reduction density 中文意思是什麼
reduction density
解釋
換算密度-
W - cu composites prepared from the precipitation w - cu powder have higher sintered density, better mechanical and physical property, more homogeneous and finer microstructure than those prepared from w - cu powder by the balling - reduction method. in chapter 5, a combination of homogeneous precipitation and ball - milling process, namely the mechano - thermochemical process was employed to prepare ultra - fine w - cu powder
其中，球磨w一cu復合粉（ hp一m ）壓坯在1150下燒結30min后，可獲得相對密度大於99 %的幾乎全緻密的超細晶粒w一cu復合材料， w的顆粒度小於0 . 5林m 。 -
The model allows for a reduction in density on the tamar site, showing that the main 20 story high - rise can be removed and replaced with open space. this answers the call by many to preserve government hill by accommodating the various departments and bureaus of government at the current central government office site and murray building
這模型可減低添馬艦地區密度，移走二十層高的建築物，讓該地方有更廣闊的空間，這亦回應了一些倡議保留政府總部人士的訴求，讓各政府部門繼續沿用美利大廈的辦公室及政府總部。 -
In this thesis, a strain of associative nitrogen fixing bacteria with high nitrogenase activity was selected and the further studies for it were conducted, the results obtained are as follows : selection and identification of associative nitrogen fixing bacteria with high nitrogenase activity. the nitrogenase activities detected by means of the acetylene reduction method and growth rates tested by optical density of germ suspension under the x 400nm ( od4oo ) of all the strains tested except for the strain w12 reduced gradually due to frequent subculture during a year. however, the strain w12 has been showing high and stable nitrogenase activity and growth rate since it was isolated five years ago
固氮菌株的篩選與鑒定：測定從不同來源分離、收集和保藏的12個固氮菌株或分離物在不同保存時期的固氮酶活性和生長能力，發現多數菌株在初分離得到時固氮酶活性較高，但隨著轉接次數的增多卻逐漸喪失固氮酶活性，生長也隨之減弱，只有w12在五年前從埃及分離得到至今一直保持旺盛生長勢和較高的固氮酶活性， 48h內乙烯生成量可達1800nmol乙烯ml菌液以上，遠遠高於其它菌株，其生長量（ od _ （ 400 ）值）也遠遠高於其它菌株。 -
The discharging sediment with density current is an only measure to reduce reservoir region " s deposition in the reservoir with storage operation on the overloaded river and an important mode to discharge sediment for deposition reduction as well
異重流排沙是多沙河流上的水庫蓄水運用時唯一能夠減少庫區淤積的措施，也是水庫排沙減淤的一種重要方式。 -
A modified definition of polarization resistance calculated from the equivalent circuit of eis make its value dependent on the grain size. in anodic polarization test ( sweeing and stair - steps ), the maximum ( critical ) current density increases while the passivation potential and breakdown potential lowers with the reduction of the grain size. fegsem images showed the grain growth and pitting corrosion of the nc copper surface, uniform corrosion in the mc copper surface and the broken passivation layer in both surfaces
在陽極極化實驗（包括掃描法和臺階法）中，致鈍電流雖晶粒尺寸減小而增大，而致鈍電位和擊穿電位都隨著晶粒細化而降低。 fegsem照片發現了納米晶銅的晶粒長大和孔蝕，微米晶銅表面的均勻腐蝕，和兩種銅表面破碎的鈍化膜。 -
This paper presents an investigation on a new type of rubber damper, that is, a rubber damper with honeycomb structure. the honeycomb structure will enhance the energy dissipation of a rubber damper and as a result increase the damping of the damper. the performances of honeycomb dampers are experimentally tested by a test rig. the results show that the diameter and the density of holes of the honeycomb structure are important parameters in the design of the damper. for a damper of given size, there are optimum values of both parameters with which the damper provides highest damping. additionally the honeycomb structure does not change the correlation of damping to frequency. a practical honeycomb damper is designe d and applied to inlet pipe of a screw compressor in a petroleum factory for vibration reduction. the vibration of the pipe is obviously suppressed by the damper, at least 25 %
本文採用理論分析和實驗相結合的方法，研究了蜂窩孔這種結構因素對橡膠阻尼材料阻尼性能的影響。在自行設計、製作的懸臂式阻尼測試實驗裝置上，對蜂窩式橡膠阻尼器的阻尼性能進行了大量的實驗測試，初步找出了蜂窩孔孔徑、孔數以及預壓縮量等因素與阻尼器阻尼性能的關系。本文利用實驗研究的結論，設計了一種專用的蜂窩式橡膠阻尼器，並應用於某廠螺桿壓縮機進口管道的減振，取得了明顯的減振效果。 -
