El autor del libro Claudio Hernadez nos indica que ya está trabajando en la tercera parte del libro.

El libro se puede bajar de esta dirección (ojo que son como 200 Kb en formato pdf)

Actualizado: Ahora que he tenido un poco de tiempo para leerme el librillo quiero avisar que tiene el rigor cientifico un pelin desviado :) Si queremos leer un par de historietas o usarlo de introducción para conocer un poco el lenguaje esta bien, no vale para mucho más

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"7 · 23 " before Louis Vitton Black Check Pattern motor-car Louis Vitton Coffee Check Patter accident happens a few hours, he Huawu of academician Louis Vitton Colorized Monogram of railway Louis Vitton Leather Texture ministry Louis Vitton Monogram chief engineer, Louis Vitton Patent Leather Chinese Academy of Engineering attends in Chengdu " conference L ouis Vitton Ramie Cotton of learning Louis Vitton Stripe of international Louis Vitton Wallets of carriage Louis Vitton White Check Pattern project of louis vuitton outlet the 3rd traffic " Louis Vitton White Check Pattern when still express, "The safe safeguard of Chinese tall iron is reliable " , " what the quality of Chinese rail uses than Japan and European place is more outstanding " .

Since already overtook the tall iron elder such as Japan, Europe, should be China expended on tall iron research and development immeasurable?

" daily economy news " the reporter considers to discover, circumstance rather -- the car austral the China that produces railroad engine (601766, SH) , Chinese north car (601299, SH) , charge of its research and development is occupied mediumly in business income than index, be inferior to river bell car unexpectedly (000550, SZ) wait for company of conventional equipment manufacturing industry; The central nervous of tall iron of responsible research and development -- 5 enterprises of equipment of electrification, informatization, this one index returns be not a patch on even cosmetic of a production is plastic the enterprise of bottle.

Those who build Gao Tie than building a car nevertheless

As our country " 925 " of high-end equipment manufacturing industry two big " surveyor's pole " enterprise, how many does the investment of the car austral China, Chinese north car on research and development have after all?

WIND information count shows, 2006~2010 year, year of business income of the car austral China it is 23.5 billion yuan respectively, 27.4 billion yuan, 35.8 billion yuan, mix 64.9 billion yuan 46.4 billion yuan, charge of research and development is 320 million yuan respectively, 490 million yuan, 940 million yuan, 1.31 billion yuan mix 2.44 billion yuan. Apparently, the company is on research and development already year after year increases investment, but pass after comparing, can discover, this charge in battalion the place in closing occupies specific gravity to be only 1.36% , 1.78% , 2.61% , 2.82% with 3.76% , all be worth 5 years for 2.466% .

Be in these 5 years together, the business income of Chinese north car is 21 billion yuan respectively, 26.4 billion yuan, 34.7 billion yuan, 40.5 billion yuan mix 62.2 billion yuan, charge of research and development is 250 million yuan respectively, 430 million yuan, 660 million yuan, 490 million yuan mix 1.79 billion yuan. The proportion that charge of research and development holds battalion to close is respectively 1.21% , 1.64% , 1.90% , 1.21% with 2.89% , all be worth 5 years for 1.77 ％ . Among them, charge of research and development appeared 2009 even negative growth, decrease compared to the same period 25.34% , but current run closes to be in however grow considerably.

The data shows, already crossed exorbitant iron research and development this one " burn money " the Xi Menzi of level, its 2009, charge of research and development occupied his to do business 2010 the scale of income exceeds 5.1% , mix for 3.9 billion euro respectively 3.846 billion euro; Apparent, car, north car is south on investment of research and development Yuan Xun at Xi Menzi.

While than passing abroad travels together, " daily economy news " the reporter returns discovery, exceed the 300 kilometers, whole world tip that takes on 1000 people at the same time as speed per hour of research and development motorcycle manufacturer, the devoted strength on research and development returns Chinese north vehicle unexpectedly be not a patch on produces speed per hour more than 100 kilometers, only the Jiang Ling car that a few people take a car.

Forms for reporting statistics shows, battalion of nearly 5 years receives river bell car to be 7.7 billion yuan respectively, 8.5 billion yuan, 8.6 billion yuan, 10.4 billion yuan mix 15.8 billion yuan, but charge of its research and development achieves 110 million yuan respectively, 150 million yuan, 180 million yuan, 200 million yuan mix 550 million yuan, the proportion that charge of research and development holds battalion to close is 1.44% , 1.78% , 2.08% , 1.91% with 3.51% , all be worth 5 years for 2.144 ％ , exceed the 1.77 ％ of Chinese north car apparently.

The enterprise even with truckload production is such, the company that supplies equipment of form a complete set for Gao Tie is not exceptional also, similar occurrence research and development throws the phenomenon that does not match with top technology.

