Hydraulic Engineering

This book serves as a refresher for upper-level undergraduate and graduate students in physics, chemistry, and engineering, solidifying their understanding of fundamental mathematical concepts crucial for scientific coursework. The content emphasizes practical applications of mathematics in these fields, starting with twelve progressively challenging examples that cultivate students' mathematical reasoning and problem-solving abilities in scientific contexts. Comprehensive illustrations and online resources enhance understanding, while the updated edition incorporates new problems, illustrations, and expanded chapters on matrix algebra and differential equations.

An Introduction to Software Engineering (Part 1) Software engineering is the study of how to systematically and effectively develop software. Typically, the development of a medium to large-scale system involves the following stages: Project Initiation: Feasibility analysis, research, and review, resulting in Feasibility Analysis Report and Project Proposal; Initial System Design: Preliminary framework design based on feasibility, including hardware design, project approval, contract signing, and agreement on basic system framework, functionalities, system lifecycle, constraints, responsibilities, and obligations, resulting in Agreement, Hardware Solution, and Project Plan; Requirements Analysis: Project establishment, team formation, customer engagement, requirement research, and analysis, culminating in Requirements Analysis Report which serves as a reference for system acceptance, including business process diagrams and data flow charts; System Design: Includes database and system function design, abstraction and summarization of actual models into functional modules, resulting in System Design Report and Draft Functional Specification Document; System Implementation: Coding phase with interspersed testing and feedback, continuous client interaction for progress updates and evolving requirements; Testing Phase: Module-wise independent testing and integration testing, focusing on issues like boundaries, black-box, and stress testing, also including performance testing; resulting in Test Report and Correction Report, alongside documentation such as User Manual, Help Manual, and Quick Reference; Packaging: Rigorous testing and bug fixing, system is in a deployable state, requires creation of installation disks; Deployment: On-site data initialization, trial run phase, issue identification and resolution; resulting in Deployment Plan, Deployment Report, Requirement Changes, System Switch Preparation, and Switch Plan; Switch: After trial runs, system is ready for client use, transitioning into operational phase at the appropriate time; Monitoring: Close monitoring of system operation, immediate issue resolution; Post-Maintenance: Patching and bug fixing operations. Project Summary: ... bonuses ... evaluation ... awards ... promotion ... productization ...

工程数值方法与MATLAB应用是一本由外国作者撰写的关于数值计算方法的书籍，对工程领域的学习和实践具有重要的参考价值。

第九章管理控制文件第一节控制文件的特点：1. 控制文件在数据库挂载状态下首次被使用；2. 数据库打开后始终被访问；3. 每个数据库至少需要一个控制文件；4. 数据库最多可以使用8个控制文件；5. 所有控制文件都具有镜像关系；6. 控制文件的数量、位置和名称由参数control_files决定；7. 如果控制文件丢失，数据库将紧急停机，重启时需要进行还原和恢复；8. 控制文件的作用包括记录数据库的物理信息和数据文件的存储位置。第二节控制文件的内容：控制文件中记录的主要内容包括数据库名称、数据库ID、创建时间、表空间数量、数据文件数量、临时文件数量、联机日志文件数量、归档日志文件数量以及RMAN备份信息。通过SQL命令可以查询数据库的相关信息：SQL> select NAME, DBID, to_char(CREATED, 'yyyy-mm-dd hh24:mi:ss') from v$database；