差价合约的常见问题解析
scylladb 是兼容cassandra 的数据存储系统，从官方的性能报告，比原生的apache cassandra 有好多 的提高使用docker 运行，具体的也可以参考官方文档，后边会提供docker-compose 运行的脚本步骤seed 节点docker run --name scylla -d scylladb/scylla.
相机标定相关概念_星痕无奈的博客-程序员ITS401_相机标定的概念
相机标定一、概念为确定空间物体表面某点的三维几何位置与其在图像中对应点的相互关系，建立的相机成像几何模型，其中的参数就为相机参数，求解的过程就叫相机标定。二、参数类别外参矩阵：世界坐标系 到 相机坐标系内参矩阵：相机坐标系 到 图像坐标系 到 像素坐标系畸变矩阵：制作原因产生的变形结构参数：右相机相对左相机的变换三、标定方法方法优点缺点具体方法传统相机标定法可适用任意相机模型，精度高需标定物，算法复杂Tsai两步法、张氏标定法主动视觉相机标定法不需标定
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分散/聚集 I/O(scatter-gather I/O)_Mirants的博客-程序员ITS401
概述分散/聚集 I/O是一种可以在单次系统调用中对多个缓冲区输入输出的方法，可以把多个缓冲区的数据写到单个数据流，也可以把单个数据流读到多个缓冲区中。其命名的原因在于数据会被分散到指定缓冲区向量，或者从指定缓冲区向量中聚集数据。这种输入输出方法也称为向量 I/O（vector I/O）。与之不同，标准读写系统调用（read，write）可以称为线性I/O（linear I/O）。与线性 I
房贷族的经济账：交行提前还房贷收取1%补偿金，闲钱该理财还是提前还贷？
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四大催化劑 凱基投顧看好迎來反彈行情
而台灣股民對未來半年投資股票的信心指數已降至歷史低位，回顧往年數據，當此信心指數降至50以下，3個月後台股的累計投報率平均可達6%，6個月後則達13%。凱基投顧建議投資人，可趁利空打壓股市時向下布局，看好族群為蘋概、雲端/資料中心、汽車電子、綠能等需求具有相對韌性的次產業。
差价合约的常见问题解析
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For what I remember, I was always more afraid 差价合约的常见问题解析 than anyone else. What happened? Almost nothing - I just had the bout. Are there any spasms of something wrong? Maybe he's afraid he's contagious. And then why are you talking about the devil? Why a prison? I had a piece of bread. It was fresh and fragrant. Yesterday I made him his own hand. I have to say that I really did this time. Suddenly 差价合约的常见问题解析 my bite began to bang in my throat. Somewhere near the window, he sat down and began to sneak around his changing trills around. He whispers and leaves for a moment where he likes. Everywhere he finds something in his beak . I've been trying to be in his place .