c basics

Measurement of emissivity (radiometry)"Real time rendering" in this chapter to say a lot of lighting aspects of the physical terminology, do not know how to translate. Later on Wikipedia see this table, clear a lot (here w is the meaning of watt, the unit is the Joule, the energy, and so on wavelength multiplied Planck constant) http://zh.wikipedia.org/wiki/%E5%BC%B7%E5%BA%A6_ (%e7%89 %A9%E7%90%86):The definition of surface degree is:There are two more visual explanations of emissivity, such as:

Zhang Xiaoxiang Regular expression Video learning notes.1. What is a regular expressionRegular expressions are translated by the English phrase "regular expression", which can be understood as a language that blurs the text.Using some special characters (meta-characters) to express text should have some characteristics.2. Definition of meta-charactersA character with a special meaning in a regular expression that describes the character of the text.For example, "?" Indicates that the preceding c

What is the basis for Weibo's follow-up? How to design a database? For example, I want to make a Weibo post, but follow this fast nbsp; how to operate nbsp; and write it in php .. ------ Solution ------------------ table structure nbsp; estimation like double-stranded tables ------ solution -------------------- what do you know when you follow me on Weibo? How to design a database? For example, I want to create a Weibo post, but I want to know how

use to seamlessly integrate and test platforms with our go-based microservices. Theoretical basis: operational information Some people ask, why do we use go to write microservices? In addition to working with such fun and creative language, the main reason to use go to build microservices is to have a tiny memory footprint. Let's look at the following, we are running the go microservices under Docker swarm and the microservices based on spring bot an

Rate Distortion theorem: The information rate of the source output can be compressed to R (d) in cases where a certain degree of distortion is allowed. 24. Distortion function Distortion function: source symbol x={x1, x2, ... Xn}, channel transmit receive end symbol y={y1, y2 ...yn}, for each pair (XI, YJ) Specify a nonnegative function D (Xi, YJ), called D(XI, YJ) is the distortion or distortion function of a single symbol. In the case of continuous source continuous ch

out.2. Get the key and value correspondence. Get a one-to-one relationship by EntrySet set set by Itrator to get map.entry types of objects.When you get the key or valueIterator: The way the collection is taken out of the element.IteratorListiterator:list's unique iterator list is ordered and indexed, so a unique method is added.Map.entryThe main differences between iterator and Listiterator are:One, Listiterator has the Add () method, you can add objects to the list, and iterator cannot.Both L

()) {i=Q.front (); Q.pop (); if(I==end) Break; for(t=1; t) { if(t!=stardhead[t]==-1AMP;AMP;MAXIMUM[I][T])//there is no access and the edge can be selected{Flow[t]=flow[i]//Select the smallest updatable capacityHead[t]=i;//record the precursor node.Q.push (t); } } } if(head[end]==-1)return-1;//If the end is not visited, there is no augmented path . returnflow[end];}voidf () {intnow,step,max_flow=0, I; while((Step=bfs ())!=-1) {Max_flow+=step;//calculate

() + ":"+ d.getminutes () + ":"+ D.getseconds ();alert (YMDHMS);spanobj.innerhtml = ' (Data saved in: ' +Ymdhms+ ') ';// var text = $ ("span"). Text = ' (Data saved in: ')// + ymdhms + ') ';$ ("#span"). Text (' (Data saved in: ' + ymdhms + ') ');// alert (text);SetTimeout (function () {Spanobj.innertext = ";}, 5000);}}, 25000); Save once every n secondsfunction Stoplocs () {Clearinterval (Savetimer); Stop savingLocalstorage.removeitem ("Ctvalue"); Empty}function Showlocs () {var html = localsto

constant and the B point is farther away from the origin of the axis, then the cosine similarity cosθ is constant, because the angle is constant, and the distance between A and b two is obviously changing, which is the difference between Euclidean distance and cosine similarity.The difference between Euclidean distance and cosine similarity is viewed with three-dimensional coordinate system:According to the calculation and measurement characteristics of Euclidean distance and cosine similarity,

object of any type, that is, a good object is created-(ID) alloc; -Indicates that this method belongs to an object, only the object executes, and the ID represents the object that the initialization completedNote:1. The pointer stores the object's first address, which refers to the object. Working with pointer objects in OC2.Person *p = [person all]; Execute the right side of the equals sign first; The [person all] return value is the object's first address, which is the object.P is a pointer

