E - echolocation 中文

echolocation n.【物理學】回波定位(法)。

echt
The characteristics of echolocating calls of r . yunanensis , r . macrotis , h . pratti and h . bicolor were analyzed and described ; it is the first time in china to do this kind of research . r . yunanensis is native to china , so the research on its echolocation is characteristic of china and provides new data to set up the echolocating calls database in the world 對云南菊頭蝠、大耳菊頭蝠、普氏蹄蝠、雙色蹄蝠的回聲定位聲波進行分析，描述其聲波特征，是國內首次對這4種蝙蝠回聲定位聲波的報導，云南菊頭蝠是中國特有蝙蝠，對其進行聲波描述具有中國特色，為國際蝙蝠回聲定位聲波庫的建立提供新的數據和資料。
This paper applies discret wavelet transform ( dwt ) to the analysis of echolocation calls of several bats . taking advantage of retractility and time - delay characteristics of wavelet , this paper solves the problems of fixed resolving power and large redundance of the information caused by traditional sonogram analysis by choosing the scale of wavelet correctly 本文將離散小波變換應用于蝙蝠回聲定位叫聲的分析中，利用小波的伸縮和時移特性，通過對小波尺度的適當離散，解決了傳統語譜分析的分辨率固定、信息冗余量大的問題。
There are some intra - species differences in the echolocation calls of myotis daubentoni , myotis ricketti , myotis capaccinii , miniopterus schreibersii parvipes and pipistrellus abramus when they are in different state such as flying , being held , crawing and setting off . the intra - species differences of myotis daubentoni , myotis ricketti are most significant 櫛鼠耳蝠、大足鼠耳蝠、毛腿鼠耳蝠、普通長翼蝠福建亞種和普通伏翼在飛行、手持、爬行和起飛等不同狀態下的回聲定位聲波均具有一定差異。
There are individual differences in the pipistrellus abramus infants , including the differences of echolocation calls structure , parameters and call repetition and so on , which can make the mother bats recognize their own infants among the infant bats colony and avoid the wrong lactation behavior 幼幅聲波的個體差異主要用于母嬰間的識別和交流，使母幅能夠正確、順利地在幼幅群體中找到自已的幼幅，避免錯誤哺乳行為的發生。
During the evolution bait flys to avoid competitions with other animals which live in ocean or on land . successful evolution of echolocation system in the sky makes them avoid competitions with birds . so thy occupied a special ecological niche - sky of night 在進化的過程中，蝙蝠避開與其他海陸獸類的競爭而飛向天空；在空中，回聲定位系統的高度進化使它們避開與鳥類的競爭而占據了獨特的生態位- - - -黑暗的夜空。
These sounds are generally emitted through the mouth , but horseshoe and leaf - nosed bats emit their echolocation calls through their nostrils , there they have basal fleshy horseshoe or leaf - like structures that are well adapted to function as megaphones 這些聲音一般通過口發出，但具有馬蹄鐵形和葉形鼻于的蝙蝠則通過鼻孔發出它們的回聲定位叫聲，在那里它們具有非常適合放大器功能的基本的肉質馬蹄鐵或葉狀結構。
Bat : any of various nocturnal flying mammals of the order chiroptera , having membranous wings that extend from the forelimbs to the hind limbs or tail and anatomical adaptations for echolocation , by which they navigate and hunt prey 蝙蝠：一種翼手目的夜間飛行的哺乳動物，它們具有能從前肢伸到后肢或尾巴的膜狀翅膀，其生理結構能夠靠聲波定位，并以此導航和捕食。
These differences were analyzed to show that the echolocation calls will change greatly so as to adapt to the different flying style , foraging behavior and habitats of bats . 3 蝙蝠不同狀態下回聲定位聲波存在差異的分析說明，蝙蝠的回聲定位聲波能夠產生較大的變異，其意義在于適應其不同的飛行方式、捕食策略和棲息環境以及捕食獵物的體型大小。
