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Comparative analysis of the short and medium-term efficacy of the Da Vinci robot versus laparoscopic total mesangectomy for rectal cancer

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1681-1690页

作者： wei-ge gao Wen Shi Xu-Chen Gong Zhi-Wen Li Yiminjiang Tuoheti Department of Anorectal Surgery People’s Hospital of Xinjiang Uygur Autonomous RegionUrumqi 830001Xinjiang Uygur Autonomous RegionChina Department of Anus and Intestine Surgery Cancer Hospital of Chinese Academy of Medical SciencesBeijing 100084China

BACKGROUND The Da Vinci robot-assisted surgery technique has been widely used in laparo-scopic mesangectomy for rectal ***,the short-term efficacy of these procedures compared to traditional laparoscopic surgery remains *** purpose of this study was to compare and analyze the short-and medium-term efficacy of Da Vinci robot and laparoscopic surgery in total mesangectomy(TME)for rectal cancer,so as to provide guidance and reference for clinical *** To investigate the safety and long-term efficacy of robotic and laparoscopic total mesorectal resection for the treatment of rectal *** The clinicopathologic data of 240 patients who underwent TME for rectal cancer in the Anorectal Department of People’s Hospital of Xinjiang Uygur Autonomous Region from August 2018 to March 2023 were retrospectively *** them,112 patients underwent laparoscopic TME(L-TME)group,and 128 patients underwent robotic TME(R-TME)*** intraoperative,postoperative,and follow-up conditions of the two groups were *** The conversion rate of the L-TME group was greater than that of the R-TME group(5.4%vs 0.8%,χ^(2)=4.417,P=0.036).The complication rate of the L-TME group was greater than that of the R-TME group(32.1%vs 17.2%,χ^(2)=7.290,P=0.007).The percentage of positive annular margins in the L-TME group was greater than that in the R-TME group(7.1%vs 1.6%,χ^(2)=4.658,P=0.031).The 3-year disease-free survival(DFS)rate and overall survival(OS)rate of the L-TME group were lower than those of the R-TME group(74.1%vs 85.2%,χ^(2)=4.962,P=0.026;81.3%vs 91.4%,χ^(2)=5.494,P=0.019);in patients with American Joint Committee on Cancer stage Ⅲ DFS rate and OS rate in the L-TME group were significantly lower than those in the R-TME group(52.5%vs 76.1%,χ^(2)=5.799,P=0.016;65.0%vs 84.8%,χ^(2)=4.787,P=0.029).CONCLUSION Compared with the L-TME group,the R-TME group had a better tumor prognosis and was more favorable for patients with rectal cancer

关键词： Rectal tumor Robots Laparoscopy Total mesangectomy Survival prognosis Retrospective analysis

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Relative Superlinearity Implies Infinitely Many Solutions to Sturm-Liouville BVPs with Laplacian Type Operators

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Acta Mathematica Sinica,English Series 2005年第5期21卷 1015-1026页

作者： wei gao ge wei Ping SUN Department of Applied Mathematics Beijing Institute of Technology Beijing 100081 P. R. China

By the use of continuation theorems and the duality principle it＇s proved that for both homogeneous and nonhomogeneous Sturm-Liouville boundary value problems with Laplacian type operators, relative superlinearity im... 详细信息

关键词： p-Laplacian-like operator periodic solutions degree

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A Priori Bounds for Periodic Solutions of a Kind of Second Order Neutral Functional Differential Equation with Multiple Deviating Arguments

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Acta Mathematica Sinica,English Series 2005年第6期21卷 1309-1314页

作者： Shi Ping LU wei gao ge Department of Mathematics Anhui Normal University Wuhu 241000 P. R. China Department of Applied Mathematics Beijing Institute of Technology Beijing 100081 P. R. China

Thc main aim of this paper is to use the continuation theorem of coincidence degree theory for studying the existence of periodic solutions to a kind of neutral functional differential equation as follows：（x（t）-^n∑i=1cix（t-ri））″=f（x（t））x′＋g（x（t-τ））＋p（t）.In order to do so, we analyze the structure of the linear difference operator A ： C2π→C2π, [Ax]（t） =x（t）-∑^ni=1cix（t-ri）to determine some flmdamental properties first, which we are going to use throughout this paper. Meanwhile, we also prove some new inequalities which are useful for estimating a priori bounds of periodie solutions.

关键词： Periodic solution Continuation theorem Neutral functional differential equation

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Existence of Positive Solutions to Fourth Order Quasilinear Boundary Value Problems

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1825-1830页

作者： Zhan Bing BAI wei gao ge Institute of Mathematics Shandong University of Science and Technology Qingdao 266510 P.R. China Department of Applied Mathematics Beijing Institute of Technology Beijing 100081 P.R. China

In this paper, we generalize the fixed point theorem of cone expansion and compression of norm type to the theorem of functional type. As an application, the existence of positive solutions for some fourth-order beam equation boundary value problems is obtained. The emphasis is put on that the nonlinear term is dependent on all lower order derivatives.

关键词： fourth-order boundary value problem fixed point theorem positive solution

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Multiple Periodic Solutions of Differential Delay Equations with 2k-1 Lags

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Acta Mathematicae Applicatae Sinica 2020年第2期36卷 390-400页

作者： Lin LI Hua-fei SUN wei-gao ge School of Mathematics and Statistics Beijing Institute of TechnologyBeijing 100081China

In this paper,we study the periodic solutions to a type of differential delay equations with 2 k-1 *** 4 k-periodic solutions are obtained by using the variational method and the method of Kaplan-Yorke coupling *** is a new type of differential delay equations compared with all the previous *** this paper provides a theoretical basis for the study of differential delay *** example is given to demonstrate our main results.

