水下噪聲 的英文怎麼說
中文拼音 [shuǐxiàzàoshēng]
水下噪聲
英文
underwater noise-
6 an algorithm of kurtosis signal - to - noise ratio ( ksnr ) based the mot - radiated noise polyspectrum feature extraction is presented
6提出了基於峰度信噪比的水下h標輻射噪聲的多譜特徵提取演算法。Presents the steady - state programming with constant coolant average temperature and constant live steam pressure, an ideal programming for marine nuclear power plant ( npp ), under which, both the coolant average temperature and the live steam pressure of nuclear steam supply system ( nsss ) are constant when the steady state operating condition is varied, and points out that in comparison with the steadysate programming with constant coolant average temperature, the ideal programming can improve the overall operating performance of npp effectively, especially in low - load range, for instance, raise the heat efficiency of npp, decrease the operating noise of main coolant pump, and improve the conditions of design, operation and control of the secondary loop system
雙恆定運行方案是船用壓水堆核動力裝置的理想運行方案.在這種運行方案下，當裝置穩態功率變化時，冷卻劑平均溫度與蒸汽壓都保持不變，與通常採用的冷卻劑平均溫度恆定運行方案相比，有效地改善了核動力裝置的總體運行性能，特別是在低負荷運行時，可以提高裝置經濟性、降低主泵運行噪聲、改善二迴路系統的設計、運行和控制條件，這對于提高船用核動力裝置的運行可靠性和安全性具有實際意義The noise constantly is not affecting our normal life, for example ; just repaired the family, to the quiet at dead of night building about the water pipe noise, has caused you to be unable normally to rest, the senior citizen, the neurasthenia, the heart was not specially good and so on the community, was is unable to rest, the saint porch company produced " the down - flow pipe sound insulation wrap " the product, fundamentally has solved this problem, this product has used the advanced sound insulation, the sound absorption, the material, passed through the specialized technical many years research development, and experimented after the beijing ten plots different levels owner, the sound - insulated effect achieved above 90 %, satisfaction rate reached above 99 %, did not have an example suit, received the owners universal welcome
噪音無時無刻不在影響著我們正常的生活，例如；一個剛剛裝修完的家庭，到了夜深人靜樓上下水管的噪聲，使你無法正常休息，特別是老年人，神經衰弱，心臟不好等群體，更是無法休息，聖軒公司生產的「下水管隔聲套」產品，從根本上解決了這個問題，此產品採用了先進的隔音，吸音，材料，經過專業技術多年的研究開發，並經過北京十個小區不同層次業主試驗，隔音效果達到90 %以上，滿意率達99 %以上，無一例投訴，受到業主們普遍歡迎。In attempt to directly compare the sound response characters of the same bf neurons or different bf neurons and their interactive relation, the double recording microelectrodes were penetrated into two different neurons in iso - frequnency laminas or hetero - frequency laminas. taking advantage of frequency tonotopical arrangement in 1c of bats, it was explored how the neurons integrated different parallel processes of the same sound information. in the case of which, we hoped to explore the relation between the sound response characters of the central auditory neurons and neural modulation in background noise for the further understanding of the mechanism in the central auditory neurons extracting sound signals
本研究以大棕蝠（ bigbrownbat ， eptesicusfuscus ）為模型，利用ic聲調組構排列成同頻層這一結構特點，突破單電極記錄和檢測神經元的方法，同時推進兩單電極至一個同頻層或兩個同頻層的兩個不同神經元，試圖從細胞水平直接比較兩個具有相同和不同最佳頻率的神經元聲信號的加工處理特徵、以及它們之間的相互關系，以期窺探它們在對同一聲信號處理過程中的整合奧秘，並以此為基礎分析和探討背景噪聲條件下中樞神經元聲反應特徵與神經調制的關系，以期進一步了解中樞聽神經元聲信號提取的機制。Joint analysis of radiated noise from underwater vehicles based on wavelets and bispectrum
水下目標輻射噪聲的子波變換和雙譜聯合分析Bispectrum based feature extraction and classification of radiation noises from underwater targets
基於雙譜的水下目標輻射噪聲的特徵提取與分類研究This paper attentatively studies the theory of traveling bubble cavitation noise emitted from high - speed underwater self - navigator of schiebe body
本文針對回轉體形水下高速自主航行器產生的流動泡類型的空化所輻射的噪聲理論進行了探索性的研究。Chaotic switching modulations introduce low - frequency harmonic spectrum of output voltage as random switching modulation. in some case, low - frequency noise ripple offset the effect chaotic switching modulations reduce the level of emi. it indicates that the ccfmfd integrates the advantages of spreading harmonic power at the multiples of the switching frequency and not introducing significant noise ripple at low - frequency range. among all chaotic switching modulations, the ccfmfd is considered as the best choice in applying to dc / dc converter
與隨機調制模式相同，混沌開關調制模式也引入輸出低頻噪聲紋波，有些情況下低頻噪聲紋波可能抵消混沌開關調制降低emi水平的效果。分析表明： ccfmfd模式具有較好的降低emi水平和引入較小低頻紋波的優點，可以作為混沌調制模式較佳的選擇。Vibration and noise monitor for underwater arget
