The Operations Research Models and Techniques in the Production Planning of Flexible Manufacturing Systems

Based on the definition about the idea of Flexible Manufacture Systems(FMS), a three dimensional systematic views to represent the concept of the FMS production planning and scheduling problem is presented firstly. Next,a four-layer framework model of FMS' s production scheduling problem is put forward. Then, the operations research models and techniques in the static and dynamic scheduling of FMS operation are systematically analyzed, and the existing difficulties are pointed out. Finally,a brief introduction about the trend of using other approaches,such as artificial intelligence (AI) and artificial neural network (ANN), to solve the FMS planning and scheduling problems is given.     

鸡霍乱油乳剂甲醛灭能苗的试验研究

鸡霍乱严重威胁着养鸡业的发展,但是迄今尚未有有效菌苗用于生产.我们从本省病死鸡心血中分离出了28株多杀性巴氏杆菌,经毒力及免疫原性测定从中筛选出毒力强、免疫原性好的Sy—8421作为制苗菌株.该菌株具有典型的多杀性巴氏杆菌的菌体形态,培养特性及生化特性.2个菌可致死2公斤左右的健康家兔;3—5个菌可致死6个月龄的健康敏感鸡.该菌株在改良马丁肉汤培养后,用0.3%的甲醛灭能,以7号白油为佐剂,油、水相按一定比例制成油包水乳剂苗.该菌苗安全性好,以2倍免疫剂量接种2月龄健康鸡观察一周无任何不良反应.在实验室内用256只鸡分9批次作效力实验,其保护率为82.4%,免疫期达6个月以上.免疫后14天即可产生坚强的免疫力.该苗在0—4℃保存3.5个月仍不丧失其免疫效力,保存5个月仍保持其良好的物理性状.对3万余只鸡作中间试验获得了良好的免疫效果.     

New Technology of Profile Grindng for Tow Teeth Difference Cyclodal Gear

Two teeth diffenence cyclodal gears are the key parts in cyclodal reducer. The plate abrasive wheel method which is widely used at home has very low precision and productivity. So it' s the common problem to be immediately solved. The profile grinding technology discussed in this paper has been proved by practical production to be an efficient and economical cycodal gear manufacturing method.     

紫竹鞭段繁殖研究

采用了1、2、3年生的紫竹鞭，分别用10、20、60cm的长度进行埋鞭繁殖，研究不同鞭龄、不同鞭长对紫竹苗生长情况的影响。通过试验，利用数理统计的方法，从中选取紫竹鞭段繁殖的最佳鞭龄和鞭长是2、3年生60cm长的鞭，以供生产上参考。     

电解水对冷藏河豚鱼肉质构及品质变化的影响

为探讨在冷藏条件下电解水保鲜河豚鱼的效果。对冷藏条件下（4℃）河豚鱼质构及与品质变化有关的指标进行了检验。并研究了冷藏开始和结束后河豚鱼的肌肉纤维的变化。结果表明,与直接冷藏的对照组相比,电解水处理可以减缓贮藏过程中鱼肉中的肌原纤维分解,进而减少河豚鱼肉的硬度,弹性和回复性等质构结果的变化。在贮藏结束时,电解水处理的河豚鱼肉硬度,弹性和回复性分别达到对照组的1.10-1.45倍（p<0.05）。并且电解水能够减少贮藏过程中细菌总数、挥发性盐基氮、pH值,硫代巴比妥酸值等品质指标的变化,延长冷藏条件下（4℃）河豚鱼货架期时间2天,延长时间达原货架期时间的50%。     

汽车动力总成-整车系统耦合振动分析

针对汽车发动机引起的整车振动问题,本文将动力总成悬置系统置于整车环境,研究其耦合振动特性。建立了包含动力总成和整车、车身和悬架系统的多体动力学模型,分析了动力总成与整车系统的耦合振动问题。研究结果表明,整车模型的振动特性与6自由度悬置系统模型的振动特性存在差异。经对悬置系统进行参数优化,其减振效果得到了有效改善。     

鳜嗅板的组织学研究

应用光学显微镜、扫描及透射电镜观察了鳜嗅板的组织结构。结果表明：鳜的嗅板不发达。初级嗅板排列方式属于Ｇ型。感觉上皮连续地分布在初级嗅板的外周区。由纤毛细胞、感觉细胞、支持细胞、粘液细胞及基底细胞组成。在扫描电镜下,纤毛细胞顶端的纤毛多而长;感觉细胞可分成有４￣８根短管状纤毛的纤毛感觉细胞和有微绒毛样突起的微绒毛感觉细胞;粘液细胞呈球形或棒状;支持细胞表面有微嵴。在航向电镜下,这些细胞具有一般细胞所     

Fibrinolytic Compounds Isolated from a Brown Alga,Sargassum fulvellum

Two of bioactive natural products were founded in a brown alga, Sargassum fulvellum. After isolation and purification, the molecular structures of these two products were investigated by NMR spectroscopy and GC-mass spectroscopy. The two compounds were identified to be 1-O-palmitoyl-2-O-oleoyl-3-O-(α-D-glucopyranosyl) –glycerol (POGG) and 1-O-myristoyl-2-O-oleoyl-3-O-(α-D-glucopyranosyl) – glycerol (MOGG) which were obtained from Sargassum fulvellum for the first time. POGG and MOGG showed fibrinolytic activity in the reaction system of pro-u-PA and plasminogen.     

超声时间对鲢鱼糜凝胶特性和蛋白结构的影响及相关性

为探究超声预处理对鱼糜凝胶特性的影响,并进一步阐明凝胶特性变化与蛋白二级结构之间的相关性规律,本实验对鲢鱼糜进行超声预处理,探究超声过程中(0～50 min)凝胶强度、色泽、水分分布、微观结构、蛋白分子量以及二级结构的变化。结果显示,超声波处理10 min,鱼糜凝胶强度显著提高,束缚水的能力增强,凝胶网络结构更为致密;但随超声时间的增加,凝胶劣化,不易流动水转变为自由水。凝胶电泳及红外光谱结果显示,随着超声时间增加,鱼糜中蛋白未发生降解或聚集;二级结构中α-螺旋相对含量降低,β-折叠、无规则卷曲和β-转角相对含量增加。通过皮尔逊相关性分析可知,超声预处理促进蛋白质结构展开,更利于鱼糜在加工过程中形成均匀的网络结构,提高凝胶强度以及保水能力。研究表明,适量超声预处理可以通过改变鱼糜蛋白结构,改善鱼糜凝胶特性。本研究可为超声波技术在鱼糜制品加工中的应用提供参考。     

The Analysis of Bending Deformation of Cutter Tooth and Gear Tooth During Shaving Process

In this paper,the variation pattern of the contact point on cutter tooth and gear tooth is analyzed during gear shaving process. According to the shaving force measured by dynamometer, the deformation of cutter tooth and gear tooth at the contact point is calculated by appying the three dimension finite element method. The deformation curve of cutter tooth and gear tooth are obtained by analying deformation in shaving domain. It is the basis of studying relation between shaved amount and deformation.