hfa 中文意思是什麼
hfa
解釋
氟烷；氟代烷烴-
Ha possesses well biocompatibility, which has been discovered through test and in clinical application. however, the relatively large dissolution or resorption rates of ha will result in the failure of the implants. fluoridated hydroxyapatite ( hfa ) in whose structure f " occupies partially the position of oh " in ha, is expected to be more resistant to body fluid and less soluble than ha and still possess almost the same bioactivity as ha
生物活性羥基磷灰石薄膜（ ca _ （ 10 ） （ po _ 4 ） _ 6 （ oh ） _ 2 ， ha ）廣泛地應用於鈦合金硬組織種植體表面改性，臨床應用發現ha薄膜具有很好的生物相容性，但是ha薄膜在體內溶解速度有時可能會過快，引起種植體在體內失效，因此， ha薄膜長效性方面有待于提高。 -
We have prepared a series of neodymium binary / ternary complexes, such as nd ( acac ) 3 ' 2h2o, nd ( tfa ) 3 ' 2h2o, nd ( hfa ) 3 ' 2h2o, nd ( dbm ) 3 ' h2o, nd ( acac ) 3phen, nd ( tfa ) 3phen, nd ( hfa ) 3phen, nd ( dbm ) 3phen, nd ( tta ) 3 ( tppo ) 2, nd ( hfa ) 3 ( tppo ) 2, nd ( acac ) 4hpy, nd ( tta ) 4hpy and ndq3. the effects of organic ligands, synergistic coordination agents and different substitution groups for - diketones on effective line width and photoluminescence intensity of neodymium complexes were investigated. the photoluminescence spectra indicate that synergistic coordination agents can shield neodymium ion and impede water molecules penetrating into inner coordination shell to satisfy large coordination number of nd3 + during hydrous synthesis process, so the luminescence intensity of neodymium ternary complexes is stronger than that of neodymium binary complexes
發光光譜研究表明，由於協同試劑的參與，屏蔽了水分子參與配位，降低了羥基（ oh ）對釹離子激發態能級~ 4f _ （ 3 2 ）的猝滅，三元配合物的熒光強度均比二元配合物強，其中配合物nd （ tta ） _ 3 （ tppo ） _ 2在1340nm處的熒光強度最強，適合作為摻雜的光學活性物質，來制備有源光波導材料；在有水工藝條件下，單純地氟化配體未必能提高釹配合物的近紅外發光性能。 -
Health for all strategy hfa strategy
確保人人享有健康戰略 -
The films were characterized by diffraction, x - ray photoelectron spectroscopy, scanning electron microscopy, secondary ion mass spectrometer to research their hfa phase, morphology, fluorine content and fluorine distribution
在實驗中運用xrd 、 xps 、 sem 、 sims 、 sem等技術對薄膜的相組成、表面形貌、氟含量以及氟分佈進行了分析和研究。 -
This thesis discusses the definition and implementation methods of hierarchical federations, and brings forward the technique of automatically constructing the hierarchical federations architecture ( hfa ). based on the study of time management and data distributed management in hierarchical federations, we give the constraint conditions, which need to be met for achieving correct temporal delivery of time - stamped messages and causal ordering of those messages. we propose the process of time advancement in hierarchical federations, and present the hierarchical data filtering mechanism, which can effectively decreases the network traffic
論文研究了層次聯邦的概念及其實現方法，提出了層次聯邦體系結構的自動生成技術；然後研究了層次聯邦中的時間管理和數據分發管理，提出了為保證消息傳遞的時間和因果順序的正確性需要滿足的約束條件，給出了層次聯邦的時間推進過程；提出了層次聯邦中能有效減少網路流量的數據分層過濾機制。
分享友人