Facile Synthesis of Thiol‐functionalized Mesoporous Silica – Their Role for Heavy Metal Removal Efficiency          下载免费PDF全文

Ling‐Chu Lin  Munusamy Thirumavalavan  Jiunn‐Fwu Lee 《洁净——土壤、空气、水》2015,43(5):775-785

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Homotopy Perturbation Method‐Based Analytical Solution for Tide‐Induced Groundwater Fluctuations          下载免费PDF全文

Selva Balaji Munusamy  Anirban Dhar 《Ground water》2016,54(3):440-447

The groundwater variations in unconfined aquifers are governed by the nonlinear Boussinesq's equation. Analytical solution for groundwater fluctuations in coastal aquifers under tidal forcing can be solved using perturbation methods. However, the perturbation parameters should be properly selected and predefined for traditional perturbation methods. In this study, a new dimensional, higher‐order analytical solution for groundwater fluctuations is proposed by using the homotopy perturbation method with a virtual perturbation parameter. Parameter‐expansion method is used to remove the secular terms generated during the solution process. The solution does not require any predefined perturbation parameter and valid for higher values of amplitude parameter A/D, where A is the amplitude of the tide and D is the aquifer thickness.  相似文献