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The effect of subpressure on the bond strength of resin to zirconia ceramic

Objective This study was conducted to investigate the effect of subpressure on the bond strength of resin to zirconia ceramic. The subpressure would create a pressure gradient which could clean out the bubbles in the adhesives or bonding interface. Methods Twenty-eight pre-sintered zirconia discs were fabricated. Half of them were polished (group P, n = 14), and the rest were ...

Regularized gradient-projection methods for finding the minimum-norm solution of the constrained convex minimization problem

Let H be a real Hilbert space and C be a nonempty closed convex subset of H. Assume that g is a real-valued convex function and the gradient ∇g is 1 L -ism with L > 0 . Let 0 < λ < 2 L + 2 , 0 < β n < 1 . We prove that the sequence { x n } generated by the iterative algorithm x n + 1 = P C ( I − λ ( ∇ g + β n I ) ) x n , ∀ n ≥ 0 converges strongly to q ∈ U , where q = P U ( 0 ) is ...

Weak convergence theorem for variational inequality problems with monotone mapping in Hilbert space

Fundamental Research Funds for the Central Universities (Grant: 3122016L006). Ming Tian was supported by the Foundation of Tianjin Key Laboratory for Advanced Signal Processing. 1. Korpelevich , GM: An

A regularization algorithm for a common solution of generalized equilibrium problem, fixed point problem and the zero points of the sum of two operators

For finding a common solution of generalized equilibrium problem, fixed point problem and the zero points of the sum of two operators, a regularization algorithm is established in the framework of real Hilbert spaces. And the strong convergence theorem is obtained under certain assumptions. The main results presented in this paper are useful in nonlinear analysis and optimization. ...

Usefulness of combined use of contrast-enhanced ultrasound and TI-RADS classification for the differentiation of benign from malignant lesions of thyroid nodules

writing the manuscript. Yan Zhang did the first draft. Ping Zhou provided instructive advice and useful suggestions for this manuscript. Shuang-ming Tian and Yong-feng Zhao provided statistical advice for

Strong convergence of a modified proximal algorithm for solving the lasso

As is well known the proximal iterative method can be used to solve the lasso of Tibshirani (J. R. Stat. Soc., Ser. B 58:267-288, 1996). In this paper, we first propose a modified proximal iterative method based on the viscosity approximation method to obtain strong convergence, then we apply this method to solve the lasso.

General iterative scheme based on the regularization for solving a constrained convex minimization problem

It is well known that the regularization method plays an important role in solving a constrained convex minimization problem. In this article, we introduce implicit and explicit iterative schemes based on the regularization for solving a constrained convex minimization problem. We establish results on the strong convergence of the sequences generated by the proposed schemes to a ...

Integrating a Numerical Taxonomic Method and Molecular Phylogeny for Species Delimitation of Melampsora Species (Melampsoraceae, Pucciniales) on Willows in China

The species in genus Melampsora are the causal agents of leaf rust diseases on willows in natural habitats and plantations. However, the classification and recognition of species diversity are challenging because morphological characteristics are scant and morphological variation in Melampsora on willows has not been thoroughly evaluated. Thus, the taxonomy of Melampsora species on ...

Regularized gradient-projection methods for the constrained convex minimization problem and the zero points of maximal monotone operator

Ming Tian Si-Wen Jiao In this paper, based on the viscosity approximation method and the regularized gradient-projection algorithm, we find a common element of the solution set of a constrained

Are estrogen-related drugs new alternatives for the management of osteoarthritis?

Osteoarthritis (OA) is a chronic degenerative disease involving multiple physiopathological mechanisms. The increased prevalence of OA after menopause and the presence of estrogen receptors in joint tissues suggest that estrogen could help prevent development of OA. This review summarizes OA research with a focus on the effects of estrogen and selective estrogen receptor modulators ...

Oxygen carrying capacity of salvaged blood in patients undergoing off-pump coronary artery bypass grafting surgery: a prospective observational study

Background Intraoperative cell salvage (ICS), hereby referred to ‘mechanical red cell salvage’, has been widely used and proven to be an effective way to reduce or avoid the need for allogeneic red blood cells (RBCs)transfusion and its associated complications in surgeries involving major blood loss. However, little is known about the influence of this technique on the functional ...

Methods for solving constrained convex minimization problems and finding zeros of the sum of two operators in Hilbert spaces

approved the final manuscript. Acknowledgements Ming Tian was supported by the Foundation of Tianjin key Laboratory for Advanced Signal Processing and the Fundamental Research Funds for the Central

Iterative algorithms based on the viscosity approximation method for equilibrium and constrained convex minimization problem

Ming Tian Lei Liu The gradient-projection algorithm (GPA) plays an important role in solving constrained convex minimization problems. Based on the viscosity approximation method, we combine the

Regularized gradient-projection methods for equilibrium and constrained convex minimization problems

In this article, based on Marino and Xu’s method, an iterative method which combines the regularized gradient-projection algorithm (RGPA) and the averaged mappings approach is proposed for finding a common solution of equilibrium and constrained convex minimization problems. Under suitable conditions, it is proved that the sequences generated by implicit and explicit schemes ...

Combined Use of Hyperbaric and Hypobaric Ropivacaine Significantly Improves Hemodynamic Characteristics in Spinal Anesthesia for Caesarean Section: A Prospective, Double-Blind, Randomized, Controlled Study

Purpose To observe the hemodynamic changes of parturients in the combined use of hyperbaric (4 mg) and hypobaric (6 mg) ropivacaine during spinal anesthesia for caesarean section in this randomized double-blind study. Methods Parturients (n = 136) undergoing elective cesarean delivery were randomly and equally allocated to receive either combined hyperbaric and hypobaric ...

Iterative methods for constrained convex minimization problem in Hilbert spaces

Ming Tian Li-Hua Huang In this paper, based on Yamada's hybrid steepest descent method, a general iterative method is proposed for solving constrained convex minimization problem. It is proved that

An Application of Hybrid Steepest Descent Methods for Equilibrium Problems and Strict Pseudocontractions in Hilbert Spaces

Ming Tian 0 Shusen Ding 0 College of Science, Civil Aviation University of China , Tianjin 300300 , China We use the hybrid steepest descent methods for finding a common element of the set of solutions

Quick biochemical markers for assessment of quality control of intraoperative cell salvage: a prospective observational study

Background Intraoperative Cell Salvage (ICS), hereby referred to ‘mechanical red cell salvage’, has been widely used in adult elective major surgeries to reduce requirement for homologous red blood cell transfusion and its associated complications. However, amount of free haemoglobin (fHb) from ICS has been shown related to incidence of renal failure. fHb is the most important ...