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摘要

静脉穿刺是医疗行业中最基本的、临床应用最广泛的护理技术操作之一,静脉注射也成为临床治疗、抢救病人的重要给药途径。但是,由于有些特殊人群的血管并不容易找到,比如儿童、胖人、老人、长期静脉注射的人、肤色较深的人等一次注射成功的情况甚少,因此会增加病人的痛苦和加大护士的心理压力,并容易产生医疗纠纷。

PDF全文 光电产品与资讯 | 2014,5(03):40-41
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0 1938 1655

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PDF全文 光电产品与资讯 | 2011,2(06):25-26
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0 1330 1729
N/A

摘要

作为无人机的“头脑”和“眼睛”,光电载荷在无人机系统中起着举足轻重的作用,且往往也是无人机系统中造价较高的部分。美国MQ-1“捕食者”多用途无人机中的MTSA 光电载荷几乎和无人机平台本身的价格一样,“全球鹰”无人机的RQ-4 BLOCK10综合传感器系统的造价占无人机总成本的33%,BLOCK20 综合传感器系统造价占总成本的比重将上升到54%。作为无人机系统的重要组成部分,光电载荷的发展也是无人机系统发展的

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0 1123 884

摘要

Light chirp is a major issue in optical fiber links. This letter deals with precise characterizations of the frequency chirp parameters of reflective semiconductor optical amplifiers (RSOAs). The RSOA chirp properties are represented by transient and adiabatic chirps, whose parameters are characterized utilizing a ratio between the phase and the amplitude modulation depths of t

PDF全文 Chinese Optics Letters | 2013,11(s2):S20607
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0 1022 2393

摘要

A closed-form bit-error rate (BER) expression is derived for free-space optical (FSO) communication systems with circle polarization shift keying and spatial diversity receivers in the gamma-gamma (GG) distribution fading channel. This model can predict the performance without the need of lengthy simulation runs. The performance can be analyzed by some system parameters such as

PDF全文 Chinese Optics Letters | 2013,11(s2):S20101
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0 995 3063

摘要

We report the dark blue nonlinear Cerenkov radiation by the second harmonic generation (SHG) in a two-layer-stacked hexagonal periodically-poled-MgO: LiNbO3s (PPMgOLNs). Based on the direct wafer bonding of two target PPMgOLNs rotating around the axis perpendicular to the plane with an angle of 30o, twelve bright spots as twice of those in a single PPMgOLN are shown at each sec

PDF全文 Chinese Optics Letters | 2014,12(03):030501
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0 862 2845
展品预览 2016-03-03
N/A

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0 846 562

摘要

We discuss a merit function F as judgment of photo-thermal conversion efficiency instead of two independent parameters: solar absorptance \alpha and thermal emittance \varepsilon. The merit function F is developed using Essential Macleod software to optimize the photo-thermal conversion efficiency of solar selective coating. Bruggeman and Maxwell-Garnett models are used to cal

PDF全文 Chinese Optics Letters | 2013,11(s1):S10501
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0 812 2011

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In this letter, we investigate the structural, optical, and electrical properties of Al-doped ZnO (AZO) thin film coating prepared by direct current (DC) facing-target sputtering method at room temperature, of which the average optical transmittance is 81% between 400 and 700 nm while the sheet resistance is about 10 \Omega/. Then, based on this AZO coating, in order to enhanc

PDF全文 Chinese Optics Letters | 2013,11(s1):S10103
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0 796 2253

摘要

A high-sensitivity long-period fiber grating (LPFG) methane sensor that contains a compact and uniform styrene-acrylonitrile (SAN)/cryptophane A nanofilm is presented. The sensor is prepared by using an automatic dip-coater in a solution of cryptophane A, SAN resin dissolved in ortho-dichlorobenzene, a low-volatile solvent. The effect of film thickness on the LPFG's resonant wa

PDF全文 Chinese Optics Letters | 2013,11(08):080601
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0 769 2826
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