货运机车

It is presented that the main technical and structure characteristics of the bogie for HX2 AC drive freight electric locomotive.

介绍了HX2型大功率交流传动货运电力机车转向架的主要技术及结构特点。

In order to realize multi-locomotive traction and enhance the capability of locomotive freight,a multi-locomotive wireless synchronous control system for SS3B type locomotive is designed with the technology of wireless communication and controller area network.

中文摘要：铁路运输是国民经济的大动脉，为了实现多机牵引，提高列车的货运能力，采用无线通信技术和CAN控制器局域网络技术设计了一套针对SS3B型电力机车的多机牵引无线同步控制系统。

The design features of standardization, generalization and serialization of main parts on electric locomotive in China are briefed, the current situation of 3 types freight electric locomotive s and 5 types passenger electric locomotives is analyzed, and the necessity of preparing AC DC drive electric locomotive spectrum in China is stated as well.

简述了我国电力机车主要零部件的标准化、简统化、系列化设计特点，分析了货运电力机车3种车型和客运电力机车5种车型的现状，表明了我国交直传动电力机车型谱化的必要性。

Under the circumstances of putting new railway lines into use or improving passenger train speed or increasing freight train tonnage or reforming driving system, Train traction test has become one foundational technical job. It provides scientific data for railway administration to make management decision and transportations plan, to dug potential and increase profit.

机车牵引试验是在新建线路投入运营、客运列车提速、货运列车增加牵引吨位、司乘制度改革及机车交路变化等情况下所进行的一项基础性技术工作，为铁路部门经营决策、制定运输方案、挖潜增效提供科学依据。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。