Power World Simulator软件的电力系统暂态稳定性仿真

将可视化软件Power World Simulator应用于电力系统暂态稳定性仿真,介绍了仿真的步骤和发电机模型库,建立IEEE-3机9节点系统,先求得系统的潮流分布,然后选择发电机、励磁系统和稳定器的类型,设置三相短路故障,完成暂态稳定性仿真。通过分析和对比发电机6阶、5阶实用模型和经典2阶数学模型时的仿真结果,验证了暂态稳定性仿真结果的有效性。

基于GX Developer和GX Simulator软件的PLC顺序功能图的开发与仿真

顺序功能图(Sequential Function Chart,SFC)在设计具有选择和并发分支的顺序控制系统方面有着诸多优势,获得了应用广泛。结合三菱公司GX Developer Ver.8.86程序开发软件和GX Simulator Ver.7.24程序仿真软件,以FX2N(C)系列PLC为对象,围绕典型的机械手顺序控制系统,详细介绍了SFC开发与仿真过程,并总结了一些开发技巧。

可视化软件包Power World Simulator在电力系统教学中的应用

介绍一种先进的电力系统仿真软件Power World Simulator,其以潮流分析为核心,采用动画式多色彩的单线图可视化技术,模拟电力系统在给定时间段内的运行状况,从而直观、生动地阐述电力系统的基本概念,是辅助教学的有力工具。

网络模拟软件Network Simulator在网络课程教学中的应用

简要介绍网络模拟软件N S(N etw ork S im u lator),分析网络模拟软件N S在教学中应用的优点。认为N S应用于计算机网络课程进行辅助教学和辅助实验具有经济性、方便性、针对性和可重复性等优点。提出应用网络模拟软件N S进行课堂演示、实验比较、设计开发三种教学。这样可以让学生通过观看网络运作动画、分析网络性能结果和设计简单网络实体,能让学生更容易、深入地理解网络协议和算法的复杂行为,收到更好的教学效果。

GX Simulator仿真软件在PLC程序调试中的应用

采用GX Deve1oper编程软件及GX Simulator仿真软件可以在计算机上直接进行PLC编程及仿真调试。文中探讨了使用GX Simulator进行PLC程序调试的方法和步骤。利用仿真软件,能够使PLC程序设计与调试脱离硬件本身,给系统的开发及PLC的教学和自学提供了便利。

仿真软件POWER WORLD SIMULATOR在电力系统分析课程中的应用

电力系统分析课程中有些概念抽象,不容易通过实际演示来完成,使得本门课程教与学都变得困难起来。采用具有可视化图形用户界面的Power World Simulator软件,可以很好地解决这些问题。文章介绍了这款全英文免费的软件,根据一个14节点电力系统原型,建立了可视化的模型,使用该软件演示了潮流计算和短路计算等难点问题,显示了该软件给电力系统分析课程教与学带来的好处。

PowerWorld Simulator电力系统仿真可视化软件包的功能及应用

美国伊利诺伊大学电气及计算机工程学院开发的PowerWorld Simulator电力系统仿真可视化软件可直观形象地显示电力系统的运行情况.用户可以建立、更改各种电力系统模型及参数,在仿真器中进行各种操作,从而对模型进行潮流分析、故障分析及经济运行分析等.阐述仿真器强大的功能和操作简易的特点,并与其他仿真软件进行比较,通过在PowerWorld Simulator中实现仿真算例,分析比较仿真结果,证明了PowerWorld Simulator的准确性,以及在电力系统行业的应用前景.

