Uniform | 易学教程

Oracle：本地管理表空的由来

阅读更多关于 Oracle：本地管理表空的由来

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 在Oracle8I的版本中，Oracle推出了一种全新的表空间管理方式：本地化管理的表空间。所谓本地化管理，就是指Oracle不再利用数据字典表来记录Oracle表空间里面的区的使用状况，而是在每个表空间的数据文件的头部加入了一个位图区，在其中记录每个区的使用状况。每当一个区被使用，或者被释放以供重新使用时，Oracle都会更新数据文件头部的这个记录，反映这个变化。本地化管理的表空间的创建过程：语法：CREATE TABLESPACE 表空间名字 DATAFILE '数据文件详细信息' [EXTENT MANAGEMENT { LOCAL {AUTOALLOCATE | UNIFORM [SIZE INTETER [K|M] ] } } ] 关键字EXTENT MANAGEMENT LOCAL 指定这是一个本地化管理的表空间。对于系统表空间，只能在创建数据库的时候指定EXTENT MANGEMENT LOCAL，因为它是数据库创建时建立的第一个表空间。在8i中，字典管理还是默认的管理方式，当选择了LOCAL关键字，即表明这是一个本地管理的表空间。当然还可以继续选择更细的管理方式：是 AUTOALLOCATE 还是 UNIFORM.。若为AUTOALLOCATE，则表明让Oracle来决定区块的使用办法

OpenGL Uniform Buffer std140 layout, a driver bug or did I misunderstand the specification?

阅读更多关于 OpenGL Uniform Buffer std140 layout, a driver bug or did I misunderstand the specification?

问题 The OpenGL specification lies (or is this a bug?)... Referring to the layout for std140, with shared uniform buffers, it states: "The set of rules shown in Tabl e L-1 are used by the GLSL compiler to layout members in a std140-qualified uniform block. The offsets of members in the block are accumulated based on the sizes of the previous members in the block (those declared before the variable in question), and the starting offset. The starting offset of the first member is always zero. Scalar

singmod 与relu损失函数的比较

阅读更多关于 singmod 与relu损失函数的比较

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> import matplotlib.pyplot as plt import numpy as np import tensorflow as tf sess = tf.Session() tf.set_random_seed(5) np.random.seed(42) batch_size = 50 a1 = tf.Variable(tf.random_normal(shape=[1,1])) b1 = tf.Variable(tf.random_uniform(shape=[1,1])) a2 = tf.Variable(tf.random_normal(shape=[1,1])) b2 = tf.Variable(tf.random_uniform(shape=[1,1])) x = np.random.normal(2,0.1,500) x_data = tf.placeholder(shape=[None,1],dtype=tf.float32) sigmoid_activation = tf.sigmoid(tf.add(tf.matmul(x_data,a1),b1)) relu_activation = tf.nn.relu(tf.add(tf.matmul(x_data,a2),b2))

random unit vector in multi-dimensional space

阅读更多关于 random unit vector in multi-dimensional space

问题 I'm working on a data mining algorithm where i want to pick a random direction from a particular point in the feature space. If I pick a random number for each of the n dimensions from [-1,1] and then normalize the vector to a length of 1 will I get an even distribution across all possible directions? I'm speaking only theoretically here since computer generated random numbers are not actually random. 回答1: One simple trick is to select each dimension from a gaussian distribution, then

用 shader effect 实现雨滴落水效果！Cocos Creator 3D !

阅读更多关于用 shader effect 实现雨滴落水效果！Cocos Creator 3D !

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> > 最近逛论坛时，看到一位大佬在分享各种 shader 特效。基于其中的水波 shader ，白玉无冰写了一个玩水效果！文章底部获取完整代码！还可以试试水哦！先一起看看效果～点击任意位置，会在该位置生成一个水纹，就像是雨水落在水洼中一样～如何使用 effect 文件？新建一个 material ，Effect 属性选择 water , 接着将纹理图片拖到相应参数。最后为你的模型节点选择材料。水纹片元着色器实现原理：通过计算与点击点的距离和方向，用 sin 函数模拟水纹效果。通过计算点击时间戳和当前时间与距离，判断是否添加水纹效果。再将多个点击点叠加起来，得到 texture 最终 uv 。主要代码如下。 for(int i = 0; i < 10; i++){ vec2 uvDir = normalize(v_uv - center[i].xy); float dis = distance(v_uv, center[i].xy); float dis_time = center[i].z - cc_time.x + dis * 3.0; if ( center[i].z > 0.0 && dis_time < 0.0 && dis_time > -0.1 ){ uv += sin_A * uvDir

