REST API技术及在移动通信网络管理中的应用

介绍了目前最炙手可热的REST架构风格，该风格顺应Web2.0的兴起，完美的匹配了云计算时代来临的可扩展要求，在各种应用场景中都得到了充分的表现。根据其技术特点，分析了该风格的API在移动通信网络管理中的应用，从网管系统内部、网管系统之间以及网管系统与上层APP应用之间等多方面对是否适用于REST风格以及如何在合适的位置使用REST API进行了分析。     

电力巡检信息管理系统

简述了电力巡检信息管理系统的适用范围和作用,分析了该系统的基本原理,对手持式巡检仪进行了介绍,研究了该信息管理系统中的计算机软件系统,得出了该系统可靠性高、使用方便的结论。     

大型储油罐变形数据处理与分析

通过对某油库大型储油罐的观测实例,介绍了TM30在油罐测量的原理,并分析了确定圆心坐标的方法的精度,选取MATLAB进行程序设计对油罐的变形数据进行自动化处理,得出一系列几何参数,该方法明显提高了工作效率. 通过这些几何参数来分析该储油罐几何形体的形变情况,为人员生命安全和安全生产提供了依据.     

基于“PFC＋LLC＋CV、CC”拓扑结构的HB-LED驱动电源设计

为提高HB-LED驱动电源的效率和功率因数,设计了基于＂PFC＋LLC＋CV、CC＂拓扑结构的HB-LED（150W）驱动电源,即采用TM模式PFC控制器L6563H与高压谐振控制器L6599组成LLC半桥谐振电路,可实现在全电压范围及全负载条件下主功率管的零电压开关（ZVS）和整流二极管的零电流开关（ZCS）控制,并由LM358放大器与TL431组成恒压（CV）、恒流（CC）控制电路。功率因数达到97%,整机效率92%以上。     

一种基于MSP430单片机的语音系统研究

介绍了TI公司的MSP430单片机和DVSI公司的AMBE-2000TM声码器芯片的基本原理及其实际应用;并结合PCM芯片AD73311实现了一套全双工的语音系统。由单片机控制的全双工声码器可以进行语音数据压缩和解压,并且能在低数据速率下提供优良的语音质量,因此在卫星通信、移动通信或是保密通信中拥有广泛的应用。     

Terahertz Wave Polarization Beam Splitter Using Asymmetrical Coupler

This study has proposed and numerically demonstrated a compact terahertz wave polarization beam splitter. The splitter is built by using a asymmetrical directional coupler consisting of a bend waveguide and a slot bend waveguides and achieves a high extinction ratio of 24.88 dB and 16.55 dB for cross and through ports. The optimal coupling region length is found to be 26 μm. By using such a polarization beam splitter, the size of the terahertz wave system could be reduced significantly. The simulation results show that the designed polarization beam splitter can split TEand TM-polarized terahertz wave into different propagation directions with high efficiency over the terahertz wave frequency range from 9.40 THz to 9.65 THz. The device obtained is readily used for a polarization diversity terahertz wave integrated circuit field, particularly for platforms with slot waveguide.     

1.31μm InGaAsP/InGaAlAs TM偏振高速激光器的优化设计

报道了一种以InGaAsP(阱)/InGaAlAs(垒)量子阱为有源区的1.31μmTM偏振高速激光器。以1%张应变的In_(0.49)Ga_(0.51)As_(0.79)P_(0.21)作为阱层,0.5%压应变的InGaAlAs作为垒层,计算了由不同势垒带隙(1.309、1.232、1.177、1.136、1.040 eV)构成的五种多量子阱的发光特性,和由其构成的激光器的器件特性。数值模拟分析表明,采用适度小的势垒带隙,既能将载流子有效限制在有源区,又可以得到载流子在量子阱间的均匀分布,从而改善量子阱的发光特性和激光器的性能参数。该仿真对研制低阈值电流、高特征温度和大调制带宽的InGaAsP/InGaAlAs应变补偿量子阱激光器具有指导意义。     

The evaluation of the effects of control factors on surface roughness in the drilling of Waspaloy superalloy

In this study, the effects of cutting tool type (Ct), cutting speed (Vc), feed rate (f) and drill bit angle (A) on the average surface roughness (Ra) were investigated in the drilling of Waspaloy superalloy with coated and uncoated solid carbide drills. Experimental studies were performed in the orthogonal array of L18 (2¹ × 3³) by using Taguchi method. A second order predictive equation was developed with Linear Regression Analysis and coefficient of correlation for Ra calculated as R² = 96.9%. The most effective parameters on Ra were determined as A, f, Vc and Ct with 49.44%, 15.0%, 14.45% and 13.47% contribution ratios, respectively. Ra surface roughness values increased with the increasing tool wear. In this study, the chip formation and tool wear were also evaluated. Three types chip formation such as spiral chip, string chip and short chip were observed in the drilling of Waspaloy with solid carbide drills.     

Evaluating Land Surface Changes of Makassar City Using DInSAR and Landsat Thematic Mapper Images

Urban growth has been a major issue in environmental monitoring and changes occurred on land surfaces have been monitored by applying remote sensing as well as ground measurement. Most major cities in the world have experienced land subsidence phenomena on some parts of them due to the load of development and modernization. Excessive extraction of groundwater for the needs of industry has led to the condition where the water table drops, and this can possibly trigger subsidence, as observed in Indonesian cities. In this study the authors have shown that the application of DInSAR （differential interferometric synthetic aperture radar） technique using Japanese Earth Resources Satellite-I Synthetic Aperture Radar JERS-I SAR data can reveal subsidence conditions in the studied Makassar city area. Landsat TM （thematic mapper） images were used to evaluate the change of land cover during the observation period of 1994-1999. Makassar is fiat, covered mainly by alluvium deposit that is vulnerable to the load of constructions, and volcanic formations which is porous and will easily be degraded by groundwater extraction. It is found that mostly the subsidence has occurred in the western part of the city, including the industrial district, reclamation area, trading center area and the seaport area. The ground survey has indicated that high human activity exists in every point of subsidence. It is likely that various human activities such as ground water pumping and construction work should have affected the local subsidence phenomena in Makassar, as in the case of other large-scale cities in Indonesia.     

钢结硬质合金烧结中的金属挥发问题研究

基于生产实践,针对钢结硬质合金生产过程中的金属挥发问题进行研究,明确了TM52钢结硬质合金真空烧结过程中Mn为主要挥发元素,指出Mn元素大量流失是造成产品脱碳、异常断裂等的原因之一。对减少Mn元素的挥发提出了适合生产实践的解决方案,通过降低烧结温度、缩短保温时间,降低锰元素熔点附近的升温速度,降低最高烧结温度时的真空度等减少Mn元素挥发。