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用户3678849 2011-6-21 10:29: The evolving face of Mathcad (Part 1); There's some exciting news about a product I've lived with—and sometimes praised, sometimes cursed—for decades: Mathcad, PTC's leading math analy ...; 3079 21 1 22

ptc mathcad math analysis tools

用户3678849 2011-6-14 11:32: Fly me to the Moon (Part 5); Physicists know that many problems can be treated as though the dynamical event happened instantaneously. Examples might include the impact of a ha ...; 3514 12 0 12

physicists patched conic sphere of influence

用户3678849 2011-6-14 11:30: Fly me to the Moon (Part 5); Physicists know that many problems can be treated as though the dynamical event happened instantaneously. Examples might include the impact of a ha ...; 2209 15 1 16

sphere of influence physicists patched conic

用户3678849 2011-6-3 14:45: Fly me to the Moon (Part 4); Read the previous part here . This is not an unreasonable approach, as long as you don't mind the 90 W part. A vertical descent is what ...; 3350 12 0 12

kiss nasa

用户3678849 2011-6-3 14:44: Fly me to the Moon (Part 4); Read the previous part here . This is not an unreasonable approach, as long as you don't mind the 90 W part. A vertical descent is what ...; 4477 14 0 14

nasa kiss satellite tool kit

用户3678849 2011-6-2 18:38: Fly me to the Moon (Part 3); Click here to view the previous part. This approach is, in fact, the same one adopted by Euler, Lagrange, and company. In their formul ...; 3357 9 1 10

lunar simulation google lunar x-prize coordinate system

用户3678849 2011-6-2 18:36: Fly me to the Moon (Part 3); Click here to view the previous part. This approach is, in fact, the same one adopted by Euler, Lagrange, and company. In their formul ...; 3591 12 2 14

google lunar x-prize lunar simulation coordinate system

用户3678849 2011-5-31 13:10: Fly me to the Moon (Part 2); Read the first part here . The three-body problem One look at figure 1 , though, tells you that this ain't your grandfathers ell ...; 3551 14 0 14

coriolis three-body problem trajectory

用户3678849 2011-5-31 13:07: Fly me to the Moon (Part 2); Read the first part here . The three-body problem One look at figure 1 , though, tells you that this ain't your grandfathers ell ...; 3277 17 0 17

geometry apollo 13 coriolis

用户3678849 2011-5-8 18:23: Fly me to the Moon (Part 1); Fly me to the moon Let me play among the stars Let me see what spring is like On a Jupiter and Mars. ...; 2398 11 0 11

nasa apollo program trajectories

用户3678849 2011-5-8 18:22: Fly me to the Moon (Part 1); with NASA, you know that I was deeply involved in the planning stages of Project Apollo. During that time, I spent a lot of energy learning neat con ...; 5043 21 1 22

nasa apollo program trajectories

用户3678849 2011-3-22 18:11: How I test software, again and again (Part 2); Hand checks Now we get to the real meat of the issue, which is how to do hand checks. I've been telling you for some time n ...; 2844 26 0 26

mathcad software test

用户3678849 2011-3-22 17:02: How I test software, again and again (Part 2); Hand checks Now we get to the real meat of the issue, which is how to do hand checks. I've been telling you for some time now ...; 2829 13 0 13

matlab software code

用户3678849 2011-3-22 17:00: How I test software, again and again (Part 1); This is the continuation of my article, " How I Test Software ". We have a lot to cover this time, so let's get right to it. I'll begin with some t ...; 2147 14 0 14

software cpu

用户3678849 2011-3-22 16:48: How I test software, again and again (Part 1); This is the continuation of my article, " How I Test Software ". We have a lot to cover this time, so let's get right to it. I'll begin with some top ...; 2988 24 0 24

mathcad programming software engineering

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