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云南天文台1m望远镜卡焦(缩焦)CCD测光系统的初步研究 被引量:1
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作者 潘炼德 曹明 《天体物理学报》 CSCD 1998年第1期106-112,共7页
用云台1m望远镜镜卡焦(缩焦)CCD测光系统对测光标准星进行了BVRI四色测光,计算得到了该系统的转换方程及其转换结果,并对计算结果进行了分析讨论.
关键词 恒星 转换方程 CCD测光系统 望远镜 卡焦
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2.16米天文望远镜光学系统的调整
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作者 李德培 《光仪技术》 2000年第3期1-6,38,共7页
中国目前最大的光学天文望远镜其通光口径为2.16米,于1989年成功的安装在北京天文台兴隆观测站。经过多年的应用及国际联合观测,又取得了大批有价值的天文资料,从而取得了一批有影响的天文成果。该设备已于1996年12月... 中国目前最大的光学天文望远镜其通光口径为2.16米,于1989年成功的安装在北京天文台兴隆观测站。经过多年的应用及国际联合观测,又取得了大批有价值的天文资料,从而取得了一批有影响的天文成果。该设备已于1996年12月通过了国家鉴定。1997年获中国科学院科技进步一等奖,1998年获中华人民共和国科技进步一等奖。1997年又对主、副镜重新进行了镀膜,对光学系统进行了调整。 展开更多
关键词 天文望远镜 光学系统 调整 卡焦 折轴
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2.16米天文望远镜光学系统的调整
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作者 李德培 《光学仪器》 2001年第2期30-36,共7页
叙述了 2 .1 6米天文望远镜卡焦及折轴光学系统的调整原理与具体步骤。调整后用恒星在卡焦光学系统焦面拍摄了刀口阴影图 ,加入熔石英像场改正镜后 [1] ,还拍摄了全视场的恒星星团照片 ,全视场底片线尺寸为 30 cm× 30 cm。结果显... 叙述了 2 .1 6米天文望远镜卡焦及折轴光学系统的调整原理与具体步骤。调整后用恒星在卡焦光学系统焦面拍摄了刀口阴影图 ,加入熔石英像场改正镜后 [1] ,还拍摄了全视场的恒星星团照片 ,全视场底片线尺寸为 30 cm× 30 cm。结果显示 ,在全视场内从中心到边、角所有的星像都很圆 ,对其线大小测定 ,暗星直径为 0 .1 8mm~ 0 .2 0 mm。 展开更多
关键词 天文望远镜 光学系统 调整 卡焦 折轴
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Monte Carlo simulation for the sputtering yield of Si_3N_4 thin film milled by focused ion beams 被引量:1
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作者 TAN Yong-wen SONG Yu-min +2 位作者 ZHOU Peng WANG Cheng-yu YANG Hal 《Optoelectronics Letters》 EI 2008年第4期273-275,共3页
The sputtering yield of the Si3N4 thin film is calculated by Monte Carlo method with different parameters. The dependences of the sputtering yield on the incident ion energy, the incident angle and the number of Galli... The sputtering yield of the Si3N4 thin film is calculated by Monte Carlo method with different parameters. The dependences of the sputtering yield on the incident ion energy, the incident angle and the number of Gallium (Ga) and Arsenic (As) ions are predicted. The abnormal sputtering yield for As at 90 keV occurs when the incident angle reaches the range between 82° and 84°. 展开更多
关键词 氮化硅薄膜 反应溅射法 离子束 蒙特洛法
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The Origin of Tar AI-Say'ed and Tar AI-Najaf, Karbala-Najaf Vicinity, Central Iraq
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作者 Varoujan K. Sissakian Mawahib F. Abdul Jab'bar +1 位作者 Nadhir A. Al-Ansari Sven Knutsson 《Journal of Civil Engineering and Architecture》 2015年第4期446-459,共14页
In central part of Iraq within the vicinity of Karbala-Najaf, two cliffs called "Tar Al-Say'ed" and "Tar Al-Najaf" form conspicuous geomorphological forms between the Mesopotamia Plain and the Western and Souther... In central part of Iraq within the vicinity of Karbala-Najaf, two cliffs called "Tar Al-Say'ed" and "Tar Al-Najaf" form conspicuous geomorphological forms between the Mesopotamia Plain and the Western and Southern Deserts. The top surface between the two cliffs (tars) is covered by alluvial fan sediments, laid down by A1-Khir Valley when merging in a large depression due to the drop in the gradient of the valley. Consequently, the depression was divided into two parts, to the left is called Al-Razzazah Depression, whereas to the right is called Bahir Al-Najaf. This affected the course of the River Euphrates. The deposition stopped due to an uplift movement which caused the elevation of the two cliffs which are covered by alluvial fan sediments. The two cliffs had and are still suffering from retreating, due to lateral erosion by wave actions in Al-Razzazah Depression. Springs located along a straight line, sag pond, deflected drainage, shutter ridges and pressure ridges can be noticed in the area. The age of both cliffs is estimated to be upper Late Pleistocene--early Holocene. 展开更多
关键词 NEOTECTONIC erosional cliff alluvial fan PLEISTOCENE Iraq.
