直流系统绝缘监测装置的设计和应用

利用磁调制原理构成直流电流传感器 ,并由此设计了直流绝缘在线检测装置。本装置与直流系统完全独立 ,不影响直流系统正常工作且直流电流传感器结构简单、分辨率高。由于采用固定偏差设计 ,实时检测偏差基准 ,提高了装置的抗干扰能力。该装置适用于发电厂与变电站直流系统绝缘的在线检测     

Proposed high speed packet switch for broadband integrated networks

The design of a high speed, broadband packet switch with two priority levels for application in integrated voice/data networks is presented. The packet switch can efficiently cope with 128 byte packets converging on it from eight 140 Mbit/s dynamic time division multiplexed fibre optic links. The packet switch throughput varies with the load and traffic composition, and the delay experienced by voice and data packets is within 300 μs and 3 ms, respectively. The design is implemented by task-sharing in a multi-processor configuration. The design of the packet switch, including its subsystems, is detailed here.     

宽带数字接收机IQ不平衡估计与自适应补偿算法

针对宽带调制解调技术中广泛存在的IQ不平衡问题,在IQ不平衡模型及补偿原理的分析基础上提出了一种宽带数字接收机IQ不平衡估计与自适应补偿算法。首先利用解调数据对IQ不平衡参数进行实时估计,然后利用估计参数对接收信号进行自适应补偿。实验结果表明,所提算法可以有效解决宽带调制解调系统中普遍存在的IQ不平衡问题,提升系统误码性能。     

关于逻辑程序不动点语义的讨论

主要讨论逻辑程序中的最大不动点语义．证明了当Herbrand解释语义映射TP是保滤子交的,或者确定性程序中不含函数符号,或者它的每一个子句都满足：子句体的变量都在子句头中出现时,集合TP↓ω就是语义映射TP的最大不动点．然后定义了另一个Herbrand解释语义映射Fp将关于逻辑程序不动点语义的一些主要结论进行了推广．     

插齿刀尺寸检测方法分析

分析了插齿刀设计与制造工艺的关系,讨论了插齿刀齿形的磨削和检验方法,提出了“固定显示读数法”和“双截面法”来保证插齿刀尺寸精度的两种方法,并对两种方法的特点及适用范围进行了探讨     

A hybrid algorithm for reengineering the refractive index profile of inhomogeneous coatings from optical in-situ broadband monitoring data

1Introduction Inhomogeneouscoatingswithawell defined continuousrefractiveindexprofilealonganaxis thatisperpendiculartothefilmsurface,suchas so calledgradientindexlayersandrugatefilters representnewandprospectivethinfilmdesigns.Particularly,thelowopticalscatterlevelandthe wideaccessibleangularrangemakethemsuperi ortotraditionalstackswithrespecttoselected applicationssuchasnotchfilteroromnidirec tionaldevices[1].Manufacturingsuchsystemsin practicerequiresnewsynthesis,adapteddeposi tionprocessesa…     

固定球阀密封比压分析

通过有限元计算分析软件COSMOSWORKS,结合三维实体建模软件SOLIDWORKS,分析了固定球阀密封面上密封比压的分布规律,并且比较了理论值与有限元计算值之间的异同。     

用于CO2捕集的新型酒石酸钠交联海藻酸钠膜的制备（英文）

The membrane-based CO2 separation process has an advantage compared to traditional CO2 separation technologies. The membrane is the key of the membrane separation process. In this paper, preparation, characteriza-tion and laboratory testing of the membrane, which was prepared from sodium alginate, hydrogen bond cross-linked with sodium tartrate and used for CO2/N2 separation, were reported. The resistance to SO2 of the membrane was also investigated. The experimental results demonstrate that the membrane possesses a high resistance to SO2. Finally, based on experimental results, the economic feasibility of the membrane used for CO2/N2 separation was evaluated, indicating the two-stage membrane process can compete with the traditional chemical absorption method.     

生物质热解炭化反应设备研究进展

生物质热解炭化技术作为生物质能源开发利用的一种重要途径,已经得到国内外广泛关注。文章介绍了生物质热解炭化反应设备的两大类型,即窑式炭化炉和固定床式热解炉。详细论述了各种典型设备的结构特点和适用范围,认为与窑式炭化炉相比,固定床式热解炭化炉炭化周期短、对生物质原料适应性和可操作性更强、产炭品质更有保障。最后指出了高效、稳定、机械化是生物质热解炭化设备未来的研究和发展方向。     

Banach空间变系数的一阶非线性微分方程的正周期解

讨论了Banach空间E中变系数的一阶非线性常微分方程u'(t)+a(t)u(t)=f(t,u(t)), t∈R正ω-周期解的存在性,其中a(t)∈C(R,(0,+∞)), f:R×P→P连续, P为E中的正元锥.利用凝聚映射的不动点指数理论获得了该问题正ω-周期解的存在性,所得结果改进和推广了文献[5-8]中的相关结论.