Design Method for the Individual Anatomical Hip Joint Endoprosthesis

A new design method for the individual hip joint endoprostheses is proposed. By picking up the contour lines from the femur's CT images and making them closed and smoothed, a solid model of the femur is reconstructed using the contour lines by CAD software. An individual anatomical hip joint endoprosthesis is designed with the inner contour curves of the medulla cavity in CAD software. Utilizing the APDL(ANSYS Parametric Design Language) and the CT value per pixel in the CT image for developing a program through which every element of the bone can get its own material property. The finite element model's anisotropy and inhomogeneity of bone material are realized, then the endoprosthesis and the femur-stem contact finite element model can be built in ANSYS. Based on this, calculation on the contact model can be processed. It is feasible to checkout the rationality of the design by comparing the stress distribution in the femur with the situation before replacement. And the results reveal that the method is more reasonable and reliable.     

Study on Computer 3D-Reconstruction Algorithm of the Contour Points Matching Interpolation for Serial Cross Images

A computer 3D-reconstruction algorithm was proposed for serial cross images,which is called contour points matching interpolation algorithm. The intermediate contours betweentwo neighbouring contours are preduced by contour points matching interpolation to form 3D-shapeof the reconstructed object. This algorithm is simple and can be easily implemented. Its advantagesare fast speed and strong adaptability for medical serial cross images 3D-reconstruction. Experi-ments show that the results are satisfactory.     

INTRODUCTION TO A NEW AUTOPROGRAMMING SYSTEM FOR NC LATHE

This paper deals with the BCH autoprogramming system based on the principle of "representing shap with numbers", With this system, the organization of turning process can be accomplished by inputting only some codes and a few characteristic parameters, and the NC block instructions to control the NC lathe via control unit can be output in turn so that it is possible to write a part program at the shop floor which is benifitian for developing a new programming method to be used in a multistage computer manage system with communicating interface.     

纳米铜加蔗糖处理对非洲菊切花的保鲜作用

为探究新型纳米级无机杀菌剂纳米铜(nano-copper,NC)处理对切花的保鲜效应,以非洲菊(Gerbera jamesonii)‘红艳’切花为试材,观测不同浓度NC单独处理及其与蔗糖组合溶液瓶插处理对非洲菊瓶插寿命、观赏品质和水分关系的影响。结果表明,与去离子水处理（对照组）相比,1、3、5 mg/L NC单独处理对非洲菊切花没有明显的保鲜作用,而各浓度NC加3%蔗糖的组合处理均可有效延缓和减轻该切花的花朵萎蔫和花茎弯折等品质劣变症状。其中,以1、3 mg/L NC+3%蔗糖的组合处理效果最为突出,可显著延长该切花的瓶插寿命,并使花枝瓶插期间的鲜重、水分吸收量和水分平衡值均显著高于对照和NC单独处理。试验表明适宜浓度的NC加蔗糖组合溶液瓶插处理对非洲菊‘红艳’切花具有良好的保鲜作用。     

Scanning Beam Method for the Contour Graph

The tracing method is applied to generate the contour graph, it is difficult to find the start point of the interior closed contour beam. This paper presents a general scanning beam method which can be applied to generate color contour graph for elements with arbitrary shape by the object-oriented programming. We give visualization of the elements of triangle the element with 3 Points, triangle element with 6 Points, quadrilateral element with 4 Points, quadrilateral element with 8 Points, quadrilateral Element with 9 Points and the example by the MFC of Visual C++ R6.     

Knowledge Acquisition Approach Based on Fuzzy-rough Set

A new method of knowledge acquisition based on fuzzy - rough set is proposed. The continuous attributes in the decision table are fuzzified with the fuzzy membership functions. Lower and upper approximation of fuzzy - rough set are obtained by defining fuzzy equivalence relation. According to them the decision rules are acquired. At last, an example is illustrated and proves that the approach is effective.     

白皮松种子内含物的提取,分离及生物测定

白皮松种子的内、外种皮及胚乳均含有种类及浓度不尽相同的萌发抑制剂,其中以外种皮含量和抑制能力为最高内种皮次之,胚乳最少,抑制萌发的效果具有广谱性,在内、外各皮及胚乳中均有酸性物质存在,可能是ＡＢＡ类物质、外种皮中有高水平的酚类物质存在,可能与透气障碍有关,各中部分存在的萌发抑制白皮松种子休眠的主要原因之一。     

ALGORITHM AND CONVERGENCE OF TWO-STAGE ITERATIVE PROCEDURE FOR SOLVING SYSTEMS OF LINEAR EQUATIONS

This papr discusses algorithm and convergence of twostage iteratve procedure for solving systems of symmetric positive definite linear equation Ax=b. On the basis of nature splitting of A, this algorithm makes two-step linear iterative procedure (named outer iteration) and makes convergent inner iteraton of any kind.They generate a sequence of approximations {x_h} w.hich converges to the solution Ax=b quickly. This paper also proves is convergene and gives the estimation of error.     

