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Spacecraft flew hundreds of thousands to hundreds of millions of kilometers from the earth, injecting speed when the size and direction of a slight error, arrived at target planets will appear large deviation error, for example, when Mars probe injecting speed 1 m/s speed (about one over ten thousand), arrived at Mars, about 100000 km distance deviation. Therefore, precise control and navigation must be carried out during the long flight. Flying to the moon is usually controlled by the orbital control system of the ground and space probe (see orbit control). Interplanetary flight distances, radio signal transmission time is long, the real-time remote control, can't so planets and interplanetary spacecraft orbit control system shall have the ability of autonomous navigation (see interstellar travel navigation and control). The United States, for example, "pirates" spacecraft in space flight of more than eight hundred million km, for 11 months of 2000 times of autonomous orbit adjustment, the final surface to achieve a soft landing on Mars, placement accuracy up to 50 km. In addition, in order to ensure the accuracy of the orbit control engine, the communication antenna is always aimed at the earth, and other systems work normally, and the detector has the autonomous attitude control ability
Many people prefer cars over motorcycles. But a lot of people also prefer a motorcycle more than a car. You may prefer to ride a bicycle because you tend to be comfortable on it than inside a car, but other like to drive a vehicle than ride since they feel secure being incased with a metal. There are many differences between a car and a motorcycle and are also our personal preferences. There is a constant debate of what is better on the list of two.
All non-believers, who don't think that "rock and roll" is dead, should check out today's music charts. Whether its Billboard or Rolling Stone or America's Top 40, the top of the charts are ruled by such artists as Rihanna, Lil' Wayne, Kelly Clarkson, Bruno Mars, and LMFAO, it's unlikely that any rock artist in the bunch.
Windows PCs can be used as general purpose computers for all those varieties of such things as writing letters, editing photos or surfing the Web. However, there's also specialized use times when the PC is supposed to be used only in a very restricted way. Imagine a public kiosk terminal which could only be utilized to allow Web browsing in order to provide usage of an individual, specialized application as being a booking system. Also terminals in museums or at exhibitions have special requirements in terms of security and functionality. In most cases the underlying os (Windows) have to be secured and locked down in a fashion that merely a predefined application can be executed understanding that the conclusion user has no further use of other applications or critical os functions.
The nurses are few, the patient is many, is I from July 1984 to attend nursing work till now, has not solved the difficult problem. This is not something that a nurse can solve, but a nurse who needs to be put to the attention of the government. "The nurse management approach" and "the regulations on the nurse, expressly provides for hospital beds and the proportion of nurses is 1-0. 4, but carry out to every department of the hospital, is short of this standard. When I was working in a beachhead hospital, 10 nurses were responsible for more than 100 inpatients, except for outpatient patients. In longhui county hospital of traditional Chinese medicine, the conditions are better, and now there are 14 nurses who are responsible for the treatment of 50 or 60 hospitalized patients (there are only 52 beds in the ward, but often extra beds). When no one can replace or help we nurse care of the patient, we are going to the hospital leadership many times is useless, because the increase of the nursing staff is always can't keep up with the increase of number of patients, because when recruiting nurses, may not have enough nurses to apply for, as well as the nurse outflow phenomenon. Can't change the reality, can only change myself, nurse only work hard, to explain to patients' families more, guide them how to observe his condition, make the patient's life care, psychological care, medication nursing, functional exercise, etc., the patient very family cooperation can be achieved, to reach the expected effect of treatment and care, to avoid mistake on accident. Sometimes, nurses have to ask the doctor to help us to work together, even if they watch a office or (later only a nurse to work the night shift, nurses to ward rounds, or treatment and care, no one in the office, someone to come to the office to find doctors and nurses to do, or how someone stole drug treatment), or even please guard escort situation as well. "Aunt, please help me to look after, I go to the ward to give a patient infusion, the catheter, have a bed to call me."
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