This article proposes a novel maximum power point tracking (MPPT) method based on the variant of pigeon-inspired optimization (PIO) algorithm for photovoltaic systems under partial shading conditions (PSCs). The proposed integrates hierarchical network behavior pigeon flock and revises map compass operator original PIO to improve efficiency. In addition, landmark is used perform small-scale sea...

Aim/Background. Actuarial risk tools are commonly used in corrections and forensic mental health settings. Given their widespread use, it is important that evaluators and decision-makers understand how scores on these tools relate to recidivism risk. Relative risk is one useful metric for communicating an offender's risk of reoffending. Methods. In the current study, risk ratios were computed f...

The safety of foundation pit construction is gaining widespread attention. In order to reduce the risks and avoid problems brought by pits, it necessary study construction. This paper takes actual a building as background. Firstly, possible main were identified summarized, then, evaluation index system was formed. Secondly, risk levels various types derived through analytic hierarchy process (A...

This qualitative study followed the development of 94 pre-service teachers’ assessment perceptions in an introductory course on student assessment. Analysis students’ retrospective and end identified five dimensions. Considerable shifts were detected each dimension: from summative to formative assessment, negative positive perceptions, perceiving as a simple concept complex multifaceted one, hi...

PURPOSE Classification based on a combination of molecular and pathologic predictors had never been done using hierarchical cluster analysis. For this purpose, we identified prognostic classification based on molecular predictors, pathologic and molecular predictors, and compared their respective prognostic efficacy together with that of tumor-node-metastasis (TNM) stage. Moreover, we investiga...

This study proposes a novel hierarchical nonlinear proportional-integral fast terminal sliding mode (HNLPIFTSM) control for permanent magnet synchronous motor (PMSM) speed regulation system. A new type of surface called HNLPIFTSM surface, which combines the benefits (PI) and (FTSM) is proposed to enhance robustness improved dynamic response, whilst preserving great property conventional (HFTSM)...

Conic optimization is the minimization of a differentiable convex objective function subject to conic constraints. We propose novel primal–dual first-order method for optimization, named proportional–integral projected gradient (PIPG). PIPG ensures that both gap and constraint violation converge zero at rate O(1/k), where k number iterations. If strongly convex, improves convergence O(1/k2). Fu...

deregulation policy has caused some changes in the concepts of power systems reliability assessment and enhancement. in this paper, generation reliability is considered, and a method for its assessment using intelligent systems is proposed. also, because of power market and generators’ forced outages stochastic behavior, monte carlo simulation is used for reliability evaluation. generation r...

in this ever changing business scenario, success of the company lies in understanding the customer preferences, tastes and anticipating the changes required in existing or new products being offered. it was desired to develop a model which allows decision makers to decompose a complex problem in a hierarchical structure to show the relationship of the goals, objectives, criteria and alternative...