近場長度 的英文怎麼說

中文拼音 [jìnchǎngzhǎngdù]
近場長度 英文
near field length
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 場 : 場Ⅰ名詞1 （平坦的空地 多用來翻曬糧食 碾軋穀物） a level open space; threshing ground 2 [方言] （...
  • 長 : 長Ⅰ形容詞1 （年紀較大） older; elder; senior 2 （排行最大） eldest; oldest Ⅱ名詞（領導人） chief;...
  • 度 : 度動詞[書面語] （推測; 估計） surmise; estimate
  • 長度 : length; longitude; size; extent; footage
  1. The product quality faces up to enormous domestic and international markets challenge and the peasants face up to the slow increasing of their incomes. the shortage of water resource is more serious for the planted system, climatic change and low utilization ratio. cultivated land resource is reducing rapidly for nature factors and urbanization process, etc. the analysis results indicate the resour ces utilization mode in the hhh plain is still high investment, high - energy consumption, and grievous pollution

    農產品生產在我國佔有絕對優勢，但其受結構調整的影響也發生了波動性變化，其產品質量面臨著國內外市場巨大的挑戰，農民收入也面臨著增長緩慢的挑戰；水資源受種植制度、氣候變化及利用率低等多種因素的脅迫作用，嚴重短缺；耕地資源近年來大量減少，受自然及城市化進程等因素的影響，稀缺程度加大。
  2. First, it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width, side lobe amplitude, elimination of grating lobes ), amplitude of ultrasonic pressure, element viberation pattern, mutual radiation among elements, efficient test regions, ability to keep accurate and near - field distance and so on. based on the direction of ultrasonic field in ulpa deduced by ourselves. in addition, on the base of integrating all kinds of factors, it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer, and its design programme and interface were compiled

    首先在推導超聲相控線陣換能器聲場的指向性的基礎上，就各個晶片幾何參數對指向性指標（主瓣寬度、旁瓣幅度、消除柵瓣） 、聲壓幅值、陣元振動模式、陣元間互輻射、有效檢測區域、精確控制能力、近場長度等方面的影響進行了論述，並在綜合各方面影響的基礎上，提出了晶片幾何參數優化設計的原則和方法，編寫了設計程序和界面。
  3. " another new development is that boeing has announced its plan to develop a faster, longer - range aircraft than can fly at speeds close to the speed of sound ( i. e. mach 0. 95 or faster ) over extended ranges. this new aircraft will open a new chapter in commercial aviation as it provides not only a higher speed and longer range but also the comfort of flight at higher altitudes and the environmental benefits of quieter landings and takeoffs, and in the latter sense it will provide benefits not only to the airlines and passengers but also to the communities living near the airports

    95馬赫或更快） 。這類新飛機不但速度較快和可飛越更長程，而且因其在較高高度運作，可令旅客倍感舒適。此外，由於其升降較為寧靜，故不但令航空公司和乘客受惠，也可減少對居住機場附近的社區造成的影響，為商業航空發展編寫新一頁，實在令人鼓舞。
  4. On september 8, chang an suzuki, the sino - japanese joint venture in southwestern chongqing municipality, began recalling more than 157, 000 alto mini cars because of fuel pipe faults, representing the biggest vehicle recall by number so far in china. other domestic and foreign automakers, including faw car co ltd, guangzhou honda, mitsubishi fuso truck bus corp and toyota, have also recalled defective vehicles in china during the past three months

    長城客車總經理鄭春來說：長城客車系列是長城汽車公司的主導產品之一，目前已開發9個系列，近百個品種，投放市場以來，長城客車大批量打入國際市場，在海外享有很高的聲譽，在國內市場銷量節節攀升，受到用戶和業內的高度評價。
  5. We found the " forward stimulated raman scattering " will be excited if the pulse length is greater than plasma wave length. the " forward stimulation raman scattering " decreases the phase velocity and the amplitude of the wake wave which will lead to the reduction of maximum kinetic energy of the electrons trapped

    結論是：當脈沖長度接近等離子體波長時，稀薄等離子體將發生「前向受激raman散射」 ，它使脈沖后沿拉長，導致尾流場的相速度變小，以至於被尾流場「捕獲」的電子最大動能大大下降。
  6. In the first part, the basic knowledge of particle scattering in meteorology and physics was introduced. the particles to be discussed include aerosol particles, fog droplets and raindrops and the em wave band in the discussion is near - infrared. in the second part, the mie theory was briefly reviewed and was applied to investigate the scattering characteristics of spherical atmospheric particles, the result shows that in the visibility measurement meter using forward - scattering method, when the working wavelegth is between 0. 8 m ~ 2 m, the scattering angle is between 25 ~ 40, the distinguishability and the relative scattering intensity would be better than those under other conditions. in the third part, the superellipsoid was used to describe a wide range of shapes such as spheres. ellipsoids and cylinders. an improved t - matrix method which can be used to calculate arbitry shaped particle ' s scattering field was introduced, and the scattering characteristics of non - spherical atmospheric particles was investigated with this method

