宏程序在华中世纪星数控车床中的应用

简单介绍了宏程序的内容及编写格式，用实例说明了采用数控车床加工典型零件的宏程序编程方法。     

Study on the Microbial Fermentation Feed Formula and Its Turning Process of Dairy Cows

This experiment was conducted to study the effects of eight microbial fermentation feed formulas and the different turning processes on the yeast viable bacterial number and three kinds of nutritional active substance contents to determine the optimal formula and its turning process.Nine kinds of local agricultural products,such as wheat bran,rice bran,cottonseed meal and corn flour,were used as fermentation materials and eight different formulas were designed by mixture design of DPS.Saccharomyces cerevisiae BC,XR4 and Bacillus subtilis A15 were mixed by 2:2:1 and inoculated in the eight formulas to conduct solid state fermentation.The yeast viable bacterial number and the content of mannan,β-glucan and polypeptide were measured to screen the optimal formula.Basing on the optimal formula,the turning process experiment was conducted.There were three groups:Control group,experimental group 1 and 2.The control group was without turning process,while the feed in the experimental group 1 was turned once and the feed in the experimental group 2 was turned twice.The material temperature,yeast viable bacterial number and three kinds of nutritional active substance contents were measured to determine the optimal turning process.The results showed that:① Formula 8 was the optimized formula which consisted of 8.62% wheat bran,5.85% vinegar residue,20.89% rice bran,12.55% cottonseed meal,11.35% corn flour,7.31% corn bran,1.10% corn residue,25.36% sugar residue,5.35% corn germ meal,1.02% (NH₄)₂SO₄,0.50% KH₂PO₄ and 0.10% MgSO₄.② The best turning process of formula 8 was turning twice during the solid state fermentation.When the material temperature reached 35℃,the first turning was conducted and then when the temperature reached 42℃,the material would be turned again.After that the material continued fermenting until the end.Its optimal indexes were viable bacterial number was 4×10⁵ CFU/g,and the content of mannan,β-glucan and polypeptides were 41.28 mg/100 mg,87.06 mg/100 mg and 10.32 μg/100 mg,respectively.Its improved by 100.00%,3.90%,4.89% and 1.67% separately than the control group and improved by 33.33%,3.07%,3.31% and 0.88% comparing with the experimental group 1.     

山茶花组织培养过程中的防外植体褐化试验

针对山茶花组织培养过程中外植体出现褐化的问题,用山茶花的嫩茎段及芽尖为外植体作不同的处理试验,以比较其减轻外植体褐化的效果。得出的结论为:黑暗条件下培养外植体、用1/1000抗坏血酸处理外植体、在培养基中加入一定比例的活性碳、在接种前再剪去一部分茎段外植体、对外植体勤转瓶这些措施在一定程度上可以减轻山茶花组培过程中外植体的褐化程度,从而提高其组培的成功率。     

京郊果园种植几种优质果园草覆盖越冬技术研究

针对白三叶Trifolium repens、杂三叶T.hybridum、鸭茅Dactylis glomerata、百脉根Lotus corniculatus等几种优质果园草在京郊果园难以安全越冬的问题。试验采用覆膜、覆草、浅覆土3种覆盖越冬技术对果园草进行覆盖越冬效果的比较研究。结果表明,覆膜、覆草、浅覆土3种覆盖技术较对照均能显著提早各果园草品种的返青时间,显著提高越冬率和覆盖度。覆膜区的果园草品种较浅覆土和对照区分别提早返青13和20 d以上,越冬率平均分别提高21.8%和60.8%,返青生长到4月1日时草群覆盖度分别提高41%和51.3%,而覆草区的果园草品种较浅覆土和对照区分别提早返青4和8 d以上,越冬率平均分别提高16%和45.3%,返青生长到4月1日时草群覆盖度分别提高14%和22.7%。几种果园草品种覆盖越冬效果的具体表现为覆膜＞覆草＞浅覆土＞对照,但在具体实施中虽覆膜是一种效果最为明显的果园草品种覆盖技术,而覆草技术（干草535 g/m2、厚度约5 cm）更为环保、经济、实用。     

林木生长与养分动态模型研究Ⅱ.杉木蓄积生长方程

在杉木直径生长方程Ｄ＝Ｄｍｔ／（Ｋ＋ｔ）的基础上，进一步提出了杉木蓄积生长方程：Ｙ＝Ｙｍｔ３／（Ｋ＋ｔ）３．蓄积方程和直径方程有一个共同的参数——林木生长特征系数Ｋ，这一特征系数Ｋ为杉木蓄积生长曲线的拐点．检验表明，蓄积Ｙ的１／３次方与直径Ｄ基本保持线性相关，方程参数Ｙｍ（蓄积生长极值）和Ｋ与立地和密度因子的相关性符合和遵循林木生长基本规律和特点     

Study on the Quantity and Age Structure of Rural Surplus Labor Force in China

Based on the data from the Second National Agriculture Census in 2006, this paper analyzed the absolute quantity and age structure of China rural surplus labor force by the classical approach. It showed that the migration of rural labor force was still far away from ＂Lewis turning point＂, and ＂mingong huang＂ （ shortage of peasant workforce） appearing in coastal areas could be explained with the location separation between the labor-intensive industries and rural labor force. It was a feasible and an effective way to push forward the transfer of labor-intensive industries from the east coast to central and Western China to absorb the abundant supply of rural labor force.     

20世纪三四十年代的女性文学与丁玲的文学转折

丁玲在五四精神影响下进入了文学界,以其大胆独白而受到关注。在20世纪三四十年代,她的创作出现了重要转折,从女性革命走向革命女性,这一方面是因为其女性创作找寻不到出路,另一方面是由于其政治选择。在20世纪40年代,丁玲的一些作品还是显露了她的独立思考,随后由于政治因素,丁玲放弃了个性表达,走向配合政治宣传。     

东方红1302R拖拉机液压机械差速转向机构的功率分析

液压机械差速转向机构是利用液压机械无级传动原理,将液压传动与齿轮传动恰当组合的一种新型封闭双流传动机构。转向机构的方案设计、参数匹配、性能分析、强度和刚度计算一直是该领域的研究热点。该文通过建立液压机械差速转向机构传动比与液压功率分流比、液压系统排量比关系式,得出液压功率分流比的合理取值范围; 采用功率流图给出不同工况下履带车辆液压机械差速转向机构内的功率流向,通过对不同工况下机构内两路功率传递的大小及方向比较,分析循环功率的存在条件及其对机构输出的影响。从而为该类机构设计、传动特性分析提供方法。     

立式泵站盘车连续摆度测量法及分析处理系统开发

为了解决难以控制盘车角速度从而导致的测量摆度数据无法与角度对应的问题,通过使用电涡流传感器与新型光栅传感器结合的装置,采用变速盘车自适应的连续摆度测量法,研发基于Matlab开发的摆度分析处理系统,准确计算了泵轴固定测点上的摆度数据,并给出了相应的轴线调整方案,相关成果可应用于大型立式泵站盘车及摆度测量中.