underdetermined

基本解释

A fast generalized complex sphere decoder is proposed for under-determined MIMO systems with fewer receive antennas than transmit antennas in this paper.
它能处理多输入多输出系统（MIMO）中发送天线多于接收天线的情形，并能同时检测具有格型结构和不具有格型结构的二维空间星座信号。
In the end, productivity index threshold under different suitable-levels was determined by analyzing the frequency histograms distribution of 4 productivity index.
通过分析多因素综合作用下四项指标的频率分布情况，确定上述四个生产性指标在不同宜耕等级下的阈值。
Alcohols, after in situ derivatization to the corresponding alkyl xanthates under phase-transfer catalysis, were determined in aqueous solution by differential-pulse polarography.
通过相转移催化反应使样品中的醇就地衍生为黄原酸盐，然后用微分脉冲极谱测定。

We conclude that, under a paper-money system, a determined government can always generate higher spending and hence positive inflation.
FORBES: Golden Lessons From Helicopter Ben And Spanish Galleons
The second problem is that the government has been determined to get its own debts under control by raising taxes and social-security contributions, which the economy manifestly cannot at present afford.
ECONOMIST: Japan makes a stand, sort of The

欠定
The underdetermined blind source separation algorithms in time-frequency domain are researched.
研究了欠定情况下的时频域盲分离算法。
计算机科学技术
欠定
Considering that images are insensitive to small distortion, blind source separation (BSS) based image encryption utilizes the apparent intractability of the underdetermined BSS problem to encrypt multiple images.
根据图像允许微小失真的特点，盲源分离图像加密方法利用盲源分离理论的欠定难题实现了多幅图像加密。
数学
欠定的