(-12/2)-{-(+6.5)-(-6.3)-6又1/5} 6.5左边的减号是12什么意思思6.5右边的-我知道 左边的是12什么意思思

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关注微信公众号ABOS DAY #47 A 1-3 (6/5 & 6/6) Daily Mastery Plan Flashcards -
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&&&ABOS DAY #47 A 1-3 (6/5 & 6/6) Daily Mastery Plan
Abos Day #47 A 1-3 (6/5 & 6/6) Daily Mastery Plan
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6 Cards in this Set
56yo M s/p1 yr p THA w/ the implant Fig A. He is concerned about the potential complctns.
He is asymptmtc. Which is accurate re: prosthesis & future care? 1- bi-annual LFTs measrd, as metal ion
2-risk CA dramatically inc'd; 3-no corrltn bw/ activity & serum
4.prosthesis design safe in women of child- 5-prosthesis design-& inc'd risk for dislctn::MOM THR activity level does NOT affect
metal ion levels.Ans3
80 yo M has a Charnley all-poly acetabular shell Fig A. When def'g failure as revision for any reason, what is the failure rate at 35 years for this type of prosthesis? 1-&10%; 2-20%-30%; 3-40%-50%; 4-50%-75%; 5-&75%
::77.3% survivorship for the component @ 21 yrs, w/ revision/definite loosening as an endpoint. 84% surviving @ 20 years without revision. there is a significantly inc'd probability of revision based on the age of the pt.Ans2
All are features: metal-on-metal THA allows for improved fluid film lubrication b/w compnts EXCEPT: 1-L 2-Slight clearance of fit b/w acetblr cup & 3-Min
4-Complt congruence fit b/w acetblr
cup & 5-Min surface roughness acetblr cup::Slight clearance, not complete congruence, is optimal. ideal fluid film lubrication regime minimizes friction. largr hd size & full-film lubrication.Ans4
All are true for pt who underwent a metal-on-metal (THA) EXCEPT? 1-they will have ionically c 2-highr CA risk than with metal-on-poly THA; 3-elevtd levels Co & C 4-elevtd levels of Co & Cr in urine
5-highr frictional torque& ceramic on ceramic THA:: To date, there is NO correlation b/w metal serum levels & CA risk. metal-on-metal THA has & frictional torque than ceramic on ceramic THA.Ans2
66yo M TKA w/ fixed bearg post stabiizd compnt.
intraop trialg components: flex gap-loose & ext gap-appropriate. If this is not corrected, what post-operative complctn risk? 1-S 2-P
3-P 4-O- 5-Patellar instblty:: If knee is too loose-flex, possbl fem compnt &jump the post& grt pos dislctn. Tx-revision surgery only way to correct sx flex instability.Ans3
dur'g TKA knee is stable at full extension, but it will not flex past 90 deg. Which adjustments can achieve satisfactory ROM & stability flex/ext? 1-Downsiz' 2-Pl 3-R
4--Downsiz' 5-Performg medial tib reduction osteotomy::TKA &flexion, 5 options: 1downsizg fem compnt, 2recessg PCL, 3inc'g
pos tib slope, 4 resectg more tib 5Ans4
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Ready To Get Started?宝宝8个月大,身高只有63CM,体重6.5KG是不是不正常?该怎么办?_百度宝宝知道按整数数组的最大堆定义,每次调整完后根结点的元素与最后个元素交换,继续下次调整,直到所有的结点调整完毕。
原数组为 7 6 3 5 4 1 2 满足最大堆定义,直接交换根节点元素
2 6 3 5 4 1 7,交换完毕
6 5 3 2 4 1 7,调整完毕
1 5 3 2 4 6 7,交换完毕
5 4 3 2 1 6 7,调整完毕
1 4 3 2 5 6 7,交换完毕