三菱GX Simulator仿真软件在PLC教学中的应用

介绍了仿真技术在PLC教学中的现实意义,并通过实例介绍了三菱公司的GX Simulator软件在PLC程序调试中的应用,着重分析其时序仿真和列表仿真,并给出仿真结果。

基于GX/GT Simulator仿真软件的PLC项目化教学实践

本文主要讨论了运用三菱公司的GX Developer软件进行PLC控制程度的编写以及借助GX Simulator对整个控制程序进行运行测试。同时,为了提高控制结果的形象直观,利用触摸屏GT Designer2设计人机对话窗口,再通过GX Simulator2软件将PLC控制程序和人机对话窗口予以稳定的连接,进而实现整个程序的仿真。通过仿真软件的有效运用,能够大大降低教学设施费用,有效缩短试验周期,极大地改善了PLC的授课效果。

基于Power World Simulator仿真软件在教学中的应用

Power World Simulator电力系统仿真软件,核心是潮流分析,使用彩色动画单线图等可视化技术,在给定参数下模拟电力系统运行状况展示出电力系统运行的基本情况,该软件不仅在电力系统规划、分析应用中,在教学中也是的有力应用工具。

Two Monte Carlo-based simulators for imaging-system modeling and projection simulation of flat-panel X-ray source

The advantages of a flat-panel X-ray source(FPXS)make it a promising candidate for imaging applications.Accurate imaging-system modeling and projection simulation are critical for analyzing imaging performance and resolving overlapping projection issues in FPXS.The conventional analytical ray-tracing approach is limited by the number of patterns and is not applicable to FPXS-projection calculations.However,the computation time of Monte Carlo(MC)simulation is independent of the size of the patterned arrays in FPXS.This study proposes two high-efficiency MC projection simulators for FPXS:a graphics processing unit(GPU)-based phase-space sampling MC(gPSMC)simulator and GPU-based fluence sampling MC(gFSMC)simulator.The two simulators comprise three components:imaging-system modeling,photon initialization,and physical-interaction simulations in the phantom.Imaging-system modeling was performed by modeling the FPXS,imaging geometry,and detector.The gPSMC simulator samples the initial photons from the phase space,whereas the gFSMC simulator performs photon initialization from the calculated energy spectrum and fluence map.The entire process of photon interaction with the geometry and arrival at the detector was simulated in parallel using multiple GPU kernels,and projections based on the two simulators were calculated.The accuracies of the two simulators were evaluated by comparing them with the conventional analytical ray-tracing approach and acquired projections,and the efficiencies were evaluated by comparing the computation time.The results of simulated and realistic experiments illustrate the accuracy and efficiency of the proposed gPSMC and gFSMC simulators in the projection calculation of various phantoms.

Application of Patient Simulators Combined with Internet plus Scenario Simulation Teaching Models on Intravenous Infusion Nursing Education in China

Objective: To explore the effectiveness of applying patient simulators combined with Internet Plus scenario simulation teaching models on intravenous (IV) infusion nursing education, and to provide scientific evidence for the implementation of advanced teaching models in future nursing education. Methods: Enrolled 60 nurses who took the IV infusion therapy training program in our hospital from January 2022 to December 2023 for research. 30 nurses who were trained in traditional teaching models from January to December 2022 were selected as the control group, and 30 nurses who were trained with simulation-based teaching models with methods including simulated patients, internet, online meetings which can be replayed and scenario simulation, etc. from January to December 2023 were selected as the experimental group. Evaluated the learning outcomes based on the Competency Inventory for Nursing Students (CINS), Problem-Solving Inventory (PSI), comprehensive learning ability, scientific research ability, and proficiency in the theoretical knowledge and practical skills of IV infusion therapy. Nursing quality, the incidence of IV infusion therapy complications and nurse satisfaction with different teaching models were also measured. Results: The scientific research ability, PSI scores, CINS scores, and comprehensive learning ability of the experimental group were better than those of the control group (P 0.05), and their assessment results of practical skills, nursing quality of IV infusion therapy during training, and satisfaction with teaching models were all better than those of the control group with statistical significance (P < 0.05). The incidence of IV infusion therapy complications in the experimental group was lower than that in the control group, indicating statistical significance (P < 0.05). Conclusions: Teaching models based on patient simulators combined with Internet Plus scenario simulation enable nursing students to learn more directly and practice at any time and in any place, and can improve their proficiency in IV infusion theoretical knowledge and skills (e.g. PICC catheterization), core competencies, problem-solving ability, comprehensive learning ability, scientific research ability and the ability to deal with complicated cases. Also, it helps provide high-quality nursing education, improve the nursing quality of IV therapy, reduce the incidence of related complications, and ensure the safety of patients with IV therapy.

