双向电液比例张力绞车的直接自适应鲁棒控制

设计了基于比例溢流阀调压回路的双向电液比例张力绞车,并进行了理论分析。针对液压系统的不确定性因素以及卷绕机构参数变化对张力控制的影响,提出了直接自适应鲁棒电液张力控制方法,并用张力负载模拟试验系统进行了研究。理论分析与试验均表明,对于具有不确定性因素的张力跟踪控制,所设计的电液张力绞车及其控制策略,具有良好的控制性能。     

中药“增免散”对免疫抑制鸡免疫功能的影响

将300只1日龄雏鸡随机分成正常对照组、中药“增免散”组、环磷酰胺组、环磷酰胺组 左旋咪唑组、环磷酰胺 “增免散”组,6日龄用鸡新城疫LaSota疫苗免疫点眼滴鼻,14、21、28、35日龄测定鸡血液ND抗体效价、免疫器官指数、细胞免疫功能、红细胞免疫粘附功能等,探索中药“增免散”的免疫增强机理。结果表明:中药“增免散”不但能显著提高Lasota活苗接种雏鸡的特异性HI抗体水平,延长其持续时间,能促进雏鸡免疫器官的生长发育,能显著增高雏鸡外周血T淋巴细胞ANAE阳性率,并对雏鸡红细胞免疫粘附功能具有显著促进作用,而且对环磷酰胺的免疫抑制有部分拮抗作用。     

不同花生品种侧枝发育动态与产量性状研究

花生一级侧枝发育具有不均衡性。第一、二对侧枝出现早，伸长快，其他一级侧枝出现晚，伸长慢。86036－26－1第一、二对侧枝发育相对较早，而其他一级侧枝发育较晚；海花1号和豫花1号第一、二对发育相对较晚，而其他一级发育较快；豫花7号和鲁花9号居中。海花1号一级侧枝及第一对侧枝的二级侧枝数最多，86036－26－1的一级侧枝数及第一对侧枝的二级侧枝数量少。在花针期之前第一对侧枝的伸长与主茎基本同步；花针期之后，第一对侧枝伸长速度超过主茎。86036－26－1的一级侧枝长及株高居首位。86036－26－1第一、二对侧枝饱果率，产量居第一，豫花7号居第二。海花1号虽然荚果数较多，但第一、二对侧枝孢果率较低，产量也较低；鲁花9号居中。     

遵循市场规律 迎接新的挑战

新世纪我们的农业要走向世界市场 ,重点可从两个方面做出努力 ,一是提高农产品质量 ,使之与国际质量标准接轨 ;二是遵循市场供求规律 ,不断调整种植结构。要做好这两方面工作 ,都离不开“种子”这个重心。我国《种子法》的贯彻实施 ,无疑将对加速良种的研究创新、种子生产经营和成果转化产生巨大推动作用。市场农业拉动种业发展 ,种业的发展反过来又推动农业向更高层次迈进。这样的发展趋势 ,对县级国有种子公司来说是个良好机遇。但是《种子法》立足于保护市场运作规则 ,国有种子经营将失去垄断地位。从这点意义上说《种子法》的实施 ,将使…     

Filtering Construct of Adaptive Filter Grou Pwith Multi-scale Decomposition

The principle and method of the adaptive filter and the filtering with wavelet transform were analyzed, and the model and method of adaptive filtering with wavelet transforms for the transient signal was established. The separated noise of signal by the multi-scale decomposition of wavelet transforms, was the input signal of adaptive filter, and accordingly the optimal filtering method of signal-noise decomposition was realized. By the adaptive filter grou Pbased on the wavelet transform, the optimal filtering to the multi-noise of signal is achieved at the same time, and the method presented in this paper has the excellent filtering capability. Examples of application demonstrate that this method presented is excellent to realize the optimal estimate to the valuable signal and noise of the transient signal in the same frequency segment.     

Design for Precision Measurement System Based on Machine Vision

It is difficult to measure the geometric quantity of small parts in finishing, assembling and measuring, because it's easy to break the workpieces' surface and alter their position by means of traditional contact measuring methods.There are some non contact measurers, such as,light feeler pin and interference microscope etc., because of it's high price and strict working conditions,so it's difficult to promote them in widely use. Precision measurement system based on machine vision has the advantages of non contact measuring as well as high performance and low price. Some problems, such as light source, algorithm of edge fitting, auto focusing,are discussed.     

Research of Stocks Inherent Value and Growth of Listed Company

Appraise the Traditional stocks inherent value models ,and point out their shortcomings.Then a improved stocks inherent value model which emphasize growth of listed Company is set up.The improved model can explain the situation for the times of knowledge economy.Finally, the growth of listed company and is studied a analytic Hierarchy Process model to appraise the growth of listed company is set up.     

Data Loading Technology of Data Warehouse

Data warehouse is not the simply data accumulation of operational database. For exerting the function of data warehouse, the construction of data warehouse should be convenient for the data mining and business intelligent work, supply information access, analyze, and share for decision maker. The key to constructing a successful data warehouse is to fully understand the demand of end users from beginning to the end, search and storage data surround users motive closely. This paper first analyzes the data warehouse characteristic and the sort of data component, emphasizes in effective data loading methods and strategies from operational database to data warehouse, gives five sorts data loading methods.