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Effectiveness of Mesotherapy on Temporomandibular Joint Disorders 被引量:1
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作者 Andre Pedro Oliveira Cruz Ana Filipa Rodrigues das Neves Isabel Ramires Manuel Mendonca 《Journal of Physical Science and Application》 2015年第4期249-254,共6页
TMJDs (Temporomandibular joint disorders) are a common pathology but best treatment remains unclear. The goal of this study was to evaluate the effectiveness of mesotherapy on TMJD. We conducted a case review of all... TMJDs (Temporomandibular joint disorders) are a common pathology but best treatment remains unclear. The goal of this study was to evaluate the effectiveness of mesotherapy on TMJD. We conducted a case review of all TMJD patients treated since 2006 with mesotherapy procedures only and using a cocktail of drugs composing of lidocaine, piroxicam and pentoxifylline. Patients were treated every 15 days until symptomatic relief was achieved and thereafter every two months. Main outcome was complete symptomatic relief, and associated factors were analysed. 27 patients were included. Complete pain relief was achieved in 26. The necessary number of procedures to get pain relief ranged from 1 to 6 (median of 1) and the total number of treatments from 1 to 40 (median of 11). 19 patients had other painful complains mainly related with anxiety disorders. A weak correlation (r = 0.357; p = 0.05) between anxiety disorders and the required months of treatments was found. Mesotherapy is a valuable option on pain relief in a temporomandibular pain syndrome with none of the systemic effects of oral medication. Anxiety may have a role on the aetiology and therapeutic success highlights the holistic approach of these patients. Future comparative studies are necessary. 展开更多
关键词 TMJDs (Temporomandibular joint disorders) MESOTHERAPY pain.
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Monte-Carlo based cascade control approach with focus on real overactuated space systems
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作者 M.Shahi A.H.Mazinan 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第12期3171-3182,共12页
The present research relies on a cascade control approach through the Monte-Carlo based method in the presence of uncertainties to evaluate the performance of the real overactuated space systems.A number of potential ... The present research relies on a cascade control approach through the Monte-Carlo based method in the presence of uncertainties to evaluate the performance of the real overactuated space systems.A number of potential investigations in this area are first considered to prepare an idea with respect to state-of-the-art.The insight proposed here is organized to present attitude cascade control approach including the low thrust in connection with the high thrust to be implemented,while the aforementioned Monte-Carlo based method is carried out to guarantee the approach performance.It is noted that the investigated outcomes are efficient to handle a class of space systems presented via the center of mass and the moments of inertial.And also a number of profiles for the thrust vector and the misalignments as the disturbances all vary in its span of nominal variations.The acquired results are finally analyzed in line with some well-known benchmarks to verify the approach efficiency.The key core of finding in the research is to propose a novel 3-axis control approach to deal with all the mentioned uncertainties of space systems under control,in a synchronous manner,as long as the appropriate models in the low-high thrusts are realized. 展开更多
关键词 Monte-Carlo based method cascade control approach overactuated space systems low-high thrusts models
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超出你的想象松下AG-UX180MC评测
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作者 冷山 《世界广播电视》 2017年第2期92-93,共2页
松下UX系列摄录一体机自发布以来。就备受广大影视从业者的关注。松下UX系列全称:ULTRA AND XTREME.寓意打破限制,超出想象,带来极致体验。笔者有幸拿到了松下刚发布不久的UX系列明星机型AG-UX180MC(以下简称:UX180),用了一段... 松下UX系列摄录一体机自发布以来。就备受广大影视从业者的关注。松下UX系列全称:ULTRA AND XTREME.寓意打破限制,超出想象,带来极致体验。笔者有幸拿到了松下刚发布不久的UX系列明星机型AG-UX180MC(以下简称:UX180),用了一段时间,把真实感受跟大家分享一下。 展开更多
关键词 松下 微距 AG-UX1 80MC 20倍光学变镜头 光学防抖
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