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今日我们在阳台上一边品尝香槟和奶酪馅云吞,一边观赏北非黄昏的美景。我们拥有一间配备齐全的厨房,只缺一样东西。
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      It seems, Like we switch off and on for writing these blogs, the funnier ones are mine Today we watched the dusk bring Northern Africa to light, as we drank our champagne and ate our cheese filled ravioli on the balcony. We have a lovely kitchen, with all the fixin’s….the only thing missing   Read More &raquo
基于可靠性评估序贯蒙特卡洛模拟法的配电网可靠性评估研究(Matlab代码实现)内容概要:本文围绕“基于可靠性评估序贯蒙特卡洛模拟法的配电网可靠性评估研究”,介绍了利用Matlab代码实现配电网可靠性的仿真分析方法。重点采用序贯蒙特卡洛模拟法对配电网进行长时间段的状态抽样与统计,通过模拟系统元件的故障与修复过程,评估配电网的关键可靠性指标,如系统停电频率、停电持续时间、负荷点可靠性等。该方法能够有效处理复杂网络结构与设备时序特性,提升评估精度,适用于含分布式电源、电动汽车等新型负荷接入的现代配电网。文中提供了完整的Matlab实现代码与案例分析,便于复现和扩展应用。; 适合人群:具备电力系统基础知识和Matlab编程能力的高校研究生、科研人员及电力行业技术人员,尤其适合从事配电网规划、运行与可靠性分析相关工作的人员; 使用场景及目标:①掌握序贯蒙特卡洛模拟法在电力系统可靠性评估中的基本原理与实现流程;②学习如何通过Matlab构建配电网仿真模型并进行状态转移模拟;③应用于含新能源接入的复杂配电网可靠性定量评估与优化设计; 阅读建议:建议结合文中提供的Matlab代码逐段调试运行,理解状态抽样、故障判断、修复逻辑及指标统计的具体实现方式,同时可扩展至不同网络结构或加入更多不确定性因素进行深化研究。
In this task, you will design and implement a user-driven vocabulary management system that supports interaction from different types of users (e.g., readers and admins). This task simulates a real-world collaborative environment, where access control and data integrity are critical. 🧩 Task Objective You are required to implement the following two classes: Role: defines the role of a user, including their name, access level, and identity information. RoleBasedVocabSys: manages user login, menu display, command execution, and interaction with the TextProcessor object. The program should simulate a terminal-like experience for different types of users, controlling what they can see and what actions they can perform. 👥 User Roles The system supports two user roles: Reader: Can log in and view the vocabulary. Can view the top 10 and bottom 10 most frequent words. Cannot update or modify any part of the vocabulary. check the examples below for reference. Admin: Has all the permissions of the reader. Can update the vocabulary by adding new files or removing existing ones. Has full access to the vocabulary update methods from TextProcessor. User credentials and access roles are provided as the varaiable users_info from the util.py module. in scaffold. 📋 Task Requirements You must: Implement the Role class, which should: Store and return the user’s username, display name, and access level (e.g., "reader", "admin"). Provide getter methods: get_user_name(), get_access(), get_name(). Implement the RoleBasedVocabSys class, which should: Handle login and logout. Display different menus depending on whether a user is logged in and their access level. Call TextProcessor functions (from Task 7) to manage the vocabulary. Enforce role-based access control (e.g., only admins can update vocabularies). Use the provided attributes and method names in the scaffold. Do not rename or remove any predefined code blocks. Implement menu-based navigation where users can choose options via standard input: Exit the system. Login or Logout. View the top 10 or bottom 10 frequent words. Update vocabulary by adding/removing files (admin only). You may write additional helper functions or methods as needed. 🧠 Additional Notes The vocabulary is loaded and managed via the TextProcessor object created in the constructor. The files to be added/removed are fixed as data/for_admin/excluded.csv data/add.csv and data/delete.csv for this exercise, but you may generalize it in future tasks. All user input should be validated using verify_user_choice. The system should loop until the user chooses to exit. Examples Example 1a: interface when starting the program Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Enter your choice: Example 1b: unlimited attemps for invalid users inputs Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Enter your choice: ewfwef Enter your choice: edf Enter your choice: 3 Enter your choice: 4 ... Enter your choice: Example 2a: correct login credential for reader Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Please key your account name: Jueqing Please key your password: jueqing123 Welcome Jueqing Lu Please choose one option below: 1.Exit 2.Logout/Re-Login 3.Show top 10 frequency vocabularies 4.Show last 10 frequency vocabularies Enter your choice: Example 2b: correct login credential for admin Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Please key your account name: Trang Please key your password: trang123 Welcome Trang Vu Please choose one option below: 1.Exit 2.Logout/Re-Login 3.Show top 10 frequency vocabularies 4.Show last 10 frequency vocabularies 5.Updating Vobulary for adding 6.Updating Vobulary for excluding Enter your choice:
09-24
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