Transurethral resection of bladder tumor: A systematic review of simulator-based training courses and curricula

Objective:Transurethral resection of bladder tumor is one of the most common everyday urological procedures.This kind of surgery demands a set of skills that need training and experience.In this review,we aimed to investigate the current literature to find out if simulators,phantoms,and other training models could be used as a tool for teaching urologists.Methods:A systematic review was performed according to the Preferred Reporting Items for Systematic reviews and Meta-Analyses statement and the recommendations of the European Association of Urology guidelines for conducting systematic reviews.Fifteen out of 932 studies met our inclusion criteria and are presented in the current review.Results:The UroTrainer(Karl Storz GmbH,Tuttlingen,Germany),a virtual reality training simulator,achieved positive feedback and an excellent face and construct validity by the participants.The inspection of bladder mucosa,blood loss,tumor resection,and procedural time was improved after the training,especially for inexperienced urologists and medical students.The construct validity of UroSim®(VirtaMed,Zurich,Switzerland)was established.SIMBLA simulator(Samed GmbH,Dresden,Germany)was found to be a realistic and useful tool by experts and urologists with intermediate experience.The test objective competency model based on SIMBLA simulator could be used for evaluating urologists.The porcine model of the Asian Urological Surgery Training and Education Group also received positive feedback by the participants that tried it.The Simulation and Technology Enhanced Learning Initiative Project had an extraordinary face and content validity,and 60%of participants would like to use the simulators in the future.The 5-day multimodal training curriculum“Boot Camp”in the United Kingdom achieved an increase of the level of confidence of the participants that lasted months after the project.Conclusion:Simulators and courses or curricula based on a simulator training could be a valuable learning tool for any surgeon,and there is no doubt that they should be a part of every urologist's technical education.

NeTrainSim:a network-level simulator for modeling freight train longitudinal motion and energy consumption

Although train modeling research is vast, most available simulation tools are confined to city-or trip-scale analysis, primarily offering micro-level simulations of network segments. This paper addresses this void by developing the Ne Train Sim simulator for heavy long-haul freight trains on a network of multiple intersecting tracks. The main objective of this simulator is to enable a comprehensive analysis of energy consumption and the associated carbon footprint for the entire train system. Four case studies were conducted to demonstrate the simulator's performance. The first case study validates the model by comparing Ne Train Sim output to empirical trajectory data. The results demonstrate that the simulated trajectory is precise enough to estimate the train energy consumption and carbon dioxide emissions. The second application demonstrates the train-following model considering six trains following each other. The results showcase the model ability to maintain safefollowing distances between successive trains. The next study highlights the simulator's ability to resolve train conflicts for different scenarios. Finally, the suitability of the Ne Train Sim for modeling realistic railroad networks is verified through the modeling of the entire US network and comparing alternative powertrains on the fleet energy consumption.

Blast waveform tailoring using controlled venting in blast simulators and shock tubes

A critical challenge of any blast simulation facility is in producing the widest possible pressure-impulse range for matching against equivalent high-explosive events.Shock tubes and blast simulators are often constrained with the lack of effective ways to control blast wave profiles and as a result have a limited performance range.Some wave shaping techniques employed in some facilities are reviewed but often necessitate extensive geometric modifications,inadvertently cause flow anomalies,and/or are only applicable under very specific configurations.This paper investigates controlled venting as an expedient way for waveforms to be tuned without requiring extensive modifications to the driver or existing geometry and could be widely applied by existing and future blast simulation and shock tube facilities.The use of controlled venting is demonstrated experimentally using the Advanced Blast Simulator(shock tube)at the Australian National Facility of Physical Blast Simulation and via numerical flow simulations with Computational Fluid Dynamics.Controlled venting is determined as an effective method for mitigating the impact of re-reflected waves within the blast simulator.This control method also allows for the adjustment of parameters such as tuning the peak overpressure,the positive phase duration,and modifying the magnitude of the negative phase and the secondary shock of the blast waves.This paper is concluded with an illustration of the potential expanded performance range of the Australian blast simulation facility when controlled venting for blast waveform tailoring as presented in this paper is applied.