Deformable B-spline Curves and Surfaces Model and Its Finite Element Solution

Deformable models are of great importance for contour extraction and surface reconstruction, which cause the deformable models deform to the object contours due to simulated external force.Deformable B spline models can share the merit of the popular used B splie. From the Lagrangian mechanics, the dynamics equation of deformable B spline curve and surface is derived. Its finite element solution is studied including the finite element generation and element matrix calculation. A example is given to verify its validity.     

客观认识当前农村形势 构建农民增收长效机制

党要做到“立党为公，执政为民”，必须切实维护作为大多数人的农民利益。要保持农民收入的持续稳定增长，必须从全局和战略的高度出发，客观认识当前农民增收面临的新形势，从农业内部、农村内部和农村外部这三个层次全方位地来构建农民增收的长效机制，切实解决好农民增收问题。     

山茱萸茎的解剖结构特征研究

通过石蜡切片方法制片,光学显微镜观察,研究了山茱萸（Cornus officinalis）一年生和二年生茎的横切面形态解剖特征。结果表明,山茱萸茎的初生结构：从外到内由表皮、皮层和中柱组成。表皮由一层排列紧密的表皮细胞构成,细胞外壁乳头状剧烈增厚约1-1.5 ?m,且外方被发达的角质层;皮层发达,且具有大量的厚角组织;髓发达,环髓带明显。次生结构：从外到内由周皮和次生维管组织组成,主要特征体现在年轮线不明显,次生木质部为散孔材。初生结构和次生结构均表现出山茱萸对旱生环境的高度适应。     

AOP-based Secure Program Design

With the expanding of software scale and the intricacy of its structure,a higher demand on the code securityis required. As a new programming methodology, AOP provides a new approach forsecuringprogram design. Using this approach, the secure codescan be abstracted as an individualmoduleand the secure policy can be applied freely, and then, the secure codes take effect to core concern by weaving. Thus the reusebility and security of a program will beenhanced. The main idea of AOP is introduced and the design approach of AOP-based secure program is discussed. At last, an example is illustrated.     

套袋对‘红富士’苹果品质和Ca、Mg、K营养的影响

分别于盛花后25、35、45、55d对‘红富士’苹果进行套袋（果袋为内层红色袋、外层外灰内黑双层纸袋）处理,结果表明,早期套袋有提高果实单果重的趋势,降低果实可溶性固形物含量,对硬度和可滴定酸影响不大。果实成熟时,不同时期套袋对果肉Ca、K含量没有显著差异,但早期套袋增加果肉Mg含量,降低Ca/Mg比值。同时,在盛花后35d进行3种果袋（内层白、外层外灰内灰双层纸袋;内层黑、外层外灰内黑双层纸袋;内层红、外袋外灰内黑双层纸袋）处理表明,与对照（不套袋）相比,套袋使果实单果重增加,可溶性固形物含量降低,Ca含量、Ca/K影响不显著;而内袋红、外袋内黑外灰双层纸袋处理的果实Mg含量显著高于对照,内袋黑、外袋内黑外灰双层纸袋的果实K含量显著低于对照,并且上述两种果袋处理的果实Ca/Mg比值显著低于对照,其余果袋对品质和Ca,Mg,K均无明显的影响。     

Defects detection in the inner surface of pipes based on inverse heat conduction problem

It is a typical ill posed inverse heat conduction problem to estimate the geometry boundary of the inner surface of pipe by the temperature of outer surface. With the establishment of a two dimensional steady model for pipe with irregular inner surface, the inverse problem is transformed into a direct problem and an optimization problem. Based on the temperature at the outer surface obtained from the infrared thermography and the variation of the object function, the conjugate gradient method (CGM) is introduced into the geometry problem. With the numerical analysis of three typical defects, the effects of the measurement errors, choice of the initial value, boundary conditions and number of discrete temperature points are discussed and the proposed methodology is approved.     

Visualization of the FEM Analysis Data by the Object-oriented Programming

The results of Finite Element Method are a lang of data A general method is presented which can be applied to generate color contour image for elements with arbitrary shape by the object oriented programming. The authors give Visualization of the Elements of triangle Element with 3 Points, triangle Element with 6 Points, quadrilateral Element with 4 Points, quadrilateral Element with 8 Points, quadrilateral Element with 9 Points and the example by the MFC of Visual C++ R6.     

Affine invariant shape recognition with particle swarmoptimization algorithm

Focusing on the problem that affine transformation will exist among the contour images due to variation of the viewpoints, a new approach to extract affine invariant features and matching strategy is proposed for shape recognition. First, the centroid distance and azimuth angle of each boundary point are computed. Then, with a prior defined angle interval, all the points in the neighbor region of the sample point are considered to calculate the average distance for eliminating noise. After that, the centroid distance ratios(CDRs) of any two contour points with angle difference of 180° are achieved as the representation of the shape, which would be invariant to affine transformation. Since the angles of contour points changed non linearly among affine related images, the CDRs should be resampled to build corresponding relationship. It could be regarded as an optimization problem of path planning. In our method, a PSO based path planning model is presented to address this problem. The experimental results demonstrate the efficiency of the proposed method in shape recognition with translation, scaling, rotation, distortion and noise interference.     

