JMAWR: joint optimization of monitoring trail allocation and wavelength routing with limited monitoring resources

In all-optical networks, monitoring trail (m-trail) has long been proposed as an effective way for link failure localization. Previous works tried to minimize the number of used m-trails for localizing network-wide single link failures, and they all supposed that the monitoring resources were enough. However, failures are rare events and the traffic demand is increasing rapidly. The dedicated wavelengths for m-trails cannot be used to transmit data traffic, and some traffic demand may not be served during the peak period. Considering the operators prefer to serve customers’ demand as much as possible, if the resources allocated for m-trails are limited, more traffic will be carried. In this paper, we focus on the scenario where there are not enough resources for allocating m-trails. In this scenario, as only part of single link failures can be unambiguously localized, we aim to monitor the most valuable links, which carry more traffic demand, and minimize the maximum number of used wavelengths for traffic demand on the links which cannot be unambiguously localized. As we can also control the wavelength routing for traffic demand, we try to jointly optimize the m-trail allocation and wavelength routing. We first formulate this joint optimization problem as a mathematical model and present concrete analyses on this model. According to these analyses, a joint m-trail allocation and wavelength routing (JMAWR) heuristic algorithm is proposed based on graph-constrained group testing. Simulation results show that JMAWR outperforms the state-of-the-art m-trail allocation algorithm by up to 88.46% improvement in terms of maximum number of used wavelengths for traffic demand on links which cannot be unambiguously localized.     

One-Component Artificial Gustatory System Based on Hydrogen-Bond Organic Framework for Discrimination of Versatile Analytes

Hydrogen-bond organic frameworks (HOFs) with excellent structural and luminescent properties have emerged as a promising material for the construction of fluorescence sensors. However, designing a facile, universal and high throughput sensor with multiplex detection capacity still remains challenging. Herein, a one-component sensor array is constructed that mimics natural gustatory system for accurate and high-throughput discrimination and identification of versatile analytes. HOF as a single sensing element greatly simplifies the probe preparation in sensor array and detection procedure. Metal ions, proteins and bacteria as the model targets are rapid and accurately discriminated, presenting the universality of the system. Particularly, the system is successfully used for the classification of antibiotic mechanisms. The study expands the application scope of HOFs and provides a facile and universal system for sensing applications.     

AND:Rubrene发光层的有机电致白光器件

利用9,10-bis(2-naphthyl) anthracene(AND)掺杂rubrene作为器件单一发光层,研制成功单层白光器件。器件在电流密度为140mA/cm2时,电流效率达到5.93cd/A;当电压为21V时,该器件达到最高亮度9300cd/m2。器件发光色坐标为(0.32,0.40),且随着电压的变化发光色度始终处于白光区。这种器件的白色发射是来源于AND(蓝色发射)和rubrene(橙色发散)的混合发射。与此同时,AND和rubrene二者之间会发生Frster能量传递。     

用TL16C550C芯片实现DSP与PC机的串行通信

采用TI公司的通用异步接收发送设备(UART)芯片完成数字信号处理器(DSP)与PC机之间的串行通信,可以避免常规的对DSP的多通道缓冲串口(MCBSP)复杂的软件编程模拟,不仅编程简单,传输能力强,而且实时性好,可靠性高.文中简单介绍了一种UART芯片TL16C550C,并给出了它与TMS320VC5402连接的硬件电路以及软件编程方法.     

基于网格的电信计费系统构架的研究

电信计费是电信运营商的核心业务,传统的电信计费系统存在诸多问题,对此,本文讨论了网格技术在电信计费中的应用研究现状,分析了研究的必要性,提出了一个基于网格的电信计费构架,对构架各层功能进行了论述,最后对构架的优点进行了总结,能够为解决电信计费存在的问题提供新的方法.     

呼伦贝尔市双向HFC网络系统实现方案

在充分利用呼伦贝尔市广电网络分公司原有HFC网络设备的基础上增加回传功能模块，实现HFC网络双向传输功能。在HFC网上建立基于DOCSIS2．0的CM数据传输系统，实现HFC网络中视频、语音、数据等业务的融合。重点阐述CM系统中数据和语音业务的实现过程，包括物理链路的建立、媒质访问控制子层（MAC）的建立及传输汇聚子层（TC）的建立。     

EMS: Efficient mobile sink scheduling in wireless sensor networks

Sink scheduling, in the form of scheduling multiple sinks among the available sink sites to relieve the level of traffic burden, is shown to be a promising scheme in wireless sensor networks (WSNs). However, the problem of maximizing the network lifetime via sink scheduling remains quite a challenge since routing issues are tightly coupled. Previous approaches on this topic either suffer from poor performance due to a lack of joint considerations, or are based on relaxed constraints. Therefore, in this paper, we aim to fill in the research blanks. First, we develop a novel notation Placement Pattern (PP) to bound time-varying routes with the placement of sinks. This bounding technique transforms the problem from time domain into pattern domain, and thus, significantly decreases the problem complexity. Then, we formulate this optimization in a pattern-based way and create an efficient Column Generation (CG) based approach to solve it. Simulations not only demonstrate the efficiency of the proposed algorithm but also substantiate the importance of sink mobility for energy-constrained WSNs.     

CMOS compatible dual metal gate integration with successful Vth adjustment on high-k HfTaON by high-temperature metal intermixing

In this paper, we report for the first time a novel dual metal gate (MG) integration process for gate-first CMOS platform by utilizing the intermixing (InM) of laminated ultra-thin metal layers during high-temperature annealing at 1000 °C. In this process, an ultra-thin (2 nm) TaN film is first deposited on gate dielectric as a buffer layer. Preferable laminated metal stacks for NMOS and PMOS are then formed on a same wafer through a selective wet-etching process in which the gate dielectric is protected by the TaN buffer layer. Dual work function for CMOS can finally be achieved by the intermixing of the laminated metal films during the S/D activation annealing. To demonstrate this process, prototype metal stacks of TaN/Tb/TaN (NMOS) and TaN/Ti/HfN (PMOS) has been integrated on a single wafer, with WF of 4.15 and 4.72 eV achieved, respectively. Threshold voltage (V_th) adjustment and transistor characteristics on high-k HfTaON dielectric are also studied.     

基于神经网络的油罐故障诊断系统的设计

针对加油站油罐故障难以判断的问题,提出了油罐故障诊断系统的研究方案,运用神经网络的方法,建立了油罐故障诊断系统模型,解决了油罐故障实时诊断的问题。     

含B闪锌矿三元系半导体BxIn1-xP和BxGa1-xP带隙理论预测

利用第一性原理计算方法,用广义梯度近似 (GGA) 处理电子之间的交换关联能,计算了BxIn1-xP,BxGa1-xP的带隙结构.BxIn1-xP的带隙弯曲参数b _Eg (Γ)=4.32eV,b_Eg(X) =1.8eV,它从直接带隙转变为间接带隙时B的含量为0.47;在小量B的掺入下,可使BxIn1-xP的带隙变小,在x=0.15时带隙达到最小值1.33eV.BxGa1-xP的带隙弯曲参数b_Eg(Γ)=1.37eV,b _Eg(X)=2.46eV,在整个组分内是间接带隙.BxIn1-x-P,BxGa1-xP有较大的带隙弯曲参数,是由于组成它们的二元系之间存在较大的晶格失配.