机电一体化饲料加工复合机

传统的饲料加工一般采用的机械，是通过皮带传输或对轮减速机等传输方式，将三相异步电动机的电能转换为机械能，来     

轮胎安装小技巧

我们在使用农机具的时候，都会遇到装轮胎的问题，如何更快更好地安装轮胎．是有一定技巧的。安装轮胎时，应先把轮圈上的铁锈除掉，在内、外胎之间涂一层滑石粉．然后把轮圈放平，放上外胎。     

装轮胎有技巧

农民朋友在使用农机具的时候，都会遇到装轮胎的问题，如何更快更好的安装轮胎也是有技巧的，我们先把轮圈上的铁锈除掉，在内、外胎之间涂一层滑石粉，然后把轮圈放平，放上外胎。[第一段]     

加工弧齿锥齿轮的精确双重螺旋法（Ⅴ）──弧齿锥齿轮副小轮加工的机床调整

在加工大轮的坐标系∑Ｇ中，确定出描述加工小轮切齿过程的坐标系∑Ｐ．根据加工小轮的机床切齿调整参数，确定产形轮的齿面方程．根据啮合原理确定小轮的加工齿面．要求展成出来的小轮齿面与理论齿面之间差别趋于零，并达到理想的接触特征．同时要求计算出来的加工小轮的刀盘参数与加工大轮的刀盘参数一致．     

加工弧齿锥齿轮的精确双重螺旋法（Ⅴ）：弧齿锥齿轮副小轮加工？…

在加工大轮的坐标系ΣＧ中，确定出描述加工小轮切齿过程的坐标系ΣＰ，根据加工小轮的机床切齿调整参数，确定产形轮的齿面方程。根据啮合原理确定小轮加工齿面，要求展成出来的小轮齿面与理论齿面之间差别趋于零并达到理想的接触特征，同时要求计算出来的加工小轮的刀盘参来与加工大轮的刀盘参数一致。     

农机维修小窍门

1.巧装轮胎先除掉轮胎上的铁锈,在内、外胎之间涂一薄层滑石粉,然后把轮圈放平,放上外胎。用脚踏撬棍把外胎一侧轮缘撬入轮圈中,放入内胎,并用铁丝把充气阀固定在轮圈充气阀孔中,最后安装外胎     

加工弧齿锥齿轮的精确双重螺旋法（Ⅱ）─—弧齿锥齿轮副大轮加工的机床调整

采用精确双重螺旋法加工弧齿锥齿轮大轮时，使用双面刀盘、刀倾展成切齿法．加工时，机床和工件的相对运动可以看成是一对弧齿锥齿轮的啮合传动，其中一个齿轮是工件，另一个齿轮称为产形轮，它的轴线是机床的摇台轴线，齿面是刀盘的刃锥面．根据齿轮啮合原理，确定出产形轮的螺旋角，节锥距等几何尺寸，推导出加工大轮时机床调整参数的计算公式．     

农机修理五巧

1．巧装轮胎。先除掉轮圈上的铁锈,在内、外胎之间涂上一薄层滑石粉,然后把轮圈放平,放上外胎。用脚踏撬棍把外胎一侧轮缘撬入圈中,放入内胎,并用铁丝把充气阀固定在轮圈充气阀孔中,最后安装外胎的另一侧。从充气阀相应位置开始,用撬棍把轮胎一部分先撬入轮圈,接着逐渐从充气阀向两边安装,同时用脚踩住与充气阀相应位置的胎面,边踩边撬,就能使外胎的钢丝圈部位逐渐装入轮圈。     

加工弧齿锥齿轮的精确双重螺旋法（Ⅱ）：弧齿锥齿轮副大轮加工的？…

采用精确双重螺旋法加工弧齿锥齿轮大轮昨，使用双面刀盘，刀倾展成切齿法，加工时，机床和工件的相对运动可以看成是一对弧齿锥齿轮的啮合传动，其中一个齿轮是工件，另一个齿轮称为产形轮，它的轴线是机床的摇台轴线，齿面是刀盘的刃锥面，根据齿轮啮合原理，确定出产形轮的螺旋角，节锥距等几何尺寸，推导出加工大轮时机床调整参数的计算公式。     

加工弧齿锥齿轮的精确双重螺旋法（Ⅲ）：弧齿锥齿轮副大轮齿面？…

建立描述加工大轮时切齿过程的坐标系ΣＧ，确定切齿运动参数的单位矢量ｅＧ，ｇＧ，ｐＧ，建立描述加工大轮的刀盘的坐标系ΣＧＣ，确定产形面的有关几何特征矢量，并变换到ΣＧ中，根据刀盘参数建立生产形面方程。由主形面积和大轮齿面的共轭关系，建立大轮齿齿面方程及确定刀具齿面参数，从而确定加工小轮时大轮齿面计算点的位置，并根据啮合原理确定该点曲率。     

开发海冰水资源及改良滨海盐碱土的研究

在总结海冰资源开发利用研究进展基础上,分析环渤海地区盐碱土其特殊的形成过程和原因;并结合研究工程效益提出与海冰淡水农业灌溉密切结合的改良利用对策和相关措施。     

便携式土壤养分远红外消化仪的研制

设计了一种采用单片计算机控制的便携式土壤养分远红外消化仪，脉宽调制式加热，极好地解决了化学消解中热源效率低的问题。由于采用了PID算法进行温度控制，提高了温度控制精度，与常规的消化仪相比，便携式土壤养分远红外消化仪具有热效率高、升温速度快、热惯性小、结构紧凑、重量轻和便携等特点。     