    計算結果表明，從相對散射強度、同一方向上不同粒子散射的可區分程度來看，在散射式能見度探測儀器中，工作波長介於0 . 86 m 2 m ，探測角度選取前向25度40度時，探測的結果將會是比較理想的。第三部分中，使用超橢球方程來統一描述各種非球形粒子的形狀，然後使用t矩陣方法計算了一些形狀的非球形粒子的近紅外散射特性。另外，在本文中還針對球形粒子的散射場提供了一種三維可視化方法，使對散射場強度的空間分佈的理解更加簡單，直觀。
  7. But the gps receivers on the air china 757 fix the position of the aircraft to within a few metres as it begins its descent through a long valley, around an awkward ridge and down onto the new runway at linzhi

    但是當中國國際航空公司的波音757客機降低飛行高度通過一條危險山脊附近的長長山谷的時候，機上的gps接收器以米的精度鎖定飛機的航向，安全降落在林芝機場的新建跑道上。
  8. Abstract : the stimulation treatment of & quot; loosening rock by the dilatancy of explosive waves & quot; is tested in the casing well 4242 for studying its result and its influence on casing. the result of the field test shows that this test is successful in technology, the oil production of the well is 4 times as much as that of it before the test ; the deformation of casing is local, and the result of the strength calculation shows that the deformation will not destroy casing

    文摘:為了研究「壓脹松動」增產技術的增產效果和對套管的影響，在延長石油管理局子長油礦對4242井進行了現場實驗.該技術採用強動載波在地層深處疊加的方法，造成壓脹條件，松動巖石，增大近井帶滲透率，提高油井產量.施工后，該井產量增加為原來的4倍多.本次實驗工藝上是成功的，首先是按設計要求引爆了炸藥，其二是由於採取了保護措施，使套管變形局限在施工段處，不影響下泵，不影響油井生產;套管強度校核分析也證明了套管不會破壞.施工后地質效果明顯
  9. To add " because of the continuous ageing of the population " after " increasing demand for health care services in hong kong in recent years " ; to add " and it is even more difficult for the social welfare sector to recruit nursing staff due to the implementation of the lump sum grant subvention system, thus seriously affecting the quality of elderly and rehabilitation services ; " after " the number of nurses would still fall short of the demand in the coming years ; " ; to add " and in the social welfare sector " after " this council is worried that the quality of nursing services in public hospitals " ; to add " nursing " after " devising a comprehensive and long - term plan for " ; to delete " nursing services ; " after " human resources for general and psychiatric " and substitute with " services as well as for the social welfare sector, including a comprehensive survey on the manpower demand for nurses ; immediately conducting a comprehensive review of the lsg subvention system implemented in the social welfare sector, and ensuring that sufficient nursing staff can be recruited in the market by organizations providing elderly and rehabilitation services with a view to enhancing service quality ; " ; to delete the original " and substitute with " ; to add " for public hospitals as well as for elderly and rehabilitation services " after " manpower ratio between nurses and clients of nursing care " ; to delete the original " and substitute with " ; to delete the original " and substitute with " ; to add " and in the social welfare sector " after " promotion prospects of nurses in public hospitals " ; to delete the original " and substitute with " ; and to add ", in particular the common practice of assigning health workers to undertake certain nursing duties in the social welfare sector, " after " facing up to the problem of de - nursing "

    在"近年本港醫療生服務需求不斷上升"之前加上"由於人口持續老化， "在"護士數目于未來數年仍求過于供"之後加上"由於社會福利界實行整筆撥款津助制度，聘請護士人手更加困難，嚴重影響安老及復康服務的質素"在"本會擔心公營醫院"之後加上"及社會福利界"在"就本港普通科"之後刪除"及" ，並以"代替在"精神科"之後加上"及社會福利界"在"全面及長遠的規劃"之後刪除" ，並以" ，包括就護士人手需求進行全面調查二立即全面檢討在社會福利界實行的整筆撥款津助制度，並確保安老及復康服務機構能夠在市場聘請足夠護理人手，以提升服務質素"代替刪除原有的"二" ，並以"三就公營醫院和安老及復康服務"代替刪除原有的"三" ，並以"四"代替刪除原有的"四" ，並以"五"代替在"改善公營醫院"之後加上"及社會福利界的"刪除原有的"五" ，並以"六"代替及在"正視去護士化問題， "之後加上"特別是社會福利界由保健員擔當部分護士職務的普遍做法， " 。
  10. In the recent year although bcf has seen a great increase of its profit, tax and export, it still has a long distance to go comparing with the high demand of the competitive domestic and international market in the field of the reshuffling of the product structure, the increase of the product, the renewing of the apparatus, the enlarging of the market, the innovation of management and so on

