偏常

The linearized partial differential equation of motion is derived based on Euler-Bernoulli beam theory, and reduced to a set of coupled Hill's equations by using Galerkin's method.

首先根据欧拉梁理论建立偏微分运动方程，利用迦辽金法转化偏微分方程为周期变系数常微分方程。

Chapter 4 discusses the stability of a class of nonlinear impulsive partial differential equations. The main idea is translating the stability of the considered nonlinear impulsive partial differential equation into that of the corresponding linear impulsive ordinary differential equation via Gronwall-Bellman inequality with impulse on the basis of comparison theorem.

第四章基于比较定理，主要利用含脉冲的Gronwall-Bellman不等式初步讨论了脉冲偏微分系统的稳定性，将一类非线性脉冲偏微分方程的稳定性化归为线性脉冲常微分方程的稳定性，为将脉冲常微分方程稳定性的有关结论推广到脉冲偏微分方程提供了理论依据并奠定了基础。

Although the mostly eaten fish were Tilapia and Milkfish, the total amount of fish and fishery products being eaten are much higher, and it reach to 129.3 grams per day, and the average daily intake of MeHg is 0.44μg/kg day.

分析鱼类及鱼产品之摄食型态，发现受访者普遍喜欢吃鱼，日常大都有吃鱼的习惯，而年纪越大越喜欢吃鱼，常吃之鱼种虽以吴郭鱼、虱目鱼居多，全体鱼类及鱼产品之食用量偏高，达129.3 g/day，而经由此途径之甲基汞暴露量也偏高，达0.44μg/kg day，危害指标HI值超过1的比例（43.6%）也偏高。

Dry spring weather, less rainfall, often 5,6-northerly winds or southerly wind, temperatures rise faster in April; summer, Temperature and Humidity airstream affected by the ocean, 6,7,8 three months of the year precipitation precipitation 63 to 70 percent; fall, the influence of high pressure Mongolia, sunny weather, the temperature moderate and pleasant weather, late autumn and more northeasterly winds, cold weather in winter, the Siberian cold high impact, the prevailing northwest wind, cold and dry climate, Shaoyang weather, less rainfall.

春季气候干燥，降水量少，常有5、6级偏北风或偏南风，4月份气温回升快；夏季，受海洋温湿气流影响，6、7、8三个月降水占全年降水量的63%-70%；秋季，受蒙古高压影响，晴朗少雨，温度适中，气候宜人，深秋多东北风，有寒潮天气发生；冬季，受西伯利亚冷高压的影响，盛行西北风，气候寒冷干燥，天气晴朗少云，降水少。

Let the obtained modality parameters be substituted into the coupling vibration partial differential equation and transform the complex partial differential equation into the variable coefficient nonlinear or...

把所得模态参数代入耦合振动偏微分方程中，将复杂的偏微分方程转化为变系数非线性常微分方程组，用Runge-Kutta方法获得方程的数值解。

On the basis of the mathematical model, the dynamic derivative of the aircraft at the different angles of the tailplane was analyzed using the technique of dynamic derivative simulation.

在非定常建模的基础上，采用动导数仿真，分析了不同平尾偏角时的动导数，结果表明，水平尾翼偏角主要对零动态阻尼所对应迎角有较大影响，随着舵偏角的增大，该迎角减小。

Cerebrovascular diseases can lead to hemiplegia, hemiparaesthesia and hemianopia. However, patients with poor eyesight resulting from bilateral cerebral infarction are rare.

脑血管病常引起偏身运动功能障碍、偏身感觉障碍和同向性偏盲，但双侧脑梗死引起双眼视力下降至仅存光感的患者较为少见。

The clinical features of PCAA included: forming giant aneurysm in about 80% cases; presenting SAH and induciag focal symptoms e. g. hemiparalysis, paralysis of oculomotor or hemianopsia; showing massive lesion around cerebral peduncule or internal temporal lobe on CT scan; being associated with a fetal PCA.

PCAA的临床特点是：(1)易形成巨大动脉瘤，约占80％；(2)临床表现以SAH最多见，且也常有局灶性症状，如偏瘫，动眼神经麻痹、同向偏盲等；(3)CT检查常可见大脑脚旁或颞叶内侧占位病变；(4)常伴有胎儿型PCA。

In part two, the empirical results indicate that the predictive ability of SGT is much better than GT、ST、t and Normal distribution. SGT can correct not only fat-tailed property, but also defects the low kurtosis of GT and t distribution. For the volatility of asset return setting, the assumption of volatility of assets price is more appropriate than Normal and asymmetric distribution which was often used.

第二部分以实证结果显示偏态一般化t分配的配适能力较一般化t分配、偏态t分配、对称t分配和常态分配为佳，亦即当金融资产报酬率存在高峰态与厚尾现象时，偏态一般化t分配不仅可以解决常态分配所无法捕捉到的厚尾现象，亦可修正一般化t分配与对称t分配无偏态的缺点，对於资产报酬率波动性之设定，比过去常使用的常态分配与对称的分配更为适当。

A lot of the students in middle school or primary school have abnormal psychology. It is surveyed that the students'disorders of learning and handicap of interpersonal relationship stand out.

但在中小学中，却有不少学生存在心理上的偏常，据有关部门进行的心理调查表明，学生的厌学障碍和人际关系问题相当突出。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。