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大模场光纤研究的新进展

红外与激光工程 2011年第3期40卷 455-462页

作者：廖素英巩马理桂林空军学院广西桂林541003 清华大学精密仪器与机械学系光子与电子技术研究中心摩擦学国家重点实验室北京100084

为克服光纤非线性效应和光纤损伤等对光纤激光功率增长的限制,高功率增益光纤通常采用大模场光纤结构。总结了目前大模场光纤实现的3条主要技术途径:光纤结构设计、模式选择控制和模式转换,说明各种技术途径的基本思想及主要光纤的特点... 详细信息

为克服光纤非线性效应和光纤损伤等对光纤激光功率增长的限制,高功率增益光纤通常采用大模场光纤结构。总结了目前大模场光纤实现的3条主要技术途径:光纤结构设计、模式选择控制和模式转换,说明各种技术途径的基本思想及主要光纤的特点,在此基础上,指出:这些方法真正应用到实际还面临着模场畸变、高阶模抑制、光纤激光系统综合分析以及光纤加工工艺等需要克服的技术难题。最后,从光纤的性能特点、加工难易程度以及研究的理论和实验水平几方面综合比较,高阶模光纤的模式转换法和基于增益控制的反折射率导引方式是实现大模场光纤激光的两种最有效的方法,其模场面积的提升具有较大的空间。

关键词：光纤激光器大模场光纤模场直径模式转换

Dual-wavelength bidirectional pumped high-power Raman fiber laser

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High Power Laser Science and Engineering 2019年第1期7卷 38-46页

作者： Zehui Wang Qirong Xiao Yusheng Huang Jiading Tian Dan Li Ping Yan mali Gong State Key Laboratory of Precision Measurement Technology and Instruments & Key Laboratory of Photonics Control Technology of the Ministry of Education Tsinghua University

In this paper, we reported both the experimental demonstration and theoretical analysis of a Raman fiber laser based on a master oscillator–power amplifier configuration. The Raman fiber laser adopted the dual-wavelength bidirectional pumping configuration, utilizing 976 nm laser diodes and 1018 nm fiber lasers as the pump sources. A 60-m-long25/400 μm ytterbium-doped fiber was used to convert the power from 1070 to 1124 nm, realizing a maximum power output of 3.7 kW with a 3 dB spectral width of 6.8 nm. Moreover, we developed a multi-frequency model taking into consideration the Raman gain spectrum and amplified spontaneous emission. The calculated spectral broadening of both the forward and backward laser was in good agreement with the experimental results. Finally, a 1.5 kW, 1183 nm second-order Raman fiber laser was further experimentally demonstrated by the addition of a 70-m-long germaniumdoped passive fiber.

关键词： fiber laser fiber optics amplifiers and oscillators Raman laser

Effect of Lateral Restraint on Buckling Behaviour of a Thin-Walled Z-Section Column

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Journal of Civil Engineering and Architecture 2020年第9期14卷 516-524页

作者： Tanja mališ DianaŠimićPenava Antonia Jaguljnjak Lazarević Faculty of Mining Geology and Petroleum EngineeringUniversity of ZagrebPierottijeva 6Zagreb 10000Croatia Faculty of Civil Engineering University of ZagrebFra Andrije Kačića-Miošića 26Zagreb 10000Croatia

The aim of this paper is to interpret the effect of lateral restraint on buckling behaviour of a Z-cross section column subjected to pure axial *** analytical solutions are compared with the numerical and experimental results obtained for specimens both laterally free and those restrained by trapezoidal steel *** to the unrestrained column,a large relative increase of critical loads is ***,further optimization of such structural elements is possible.

关键词： Z-section column lateral restraint buckling resistance finite element method

Influence of Wheelchair Cushions Fabricated by Therapists on Stability, Comfort, and Functionality

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Open Journal of Therapy and Rehabilitation 2020年第1期8卷 1-11页

作者： Takeshi Oshikawa Seigo koura Nishikawa Chihoko Kazuho Nagao Kentaro Higashi Department of Rehabilitation Nishikyusyu University Saga Japan Social Welfare Corporation Kanjikai Japan

“Ease of comfort” and “functionality” are important factors that have been cited to improve wheelchair seating. The ability to maintain balance and posture while seated in a wheelchair improves stability, comfort, and functionality and is a prerequisite for daily activities. In this study, the authors used a sitting position measuring device to scientifically verify differences in sitting posture, comfort, and functionality depending on the presence or absence of cushions and the type of cushion in elderly individuals who used wheelchairs. Results suggested that a cushion fabricated by a therapist was more useful than a commercially available air cushion. While a commercially available air cushion was the most suitable, the therapist’s self-made cushion could be expected to demonstrate the same or better applicability than an air cushion.

关键词： Wheelchair Sitting Stability Cushion Comfort Functionality

Quality of Life of Patients with Metastatic Breast Cancer Treated with Epirubicin and Docetaxel

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International Journal of Clinical Medicine 2011年第3期2卷 346-351页

作者： Jaana Korpela Pekka mali Anne Kaljonen Eeva Salminen 不详

This phase II study assessed the clinical response and short-term quality of life of patients receiving first-line chemotherapy with epirubicin-docetaxel combination for metastatic breast cancer. Thirty-one breast cancer patients were treated with epirubicin (75 mg/m2 for 15 minutes) followed one hour later by a one-hour infusion of docetaxel (75 mg/m2) q3w. EORTC QLQ-C30 and EORTC QLQ-BR23 forms were filled in at baseline, and at the second and eighth cycle of chemotherapy. The combination of epirubicin and docetaxel provided a high degree of clinical benefit. Clinical response was observed in 17 patients (55%), including five (16%) complete responses and 12 (39%) partial responses. Of responding and stable patients 23 (74%) maintained the same status for at least six months (clinical benefit). The mean survival time was 40.8 months. During the treatment the emotional functioning improved and the concerns about the future were relieved. Some aspects of quality of life were impaired, with slightly decreased physical and cognitive functioning, distress related to body image and hair loss, and adverse effects of chemotherapy. Overall, the global quality of life was maintained.

