Difference between revisions of "User talk:Hijing"

Revision as of 01:59, 16 August 2008

what is electronic compassing, gyroscope, Level, Angle sensor, Accel Sensor and angle sensor.

what is electronic compassing, gyroscope, Level, Angle sensor, Accel Sensor and angle sensor. develops and manufactures custom products for marine, air, and land-based applications with a concentration in electronic compassing（电子罗盘）

The gyroscope（陀罗仪） was invented in 1852 by the French experimental physicist Leon Foucault (1819-1868) as part of a two-pronged investigation of the rotation of the earth. The better-known demonstration of the Foucault pendulum showed that the plane of rotation of a freely-swinging pendulum rotated with a period that depends on the latitude of its location. His gyroscope was a rapidly rotating disk with a heavy rim, mounted in low-friction gimbals. As the earth rotated beneath the gyroscope, it would maintain its orientation in space. This proved to be hard to do in practice because the frictional forces bring the spinning system to rest before the effect could be observed. The gimbal bearings also introduce unwanted torque. But, the principle is well-known to all children who move their toy gyroscopes about and observe that the spinning disk stays in the same orientation

Level（水平仪） will help you design and build homes which have less impact on the environment and are healthier, more comfortable, and have lower running costs. The Angle sensor（角度传感器）allows accurate measurement of angles between 0 and 270 degrees. The shaft does not allow continuous rotation. This sensor is useful in designs that have limited rotation and need to measure the angle with resolution down to one degree. It can also be used as a knob to "dial in" a variable to your program. This sensor must be connected to the three wire converter brick for proper operation The Accel Sensor（加速传感器） lets your robot measure it's acceleration. The sensor can also be used to measure tilt. This is a two channel device that lets you measure acceleration or tilt along two perpendicular axis The key to efficient bending lies in a bending angle sensor（倾角传感器）, which besides measuring automatically, adjusts the angle to the required rated value. The ACB angle sensor developed by TRUMPF can do both: measuring and adjusting in the process. Every angle is automatically correct . Complicated and time consuming bending programme run-in phases are now a thing of the past. The system automatically and independently controls the change in the spring-back angle of different materials and material properties.

Tickets scheduledand Special fares

Tickets scheduledand Special fares

Tickets scheduled(机票预定)and Special fares(特价机票) sells tickets over the web using a peculiar system sort of like an auction. You tell them where and when you want to go and how much you're willing to pay. You have to be prepared to go at any time of day, on any major domestic airline or one of a list of international ones, and to accept a stop or change of plane. You tell them what you're willing to pay, along with credit card info. If they find a ticket at that price, you've bought it and can't change or refund it (like most any low-price ticket.) Flights must originate in the U.S., or via an affiliate, in the U.K. If they have a ticket available at or below your bid, they'll sell it to you, but you don't know if you're getting the best price. They'll charge what you offered even if the carrier would have accepted less, and they make it difficult to offer increasing bids. They now offer seats on many the major US airlines and international airlines. except A lot of reports, including articles in the Consumer Reports Travel Letter, and the Wall Street Journal, say that in practice bids for lower than published prices are rarely accepted, and they admit that they accept less than 10% of the bids people make, although they do sell 15,000 tickets a day. They now also offer normal tickets where you know the price and the flights ahead of time. I don't see any reason to buy from them rather than anyone else, but this does at least tell you what the list price is so you don't bid any higher than that. I haven't ever bought a ticket through Priceline, but would welcome more reports from people who have. (I tried to get a NYC hotel room one time, they turned down all my offers, but I've heard from at least one person who got a room at a nice Boston hotel for about half the normal price.) The idea of auctioning left-over tickets is a good one, and it's a shame if it can't be put into practice. If you're planning to travel on a route well-served by one of the airlines listed above, and can fly at any time of day, try bidding slightly less than the best fare you can find on one of the regular reservation sites or Hotwire and see if they take it. Otherwise, you're better off with a agent who knows about unpublished fares, many of whom are listed in subsequent sections of this FAQ. have a good journey you should have good Tickets scheduled(机票预定), Special fares(特价机票) is the best way to Save money, enjoury yourself!