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Nomogram for overall survival in ampullary adenocarcinoma using the surveillance,epidemiology,and end results database and external validation

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World Journal of Clinical Oncology 2025年第2期16卷 36-51页

作者： Jia Yang Zi-Yi Wang Jing Chen yao zhang Lei Chen Department of Gastroenterology The First Affiliated Hospital of Army Medical UniversityChongqing 400038China Department of Epidemiology College of Preventive MedicineArmy Medical UniversityChongqing 400038China

BACKGROUND Ampullary adenocarcinoma is a rare malignant tumor of the gastrointestinal ***,only a few cases have been reported,resulting in limited information on *** To develop a dynamic nomogram using internal and external validation to predict survival in patients with ampullary *** Data were sourced from the surveillance,epidemiology,and end results stat *** patients in the database were randomized in a 7:3 ratio into training and validation *** Cox regression univariate and multivariate analyses in the training group,we identified independent risk factors for overall survival and cancer-specific survival to develop the *** nomogram was validated with a cohort of patients from the First Affiliated Hospital of the Army Medical *** For overall and cancer-specific survival,12(sex,age,race,lymph node ratio,tumor size,chemotherapy,surgical modality,T stage,tumor differentiation,brain metastasis,lung metastasis,and extension)and 6(age;surveillance,epidemiology,and end results stage;lymph node ratio;chemotherapy;surgical modality;and tumor differentiation)independent risk factors,respectively,were incorporated into the *** area under the curve values at 1,3,and 5 years,respectively,were 0.807,0.842,and 0.826 for overall survival and 0.816,0.835,and 0.841 for cancer-specific *** internal and external validation cohorts indicated good consistency of the *** The dynamic nomogram offers robust predictive efficacy for the overall and cancer-specific survival of ampullary adenocarcinoma.

关键词： Ampullary adenocarcinoma Dynamic nomogram Gastrointestinal tract Surveillance Epidemiology End results database Survival rate

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Combined control of fast attitude maneuver and stabilization for large complex spacecraft

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Acta Mechanica Sinica 2013年第6期29卷 875-882页

作者： yao zhang Jing-Rui zhang School of Aerospace Engineering Beijing Institute of Technology

In remote sensing or laser communication space missions, spacecraft need fast maneuver and fast stabilization in order to accomplish agile imaging and attitude tracking tasks. However, fast attitude maneuvers can easily cause elastic deformations and vibrations in flexible appendages of the spacecraft. This paper focuses on this problem and deals with the combined control of fast attitude maneuver and sta- bilization for large complex spacecraft. The mathematical model of complex spacecraft with flexible appendages and momentum bias actuators on board is presented. Based on the plant model and combined with the feedback controller, modal parameters of the closed-loop system are calculated, and a multiple mode input shaper utilizing the modal information is designed to suppress vibrations. Aiming at reducing vibrations excited by attitude maneuver, a quintic polynomial form rotation path planning is proposed with constraints on the actuators and the angular velocity taken into account. Attitude maneuver simulation results of the control systems with input shaper or path planning in loop are sepa- rately analyzed, and based on the analysis, a combined control strategy is presented with both path planning and input shaper in loop. Simulation results show that the combined control strategy satisfies the complex spacecraft＇s require- ment of fast maneuver and stabilization with the actuators＇ torque limitation satisfied at the same time.

关键词： Attitude control Input shaping Path planning Vibration suppression

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Method for multiple attribute decision making based on incomplete linguistic judgment matrix

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Journal of Systems Engineering and Electronics 2008年第2期19卷 298-303页

作者： zhang yao Fan Zhiping School of Business Administration Northeastern Univ. Shenyang 110004 P. R. China The Key Lab of National Education Ministry for Process Industry Automation Northeastern Univ. Shenyang 110004 P. R. China

With respect to the multiple attribute decision making problems with linguistic preference relations on alternatives in the form of incomplete linguistic judgment matrix, a method is proposed to analyze the decision problem. The incomplete linguistic judgment matrix is transformed into incomplete fuzzy judgment matrix and an optimization model is developed on the basis of incomplete fuzzy judgment matrix provided by the decision maker and the decision matrix to determine attribute weights by Lagrange multiplier method. Then the overall values of all alternatives are calculated to rank them. A numerical example is given to illustrate the feasibility and practicality of the proposed method.

