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Search Results: 1 - 10 of 4663 matches for " Jinghao Duan "
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High-Resolution Micro-CT for Morphologic and Quantitative Assessment of the Sinusoid in Human Cavernous Hemangioma of the Liver
Jinghao Duan, Chunhong Hu, Hua Chen
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0053507
Abstract: Hepatic sinusoid plays a vital role in human cavernous hemangioma of the liver (CHL), and its morphologic investigation facilitates the understanding of microcirculation mechanism and pathological change of CHL. However, precise anatomical view of the hepatic sinusoid has been limited by the resolution and contrast available from existing imaging techniques. While liver biopsy has traditionally been the reliable method for the assessment of hepatic sinusoids, the invasiveness and sampling error are its inherent limitations. In this study, imaging of CHL samples was performed using in-line phase-contrast imaging (ILPCI) technique with synchrotron radiation. ILPCI allowed clear visualization of soft tissues and revealed structural details that were invisible to conventional radiography. Combining the computed tomography (CT) technique, ILPCI-CT was used to acquire the high-resolution micro-CT images of CHL, and three dimensional (3D) microstructures of hepatic sinusoids were provided for the morphologic depiction and quantitative assessment. Our study demonstrated that ILPCI-CT could substantially improve the radiographic contrast of CHL tissues in vitro with no contrast agent. ILPCI-CT yielded high-resolution micro-CT image of CHL sample at the micron scale, corresponding to information on actual structures revealed at histological section. The 3D visualization provided an excellent view of the hepatic sinusoid. The accurate view of individual hepatic sinusoid was achieved. The valuable morphological parameters of hepatic sinusoids, such as thrombi, diameters, surface areas and volumes, were measured. These parameters were of great importance in the evaluation of CHL, and they provided quantitative descriptors that characterized anatomical properties and pathological features of hepatic sinusoids. The results highlight the high degree of sensitivity of the ILPCI-CT technique and demonstrate the feasibility of accurate visualization of hepatic sinusoids. Moreover, there is a correlation between the CHL and the size or morphology of hepatic sinusoids, which offers a potential use in noninvasive study and analysis of CHL.
Global Optimization for Solving Linear Non-Quadratic Optimal Control Problems  [PDF]
Jinghao Zhu
Journal of Applied Mathematics and Physics (JAMP) , 2016, DOI: 10.4236/jamp.2016.410188
Abstract: This paper presents a global optimization approach to solving linear non-quadratic optimal control problems. The main work is to construct a differential flow for finding a global minimizer of the Hamiltonian function over a Euclid space. With the Pontryagin principle, the optimal control is characterized by a function of the adjoint variable and is obtained by solving a Hamiltonian differential boundary value problem. For computing an optimal control, an algorithm for numerical practice is given with the description of an example.
Microcomputed Tomography with Diffraction-Enhanced Imaging for Morphologic Characterization and Quantitative Evaluation of Microvessel of Hepatic Fibrosis in Rats
Jinghao Duan, Chunhong Hu, Shuqian Luo, Xinyan Zhao, Tailing Wang
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0078176
Abstract: Backgroud Hepatic fibrosis can lead to deformation of vessel morphology and structure. In the present feasibility study, high-resolution computed tomography (CT) using diffraction-enhanced imaging (DEI) was used to represent three-dimensional (3D) vessel microstructures of hepatic fibrosis in rats and to differentiate different stages of hepatic fibrosis using qualitative descriptions and quantitative measurement of microvessels. Material and Methods Three typical specimens at different stages, i.e., mild, moderate and severe hepatic fibrosis, were imaged using DEI at 15 keV without contrast agents. The correspondence between DEI-CT images and histopathological findings was determined. The 3D visualizations from different stages of hepatic fibrosis were presented using DEI-CT. Additionally, Qualitative descriptions and quantitative evaluation of vessel features, such as vessel trend, vascular distortion deformation, thrombus formation and texture features on the inner wall of the vessel, were performed. Results DEI-CT produced high-resolution images of the vessel microstructures in hepatic fibrosis that corresponded to information on actual structures observed from the histological sections. Combined with the 3D visualization technique, DEI-CT enabled the acquisition of an accurate description of the 3D vessel morphology from different stages of hepatic fibrosis. Qualitative descriptions and quantitative assessment of microvessels demonstrated clear differences between the different stages of hepatic fibrosis. The thrombus inside the vessel of severe liver fibrosis was accurately displayed, and corresponding analysis can provide an exact measurement of vessel stenosis rate. Conclusions DEI-CT may allow morphologic descriptions and quantitative evaluation of vessel microstructures from different stages of hepatic fibrosis and can better characterize the various stages of fibrosis progression using high-resolution 3D vessel morphology.
