples from malarial symptomatic patients were screened through RDT and Microscopy. The incidences of mono infections, and mixed infections of the species of the genus Plasmodium have been analysed by using the two diagnostic tools for malarial infections. This study envisaged on the comparative incidences of MPs between different host and parasite species groups. The inferences on prevalence status of MPs implied here, will hopefully offer an initial base for future workers in tracing out the effectiveness of the curative and preventive interventions applied during the period of 2005-2010 in some malaria endemic areas of Bangladesh