特征参数

In order to successfully implement the space domain segmentation, this paper also develops an algorithm that can distinguish connexity between pixels and extract the feature parameters in one image scanning procedure.

为有效地实现图像空域分割，本文提出了一种可在一次图像扫描过程中实现像素连通判别和特征参数提取的图像空域分割算法。

Physiological indexes of drought-resistance, namely the four water parameters of osmotic potential at the turgor loss pointπ(subscript p, water potential at the water saturation point (π0), bulk modulus of elasticity, and the rate of bound water in cells V(subscript p/V0, for the three fire resistant trees, Schima superba, Cyclobalanopsis glauca, and Elaeocarpus glabripetalus, were studied using the pressure-volume technique.

应用压力－容积分析技术测定了木荷Schima superba，秃瓣杜英Elaeocarpus galbripetalus和青冈Cyclobalanopsis glauca等3个防火树种春季、夏季和秋季的水分特征参数，即初始质壁分离点渗透势π，饱和含水量时的最大渗透势π0，细胞弹性模数ξ，细胞质壁分离时的共质体水体积量与饱和时共质体水体积量之比V/V0。

The results showed that there were significant differences among parameters of texture feature of the different land utilization. In the desertification, the mean and variance were comparatively high. The gray level was asymmetry, the contrasts between neighboring pixels were significant; while in water and irrigable land, the mean, variance was a little bit low, the grey level was symmetry; the mean, variance and gray level in the forest and dry land was between the above (desertification and water and irrigable land).

不同土地利用类型之间纹理特征参数差异明显，荒漠化土地的均值、方差值较高，灰度分布不均匀，相邻像元反差明显，内部变化剧烈；水体和灌溉耕地的均值、方差值很低，灰度值均匀，内部变化小；林地和旱耕地信息介于上述两类土地之间。

Multiangular remote sensing is capable of providing more three-dimensional information of vegetation, and it is powerful in obtaining the parameter of the plants.

多角度遥感包含了大量的地面目标的立体结构信息，具备求解植被特征参数的潜力，但通常多角度遥感反演对光谱信息的利用不足。

The characteristic parameters can also be set orthogonally through adjusting the bias currents of the MO-CCCIIs and the grounded capacitors.

调整MOCCCⅡs的偏置电流和电容值可以改变特征参数，产生的电路具有很低的灵敏度。

Characteristic parameters of separating similar frequency sinusoidal signal can be identified by satisfying termination criterion of 2-norm minimum and solving overdetermined equations on observation matrix.

该算法在观测矩阵的基础上，利用2范数最小的终止准则，通过求解超定方程组，辨识频率相近信号组成的特征参数。

A phase-field model was built by optimizing characteristic parameters in the convec-tional phase-field model for peritectic transition, which is suitable to simulate microstructure evolution for peritectic transition of specific alloys.

通过对当前包晶相变相场模型特征参数的优化，建立了适合对具体合金包晶相变微观组织演化进行模拟的相场模型。

Three kinds of typical shells, such as scallop, whelk, bloody clam, as well as one kind of limestone were chosen to perform desulfurization and calcination experiments on the fluidized bed platform.The microstructures of the tested samples were mensurated by means of one mercury porosimeter.

在流化床上对3种典型贝壳---扇贝、海螺、毛蚶以及一种石灰石进行煅烧脱硫试验研究，并利用压汞仪测定试验样品的微观孔隙结构，通过最可几孔径、孔隙率、比表面积等3个结构特征参数对微观结构进行定量分析；另外，还对试验样品的化学成分进行了分析。

Ricker wavelet whose predominant frequency is 200Hz was chosen as the exciting wave, and the character parameters (predominant amplitude, predominant frequency and frequency bandwidth) of its reflected wave were calculated.

选择主频为200Hz的雷克子波，理论计算原始地震反射波的特征参数（主振幅、主频率、频带宽度）。

The determination of fractal scaleless range is very important for computing the fractal characteristic parameters and modeling the digital elevation.

而分形模型中无标度区的确定直接影响到分形特征参数的求解和DEM建模质量的好坏，常用方法是采用人机交互试验来选取无标度区，缺乏客观标准。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。