Pluralism, Vitality, and Transformability: A Case Study of Jining Religions in the Late Imperial and Republican Periods
Jinghao Sun
Asian Culture and History , 2012, DOI: 10.5539/ach.v4n2p16
Abstract: This article depicts the dynamic demonstrations of religions in late imperial and republican Jining. It argues with evidences that the open, tolerant and advanced urban circumstances and atmosphere nurtured the diversity and prosperity of formal religions in Jining in much of the Ming and Qing periods. It also argues that the same air and ethos enabled Jining to less difficultly adapt to the West-led modern epoch, with a notable result of welcoming Christianity, quite exceptional in hinterland China.
Destruction, Survival and Renewal: Jining’s Urban Identity in the Political and Social Storms, 1937-2003
Jinghao Sun
Asian Social Science , 2010, DOI: 10.5539/ass.v6n10p25
Abstract: This article explores the recent experience of a once prosperous late imperial Chinese city from the Japanese occupation to the post-Mao reformist era. It focuses on the effect of the drastically changing political and social environments on the city’s identity, and how the city responded to the challenges. Over the last seven decades, Jining suffered, survived, restored and transformed like other places in China, whereas yet from its trajectory we can still see its distinctive individual characteristics. The article reveals the deterioration of its late imperial legacy and the destruction of its new “Westernizing” identity from the late 1930s to the late 1970s, while it also shows a seeming return of the city’s certain traditions in the following post-Mao New Era though not where all positive.
Purity Results on $F$-crystals
Jinghao Li
Mathematics , 2014,
Abstract: For an $F^n$-crystal $\mathfrak C$ over a reduced locally Noetherian $\mathbb F_p$-scheme $S$, Vasiu first obtained the purity of the Newton polygon strata of $S$ defined by $\mathfrak C$. Deligne later obtained the purity of the $p$-rank strata of $S$ defined by $\mathfrak C$. We prove a stronger result that for every fixed point $P_0$ in the $xy$-coordinate plane, the reduced locally closed subscheme $S_{P_0}=\{s\in S| NP(\mathfrak C_s)\mbox{ has }P_0\mbox{ as a break point}\}$ of $S$ is pure in $S$ (A weaker result was known for the weak purity of $S_{p_0}$).
An approximation to discrete optimal feedback controls
Jinghao Zhu,Zhiqiang Zou
International Journal of Mathematics and Mathematical Sciences , 2003, DOI: 10.1155/s0161171203211042
Abstract: We study discrete solutions of nonlinear optimal control problems. By value functions, we construct difference equations to approximate the optimal control on each interval of “small” time. We aim to find a discrete optimal feedback control. An algorithm is proposed for computing the solution of the optimal control problem.
Solution to an Optimal Control Problem via Canonical Dual Method
Jinghao Zhu,Jiani Zhou
Journal of Control Science and Engineering , 2009, DOI: 10.1155/2009/202094
Abstract: The analytic solution to an optimal control problem is investigated using the canonical dual method. By means of the Pontryagin principle and a transformation of the cost functional, the optimal control of a nonconvex problem is obtained. It turns out that the optimal control can be expressed by the costate via canonical dual variables. Some examples are illustrated.
Convergence Theorems for Common Fixed Points of Nonself Asymptotically Quasi-Non-Expansive Mappings
Chao Wang,Jinghao Zhu
Fixed Point Theory and Applications , 2008, DOI: 10.1155/2008/428241
Abstract: We introduce a new three-step iterative scheme with errors. Several convergence theorems of this scheme are established for common fixed points of nonself asymptotically quasi-non-expansive mappings in real uniformly convex Banach spaces. Our theorems improve and generalize recent known results in the literature.
Convergence Theorems for Common Fixed Points of Nonself Asymptotically Quasi-Non-Expansive Mappings
Wang Chao,Zhu Jinghao
Fixed Point Theory and Applications , 2008,
Abstract: We introduce a new three-step iterative scheme with errors. Several convergence theorems of this scheme are established for common fixed points of nonself asymptotically quasi-non-expansive mappings in real uniformly convex Banach spaces. Our theorems improve and generalize recent known results in the literature.
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