分段

It is difficult to obtain the accurate segmentation threshold of the image. This paper uses the multinomial to approximate the histogram envelope curve by different phase. So the question of how to obtain the accurate segmentation threshold of the image can convert into the solution of the minimum of multinomial, Using this method it can be solved the question how to segment the image more accurately.

对于在图像分割时难于得到图象分割的准确阈值问题，提出利用多项式对直方图包络线进行分段拟合，把图像分割阈值问题转化为求多项式极小值的问题，从而求出用于分割图像不同灰度层次的最优阈值的方法。

Methods The Streptococcus mitis isolated from patient's throat was shaking cultivated in Bact API 20 culture medium, the supernant fluid of which was precipitated with 20%、40%、60%、80%(NH4)2SO4, respectively. The fast protein liquid chromatography was used for final purification. The finally purified proteins were used to challenge rabbits suboutaneously and the responses of fever, diarrhea and reddening of the ears as well as mucous membranes were monitored.

将分离的缓症链球菌在Bact API 20培养基增菌培养后，所得上清液分别用20%、40%、60%、80%硫酸铵分段盐析，进一步快速蛋白液相色谱系统最终纯化，分别皮下注射新西兰兔观察有否体温升高、耳部及粘膜充血、腹泻等致热性表现。

Lithium hydroxide, manganese oxalate and molybdenum trioxide were used as raw materials, LiMno.9Moo.1O2 were synthesized by solid state synthesis method at high temperature.

研究了以一水氢氧化锂、四水草酸锰、三氧化二钼为合成原料，采用高温固相分段加热法合成LiMn_(0.9)Mo_(0.1)O_2。

The development of Wuxi fault presents Episodic evolution feature and undergoes four formation stages, including of the separate chain, motionlessness, activation and reverse.

研究发现该断裂的生长发育有着明显的幕式演化特点：经历了分段连锁、宁静、活化和反转等4个演化阶段，每一阶段都有不同的构造和沉积特点。

In order to analyze transient and steady thermal behavior of GTO device, a strategy to decide GTO's heat transfer model is presented with multipartite LMS method.

为分析器件的瞬态和稳态热特性，提出了用最小二乘法分段拟合GTO传热模型的策略。

Key words: Macroeconomic Time Series; Unit- root Testing; Multiple Breakpoints ; Segmented Trend Stationary; Causality

在单位根检验结果的基础上，本文还对消除趋势后的分段趋势平稳总量之间的因果关系进行了分析。

QIQD uses piecewise quadratic curves to calculate the multiplicator of contending window after a frame collision and the divisor of contending window after a successful transmission, respectively, which is capable of reducing collision probability and improving channel utilization.

QIQD通过分段二次曲线计算数据帧碰撞冲突后增大竞争窗口的倍乘因子和数据帧成功传输后减小竞争窗口的倍除因子，从而能够降低碰撞概率和提高信道利用率。

Hexon protein gene of egg drop syndrome virus, named strain E05 which was isolated from breeding muscovy duck with irregular egg dropping was amplified by PCR and cloned into pMD18-T vector. The recombinant plasmids were identified by digested restriction endonuclease and PCR. The result showed that the nucleotide length of hexon protein gene encoding 910 amino acids was 2733 bp.

运用PCR技术从表现产蛋异常的种番鸭分离鉴定的减蛋综合征病毒 E05株中分段扩增六邻体蛋白基因，分别与克隆载体pMD18-T连接后，转化感受态细胞，对经PCR鉴定和酶切鉴定均为阳性的克隆进行测序，结果表明，E05株六邻体蛋白基因长度为2733 bp，共编码910个氨基酸。

Then,we improve CSFP Model in two aspects:when we ascertain the frequency of default,we use negative binomial distribution to substitute Poisson distribution so that the model can measure the data better;when we ascertain the loss distribution of default,we use Γ-distribution to substitute normal distribution.

其创新与特色一是对贷款组合的风险暴露数进行分段，在每一频段上分别确定风险暴露数分布，进而可以更准确的描述各笔贷款的风险暴露数。二是在确定风险暴露数分布时，用Γ分布替代了传统的正态分布，解决了贷款违约的风险暴露数分布的厚尾问题，进而解决了大宗贷款违约的风险度量问题。三是确定违约频率时，用负二项分布来代替传统的泊松分布，解决了违约频率的方差通常要大于其均值的分布拟合问题。

Using piecewise linearity system theory,the harmonic excitation nonlinear response of clearance restriction cantilever beam system was researched.

运用分段线性系统分析理论，研究间隙约束的悬臂梁振动系统在简谐激励下系统稳态响应的动力学行为。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。