一种多维集成直觉模糊信息的信任评价方法

信任是保证在线服务质量的前提。针对电子商务环境存在的复杂性、模糊性和不确定性等因素,引入直觉模糊理论,提出了一种多维集成直觉模糊信息的信任评价方法,给出了两类信任反馈属性集成直觉模糊信息的方法,通过直觉模糊熵确定属性权重,并利用直觉加权算数平均算子求出实体的综合直觉模糊数,从而全面、客观和细腻地反映信任的模糊性和不确定性。计算实例和仿真实验表明,基于多维集成直觉模糊信息的信任评估方法是可行的,通过对风险偏好因子的灵敏度分析,发现服务请求者风险偏好不同,则评估的服务提供商的信任得分也不同;同时也验证了该方法可以有效地抑制恶意节点的攻击,为电子商务环境下信任评价的研究提供了新思路。     

基于6LoWPAN和ARM的校园无线传感网络设计

为了实现对校园多种传感信息的实时采集、处理和监控,以及对电器实现智能控制.本文采用TI公司的CC2530无线模块实现了无线传感网络的自定义组建与通信.客户端采用PC、iOS和Android三种实现,能够随时登陆查看相应信息,并远程控制电器.本方案解决了校园与互联网的信息无缝连接问题,具有广阔的应用前景.     

非均质算法在油藏数值模拟中的应用与研究

三维地质模型网格数据量庞大,直接应用于油藏模拟多有不便。为减轻CPU工作负荷,方便油藏数值模拟,需要对大数据量的数值模型进行粗化处理,旨在减少三维网格体数据量的同时,尽量保持储层原有的地质信息。由此引发我们对精细油藏描述中非均质算法的研究,这一研究对油藏数值模拟有着重要意义。     

Recurrent neural network technique for behavioral modeling of power amplifier with memory effects

A new technique for behavioral modeling of power amplifier (PA) with short‐ and long‐term memory effects is presented here using recurrent neural networks (RNNs). RNN can be trained directly with only the input–output data without having to know the internal details of the circuit. The trained models can reflect the behavior of nonlinear circuits. In our proposed technique, we extract slow‐changing signals from the inputs and outputs of the PA and use these signals as extra inputs of RNN model to effectively represent long‐term memory effects. The methodology using the proposed RNN for modeling short‐term and long‐term memory effects is discussed. Examples of behavioral modeling of PAs with short‐ and long‐term memory using both the existing dynamic neural networks and the proposed RNNs techniques are shown. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:289–298, 2015.     

Design of a novel static-triggered power-rail ESD clamp circuit in a 65-nm CMOS process基于65纳米CMOS工艺的静态触发型电源钳位ESD保护电路设计

This work presents the design of a novel static-triggered power-rail electrostatic discharge (ESD) clamp circuit. The superior transient-noise immunity of the static ESD detection mechanism over the transient one is firstly discussed. Based on the discussion, a novel power-rail ESD clamp circuit utilizing the static ESD detection mechanism is proposed. By skillfully incorporating a thyristor delay stage into the trigger circuit (TC), the proposed circuit achieves the best ESD-conduction behavior while consuming the lowest leakage current (I_leak) at the normal bias voltage among all investigated circuits in this work. In addition, the proposed circuit achieves an excellent false-triggering immunity against fast power-up pulses. All investigated circuits are fabricated in a 65-nm CMOS process. Performance superiorities of the proposed circuit are fully verified by both simulation and test results. Moreover, the proposed circuit offers an efficient on-chip ESD protection scheme considering the worst discharge case in the utilized process.     

熵权物元可拓模型在河流黑臭评价中的应用

考虑河流致黑致臭成因的模糊性和不确定性,以及干旱地区河流黑臭成因的复杂性,应用熵权赋权法确定各个评价指标的权重,建立基于熵权的物元可拓模型进行干旱地区河流黑臭评价。以具有代表性的丹河晋城河段为研究对象,设置赵庄、东焦河水库出口、高平河西、任庄水库、白水河5个监测断面,对其丰水期、平水期、枯水期水质进行现场监测,选取BOD、COD、NH3-N、Mn、DO、CH、Fe、P为评价指标进行河流黑臭评价。评价结果表明:模型预测结果与实际情况吻合较好,预测精度较高。     

赣北地区农村饮用水水源水质概况及水源地保护

通过调查南昌、九江、上饶3个地区的农村饮水安全工程的水源地,结果显示赣北地区农村饮用水水源水质良好,达到国家Ⅲ类水标准,但也存在地表水中总磷、细菌总数超标,地下水中Mn含量超标的情况.主要污染源来自农业面源污染、工矿企业生产活动及废水排放污染等.赣北地区农村饮用水水源地保护工作有待加强,需通过技术和管理两个层面来保护农村饮用水水源地.