a系统稳定的充分必要条件为闭环系统所有特征根位于s左半平面 The system stable full essential condition is located the s left half-plane for closed-loop system all characteristic roots[translate] a这朵花闻起来很香 This flower hears very fragrant[translate] ...
If you feel suicidal, please immediately call the National Suicide Prevention Hotline at 1-800-273-8255 Other phone numbers to get help with your loneliness and depression immediately include: Samaritans 24-hour Crisis Hotline (open 24/7):212-673-3000 United Way Helpline (which can help ...
I knew that if I wanted to run the entire race and negative split, then it would be key for Mary and I to pace ourselves and not go out too fast. Luckily, the course, which was a bit more than one full loop of Prospect Park, included some big hills in that first mile which natu...
Central Park–It’s impossible to see everything there is to discover in Central Park, which is often referred to as a “runners dream” since it has multiple paths of varying difficulty, beautiful scenery and lots to enjoy. The full, outer loop of Central Park is 6.1 miles but there are...
“If you have trained in deep snow, or battled up a slippery hill into freezing sleet, or lifted your feet out of sticky clay for an hour, the race can hold no fear,” Robinson says. “If you do real winter training, Boston in April can throw nothing at you that you have not ...
7 PM — Meet on the Common next to City Hall for a short, fun ride (about 10 miles) on paths and lesser-traveled streets. We’ll ride along the Charles River and loop back on quiet streets south of the Charles. If you show up early, we’ll be happy to check over your bicycle....
If you’re a great painter, spend an hour making some art. If you can juggle, do that instead. Being challenged can be rewarding, but nothing is better for your mood than reminding yourself you’re good at something.[16] Performing a task you’re super good at can also boost your sel...
Give yourself an hour before bed to brush your teeth, change into soft pajamas, and do one restful activity, such as reading, meditating, watching a show, or listening to music. Cut down on alcohol and caffeine, and try not to nap. When a work-related or stressful thought comes to you...