The study of the echolocation calls of bat is hotspot and emphases in the world . the speciality of the ecological niche and the calls of bat make it very important to study the echolocation calls of bats 蝙蝠回聲定位的研究在國際上一直是熱點和重點，因為蝙蝠特殊的生態位及聲行為的獨特性，決定了蝙蝠回聲定位行為的生態學研究具有重要意義。
Wavelet analysis because of its good retractility has become an advantaged tool in signal analysis field . we provide a new valid way for studying the echolocation calls of bat by using this tool 而小波分析則突破了傳統的傅立葉分析方法，利用其在時域和頻域上同時具有的良好的局部性，成為信號分析的一個有利的工具。
Fm sweeping and interpulse intervocal ranging from 23 . 6 ms to 443 . 8ms . myotis capaccinii use echolocation calls with short duration , long interpulse intervocal , wide fm sweeping and low duty cycle 6種蝙蝠飛行狀態下的回聲定位聲波均為fm型，一般包括1 3個諧波，能量多集中于第1諧波，第2諧波和第3諧波較弱。
Blind as a bat ? hardly . to detect prey and other objects , some bats use a sight - free radar system called echolocation . but all bats can see . see 像蝙蝠一樣看不見嗎？才不是呢。為了探測獵物和其它物體的方位，有些蝙蝠用一種叫作回聲定位的雷達系統，無需視力，但所有蝙蝠都看得見。你明白了嗎？
First , we introduces the meaning of studying echolocation , what means have been used by now , accomplishments got by others and pose the meaning of surveying sound field intensity 首先，介紹研究蝙蝠回聲定位信號的意義，目前的研究手段以及研究成果，提出對其聲場測量的學術意義。
After all , why not just wire the entire sensory system for high - resolution input and eliminate the need to constantly shift the eyes , star , or echolocation frequency 說來說去，何不將整個感覺系統都裝配成高解析度的接收器，就可以免除不斷移動眼睛、星鼻或改變回聲定位頻率的麻煩？
We can find some new character of the echolocation calls of bat , and it is very important for search for new character of bats in animal ecology 從分析結果中我們能夠發現一些蝙蝠回聲定位信號的新的特征信息，這對于進一步尋找蝙蝠新的生態學特征有著重要意義。
Of the some 900 species of bats , more than half rely on echolocation to detect obstacles in flight , find their way into roosts , and forage for food 在約900種蝙蝠中，一半以上依靠回一定位法探測飛行中的障礙物，尋找回巢的路線和用作食物的飼料。
Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz ( khz ) , whereas human hearing normally tops out at around 20 khz 用于回聲定位的叫聲一般是20 200千赫之間的超聲波，而人所能聽到的最高頻率在20千赫左右。
So it is very meaningful to study their echolocation calls in ecology concentrates in researching time - frequency charaters of the signals 根據調研我們知道，從生態學角度對蝙蝠的叫聲研究多集中在對信號本身的時頻特性研究。
When ben was 3 , he began teaching himself echolocation , something he picked up by tossi ng objects and making clicking noises to find them 班恩三歲時，就自學回聲定位，他丟擲物體再藉由發出舌音去找那些東西，這樣就學會了。

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echolocation

echolocation n.【物理學】回波定位(法)。

echt

Of the some 900 species of bats , more than half rely on echolocation to detect obstacles in flight , find their way into roosts , and forage for food 在約900種蝙蝠中，一半以上依靠回一定位法探測飛行中的障礙物，尋找回巢的路線和用作食物的飼料。

Echolocation calls are usually ultrasonic ranging in frequency from 20 to 200 kilohertz ( khz ) , whereas human hearing normally tops out at around 20 khz 用于回聲定位的叫聲一般是20 200千赫之間的超聲波，而人所能聽到的最高頻率在20千赫左右。

So it is very meaningful to study their echolocation calls in ecology concentrates in researching time - frequency charaters of the signals 根據調研我們知道，從生態學角度對蝙蝠的叫聲研究多集中在對信號本身的時頻特性研究。

When ben was 3 , he began teaching himself echolocation , something he picked up by tossi ng objects and making clicking noises to find them 班恩三歲時，就自學回聲定位，他丟擲物體再藉由發出舌音去找那些東西，這樣就學會了。