Be versed in in order to produce the Taiyuan of axis of high speed wheel again (600169, SH) for exemple, 2008~2010 year, this company fact is battalion to receive 7 billion yuan, 8.1 billion yuan mix 9.7 billion yuan, the investment on research and development is 15.71 million yuan, 6.97 million yuan mix 22.82 million yuan; The proportion that charge of research and development holds battalion to close is only 0.22% , 0.09% with 0.24% , all be worth 3 years for 0.18 ％ .

Advance 100 million industrial (601002, SH) , Jin Xi axle (600495, SH) , rich deep tool (002282, SH) wait for company of Gao Tie fittings to also appear similar case.

Gao Tie is neurological be how of research and development

Tall iron equipment makes the research and development of the enterprise throw have too many problems to deal with, so be by the analogy inside course of study " Gao Tie is neurological " , equipment of the tall iron electrification that representing tall, essence, pointed technology, informatization, what kind of circumstance is its manufacturer on ongoing hair investment?

" daily economy news " the reporter is right vessel Chinese technology (300011, SZ) , brilliant science and technology (002296, SZ) , special acute heart (300001, SZ) , century luck Er (300150, SZ) , beautiful dispatch letter (300213, SZ) the data of 5 companies had statistic.

Brilliant science and technology is system of security of the system of tall iron signal that monitor, take precautions against natural calamities advocate contractor, this company 2008~2010 year the proportion that holds year of battalion to close in the investment on research and development is respectively 6.45% , 6.35% with 5.08% .

Responsible railroad of century luck Er is integrated the research and development of the system such as monitoring of video monitoring, safety of take precautions against natural calamities, communication monitoring works, the proportion that nearly 3 years charge of research and development takes business income is 5.85% , 5.76% with 4.92% .

Special of acute heart advocate business Wu reachs form a complete set to equipment is produced and be sold for transformer substation of railroad box type, the scale that nearly 3 years charge of research and development takes business income is 4.06% , 3.71% with 3.43% .

Responsible and groovy railroad attempers, the beautiful dispatch letter that product of monitoring of safety of take precautions against natural calamities of lash-up direct, railroad develops, 2007~2009 year this one index is respectively 9.34% , 8.30% with 8.09% .

Of vessel Chinese technology advocate hit a product to be system of power source of orbit traffic intelligence, the scale that nearly 3 years charge of research and development takes business income is 2.89% , 3.59% with 5.76% .

Charge of 5 companies research and development occupies battalion to receive the arithmetical average of specific gravity to be 5.5 ％ , look to be close friends than the car austral China, Chinese north car really, but, what need makes clear is, with south, boreal car such " gigantic without bully " industry posture is compared, these a few companies are small business, among them company of the 1 platelet in the home, 4 do poineering work board company, do poineering work lesserly in business income scale period, research and development is occupied devotedly bigger than behoove.

Reporter discovery, advocate the Chuandazhi that battalion sky provides automation system is gotten the better of (002253, SZ) , its product is our country civil aviaton advocate with systematic supplier, those who be equivalent to civil aviaton " central nervous system " , 5 when investment of its research and development exceeds Gao Tie to fasten apparently appear on the market company. Statistic shows, the charge of research and development that 3 years Chuandazhi gets the better of recently holds business income proportion, mix for 13.11 ％ , 25.85 ％ respectively 17.08 ％ , surpass the company of tall iron form a complete set such as brilliant science and technology far.

In addition, the reporter leafed through enterprise of the platelet in a deep city at will -- produce Li Xing (002243, SZ) , its advocate business Wu is production and sale cosmetic the plastic product that pack, it is Bao Jie, combination technically benefit China, Oulaiya world-famous make up business offers the grandma that wash a face, shampoo, cosmetic to wait pack with plastic bottle. It is a such companies however, its 2006~2010 year realize year of business income 370 million yuan, 480 million yuan, 570 million yuan, mix 710 million yuan 590 million yuan, the investment on research and development achieves 16.44 million yuan, 16.63 million yuan, 32.23 million yuan, 39.13 million yuan mix 46.38 million yuan, the proportion that charge of research and development takes business income is respectively 4.43% , 3.51% , 5.62% , 6.68% with 6.50% , its average is 5.35 ％ , also the company of tall iron form a complete set before prep above.

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Un poco de historia informática.

Java aparece como lenguaje en 1991, en principio estaba pensado como un lenguaje de programación sencillo y universal y orientado a electrodomésticos
A finales de 1995, repito, en 1995 se reconvierte el lenguaje para poder ser utilizado en el mundo de los ordenadores y más concretamente en Internet. Aparece la primera JVM en el navegador Netscape 2.0 y a partir de ese momento se produce su explosión.

