Optimal Design of Plane Cascades Based on Wavelet Theory

Based on the optimal control theory and Lagrange interpolation an optimal design model of plane cascades of 3D blade in an arbitrary surface of revolution is established. Using wavelet theory to solve the model, and lots of numerical results are obtained. The results show that the wavelet method is more effective than the conventional methods.     

DS1820数字温度计在微机温度采集系统中的程序编制

采用DS1820数字温度计实现的微机温度采集系统,硬件结构简单．为了保证正确地采集温度数据,必须严格按照DS1820与主机的通信协议编制程序．     

发酵柑桔渣取代麦麸饲育肥猪试验

柑桔渣经微生物发酵后烘干,以１０％～１５％比例取代麦麸添加到猪日粮中 饲喂育肥猪。饲料适口性良好,对猪的采食和增重均无影响。猪只经屠宰解剖表明,发酵 柑桔渣作猪饲料无任何毒副作用。具有明显的经济效益和社会效益。     

沧源蔗区土壤养分现状研究

为了解甘蔗产区土壤养分状况,并根据养分丰缺情况进行合理科学的施肥,最终实现甘蔗高产高糖,对云南省临沧市沧源蔗区采集的185份土壤样品进行养分测定,结果表明：沧源蔗区土壤大部分呈微酸性,53.51%土壤样品的pH在5.5~6.5;有机质含量平均为2.74%;全氮含量极低,75.14%的土壤样品小于0.050%,平均为0.042%;碱解氮含量中等,平均为101.43 mg/kg;全磷含量低,平均为0.082%;有效磷含量低,平均为6.33 mg/kg;全钾含量低,52.97%的土壤样品含量在1.01%~1.50%,平均为1.403%;速效钾含量中等,平均为146.32 mg/kg;微量元素有效锌缺乏,79.75%的含量低于1.5 mg/kg;有效锰、有效铁和有效铜93%以上的土壤样品都高于临界值,铜、铁和锰不缺乏。根据土壤养分分析结果,在沧源蔗区建议有机肥结合速效氮磷钾复合肥施用,有利于甘蔗的高产高糖。     

上海农业旅游发展的动力机制研究

从农业旅游的概念出发,提出上海农业旅游经历了探索成长期和成熟扩展期2个发展阶段,形成了5种经营类型。认为农业旅游的动力机制是由需求系统、引力系统、中介系统和农村支持系统构成。进而指出,在上海农业旅游的发展过程中,改革动力、市场动力、形象动力和社会动力先后在动力机制中发挥主导作用,并形成动态的变化形式。最后提出,由这4个力引发的内生的农村自我发展能力和外生的城市化外援驱动力维系了农业旅游动力机制的运行。     

高剪切复杂流动中的液滴分散浅析

研究高剪切复杂流动中的液滴分散过程及其应用于高压均质机的均质阀设计,考察均质效果。先从物理方程上分析,然后通过建模来验证理论分析的结果。采用UG建模,导入fluent软件进行模拟,改变流道数目、操作压力,以及进口速度,通过流场的流线分析,考察工艺条件的改变对最终均质效果的影响,为新型高压均质机的均质阀设计提供依据。     

THREE CRITICAL POINTS THEOREM AND ITS APPLICATIONS

In this paper, by use of the pseudo-gradient vector field, the three critical points theorem in [2] is extended to the C1 function in the Ba-nach space, and therefore the three critical, points theorem in [5] is strengthened and the existence of the saddle point of the C2 function is discussed.     

NONLINEAR COUPLING IN THERMOELAST1C THEORY AND A SOLUTION TO THE PROBLEM IN THE HALF SPACE

It's recommended that the term coupled in temperature and strain is nonlinear and is significant in thermoelastic theory. Using the solution of linear coupled and uncoupled theory and selecting appropriate general coordinates, authers approach the nonlinear coupled problems with a variational method. A solution to the problem in half space, is given. It is shown that the difference between the nonlinear coupled theory and the linear coupled or uncoupled theory would be notable when the amplitute of temperature is much larger than that of the reference slate.     

赤霉素反应敏感型和不敏感型谷子矮秆突变体的鉴定

采用赤霉素点滴法（苗期）浸渍法（芽期）以及喷洒法（拔节期）对３种谷子矮杆突变体的赤霉素反应敏感性进行了研究,结果表明矮宁黄和６２３Ｃ属赤霉素反应敏感型,它们苗期的叶片和叶鞘及拔节期的节间均可随外加赤霉素而显著伸长,达到正常株（苗）高,ＣＨ８４１１３则属于赤霉素反应不敏感型,多种赤霉素（ＧＡ１,ＧＡ３,ＧＡ７,ＧＡ９）处理均不能其株（苗）高恢复正常,用ＥＬＩＳＡＣ地３各矮秆突变体和正常品种伸长敏感期     

Assessment of cytoplasmic effects of cytoplasmic male-sterile lines in upland cotton

Paired A- and B-lines, cytoplasmic male-sterile (CMS)-lines and main-tainer lines, respectively, were crossed with R-lines (restorer) to produce A × R, R × B and B × R hybrids, which were used in 1993 and 1996 to predict the performance of three lypes of CMS cotton lines available in China. A significant difference in yield and yield components was revealed between paired A × R and B × R hybrids. This difference was greatly influenced by both CMS cytoplasm and the interaction between cytoplasm and nuclear genotypes. It is suggested that there are detrimental effects of CMS cytoplasm on yield and yield components. General combining ability of near-isogenic CMS lines was also affected by this negative effect. The detrimental effect was closely related to an increased number of immature seeds per boll, which might be caused by partial female sterility associated with CMS cytoplasm. The possibility of developing specific combinations of CMS Upland × Upland restorer hybrids that express enough heterosis for yield to overcome the detrimental effect of the CMS cytoplasm is discussed.