better bench华数杯

better bench华数杯是2023年华数杯全国大学生数学建模竞赛中的B题，要求设计不透明制品的最优配色方案。对于配方的浓度范围，需要满足约束条件cmin≤ci≤cmax，其中ci表示第i个配方的浓度。这是一个聚类问题，可以使用聚类分析将婴儿睡眠质量分为四类：优、良、中和差。通过K-Means、Birch等聚类算法，可以根据婴儿的整晚睡眠时间、睡醒次数和入睡方式等指标对婴儿睡眠质量进行分类，将数据集中的样本分成四个组，每个组代表一类睡眠质量。

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better bench

"Better bench" could refer to a type of shower bench that is constructed using a waterproof material such as tile or stone, rather than a traditional wooden bench that can degrade over time due to exposure to moisture. These benches are often preferred because they are more durable and easier to maintain. Is there anything else you would like to know about "better bench"?