Optimization study of station track utilization in high-speed railroad based on constraints of control in random origin and process

Purpose-The purpose of this paper is to eliminate the fluctuations in train arrival and departure times caused by skewed distributions in interval operation times.These fluctuations arise from random origin and process factors during interval operations and can accumulate over multiple intervals.The aim is to enhance the robustness of high-speed rail station arrival and departure track utilization schemes.Design/methodologylapproach-To achieve this objective,the paper simulates actual train operations,incorporating the fluctuations in interval operation times into the utilization of arrival and departure tracks at the station.The Monte Carlo simulation method is adopted to solve this problem.This approach transforms a nonlinear model,which includes constraints from probability distribution functions and is difficult to solve directly,into a linear programming model that is easier to handle.The method then linearly weights two objectives to optimize the solution.Findings-Through the application of Monte Carlo simulation,the study successfully converts the complex nonlinear model with probability distribution function constraints into a manageable linear programming model.By continuously adjusting the weighting coefficients of the linear objectives,the method is able to optimize the Pareto solution.Notably,this approach does not require extensive scene data to obtain a satisfactory Pareto solution set.Originality/value-The paper contributes to the field by introducing a novel method for optimizing high-speed rail station arrival and departure track utilization in the presence of fluctuations in interval operation times.The use of Monte Carlo simulation to transform the problem into a tractable linear programming model represents a significant advancement.Furthermore,the method's ability to produce satisfactory Pareto solutions without relying on extensive data sets adds to its practical value and applicability in real-world scenarios.

Effect of Storage Conditions on the Sensory Quality, Colour and Texture of Fresh-Cut Minimally Processed Cabbage with the Addition of Ascorbic Acid, Citric Acid and Calcium Chloride

The aim of this study was to investigate the effect of storage conditions on the sensory quality, colour and texture of fresh-cut cabbage during the addition of ascorbic acid, citric acid and calcium chloride. Ascorbic acid maintained the overall quality for 14 days at 0℃ and 7 days at 5℃;no difference, however, was observed regarding browning of cut surface compared to the control sample at both storage temperatures. Calcium chloride maintained the overall quality and cut surface browning for 14 days at both storage temperatures. It was also found that citric acid 1% can be used for minimally processed cabbage. Soaking with citric acid helped retain the color and increased the overall acceptance and organoleptic quality of fresh cut cabbage;it reduced browning of the cut surface and protected against formation of black specks. Citric acid treatment combined with low temperature storage (0℃) prolonged the shelf life of minimally processed cabbage for 22 days, time sufficient for acceptable marketing of the product. The lightness of minimally processed cabbage decreased linearly from 70.94 ± 6 to 63.8 ± 8.5 - 61.3 ± 8 units for the chemical treatments during 22 days of storage at 0℃. Hue angle values during storage time were also significantly influenced by chemical treatments mainly at 0℃.

Optimization of Preservation on Fresh-cut Yam under Simulated Cold-chain Process

[Objectives]This study was conducted to investigate the effect of compound fresh-keeping liquid on the browning and quality of fresh-cut yam during the cold chain process.[Methods]Under the simulated cold chain condition of 4℃,a uniform design(U6*(64))experiment was carried out to optimize the compound preservative formula,and a better compound preservative formula was obtained using the regression equation.[Results]The compound preservative formula was:AA 0.25%,CA 0.5%,Nisin 0.09%,GSH 0.15%.The compound fresh-keeping liquid effectively delayed the browning of fresh-cut yam and the accumulation of MDA,maintained the content of TSS,inhibited the activity of PAL and delayed the appearance of the maximum activity of POD and POD.[Conclusions]This study provides technical support for the actual extension of the shelf life of fresh-cut yam.

Experimental investigation of laser surface processing of flexure silicon nitride ceramic

A continuous wave carbon dioxide (CO2) laser (λ=10.6μm) was employed to treat the surface of Si3N4 MOR (modulus of rupture) bars. The effects of the CO2 laser process on physical and mechanical properties of ground Si3N4 samples were investigated. Scanning electron microscopy (SEM) analysis shows that the area occupied by cavities and fracture is decreased by about 49.4% after laser treatments. Cross-sectional metallography results indicate that the secondary YSiAlON phase in the Si3N4 ceramic is softened/melted and flowed into the defects. Four-point bending tests show that the flexural strength of the treated samples is improved to 10.9%. Fractographic analysis show that the fracture origins move from the surface to subsurface. It is concluded that laser surface processing have significant effects on fracture behavior of flexure Si3N4 ceramic.

