1,601 research outputs found
A Robust Repetitive-Control Design for a Class of Uncertain Stochastic Dynamical Systems
No full textIn this brief, we study the problem of output tracking for continuous-time stochastic dynamical systems with parametric uncertainties and aperiodic disturbances by using a modified repetitive controller (MRC). More precisely, the MRC is obtained based on the equivalent input disturbance (EID) technique such that the closed-loop modified repetitive-control system is asymptotically stable in the presence of uncertainties and aperiodic disturbances. The main advantage of the proposed controller is that it can incorporate an EID estimator, which estimates and eliminates disturbances in the repetitive-control systems. Finally, simulation is conducted to reveal that the proposed controller can effectively reject the aperiodic disturbance, reduce the stochastic noise, and track the reference signal without steady-state error
EID-based sliding mode investment policy design for fuzzy stochastic jump financial systems
No full textThis paper proposes a sliding mode investment policy design for nonlinear stochastic financial systems which can be represented by the well-known Takagi–Sugeno fuzzy model. When modeling the financial systems, it is more important to consider the unpredictable investment changes and worldwide unpredictable events which can be regarded as external disturbances. The equivalent-input-disturbance (EID) approach combined with sliding mode investment policy design is implemented to reject the unpredictable investment changes for having better investment. Moreover, the Luenberger state observer is constructed for the addressed financial system to estimate the unpredictable investment changes and worldwide unpredictable events. More precisely, a sliding mode investment policy design is developed by solving the obtained linear matrix inequality (LMI)-based constrained algorithm. Finally, the obtained results of the addressed fuzzy stochastic financial system are verified through numerical simulation to show efficiency of the proposed sliding mode investment policy design
Adaptive reliable output tracking of networked control systems against actuator faults
Get PDFThis paper investigates the reliable adaptive observer-based output tracking control problem for a class of networked control systems subject to actuator faults and external disturbances via equivalent-input disturbance technique. Notably, the reliable control design based on adaptive mechanism is implemented to compensate the on-line actuator faults automatically and an observer-based controller is introduced through communication networks to drive the output of controlled plant to track the output of a reference model. Moreover, due to the effect of network-induced delays and packet dropouts in the controller-to-actuator channel, the inputs of controlled plant and observer-based tracking controller are updated in an asynchronous way. Then, based on the asynchronous characteristic, the resulting closed-loop networked control system is formulated with two interval time-varying delays for obtaining the required result. In particular, the equivalent-input disturbance approach improves the disturbance rejection performance and it does not require any prior knowledge of the disturbances. By constructing a suitable Lyapunov–Krasovskii functional and using free-weighting matrix approach, a new set of sufficient conditions for the solvability of the addressed problem is derived in terms of linear matrix inequalities. At last, the proposed result is validated through two numerical examples and also a comparison study is presented which shows the effectiveness of the developed control scheme over some existing conventional control schemes
datacarpentry/r-intro-geospatial: Introduction to R for Geospatial Data August 2018 Release
No full text<p>Initial Release of the Data Carpentry lesson: Introduction to R for Geospatial Data</p>
Social Discrimination in the Novel ‘Thol’by D. Selvaraj
Get PDFThe novel is a new genre of literature introduced in the twentieth century in Tamil. The first book in Tamil was written by Samuel Vedanayagam Pillai. Then, new writers emerged and contributed their writing in different genres. In this way, progressive author D. Selvaraj focused on the condition of tanners in the Dindigul regions in his novel "Thol" He explains the tannery workers' struggles, how they affected their families, and how they eventually succeeded in gaining their rights. These are described using the regional dialect. There are 117 characters in this novel, which has 26 chapters. Although many scholars claim that all people are equal, this has never been put into practice. It is this system of social discrimination that gives rise to the idea that all human beings are of the same race, intertwined in occupational caste differences, and inspires the attitude of one man to regard another as inferior. Anthropologists have opined that it was in India that caste systems emerged as industrial divisions and changed their shape. Based on these, this article aims to investigate the social discrimination shown in leather goods
Block Codes on Pomset Metric
Get PDFGiven a regular multiset on , a partial order
on , and a label map defined by with , we define a pomset block metric
on the direct sum of
based on the pomset . The pomset block
metric extends the classical pomset metric introduced by I. G. Sudha and R. S.
Selvaraj and generalizes the poset block metric introduced by M. M. S. Alves et
al over . The space is
called the pomset block space and we determine the complete weight distribution
of it. Further, -perfect pomset block codes for ideals with partial and full
counts are described. Then, for block codes with chain pomset, the packing
radius and Singleton bound are established. The relation between MDS codes and
-perfect codes for any ideal is investigated. Moreover, the duality
theorem for an MDS pomset block code is established when all the blocks have
the same size.Comment: 15 Page
1,25-dihydroxyvitamin D3 and development of tuberculosis in cattle
No full textThis report describes the presence and activity of 1,25-dihydroxyvitamin D3 (1,25-D3) in experimental bovine tuberculosis. Animals that went on to develop tuberculous lesions exhibited a rapid transient increase in serum 1,25-D3 within the first 2 weeks following infection with Mycobacterium bovis. 1,25-D3-positive mononuclear cells were later identified in all tuberculous granulomas by immunohistochemical staining of postmortem lymph node tissue. These results suggest a role for 1,25-D3 both at the onset of infection and in the development of the granuloma in these infected animals. Using a monoclonal antibody to the vitamin D receptor (VDR) as a VDR agonist, we confirmed that activation of the vitamin D pathway profoundly depresses antigen-specific, but not mitogenic, bovine peripheral blood T-cell responses (proliferation and gamma interferon production). Investigation of the mechanism of this suppression showed that the VDR antibody modified the expression of CD80 by accessory cells, such that a significant positive correlation between T-cell proliferation and accessory cell CD80 emerged
Not Available
No full textNot AvailableIn the originally published version of this article, the authors neglected to include author Owen G. James as a co-author and misspelled author Bhuvaneish Selvaraj as ‘‘Bhuvaneish Selvaraja.’’Both names have been corrected here and online. The authors apologize for the errors and any confusion it may have caused.Not Availabl
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