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Laparoscopic liver resection utilizing the ventral avascular area of the inferior vena cava:A retrospective cohort study

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World Journal of Gastroenterology 2025年第1期31卷 42-57页

作者： Kun Huang Zhu Chen heng xiao Hai-Yang Hu Xing-Yu Chen Cheng-You Du Xiang Lan Department of Hepatobiliary Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400000China Department of General Surgery Mianyang Hospital of Traditional Chinese MedicineMianyang 621000Sichuan ProvinceChina

BACKGROUND Laparoscopic liver resection(LLR)can be challenging due to the difficulty of establishing a retrohepatic tunnel under *** the third hepatic hilum before parenchymal transection often leads to significant liver mobilization,tumor compression,and bleeding from the short hepatic veins(SHVs).This study introduces a novel technique utilizing the ventral avascular area of the inferior vena cava(IVC),allowing SHVs to be addressed after parenchymal transection,thereby reducing surgical complexity and improving outcomes in in situ *** To introduce and evaluate a novel LLR technique using the ventral avascular area of the IVC and compare its short-term outcomes with conventional *** The clinical cohort data of patients with pathologically confirmed hepatocellular carcinoma or intrahepatic cholangiocarcinoma who underwent conventional LLR and novel LLR between July 2021 and July 2023 at the First Affiliated Hospital of Chongqing Medical University were retrospectively *** novel LLR,we initially separated the caudate lobe from the IVC using dissecting forceps along the ventral avascular area of the ***,we transected the parenchyma of the left and right caudate lobes from the caudal side to the cephalic side using the avascular area as a ***,we addressed the SHVs and finally dissected the root of the right hepatic vein or left hepatic *** short-term postoperative outcomes and oncological results of the two approaches were evaluated and *** A total of 256 patients were included,with 150(58.59%)undergoing conventional LLR and 106(41.41%)undergoing novel *** novel technique resulted in significantly larger tumor resections(6.47±2.96 cm vs 4.01±2.33 cm,P<0.001),shorter operative times(199.57±60.37 minutes vs 262.33±83.90 minutes,P<0.001),less intraoperative blood loss(206.92±37.09 mL vs 363.34±131.27 mL,P<0.001),and greater resection volume(345.11±31.40 mL vs 264.38±31.98 mL,P<0.001)comp

关键词： Laparoscopic liver resection Inferior vena cava Retrohepatic tunnel Short hepatic veins Complex liver tumors Intraoperative bleeding control

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Deformable micro-continua in which quantum mysteries reside

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Applied Mathematics and Mechanics(English Edition) 2019年第12期40卷 1805-1830页

作者： heng xiao Shanghai Institute of Applied Mathematics & Mechanics College of Mechanics and Engineering Science Shanghai University College of Mechanics and Construction Engineering MOE Lab of Disaster Forecast and Control in Engineering Jinan University

Deformable micro-continua of highly localized nature are found to exactly exhibit all quantum effects commonly known for quantum entities at microscopic *** every instant,the spatial configuration of each such micro-continuum is prescribed by four spatial distributions of the mass,the velocity,the internal stress,and the intrinsic angular *** deformability features of such micro-continua in response to all configuration changes are identified with a constitutive equation that specifies how the internal stress responds to the mass density *** is shown that these microcontinua are endowed with the following unique response features:(i)the coupled system of the nonlinear field equations governing their dynamic responses to any given force and torque fields is exactly reducible to a linear dynamic equation governing a complex field variable;(ii)this fundamental dynamic equation and this complex field variable are just the Schrodinger equation and the complex wave function in quantum theory;and,accordingly,(iii)the latter two and all quantum effects known for quantum entities are in a natural and unified manner incorporated as the inherent response features of the micro-continua discovered,thus following objective and deterministic response patterns for quantum entities,in which the physical origins and meanings of the wave function and the Schrodinger equation become self-evident and,in particular,any probabilistic indeterminacy becomes irrelevant.

