公交车柴油机缸套耐磨寿命和可靠性研究

通过对柴油机缸径磨损量和相应行驶里程进行统计和分析建立回归方程 ,依此对柴油机缸体耐磨寿命和可靠性进行研究。     

面向应用领域的知识发现系统开发平台KDIST

介绍了一个面向应用领域的知识发现系统开发平台KDIST。将数据挖掘技术巧妙地封装在应用领域的问题中,使开发出的知识发现系统操作傻瓜化,用户无须关心数据挖掘本身,有效地减轻了领域用户使用负担,提高了数据挖掘技术实用性。所开发出的知识发现系统将挖掘得到的知识融合到已有专家系统的知识库中。两个实例系统的应用证明知识发现系统是专家系统自动半自动知识获取和知识库精化的良好工具。     

Modification of DLC films by Ni ions implantation

Enhanced diamond-like carbon (DLC) multilayer films were produced by a method of alternating the magnetic filtered vacuum cathode arc deposition and the metal vapor vacuum arc (MEVVA) implantation of Ni⁺ ions. The microstructure and mechanical properties of these multilayer films were studied by XPS, Raman, SEM, AFM, XRD, nano-intender and internal stress measurement. The results reveal that with the increasing dose of implanted Ni⁺ ions, the sp³ contents are declining and reduction of the nanohardness and release of the internal stress are observed.     

平整机电气控制系统的数据通讯

阐述Ｍｏｄｂｕｓ Ｐｌｕｓ网络在平整机组自动化控制系统上的,从硬件配置和软件程序设计两个方面说明ＰＬＣ控制系统、Ｌｏｇｉｄｙｎ－Ｄ系统、Ｉｎｔｏｕｃｈ系统在ＭＢ＋上数据通讯的实现方法,运行结果证明,ＭＢ＋是一种高速、高性能的局部网络。     

高相对分子质量双峰HDPE及其应用

综述了高相对分子质量高密度聚乙烯树脂的性能、生产技术、应用领域及发展趋势．指出双峰聚乙烯中高相对分子质量段赋予良好的强度、低相对分子质量段使树脂具有良好的加工性．是日前用途广泛、市场极有前景的一种通用树脂。同时,介绍了台湾塑胶工业股份有限公司在薄膜级及管材级双峰聚乙烯、中空吹塑级宽峰聚乙烯产品上的生产工艺及生产现状。     

Novel electrode design of three-dimensional carbon foam modified with MnO2 nanosheet arrays for high-performance quasi-solid supercapacitor

Journal of Materials Science: Materials in Electronics - In recent years, as a flexible electrode material, melamine foam has attracted more and more attention from researchers in the field of...     

基于Android的多用户位置共享及实时通信系统

为了给用户生活中实时交流、出行、集会等方面提供便利,本文针对移动互联网通信中多用户如何位置共享及实时通信的问题,详细阐述了一个性能较好、可行度较高的设计方案并给出了相关系统的具体开发和实现方法.本系统基于Android系统,采用了高德地图、网易云信的SDK和API及RSA加密技术,实现了多用户定位、导航、实时通信等功能并保证了交互过程的安全性,为其他有关地图或通信的Android系统设计提供了参考.     

Hot corrosion behavior of BaLa2Ti3O10 exposed to calcium-magnesium-alumina-silicate at elevated temperatures

Calcium-magnesium-alumina-silicate (CMAS) attack has been regarded as one of the significant failure mechanisms for thermal barrier coatings (TBCs). In this study, CMAS corrosion behavior of BaLa₂Ti₃O₁₀, a novel TBC material, is investigated at 1300?°C and 1350?°C for 0.5?h, 4?h, 12?h and 24?h. Results reveal that BaLa₂Ti₃O₁₀ has high resistance to molten CMAS infiltration, attributable to the formation of a dense reaction layer. X-ray diffraction, scanning electron microscope, energy dispersive spectroscope, transmission electron microscope confirm that the layer consists of apatite, celsian and perovskite phases. With increased corrosion duration, the layer retains good phase stability and the thickness increases. The formation of corrosion products and the reaction layer are discussed according to a dissolution-reprecipitation mechanism and the optical basicity theory.     

Seismic energy dispersion compensation by multi-scale morphology

Seismic energy decays while propagating subsurface, which may reduce the resolution of seismic data. This paper studies the method of seismic energy dispersion compensation which provides the basic principles for multi-scale morphology and the spectrum simulation method. These methods are applied in seismic energy compensation. First of all, the seismic data is decomposed into multiple scales and the effective frequency bandwidth is selectively broadened for some scales by using a spectrum simulation method. In this process, according to the amplitude spectrum of each scale, the best simulation range is selected to simulate the middle and low frequency components to ensure the authenticity of the simulation curve which is calculated by the median method, and the high frequency component is broadened. Finally, these scales are reconstructed with reasonable coefficients, and the compensated seismic data can be obtained. Examples are shown to illustrate the feasibility of the energy compensation method.