VBSQA Process Simulator:一个基于"价值"的软件过程仿真工具

传统的软件过程是基于"中性价值"的,它们通常因为不能适应变化而导致项目失败.为此,Boehm提出了基于"价值"的软件工程,将"价值"引入到软件工程中,从而产生了基于"价值"的软件过程.VBSQA就是一个以WinWin螺旋模型为基础的基于"价值"的软件过程框架.本文介绍的VBSQA Process Simulator是一个基于用对象网对VBSQA过程建模的过程仿真工具,它为用户在使用VBSQA软件过程框架建立软件过程的工作当中提供过程可视化、验证及仿真VBSQA软件过程的功能,从而有效地缩短了VBSQA的学习曲线.

Power World Simulator在电力系统类课程教学中的应用

本文介绍了美国伊利诺斯大学开发的电力系统可视化仿真软件包Power World Simulator,其以潮流分析为核心,采用动画式多色彩的单线图等可视化技术展现电力系统在给定时间段内的运行状况,可以直观、生动地阐述电力系统运行的基本概念,本文基于一个电网分析实例展示了其部分功能。Power World Simulator是电力系统类课程教学和实验教学的一种有力辅助教学工具,可以加强学生对理论知识的理解,提高学生的学习兴趣和积极性,加深他们对电力系统运行的认识。

PLC教学中利用三菱GT Simulator3仿真软件的教学模式研究

PLC是高职高专类院校机电、控制类专业的核心课程。PLC教学主要体现在指令的应用方法和程序设计方面,利用三菱GT Simulator3仿真软件,可在三菱GOT1000系列触摸屏上实现PLC程序的离线仿真。使用该软件配合GX Works2,可在没有PLC的情况下,为初学者或条件有限的院校提供一个优秀的教学平台。

Molecular simulation study of the microstructures and properties of pyridinium ionic liquid[HPy][BF_(4)]mixed with acetonitrile

The microstructures and thermodynamic properties of mixed systems comprising pyridinium ionic liquid[HPy][BF_(4)]and acetonitrile at different mole fractions were studied using molecular dynamics simulation in this work.The following properties were determined:density,self-diffusion coefficient,excess molar volume,and radial distribution function.The results show that with an increase in the mole fraction of[HPy][BF_(4)],the self-diffusion coefficient decreases.Additionally,the excess molar volume initially decreases,reaches a minimum,and then increases.The rules of radial distribution functions(RDFs)of characteristic atoms are different.With increasing the mole fraction of[HPy][BF_(4)],the first peak of the RDFs of HA1-F decreases,while that of CT6-CT6 rises at first and then decreases.This indicates that the solvent molecules affect the polar and non-polar regions of[HPy][BF_(4)]differently.

Müller cells are activated in response to retinal outer nuclear layer degeneration in rats subjected to simulated weightlessness conditions

A microgravity environment has been shown to cause ocular damage and affect visual acuity,but the underlying mechanisms remain unclear.Therefore,we established an animal model of weightlessness via tail suspension to examine the pathological changes and molecular mechanisms of retinal damage under microgravity.After 4 weeks of tail suspension,there were no notable alterations in retinal function and morphology,while after 8 weeks of tail suspension,significant reductions in retinal function were observed,and the outer nuclear layer was thinner,with abundant apoptotic cells.To investigate the mechanism underlying the degenerative changes that occurred in the outer nuclear layer of the retina,proteomics was used to analyze differentially expressed proteins in rat retinas after 8 weeks of tail suspension.The results showed that the expression levels of fibroblast growth factor 2(also known as basic fibroblast growth factor)and glial fibrillary acidic protein,which are closely related to Müller cell activation,were significantly upregulated.In addition,Müller cell regeneration and Müller cell gliosis were observed after 4 and 8 weeks,respectively,of simulated weightlessness.These findings indicate that Müller cells play an important regulatory role in retinal outer nuclear layer degeneration during weightlessness.