A STRATIGRAPHIC UNCONFORMITY SURFACE BETWEEN THE NEOGENE AND THE PALEOGENE IN THE JIYANG DEPRESSION,BOHAI BAY BASIN, EASTERN CHINA:GEOLOGIC CHARACTERISTICS, FORMATIONPROCESS AND GEODYNAMIC ORIGIN

Regional stratigraphic unconformity surfaces are commonly observed in both orogenic beltsand sedimentary basins. They have superficially simple features, but in fact contain abundant geo-logic and geodynamic in formation on basin evolution, which was rarely systematically studied.Based on the elaborate research on geologic characteristics of the stratigraphic unconformity sur-face between the Neogene and the Paleogene in the Jiyang depression, Bohai Bay basin, EasternChina, this paper reconstructed its formation process and paleotopography in the late Oligocene. ltis the most interesting that this stratigraphic uncon formity surface represents the transiton of theJiyang depression evolution from rifting extension to thermal down-warping and also implies an u-plift process during the transition. This paper thought it worthy to study the origin of thisstratigraphic uncohformity surface and its relation to the stage transition of basin evolution. ThenpossibIe influences of regional stress field and deep dynamic process variations on the stratigraphicunconforrnity surface formation were anaIyzed. The stratigraphic unconformity surface betweenthe Neogene and the Paleogene in the Jiyang depression should be the direct result of extremestretching of llthosphere and diapirism of hot upper mantle, which can also possibly explain the co-incidence of the unconformity surface formation with the stage transition of basin evolution. Fur-thermore. the influences of the stratigraphic unconformity surface formation on oil and gas accu-mulation, the erosion amount calculation, and the elaborate time structure recorded by thestratigraphic unconformity surface were discussed.

Origin软件在“微生物学”实验教学中的应用——以细菌生长曲线的测定实验为例

针对高校本科“微生物学”实验教学中遇到的数据处理问题,以细菌生长曲线测定的实验为例,使用Origin 2022软件进行数据导入、数据计算、图形绘制及插入误差棒等操作,完成细菌生长曲线的绘制。结果表明,利用Origin软件可以快速对实验数据进行批量处理,操作简捷并可避免人工计算的误差,对实验得到的非线性数据通过软件可以拟合出美观的图形,将实验结果可视化。在教学中通过引入Origin软件,可以在讲授具体微生物知识的同时,让本科生掌握一款专业的数据分析处理软件,有助于培养本科生的数据处理能力,提高综合科研素养,为后续实验课程和科研工作的数据处理工作打好基础。

巧用Origin软件处理物理化学实验数据

Origin软件是一个多文档界面的应用程序,功能强大,普遍用于数据分析和科研绘图。以物理化学实验中几个常见实验为例,介绍了Origin软件绘制图形的方法,以及对所作的图形进行线性拟合、非线性曲线拟合等操作。与传统坐标纸绘制图形的方法相比,运用该软件处理实验数据,结果科学精确、方便快捷,在物理化学实验教学中可发挥很大作用,对提高学生使用计算机综合处理数据的能力有极大帮助。

Origin在曲线拟合中的应用

论文给出了用Origin进行数据分析的方法,结合VisualBasic编程得到了较为理想的曲线拟合结果。实验表明该方法操作简单,精确度高,具有一定的实用价值。

Origin软件在大学物理实验数据处理中的应用

介绍了利用Origin软件对光敏电阻特性实验数据的处理过程,并通过作图和对实验图像拟合阐述了该软件的使用方法,实践表明把其作为常用数据处理方法引入大学物理实验有利于实验教学。

Origin软件在物理化学实验中的应用探讨

以物理化学实验中《蔗糖水解反应速率常数的测定》、《溶解热的测定》、《三液系相图的绘制》3个实验为例,应用Origin软件在计算机上对物理化学实验数据进行作图、线性拟合、非线性拟合以及三角坐标的绘制等处理,可减少绘图偏差,使结果更加科学、准确。

Origin软件在大学物理实验数据处理中的应用

本文以一实例详细介绍了Origin软件对大学物理实验数据处理的方法,其在处理量大繁多的实验数据时具有强大的功能,与传统的手工处理方法相比,利用该软件可以提高作图精度和减少数据处理误差.

