基于抗体或核酸适配体作为识别元件的生物传感器,可将样品中目标物与识别元件之间发生特异性识别反应产生的生物信号转换成与浓度相关的电信号或光信号,具有特异性强、所需仪器简单、操作方便和分析快速等优良特点,目前已广泛应用于临床诊断、环境分析等多个领域,可对疾病标记物、有毒有害物质以及生物分子进行分析检测.尽管此类与疾病标记物及毒品毒素相关的生物传感器可以实现特异性检测,但目前仍存在信号放大方式单一的问题,灵敏度仍然有待提高.项目针对应用于实际复杂体系检测的生物传感器面临的制备繁琐、酶标记物易失活、灵敏度及选择性
We propose and demonstrate the generation of wideband chaos based on a dual-mode microsquare semiconductor laser with optical feedback.By adjusting the dual-mode intensity ratio and the feedback strength,wideband chaos covering more than 50 GHz in the RF
Optical fibers have been widely applied to telecommunication,imaging,lasers,and sensing.Among the different types of fibers,photonic crystal fibers[PCFs],also called microstructured optical fibers,characterized by air holes arranged along the length of fi
This paper presents a polarization descattering imaging method for underwater detection in which the targets have non-uniform polarization characteristics.The core of this method takes the nonuniform distribution of the polarization infor-mation of the ta
We demonstrate a high-resolution frequency-modulated continuous-wave dual-frequency LIDAR system based on a mono-lithic integrated two-section[TS]distributed feedback[DFB]laser.In order to achieve phase locking of the two lasers in the TS-DFB laser,the si
电动叉车作为工业搬运车辆中的典型代表,普遍运用在沿海港口、大型车站、生产车间、仓库以及物流中心等地点,电动叉车与其他普通车辆不同,一是自身质量大,二是工作时负载变化十分频繁,多驱动叉车也随之产生.在转向过程中,若车速过高,由于侧向力的作用容易发生侧翻或侧滑事故;若车速过低,则会延长搬运时间,不利于输送的经济性.在操作空间比较狭小,需要频繁转向搬运货物的工作环境下,电动叉车经常发生安全事故.因此必须确保电动叉车运行时整车横摆与侧偏的平稳性,这是电动叉车电驱动和转向系统控制的关键问题之一.
A new phase unwrapping method based on dual-frequency fringe is proposed to improve both high accuracy and large measurement range of three-dimensional shape measurement by synthesizing the projected dual-frequency fringes obtaining higher and lower frequ
In this paper,we demonstrate a scheme to tailor both longitudinal and transverse modes inside a laser cavity and constitute an eye-safe single longitudinal mode Er ∶Y3Al5O12[Er∶YAG]vector laser.A q-plate is employed as a spin-orbital conversion element to
Photonic nanojets[PNJs]are subwavelength jet-like propagating waves generated by illuminating a dielectric microstruc-ture with an electromagnetic wave,conventionally a linearly polarized plane wave.Here,we study the donut-like PNJ produced when a circula
Two-dimensional[2D]perovskites exhibit broadband emission due to strong exciton-phonon coupling-induced self-trapped excitons and thus would find important applications in the field of white-light emitting devices.However,the available identifying methods