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Gut microbiota shifts in hepatitis B-related portal hypertension after transjugular intrahepatic portosystemic shunt:Mechanistic and clinical implications

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World Journal of Gastroenterology 2025年第3期31卷 134-137页

作者： Qi-Rong Jiang da-wu Zeng Department of Hepatology Hepatology Research InstituteThe First Affiliated HospitalFujian Medical UniversityFuzhou 350005Fujian ProvinceChina Department of Infectious Diseases The First Affiliated Hospital of Fujian Medical UniversityFuzhou 350004Fujian ProvinceChina

In this article,we provide commentary on the recent article by Zhao et *** focus on the shifts in the gut microbiota of patients with hepatitis B virus(HBV)-associated cirrhosis/portal hypertension(PH)following transjugular intrahepatic portosystemic shunt(TIPS)and the implications for understanding the mechanisms,diagnosis,and *** comparing the gut microbiota composition and dynamic changes before and after TIPS in patients with and without hepatic encephalopathy,the authors found an increase in non-probiotic bacteria in those who developed hepatic encephalopathy post-TIPS,with Morganella species present only in the hepatic encephalopathy *** gut microbiota changes post-TIPS among patients without the occurrence of hepatic encephalopathy suggest potential therapeutic benefits through prophylactic microbiome ***,the specific gut microbiota alterations may hold promise to predict the risk of hepatic encephalopathy in individuals undergoing TIPS for HBVrelated *** these promising findings,future studies are needed to address limitations,including a small sample size,a relatively short evaluation period for gut microbiota alterations,the absence of data on dynamic alterations in gut microbiota post-TIPS and their correlation with blood ammonia levels,and the lack of validation in animal *** conclusion,Zhao et al's study has shed new light on the link of gut microbiota with post-TIPS hepatic encephalopathy,potentially through the intricate gut-liver axis,and has important clinical implications for improving the management of patients with HBV-related PH.

关键词： Hepatitis B virus Cirrhosis Portal hypertension Hepatic encephalopathy Transjugular intrahepatic portosystemic shunt Gut microbiota

Scattering of Solitons of Modified KdV Equation with Self-consistent Sources

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Communications in Theoretical Physics 2008年第4期49卷 809-814页

作者： ZHANG da-Jun wu Hua Department of Mathematics Shanghai University Shanghai 200444 China

This paper investigates in detail the dynamics of the modified KdV equation with self-consistent sources, including characteristics of one-soliton, scattering conditions and phase shifts of two solitons, degenerate ca... 详细信息

关键词： modified kdV equation with self-consistent source soliton scattering

Reliable routing mechanism based on neighbor stability for MANET

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The Journal of China Universities of Posts and Telecommunications 2009年第3期16卷 33-39页

作者： wu da-peng wu Mu-qing ZHEN Yan Broadband Communication Networks Lab Beijing University of Posts and Telecommunications Beijing 100876 China

One critical issue for routing in mobile Ad-hoc networks （MANETs） is how to select a reliable path that can last longer because mobility may cause frequent breakdown in radio links. A novel routing mechanism based on link lifetime estimation is proposed in this article. In this mechanism, the node＇s received signal strength is obtained continuously by using Newton interpolation polynomial, and by method of middle value and interception, the reference points are selected to estimate the link lifetime. With the constraint of link lifetime and hop counts, the source nodes set up the route hop by hop. The simulations show that link lifetime can be predicted regardless of mobility pattern. Moreover, the route discovery times and packet drop ratio can be reduced by the proposed mechanism, and thus improving the performance of MANETs.

关键词： Ad-hoc networks routing protocol link lifetime received signal strength interpolation polynomial

Design and analysis of a scheme for the naval gun test shell entering the bore

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Defence Technology（防务技术） 2021年第4期17卷 1374-1386页

作者： Xin-yun Liu da-lin wu Jian Hou Shijiazhuang Campus Army Engineering UniversityShijiazhuang050003China Naval University of Engineering Wuhan430000China

The test shell without projectile belt is widely used in the teaching,inspection and maintenance of modern automatic naval *** order to ensure the normal work of each mechanism,it is very important to design the buffer and limit of the test shell during the process of entering the *** a certain type of medium caliber naval gun as the research object,the design of colloidal fluid damper and cartridge lock was proposed to ensure the reliability of entering the bore and closing the *** combining the simulation methods of computational fluid dynamics(CFD)and multibody system dynamic(MBD),it was analyzed whether the structural design can meet the engineering *** research results show that the colloidal fluid damper can dissipate a large amount of kinetic energy of the shell,and the cartridge lock can limit the rebound *** combination of the two ensures the smooth process of closing the *** research provides a design method for the process of the test shell entering the bore,and provides theoretical support for the feasibility of the method.

