① 丹尼斯·里奇(C语言之父)的英文介绍 要英文!要长的 不能太短!!!!好的补50分!!急用!!!!!
Dennis MacAlistair Ritchie (born September 9, 1941) is an American computer scientist notable for his influence on C and other programming languages, and on operating systems such as Multics and Unix. He received the Turing Award in 1983 and the National Medal of Technology in 1998. Ritchie was the head of Lucent Technologies System Software Research Department when he retired in 2007.
Born in Bronxville, New York, Ritchie graated from Harvard with degrees in physics and applied mathematics. In 1967, he began working at the Bell Labs' Computing Sciences Research Center.
Ritchie is best known as the creator of the C programming language and a key developer of the Unix operating system, and as co-author of the definitive book on C, The C Programming Language, commonly referred to as 'K/R' or K&R (in reference to the authors Kernighan and Ritchie).
Ritchie's invention of C and his role in the development of Unix alongside Ken Thompson, has placed him as an important pioneer of modern computing. The C language is still widely used today in application and operating system development and its influence is seen in most modern programming languages. Unix has also been influential, establishing concepts and principles that are now well-established precepts of computing. The popular Linux operating system and its tools are descendants of Ritchie's work and the Windows operating systems include Unix compatibility tools and C compilers for developers.
Ritchie has said that creating the C language 'looked like a good thing to do' and that anyone else in the same place at the same time would have done the same thing, though Bell Labs colleague Bjarne Stroustrup, developer of C++, said that "if Dennis had decided to spend that decade on esoteric math, Unix would have been stillborn."
Following the success of Unix, Ritchie continued research into operating systems and programming languages with contributions to the Plan 9 and Inferno operating systems and the Limbo programming language.
In 1983, Ritchie and Ken Thompson jointly received the Turing Award for their development of generic operating systems theory and specifically for the implementation of the UNIX operating system. Ritchie's Turing Award lecture was titled, "Reflections on Software Research."
On April 27, 1999, Thompson and Ritchie jointly received the 1998 National Medal of Technology from President Bill Clinton for co-inventing the UNIX operating system and the C programming language which together have led to enormous advances in computer hardware, software, and networking systems and stimulated growth of an entire instry, thereby enhancing American leadership in the Information Age
Dennis Ritchie is often referred to as "dmr" (his Bell Labs email address) in technical discussion groups.
② 学生成绩管理软件
Combat hasn't started, the Houston rockets have out?
At least from now, the report today in the ESPN, according to a well-informed insiders said, Chris bosh, has joined the team next season in the five teams, they are Chicago, Los Angeles lakers, Miami, New York knicks and the Toronto raptors. Namely, if the raptors want a sign-and-trade deal bosh, also can and oxen, the lakers, heat or knicks to discuss, otherwise, bosh is likely to give up a sign-and-trade and become a free agent, then, is the raptors draw water with a sieve.
Actually, this list is bosh explicitly tell us, his real purpose is wanted and lebron James such superstar together, played in the new season belongs to own a sky.
But in fact, the so-called informed the insider also is so, said: "if lebron decided that you sign the knicks will see bosh to New York; if lebron to the bull, it also can be in there. Bosh if lebron choice in Cleveland, the raptors choice.",wholesale NBA jerseys; So then, as a free agent in the summer of several superstar, including dwyane wade -,NHL Jersey, Chris bosh, many people, including all actually in watching lebron James dynamic, there is no hope, and the rockets really?
,Trevor NHL Jersey don't regret leaving Los Angeles;
Maybe James and bosh etc are very good friends, but it may not be able to be very good. From this year's playoffs enough, if we want to go further in the playoffs, inside must possess strong deterrent. The celtics in the insider said although the height is in, but Kevin garnett, rasheed Wallace plus big baby Davis, really is a independently.this strength. At least in the game, and the knights of the celtics paint a lot cheaper.
But not a bosh inside strength player, he's more adept at using his opponent attacks and wide range of al, defensive player to periphery, then use their weight and steps to score. If you want to speak of the attack and defend basket, we have to admit that covered area, the peak of bosh than garnett, still have considerable disparity. Therefore, the pursuit and James bosh blindly partner, isn't wise decision. They both high salary, doomed to any team, once they get two players, will certainly cannot hold any other slightly good points, and the star's star. Unless the two of them, but since Ken came from James there is obviously down is unlikely, but came here, since calderon even bosh agree, raptors can agree?
There are two stars in the playoffs, it is the base to get good grades. But just rely on two superstar, is destined to be less championship. Therefore, this blindly follow bosh James is not wise, absolute, and even some childish.
But, now, raptors since no public bosh selected team, that all this is just black-box stage, the rockets have lots of time to let mind-that bosh. After all, submit the five teams today, tomorrow to fill the list on the team. The key is, now need someone to tell bosh these,cheap authentic jerseys, need someone to shout out, Houston needs Chris bosh, joining, need someone to join after the rockets bosh grand blueprint spread to tell him. This difficult task, can let the rockets general manager daryl morey - to reach lille.
Of course, if we have said before, that yao will be able to use these words in the name of the indivial words aloud, then, the effect will be better.
③ 如何将西门子触摸屏和博途16通讯
西门子触摸屏和PLC通讯大概分为四步。
以S7300PLC为例PLC，设置通讯地址，建立通讯变量。组态触摸屏，建立与PLC的通讯。绑定变量，组态画面。模拟运行，工程下载。
组态PLC，设置通讯地址，建立通讯变量，打开博图软件，创建新项目，并命名为KTP900_S7-300。完成后点击项目视图。西门子PLC硬件组态：插入CPU:CPU315-2PN/DP。打开PLC设备与网络视图，点击315CUP的网口1，为CPU设置IP地址。创建变量表，并在变量表里面创建要通讯的变量。点击PLC项目，编译并下载PLC项目(可以先仿真)，如图配置号PG/PC接口，搜索到建立好的设备，并下载。
组态触摸屏并建立通讯双击添加新设备，插入KTP900，点击确定按钮后，出现HIM组态向导，在PLC连接选项卡下，点击‘浏览’，选择刚才插入的PLC，并选择以太网接口，点击完成后进入触摸屏编程页面。查看连接信息绑定变量，组态画面，模拟运行，工程下载。