    主要產品以國際流行的混合型卷煙為主，擁有多項生產技術專利。近年來，雖然北京卷煙廠的利稅、出口都有較大幅度增長，但是在產品結構調整、產量增長、設備更新、市場擴大、管理創新等方面距離國際和國內市場激烈競爭的要求還有較大差距。
  11. It is found that the fwm field can cause the asymmetry of electromagnetically induce transparency profile. in addition, the effect of different propagating orientations of probe field on the electromagnetically induced transparency is also discussed. in the molecular multi - level system with the perturbed superposition levels, we discuss the electromagnetically induced transparency, spontaneous emission enhancement, double dark resonance and double electromagnetically induced transparency by using the density matrix equation under weisskopf - winger approximation and dressed - state density matrix equation

    針對實際的實驗條件，考慮了一種影響量子干涉的新的因素-四波混頻場，研究了四波混頻場對雙光子探測的-型能級體系的eit的影響，發現四波混頻場能夠導致雙光子探測的eit線型的不對稱，在此基礎上，討論了不同探測場的傳播方式對eit的影響，針對分子中實際存在的包含有微擾能級的不同多能級系統，我們分別採用綴飾態繪景下的密度矩陣方程和weisskopf - wigner近似下的密度矩陣方程詳細地討論了電磁感應透明、自發輻射的干涉相消和相長、雙暗態共振和雙電磁感應透明現象。
  12. Production per sow and growth rate per growing - finishing pig increased in the last decades with a huge variation between farms

    近幾十年來，每頭母豬的生產能力和生長肥育豬的生長速度提高很多，但是不同的養殖場間差異很大。
  13. During their visit to jinlu vegetables co., ltd., a vegetable processing business located in pengzhou, ms. jin lebi, head of the company, depicted her experience of participating in the training delivered by sfagm. for example, she discussed how it helped the enterprise out of difficulties by shifting business ideas and improving managerial techniques. when learning that this business had just been awarded the silver prize at the western china agriculture exposition, mr. chen, director of the division of american and oceania, encouraged her to bring her products to the agriculture exposition to be held in beijing next year to further enhance the popularity of those products so as to help local farmers into a much larger market

    在參觀彭州蔬菜加工企業金綠山珍食品有限公司時，企業負責人金樂碧女士講述了她參與小農戶項目培訓的體會，比如通過轉變經營觀點和提高管理技能來幫助公司走出經營困境當聽到該企業產品最近剛榮獲中國西部農博會銀獎的事跡，農業部國際合作司的陳處長鼓勵她明年將產品帶到北京的農博會上，進一步擴大產品的知名度，從而帶動當地農民進入一個更為廣闊的市場。
  14. In this paper, micro - cavity semiconductor laser ( mcsl ) with pillar vertical - cavity surface - emitting structure ( vcsel ) which has potential applications in optical communication and optical interconnect is theoretically analyzed, the calculation model that used to discuss the modal performance of rectangular columnar and cylinder vcsel with oxidized aperture is established by using vector field model. the numerical simulations in the case of cylinder structure show oscillating wavelength and threshold gain against inside and outside radius of laser, the layer refractive index and pair number of bragg mirror, thickness, position and oxidized material ' s refractive index of oxidized aperture, in detail. more practically, considering dos shell of laser as non - perfect one, or supposing that dos shell is separated from the laser, we can obtain more significative results

    本工作以矢量場模型出發，對具有誘人應用前景的柱形垂直腔面發射結構（ vcsel ）的微腔半導體激光器（ mcsl ）進行了理論分析，建立了用於分析方柱形和圓柱形結構具有氧化孔徑層的激光器的模式特性的理論模型；對圓柱形結構情況進行了數值模擬，得到了振蕩波長、閾值增益隨激光器內外半徑、 bragg反射鏡層折射率、周期數以及氧化孔徑層厚度、位置和氧化物折射率的詳細變化規律；為使理論計算更接近實際，將外加金屬包殼視為非理想導體，或將金屬包殼與激光器結構隔開，分別對這兩種情況下的結果進行了討論。
  15. The spot responder system which is the necessary part of ctcs is analyzed in the dissertation and three key technologies of the channel in the responder system are researched. firstly, a new kind of rectangular plate magnetic inductive loop antenna is designed to transmit the power frequency. researching the near field inter - inductive characters, the relationship among the inductive efficiency, the perimeter and the conductor width of the antenna is found out