关键词： multiple attribute decision making incomplete linguistic judgment matrix decision matrix optimization model alternative ranking.

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Application of MLPG in large deformation analysis

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Acta Mechanica Sinica 2006年第4期22卷 331-340页

作者： Xi zhang Zhenhan yao zhangfei zhang Department of Engineering Mechanics Tsinghua University Beijing 100084 China

Two-dimensional large deformation analysis of hyperelastic and elasto-plastic solids based on the Meshless Local Petrov-Galerkin method （MLPG） is presented. A material configuration based the nonlinear MLPG formulation is introduced for the large deformation analysis of both path-dependent and path-independent materials. The supports of the MLS approximation functions cover the same sets of nodes during material deformation, thus the shape function needs to be computed only in the initial stage. The multiplicative hyperelasto-plastic constitutive model is adopted to avoid objective time integration for stress update in large rota- tion. With this constitutive model, the computational formulations for path-dependent and path-independent materials become identical. Computational efficiency of the nonlinear MLPG method is discussed and optimized in several aspects to make the MLPG an O（N） algorithm. The numerical examples indicate that the MLPG method can solve large deformation problems accurately. Moreover, the MLPG computations enjoy better convergence rate than the FEM under very large particle distortion.

关键词： Meshless method MLPG. Large deformation Hyperelasticity Hyperelasto-plasticity

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Synthesis of Petri net supervisors enforcing general constraints

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第4期7卷 623-628页

作者： zhang yao-yao YAN Gang-feng School of Electrical Engineering Zhejiang University Hangzhou 310027 China

This paper deals with the synthesis of Petri net supervisor enforcing the more expressive constraints including marking terms, firing vector terms and Parikh vector terms. The method is developed to handle uncontrollable and unobservable transitions existing in the constraints. The “greater-than or equal” general constraints can also be transformed into “less-than or equal” Parikh constraints. An example is analyzed to show how the problem is solved. General constraint is first transformed into Parikh vector constraints, and Matrix-Transformation is proposed to obtain the admissible constraints without uncontrollable and unobservable transitions. Then the supervisor can be constructed based on constraints only consisting of Parikh vector terms. The method is proved to be more concise and effective than the method presented by Iordache and Moody especially when applied to large scale systems.

关键词： Petri net Supervisor control Parikh vector Uncontrollable Unobservable

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某混凝土筒仓结构设计研究

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山西建筑 2025年第2期51卷 37-43页

作者：张遥王建伟中冶京诚工程技术有限公司北京100176

圆形筒仓设计充分利用了薄壁筒壳结构的优越性,薄壁的配筋与受力、边缘效应、地震等因素有关,在设计过程中需要重点考虑。基于某实际工程案例,采用Midas Gen进行了整体建模计算,通过深仓贮料和浅仓贮料计算了筒仓侧壁的受力,并对各荷载... 详细信息

圆形筒仓设计充分利用了薄壁筒壳结构的优越性,薄壁的配筋与受力、边缘效应、地震等因素有关,在设计过程中需要重点考虑。基于某实际工程案例,采用Midas Gen进行了整体建模计算,通过深仓贮料和浅仓贮料计算了筒仓侧壁的受力,并对各荷载工况进行了分析。由于地震力对筒仓会产生较大影响,分析了不同地震工况下地震力的大小。在此基础上,贮料荷载对于仓壁的水平作用较为明显,通过荷载组合对筒仓侧壁进行设计研究。总结了侧壁配筋的控制因素,为筒仓设计提供帮助。

关键词：圆形筒仓深、浅仓模型有限元边缘效应

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Attribute augmentation-based label integration for crowdsourcing

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Frontiers of Computer Science 2023年第5期17卷 41-51页

作者： yao zhang Liangxiao JIANG Chaoqun LI School of Computer Science China University of GeosciencesWuhan 430074China School of Mathematics and Physics China University of GeosciencesWuhan 430074China