关键词： differential delay equation periodic solutions critical point theory variational method

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Periodic Solutions to a Kind of Second Order Neutral Functional Differential Equation in the Critical Case

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Acta Mathematica Sinica,English Series 2005年第5期21卷 1149-1158页

作者： Shi Ping LU wei gao ge Zu Xiu ZHENG Department of Mathematics Anhui Normal University Wuhu 241000 P. R. China Department of Applied Mathematics Beijing Institute of Technology Beijing 100081 P. R. China Department of Mathematics Anhui University Hefei 230039 P. R. China

In this paper, the authors consider the existence of periodic solutions for a kind of second neutral functional differential equation as follows：（x（t） - cx（t -τ）＂ = g（t, x（t - μ（t）））＋ e（t）,in the critical case ｜c｜ = 1. By employing Mawhin＇s continuation theorem and some analysis techniques, some new results are obtained.

关键词： Periodic solution Mawhin's continuation theorem Neutral functional differential equation in the critical case

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Existence of Positive Solutions for Boundary Value Problems on the Semi-infinite Interval

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Chinese Quarterly Journal of Mathematics 2005年第4期20卷 380-384页

作者： NI Xiao-hong ge wei-gao Department of Mathematics Huzhou Teacher＇s College Huzhou 313000 China

In this paper, the authors study the existence of positive solution of the following BVP {1/p（t）（P（t）x′）′＋f（t,x（t）,p（t）x′（t））=0,o〈t〈＋∞ αx（0）-βlimt→0p（t）x′（t）=0,γ limt→＋∞x（t）＋δlimt→＋∞p（t）x′（t）=0 on the semi-infinite interval. By considering characterization of the nonlinearity, they obtain some new existence results.

关键词： Sturm-Liouville boundary value problem positive solution fixed point

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Flow Field Simulation and Parameter Analysis of Hydraulic Unbalanced Bionic Self-recovery Actuator for Rotary Equipment

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Journal of Bionic Engineering 2024年第1期21卷 325-343页

作者： wei Li Xin Pan Dehong ge Jinji gao Key Laboratory of Engine Health Monitoring-Control and Networking of Ministry of Education Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of High-End Mechanical Equipment Health Monitoring and Self-Recovery Beijing University of Chemical TechnologyBeijing 100029China

The rotor is the most important component of rotating machinery,and the vibration produced by its mass unbalance has a serious influence on the secure and steady operation of the machine,so an effective online suppression technology is urgently needed.A new hydraulic unbalanced bionic self-recovery system is introduced,imitating the way of manually repairing faulty *** accomplish the effect of actuator mass redistribution,the technology employs pressurized air to drive the quantitative transfer of liquid in the reservoir cavity at opposite *** can complete the online adjustment of the equipment's balancing state and suppress the unbalanced vibration of equipment in real time,which gives the equipment the ability to maintain an autonomous health state and improve equipment *** composition and working principle of the system are introduced in detail,and the key performance parameters,such as the minimum running speed and the balancing liquid transfer speed,are analyzed *** fluid-solid coupling model of the actuator was established,and the two-phase flow from inside the hydraulic unbalanced bionic self-recovery actuator was simulated under multiple working conditions and the performance parameters were quantitatively analyzed.A balancing simulation test bed was built,and its effectiveness was verified by performance parameter tests and unbalanced bionic self-recovery *** experimental results show that the mass distribution adjustment of the balancing disk can be achieved using different viscosity balancing liquid,and the response of liquid viscosity 10 cSt is faster than that of liquid viscosity 100 cSt in the process of balancing liquid transfer,and the time is reduced by more than 75%;the system can reduce the simulated rotor amplitude from 18.3μm to 10.6μm online in real time,which provides technical support for the subsequent development of a new generation of bionic intelligent equipment.

关键词： Engineering self-recovery-Bionics Simulation analysis Self-recovery regulation

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Existence of Three Positive Solutions for Quasi-linear Boundary Value Problem

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Acta Mathematicae Applicatae Sinica 2005年第3期21卷 353-358页

作者： Jing-li Ren wei-gao ge Bao-xian Ren Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080China Department of Mathematics Zhengzhou University Zhengzhou 450052China Department of Mathematics. Beijing Institute of Technology Beijing 100081 China Department of Computer Science Anyang Normal College Anyang 455000 China

In this paper, we prove a new fixed point theorem in cones and obtain the existence of triple positive solutions for a class of quasi-linear three-point boundary value problems.

关键词： Quasi-linear three-point boundary value problem positive solution

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Positive Solution of Multi-Point Boundary Value Problems for the One-Dimensional p-Laplacian with Singularities

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Acta Mathematicae Applicatae Sinica 2005年第4期21卷 661-670页

作者： De-xiang Ma wei-gao ge Xue-gang Chen College of Information Science and Engineering Shandong University of Science and Technology QingdaoShandong Province 266510 China Department of Mathematics Beijing Institute of Technology Beijing 100081 China

In this paper, we obtain positive solution to the following multi-point singular boundary value problem with p-Laplacian operator,{（ φp（u＇））＇＋q（t）f（t,u,u＇）=0,0〈t〈1,u（0）=∑i=1^nαiu（ξi）,u＇（1）=∑i=1^nβiu＇（ξi）,whereφp（s）=｜s｜^p-2s,p≥2;ξi∈（0,1）（i=1,2,…,n）,0≤αi,βi〈1（i=1,2,…n）,0≤∑i=1^nαi,∑i=1^nβi〈1,and q（t） may be singular at t=0,1,f（t,u,u＇）may be singular at u＇=0

关键词： Singularity positive solution p-Laplacian

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