在数字电路中，经常需要对两个位数相同的二进制数进行比较，以判断它们的相对大小或者是否相等，用来实现这一功能的逻辑电路就成为数值比较器。
该参数值较高可能会影响优化器在缓冲池使用中对比较保守的存取方案的选择。
Higher values for this parameter can influence the optimizer to choose access plans that are more conservative in buffer pool usage.
本论文通过对国内外糖化锅中经常采用的搅拌器进行分析比较，选择了13种搅拌器，进行了实验研究与数值模拟。
The thesis analyzed and compared the impellers which are often used domestic and international mash kettle. And 13 kinds of impellers are used with experiment research and numerical simulation.
采用数值模拟和实验相结合的方法比较了常规结构和一种特殊结构双载体三效催化转化器的性能。
The performance of dual-bed three-way catalytic converters with conventional structure and a particular structure was compared by numerical simulation and experiment.
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