base shield 中文意思是什麼
base shield
解釋
管座屏蔽-
Abstract : a calibration valve oil for hydraulic shield safety valves was formulated by a base oil obtained from the distillate of a deep - refining paraffinic crude with qualified additives
文摘:以深度精製的石蠟基餾分油為基礎油，添加具有改善油品性能的添加劑研製了液壓支架安全閥校閥油。 -
At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency
在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。 -
For this reason, this paper proposes the construction plan of expanding building metro station combined with natm ( new australia tunnel method ) on the base, of shield driven internal tunnel that has been built
為此，提出了在已經建成的區間隧道基礎上，結合新奧法進行擴挖而形成地鐵車站的施工方案。 -
The wielder ' s strength modifier ( if within 30 feet of the target ) and the shield ' s enhancement bonus, if any, add to the base damage
持用者的力量調整值（若目標在30 ?內）和盾牌的增強加值加在基本傷害上。 -
When a priest that can absourb are base damage off melee can now take away are beloved shield of laughs you got to take a minute and just relize this class is dead
當一個可以吸收和物理系一樣的傷害的牧師現在能把你最愛的聖盾微笑著拿走並且讓你要廢掉1分鐘的時候，這個職業也就死了。 -
When a priest that can absourb are base damage off melee can now take away are beloved shield of laughs you got to take a minute just relize this class is dead
當一個可以吸收和物理系一樣的傷害的牧師，能把你最愛的聖盾隨意著拿走，還讓你要廢掉1分鐘的時候，這個聖騎的職業也意味著死。 -
The time - frequency of the wavelet transform and the signal wavelet decomposition - reconstruction algorithm based on the multi - resolution analysis are analyzed. the signal local singularity under the wavelet transform are studied. the difference between between mallat ' s maximun modulus algorithm and donoho ' s waveshrink algorithm are analyzed, too. the denoise effect of different threshold and threshold function are studied. base on compare the advantage and disadvantage of donoho & johnstone threshold and believing - region threshold, a modified algorithm is developed : combining threshold distinguishing and shield filter method
討論了基於mallat理論最大模數方法以及基於donoho理論的閾值萎縮去噪方法的差別，研究比較了不同閾值規則與閾值函數對去噪效果的影響；在此基礎上，結合統一閾值和置信區間閾值各自的優缺點，提出閾值判別和屏蔽濾波相結合的方法。 -
Based on this project, a hardware control system of scr co _ 2 gas shield arc welding base on microprocessor msp430f449 was designed, and debugging had been completed
在此基礎上，設計了以單片機msp430f449為核心的晶閘管co _ 2焊機的硬體控制系統，並且進行了調試。
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