光纤光化学氨传感器的研究及应用

氨是导致海洋水体富营养化的重要因素之一，基于光纤光化学检测的氨传感器特别适于氨的原位或在线分析。文章介绍了光纤光化学氨传感器的基本原理，光纤敏感膜的制备方法及其一些应用管况。发展小型、实用的光纤光化学传感器是未来海水中氨的原位、在线检测的发展趋势之一。     

水下机器人光纤微缆动力学研究

讨论了水下机器人远程通信光纤微缆的动力学问题,研究分析了在海洋层流条件下水下机器人的运动对光纤微缆张力的影响,在仿真分析的基础上提出了对光纤微缆收放系统的设计要求并给出了概念设计方案。     

锯缘青蟹视神经节免疫细胞化学研究

采用兔抗哺乳类血清,应用链霉菌抗生物素蛋白-过氧化物酶免疫细胞化学技术,观察了锯缘青蟹视神经节中5羟色胺、胰高血糖素、神经肽Y和生长抑素免疫阳性细胞和神经纤维的形态和分布,结果发现,视神经节的4个神经髓均有5羟色胺免疫阳性细胞,除X器检出1个较大型阳性细胞外,其余均为小型细胞.视外髓、视内髓和视端髓都具有胰高血糖素免疫阳性细胞,视端髓的神经髓质阳性染色深,X器中阳性细胞成群分布,窦腺免疫阳性反应强.神经肽Y免疫阳性细胞在视神经层和视外髓为小型阳性细胞,在视内髓和视端髓检出较大型阳性细胞,另有小型阳性细胞散布于X器中.生长抑素免疫阳性细胞分布于4个神经髓,数量少.4种免疫阳性物的特异性分布模式,可为其不同的神经生理作用提供形态学证据.     

Measuring solar irradiance profiles in the Arctic sea ice using fiber optic spectrometry via inclined holes

An irradiance profile measurement approach and profiling system were developed to measure the solar irradiance profile of the Arctic sea ice using fiber optic spectrometry. The approach involved using a miniature spectrometer to sense light signals collected and transmitted from a fiber probe. The fiber probe was small, and could thus move freely in inclined bore holes drilled in sea ice with its optical entrance pointing upward. The input-output relationship of the system was analyzed and built. Influence factors that determined the system output were analyzed. A correctional system output approach was proposed to correct the influence of these factors, and to obtain the solar irradiance profile based on the measurements outputted by this system. The overall performance of the system was examined in two ice floes in the Arctic during the 9 th Chinese National Arctic Research Expedition. The measured solar irradiance profiles were in good agreement with those obtained using other commercially available oceanographic radiometers. The derived apparent optical properties of sea ice were comparable to those of similar sea ice measured by other optical instruments.     

The effect of gauge length on axially incident P‐waves measured using fibre optic distributed vibration sensing

Distributed vibration sensing, also known as distributed acoustic sensing, is a relatively new method for recording vertical seismic profile data using a fibre optic cable as the sensor. The signal obtained from such systems is a distributed measurement over a length of fibre referred to as the gauge length. In this paper, we show that gauge length selection is one of the most important acquisition parameters for a distributed vibration sensing survey. If the gauge length is too small, then the signal‐to‐noise ratio will be poor. If the gauge length is too large, resolution will be reduced and the shape of the wavelet will be distorted. The optimum gauge length, as derived here, is a function of the velocity and frequencies of the seismic waves being measured. If these attributes vary considerably over the depth of a survey, then the use of different gauge lengths is recommended. The significant increases in data quality resulting from the use of multiple gauge length values are demonstrated using field data.     

影像测量仪的光学成像误差分析及计算

对光学影像测量仪的光学成像误差,特别对摄像镜头的畸变误差进行了研究。运用标准模版标定法,计算出镜头成像的各项畸变参数,分析了畸变误差大小及其分布状况。应用畸变参数对测量结果进行校正,结果表明,径向畸变较大,切向畸变和薄棱镜畸变较小,且图像中心区域畸变很小,边缘畸变增大。在精密测量中需要考虑到畸变的影响,并对所测得的图像坐标进行修正。     

Immunocytochemical localization of neuropeptide Y, serotonin, substance P and β-endorphin in optic ganglia and brain of Metapenaeus ensis

1 INTRODUCTION Amines and peptides are important bioactive substance in crustaceans, and they function as hor- mones, neurotransmitters and neuromodulators. By far, bioactive substances that have been detected from nervous system of crustaceans include se…     

A Feasibility Study on the Application of Fiber-Optic Distributed Sensors for Strain Measurement in the Taiwan Strait Tunnel Project

Taiwan Strait Tunnel (TST) will be an extra-long tunnel or tunnel-bridge complex, running over 150?km of seafloor geologic body with complicated topographic and geologic units. It is therefore necessary to measure and monitor the strain distribution along the TST. In this article, the Brillouin optical time-domain reflectometer (BOTDR), a newly developed strain measurement and monitoring technology, is introduced, and the feasibility of its application in the strain monitoring for TST is analyzed through the monitoring achievement with BOTDR of a tunnel located in Nanjing City, China. The results indicate that the BOTDR has many unique merits such as distributed measurement, long-distance, real-time, and resistibility for strain monitoring application in a tunnel such as TST. Finally, apreliminary scheme for BOTDR application in TST monitoring is proposed.     

面向海洋传感与探测的光纤传感器研究进展

调研了近几年光纤传感器在海洋探测方面的研究进展,主要包括测量海水温度、压力、盐度、叶绿素、pH值和溶解氧的相关光纤传感器以及光纤水听器。简要介绍了光纤传感器的基本原理、结构及性能,同时跟踪了国内外相关的最新研究进展,并与传统的测量方法进行了比较,分析得出光纤传感器是对现有传统海洋探测器的重要补充,并在一些探测领域具有独特的优势。文章最后,探讨了光纤传感技术的未来发展趋势,认为在海洋温度、压力、叶绿素、水听器等领域可能会率先突破技术瓶颈并实现商用,同时提出了未来海洋光纤探测技术新的研究方向。     

光电复合缆绞车牵引系统力学分析

针对深海光电复合缆绞车牵引系统的复合缆和卷筒的设计缺乏理论依据的关键问题,根据光电复合缆的特性和大容量收放的特点,运用微积分和MATLAB仿真的方法对复合缆在双卷筒上的受力进行详细分析,得到牵引卷筒上复合缆力学模型,进而讨论了牵引卷筒上复合缆的张力衰减情况。最后,基于ANSYS软件对复合缆进行有限元分析验证缆绳应力变化。仿真结果证明,所建立的牵引卷筒上缆绳的力学模型符合条件,为大载荷绞车的牵引系统设计提供了理论依据,有一定的工程意义。