五种桉木制浆性能的比较

对5种桉木进行了原料分析，同时在用碱量(Na2O)17％、硫化度25％、液比1：4、升温时间2h、保温2h、最高温度170℃的优化工艺条件下进行了蒸煮实验，进而对其综合制浆性能进行了比较。     

一个网管中心网站接入子系统的设计与实现

网站接入子系统在网管中心的作用是用于接受来自各类用户的请求,并通过相应的功能模块,完成用户与主机的交互。讨论了网管中心网站接入子系统的设计与实现方法。在设计中,对不同类型用户接入提供相应的、无实时物理连接的功能模块以提高系统安全性,并使用消息中间件技术提高数据的传输效率以及优化应用程序的运行。     

燃料电池电动汽车中的加湿技术研究

介绍了质子交换膜燃料电池的原理与特点 ,分析了对质子交换膜燃料电池电动汽车燃料供给系统进行加湿的必要性 ,并对系统所需加湿量进行了计算 ,最后设计开发了适于车载使用的加湿方案     

汽车碰撞中数据采集与分析

介绍了汽车碰撞试验中电测量系统的要求与构成,通过VB和Matlab混合编写的数据分析软件对试验数据进行分析。对汽车正面碰撞乘员的各个伤害指标进行计算,提供了一种汽车安全性能客观的评价方法,同时也为汽车安全气囊的开发与系统匹配提供了重要的试验依据。     

Carbonaceous mesophase spherule/activated carbon composite as anode materials for super lithium ion capacitors

A series of carbonaceous mesophase spherule/activated carbon composites were prepared as anode materials for super lithium ion capacitors using carbonaceous mesophase spherules as the core materials and pitch as the active carbon shell precursor.The structures of the composites were examined by scanning electron microscopy and X-ray diffractometry.The electrochemical performance was investigated in electric double layer capacitor and half-cell.The results show that,the composite exhibits good performance in...     

Calibration of split Hopkinson pressure bar system with special shape striker

In order to present basic guidance for system calibration of split Hopkinson pressure bar(SHPB) with the special shape striker,wave characteristics and dynamic responses of SHPB under striker impact were analyzed.Stress generated by the special shape striker tends to have a half-sine waveform and has little wave dispersion during its propagation.Impact velocities of the special shape striker and peak values of generated stress still have linear relation but with a different coefficient from that of cylindri...     

Consensus tracking protocol and formation control of multi-agent systems with switching topology

Consensus tracking control problems for single-integrator dynamics of multi-agent systems with switching topology are investigated.In order to design effective consensus tracking protocols for a more general class of networks,which are aimed at ensuring that the concerned states of agents converge to a constant or time-varying reference state,new consensus tracking protocols with a constant and time-varying reference state are proposed,respectively.Particularly,by contrast with spanning tree,an improved con...     

非氰路线合成含氰基偶氮分散染料

为了避免传统氰化路线合成含氰基偶氮分散染料产生的含铜废水对环境带来的污染,由甲酰胺作氰基化试剂、乙酸酐作脱水剂、氯化亚铜作催化剂的非氰路线,在一定的温度下合成了3支含氰基偶氮分散染料,并对影响反应的甲酰胺用量、乙酸酐用量、乙酸钠用量,氯化亚铜用量等因素作了分析。实验结果表明,由非氰路线合成的含氰基偶氮分散染料的收率为73.8%～84.9%,影响反应的最主要因素是氯化亚铜的用量。产物通过红外光谱、紫外光谱、质谱等手段确证了所合成染料结构。     

模拟短波接收机的数字化及其实现

介绍了一种模拟短波接收机数字化改造的设计方案.设计中沿用模拟短波接收机接收短波信号,对其输出的中频信号进行增益控制、模数转换、分集合成、信号解调、数模转换和低通滤波等数字化处理,从而改善了短波无线通信系统的性能,提高了接收信号的信噪比.     

高速突发模式光接收机性能分析

针对无源光网络(PON)中上行突发信号的特点,从误码率、信噪比和信道利用率3个方面对直流耦合突发模式光接收机和交流耦合突发模式光接收机的性能作了对比分析.并给出了改善突发光接收机信噪比和信道利用率的实现方案,对高速突发接收方案的设计有较好的指导意义.