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谁能介绍一下Wyckoff Position

2023-07-19 20:36:46
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里论外几
Wyckoff位置(Wyckoff Positions)用来表示晶胞中等价原子的对称性的,Wyckoff Positions包括多重度(Multiplicity),Wyckoff 字母(Wyckoff Letter), 位置的对称性(Site Symmetry)以及该位置的分数坐标。其中前面所说的”1a 2b 3c 16f...“实际上就是Wyckoff字母,一般它是由a开始往下写:b,c,d,...一直到最大的字母。最大的一个字母所代表的那个位置上的多重度最大,因为这些位置上如果有原子,那么就会由对称操作转出最多数目的其他等价原子。这个最大的一个字母所代表的那个位置代表的是一般性的位置,故也称为” 一般性位置“(General position);其他多重度小的位置用较小序号的字母表示,这些位置都是特殊的几个位置(往往其分数坐标的一个或多个分量是特定值,这往往是对称元素的位置确定的),故也称”特殊位置“ (Special Position)。

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2023-07-19 13:54:171

如何获取listview的item中的内容

在listView里添加数据应该使用了BaseAdapter的子类,也就是某类适配器而在将ListView中的item的控件和数据相联系是由BaseAdapter中的getView()实现的一些简单的例子里面不用重写此方法,而比较复杂的item布局就需要去继承BaseAdapter,然后在getView()方法里去实现
2023-07-19 13:48:582

用英语写一封信,向你的朋友amy介绍中国的春节【60词左右】

Dear Amy,I"m very happy that you are interested in traditional Chinese festivals. There are many traditional festivals in China,such as Spring Festival, Mid-Autumn Day and so on. I"d like to introduce the Spring Festival to you. Spring Festival is the most important traditional holiday in China. It usually lasts for 15 days. Days before the festival,people clean their houses. They think cleaning sweeps any bad luck. They decorate their houses with paper cuts. Then they watch the Spring Festival Gala on TV. At midnight,they set off fireworks to welcome the new year. During the festival,kids get lucky money from old people. People visit their relatives and friends. They wish each a happy year and good luck. How happy we are.Best wishes!Yours,***
2023-07-19 13:49:002

英国摇滚绿洲乐队 supersonic 超音速 绿洲乐队的歌词

这是Oasis绿洲的 http://www.goalyrics.com/cn/songs-4788.html这是supersonic超音速的http://www.goalyrics.com/cn/search.php?keyword=supersonic&field=1&x=27&y=20
2023-07-19 13:49:012

python几种去掉字符串中间空格的方法

1.strip():把头和尾的空格去掉2.lstrip():把左边的空格去掉3.rstrip():把右边的空格去掉4.replace("c1","c2"):把字符串里的c1替换成c2。故可以用replace(" ","")来去掉字符串里的所有空格5.split():通过指定分隔符对字符串进行切片,如果参数num 有指定值,则仅分隔 num 个子字符串
2023-07-19 13:49:022

大兴的解释

大兴的解释(1) [go in for large-scale construction]∶ 大规模 开展或从事 大兴土木 (2) [energetically]∶大规模或有力地 大兴调查 研究 之风 词语分解 大的解释 大 à 指面积、体积、容量、数量、强度、力量超过一般或超过所比较的 对象 ,与“小” 相对 :大厅。大政。大气候。夜郎 自大 。 大腹便便 。 指大小的对比:这间房有那间两个大。 规模广, 程度 深, 性质 重要 :大局。大众 兴的解释 兴 (兴) ī 举办,发动:兴办。兴工。兴学。兴建。兴叹(发出 感叹 声,如“望洋兴兴”)。百废待兴。 起来:夙兴夜寐(早起晚睡)。 旺盛 :兴盛。 兴旺 。 兴隆 。兴衰。复兴。 兴替 (兴衰)。 天下兴亡,匹夫有责 。
2023-07-19 13:48:511

怎么确定一个文件是否strip

使用file命令,没有file命令,找file的源码吧
2023-07-19 13:48:441

如何RecyclerView的item宽度设置

思路是:因为ViewHolder我们可以拿到每个Item的根布局,所以如果我们为根布局设置单独的OnClick监听并将其开放给Adapter,那不就可以在组装RecyclerView时就能够设置ItemClickListener,只不过这个Listener不是设置到RecyclerView上而是设置到Adapter。我们首先看ViewHolder的代码:public class MyViewHolder extends ViewHolder implements OnClickListener,OnLongClickListener{public ImageView iv;public TextView tv;private MyItemClickListener mListener;private MyItemLongClickListener mLongClickListener;public MyViewHolder(View rootView,MyItemClickListener listener,MyItemLongClickListener longClickListener) {super(rootView);iv = (ImageView)rootView.findViewById(R.id.item_iv);tv = (TextView)rootView.findViewById(R.id.item_tv);this.mListener = listener;this.mLongClickListener = longClickListener;rootView.setOnClickListener(this);rootView.setOnLongClickListener(this);}/*** 点击监听*/@Overridepublic void onClick(View v) {if(mListener != null){mListener.onItemClick(v,getPosition());}}/*** 长按监听*/@Overridepublic boolean onLongClick(View arg0) {if(mLongClickListener != null){mLongClickListener.onItemLongClick(arg0, getPosition());}return true;}}</span>因为在构造ViewHolder时,rootView将作为一个必传参数传递进来,所以我们只需要拿到rootView并给其绑定点击监听事件即可。下面要考虑的就是怎样把listener传递进来。Demo中设定了监听点击事件的Interface:MyItemClickListener:123public interface MyItemClickListener { public void onItemClick(View view,int postion); }MyItemClickListener模仿ListView的OnItemClickListener,开放了view和position两个参数,这对习惯使用ListView的开发者们使用起来更得心应手。从ViewHolder的代码中可以看到,执行onClick方法时会调用getPosition()将当前Item的位置回调给listener。getPosition()是ViewHolder的内置方法,可直接使用。
2023-07-19 13:48:391