estimation n. 1.估計(jì),評(píng)價(jià)。 2.預(yù)算,預(yù)算額;概算。 3.尊重,尊敬。 4.意見,判斷。 5.【化學(xué)】估定;測(cè)定。 in my estimation 據(jù)我估計(jì),我認(rèn)為。 in the estimation of the law 從法律上來(lái)看。 full [rise] in the estimation of the public 在公眾心目中的評(píng)價(jià)下降[上升]。 held in high estimation 極受尊重。
variance n. 1.變化,變動(dòng),變更;變度,變量;【統(tǒng)計(jì)】(平)方(偏)差。 2.(意見等的)相異;不和,沖突,爭(zhēng)論。 3.【法律】訴狀和供詞的不符。 at variance with 和…不和;和…不符 (at variance with the facts 不符事實(shí)。His conduct is at variance with his words. 他言行不符)。 set at variance 使不睦,離間。
The differences on resolution capability and the performance of estimation between beam - space processing and element - space processing are analyzed . transforming matrices are designed for the consideration of depressing the resolution threshold and estimation variance 分析比較了波束域處理與陣元域處理的分辨能力以及估計(jì)性能,并從降低分辨門限和估計(jì)方差角度考慮,給出了轉(zhuǎn)換矩陣的構(gòu)造方法。
Tricepstrum equalization algorithm ( btea ) and super - exponential ( se ) algorithm based on block data estimation is studied , and these algorithms use hos explicitly . their performance , such as estimation variance and bias , is analyzed . a kind of sparse cross cumulant and sparse equalizer is proposed to simplify the se algorithm , and the simulating results show efficient reduction in complication ?研究了幾種直接使用高階統(tǒng)計(jì)量的算法,包括基于數(shù)據(jù)段估計(jì)的倒三譜算法和超指數(shù)算法,分析了算法的估計(jì)方差和偏差等性能;由于超指數(shù)算法計(jì)算量較大,不利于實(shí)時(shí)均衡,利用水聲信道的稀疏性,提出了一種基于稀疏互四階累積量和稀疏權(quán)的算法,有效降低了超指數(shù)算法的計(jì)算量。