underdetermined

基本解釋

A fast generalized complex sphere decoder is proposed for under-determined MIMO systems with fewer receive antennas than transmit antennas in this paper.
它能處理多輸入多輸出系統(tǒng)（MIMO）中發(fā)送天線多于接收天線的情形，并能同時檢測具有格型結(jié)構(gòu)和不具有格型結(jié)構(gòu)的二維空間星座信號。
In the end, productivity index threshold under different suitable-levels was determined by analyzing the frequency histograms distribution of 4 productivity index.
通過分析多因素綜合作用下四項指標的頻率分布情況，確定上述四個生產(chǎn)性指標在不同宜耕等級下的閾值。
Alcohols, after in situ derivatization to the corresponding alkyl xanthates under phase-transfer catalysis, were determined in aqueous solution by differential-pulse polarography.
通過相轉(zhuǎn)移催化反應(yīng)使樣品中的醇就地衍生為黃原酸鹽，然后用微分脈沖極譜測定。

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.
研究了欠定情況下的時頻域盲分離算法。
計算機科學技術(shù)
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.
根據(jù)圖像允許微小失真的特點，盲源分離圖像加密方法利用盲源分離理論的欠定難題實現(xiàn)了多幅圖像加密。
數(shù)學
欠定的