Ahora un poco de matématicas

En fin, como dicen en mi tierra "Antes se pilla a un mentiroso que a un cojo"

Antes de los 22 años ya tenías la carrera y te dió tiempo a trabajar en SGI? Que prematuro hombre...

Claes de inglés para traducir un libro? Que fuerza de voluntad.

Libro de java en el 88? Adelantado al tiempo.

Eres un genio hombre!!! Un verdadero hacker.

Trabajabas en SGI? Yo conozco a casi todos, había gente muy buena pero no había nadie tan prematuro.

Donde estás ahora, ¿en Airtel? XDDDDD

EL PROBLEMA DE LAS OCHO REINAS:

Este problema es un conicido ejemplo del uso de los metodos de tanteo y de los algoritmos de rastreo inverso. Lo investigo C. F .Gauss en 1850, pero sin resolberlo por completo. Ello no debe causar sorpresa. Despues de todo, la propiedad especial de estos problemas es que desafian la solucion analitica. Por el contrario requieren grandes cantidades de trabajo exhaustivo, paciencia y exactitud. De ahi que esos algoritmos hayan adquirido importancia casi exclusivamente gracias a la computadora automatica, la cual posee esas propiedades en un grado mucho más alto que las personas en general e incluso que los genios.

El problema de las ocho reinas se formula en los siguientes terminos: hay que colocar ocho reinas en un tablero de ajedrez en una forma tal que ninguna reina se como a otr. En el tablero solo deben haber las ocho reinas, se deben de usar las reglas conocidas del mismo juego, y pues por el mometo es todo.

Mira lovius_trade esta es una solucion creo que te exediste un poco al decir que hay mas de 50, si las hay pero como has de saber eso es solo un truco, por que con cada solucion que salga con voltear el tablero mentalmente sacas 4 mas, pero, yo solo cansegui sacar 12 soluciones significativas

Codigo:

MODULE AllQueens;

FROM InOutIMPORT WriteINT, WriteLn;

VAR i: INTEGER;

a: ARRAY [1 .. 8] OF BOOLEAN;

b: ARRAY [2 .. 16] OF BOOLEAN;

c: ARRAY [-7 .. 7] OF BOOLEAN;

x: ARRAY [1 .. 8] OF INTEGER;

PRODUCERE print;

VAR k:INTEGER;

BEGIN

FOR k:= 1 to 8 DO WRITEInt(x[k], 4) END;

WriteLn

END print;

PRODUCERE Try (i: INTEGER);

VAR j:INTEGER;

BEGIN

FOR j:= 1 TO 8 DO

IF a[j & b[i+j]& c[i-j]THEN

x[i] := j;

a[j]:= FALSE; b[i+j]:= FALSE; c[i-j]:= FALSE;

IF i "mayor que" 8 THEN Try(i+j) ELSE print END;

a[j]:= TRUE; b[i+j]:= TRUE; c[i-j]:= FALSE;

END

END

END Try;

BEGIN

FOR i:= 1 TO 8 DO a[i]:= TRUE END;

FOR i:= 2 TO 16 DO b[i]:= TRUE END;

FOR i:= -7 TO 7 DO c[i]:= TRUE END;

Try(1)

END AllQueens

aqui les dejo las 12 solucionesen realidad serian tanves "12 * 4"

x1 x2 x3 x4 x5 x6 x7 x8 n

1 5 8 6 3 7 2 4 876

1 6 8 3 7 4 2 5 264

1 7 4 6 8 2 5 3 200

1 7 5 8 2 4 6 3 136

2 4 6 8 3 1 7 5 504

2 5 7 1 3 8 6 4 400

2 5 7 4 1 8 6 3 72

2 6 1 7 4 8 3 5 280

2 6 8 3 1 4 7 5 240

2 7 3 6 8 5 1 4 264

2 7 5 8 1 4 6 3 160

2 8 6 1 3 5 7 4 336

Bueno Loviu_trade yo me buscare uno muy bueno de lgica China o India, que espero que te pare los pelo, jejeje, tambien tengo unos de numero infinitos en los cuales tienes que usar todos tus conocimientos es algebra y calculo diferencial e integral, jejeje ya no estaremos biendo.

HOARE http://research.microsoft.com/~thoare/

escrito en PASCAL

Esto estuvo de pelos me agrado mucho, ademas si tienes razon solo son 12 las mas significativas. Luego te pondre un problema de liberacion de memoria virtual en ensamblador que a mi me csto serca de 3 meses en resolvermelo, claro en ENSSAMBLER-ASM. pero ya veremos de a como nos toca no!!! printf("solo bromeo, jajaja, me agrada toparme xcon gente como tu--- ") NOs vemos luego

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