Crowdsourcing provides an effective and low-cost way to collect labels from crowd *** to the lack of professional knowledge,the quality of crowdsourced labels is relatively low.A common approach to addressing this issue is to collect multiple labels for each instance from different crowd workers and then a label integration method is used to infer its true ***,to our knowledge,almost all existing label integration methods merely make use of the original attribute information and do not pay attention to the quality of the multiple noisy label set of each *** solve these issues,this paper proposes a novel three-stage label integration method called attribute augmentation-based label integration(AALI).In the first stage,we design an attribute augmentation method to enrich the original attribute *** the second stage,we develop a filter to single out reliable instances with high-quality multiple noisy label *** the third stage,we use majority voting to initialize integrated labels of reliable instances and then use cross-validation to build multiple component classifiers on reliable instances to predict all *** results on simulated and real-world crowdsourced datasets demonstrate that AALI outperforms all the other stateof-the-art competitors.

关键词： crowdsourcing label integration attribute aug-mentation instance filtering

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Initial costates derived by near-optimal reference sequence and least-squares method

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Chinese Journal of Aeronautics 2024年第5期37卷 377-391页

作者： Shaozhao LU yao zhang Quan HU School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China

In this paper,we present a novel initial costates solver for initializing time-optimal trajectory problems in relative motion with continuous low *** proposed solver consists of two primary components:training a Multilayer Perceptron(MLP)for generating reference sequence and Time of Flight(TOF)to the target,and deriving a system of linear algebraic equations for obtaining the initial *** overcome the challenge of generating training samples for the MLP,the backward generation method is proposed to obtain five different training *** training database and sample form are determined by analyzing the input and output correlation using the Pearson correlation *** best-performing MLP is obtained by analyzing the training results with various hyper-parameter combinations.A reference sequence starting from the initial states is obtained by integrating forward with the near-optimal control vector from the output of ***,a system of linear algebraic equations for estimating the initial costates is derived using the reference sequence and the necessary conditions for *** results demonstrate that the proposed initial costates solver improves the convergence ratio and reduce the function calls of the shooting ***,Monte-Carlo simulation illustrates that the initial costates solver is applicable to different initial velocities,demonstrating excellent generalization ability.

关键词： Relative motion Expanding training database Multilayer perceptron Initial costates Least-squares method

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乡村振兴背景下乡镇企业会计人员业务素质提升研究

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江苏商论 2025年第1期 120-123页

作者：杜佳杉张瑶河北商贸学校河北石家庄050035

近年来,乡村振兴逐步成为中国发展新战略。乡镇企业对于提高农村地区居民收入、促进就业、助力乡村振兴具有积极作用。乡镇企业的发展离不开会计人员的参与。本文立足乡镇企业,通过研究会计人员业务素质现状及影响因素,为提升会计人员... 详细信息

近年来,乡村振兴逐步成为中国发展新战略。乡镇企业对于提高农村地区居民收入、促进就业、助力乡村振兴具有积极作用。乡镇企业的发展离不开会计人员的参与。本文立足乡镇企业,通过研究会计人员业务素质现状及影响因素,为提升会计人员业务素质做出建议。对于改善乡镇企业会计工作,提高乡村经济活力,发挥国家扶持农村政策,助力乡村振兴战略实施具有积极意义。

关键词：乡村振兴乡镇企业会计人员

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LOCAL ANALYSIS OF THE FULLY DISCRETE LOCAL DISCONTINUOUS GALERKIN METHOD FOR THE TIME-DEPENDENT SINGULARLY PERTURBED PROBLEM

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Journal of Computational Mathematics 2017年第3期35卷 265-288页

作者： yao Cheng Qiang zhang Department of Mathematics Nanjing University Nanjing 210093 Jiangsu Province China

In this paper we consider the fully discrete local discontinuous Galerkin method, where the third order explicit Runge-Kutta time marching is coupled. For the one-dimensional time-dependent singularly perturbed problem with a boundary layer, we shall prove that the resulted scheme is not only of good behavior at the local stability, but also has the double-optimal local error estimate. It is to say, the convergence rate is optimal in both space and time, and the width of the cut-off subdomain is also nearly optimal, if the boundary condition at each intermediate stage is given in a proper way. Numerical experiments are also given.

关键词： Local analysis Runge-Kutta method Local discontinuous Galerkin method,Singularly perturbed problem Boundary layer

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