https://blogs.msdn.microsoft.com/tomholl/2009/05/21/protecting-against-xml-entity-expansion-attacks/ Protecting against XML Entity Expansion attacks Tom Hollander May 21, 2009 One of the critical responsibilities of every developer and architect is t…

in-list expansion也被称作or expansion --针对in后面是常量集合的另外一种处理方法.优化器会把目标sql中in后面的常量集合拆开,把里面的每个常量都提出来形成一个分支,各分支之间用union all来连接.即in-list expansion本质是把带in的目标sql等价写成union all连接的各个分支. in-list expansion改写成union all连接分支后,各个分支可以各自走索引.分区裁剪.表连接等相关的执行计划而不互相干扰:缺点是,改写后,随…

BigDecimal除法运算出现java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result的解决办法 今天在使用两个BigDecimal类型的数字做除法运算时,出现了一个如下的异常信息: 1 java.lang.ArithmeticException: Non-terminating decimal expansion; no exact repre…

Square root digital expansion It is well known that if the square root of a natural number is not an integer, then it is irrational. The decimal expansion of such square roots is infinite without any repeating pattern at all. The square root of two i…

Jacobi symbol Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 625    Accepted Submission(s): 258 Problem Description Consider a prime number p and an integer a !≡ 0 (mod p). Then a is called a q…

题链:http://poj.org/problem? id=3168 Barn Expansion Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2087   Accepted: 544 Description Farmer John has N (1 <= N <= 25,000) rectangular barns on his farm, all with sides parallel to the X and…

Period of an Infinite Binary Expansion 题目大意:给你一个分数,求这个分数二进制表示下从第几位开始循环,并求出最小循环节长度. 注释:int范围内. 想法:这题说实话,是一道神题!我们思考一下,如何将一个小数换成二进制?连续的乘2,然后取首位.这样的比较简洁的转换方式注定了这题其实是可做的.我们可以抓住循环节的在这样的方法下是怎样形成的?显然,存在一个x,使得每多乘$2^x$都会使得所形成的答案相同.第二点,我们知道,一个分数的循环节开始之前是不参与循环的.…

camera/CameraImpl.h::: error: expansion pattern ‘Frame&’ contains no argument packs void read_frame(Frame& varg, Frame& ... args); 在尝试变长参数的时候出现如上错误.当时使用指针是没问题的,换成引用报错了. camera/CameraImpl.h:79:42: error: expansion pattern ‘Frame&’ contains…

Problem UVA12627-Erratic Expansion Accept: 465  Submit: 2487Time Limit: 3000 mSec Problem Description Input The first line of input is an integer T (T < 1000) that indicates the number of test cases. Each case contains 3 integers K, A and B. The meani…

论文: Multi-Fidelity Automatic Hyper-Parameter Tuning via Transfer Series Expansion 我们都知道实现AutoML的基本思路是不断选取不同的超参数组成一个网络结构,然后使用这个网络结构在整个数据集上进行评估 (假设评估值为\(f_H(X)=\mathcal{L}(δ,D^{train},D^{valid})\),X表示某一组超参数) ,最后选择出评估性能最好的网络参数. 但是基于full dataset进行评估cost太…