Pure iron specimens were implanted by nitrogen ions with a fluence of 7×1017 ions/cm2 using ion beam implantation at an extracted voltage of 40kV.Composition and valence studies were carried out by X-ray photoemission spectroscopy;Glancing angle X-ray diffraction was employed to examine the phase transformation.

采用40kV的氮等離子體離子注入工業(yè)純鐵，注入劑量為7×1017ions/cm2一级黄色视频免费观看，X射線光電子能譜研究表面注入層元素的成分和價態(tài)亚洲精品一，X射線衍射分析注入層的物相轉(zhuǎn)變，采用恒電位極化腐蝕試驗研究了離子注入后材料在人工模擬體液中腐蝕行為俄罗斯网站人人草人人干在线观看。

Glassiness SiO2 layer is formed on the surface of coatings after exposure long time,which can isolation of oxygen and fills in interstice on the surface of coatings.

采用加入其他元素的方法使硅化鈮改性可達到減少穿透硅化鈮涂層微裂紋的生成和降低鈮基材氧化速度的目的网页升级自拍偷拍，但使用溫度一般不超過1 300℃[1~3]98在线视频。

Firstly, four geometric loop equations are set up by using vector method in complex number fields. Secondly, three constraint equations are used to construct the Dixon resultants, which is a 6×6 matrix and contain two variables to be eliminated. Extract the greatest common divisor of two rows and two columns of Dixon matrix and compute its determinant to obtain a new equation. This equation together with the forth constraint equation can be used to construct a Sylvester resultant.

首先使用矢量法和復(fù)數(shù)法建立4個幾何約束方程式；再使用Dixon結(jié)式法對3個方程式構(gòu)造一個含有2個變元的6×6 Dixon矩陣www,se，提取其中2行列元素的公因式久久国产AV人人做人人爽，將新矩陣的行列式展開后得到二元高次多項式方程亚洲成av人仙踪林，該方程與剩下一個方程使用Sylvester結(jié)式消去一變元久久艹视频，得到一元高次方程。

Using radiotracking, we counted the home range of Tree Sparrow is about 7600m〓 by 90% harmonic mean transformation.

北師大和首鋼的環(huán)境狀況有些類似欧美黄色性交网站，除了首鋼麻雀的腹羽中Cd（p=0.026*）和Mn（p=0.007**）含量明顯高于北師大外97国产一区二区精品久久呦，其余元素的含量均不存在顯著差異。

However, this co-operation is difficult, firstly because the elements of the factory are heterogeneous.

然而韩国午夜理伦三级2020不卡，這個合作是困難的国产美女真人天天爽一级，首先因為元素的工廠是異構(gòu)的。

The mixture of images within each of my paintings is like a combination of elements in life.

我的每一幅作品里的圖像混合都是生活元素的組合亚洲欧美福利一区二区三区。

It is precisely this incommensurability of these elements of life that gives them the right not to he compared with any particular equivalent and that gives to life an irreplaceable charm and wealth.

恰恰是這些生活元素的不可相互化約性給予自身不能與任何特定等價物相比較的權(quán)利在线观看无码AV直接进入，并由此給予了生活一種無可替代的魅力與財富。

Our solution is another tip: using None as an index has the same effect as a missing index, so you can get the same functionality programmatically, i.e., when you are using a variable to index through a sequence but also want to be able to access the first or last elements

我們的方案是使用另一個小技巧：用None作為索引值日韩一区二区黄色大片，這樣一來就可以滿足你的需要98K免费毛片，比如說，在你想用一個變量作為索引來遍歷從第一個到最后一個元素的時候

The intersecting positions of aeromagnetic lines of different directions and depths were calculated, and characteristics of the integrated anomaly of different elements were described. The fuzzy membership map for the porphyry copper deposit was compiled.

通過模糊推理計算得到該區(qū)不同高度最新成年人黄色网站、不同方向航磁解譯構(gòu)造的交匯部位以及不同元素的組合異常特征无码精品视频在线观看网址，最終確定了該區(qū)可以發(fā)現(xiàn)斑巖型銅礦的模糊概率分布圖。

This is used to calculate the astronomical elements Kepler track procedures used MAtlab prepared, Welcome oh.

這是用于計算天文中的開普勒軌道元素的程序一区二区色综合，用MAtlab編寫的欧美性交播播，歡迎使用哦。