一种考虑强调的英语口语翻译模型

为了打破跨语言交际中的语言障碍,采用翻译系统实现该目的。传统翻译系统不能很容易地处理单词和强调级别之间关系。此外,由于所有组件都是单独训练的,没有进行联合优化。为此,提出一种基于序列到序列模型的处理连续强调级别的方法,并将机器翻译和强调翻译结合到一个单一的模型中,这大大简化了翻译过程,更容易进行联合优化。实验表明,提出的模型与现有方法相比,具有更好的性能,并且能够较好地满足实际需求。     

Towards robust grasping: An analysis of in-hand object motion with FBG optical fibers as force sensing technology

To enable or allow for advanced manipulation scenarios in the envisaged future in robotic manipulation, the introduction of tactile or force-sensing technology is essential. This work introduces a study on a novel integration of fiber sensing elements inside the fingers of robotics grippers that allow obtaining accurate interaction forces during object manipulation. The study focuses on in-hand object motion and analyzes the objects’ dynamic behaviors during grasping or contact phases. The proposed approach classifies the behavior of the gripper-object interaction in real-time by looking at the measured forces in the orthogonal direction of the gripper’s fingers after a filtering stage. The methodology is validated theoretically and evaluated with real experiments using objects presenting different shapes, sizes, and surface properties.     

Configuration of more than N DWDM channels with only one N × N cyclic-AWG-based wavelength routing device

A wavelength routing device based on only one N × N cyclic arrayed waveguide grating (AWG) having easy extended channels configuration is presented in this paper. It is easy to extend the dense wavelength division multiplexing (DWDM) channel configuration through this wavelength routing device. According to the cyclic wavelength of AWG, the wavelength routing devices are easy to configure more than N extended DWDM channels through cascading more proper tunable fiber Bragg gratings (FBGs). With only one 8 × 8 AWG, two different wavelength routing structures were built to evaluate static crosstalk and the bit-error-rate (BER). Three of the 16 inputted DWDM channels were demonstrated to verify that the proposed wavelength routing device, with only one 8 × 8 AWG, could configure extended DWDM channels without interfering with other channels. The results show that the wavelength routing device can produces a better performance and offers a cheaper way to extend the DWDM channel configuration for a dynamic network.     

基于HFC网智能小区的系统设计

信息技术在建筑行业的高速发展使得智能住宅和智能小区迅速崛起并成长为巨大的新兴产业,提出一个基于有线电视HFC网构建的数字智能小区系统,省去了综合布线的重复投资,该方案依托成熟的有线电视网技术,可实现智能小区建设所需的安全防范、管理自动化和信息自动化的功能。     

Fabry-Perot Temperature Sensor for Quasi-Distributed Measurement Utilizing OTDR

A quasi-distributed Fabry-Perot fiber optic temperature sensor array using optical time domain reflectometry （OTDR） technique is presented. The F-P sensor is made by two face to face single-mode optical fibers and their surfaces have been polished. Due to the low reflectivity of the fiber surfaces, the sensor is described as low Fresnel Fabry-Perot interferometer （FPI）. The working principle is analyzed using twobeam optical interference approximation. To measure the temperature, a certain temperature sensitive material is filled in the cavity. The slight changes of the reflective intensity which is induced by the refractive index of the material was caught by OTDR. The length of the cavity is obtained by monitoring the interference spectrum which is used for the setting of the sensor static characteristics within the quasi-linear range. Based on our design, a three point sensor array are fabricated and characterized. The experimental results show that with the temperature increasing from -30℃ to 80℃, the reflectivity increase in a good linear manner. The sensitivity was approximate 0.074 dB℃. For the low transmission loss, more sensors can be integrated.     

基于直接数字频率合成的远距离散射通信方法

远距离(LoRa)散射通信(BC)不仅成本低、功耗低,而且通信距离远。但现存散射方案的系统组成复杂,且无法应用于实际工程。为此该文提出一种新的LoRa散射通信方法,采用直接数字频率合成(DDS)技术产生频率线性变化的方波作为LoRa散射调制信号,并据此首次展示了基于MCU的LoRa散射通信系统原型样机。实验结果表明,该方法能够在相距208 m的基站和接收端之间的任意位置实现低功耗LoRa散射通信,且兼容现有的商用LoRa射频芯片组。此外,该方法还适用于专用集成电路(ASIC)设计,可使LoRa散射IC有更高的鲁棒性、更低的成本和功耗。     

Energy-saving scheduling for LTE multicast services

In the Long Term Evolution （LTE） downlink multicast scheduling, Base Station （BS） usually allocates transmit power equally among all Resource Blocks （RBs）, it may cause the waste of transmit power. To avoid it, this paper put forward a new algorithm for LTE multicast downlink scheduling called the Energy-saving based Inter-group Proportional Fair （EIPF）. The basic idea of EIPF is to calculate an appropriate transmitting power for each group according to its data rate respectively, and then follow the inter-group proportional fair principle to allocate RBs among multicast groups. The results of EIPF simulation show that the proposed algorithm not only can reduce the transmit power of BS effectively but also improve the utilization rate of energy.     

集成光学器件的无源光纤集成芯片耦合及组装

本文介绍和比较了两种集成光学器件的无源光纤集成芯片耦合及组装方法。一种是双芯片法,另一种是单芯片法,文中还介绍了这两种方法的制作工艺。     

2m长As-Se-Te玻璃红外光纤传像束

文中介绍了传输 2～ 12 μmAs Se Te玻璃红外光纤所用原料提纯和玻璃熔制工艺改进的方法。分析了损耗、填充系数K和面反射对透过率的影响。将制备出的红外玻璃光纤 ,用WQF 4 0 0傅里叶变换红外光纤光谱仪测试其损耗 ,光纤损耗值明显降低。把单丝直径 φ≤ 80 μm的As Se Te玻璃光纤制成 10 0像元× 10 0像元、长度为 2m的传像束。前、后两端分别配置可调焦的红外透镜 ,入端对准 5m处 4 0 0℃黑体炉 φ =3mm的小孔 ,出端与热像仪连接 ,经过光学扫描和信号处理后 ,在计算机屏幕上显示出圆形的黑体热像。结果表明 ,在特殊环境中用As Se Te玻璃红外传像束 ,传输热像是最佳设计方案之一。