智能化装载机载重检测设计

通过对装载机作业时的转矩进行分析,适当简化相关参数,建立起一个基本的动力学模型.根据这个模型,采用单片机80C196KB,设计了装载机载重量检测的实现方案.根据装载机故障信息的自身特点,基于GSM(global standard for mobile communications)模块TC35,实现装载机与远程控制中心之间的双向无线通讯.最后给出相关的软件设计,主要分析了其中几段关键的程序流程.通过上述软硬件的设计,本方案实现了对装载机载重量的实时检测,并对过载等故障信息进行处理.由此显著地提高了装载机的可靠性和稳定性.     

参数化的网络状况监控

网络管理的前提是要对网络状况有清楚地认识 ,因此对网络状况的正确评价可以有效地提高网络管理水平 .在利用netflow进行数据采集的基础上 ,为网络的各类状态定义了参数系统 ,并依此为基准来衡量实时网络状况 ,并在此基础上定义了若干指示器为网络异常提供预警     

辽河盆地东部凹陷北部地区Es1+2/Es3不整合面与油气运聚的关系

根据 2 2 4口井的实际资料 ,结合地层沉积特征和地震剖面解释结果对辽河盆地东部凹陷北部地区Es1+ 2 /Es3 不整合面的上、下地层的接触关系及岩性组合特征进行了平面规划及分类 ,探讨了该不整合面与油气运聚的关系。研究结果表明 ,不整合面在油气运聚过程中所起的作用主要是由不整合面上、下地层的接触关系及岩性配置所决定。研究区凹陷北部茨 5 9井—茨 80井、龙 12井—龙 2 4井等区域为寻找不整合面之下遮挡油气藏的有利地区 ,茨 6 7—茨 6 15区域是该不整合面之上油气聚集的有利区     

Design Optimization of Charger Based on PSPICE Simulation

The design of a high-frequency switching mode charger (HFSMC) was optimized using a PSPICE simulation of the charging system including a valve regulated lead-acid (VRLA) battery pack and the HFSMC.A high-frequency battery charging circuit model was developed to describe the battery dynamics when charging with DC current having high-frequency ripples. An IGBT circuit model, a high-frequency pulsed transformer coupling model and a silicon fast recovery diode model were also developed. Simulations were compared to laboratory measurements to verify the battery and system models. Simulation of the working states of an Fe-based nanocrystalline magnetic core used in the transformer shows that the transformer design can be optimized by adjusting the core gap and by employing an RC network. Further simulations show that the components in the output unit of the charger main circuit can also be optimized. Simulations also show that the battery dynamics Including the inductance should be considered for design optimization of the HFSMC.     

关于白盒测试基本方法的分析

对软件白盒测试的基本方法进行分析,计算机程序有顺序、选择、循环3种基本结构。根据3种基本结构的组合方式,程序又可以分为基本结构、嵌套结构和连锁结构。对于嵌套结构程序,可以使用基本路径测试法进行测试,对于连锁选择结构,可以抽取部分路径进行测试;对于连锁循环结构,则需根据循环是否独立来确定具体测试方法。     

Present-Day crustal deformation field in China continent inverted from GPS observations, earthquake moment tensor and quaternary fault slip rates

Based on the bi-cubic Bessel spline function method, we have inverted the present-day crustal horizontal velocity field and deformation field in China continent by combining with 410 GPS observations, 327 seismic moment tensors of earthquakes and fault slip rates in China and its neighboring areas, and considered the geological and geophysical parameters at the same time. The results reveal that the crustal movement mostly takes on compression in SN-NE direction and extension in EW-NW direction in China continent. The continent is rotating southeast and takes on a clockwise rotation image from the west to the east, particularly in the southeast of Tibet and Chuan-dian area. Different blocks have different deformation in China continent. The south China, Ordos and Northeast block have good integrity.The deformation in the western part of China is obviously stronger than that in the eastern part. The strong strains are focused on the Himalaya, east Tibet,west Tian Shan and Chuandian block etc. The deformation at the joint of blocks is stronger than that within the blocks. The China continent deformation not only has the strike-slip faulting and extrusion feature but also has the crustal shortening and thickening feature.     

Loess-soil sequences in southern Anhui Province： Magnetostratigraphy and paleoclimatic significance

Two parallel loess-soil sequences from Xuancheng and Fanchang in southern Anhui Provinces are dated using geomagnetic and luminescence methods.The Brunhes/Matuyama(B/M) reversal boundary is recognized within the lower part of the so-calles Vermiculated Red Soil (VRS) in the Xuancheng section while the entire Fanchang sequence is of Brunhes age.This indicated that the most recent VRS in southern China,a stratigraphic marker and an indication of extremely warm-humid conditions,was formed during the middle Pleistocene,chronologically correlative with the S4 and S5 soil units in northern China.Microscopic and sedimentologic in vestigations reveal that eolian deposition started in this region at about 0.85 MaBp,roughly synchronous with the well-known Mid-Pleistocene climate change of global significance.The strengthening of both summer and winter monsoon circulations and the consequent river hydrological changes at that time would have provided favorable conditions for sustained eolian deposition in the middle-lower reaches of the Yangtze River since 0.85 MaBP.     

DNA分子标记在果树上的应用

介绍了在果树上常用的DNA分子标记的原理和特点，并对其在果树的分子遗传图谱和指纹图谱的构建，品种鉴别、系谱分析和分类，基因定位与分子标记辅助选择等方面的应用进行了综述。     

轿车制动效能试验数据的回归分析与仿真

针对国产轿车道路试验中的工况控制、试验结果比较以及试验与仿真的对比等问题 ,提出了在制动效能分析中采用试验实测数据回归分析 ,并利用整车简化模型进行仿真估算的方法 ,并依此分析了原车安装防抱死制动系统后的制动效果 .该方法可为国产化轿车安装防抱死制动系统提供一种简易的分析方法     

均匀设计法优化巴旦杏仁油的超声提取工艺

用均匀设计法考察了超声频率、超声时间和溶剂的用量对巴旦杏仁油提取率的影响，得到巴旦杏仁油超声提取的优化工艺条件。与常规的提取法相比，超声提取具有提取时间短、收率高、无需加热的特点。