对于多元正态随机变量二次型的独立性的证明，最重要的是证明一个引理。
It is very important to prove a lemma for the proof of the independence between two quadratic forms of multivariate normal variables.
利用IFA300型二维恒温热线风速仪系统对双旋流气体燃烧器模型的冷态流场进行了实验研究，测量了流场内不同位置瞬时速度分布及湍流强度特性。
An experimental study was conducted of the cold-state flow field of a dual swirl gas burner model through the use of an IFA300 type two-dimensional constant-temperature hot-wire anemometer system.
首先，研究结果表明滇丁香长花柱型单态居群起源于西部邻近的二态居群。
Firstly, our results indicated that the monomorphic populations of L. pinceana were originated from adjacent western dimorphic populations.
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