拖拉机磨合该怎么操作     

王明 《农村百事通》2013,(12)

新拖拉机在投入使用前,要在规定的润滑、转速、负荷条件下运转一段时间,同时进行必要的检查、调整与保养,使技术状态正常化,这一系列工作称为磨合.新购进的或大修后的拖拉机必须经过磨合才能投入使用,否则将缩短拖拉机的使用寿命. 一、发动机空转磨合.按照说明书规定的顺序启动发动机后,使发动机由低速、中速、高速,即由小油门、中油门、大油门的顺序,依次运行各5分钟.  相似文献   

养犬路上大风歌——记沛县曙光良种肉犬繁育基地总经理韩飞     

王明照 《中国农村科技》2001,(6):6-6

江苏省沛县崔寨乡青年农民韩飞，经过几年的苦心钻研，终于取得了规模养狗突破性的成功，打破了肉狗不能大规模养殖的传统。  相似文献   

小创意：让农民赚“活钱”     

王明 《河南农业》2002,(5):28-28

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番茄灵对番茄果实大小及产量的影响     

王明  梅红飙等 《武汉蔬菜》1985,(1):60-61

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Virtual Studio System Technology     

QIAO Yu  HUANG Xi? yue  CHAI Yi 《保鲜与加工》2003,(1):38

Virtual studio system (VSS), a new technology based on virtual reality, develops fast in recent years. Virtual studio concept replaces real background sets with computer generated 3D synthetic and combines real foreground action, with computer generated backgrounds. As VSS need not construct real background sets and has little limitness of time and space, it is regarded as a revolution in TV programs. This paper mainly discusses about the background, technology feature, application and future.  相似文献   

A Review on Class D Audio Power Amplifier Control Techniques     

GONG Wei  ZHUO Luo? wei 《保鲜与加工》2003,(2):117-122

Although class D amplifier has high efficiency, its distortion is larger than linear counterparts due to switching behaviour of power transistors. It is the hotspot of power electronics and audio power amplifier that researching new control technique to improve fidelity of class D amplifier. In this paper, a few novel control techniques in class D audio power amplifier are reviewed.  相似文献   

Application of Continuous Wavelet Transform to Pulse Signal Processing     

XIE Jia? yu  CAI Kun bao  WANG Yong? dong 《保鲜与加工》2003,(1):66

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Finite Element Analysis of Concrete Structures Strengthened with Carbon Fiber Sheet     

WANG Xiao? rong  JIAN Kai? lin  LIU Min  CHEN Guo? fu 《保鲜与加工》2003,(2):132-135

Stress redistributes after the concrete structures strenthened with carbon fiber reinforced polymer sheet. It is a question of secondary loading.Many scholars have studied it and got a lot of achievements.This paper summarizes the methods and analyzes their advantage and shortcoming. Based on it, a new method is proposed.The method is developing in large-scale general software-Ansys by using adding new elements, constitutive relationship, failure criterion,and so on.The calculation formula agrees with the experimental data.  相似文献   

Application of SDL in the Digital System Design     

CHEN Xian? liang  ZHENG Jian? hong 《保鲜与加工》2003,(2):25-28

As a standardized formal language, the SDL has widely been used in the software development. In order to extend its application field, it has been explored to use in hardware design.This paper gives a logical gate circuit-and gate as an example to explain the method of applying SDL to describe and simulate/validate the hardware characters by the SDT tool. The various logic circuits or digital circuits may be made to the SDL packages because the SDL supports the object oriented technology. These packages can be directly invoked in the design of the complex digital system, so it is possible to describe and simulate/validate the complex digital system.The experiment has proved that the application of SDL for hardware design is feasible and rather convenient.  相似文献   

Effect of Reinforced-Concrete Deterioration on Structures     

CHEN Zhao? hui  HUANG He 《保鲜与加工》2003,(2):42-46

s:It is proposed that the research of the structural durability is necessary considering the structural damages under the effect of deterioration of reinforced concrete. The most common reasons, which cause the deterioration of structures in China, are reinforcement corrosion and freeze thaw cycles of concrete. Based on the summarizing of research works of the effect of reinforced concrete deterioration on structures, it is indicated that the structural durability research should be carried out either in view of material science or that of structural science, and should be also considered the interaction of several factors with uncertain nature instead of the determined individual factor analysis. The structural durability of serviceable should be paid much more attention while researching the durability of structural capacity. The effect of reinforced concrete deterioration on structural capacity, rigidity and durability should be researched henceforth.  相似文献