关键词： quantum entity micro-continuum Hencky strain-energy density nonlinear dynamic equation exact linearization Schrodinger equation deterministic pattern

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Notes on micro-continua exhibiting quantum effects

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Applied Mathematics and Mechanics(English Edition) 2020年第10期41卷 1597-1598页

作者： heng xiao College of Mechanics and Construction Engineering MOE Lab of Disaster Forecast and Control in EngineeringJinan UniversityGuangzhou 510632China

1 Uniqueness concerning exact linearization Most recently[1–2],the Schr¨odinger equation governing the quantum effects has been shown to be derivable as exact linearization from the following nonlinear field equatio... 详细信息

关键词： quantum exact linearization

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Quantum enigma hidden in continuum mechanics

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Applied Mathematics and Mechanics(English Edition) 2017年第1期38卷 39-56页

作者： heng xiao Shanghai Institute of Applied Mathematics and Mechanics Shanghai UniversityShanghai 200072China

It is reported that there exist deformable media which display quantum effects just as quantum entities do. As such, each quantum entity usually treated as a point particle may be represented by a deformable medium, the dynamic behavior of which is prescribed by four dynamic state variables, including mass density, velocity, internal pressure, and intrinsic angular momentum. In conjunction with the finding of the characteristic equation characterizing the physical nature of such media, it is found that a complex field quantity may be introduced to uncover a perhaps unexpected correlation, i.e., the governing dynamic equations for such media may be exactly reduced to the SchrSdinger equation, from which the closed-form solutions for all the four dynamic state variables can be obtained. It turns out that this complex field quantity is just the wavefunction in the SchrSdinger equation. Moreover, the dynamic effects peculiar to spin are derivable as direct consequences. It appears that these results provide a missing link in quantum theory, in the sense of disclosing the physical origin and nature of both the wavefunction and the wave equation. Now, the inherent indeterminacy in quantum theory may be rendered irrelevant. The consequences are explained for certain long-standing fundamental issues.

关键词： quantum entity deformable medium nonlinear dynamic equation new interpretation Schr¨odinger equation

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Preface:Frontiers and current applications in elasticity

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Acta Mechanica Sinica 2015年第5期31卷 599-600页

作者： heng xiao The State Key Laboratory for Special Advanced Steels (Shanghai University) Shanghai Institute of Applied Mathematics and MechanicsShanghai University

The elasticity,viz.,the deformation recoverability without energy dissipation,is known as a basic aspect in various deformation behaviors of solid *** examples are small and large elastic deformations characteristic o... 详细信息

关键词： elasticity solids dissipation thematic formulation exact contributions pioneering opportunity editor

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Farm size and fertilizer sustainable use: An empirical study in Jiangsu, China

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Journal of Integrative Agriculture 2019年第12期18卷 2898-2909页

作者： HU Ling-xiao ZHANG xiao-heng ZHOU Ying-heng China Institute for Rural Studies Tsinghua UniversityBeijing 100084P.R.China College of Economics and Management Huazhong Agricultural UniversityWuhan 430070P.R.China School of Economics Jiangxi University of Finance and EconomicsNanchang 330013P.R.China

Inefficient use of fertilizer has caused serious environmental problems and unsustainable development of agriculture in *** meet the increasing food demand in the future without damaging the ecological environment,Chinese government officially launched the Action Plan for the Zero Growth of Fertilizer Use in *** the same time,China released a series of policies aiming explicitly at expanding farm size and a great number of large scale farmers emerged ***,whether the expansion of farm size will be beneficial for the increase of fertilizer use efficiency still remains to be *** this study,we comprehensively explored the relationship between fertilizer use efficiency and farm *** on the 4281 farm households’survey data collected by the National Development and Reform Commission(NDRC)of China from 2004 to 2016 in Jiangsu Province,China,this paper applies a stochastic frontier production function to estimate fertilizer use efficiency across farm size and uses a regression model to analyze the influence of farm size on fertilizer use *** results show that:(1)the average fertilizer use efficiency of whole samples was only 0.60,much lower than the average technical efficiency,indicating that on average half of the fertilizer utilized are excessive in China;and(2)the smallest farm size group get the highest fertilizer use efficiency *** also provide some possible explanations for the inverse relationship between farm size and fertilizer use efficiency.

关键词： fertilizer use efficiency farm size China's rice production

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Seeing permeability from images： fast prediction with convolutional neural networks

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Science Bulletin 2018年第18期63卷 1215-1222页

作者： Jinlong Wu xiaolong Yin heng xiao Kevin T. Crofton Department of Aerospace and Ocean Engineering. Virginia Tech. Blacksburg VA 24060 USA Department of Petroleum Engineering Colorado School of Mines. Golden CO 80401 USA

Fast prediction of permeability directly from images enabled by image recognition neural networks is a novel pore-scale modeling method that has a great potential. This article presents a framework that includes (1) generation of porous media samples,(2) computation of permeability via fluid dynamics simulations,(3) training of convolutional neural networks (CNN) with simulated data, and (4) validations against simulations. Comparison of machine learning results and the ground truths suggests excellent predictive performance across a wide range of porosities and pore geometries, especially for those with dilated pores. Owning to such heterogeneity, the permeability cannot be estimated using the conventional Kozeny–Carman approach. Computational time was reduced by several orders of magnitude compared to fluid dynamic simulations. We found that, by including physical parameters that are known to affect permeability into the neural network, the physics-informed CNN generated better results than regular CNN. However, improvements vary with implemented heterogeneity.

