排序方式: 共有16条查询结果,搜索用时 15 毫秒
1.
An optical power of 11 W from one facet has been obtained from a 1 cm integrated GaAlAs laser array for 150 ?s is pulse widths (quasi-CW operation). The array consists of 20 tenstripe lasers spaced along the bar, employing about 20% of the facet length for active laser emission. 相似文献
2.
Harnagel G.L. Vakili M. Anderson K.R. Worland D.P. Endriz J.G. Scifres D.R. 《Electronics letters》1992,28(18):1702-1704
Large arrays stacked 3 cm high, consisting of 38 laser bars 1 cm wide, have been operated at 100 W of average power and 4.5% duty cycle (2400 W peak power) with excellent spectral characteristics. Operation consisted of a burst of 10 150 mu s pulses on a 1 ms period, with burst repetition rates of up to 30 Hz. Conventional operation with 200 and 1000 mu s pulse widths is also reported.<> 相似文献
3.
Tibial shaft fracture after tibial tubercle osteotomy in total knee replacement is a rare complication. We report on a 67-year-old man who had a knee revision arthroplasty in which a long tubercle osteotomy was performed to facilitate exposure. Three weeks after surgery, he presented with a transverse shaft fracture, which became a nonunion requiring surgical management. This shaft nonunion and its solution after tibial tubercle osteotomy is discussed as well as relevant literature. 相似文献
4.
5.
水稻细菌性条斑病抗性基因定位 总被引:6,自引:0,他引:6
以高感和高抗细菌性条斑病(细条病)的两个籼稻品种H359和Acc8558为亲本,建立了一个重且自交系群体。利用该群体构建了一张包含225个分子标记的连锁图。1996年和1997连续两年对该群体进行了细条病抗性鉴定。采用t测验法、复合区间定位法及多性状复合区间定位法对细条病抗性基因(QTL)进行了定位分析。共检测出11个QTL,分别位位于第1、2、3、4、5、7、8和11号染色体上,效应大小彼此接近 相似文献
6.
7.
High power diode laser arrays 总被引:10,自引:0,他引:10
Endriz J.G. Vakili M. Browder G.S. DeVito M. Haden J.M. Harnagel G.L. Plano W.E. Sakamoto M. Welch D.F. Willing S. Worland D.P. Yao H.C. 《Quantum Electronics, IEEE Journal of》1992,28(4):952-965
Recent progress in the development of high-power diode laser arrays for solid-state laser pumping is detailed. Advances in available wavelength, efficiency, temperature of operation, duty cycle of operation, and peak and average power levels or densities are described. A packaging architecture capable of addressing the broadest range of pump applications and designs in an economic manner is defined, and a range of such package designs is presented 相似文献
8.
In Experiment 1, male rats were either defeated as a colony intruder by alpha conspecifics or had no defeat experience, and 24 hr later they were given a paw injection of formalin prior to observational tests with or without alpha-colony odors. The combination of defeat and tests with these odors produced conditioned hypoalgesia (i.e., a suppression in paw licking) and freezing. In Experiment 2, defeated rats were given either an injection of naltrexone or saline prior to defeat and 24 hr later prior to testing. An injection of naltrexone prior to defeat increased freezing during defeat and later testing. In contrast, naltrexone during testing did not affect freezing but significantly reduced hypoalgesia. In Experiment 3, a 12-hr exposure session with alpha-colony odors extinguished hypoalgesia in previously defeated rats. These findings are discussed in terms of associative, opioid/nonopioid, and adaptive evolutionary processes. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
9.
An optical fibre that can couple more than 80% of the power from a 100 ?m-wide 10-stripe diode laser array to a 50 ?m core diameter and 0.3 NA optical fibre is demonstrated. Output powers of 850 mWCW and 2.8 W pulsed (200 ns pulse width at 10 kHz repetition rate) are achieved from the output end of the fibre. 相似文献
10.
Updates data and provides information on present salaries of clinical psychologists working in internship-training centers. Salary schedules from 80 training centers approved for predoctoral internship training in clinical or counseling psychology indicate that federally-funded training centers provide the highest salaries for psychologists, and charity-supported agencies and those located in the Northeast provide the lowest salaries. (3 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献