关键词： Naval gun Colloidal fluid damper Cartridge lock CFD MBD

A Note on Casoratian Solutions to Two-Dimensional Toda Lattice

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Communications in Theoretical Physics 2007年第3期47卷 390-392页

作者： ZHANG da-Jun wu Hua Department of Mathematics Shanghai University Shanghai 200444 China

In this short paper we generalize the conditions that Casoratian entries satisfy for the two-dlmenslonal Toda lattice. Although we finally conclude that our generalization is trivial in some sense for getting new solu... 详细信息

关键词： Casoratian solution two-dimensional Toda lattice bilinear

Three ultracold fermions in a two-dimensional anisotropic harmonic confinement

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Communications in Theoretical Physics 2022年第4期74卷 85-90页

作者： Yue Chen da-wu Xiao Peng Zhang Department of Physics Renmin University of ChinaBeijing 100872China Beijing Computational Science Research Center Beijing 100193China Department of Physics Centre for Quantum Coherenceand The Hong Kong Institute of Quantum Information Science and TechnologyThe Chinese University of Hong KongShatinNew TerritoriesHong KongChina

We calculate the energy spectrum of three identical fermionic ultracold atoms in two different internal states confined in a two-dimensional anisotropic harmonic *** the solutions of the corresponding two-body problems obtained in our previous work(Chen et al 2020 ***.A 101,053624),we derive the explicit transcendental equation for the eigen-energies,from which the energy spectrum is *** results can be used for the calculation of the 3rd Virial coefficients or the studies of few-body dynamics.

关键词： ultracold atom three-body problem two-dimensional system

Influence of Noise on Time Evolution of Intensity Correlation Function

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Communications in Theoretical Physics 2005年第5X期44卷 867-872页

作者： CHENG Qing-Hua CAO Li XU da Hai wu da-Jin School of Physical Science and Technology Yangtze University Jingzhou 434100 China State Key Laboratory of Laser Technology Huazhong University of Science and Technology Wuhan 430074 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China

Using the linear approximation method, we have studied how the correlation function C（t） of the laser intensity changes with time in the loss-noise model of the single-mode laser driven by the colored pump noise with signal modulation and the quantum noise with cross-correlation between the real and imaginary parts. We have found that when the pump noise self-correlation time T changes, （i） in the case of r 〈〈 1, the C（t） vs. t curve experiences a changing process from the monotonous descending to monotonous rise, and finally to the appearance of a maximum; （ii） in the case of r 〉〉 1, the curve only exhibits periodically surging with descending envelope. When r 〈〈 i and T does not change, with the increase of the pump noise intensity P, the curve experiences a repeated changing process, that is, from the monotonous descending to the appearance of a maximum, then to monotonous rise, and finally to the appearance of a maximum again. With the increase of the quantum noise intensity O,, the curve experiences a changing process from the monotonous rise to the appearance of a maximum, and finally to the monotonous descending. The increase of the quantum noise with cross-correlation between the real and imaginary parts will lead to the fall of the whole curve, but not affect the form of the time evolution of C（t）.

关键词： noise single-mode laser intensity correlation function

Effects of Correlated Noises on Statistic Property of Single-Mode Laser

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Chinese Physics Letters 1996年第8期13卷 583-586页

作者： WEI Xue-qin CAO Li wu da-jin National Laboratory of Laser Technology and Department of PhysicsHuazhong University of Science and TechnologyWuhan 430074 Department of Physics Huazhong University of Science and TechnologyWuhan 430074 CCAST(World Laboratory) P.O.Box 8730Beijing 100080

The loss-noise model with saturation effects driven by correlated additive and multiplicative white noise is *** analytical expression of the stationary probability distribution is *** mean,variance and skewness of the steady-state laser intensity are calculated *** have also found the correlated noises affect the statistic properties of laser ***,the laser intensity is locked at a fixed value when correlated parameterλis equal to-1.

关键词： noise intensity additive

Influence of Signal and Noise on Statistical Fluctuation of Single-Mode Laser System

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Communications in Theoretical Physics 2006年第5X期46卷 881-885页

作者： XU da-Hai CHENG Qing-Hua CAO Li wu da-Jin School of Physical Science and Technology Yangtze University Jingzhou 434104 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China

On the basis of calculating the steady-state mean normalized intensity fluctuation of a signal-mode laser system driven by both colored pump noise with signal modulation and the quantum noise with cross-correlation between its real and imaginary parts, we analyze the influence of modulation signal, noise, and its correlation form on the statistical fluctuation of the laser system. We have found that when the amplitude of modulation signal weakens and its frequency quickens, the statistical fluctuation will reduce rapidly. The by reducing the intensity of pump noise and quantum noise. statistical fluctuation of the laser system can be restrained Moreover, with prolonging of colored cross-correlation time, the statistical fluctuation of laser system experiences a repeated changing process, that is, from decreasing to augmenting, then to decreasing, and finally to augmenting again. With the decreasing of the value of cross-correlation coe~cient, the statistical fluctuation will decrease too. When the cross-correlation form between the real part and imaginary part of quantum noise is zero correlation, the statistical fluctuation of laser system has a minimum. Compared with the influence of intensity of pump noise, the influence of intensity of quantum noise on the statistical fluctuation is smaller.

关键词： signal noise single-mode laser the steady-state mean normalized intensity fluctuation