Algorithm of Cutter Machining Position during Numerical Controlled Last Carving

Numerical control last making machine is a machine that is used to process shoe last. A new principle of numerical control machining shoe last is put forward aiming at the deficiency of current carving last system. On the basis of the principle, the algorithm of cutter machining position during numerical controlled carving last is analyzed in detail. The complex problem of the calculation of cutter machining positiion is resolved by applying spherical milling cutter that is often used in machining free_curve surface today and taking account of practical situation of the shoe last_making machine. At the same time, the calculation of cutter machining position is realized by program using Visual C++6.0. As a result, the calculation time of cutter machining position is reduced greatly and the efficiency of design is improved. Moreover, the process of carving last is agile and precision of carving last is ensured.     

Parameters of Spiral V-notch Loosen Blasting

Based on the mechanism of spiral V notch loosen blasting,uncoupled explosive loading is adopted to prevent the explosion waves from breaking the wall of the blasting hole. Relative parameters of spiral V notch are analyzed and their calculating formulae are achieved. The expressions of the width of the blasted crack,the length of the developed crack and of the sizes of the blasted lumps are obtained. The relationship between the blastyed effect, the spiral angle, and the notching angle is studied, which provides a theoretical base for developing a blasting strategy with desirable lump sizes.     

棉纤维的微原纤螺旋角和纤维素微晶相对取向指数在植株中的分布

用Ｘ射线衍射法对棉纤维细胞壁的微原纤维旋角和纤维素微晶相对取向指数在植株中的分布规律进行了研究。结果是：微原纤螺旋角随果枝位和果节位的增加略有增加，相对取向指数随果枝位和果节位的增加略有减小。     

我国带壳花生烘烤加工现状与发展

综述了我国当前带壳花生烘烤加工工艺发展进程及其特点,分析了加工技术、加工品种和抗氧化保存技术现状及存在的问题,展望了带壳花生烘烤加工的发展趋势。     

The Research on the Computational Method of Cam Lift in Auto Measuring Instrument for the Cam Shaft

In this paper,the seeking optimum method for determining symmetrical axis of cam, the method for acquiring the obsolute lift value of every sampling-point on cam, and the method for obtaining the lift error of node on cam as well as curve of lift error by fitting with N order harmonic components are described. These methods, mentioned above consist of the computational methods for cam lift error by the computer controlling multi-measuring probes instrument for auto-measuring cam shaft.     

Rapid Prototyping:A New Method of Digital-Architecture Design Study

This research explores the enlightenment on the design conceptualization and visualization in digital architecture.This study uses 3D models as the main source of data,taking the process of design development as its object.A rapid prototyping(RP) technology is used for 3D color output of design models.The substantiated digital models are used as an important media in design interaction.It is found from the study that RP models were an important media in connecting the virtual world and the real world.Designers could verify their intentions and thus increase efficiency by switching between both worlds.The surface attributes of components and the characteristics of architectural spaces could be merges with images,as a way to extend the freedom in the declaration of a surface's appearance.The large amount of design information can be simplified by explicit visualizing design data.     

New Method of Founding Profile Equations and Pressure Angle Formula to the Cylindrical Cam Mechanism with Slide Roller-Follower

According to existent problems on design and application of the cylindrical cam mechanism with the slide roller-follower, the one correct concept about profile design and pressure angle is presented. Based on this concept, the theoretical profile,practical profile,meshing surface equations and pressure angle formula of the cam mechanism are built up by using opp.rotation analysis and offset surface principle. This method is very simple and clear, and avoids the abstract analysing process in meshing principle. The mathematic models built by this paper can be used to design,manufacture and check this type of cam mechanism correctly, and also create conditions to make deeply meshing property analysis of this mechanism.     

黄瓜子叶法筛选蔬菜灰霉病杀菌剂的研究

研究了以“黄瓜子叶法”为特征的蔬菜灰霉病杀菌剂的筛选模式.采用本方法标准药剂速克灵、扑海因获得很好的重复性;接种最适宜的分生孢子浓度为1×10~5/ml;菌丝菌龄对实验结果有明显的影响;采用浸渍法或喷雾法进行药剂处理对实验结果影响不大,但前者操作似更简单.供试乳化剂、溶剂中,除农乳700号及二甲基甲酰胺之外,对蔬菜灰霉病菌均无明显的影响.     

