web音樂搜索軟件的設(shè)計(jì)與實(shí)現(xiàn)—免費(fèi)畢業(yè)設(shè)計(jì)論文-資料下載頁
2024-11-23 16:44本頁面
【導(dǎo)讀】Inter的快速發(fā)展，海量信息和人們獲取所需信息能力之間的矛盾日益明顯，在信息海洋里查找信息，如同大海撈針一樣,搜索引擎恰好解決了這一難題。詢?yōu)橐惑w的搜索軟件。該系統(tǒng)能完成對(duì)互聯(lián)網(wǎng)的音樂信息的采集、分析、分類、保存和查詢等功能；經(jīng)過測試與分析，說明本系統(tǒng)運(yùn)行穩(wěn)定、可靠，具有一定的實(shí)用價(jià)值。
【正文】 tick and they watched for final confirmation that they were where they wanted to be. This is Ringmaster。 C. bones manding. We have arrived in Saturn orbit at hours, U niversal Time. I39。ll send up the prelims for a correcting burn when we e out from behind. Meanwhile, I39。m going off this channel. She slapped the appropriate switch. Anybody who wants to take a look outside, this is going to be your only chance. It was tight, but August and April and Gene and Calvin man aged to squeeze into the cramped room. After checking with Gaby, Cirocco turned the ship niy degrees. Saturn was a dark gray hole, seventeen degrees wide, covering 1000 times the area of the moon as seen from Earth. The rings w ere an incredible forty degrees from side to side. They looked like solid, brilliant metal. Ringmaster had e in north of the equator, so the upper face was presented to them. Each partic le was being lit from the opposite side, presenting a thin crescent, like Saturn. The sun was a brilliant point of light in the ten o39。clock position, approaching Saturn. No one spoke as the sun drew nearer to eclipse. They saw Saturn39。s shadow fall across the part of the ring nearest them, cutting it like a razor. Sunset lasted fifteen seconds. The colors were deep and changed rapidly, pure reds and yellows and blueblacks like those seen from an airliner in the stratosphere. There was a soft chorus of sighs in the cabin. The glass depolarized and everyone gasped again as the rings grew brighter, br acketing the deep blue glow that outlined the northern hemi sphere. Gray striations became visible on the plaary surface, illuminated by ringlight. Down there were storms as big as the Earth. When she looked away at last, Cirocco saw the screen to her left. Gaby was still in SCIMOD. There was an image of Saturn on the screen above her head, but she didn39。t look up at it. Gaby, don39。t you want to e up and see this? Cirocco saw her shake her head. She scanned the numbers marching across a tiny screen. And lose the best observing time of the whole trip? You39。ve got to he out of your mind. They first assumed a long, elliptical orbit with a low point 200 kilometers above the theoretical radius of Themis. It was a mathematical abstraction because the orbit was tilted thir ty degrees from Themis, equator, which put them above the dark side. They passed the spinning toroid to emerge on the sun side. Themis lay spread out before them as a nakedeye object. Not that there was a lot to see. Themis was nearly as black as space, even with the sun shining on it. She studied the huge mass of the wheel with the triangular solar absorption sails rimming it like sharp ge ar teeth, presumably soaking up sunlight and turning it into heat. The ship moved over the interior of the great wheel. The spokes became visible, and the solar reflectors. They seemed nearly as dark as the rest of Themis, except w here they mirrored some of the brighter stars. The problem that still worried Cirocco was the lack of an entrance. There was a lot of pressure from Earth to get into the thing, and Cirocco, despite her cautious instincts, wanted to as badly as anyone else. There had to be a way. No one doubted Themis was an artifaI think The docking facilities! Cirocco yelled. They39。re gonna grab us! Bill, start the engine sequence, stop the carousel, get ready to move. But it39。ll take us thirty minutes I know. Move! She caromed off the viewport and into her seat, reached for her microphone. All hands. Emergency status. Depressurization alert. E vacuate the carousel. Acceleration stations. Strap in. She slammed the alarm button with her left hand and heard the eerie hooting begin in the room behind her. She glanced to her left. You too, Bill. Get suited. But Now! He was out of his seat and diving through the access hatch. She turned and called over her shoulder. Bring my suit back with you! The object was visible out the w indow now, approaching fast. She had never felt so helpless. By overriding the attitude contr ol system39。s programing she was able to fire all the thrusters on the side of the ship facing Themis, but it was not nearly enough. The great mass of Ringmaster barely moved. Other than that, she could only sit a nd monitor the automatic engine sequencing and count the seconds as they dragged by. In a short time she knew they could not escape. That thing was big, and moving faster. Bill appeared, suited, and she scrambled into SCIMOD to don her own suit. Five anonymous figures sat be lted to acceleration c ouches, not moving, staring at the screen. She clamped her helmet, and heard chaos. Quiet down. The chatter died away. I want silence on the suit channel unless 1 ask you to speak. But what39。s happening, Commander? It was Calvin39。s voice. 第 23 頁 共 21 頁 I said no talking. It looks like an automatic device is going to pick us up. This must he the docking facilities we were looking for. It looks more like an attack to me, August muttered. They must have done this before. They must know how to do it safely. She wished she could convince herself of that. it didn39。t help her credibility when the whole ship shuddered. Contact, Bill said. It39。s got us. Cirocco hurried back to her station, just in time to miss seeing the grapple sweep over them. The ship jumped again, and awful noises came from the rear. What did it look like? Great big octopus tentacles without the suckers. He sounded shaken. Tthere were hundreds of them, waving around all over. The ship gave an even greater lurch, and more alarms began to sound. A firestorm of red lights spread across her controls. We39。ve got a hull rupture, Cirocco said, with a calmness she did not feel. Losing air from the central stem. Sealing off pr es sure doors 14 and IS. He hands moved over the controls wi
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