Origin软件在大学物理实验数据处理中的应用

文章介绍了Origin软件的主要功能、技术特点。以实验为例,介绍Origin软件在大学物理实验中数据处理的方法。使用该软件处理物理实验数据能有效避免手工处理所带来的误差,而且方法简单,适合在实验教学中使用。

Origin软件在实验数据处理中的应用——以燃烧热测定实验为例

目的研究Origin软件在实验数据处理中的应用,即以Origin软件代替手工方法对实验测定的数据进行绘图、计算、拟合等。方法以燃烧热测定实验为例,用Origin软件对所得数据分段线性拟合绘制雷诺校正图,并与学生手工绘图处理的数据对比。结果由于数据点多,传统用坐标纸手工绘图,不仅耗时,而且处理结果因人而异,人为因素往往会对实验结果带来一定的误差。而采用Origin软件处理实验数据,不仅比手工绘图处理所得结果更准确,而且节省时间。结论 Origin软件应用于处理实验数据,可以有效消除人为误差,节省时间,所得结果更为准确、可靠。

用Origin软件处理“溶液表面吸附的测定”实验数据

介绍一种用Origin软件处理"溶液表面吸附的测定"实验数据的方法与操作步骤,该方法所选择的拟合函数由已知的公式推导而来,拟合函数正确,而且只需一步处理即可得到结果,将数据处理带入的误差降至最小。给出了具体的数据处理操作步骤,实用、简便。

用Microcal Origin实现电子实验数据的快速处理与分析

通过一个具体的电子测量与传感器实验数据处理实例 ,介绍了如何使用 Microcal Origin来完成实验数据的快速处理与分析。与其他计算软件诸如 Forturn,C和 Matlab相比 ,该数据处理软件界面友好 ,使用方便 。

Origin软件在杨氏模量实验数据处理中的应用

分别采用逐差法及Origin软件处理了杨氏模量实验数据,验证了Origin软件在处理线性拟合问题具有精确、高效等优点。说明Origin软件是实验数据处理的一种有效工具,值得进一步推广应用。

Origin软件在自由沉淀和絮凝沉淀实验数据处理中的应用

自由沉淀实验数据处理中需要进行积分运算,絮凝沉淀实验数据处理中需要绘制悬浮颗粒去除百分数等值线。传统的梯形积分法和手工绘制等值线法存在主观性强、工作量大等缺陷。文中结合2个实例介绍了利用Origin软件进行自由沉淀和絮凝沉淀实验数据处理的方法,简单易行,绘图规范,计算精确。

Origin软件在实验数据拟合中的应用

本文介绍了Origin软件线性拟合和非线性拟合处理实验数据的方法,并以恒压过滤常数的测定实验为例,详细介绍了如何使用Origin软件进行线性拟合。以溶解热的测定实验为例,说明了Origin软件非线性拟合求得实验曲线的方法。结果表明,Origin软件能够快速、精确、客观地处理实验数据,将其应用于实验教学中,能够激发学生的学习积极性,培养学生良好的科研素养,提高学生的综合应用能力。

MicroCal Origin软件包在数据处理与图形绘制中的应用

在数据采集与处理过程中,往往会遇到数据量大、数据处理步骤繁杂以及人为做图误差大等诸多困难.该文利用MicroCalOrigrin6.x软件包中数据分析及图形绘制的强大功能,将其应用于测定溶液表面张力,计算溶液表面饱和吸附量以及饱和吸附分子的横截面积.所得结果与文献值较好吻合.

Origin软件在《物理化学实验》中的应用

物理化学实验的数据处理中多数需要作图、求斜率及曲线拟合等,现多采用手工计算及人工作图的方法,致使同一组实验数据所得到的实验结果常常不能吻合,误差很大。文中选用几例有代表性的物理化学实验,运用Origin软件进行实验数据的绘图及曲线拟合等。结果表明,运用Origin软件能降低数据处理的随意性,减少处理误差,并且快捷方便,简化了数据处理的过程,提高了分析结果的准确度,使实验结果更合理。