8份新引优质烤烟品种资源综评

8个从美国、巴西引进的烤烟新品种,经检疫合格后在大田进行品种比较试验,对照为K326。试验结果表明：除OX414属多叶型的品种,栽后68d现蕾外,其他品种现蕾期、中心花开放期等与对照相近。各品种都没发黑胫病和根结线虫病,赤星病和TMV较轻。公顷产量最高的是OX414,其次是NC72“Primed”,第三是NC71。公顷产值最高的是K326,其次是OX414,NC72“Primed”第三,这些品种间无显著差异。NC100、K326、NC72“Primed”等品种上等烟比例、均价、级指和产指4号较高。综合起来看,OX414产量高,K326、NC100、NC71公顷产值、上等烟、均价、级指等较高。COM烟和RGH61各项经济指标都较低。     

Thermo-mechanical coupling analysis of dual-steel-disc of wet multi-disk clutch

To solve the failure problem of power transmission caused by warping, crackle on dual-steel-disc of wet multi-disk clutch, a shipborne wet multi-disk clutch is taken as a research object, models of generation and distribution of friction heat flux are built and numerical methods to solve temperature field and coupled stress field are put forward. Research methods of thermo-mechanical coupling problem of wet multi-disk clutch are proposed. The thermo-mechanical coupling phenomenon of dual-steel-disc is investigated, and the failure mechanism of dual-steel-disc of wet multi-disk clutch is revealed. In the engagement process, the results of temperature field show that the temperature of the dual-steel-disc gradually increases from the inner edge to the outer edge, and the temperature of friction surface reaches the highest at 2.6 s in the 3-second-engagement. The rules of thermal stress distribution are attained that the circumferential tensile thermal stress appears in the region close to the inner edge, while the radial tensile thermal stress appears in the region close to the outer edge. The theoretical basis to solve the thermal failure problem of dual-steel-disc of wet multi-disk clutch is provided.     

不同品种羽衣甘蓝生长期色素含量变化规律研究

基于对彩叶植物羽衣甘蓝彩色形成机理的探索,以12个羽衣甘蓝品种为研究对象,分析了生长发育过程中其内叶（变色叶）、外叶（非变色叶）的叶绿素、类胡萝卜素和花青苷含量变化。试验结果表明,各品种外叶的叶绿素a、b及总量,类胡萝卜素含量在整个生长期内均呈现由高到低的变化规律。观赏期外叶叶绿素含量显著降低,至抽薹期‘名古屋红’叶绿素总量仅占幼苗期的65.7%。内叶叶绿素总量下降幅度大于外叶,降幅最大的是‘名古屋白’,观赏期含量比幼苗期降低了96.1%。内叶类胡萝卜素含量呈上升的变化趋势。内叶的叶绿素a/b比值和类胡萝卜素与叶绿素比值均高于外叶。品种间色素含量也存在较大差异。在幼苗期和观赏期,‘名古屋红’的外叶叶绿素总量、叶绿素a和类胡萝卜素含量最高,‘粉鹤’最低。幼苗期品种间类胡萝卜素含量差异不大,而其他时期则存在显著差异。所有羽衣甘蓝品种在幼苗期均未检测到花青苷,观赏期和抽薹期只有紫色品种的内叶检测到花青苷。花青苷含量由高到低依次是‘红鹤’、‘大阪红’、‘桃鹤’、‘名古屋红’、‘红寿’、‘红鸥’、‘粉鹤’。     

粗糙龙胆根系发育形态学研究

为了解粗糙龙胆的根系特点，采用常规观察和石蜡切片法对粗糙龙胆根系的发育过程和1~4年生根的解剖结构进行研究。结果表明：1年生的实生苗多为直根系，2年以上植株发育为须根系，随着根龄的增加整个根系基本垂直向下或偏向一侧生长。不同根龄的不定根结构相似，由外至内包括表皮、皮层和次生维管组织。随着根龄的增加，表皮逐渐脱落完全，依靠外皮层和其内侧紧邻的外皮层母细胞代替表皮起到保护作用，内皮层宿存，至4龄根并未见明显周皮。维管形成层由2~5层扁平细胞构成；随着根龄的增加次生韧皮部和次生木质部的面积逐渐增大，韧皮薄壁细胞依然占主要部分，次生木质部不发达。在一些4年生根的髓部中央出现新结构即髓心内皮层。因此，粗糙龙胆根系的发育和解剖结构特点与其生长环境相适应，新结构髓心内皮层的发育过程和功能还需进一步研究。