a1, a2, a3, b1, b2, b3, c1, c2, c3;A1 = cos (r) * cos (t)-sin (r) * sin (s) * sin (t );A2 =-cos (r) * sin (t)-sin (r) * sin (s) * cos (t );A3 =-sin (r) * cos (s );B1 = cos (s) * sin (t );B2 =
the following business operations:Table 1. Business operations
Domain-specific language (domain specific Language)
The so-called domain-specific language (domain specific LANGUAGE/DSL), its basic idea is "to ask for a special purpose", unlike the general-purpose language as the target scope covers all software problems, but specifically for a specific problem computer language. As its name claims, the language is not generic, but focused on a par
the same time, so that J in the denominator can be eliminated.The plural also conforms to the exchange law, combination law, and allocation Law in the algebraic operation:A B = B(A + B) + C = a + (B + C)A (B + C) = AB + AC 2. Polar representation of the plural number As mentioned above, Cartesian coordinates are used to represent the plural. In fact, polar coordinates are more commonly used, for example:
M in is the magnproduct, which indicates the distance from the origin point to the coordi
A few days ago, I published an article about how to generate a curve. For more information, see
Mathematical graphics (1.11) Rose Line
Mathematical graphics (1.27) flowers
In this section, the two-dimensional curve is converted into a three-dimensional curve, which looks much more beautiful.
For related software, see: Mathematical graphics visualization tool. Use script code with custom syntax to generate mathematical graphics.
(1) rose Wire
vertices = D1:4000 D2:6n = 8u = from 0 to (n*PI) D1v
Policy-based multi-path Wan
The construction of a multi-path Wan can reduce business continuity risks, while avoiding the high cost of building a dedicated-Line Wan and a dedicated-Line Wan. Therefore, enterprises can make full use of cheap and abundant DSL Internet links while effectively utilizing existing WAN resources.
The enterprise's reliance on Wan is reaching a record level. Remote access to key business applications grows steadily as enterpri
very clear and clear in some problem areas may become less clear when implemented. As programmers, using clean code to achieve functionality is only a primary requirement, more importantly, to improve the level of common language, to build a specific problem domain language (DSL), the process is a key point is to find and define the problem domain-oriented atomic concepts, Combination of methods and abstract means . The
. Service) *Operandscontroller {returnoperandscontroller{controller:service. Newcontroller ("Operandscontroller")}}//Add runs the Add action.Func (c *operandscontroller) Add (CTX *app. Addoperandscontext) Error {//Tbd:implement write the corresponding function logic here returnNil}Very good, no need to repeat the framework of the Low-level code (routing, codec, etc.).Although the former company's framework was used before (that is, the use of Java's reflection to generate code automatically),
; Center point float e[2]; Half-length, half-width}; Float Minarearec (point *pts, int ptsnum, OBB obb) {float Minarea = Flt_max; for (int i = 0, j = ptsNum-1; i Rotating caliper (rotating jam) algorithmUsing the rotary caliper algorithm can reduce the time consumption of calculating the minimum bounding rectangle of a convex polygon.Take the coordinates of the two points to form a parallel line, rotating two lines, when the line and polygon one edge coincident, the calculation of the
/*** Obtains the operating system information of the client. Currently, only Windows 7, WINXP, win2003, Win2000, Mac, WINNT, Linux, mac68k, and Win9x are matched.* @ Param useragent request. getheader ("User-Agent") Return Value* @ Return*/
Public static string getclientos (string useragent){String cos = "unknow OS ";Pattern P = pattern. Compile (". * (Windows NT 6 \. 1 ).*");Matcher M = P. matcher (useragent );If (M. Find ()){
PrefaceIn daily development work, we always need to write some syntax analyzers from time to time. The syntax analyzer does not necessarily refer to the front-end of a language compiler, but may also be a read/write program for configuration files designed by itself, or a DSL (domain-specific language) that simplifies our development ). We can choose to use XML, but because XML is too noisy, it is necessary to write a syntax analyzer by yourself, espe
A DSL is a specialized language that addresses domain-specific issues. By getting closer to the problem, the DSL can provide benefits that may not be found in the common language. The Java world is full of DSLs. Property files, Spring contexts, a usage of annotations, and Ant tasks are examples of DSLs.
When I started to look at other languages like Ruby, I began to understand that the Java language is not
Document directory
Using Non JVM languages ages with storm
Dsls and multilang adapters
Using Non JVM languages ages with storm
Https://github.com/nathanmarz/storm/wiki/Using-non-JVM-languages-with-Storm
Multilang Protocol
Https://github.com/nathanmarz/storm/wiki/Multilang-protocol
Using Non JVM languages ages with storm
The JVM language is relatively simple. You can directly improve DSL encapsulation of Java.Non-JVM languages are a little more c
strange, this time is always disconnected, about 2.5 minutes, if the ping will be re-dial, but so Firefox also need to stop the escape and then re-refresh, depressed ...OKsudo gedit/etc/ppp/peers/dsl-providerAdjust the insideLcp-echo-interval 200Lcp-echo-failure 40MTU 1000Holdoff 0set the echo interval larger; more failures; MTU 1000 or smaller; some say Holdoff 0 .The argument.Found an article that said a way to modify the options filesudo gedit/etc
When using a DSL connection, if you are using a DSL connection that has a fixed or static IP address, the configuration step is the same as described in the previous network configuration. You connect the Ethernet interface to the DSL modem and configure the IP address, subnet mask, broadcast address, and gateway information provided by the ISP. You should be con
)));}While (math. Abs (front-Temp) B = math. atan (temp); // obtain the latitude.If (B {B + = math. Pi;}Double W = math. SQRT (1-e1 * E1 * Math. Sin (B) * Math. Sin (B ));Double N = A/W;// N = (A * m-C * C)/(2 * B * z );System. Out. println ("n =" + n );H = m/Math. Cos (B)-N; // height// H = z/Math. Sin (B)-N * (1.0-E1 * E1 );// H = x/(math. Cos (B) * Math. Cos
quantity product (magnitude), which represents the distance from the origin to the coordinate point, θ is the phase angle (phase angle), which represents the angle from the positive direction of the x-axis to a vector, and the following four formulas are the calculation methods:We can also convert polar to rectangular coordinates using the following equation:A + JB = M (cosθ+ j sinθθ)
In this equation, the left side is a Cartesian expression, and the right is a polar coordinate expression.There
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.