نتایج جستجو برای: rrr
تعداد نتایج: 869 فیلتر نتایج به سال:
Abstract Resource recovery and reuse (RRR) of fecal sludge (FS) from onsite sanitation systems describes the concept turning human waste into valuable end products. However, studies on peoples' perceptions FS-derived products are still limited. Guided by knowledge, attitudes practices framework, data a survey 395 households, focus group discussions key informant interviews, this article explore...
IMPORTANCE The growing rate of contralateral prophylactic mastectomy (CPM) among women diagnosed as having breast cancer has raised concerns about potential for overtreatment. Yet, there are few large survey studies of factors that affect women's decisions for this surgical treatment option. OBJECTIVE To determine factors associated with the use of CPM in a population-based sample of patients...
BACKGROUND Self-perceived uselessness is associated with poor health and high mortality among older adults in China. However, it is unclear which demographic, psychosocial, behavioral and health factors are associated with self-perceived uselessness. METHODS Data came from four waves (2005, 2008, 2011 and 2014) of the largest nationwide longitudinal survey of the population aged 65 and older ...
BACKGROUND Health behaviour patterns in older groups, including tobacco and alcohol use, are key factors in chronic disease prevention. We explore ageing self-perceptions as motivating factors behind smoking and drinking alcohol in older adults, and the complex reasons why individuals engage harmfully in these behaviours. METHODS Cigarette and alcohol use was assessed in a large cross-section...
The coe)cient matrix of a cointegrated +rst-order autoregression is estimated by reduced rank regression (RRR), depending on the larger canonical correlations and vectors of the +rst di.erence of the observed series and the lagged variables. In a suitable coordinate system the components of the least-squares (LS) estimator associated with the lagged nonstationary variables are of order 1=T , wh...
Four new enantiomerically and diastereomerically pure hemicryptophane hosts (M-SSS-2/P-SSS-2 and M-RRR-2/P-RRR-2 pairs) were designed for the recognition of sugar derivatives. Their absolute configuration was determined from the circular dichroism spectra and DFT calculations. The host molecules were then used for the stereoselective recognition of glucopyranosides. Binding constants were obtai...
In genomics, transcriptomics, and related biological fields (collectively known as omics), combinations of experimental techniques can yield multiple sets features for the same set replicates. One example is Patch-seq, a method combining single-cell RNA sequencing with electrophysiological recordings from cells. Here we present framework based on sparse reduced-rank regression (RRR) obtaining a...
INTRODUCTION Immunosuppressive agents (ISA) have been used in multiple sclerosis (MS) for decades, frequently as off label licensed therapies. Given the new MS treatment landscape, what place do ISA have in combating MS? METHODS We conducted a retrospective multicentre study to investigate the frequency of ISA prescription in 17 Italian MS centres, and to describe the clinical factors related...
Optimization Design by Genetic Algorithm Controller for Trajectory Control of a 3-RRR Parallel Robot
In order to improve the control precision and robustness of the existing proportion integration differentiation (PID) controller of a 3-Revolute–Revolute–Revolute (3-RRR) parallel robot, a variable PID parameter controller optimized by a genetic algorithm controller is proposed in this paper. Firstly, the inverse kinematics model of the 3-RRR parallel robot was established according to the vect...
We propose a new procedure to perform Reduced Rank Regression (RRR) in nonGaussian contexts, based on Multivariate Dispersion Models. Reduced-Rank Multivariate Dispersion Models (RR-MDM) generalise RRR to a very large class of distributions, which include continuous distributions like the normal, Gamma, Inverse Gaussian, and discrete distributions like the Poisson and the binomial. A multivaria...
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