利用寻线传感器的物流车设计

以制造装配类企业的车间物流、大型仓储物流和港口码头物流方式的柔性化为基础,基于物流车的智能化控制要求,对小型车间引导物流车进行研究和设计,介绍物流车的总体结构、运动过程及控制系统。该物流车以Arduino MEGA1280为主控制器,在车间环境中能按指定轨道寻线行走,实现车辆的行走、物件抓放、升降、旋转和伸缩等功能,可自动搬运工件,定位准确,操作灵敏,从而提高了车间物流方式的智能化、柔性化,有利于提高劳动生产率。     

L-Phe印迹P(AN-co-AA)纤维的制备与性能研究

以丙烯腈聚合物为载体,以印迹分子L-Phe纤维为研究对象,采用气流静电纺丝方法制备出具有L-Phe印迹性能的P(AN-co-AA)超细纤维,通过对该纤维在不同pH值溶液中的印迹性能研究,得到了最佳制备工艺参数,成功制备出了L-Phe印迹纤维。     

智能封堵器水上通信中单片机系统电路的设计

为了实现封堵器海洋工作环境中的无线遥控动作,封堵器在海底工作中采用了水声通信技术.文章首先介绍了水声通信系统的整体设计.在前期工作中,从影响水声通信的因素出发,对水声通讯频率的选择及水声换能器的选型进行了研究,确定了水声通讯的载波频率.在此基础上提出了基于单片机的水声Modem的制作方案,设计了单片机系统电路.并对单片...     

真空碳酸盐法焦炉煤气脱硫工艺优化

根据焦化厂脱硫现状,对脱硫系统及相关工序的工艺流程进行优化,对相关设备进行改造,使脱硫工序的开工率大幅度提高,硫产量得到大幅度提升。     

A RF receiver frontend for SC-UWB in a 0.18-μm CMOS process

正A radio frequency(RF) receiver frontend for single-carrier ultra-wideband(SC-UWB) is presented. The front end employs direct-conversion architecture,and consists of a differential low noise amplifier(LNA),a quadrature mixer,and two intermediate frequency(IF) amplifiers.The proposed LNA employs source inductively degenerated topology.First,the expression of input impedance matching bandwidth in terms of gate-source capacitance, resonant frequency and target S_(11) is given.Then,a noise figure optimization strategy under gain and power constraints is proposed,with consideration of the integrated gate inductor,the bond-wire inductance,and its variation.The LNA utilizes two stages with different resonant frequencies to acquire flat gain over the 7.1-8.1 GHz frequency band,and has two gain modes to obtain a higher receiver dynamic range.The mixer uses a double balanced Gilbert structure.The front end is fabricated in a TSMC 0.18-/im RF CMOS process and occupies an area of 1.43 mm~2.In high and low gain modes,the measured maximum conversion gain are 42 dB and 22 dB,input 1 dB compression points are -40 dBm and -20 dBm,and S_(11) is better than -18 dB and -14.5 dB.The 3 dB IF bandwidth is more than 500 MHz.The double sideband noise figure is 4.7 dB in high gain mode.The total power consumption is 65 mW from a 1.8 V supply.     

A multi-mode multi-band RF receiver front-end for a TD-SCDMA/LTE/LTE-advanced in 0.18-μm CMOS process

正A fully integrated multi-mode multi-band directed-conversion radio frequency(RF) receiver front-end for a TD-SCDMA/LTE/LTE-advanced is presented.The front-end employs direct-conversion design,and consists of two differential tunable low noise amplifiers(LNA),a quadrature mixer,and two intermediate frequency(IF) amplifiers.The two independent tunable LNAs are used to cover all the four frequency bands,achieving sufficient low noise and high gain performance with low power consumption.Switched capacitor arrays perform a resonant frequency point calibration for the LNAs.The two LNAs are combined at the driver stage of the mixer,which employs a folded double balanced Gilbert structure,and utilizes PMOS transistors as local oscillator(LO) switches to reduce flicker noise.The front-end has three gain modes to obtain a higher dynamic range.Frequency band selection and mode of configuration is realized by an on-chip serial peripheral interface(SPI) module.The frontend is fabricated in a TSMC 0.18-μm RF CMOS process and occupies an area of 1.3 mm~2.The measured doublesideband (DSB) noise figure is below 3.5 dB and the conversion gain is over 43 dB at all of the frequency bands. The total current consumption is 31 mA from a 1.8-V supply.     

节材节能的模锻工艺——小飞边模锻

一般的闭式锻造要求下料精度很高,限制了它的应用范围。为了克服上述缺陷,作者通过选用合适的毛坯尺寸、设计了混合型飞边槽、又针对环类锻件设计,带有自动开启的飞边槽的结来实现小飞边模锻。小飞边模锻节材20％以上,模具寿命几乎提高一倍。     

食品中杏仁过敏原成分的检测

目的：建立检测食品中桃仁、杏仁过敏原成分的荧光PCR 方法,比较国外3 种ELISA 试剂盒效果。方法：针对杏仁Pru du1 基因设计引物及探针,建立荧光PCR 方法。利用杏仁过敏原参考物质对3 个品牌的ELISA试剂盒的回收率进行比较。结果：建立的荧光PCR 方法,具有很好的特异性;灵敏度为10mg/kg。结论：桃仁及杏仁过敏原成分荧光PCR 检测方法特异性好、灵敏度高,对食品中过敏原的检测有重要的实际意义。     

濮城油田沙二下储层沉积特征研究

依据地层沉积原理,把濮城油田的储层细分为七个层。其中沙二下亚段,主要由水下河道砂体、前缘席状和远砂坝砂体三种成因砂体组成,水下河道砂体是主要的储层砂体,但其层内非均质性变化较大。成因砂体在纵向和平面上的分布控制了储层在面上的平面非均质性,耐剩余油的分布取决于储层的层间和平面非均质状况。     

软构件技术与CORBA结合开发ERP系统

针对大型分布式信息系统异构环境下存在的互操作和复用问题,利用ＣＯＲＢ Ａ标准和软件构件技术,提出了将软构件与中间件技术相结合的开发策略．采用软构件技术开发的构件具有易移植、可复用性,同时由于ＣＯＲＢ Ａ对异构环境下对象间互操作的支持,可以证明该系统具有良好的可扩展性和灵活性．