4 2 3 1 5 6 7,调整完毕
1 2 3 4 5 6
7,交换完毕,此时虽然已有序,但仍需进行最大堆调整,因为最大堆算法时间复杂度为nlog2n,会进行继续搜索调整
3 2 1 4 5 6 7,调整完毕,移动一次
1 2 3 4 5 6 7,交换完毕,移动两次
2 1 3 4 5 6 7,调整完毕
1 2 3 4 5 6 7,交换完毕
我一开始看错题,以为是一趟排序,所以选的0,如果是整个排序过程,3应该只移动了2次,就是最后3放入堆顶1次(下标从2变为0),然后跟当前堆的最后一个元素交换1次(下标从0变为2),一共2次。
大根堆来排序,则只需要2次移动3的下标,第一次在将3升到堆顶的时候,第二次则是将3与末尾元素交换的时候,
不知道答案的3从何而来。
考虑小根堆来排序,则需要4次:将原数组转化为一个小根堆,进而进行堆排序操作:
1.首先对原排序进行小根堆转换,则由(7,6,3,5,4,1,2)【大根堆】建立小根堆:
(7,6,3,5,4,1,2)-&(7,6,1,5,4,3,2)-&(7,4,1,5,6,3,2)-&(1,4,7,5,6,3,2)-&【下沉】(1,4,2,5,6,3,7)
,可见3的下标移动1次;
2.堆排序开始,先将堆顶元素与末尾调换,去除末尾元素后,对剩下的堆进行调整:
(1,4,2,5,6,3,7)-&(7,4,2,5,6,3,1)-&【去除末元素,用x占位之前的移除元素,不参与调整】(7,4,2,5,6,3,x)-&
【调整开始】(2,4,7,5,6,3,x)-&(2,4,3,5,6,7,x),可见3的下标又移动1次;
3.对堆顶与末尾元素调换,继续采用2的策略进行调整:
(2,4,3,5,6,7,x)-&(7,4,3,5,6,2,x)-&【去除末元素,用x占位之前的移除元素,不参与调整】(7,4,3,5,6,x,x)-&
【调整开始】(3,4,7,5,6,x,x),可见3的下标再次移动1次;
4.如果采用标准的堆排序策略,还需要将3与末尾元素交换,即(3,4,7,5,6,x,x)-&(6,4,7,5,3,x,x)-&...3的下标再移动一次。
注:粉红色代表已经排好序的,绿色代表交换的节点,砖红色代表没做改动的店
从图中可以看出来,3在交换4和交换5这两步中,位置都有变化,所以一共是2次
注意交换4这一步,本来交换之后,就是有序的,但是程序还会继续调整,直到所有节点调整完毕
排序是对一个数组而言,并不需要输出,也就是说,给一个乱序的数组,经过排序后,这个数组是升序的(一个数组就可以实现堆排序),如果要输出的话,直接把这个数组输出来就可以了。
即:如果需要升序排列,则要逐步大顶堆。因为根节点被一个个放在后面去了。降序排列则要建立小顶堆。
public class HeapOperate2 {
* 建立堆时只需要保证根结点小于两个子结点或者大于两个子结点,对两个子结点大小没有要求
public static void main(String[] args) {
int[] a = { 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3 };
//在堆排序之前,打印初始数组
//进行堆排序
heapSort(a);
//进行堆排序之后
public static void heapSort(int[] a){
//建立大根堆
buildMaxHeap(a);
for (int i = a.length - 1; i &= 1; i--) {
swap(a[0], a[i]);
maxHeap(a, i, 0);
private static void buildMaxHeap(int[] a) {
int half = a.length/2;
for (int i = i &= 0; i--) {
maxHeap(a, a.length, i);
private static void maxHeap(int[] a, int heapSize, int index) {
//找出index位置处左右孩子的位置left和right
int left = index * 2 + 1;
int right = index * 2 + 2;
int largest =
if (left & heapSize && a[left] & a[index]) {
if (right & heapSize && a[right] & a[largest]) {
if (index != largest){
//交换两个数据
swap(a[index], a[largest]);
maxHeap(a, heapSize, largest);
谢谢大家支持!
题目原地进行升序排序,意思是对数组进行堆排序后,数组由(7-6-3-5-4-1-2)变成
(1-2-3-4-5-6-7)。
因为大根堆每进行一次排序,都把当前根节点与最右后叶子节点交换,因此最大元素放到数组末尾,所以是指构建更新大根堆。
3的位置没发生改变吧
看了好长时间的堆排序,似懂非懂
每次交换完后对堆进行调整,重新调整为大根堆?然后再进行交换和调整
不知道理解的对不对
堆排序是位置一定,找该位置元素的排序方式。3本来就在自己本身位置上。由于采用的是堆排序,有建堆和排序过程。初始建堆时,3放入堆顶1次(下标从2变为0),堆排序归位时,跟当前堆的最后一个元素交换1次(下标从0变为2),一共2次。
考察堆排序的先后顺序,改变2次,画图分析即可。
如果最后一步 “3”出堆也算一次的话就是2次
移动7-5至底,均没动3,4移至底后3会移动到顶,然后再到底,共2次
麻痹啊,我在有序的时候就自动停止了,没把3放堆根
正确答案:2。
首先这里已经将数组整好了,是大根堆。
然后将第1和第n个交换,然后调整堆:1至n-1
交换:2 6 3 5 4 1 7
调整:6 5 3 2 4 1 7。
交换第1和第n-1个,然后调整堆:1至n-2
交换:1 5 3 2 4 6 7
调整:5 4 3 2 1 6 7
交换第1和第n-2个,然后调整堆:1至n-3
交换:1 4 3 2 5 6 7
调整:4 2 3 1 5 6 7
交换第1和第n-3个,然后调整堆:1至n-4
交换:1 2 3 4 5 6 7
调整:3 2 1 4 5 6 7
交换第1和第n-4个,然后调整堆:1至n-5
交换:1 2 3 4 5 6 7
调整:2 1 3 4 5 6 7
交换第1和第n-5个,然后调整堆:1
交换:1 2 3 4 5 6 7
所以综上,3移动了两次位置。
我觉得应该是1次,只是3移动到堆顶一次,然后3可以移除堆顶,3的移动就结束了,这样应该是一次的。
升序排序的话不应该用小根堆吗?
变了两次,2变为0,0又变为2
按照升序排序是大根堆排序,每次把数组中最大的元素放在最后。因为数组原始状态(7-6-3-5-4-1-2)是大根堆,不用初始化堆。依次把根与最后一个叶子结点交换。元素3在{1
2 3}的状态时与1交换,然后作为堆中最大的元素与1交换。总共两次。
按照升序排列是建小根堆的过程
应该是2次吧
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