水下目標振動噪聲監測Autonomous underwater vehicles can mimic locomotion of aquatic animals - fishes that utilize oscillating foils as their propulsive elements. there are overwhelming advantages for them in speed, maneuverability, and noise over conventional man - made propeller
利用仿生水中生物魚類游動原理，可以製造出性能優良的水下推進系統，這種推進系統比現在所利用的螺旋槳在速度、機動性能和噪聲方面更為出色。The pin silicon photodiode made by alice - china group, which has a large area and high performances, is an important part of the photon spectrometer ( pros ) pbwo4 detector read - out system on the alice experiment. the pin diode has a sensitive area of 16x17 mm2. its leakage current is lower than 5na at room temperature
本工作研製的pin硅光電二極體的靈敏區面積為16x17mm2 ，常溫漏電流小於5na ，紫光區量子效率約為83 % ，結電容為110 - 120pf ，以及由pin光電二極體與電荷靈敏前置放大器組成的讀出系統的噪聲水平在- 25下小於527個等效噪聲電荷，並經過了長期性能穩定性的考驗The underwater glider, a new kind of underwater vehicle, has the advantages of low - noise, long range, long duration and cost - efficiency
摘要水下滑翔機器人是一種新型水下機器人，具有噪聲低、航行距離遠、續航時間長、成本低等特點。The saint porch company during the development development home use product, ( the home use product includes ; the down - flow pipe sound insulation, the soundproofing suspended ceiling, the soundproofing wall, the soundproofing floor, the sound - insulated gate, the window and so on ), meanwhile displays the acoustics decoration specialized special skill, meets each acoustics question for the project in, provides the specialized design, the specialized construction, specially aims at the theater, multi - purpose hall, singsong house, pronunciation faculty working office, conference room, recording awning, restaurant, hotel and so on, but also has the equipment level ( between equipment ) the noise quite big place, carries on the specialized design, the construction and the transformation, and achieves the ideal effect
聖軒公司在開發研製家用產品同時， （家用產品包括；下水管隔聲，隔聲吊頂，隔聲墻體，隔聲地板，隔聲門，窗等） ，同時還發揮聲學裝飾專業特長，為工程中所遇到的各種聲學問題，提供專業設計，專業施工，特別是針對影劇院，多功能廳，歌廳，語音教研室，會議室，錄音棚，酒樓，飯店等，還有設備層（間）噪音比較大的場所，進行專業設計，施工及改造，並且達到理想的效果。We select a common feature in the image - edge of the object as our research content and from this point we spread our work including the contrast enhancing technologies, using mathematical morphology to restrain noises in image, extracting of the geometric primitives, dwt in edge detection and the border thinning and tracing technologies
我們重點針對圖像物體的最直觀特徵?邊緣進行研究，以此為出發點，研究了包括水下圖像對比度增強，利用同態學進行水下圖像噪聲去除，直線和橢圓基元的提取，利用小波變換進行邊緣提取以及基於多邊形近似原則的邊緣追蹤技術在內的各種演算法。The traffic noise of a new traffic source - combined overhead road was measuered, and the noise distribution under varied road conditions and different surroundings was compared, anlyzed and discussed. the noise model of overhead road, which with special section such as slope was put forwarded, based on the basic overhead noise model by considering the effects of the special section on the total noise level and distribution
比較分析了不同路況下及周圍環境下的噪聲分佈情況，在水平段高架復合道路噪聲的豎直分佈模型的基礎上，考慮上下坡段對兩側建築物噪聲分佈的影響，建立了特殊路況下高架復合道路噪聲的豎直分佈模型，預測值與實測值基本符合。When submarine curves close the water surface, the course is affected by the quasi white noise disturbances. the close water control structure is same with that in deep water. the simulations show that the control effects are close to the ideal situations
由於在近水面航行時，航向所受到的主要是接近於白噪聲的干擾，所以採用了結構和水下相同的航向自動舵，由模擬曲線可看出控制效果比較理想。Usually, single vector sensor will obtain infinite gain if noise energy flow can be counteracted in whole space
在理想情況下，若噪聲場為各向同性噪聲場，則通過聲能流長時間積分，單個矢量水聽器便可獲得無限大的增益。Therefore, this paper studies three kindsvalves such like bufferfly valve, brake valve and ball valve, with the numerical simulation method by cfx which is often used to simulate the fluid. by the simulation of three kinds of valves, we can kown dynamic characteristic of them. in this paper, i not only simulate for three kinds of valves, but also analyse cause of flow - noise and give respectively mathematical model of main noise sources in piping system such as pupm and valve
本文通過cfx軟體，用數值模擬的方法，對海水管路系統中常見的三種閥門（蝶閥、閘閥、球閥）流動特性及噪聲進行了模擬分析，闡明閥門噪聲產生的機理，建立了泵和閥門等噪聲源的數學模型，並對管路系統中涉及到的邊界條件做了適當的處理，分析了閥門下游的渦聲。Measurement of underwater noise
水下噪聲測量The technique of the acoustical design of anechoic coatings is one of the most important parts. the design of anechoic coatings which are effective anechoic at low frequency and broad band is an especially difficult problem
消聲層的聲學設計是其重要的組成部分之一，特別是消聲層已經向低頻寬帶發展，長期以來一直是水下消聲降噪領域的一個難題。分享友人