First use blog ,make a flag

First use blog ,make a flag(优快云)
By default, buildman doesn't execute 'make mrproper' prior to building the first commit for each board. This reduces the amount of work 'make' does, and hence speeds up the build. To force use of 'make mrproper', use -the -m flag. This flag will slow down any buildman invocation, since it increases the amount of work done on any build. One possible application of buildman is as part of a continual edit, build, edit, build, ... cycle; repeatedly applying buildman to the same change or series of changes while making small incremental modifications to the source each time. This provides quick feedback regarding the correctness of recent modifications. In this scenario, buildman's default choice of build directory causes more build work to be performed than strictly necessary. By default, each buildman thread uses a single directory for all builds. When a thread builds multiple boards, the configuration built in this directory will cycle through various different configurations, one per board built by the thread. Variations in the configuration will force a rebuild of affected source files when a thread switches between boards. Ideally, such buildman-induced rebuilds would not happen, thus allowing the build to operate as efficiently as the build system and source changes allow. buildman's -P flag may be used to enable this; -P causes each board to be built in a separate (board-specific) directory, thus avoiding any buildman-induced configuration changes in any build directory. U-Boot's build system embeds information such as a build timestamp into the final binary. This information varies each time U-Boot is built. This causes various files to be rebuilt even if no source changes are made, which in turn requires that the final U-Boot binary be re-linked. This unnecessary work can be avoided by turning off the timestamp feature. This can be achieved by setting the SOURCE_DATE_EPOCH environment variable to 0. Combining all of these options together yields the command-line shown below. This will provide the quickest possible feedback regarding the current content of the source tree, thus allowing rapid tested evolution of the code. SOURCE_DATE_EPOCH=0 ./tools/buildman/buildman -P tegra
10-31
【无人机】基于改进粒子群算法的无人机路径规划研究[和遗传算法、粒子群算法进行比较](Matlab代码实现)内容概要:本文围绕基于改进粒子群算法的无人机路径规划展开研究,重点探讨了在复杂环境中利用改进粒子群算法(PSO)实现无人机三维路径规划的方法,并将其与遗传算法(GA)、标准粒子群算法等传统优化算法进行对比分析。研究内容涵盖路径规划的多目标优化、避障策略、航路点约束以及算法收敛性和寻优能力的评估,所有实验均通过Matlab代码实现,提供了完整的仿真验证流程。文章还提到了多种智能优化算法在无人机路径规划中的应用比较,突出了改进PSO在收敛速度和全局寻优方面的优势。; 适合人群:具备一定Matlab编程基础和优化算法知识的研究生、科研人员及从事无人机路径规划、智能优化算法研究的相关技术人员。; 使用场景及目标:①用于无人机在复杂地形或动态环境下的三维路径规划仿真研究;②比较不同智能优化算法(如PSO、GA、蚁群算法、RRT等)在路径规划中的性能差异;③为多目标优化问题提供算法选型和改进思路。; 阅读建议:建议读者结合文中提供的Matlab代码进行实践操作,重点关注算法的参数设置、适应度函数设计及路径约束处理方式,同时可参考文中提到的多种算法对比思路,拓展到其他智能优化算法的研究与改进中。
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