Explanipedia

CTHRC1 overexpression in gastric cancer patients contributes to a poorprognosis and is related to immune cell infiltration Open

Tao Guo, Qixin Xie, H. Deng, Changjun Yu, Changyi Fang · 2025

Gastric cancer is a common solid tumor of the digestive system, This research aimed to investigate the relationships among CTHRC1 expression, prognostic values and tumor-infiltrating immune cells (TIICs) in GC patients.The expression of CT…

Simplicity vs. Complexity in time series forecasting: a comparative study of iTransformer variants Open

Polycarp Shizawaliyi Yakoi, Xiangfu Meng, Changjun Yu, Victor Adeyi Odeh, Danladi Suleman · 2025

According to recent time series forecasting research, simpler models frequently perform better than their more complex counterparts, particularly over longer time horizons. By comparing two improved versions of the iTransformer—MiTransform…

Convergence Analysis of Stochastic Accelerated Gradient Methods for Generalized Smooth Optimizations Open

Changjun Yu, Yusu Hong, Junhong Lin · 2025

We investigate the Randomized Stochastic Accelerated Gradient (RSAG) method, utilizing either constant or adaptive step sizes, for stochastic optimization problems with generalized smooth objective functions. Under relaxed affine variance …

A new computational approach for optimal control of switched systems Open

Xi Zhu, Yanqin Bai, Changjun Yu, Kok Lay Teo · 2024

The combination of the time-scaling transformation and control parameterization has proven to be an effective approach in addressing optimal control problems involving switching systems with predefined subsystem sequences. However, this ap…

On the correlation of local collocation and control parameterization methods Open

Shuxuan Su, Mengzhen Shao, Changjun Yu, Kok Lay Teo · 2024

Local collocation and control parameterization are popular computational methods for solving optimal control problems. The local collocation method works by discretizing both the state and control variables, whereas control parameterizatio…

Cranial electrotherapy stimulation alleviates depression-like behavior of post-stroke depression rats by upregulating GPX4-mediated BDNF expression Open

Xiaoju Wang, Peng Xia, Jiulong Song, Ting Yang, Changjun Yu , et al. · 2022

To elucidate whether cranial electrotherapy stimulation (CES) improves depression-like behavior of post-stroke depression (PSD) via regulation of glutathione peroxidase 4 (GPX4)-mediated brain-derived neurotrophic factor (BDNF) expression.…

Control parameterization approach to time-delay optimal control problems: A survey Open

Di Wu, Yin Chen, Changjun Yu, Yanqin Bai, Kok Lay Teo · 2022

Control parameterization technique is an effective method to solve optimal control problems. It works by approximating the control function by piece-wise constant (or linear) function. In this way, the optimal control problems are approxim…

A new switching time optimization technique for multi-switching systems Open

Xi Zhu, Changjun Yu, Kok Lay Teo · 2022

For a multi-switching system, it consists of multiple parallel switching systems. The optimal control problem controlled by a multi-switching system is to determine the optimal time sequence for each of the parallel switching systems. The …

Effects of Wearing Face Masks on Exercise Capacity and Ventilatory Anaerobic Threshold in Healthy Subjects During the COVID-19 Epidemic Open

Qiang Lin, Yuxing Cai, Changjun Yu, Wei Gu, Yan Tan , et al. · 2022

BACKGROUND Face masks have become an important part of the COVID-19 prevention approach. This study aimed to explore the effect of wearing masks on exercise ability and ventilatory anaerobic threshold (VAT). MATERIAL AND METHODS Thirty-fou…

Solutions of Nonlinear Optimal Control Problems Using Quasilinearization and Fenchel Duality Open

Yi Li, Di Wu, Changjun Yu · 2022

In this paper, we consider a special class of nonlinear optimal control problems, where the control variables are box-constrained and the objective functional is strongly convex corresponding to control variables and separable with respect…

A duality-based approach for solving linear parabolic control constrained optimal control problems Open

Hailing Wang, Changjun Yu, Di Wu · 2022

This paper is concerned with the optimal control problem governed by a linear parabolic equation and subjected to box constraints on control variables. This type of problem has important applications in heating and cooling systems. By appl…

A new gradient computational formula for optimal control problems with time-delay Open

Changjun Yu, Lei Yuan, Shuxuan Su · 2021

In this paper, we consider a class of time-delay optimal control problem (TDOCP) with canonical equality and inequality constraints. By applying control parameterization method together with time-scaling transformation, a TDOCP can be read…

On the optimal control problems with characteristic time control constraints Open

Changjun Yu, Shuxuan Su, Yanqin Bai · 2021

In this paper, we consider a class of optimal control problems with control constraints on a set of characteristic time instants. By applying the control parameterization technique, these constraints are imposed on the subdomains that cont…

Robust Bi-Objective Optimal Control of Tungiasis Diseases Open

Wei Lv, Shi-Jia Zhuang, Changjun Yu · 2021

Large Scale, Multicenter, Prospective Study of Apatinib in Advanced Gastric Cancer: A Real-World Study from China [Corrigendum] Open

Wanren Peng, Fenglin Zhang, Zishu Wang, Dongliang Li, Yifu He , et al. · 2020

[This corrects the article DOI: 10.2147/CMAR.S249153.].

Minimizing almost smooth control variation in nonlinear optimal control problems Open

Ying Zhang, Changjun Yu, Yingtao Xu, Yanqin Bai · 2019

In this paper, we consider an optimal control problem in which the control is almost smooth and the state and control are subject to terminal state constraints and continuous state and control inequality constraints. By introducing an extr…

Construction of Open Virtual Experimental Platform for Communication Engineering Open

Aijun Liu, Bo Li, Changjun Yu, Xiao-zhen YAN · 2018

This paper points out the current problems in experimental teaching of communication engineering major in universities, expounds the significance of introducing open virtual experiment platform into experimental teaching, studies and analy…

Robust real-time optimization for blending operation of alumina production Open

Lingshuang Kong, Changjun Yu, Kok Lay Teo, Chunhua Yang · 2016

The blending operation is a key process in alumina production. The real-time optimization (RTO) of finding an optimal raw material proportioning is crucially important for achieving the desired quality of the product. However, the presence…

A new computational strategy for optimal control problem with a cost on changing control Open

Yujing Wang, Changjun Yu, Kok Lay Teo · 2016

© 2016 American Institute of Mathematical Sciences. All rights reserved.In this paper, we consider a class of optimal control problems where the cost function is the sum of the terminal cost, the integral cost and the full variation of con…

A Hybrid Time-Scaling Transformation for Time-Delay Optimal Control Problems Open

Changjun Yu, Qun Lin, Ryan Loxton, Kok Lay Teo, Guoqiang Wang · 2015

Changjun Yu YOU? Author Swipe