关键词： Porous media Convolutional neural network Machine learning Permeability Image processing

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New finite strain elastoplastic equations for accurately and explicitly simulating pseudoelastic-to-plastic transition effects of shape memory alloys

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Applied Mathematics and Mechanics(English Edition) 2020年第10期41卷 1583-1596页

作者： Siyu WANG Lin ZHAN Huifeng XI heng xiao School of Mechanics and Construction Engineering MOE Key Lab of Disaster Forecast and Control in EngineeringJinan University601 West Huangpu AvenueGuangzhou 510632China Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China

A new finite strain elatoplastic J2-flow model with coupling effects of both isotropic and anisotropic hardening is proposed with the co-rotational logarithmic *** terms of certain single-variable shape functions representing uniaxial loading and unloading curves,explicit multi-axial expressions for the three hardening quantities incorporated in the new model proposed are derived in unified forms for the purpose of automatically and accurately simulating complex pseudoelastic-to-plastic transition effects of shape memory alloys(SMAs)under multiple loading-unloading *** examples show that with only a single parameter of direct physical meaning for each cycle,accurate and explicit simulations may be achieved for extensive data from multiple cycle tests.

关键词： shape memory alloy(SMA) finite deformation pseudo-elasticity plasticity cyclic loading transition effect elastoplastic equation explicit and accurate approach

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Algorithms in a Robust Hybrid CFD-DEM Solver for Particle-Laden Flows

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Communications in Computational Physics 2011年第2期9卷 297-323页

作者： heng xiao Jin Sun Institute of Fluid Dynamics ETH Zürich8092 ZürichSwitzerland Institute for Infrastructure and Environment The University of EdinburghEdinburgh EH93JLUnited Kingdom

A robust and efficient solver coupling computational fluid dynamics(CFD)with discrete element method(DEM)is developed to simulate particle-laden flows in various physical *** interpolation algorithm suitable for unstructured meshes is proposed to translate between mesh-based Eulerian fields and particle-based Lagrangian *** interpolation scheme reduces the mesh-dependence of the averaging and interpolation *** addition,the fluid-particle interaction terms are treated semi-implicitly in this algorithm to improve stability and to maintain ***,it is demonstrated that sub-stepping is desirable for fluid-particle systems with small Stokes numbers.A momentum-conserving sub-stepping technique is introduced into the fluid-particle coupling procedure,so that problems with a wide range of time scales can be solved without resorting to excessively small time steps in the CFD *** numerical examples are presented to demonstrate the capabilities of the solver and the merits of the algorithm.

关键词： Fluid-particle interaction particle-laden flow discrete element method computational fluid dynamics hybrid model

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EVM simulation and analysis in digital transmitter

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The Journal of China Universities of Posts and Telecommunications 2009年第6期16卷 43-48页

作者： TAN xiao-heng LI Teng-jiao College of Communication Engineering Chongqing University Chongqing 400044 China

The error vector magnitude（EVM） is extensively applied as a metric for digital transmitter signal quality compliance in modern communication *** article is focused on the effects of local oscillator（LO） phase noise and nonlinear distortion of power amplifier on *** article contributes to below ***,the relationships between EVM and two effects,LO phase noise and nonlinear distortion of power amplifier,are derived and ***,to simplify the expression,the third-order intermodulation distortion（IMD3） is used to calculate the ***,an expression for the EVM is derived based on the digital transmitter model that considers local oscillator phase noise and nonlinear distortion of power ***,the math formula of bit error rate（BER） versus EVM is given which can be easier and more useful to predict BER,according to analysis of the relationship between EVM and signal to noise rate（SNR）,inspired by the works of Rishad,*** and AHM,*** are carried out to display the performance of EVM based on these relationships.

关键词： power amplifiers EVM phase noise nonlinear distortion IMD3

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