基本曲线

This paper introduces the fundamental principle of smoothness and prediction in use of grey theory in passive angle tracking, and constitutes the module of smoothness and prediction based on the grey algebraical curve model.

介绍了利用灰色理论在无源角度跟踪中进行平滑预测的基本原理，建立了基于灰色代数曲线模型的平滑预测模块，并通过计算机仿真说明灰色代数曲线模型较灰色微分方程等其它几种模型更适合于无源角度跟踪中的平滑预测，并就几种模型的应用范围作了比较。

A portable photosynthesis system made by PPSYSTEM Ltd. was used to study the photosynthetic properties of 3 cultivarsof Rubus idaeus under the field conditions. The results indicated that the individual leave net photosynthetic rates had 2 peaks during a day,an obvious photosynthetic midday slump was observed in A,there was a significant difference in midday depression among the 3 cultivars;evaporation rates of B and C had 2 peaks during a day,while A had 1 peak,and an obvious midday slump was observed in B and C;Stomatic conductance is the key factor of midday slump;Compared with B and C,A had a higher water using efficiency,which will consume less soil water.

利用英国PP-SYSTEM公司生产的TPS-1便携式光合作用测定系统，对3个树莓品种的光合特性进行了比较研究，结果表明树莓叶片光合速率日变化呈双峰曲线，A品种&日中低落&现象明显，B、C品种不甚明显；B、C品种的蒸腾速率日变化曲线基本上为双峰型，日变化过程中的&午休&现象非常明显，而A品种为单峰型，日变化过程中的&午休&现象不甚明显；此外，叶片气孔导度与叶片光合速率的日变化趋势基本一致，呈平行变化趋势，说明气孔导度是影响光合速率的直接因子；较B、C品种而言，A品种具有较高的水分利用效率，说明其更能节约并有效地利用土壤水分。

Three operators, the transpositional, identical and forward differential, are introduced firstly. Then the Bezier curve in conventional Bernstein-Bezier form is transformed to its operator form. Several properties of the curve are discussed in its operator form.

首先引入三个基本算子：移位算子、恒等算子和向前差分算子，然后将Bernstein-Bezier形式的Bezier曲线表示为更为简洁和直观的算子表示形式，并进一步讨论算子表示下Bezier曲线的各种性质，给出相关证明过程。

According to Xuzhou city relevant economic data for 1998-2004 year, this text,on the basis of environmental kuznets curve basic theories of the introduction, substantiates Xuzhou environment of economic development bearing capacity, which analyzes the necessity of economic development of circulation and adopts the economics method to explain the analysis result.

文章在介绍环境库兹涅茨曲线基本理论的基础上，根据徐州市1998-2004年的相关经济数据，实证分析了徐州经济发展的环境承载力趋势，利用环境库兹涅茨曲线分析了循环经济发展的必要性，并采用经济学的方法对分析结果进行了解释。

Measured the basic physical parameters of unsaturated soils in Three Gorges Reservoir area; 2 measured the initial sample matric suction using the unsaturated triaxial testing system, which can be used to evaluate the unsaturated soil strength and stress; 3 the drying and moisture absorption experiments were executed using the Tempe apparatus, and got the Soil-Water Characteristic Curve, permeability coefficients of every stress level were simulated according to the parameters from the SWCC; 4 the unsaturated soil strength tests were carried out using the GDS triaxial testing system, then got the Mohr circle and shear strength parameters; the results from different stress paths were compared; meanwhile, the axial strain-stress ratio-volume strain curve of different matric suction and different radial pressure was got, as well as their relationship; The research, which provided the necessary data and reference for Three Gorges Reservoir area geologic disaster, is the basic component of Three Gorges Reservoir geologic disaster prevention and research, and experimental results will be used directly in the project.

1量测了三峡库区非饱和土的基本物性参数； 2用非饱和土三轴试验仪量测了试样的初始基质吸力，为评估非饱和土的强度和应力水平提供参考； 3用Tempe仪和体积压力板仪进行了非饱和土的干燥和吸湿试验，得到了土-水特征曲线，并根据其参数拟合出各级吸力状态下对应的渗透系数； 4用GDS三轴仪进行了强度试验，得到了Mohr圆和抗剪强度参数；并比较分析了不同应力路径下试验结果；同时得到不同吸力和不同围压下轴向应变-应力比-体应变的关系曲线和其相互关系。该研究是三峡库区地质灾害防治研究工作的基础性工作，其结果将直接应用到工程实际中，为三峡库区地质灾害提供必要的数据和参考。

In this paper the curved spine box girder was taken as a research object,and the shear displacement difference function of large flange plate was put forward.

以曲线脊骨箱梁为研究对象，提出了长悬臂板的剪切位移差函数模式，建立总势能表达式，并应用变分原理导出求解曲线脊骨箱梁剪力滞的基本微分方程和边界条件。

It is necessity to take an impact test for FOPS in laboratory in order to install falling object protective structures at engineering vehicle and check its dependability.

为了对工程车辆的落物保护装置进行可靠性试验提供理论依据，采用冲击动力学的塑性波两侧的动量平衡理论对工程车辆FOPS受冲击时落锤的动态响应进行了研究，建立了锤头变形的基本方程，绘制了方程相应曲线；建立了锤头在冲击过程中任一瞬时变形长度和非变形长度的数学模型，找到了工程应变和冲击速度之间的曲线对于塑性大变形的突变点及影响落锤变形的各个因素和控制变形的依据。

Based on the garment design with the meshes, we assort spline curve into two types, that is to raisene idea that the ring and characteristic line are the basic geometry elements of three-dimensional garment model.

从人体服装设计所用曲面出发，通过对样条曲线进行分类，提出将环和特征线作为人体服装三维建模最基本的几何元素，并详细介绍了利用双线性插值法对人体服装中的两类子曲面进行三维建模的方法，从而在将参数化方法运用到高层次图素如样条曲线、曲面等方面作了尝试和推广

1The soil water c haracteristic curves of four soil layers in this soil were consistent. The satur ated water content, field capacity, wilting coefficient and available water capa city decreased from top soil to bottom in soil profile.(2)The unsaturated hydra ulic conductivity was significant relation with the negative pressure head in ex ponential function and tended to stable when the negative...

土壤的饱和含水量、田间持水量、凋萎系数和土壤有效水的含量均从土壤上层到下层呈降低的趋势；土壤的非饱和导水率与负压水头之间呈负相关的指数曲线变化，当负压水头达到 10 k Pa时，非饱和导水率降低到最小值，且基本趋于稳定；非饱和土壤水扩散率变化于 1.1× 10 - 3～ 1.886× 10 - 3cm2 / min之间，非饱和土壤水扩散率随含水量也呈指数曲线变化。

The article elaborates the basic theory and mathematics model of ablating cornea by Excimer Laser, makes out the model which partition the cornea ablation area to 30 or 60 ablating circles, and arrives at the error of real calculation corve and academic model curve by comparing a with them under the help of MATLAB software, achieves the success of coney experiment and blind eyes' experiment, thus establishes the clinical experiment basis of cornea ablation in advance.

文章论述了准分子激光消融眼球角膜的基本原理和数学模型，提出了把角膜治疗区域有目的地划分成30个或60个消融道的模式，通过MATLAB软件把理论计算曲线和实际模型曲线进行比较，得出它们的消融误差，并且成功进行了动物实验和盲眼实验，提前为角膜屈光的临床实验奠定了基础。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。