Zhen Wu

ORCID: 0000-0003-0758-9463
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About
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Research Areas
  • Stochastic processes and financial applications
  • Insurance, Mortality, Demography, Risk Management
  • Risk and Portfolio Optimization
  • Economic theories and models
  • Mathematical Biology Tumor Growth
  • Differential Equations and Numerical Methods
  • Advanced Mathematical Modeling in Engineering
  • Financial Risk and Volatility Modeling
  • Stability and Controllability of Differential Equations
  • Climate Change Policy and Economics
  • Stochastic processes and statistical mechanics
  • Nonlinear Differential Equations Analysis
  • Markov Chains and Monte Carlo Methods
  • Probabilistic and Robust Engineering Design
  • Complex Systems and Time Series Analysis
  • Stability and Control of Uncertain Systems
  • Probability and Risk Models
  • Advanced Thermodynamics and Statistical Mechanics
  • Optimization and Variational Analysis
  • Matrix Theory and Algorithms
  • Advanced Control Systems Optimization
  • Credit Risk and Financial Regulations
  • Fault Detection and Control Systems
  • Differential Equations and Boundary Problems
  • Aquatic and Environmental Studies

Beijing Tsinghua Chang Gung Hospital
2025

Tsinghua University
2025

Wenzhou Medical University
2025

Shandong University
2015-2024

South China University of Technology
2024

Yantai University
2023

Harbin Engineering University
2023

China Institute of Finance and Capital Markets
2018-2023

Shenyang Jianzhu University
2018

Loughborough University
2014

Existence and uniqueness results of fully coupled forward-backward stochastic differential equations with an arbitrarily large time duration are obtained. Some Hamilton systems arising in optimal control mathematical finance can be treated within our framework.

10.1137/s0363012996313549 article EN SIAM Journal on Control and Optimization 1999-01-01

In this paper, we study the well-posedness of Forward–Backward Stochastic Differential Equations (FBSDE) in a general non-Markovian framework. The main purpose is to find unified scheme which combines all existing methodology literature, and address some fundamental longstanding problems for FBSDEs. An important device decoupling random field that regular (uniformly Lipschitz its spatial variable). We show regulariy such closely related bounded solution an associated characteristic BSDE,...

10.1214/14-aap1046 article EN The Annals of Applied Probability 2015-05-21

In this paper, we study a partial information optimal control problem derived by forward-backward stochastic systems with correlated noises between the system and observation. Utilizing direct method, an approximation Malliavin derivative establish three versions of maximum principle (i.e., necessary condition) for control. To show their applications, work out two illustrative examples within frameworks linear-quadratic recursive utility then solve them via principles filtering.

10.1137/110846920 article EN SIAM Journal on Control and Optimization 2013-01-01

This paper studies a linear-quadratic optimal control problem derived by forward-backward stochastic differential equations, where the drift coefficient of observation equation is linear with respect to state $x$, and noise correlated noise, in sense that cross-variation nonzero. A backward separation approach introduced. Combining it variational method filtering, two optimality conditions feedback representation are derived. Closed-form solutions obtained some particular cases. As an...

10.1109/tac.2015.2411871 article EN IEEE Transactions on Automatic Control 2015-03-11

This paper introduces the backward mean-field (MF) linear-quadratic-Gaussian (LQG) games (for short, BMFLQG) of weakly coupled stochastic large-population system. In contrast to well-studied forward LQG games, individual state in our system follows differential equation (BSDE) whose terminal instead initial condition should be prescribed. Two classes BMFLQG are discussed here and their decentralized strategies derived through consistency condition. first class, agents dynamics full...

10.1109/tac.2016.2519501 article EN IEEE Transactions on Automatic Control 2016-01-19

We investigate the optimal control problems for backward doubly stochastic systems. As a necessary condition of we obtain maximum principle. found that deduced Hamiltonian system exactly corresponds to type time-symmetric forward-backward differential equations, which was first introduced by Peng and Shi [C. R. Math. Acad. Sci. Paris, 336 (2003), pp. 773–778]. Applying principle linear quadratic problems, unique control. The existence uniqueness solution is also obtained generalized...

10.1137/080743561 article EN SIAM Journal on Control and Optimization 2010-01-01

10.1016/j.jmaa.2007.12.072 article EN publisher-specific-oa Journal of Mathematical Analysis and Applications 2008-01-07

In this paper, we study one kind of stochastic recursive optimal control problem with the obstacle constraint for cost functional described by solution a reflected backward differential equation. We give dynamic programming principle and show that value function is unique viscosity corresponding Hamilton–Jacobi–Bellman

10.1137/060671917 article EN SIAM Journal on Control and Optimization 2008-01-01

This paper investigates the stabilization and control problems for linear continuous-time mean-field systems. Under standard assumptions, necessary sufficient conditions to stabilize systems in mean-square sense are explored first time. It is shown that, under assumption of exact detectability (exact observability), system stabilizable if only a coupled algebraic Riccati equation admits unique positive-semidefinite solution (positive-definite solution), which coincides with classical results...

10.1109/tac.2018.2881141 article EN IEEE Transactions on Automatic Control 2018-12-07

We discuss a quadratic criterion optimal control problem for stochastic linear system with delay in both state and variables. This will lead to kind of generalized forward‐backward differential equations (FBSDEs) Itô’s as forward anticipated backward equations. Especially, we present the feedback regulator time via new type Riccati also apply population problem.

10.1155/2012/835319 article EN cc-by Journal of Applied Mathematics 2012-01-01

We consider a stochastic optimal control problem of forward-backward system in which the variable consists two components: continuous and impulse control. The domain is assumed to be convex. Necessary optimality conditions Pontryagin maximum principle type are obtained for this problem. also give additional conditions, under necessary turn out sufficient.

10.1109/tac.2011.2114990 article EN IEEE Transactions on Automatic Control 2011-02-18

10.1016/j.insmatheco.2010.04.007 article EN Insurance Mathematics and Economics 2010-05-06

This paper is concerned with a new kind of Stackelberg differential game mean‐field backward stochastic equations (MF‐BSDEs). By means four Riccati (REs), the follower first solves LQ optimal control problem and gets corresponding open‐loop feedback representation. Then leader turns to solve an optimization for 1 × 2 forward‐backward system. In virtue some high‐dimensional complicated REs, we obtain equilibrium, it admits state Finally, as applications, class pension fund problems which can...

10.1155/2019/1798585 article EN cc-by Mathematical Problems in Engineering 2019-01-01

<p style='text-indent:20px;'>This paper is first concerned with one kind of discrete-time stochastic optimal control problem convex domains, for which necessary condition in the form Pontryagin's maximum principle and sufficient optimality are derived. The results then extended to two kinds games. Two illustrative examples studied, explicit strategies given. This establishes a rigorous version clear concise way paves road further related topics.</p>

10.3934/mcrf.2021031 article EN Mathematical Control and Related Fields 2021-06-30

Based on FreeStyle Libre, we designed QT AIR, an advanced real-time, calibrated Continuous Glucose Monitoring (CGM) device. This study aim to validate the consistency and clinical accuracy of product by comparing capillary blood glucose (CBG) with CGM data in both in-hospital outpatient scenarios. Results devices were compared random values from users settings. The CGMs was assessed through analysis, Bland-Altman calculation MARD MAD, Consensus Error Grids, as well analysis using Deviation...

10.3389/fendo.2025.1466358 article EN cc-by Frontiers in Endocrinology 2025-04-22
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