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。
It has big wheels, vanes in the bonnet. brush aluminum grills in the sort of stubbly coothardy chill
她的大輪圈，發動機罩里的葉
片，還有那鋁制的
柵格實在是令人心寒。
The paper made an ecological anatomy, a cultivation experiment on the lime - soil habtat and an analysis on the diurnal variation of photosynthetic an transpiration rate from three aspects of morphology, transplantation, physiology. the conclusion is that : ( 1 ) from the viewpoint of morphological anatomy, it has typical xerophyte structure such as strong root system, small leaf area, dense floss under the leaf surface, high stomatal density, the small opening degree, developed vessels and palisade tissues etc
從形態學、栽培學和生理學三方面對迷迭香進行生態解剖、石灰土上的栽培實驗以及光合蒸騰速率日進程的分析，得出以下結論： （ 1 ）在形態解剖上：迷迭香具有發達的根系，較小的葉面積，葉
片下表面密被絨毛，氣孔密度大，開度小，厚的角質層和發育良好的木質部和
柵欄組織等典型的旱生結構。
I plant located in the country ' s largest production base metal screen, guarding block mass production, circuit block, gelizha, net films, the main products for the highway, railway, gardens, streets, municipal, sports venues and building
我廠位於全國最大的金屬絲網生產基地，大量生產護攔網、圍攔網、隔離
柵、網
片等，產品主要用於高速公路、鐵路、園林、街道、市政、體育場所、建築等。
Drought resistances of leaves of 13 rasberry and blackberry were measured based on 7 xeromorphic indexes, including thickness of leaves, ratio of palisade tissue thickness to cutis tissue, thickness extent of palisade cell density, thickness of cuticular, thickness of two sides of cutis
摘要選取7項葉
片旱生結構指標（葉
片厚度，
柵欄組織厚度葉肉組織厚度，細胞密集度，角質層厚度，上、下表皮厚度） ，觀察測定了13個樹莓和黑莓品種的葉
片的相關指標。
The paper introduces a method of design and realization that is based on the single chip computer 8051, which adopts straight line grating sensor and realizes the three - coordinate high accuracy system of dynamic check and displacement measurement of nc machine
摘要介紹了一種以單
片機8051為核心，採用直線光
柵位移傳感器，實現數控機床三坐標位移高精度動態檢測系統的設計方法。
One cooling method that has gained increasing importance is endwall film - cooling, where coolant air is discharged though discrete holes in the inner and outer endwalls of a turbine blade passage. after leaving the holes, the coolant forms a protective layer between the hot mainstream gas and the surface that is to be protected
目前廣泛採用的一種重要冷卻方法是渦輪葉
柵端壁氣膜冷卻，該方法中冷空氣穿過渦輪葉
片上內外端壁離散冷卻孔進行交換，且冷空氣流經冷卻孔后在主流熱空氣與被保護表面之間形成保護層。
The numerical flutter analysis system was formed by the three - dimensional numerical simulation of the vibrating cascade flow combined with the structural dynamics analysis of vibrating blade
將振動葉
柵三維流動數值模擬與振動葉
片結構動力學分析相結合，建立了葉
片顫振數值分析系統。
The 3 - d flow field is changed completely in a forward - swept compressor cascade, which makes the low energy fluid redistribute in the flow passage
葉
片前掠改變了葉
柵的三維壓力場，使得低能流體重新分配。
To utilize property of saws propagating, it can be made including delay lines, passband filters, oscillators and pitch filters. surface transverse wave ( stw ) was used the configurature of reflective metal - strip grating between the two interdigital transducers, and made the shear horizotal ( sh ) wave on the surface of the piezoelectric substrate, but not to deep in
聲表面橫波（ surfacetransversewave ，簡稱stw ）是採用在兩個金屬叉指換能器之間加入短路
柵的隔離板結構使剪切水平波（ shearhorizontalwave ，簡稱sh波）被嵌制在壓電基
片表面上，而不是沿壓電基
片內傳播的聲表面橫波形式。
Gained same data with literature. paper based cascade scatter matrix field matching equation. program currency frame grating programme. obtain several design project of high power and high efficiency grating - circular polarization
分析了薄
片型光
柵圓極化器的傳輸特性和極化特性，數值計算的結果與文獻給出的實驗測得結果具有較好的一致。
Fences - specification for open mesh steel panel fences
柵欄.開放篩網鋼
片柵欄規范
Mechanical standardization of semiconductor devices - part 6 - 5 : general rules for the preparation of outline drawings of surface mounted semiconductor device packages ; design guide for fine - pitch ball grid array
半導體器件的機械標準化.第6 - 5部分:表面安裝半導體器件外殼外形圖繪制的一般規則.小螺距刃
片柵格排列的設計指南
Mechanical standardization of semiconductor devices - part 6 - 6 : general rules for the preparation of outline drawings of surface mounted semiconductor device packages ; design guide for fine pitch land grid array
半導體器件的機械標準化.第6 - 6部分:平面式安裝半導體器件外殼外形圖繪制的一般規則.小螺距刃
片柵格排列的設計指南
Mechanical standardization of semiconductor devices - part 6 - 6 : general rules for the preparation of outline drawings of surface mounted semiconductor device packages - design guide for fine pitch land grid array
半導體器件的機械標準化.第6 - 6部分:半導體器件包裝用表面安裝略圖制備的一般規則.小螺距刃
片柵格排列的設計指南
Sighing, he began to white wash the fence but did not enjoy it
他嘆著氣，開始粉刷那片柵欄，但他一點都不喜歡干。