A New Method for Parameterized Design of Metallic Doors and Windows

According to the graphics characteristics of metallic doors & windows design and based on the research of graphics dimension restriction problems. This paper provides a new method for parameterized design of metallic doors & windows in virtue of expression solution. In this method, the restrictions of graphic elements have been changed into the parameter expressions of sizes and positions of graphic elements. Through the calculation of such expressions, the parameter driven method has been reached. Thus the parameterization of graphics can be easier and quicker than before. It can be used to setup the open parameterized graphics libraries.     

Design of a 2 DOF spatial linkage mechanism

A 3D model of a 2 DOF spatial linkage mechanism was built using ADAMS. Kinematic analysis and simulation of the model were performed. The analysis results show that this mechanism meets the design requirements, which provides the basis for further design and control of the mechanism. The main factors that have an impact on mechanism precision subsequently were analyzed and designed. The results show that the sensitivity of the two legs' lengths ranks higher than that of the other design variables. Therefore, the precision design of the bipod is the key point to achieve mechanism precision. The study provides a theoretical foundation for the design, manufacture, assembly, and control of the mechanism.     

Die design of a compacting spring bracket

Based on an analysis of the current die design situation, the numerical simulation software Dynaform was applied to die development. In a compacting spring bracket project, the finite element method and shape forming technology were used to simulate and validate the pressing and forming processes. Top to bottom technology of Pro/Engineering next was adopted to design the die. The result shows such die design methods and technologies can help designers develop dies quickly and accurately and improve productivity.     

一种新的棉花黄萎病抗性鉴定方法

介绍了一种新的快速鉴定棉花品种抗黄萎病的方法——六棱塑料钵定量注菌液法 ,与传统的鉴定方法相比具有以下优点 :1使用有底的六棱塑料钵 ,灭菌后可以重复使用 ,减少了制作营养钵的工作量 ,而且其造型有利于棉苗根系下扎生长。2以价格低廉、通透性好、一次性使用、经高温灼烧的蛭石填充营养钵作生长基质 ,可免去灭菌消毒工序 ,也有利于棉苗根系生长发育。3种子催芽技术出苗整齐、生长健壮 ,每钵只种 1～ 2棵棉苗 ,减小了寄主个体间的竞争。4用六棱营养钵培育棉苗时 ,棉苗根系生长健壮且须根紧贴塑料钵内壁生长 ,采用先用粗铁丝定点伤根再定量注菌液的方法 ,有利于病菌的侵入 ,且不会因伤主根而使病情加重     

Design Method of a Metal V-belt CVT Hydraulic System

The design method on the hydraulic control system is one of the key technologies of a metal V-belt continuously variable transmission(CVT).It can change the ratio of the transmission system by adjusting the pushing force of the pulley.By analyzing the structure characteristics and force relations,the design method of an important parameter of the CVT hydraulic system and the rate of transmission ratio,are put forward by simulating to the emblematical driving models.The structure parameters of the hydraulic system is gotten and validated by simulation on specific driving model.An effective design method is provided to develop the continuously variable transmission system.     

A New Method of Second-Order Analysis of Thin-wall Member

In this paper, based on the theory of the rotation of a cross section around a fixed axis, a new calculation method of second-order stress of space stability for thin wall member is applied. The example given in this paper shows that the conception of this new method of second order analysis is clear and the calculation procedure is concise.     

新的油菜产量测定方法研究初报

采用取样测数法和合并测产法分别对中双4号、华杂6号甘篮型油菜产量进行了测定。结果表明,合并测产法具有取样测数法获得油菜产量要素及理论产量的优点,且便于操作、减轻了工作量,工作效率高,与实收产量的符合程度高,精确度高,为2．1％,其结果准确可靠。     

新的油菜产量测定方法研究

采用取样测数法和合并测产法分别对中双4号、华杂6号甘篮型油菜产量进行了测定。结果表明,合并测产法具有取样测数法获得油菜产量要素及理论产量的优点,且便于操作、减轻了工作量,工作效率高,与实收产量的符合程度高,精确度高,为2.1%,其结果准确可靠。     

一种新的鉴定水稻初级三体的方法

水稻初级三体在水稻遗传育种中起着重要的作用.其归属鉴定通常用Shastry(1960)的粗线期核型分析方法,但这种方法在实际操作中有一定的难度,不易得到分散好的粗线期染色体分裂相.本研究首次尝试利用三体株和正常株同源染色体间DNA含量的差异,用分子标记的手段将量的差异转为自显影带的差异原理去鉴定三体,发现此鉴定结果与粗线