关键词： Metastatic Breast Cancer Chemotherapy Epirubicin Docetaxel Quality of Life

Effects of Hand Care Therapy on Reducing the Conversion Rate from MCI to Dementia and Role of COVID-19 as Non-Pharmacotherapy

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Open Journal of Therapy and Rehabilitation 2020年第3期8卷 42-52页

作者： Seigo koura Akiko Ikeda Yasuhiko Fujioka Yasuhiro Mizogami Kentaro Higashi Takeshi Oshikawa Faculty of Rehabilitation Nishikyusyu University Kanzaki City Japan Sophia Phyto-Therapy College Tokyo Japan Fujioka Hospital Saga City Japan MIZ Holdings Ltd. Saga City Japan Social Welfare Corporation Kanjikai Miyakonojyo City Japan

Dementia needs to be addressed by various researchers to reduce the risk of morbidity and progression. And dementia was regarded as one of lifestyle-related diseases, and it is estimated that about 10% of MCI (Mild cognitive impairment) progresses to dementia in one year. In this study, we examined whether hand care therapy (HCT) as one of passive horticultural therapy was effective in preventing dementia/MCI. In result, the use of HCT was shown to be effective in preventing dementia and MCI illness and slowing progression. The elderly people tended to decrease iADL year by year, but the HCT group did not. In addition, the senile depressive tendency, which is said to be increasing year by year, tended to be reduced in the HCT-treated group. This is thought to be due to not only the healing effect of the massage by HCT treatment and the effect of transmitting the pleasant stimulus from the tactile sense to the frontal lobe, but also the true communication effect created by sitting gently and touching the hand. This HCT technique can improve the euphoria of the treated side and the treated side. Therefore, it can be expected that the autoimmunity of all people involved can be improved, and it can be judged to be promising as a preventive technique and non-pharmacotherapy for lifestyle-related diseases and various infectious diseases like COVID-19.

关键词： Dementia MCI Conversion Hand Care Prevention COVID-19

Characterization Production Systems and Productivity Indices of Local Pigs of East Timor

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Journal of Agricultural Science and Technology(A) 2020年第3期10卷 147-150页

作者： Graciano Soares Gomes Carlito de Araujo mali Code Department of Animal Science Faculty of AgricultureNational University Timor Lorosa'eP.O.Box 10000DiliEast Timor

The objective of this study was to evaluate the production system and productivity indices of local swine raised in subsistence production system in East *** 1,096 respondents were interviewed in fitting villages in eight *** each village,10%of breeders were interviewed as respondents,using simple random method and the interviews based on established *** was observed that about 80%-90%of total respondents still used subsistence production *** result of descriptive statistical analysis showed that the average of piglets per litter was 4-6 and weight of piglets at birth was 0.97±0.22 *** age of weaning of piglets and the weaning weight was 3.94±0.72 months and 5.56±0.88 kg,*** age of the first breeding gilts was 8-10 months;calving interval was 6-12 *** period of females was 3-12 years,and the number of mortality rate of piglets was 0.17%to 1%per production *** it was concluded that the subsistence production system could affect the productivity level of local pigs.

关键词： Production subsistence systems productivity indices local pigs

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银屑病患者求医行为与健康教育情况调查

中国皮肤性病学杂志 2017年第1期31卷 76-78页

作者：马莉青海省西宁市第一人民医院皮肤科青海西宁810000

目的调查西宁地区银屑病患者的求医行为现状,分析患者对银屑病知、信、行情况,探讨影响其求医的因素,进行健康教育,引导银屑病患者正确求医。方法对我科70例银屑病患者(包括寻常性、脓疱型、红皮病型及关节型患者)进行问卷调查,内容包... 详细信息

目的调查西宁地区银屑病患者的求医行为现状,分析患者对银屑病知、信、行情况,探讨影响其求医的因素,进行健康教育,引导银屑病患者正确求医。方法对我科70例银屑病患者(包括寻常性、脓疱型、红皮病型及关节型患者)进行问卷调查,内容包括银屑病家族史、对银屑病的自我认知、求医行为、皮肤病生活质量指标等。结果经过规范的健康教育后,70例银屑病患者在疾病认知程度和依从性等方面较前明显提高,差异有统计学意义(P<0.01)。结论该调查显示需规范西宁地区银屑病患者的求医行为,加强健康教育促进银屑病的规范诊治。

关键词：西宁地区银屑病健康教育

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测量三维力的矩阵方法

农机化研究 1994年第1期16卷 49-54页

作者：孟庆兰 mali.,RJ 东北农业大学

测量三维力的矩阵方法孟庆兰译张元禄校（东北农业大学）１引言对于耕作机具的最佳设计来说，分析其在作业过程中土壤与工作部件系统间相互作用的三维力和力矩具有极为重要的意义。人们曾运用不同的技术和分析方法来获取必要信息，对上... 详细信息

测量三维力的矩阵方法孟庆兰译张元禄校（东北农业大学）１引言对于耕作机具的最佳设计来说，分析其在作业过程中土壤与工作部件系统间相互作用的三维力和力矩具有极为重要的意义。人们曾运用不同的技术和分析方法来获取必要信息，对上述作用力与力矩进行估计。在所用过的...

关键词：耕作机具三维力矩阵力矩传感器