英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：

ptolemy    音标拼音: [t'ɑləmi]
n. 人名

人名

Ptolemy
n 1: Alexandrian astronomer (of the 2nd century) who proposed a
geocentric system of astronomy that was undisputed until
the late Renaissance [synonym: {Ptolemy}, {Claudius
Ptolemaeus}]
2: an ancient dynasty of Macedonian kings who ruled Egypt from
323 BC to 30 BC; founded by Ptolemy I and ended with
Cleopatra [synonym: {Ptolemy}, {Ptolemaic dynasty}]

A flexible foundation for the specification, simulation, and
rapid prototyping of systems. It is an {object-oriented}
framework within which diverse models of computation can
co-exist and interact. For example, using Ptolemy a
{data-flow} system can be easily connected to a hardware
simulator which in turn may be connected to a discrete-event
system. Because of this, Ptolemy can be used to model entire
systems. In addition, Ptolemy now has code generation
capabilities. From a {flow graph} description, Ptolemy can
generate both {C} code and {DSP} {assembly code} for rapid
prototyping. Note that code generation is not yet complete,
and is included in the current release for demonstration
purposes only.

Version 0.4.1 includes a graphical algorithm layout, code
generator and simulator. It requires {C}, {C} and has been
ported to {Sun-4}, {MIPS}/{Ultrix}; {DSP56001}, {DSP96002}.
Ptolemy is an active research project.

{(ftp://ptolemy.bekeley.edu/pub/ptolemy/)}. Mailing list:
ptolemy-hackers-request@ohm.berkeley.edu. E-mail:
.

(1993-04-22)


请选择你想看的字典辞典：
单词字典翻译
ptolemy查看　ptolemy　在百度字典中的解释百度英翻中〔查看〕
ptolemy查看　ptolemy　在Google字典中的解释Google英翻中〔查看〕
ptolemy查看　ptolemy　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Ptolemy I Soter - Wikipedia
    Ptolemy I Soter ( ˈtɒləmi ; Greek: Πτολεμαῖος Σωτήρ, Ptolemaîos Sōtḗr, "Ptolemy the Savior "; c 369 68 BC – January 282 BC) was a Macedonian Greek [2] general, historian, and successor of Alexander the Great who went on to found the Ptolemaic Kingdom centered in Egypt
  • Ptolemy | Accomplishments, Biography, Facts | Britannica
    Ptolemy was an astronomer, mathematician, and geographer who lived during the 2nd century CE He is known for his geocentric (Earth-centred) model of the universe
  • Claudius Ptolemy - World History Encyclopedia
    Ptolemy was a keen astronomer, although he was reliant on the naked eye since the telescope was not invented until the early 17th century What Ptolemy did have access to were masses of astronomical observations taken by ancient Babylonian scientists from the 8th to the 3rd centuries BCE
  • Ptolemy - New World Encyclopedia
    Ptolemy, or in Latin Claudius Ptolemaeus (ca 90 – ca 168 C E ), was a mathematician, philosopher, geographer, map maker, astronomer, theologian, and astrologer who lived in Alexandria, Egypt
  • Claudius Ptolemy - Biography, Facts and Pictures
    Claudius Ptolemy wrote the Almagest, the work that defined astronomy for over 1,000 years The Almagest included a catalogue of over a thousand stars, recording their positions, constellations, and relative brightnesses; and a mathematical model predicting the movements of the planets
  • Ptolemy | Encyclopedia. com
    mathematical sciences, especially astronomy Our meager knowledge of Ptolemy’s life is based mostly on deductions from his surviving works, supplemented by some dubious information from authors of late antiquity and Byzantine times
  • Claudius Ptolemy (100–170) | High Altitude Observatory
    By making extensive use of the geometrical constructions known as epicycles and equants, Ptolemy constructed a mathematical model of planetary motion that did far better at predicting planetary positions than anything else produced in antiquity
  • Ptolemy I Biography - life, family, childhood, children, death, history . . .
    Ptolemy I (c 366–283 B C E ) was a Macedonian general under Alexander the Great (356–323 B C E ) and founder of the Ptolemaic dynasty of Egypt, a family of fifteen kings—all of whom were named Ptolemy—who reigned over Egypt for more than three hundred years
  • Ptolemy - Simple English Wikipedia, the free encyclopedia
    Ptolemy's system involved at least 80 epicycles to explain the motions of the Sun, the Moon, and the five planets known in his time He believed the planets and sun moved around the Earth in this order: Mercury, Venus, Sun, Mars, Jupiter, Saturn [3] This system became known as the Ptolemaic system
  • READ: Claudius Ptolemy (article) - Khan Academy
    Ptolemy synthesized Greek knowledge of the known Universe His work enabled astronomers to make accurate predictions of planetary positions and solar and lunar eclipses, promoting acceptance of his view of the cosmos in the Byzantine and Islamic worlds and throughout Europe for more than 1400 years





中文字典-英文字典  2005-2009