This study aimed to predict positive surgical margins in breast-conserving surgery (BCS) using multiparametric MRI (mpMRI) and radiomics. A retrospective analysis was conducted on data from 444 BCS patients three Chinese hospitals between 2019 2024, divided into four cohorts five datasets. Radiomics features preoperative mpMRI, along with clinicopathological data, were extracted selected statistical methods LASSO logistic regression. Eight machine learning classifiers, integrated a transfer...

In this paper, a novel adaptive dynamic sliding mode control(ADSMC) methodology is developed for space manipulator control systems with external disturbance. The proposed ADSMC approach can make the stable and accurately track desired signals in presence of disturbances. Firstly, simplified model introduced. Then, mode(ADSM) controller given, which proved to be able guarantee high tracking accuracy via effectively estimating disturbance boundary. Finally, experimental results show that paper...

The concept of additive–subtractive hybrid manufacturing provides a new idea for the high-precision complex structural parts. Currently, under five-axis mode, existing research work concerned with sequence planning issues have limitations. This article presents method parts high precision. initial printing direction was determined based on an iterative search and constructed by part volume decomposition, which solved coupling problem decision machinability calculation. Under constraint tool...

For thin-walled parts, uniform allowance to each machining surface is allocated by the traditional method. Considering sequence of adjacent features, it may cause poor stiffness for some side walls due a minor wall thickness, which deformation final formed parts be large, or deduce efficiency features too thick remains. In order address this issue, non-uniform allocation method based on interim state finishing structural proposed in paper. method, model constructed according and taken as...

This paper designs a novel adaptive robust optimal sliding mode control (SMC) strategy for constrained input missile system with uncertain and unknown disturbance. First, smooth function is...

This paper addresses the attitude tracking control problem for a quadrotor considering model uncertainty and internal external disturbances. A high-order sliding mode scheme gain adaptation law are proposed class of nonlinear multiinput multioutput (MIMO) systems to design an controller quadrotor. The method has four advantages: (1) Boundary information uncertainties is not necessary; (2) signal continuous, hence, chattering effects can be attenuated; (3) measurements system state only...

In this paper, a sliding mode control method for manipulator in the presence of external disturbance is addressed. Firstly, dynamic model n-joint system introduced. Secondly, aiming at with disturbance, novel controller based on adaptive technique proposed, which parameter estimated and updated by online method. Further, stability overall under verified Lyapunov theorem. Besides, through method, there no need to obtain precise value disturbance. Finally, experimental results demonstrate that...

Background: Breast-conserving surgery (BCS) is a well-established therapeutic modality for women diagnosed with early-stage breast cancer. However, it carries the inherent risk of positive surgical margins, which can result in local recurrence and necessitate reoperation. In this study, we aimed to develop multiparameter margin radiomics model (MMRM) based on magnetic resonance imaging (MRI) predict margins BCS accurately.Methods: We conducted retrospective analysis 411 patients who...

This paper is concerned with the problem of stability analysis and contractive performance spatially interconnected time-delay systems in continuous-time domain, a sufficient condition to guarantee well-posedness, asymptotic established. An illustrative example provided demonstrate effectiveness proposed method.

A fault tolerant control (FTC) scheme based on adaptive sliding mode technique is proposed for manipulator with actuator fault. Firstly, the dynamic model of introduced and its faulty established. Secondly, a controller designed, in which both parameters external disturbance are estimated updated by online technology. Finally, taking two-joint as example, simulation results show that effective tolerating fault; meanwhile it has strong robustness disturbance.

A fault tolerant control(FTC) scheme based on adaptive sliding mode control technique with guaranteed stability are obtained for space manipulator under actuator fault. Firstly, the dynamic model of is addressed and its faulty modeled in free-swinging case. Secondly, external disturbance proposed, which a novel kind multiple surface design to reduce chattering convergence time conventional mode. Finally, effectiveness proposed controller successfully demonstrated by simulations dual-joint...

An adaptive PID sliding mode control method for 6 degree-of-freedom quadrotor is proposed in this paper. Firstly, the dynamic model of UAV introduced. Then divided into two parts which include position subsystem and attitude subsystem. Data that required are generated from Secondly, controller designed based on surface gains can be estimated online. The stability system was demonstrated by using Lyapunov theory. Finally, simulation carried out results show effectiveness method.

This paper investigates the problem of fixed-time attitude consensus tracking control for a team multiple rigid-bodies in presence unknown uncertainties. A robust exact distributed observer is presented to estimate velocity state virtual-leader followers that could not directly access information virtual-leader. Subsequently, novel law proposed, by which be achieved regardless any initial system state. When proposed scheme applied, effects time-varying disturbances acting on each follower...

This study is devoted to investigating the robust adaptive finite-time attitude tracking control problem for a rigid body subject unknown uncertainties. Considering about nonlinear dynamics body, homogeneous sliding variable designed by employing signum-function technique. For presented variable, real manifold, on which singularity avoided, could be achieved. Subsequently, novel signum-function-based MIMO (SMAHFTC) algorithm proposed. Finite-time convergence of errors region around origin...