The conclusions are as follows : ( 1 ) high - pressure water - atomization can be used to produce a pre - alloyed steel powder with high apparent density, high green strength, size - stability after sintering and low hydrogen - loss content ; ( 2 ) the higher smelting temperature and / or water pressure, the finer particle size of steel powders ; ( 3 ) when the atomization angle holds in a reasonable value ' s range the obtained powder will have a better particle size distribution ; ( 4 ) an optimum atomization technological parameters : liquid steel flux, water pressure and water prick angle was obtained ( 5 ) reduction variables ( temperature, holding time, material - bed ' s thickness and reducing gas flux ) have a significant effect on the particle agglomeration and properties of final powder was given ( 6 ) different alloying methods were developed to modify properties of ferrous powder materials and hence to broaden its applications in ferrous powder metallurgy industry
本文系統研究了水霧化預合金鋼粉生產工藝及合金化方法對鐵基粉末冶金材料性能影響，詳細研究了冶煉、霧化、還原工藝參數對預合金鋼粉化學成份和物理性能影響，並得出如下結論： （ 1 ）採用高壓水霧化技術可用於生產高密度、高強度、尺寸穩定性的低氫損含量的水霧化預合金鋼粉。 （ 2 ）冶煉溫度越高，高壓水壓力越大，所得生粉顆粒粒度越細。 （ 3 ）水錐角調整在一個適當角度范圍內可獲得粒度組成較好的生粉。 -
We consider that the complexes of bmon ( m, n > 1 ) or the point defects induced by heavily boron doping may be involved in the nucleation of oxygen precipitates at high temperature range of crystal cooling. therefore it is reasonably deduced that the density of voids in hb cz silicon increases and the size of voids decreases due to the reduction of vacancy concentration as a result of heavy boron - doping enhanced oxygen precipitation prior to the void formation
在實驗事實的基礎上，我們認為在重摻硼硅單晶生長過程中， bmon （ m ， n 1 ）復合體或摻b引起的點缺陷能在晶體冷卻過程中的較高溫度階段形成，且在隨后的退火過程中能穩定存在，作為氧沉澱形核的核心，從而促進了氧沉澱，減小了大直徑硅單晶中void缺陷的尺寸，增加其密度。 -
In dot etching, the photographic construction of individual dots to provide a proper density gradient suitable for dot size reduction
中義在網點修整中，個別的網點結構依網點大小提供適當的濃度變化。 -
Spread spectrum technique, which can handle variable adverse environments, exhibits unique qualities that have a number of advantages in anti - jamming, anti - noise, reduction of multi - path interference, low power spectral density, privacy, selective addressing and code division multiplexing
擴頻通信技術具有優越的抗干擾、抗噪音、抗多徑衰落性能，能在低功率譜密度下工作，具保密性、可多址復用和任意選址，能有效克服各種惡劣的通道特性，目前廣泛應用於移動通信、雷達、導航、測距、電力線通信等領域。 -
The reduction of soil nutrient content and enzyme activity, and the apparent increase of soil acidity and bulk density are likely the main reason for soil degradation in mature stand
土壤養分和酶活性的降低以及土壤酸度和容重的顯著增加是成熟林土壤質量降低的主要原因。 -
The reduction in size of components and circuits for increasing package density and reducing power dissipation and signal propagation delays
減少元件和電路的幾何尺寸，以達到增加電路的封裝密度、減少功耗和減小信號傳播延遲的目的。 -
One is the performance of data mining algorithms degrades, the other is many distance - based and density - based algorithms maybe not effective. these problems can be solved by the following methods : l ) transport the data from high dimensional space to lower dimensional space by dimensionality reduction, then process the data as lower dimensional data. 2 ) to improve the performance of mining algorithms, we can design more effective indexing structures, adopt incremental algorithms and parallel algorithms and so on
解決的方法可以有以下幾種：一個可以通過降維將數據從高維降到低維，然後用低維數據的處理辦法進行處理；對演算法效率下降問題可以通過設計更為有效的索引結構、採用增量演算法及并行演算法等來提高演算法的性能；對失效的問題通過重新定義使其獲得新生。 -
Exercise can also prevent " shrinkage " in elderly people. " shrinkage " is a phenomenon in which the elderly suffer from a reduction in height. their spine become curved and muscle become wasted. reduction in height takes place when bones lose density, causing the spine to shorten
運動更可防治老縮，老縮是由於體高減低、脊骨變曲及肌肉收縮造成，體高減低主要原因是脊骨產生骨質疏鬆現象，脊骨長度因而縮短。
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