    本文在對ctcs中的點式應答器系統原理及組成進行分析和消化的基礎上，對系統中通道的幾個關鍵技術進行了詳盡的研究，主要分為三個方面: 1 ，提出並研製了新型的片式環形磁感應天線，並對傳輸能量載波的天線的近場互感特性進行了分析，得到互感效率隨天線的周長大小以及導帶寬度的變化規律，並通過計算機模擬和試驗對天線的近場波瓣圖進行了研究;通過分析寬帶匹配技術中的實頻法理論，設計了信號載波天線的寬帶匹配網路。
  16. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  17. The conclusions are as follows : the ultrasonic intensity is proportion to the laser intensity ; the ultrasonic induced by a laser line source has much more advantages than by a laser point source, such as stronger energy, higher snr, more directivity and shape ; the intensity of cfpi ' s output signal is linear with ultrasonic vibration velocity, and is effected by incidence angle and scattered angle ; snr will increase by reducing cfpi ' s bandwidth, reducing incidence angle, increasing cavity ' s length and reflectivity

    在分析點光源激勵聲表面波機理的基礎上，求出了線光源激勵的超聲振動的位移表達式，發現線光源激勵的近場區表面波具有波形好，信噪比高，指向性好，幅度強等特點。通過理論推導，得出共焦fabry - perot干涉儀的輸出光強除了與樣品表面的振動速度成正比，並與入射角和散射角有關；適當減小cfpi的帶寬，增加腔長，增大鏡面反射率，或者減小檢測入射角都可以提高系統的信噪比。
  18. Scanning near - field optical microscope ( snom ), as a kind of new important optical apparatus that is used to observe appearance or investigate immanent essence of sub - wavelength objects, has been played a crucial role in the wide range of physics, chemistry, biology, medical science, geology, it estate in last years. one of difficulties of conventional snoms is the relatively low power of out signal

    近場光學顯微鏡（ snom ）作為一種用於觀察和研究亞波長物體的外觀形貌和內在性質新的重要光學儀器，于近幾年來，在納米和介觀尺度上，為物理、化學、生物、醫學、地質和信息產業等的研究和生產提供了許多新的知識，也極大地推動了近場光學的發展。
  19. In the first part of paper, we introduce the appliance of doppler weather radar in meteorological work in the near future, and simply enumerate all kinds of adjoint methods to retrieve data of radar. in the second part of paper, we choice some methods that are usually used domestically and overseas, compare excellence and flaw of the methods by using data of simulate wind field, analyze synthetically the precision of simulate result, the length of retrieval time and the structure of data distributing, lastly decide to regard ameliorated quasi - 4d adjoint method as retrieval technology in the paper. in the third part of paper, we retrieve the data of single doppler weather radar in hefei, anhui province, then calculate 3d wind field, streamline field, divergence, vorticity, helicity, moisture flux, divergence of moisture flux and potential vorticity from the result of retrieval

    文中第一部分對近年來多普勒天氣雷達在氣象工作中的應用作了介紹，同時簡單的羅列了反演雷達資料的各種變分方法；接下來在第二部分選取了幾種國內外常用的反演方法，利用模擬的風場資料比較各種方法的優缺點，從模擬結果的精度、反演時間的長短、資料的分佈結構上綜合分析，最後決定將已做改進的準四維變分分析方法作為本文的反演工具；第三部分就是反演安徽合肥多普勒天氣雷達資料，然後由反演得出的風場計算了各個時間各個層次的三維風速、流場、散度、渦度、螺旋度、水汽通量、水汽通量散度和位渦。
  20. A theoretical analysis is made on the influence of probe ' s near - zone length to the sensitivity and accuracy of ultrasonic inspection for the pipe welded seam, the issues in actual application of ultrasonic inspection technology is studied and the general countermeasures to increase the accuracy of ultrasonic inspection technology are given in the article

    摘要從理論上對超聲波近場區長度影響管道對接環焊縫檢測靈敏度和準確性進行了分析，研究了超聲波檢測技術在實際應用中存在的問題，給出了提高超聲波檢測準確性的一般對策。
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