out of range random number generation in C++ using tr1

阅读更多关于 out of range random number generation in C++ using tr1

问题 I am trying to generate number from a uniform distribution of real number in the range of [0, 1). But compiler is generating numbers which are out of [0, 1) range. Here is the code: int main(void) { // Solver solve; mt19937 mteng; mteng.seed(rdtsc()); uniform_real<double> uniRealD; double randomNum; for (int index = 0; index < 10; index++){ randomNum = uniRealD(mteng); if(randomNum<0.5) cout<<index<<" no. random number is: "<<randomNum<<endl; else cout<<"number generate is not in range"<<endl

sloped uniform distribution python

阅读更多关于 sloped uniform distribution python

问题 I would like to acquire values from a uniform distribution that is sloped instead of a standard uniform distribution which is drawing out values from a straight flat line of slope = 0. To be more specific, I'd like to get values from the function of the slope distribution, FIGURE 2 BELOW. I do know that for the first one, I could use numpy.random.uniform(initial,final). How can I do this for a sloped distribution? I know that multiplying a 'slope' or scaling factor to the values from the

How to generate a random integer in the range [0,n] from a stream of random bits without wasting bits?

阅读更多关于 How to generate a random integer in the range [0,n] from a stream of random bits without wasting bits?

问题 I have a stream of (uniform) random bits from which I'd like to generate random integers uniformly in the range [0,n] without wasting bits. (I'm considering bits wasted which are in excess of floor(log_2(n))+1, on the assumption that it's always possible to use no more than that.) E.g., if n = 5, then the algorithm I'm looking for should use no more than three bits. How can this be done? 回答1: This is equivalent to find a two-way function between two set of different (finite) cardinality. It

jQuery Uniform Checkbox does not (un)check

阅读更多关于 jQuery Uniform Checkbox does not (un)check

问题 I am using jQuery Uniform to style inputs/selects etcs. However, the checkbox has stopped working. I am appending data sent from an ajax call. Once it's loaded, I use $.uniform.update("input:checkbox") to update the new html. When attempting to (un)check the input it works only once. If I want to (un)check it again, it doesn't change at all. I've attempted changing the Uniform Javascript so that all the actions (ie. click , focus , blur etc) are under the .live function. (ie. .live("click", )

HTTP协议，到底是什么鬼？

阅读更多关于 HTTP协议，到底是什么鬼？

【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 作者 | Jeskson 来源 | 达达前端小酒馆了解HTTP HTTP是什么呢？它是超文本传输协议，HTTP是缩写，它的全英文名是HyperText Transfer Protocol。那么什么是超文本呢？超文本指的是HTML，css，JavaScript和图片等，HTTP的出现是为了接收和发布HTML页面的，经过不断的发展也可以用于接收一些音频，视频，文件等内容。 HTTP协议是用于客户端和服务器端之间的通信的，用于客户端和服务器端之间的通信有HTTP协议和TCP/IP协议族内的其他众多的协议相同。请求访问文本或图片等资源的一方，我们叫做客户端，接收端，提供响应的一端称为服务器端。 Client客户端请求Server服务端，Server服务端响应给Client客户端。HTTP是基于客户端/服务端的架构模型，浏览器或其他任何客户端都可以用HTTP协议的，通过URL地址向HTTP的服务器即Web服务器发送所有请求，Web服务器端在接收到请求后会做出反应，响应给对方，就是向客户端回传响应的信息。《图解HTTP》注意：在使用HTTP协议的时候，我们一端必定是客户端，另一端必定是服务器端。有时候服务端和客户端是可以互换的，如果要决定谁是服务器端和谁是客户端，单就一条通信路线来讲，是可以确定的

订阅 Uniform