基于有限元方法的凸齿镇压器运动学和动力学分析

为探索凸齿镇压器在作业过程中的运动学和动力学特性,基于验证有效性后的有限元模型,求解了凸齿镇压器外缘点运动轨迹和速度以及加速度随时间的变化规律曲线。结果表明:轮缘点所在凸齿冲击土壤的行为并未在轮缘点竖直方向速度最大时完成;凸齿镇压器轮缘外一点的绝对运动轨迹呈波动状态的余摆线形式;凸齿镇压器轮缘点在接地位置有与前进方向相反的相对滑动。     

Ancient impact and aqueous processes at Endeavour Crater, Mars

The rover Opportunity has investigated the rim of Endeavour Crater, a large ancient impact crater on Mars. Basaltic breccias produced by the impact form the rim deposits, with stratigraphy similar to that observed at similar-sized craters on Earth. Highly localized zinc enrichments in some breccia materials suggest hydrothermal alteration of rim deposits. Gypsum-rich veins cut sedimentary rocks adjacent to the crater rim. The gypsum was precipitated from low-temperature aqueous fluids flowing upward from the ancient materials of the rim, leading temporarily to potentially habitable conditions and providing some of the waters involved in formation of the ubiquitous sulfate-rich sandstones of the Meridiani region.     

A Proposed Batch In vitro Apparatus for Conducting Rumen Fermentation Experiment

This research proposes a batch in vitro rumen apparatus modified from Daisy incubator and procedures of measuring feed digestion by using nylon bag to replace the traditional centrifuging and filtration methods, for the purpose of studying ruminal fermentation. The apparatus consists of 8 sets of airtight reaction vessels which rotated at a speed of 1 r/min and located inside a thermostatic cabin. Optimum procedures was proved to be that the volume of incubation fluid was 400 mL; fineness and size of test feed were 0.125-0.25 mm and 0.4 g, respectively; amount of bags in one vessel was 6; fermentation diet in a single incubation was 4-5 g. Comparing experiments showed that fermentation speed attained with the apparatus was about 15-20% greater than that attained with flask-shaking machine method (revolutionary speed is 100 r/min) and more accurate results could be obtained with the new apparatus. In conclusion, this apparatus could provide an efficient mixing action, and the procedure could allow sensitive detection of differences in ruminal fermentation in a time-saving way.     

A symmetric bipolar nebula around MWC 922

We report regular and symmetric structure around dust-enshrouded Be star MWC 922 obtained with infrared imaging. Biconical lobes that appear nearly square in aspect, forming this "Red Square" nebula, are crossed by a series of rungs that terminate in bright knots or "vortices," and an equatorial dark band crossing the core delimits twin hyperbolic arcs. The intricate yet cleanly constructed forms that comprise the skeleton of the object argue for minimal perturbation from global turbulent or chaotic effects. We also report the presence of a linear comb structure, which may arise from optically projected shadows of a periodic feature in the inner regions, such as corrugations in the rim of a circumstellar disk. The sequence of nested polar rings draws comparison with the triple-ring system seen around the only naked-eye supernova in recent history: SN1987A.     

环巢湖地区宗教旅游资源分析评价与思考

通过实地调研,结合大量文献资料,对环巢湖地区宗教旅游资源进行深入挖掘与全面梳理,并对其进行具体分类与分析。根据层次分析法与Fuzzy模糊评价方法,采用Delphi专家打分,对环巢湖宗教旅游资源进行综合评价,按评分结果大小划分为5个开发等级,最后从全域旅游的视角对环巢湖地区宗教文化旅游进行审视与思考。     

一种新型的海底管道自埋施工技术

介绍了一种利用水流自埋管道SPOILER((管道)搅流器或阻流板)的技术原理、应用的水文地质条件和安装方法。实际应用表明,甬沪宁杭州湾海底管道安装SPOILER后,不仅可以促使海水冲蚀海床快速形成浅沟,达到管道埋深要求,而且还可以节省费用,确保海底穿越管道的稳定运行。     

传统顺流干燥与间歇式顺流干燥工艺的对比试验研究

在自行研制的顺流干燥试验台上，利用水稻对传统流干燥工艺与间歇式顺流干燥工艺进行对比试验研究，确定较佳缓苏时间，总结间歇式顺流干燥工艺的特点。     

A Proposed Batch In vitro Apparatus for Conducting Rumen Fermentation Experiment

This research proposes a batch in vitro rumen apparatus modified from Daisy incubator and procedures of measuring feed digestion by using nylon bag to replace the traditional centrifuging and filtration methods, for the purpose of studying ruminal fermentation. The apparatus consists of 8 sets of airtight reaction vessels which rotated at a speed of 1 r/min and located inside a thermostatic cabin. Optimum procedures was proved to be that the volume of incubation fluid was 400 mL; fineness and size of test feed were 0.125-0.25 mm and 0.4 g, respectively; amount of bags in one vessel was 6; fermentation diet in a single incubation was 4-5 g. Comparing experiments showed that fermentation speed attained with the apparatus was about 15-20% greater than that attained with flask-shaking machine method （revolutionary speed is 100 r/min） and more accurate results could be obtained with the new apparatus. In conclusion, this apparatus could provide an efficient mixing action, and the procedure could allow sensitive detection of differences in ruminal fermentation in a time-saving way.