SVM kernel.The first question we care about is: how do they behave? The following figure shows the performance of the two models (the Green line represents the target function): can see, although it is a model from two different worlds, but they are very close (SVM a bit better), but in the specific problem, it is difficult to know who is better.Note that the number of clusters used in RBF k = = The number of support vectors in SVM.5. RBF and regularizationNote: about how K is selected in clus

exercise.4. Good habits of a wide range of hobbies.5. Good habits of quick action. Chapter 10: Confidence1. Self-confidence is the spiritual pillar of success.2. Confidence can win the trust of others.3. build self-confidence on the basis of creating value.4. How to build confidence-set goals for yourself; give full play to your strengths; do things in a planned, drag-and-drop manner; learn to motivate yourself; and stick to be yourself. Ch

This series of interface-oriented programming is divided into three parts: Interface-oriented programming (1)-ideological basis (released)In this article, I will give a rough introduction to interfaces and interface-oriented programming, focusing on my thoughts. Interface-oriented programming (II)-programming instance (released) This article will combine an instance of "Mobile storage device simulation" to give you an intuitive impression on interfa

time to execute. Start: Opens a new window,/min: Minimized run main window,/C: Original window closed4. Add the Windows scheduled task to automatically complete the synchronization operation at the scheduled time:Run--"taskschd.mscGet. The PC keeps booting after work. The hands were freed from this.Enter Help:Winscp> HelpCall executes any remote shell commandCD changes Remote working directorychmod changing remote file permissionsClose closing SessionsExit close all sessions and end the program

static function who () { echo __class__, ''; } public static function test () { static::who (); }}; Class J extends i{public static function who () { echo __class__, ''; }}; Operation Result: J With these two examples, you can take a good look at static delay bindings for statics. Write a bit more, mainly because of a involved inheritance will not stop .... Object-oriented There are some just points, there is time to fill it up later ... Thank you, if

Why can't I execute php scripts on a regular basis ???? I checked a lot of posts on the Internet and tried various methods... Help! Execute the test. php file once every minute and set the executable permissions. Then edit the cronb file as follows */1 *** root/usr/local/php5/bin/php/usr/local/apache/htdoc. Why does my regular php script execution fail? what about execution ???? I checked a lot of posts on the Internet and tried various methods... He

number calculation, gave the analytic, the single digit and 10 people to look carefully to understand. Leave a question. Think: However, if you want to randomly calculate a value. Separate the number of each of their digits. How does it work? 4, Beg 1*2*3*..........*n. Cycle5, 1+2+3+4+6+7+8+9+11++.+99= (not add 5 multiples)6, to satisfy the 1+2+3+...+nThis article by doing full stack Siege Lion original debut, if reproduced please declare the source. WX platform: Make ful

literal difference, that is, the decision condition in the outer for loop is IThe essence of the selection sort is to start with the first bit, all the remaining elements after the traversal, to find the smallest one in the first place, and then start with the second, find the second-smallest number in the array, and so on.There are two important features in selecting a sort: Run time and input Independent That is, regardless of the order of the initial state of the array, the num

Finds all sibling elements before the current element, which can be filtered with an expression:Instance:[jquery filter Prevall ([expr])] This method is used to search for all sibling elements before finding the current element on the basis of the selector

"polymorphic" has the following outstanding advantages:(1) The application does not have to write function calls for each derived class, only the abstract base class is processed. This oneCall "Status quo", can greatly improve the reusability of the program (this is the interface design reuse, rather than code implementation of reuse).(2) The function of the derived class can be referenced by the base class pointer, which is called backward compatibility, which can improve the extensibility and