Guangtongxin yanjiu, 2018 围绕下一代光纤通信系统中轨道角动量（OAM）复用技术的关键问题,基于环状光纤中携带OAM的模式基础理论,仿真分析了环状光纤的不圆度对矢量合成OAM模式的本征奇模和偶模的有效折射率、走离长度以及模场强度分布的影响。结果表明,环状光纤不圆度会使得本征模式奇偶模之间的有效折射率差增大,走离长度减小,导致相应OAM模式在环状光纤中传输时稳定性下降。同时,不圆度的存在还会使矢量合成OAM模式的各本征模式的模场强度分布发生畸变,模场泄漏加剧。
张丽丽, 张霞, 白成林
doaj
Zhongshan Daxue xuebao. Yixue kexue ban, 2017 【目的】探讨过夜配戴角膜塑形镜（OK镜）治疗青少年轻度、中度及高度近视的效果差异。【方法】前瞻性病 例研究。收集 54 例（107 眼）青少年近视患者，平均年龄（11.6 ± 2.4）岁，按患者戴镜前等效球镜度分为低度近视组（51 眼，-0.75 ~ -3.00 D）、中度近视组（36眼，-3.25 ~ -5.00 D）及高度近视组（20眼，-5.25 ~ -9.00 D）。观察配戴前1天及配戴1 年后3组内及组间等效球镜度、中央角膜厚度、角膜曲率、前房深度和眼轴变化。【结果】轻度近视组 ...
姚卫兰 +4 more
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Shuitu Baochi Xuebao, 2017 采用盆栽试验，研究了不同W-OH喷施浓度（1%，3%，5%）对玉米生长及土壤养分淋失的影响。结果表明：与对照（不喷施W-OH）相比，喷施W-OH对玉米生长有促进作用，且这种作用自玉米生长中期逐渐明显。试验条件下，低、中浓度W-OH（1%和3%）更有利于玉米生长；盆栽3个月后，与对照相比，低、中浓度处理下玉米株高分别增加16%和35%，净光合速率分别增加3%和17%，气孔导度分别增加34%和79%，蒸腾速率分别为对照的2倍和3倍。降雨量对W-OH的保水作用影响不同，小雨和中雨下，3%浓度处理的渗流量最低 ...
张冠华 +5 more
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[Comparative observation of analgesic efficacy between liposomal bupivacaine and "cocktail" therapy following artificial intelligence-assisted direct anterior approach total hip arthroplasty: A prospective randomized controlled study]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhai Y +8 more
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Beijing Da Xue Xue Bao Yi Xue BanLi B, Liang H.
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Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiFeng W, Chang B, Wang C, Fan B.
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[Clinical efficacy and prognostic factors of pulpotomy combined with fragment reattachment in treating complicated crown-root fractures of maxillary young permanent anterior teeth]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiYang X +5 more
europepmc +1 more source
Experimental Study on Refrigeration Performance of Cylinder Active Magnetic Regenerator of Room Temperature Magnetic Refrigeration [PDF]
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[Advancements in biomechanics and orthodontic strategies for clear aligner therapy]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiLei X, Jin F.
europepmc +1 more source