前后的

At the end of the chapter, the influence analysis based on ridge combined principal components estimate has been discussed. Third, based on the B-spline method, it used the Atkinson method of the transformation parameter on the bond date and compared the results.

第三章选取上交所交易的国债的一组数据，以B-样条函数为基础，利用上一章的结果以及Box-Cox变换求解变换参数的Atkinson方法，进行数据变换，比较了变换前后的结果。

This thesis takes Tu Fu's pomes from his beginning creation time, through the AnShi armed rebellion, to the time of his resignation in Huazhou as the research object. Firstly, it is because that Tu Fu's poems are the representation of the highest achievement of our traditional poems. Particularly his works created during the AnShi armed rebellion reach the crest of Chinese realism poems creation for its characteristic of "great collection".

本文以杜甫自有作品以来、经历安史之乱再到华州弃官一段时期的诗歌作品为研究对象，首先因为杜诗代表了中国传统诗歌的最高艺术成就，特别是他安史之乱前后的诗歌，以其"集大成"的特色，达到中国现实主义诗歌创作的顶峰。

Using the soft tissue analysis with the pre-and post cephalometric films to compare the changes in adult female with bimaxillary malocclusion.Results:the upper and lower projecting lip were reduced in 2.38mm and 2.22mm individually.

通过对双颌前突的成年女性正畸治疗前后的X-线头影测量片的软组织形态的比较分析，寻求影响唇的形态变化的临床因素。

This paper give two reinforcement methods of the circular hole castellated beam-castellated beam with full-web extremity and castellated beam reinforced by transverse stiffeners.

提出了两种蜂窝梁的补强方法——端部实腹蜂窝梁和孔边设置横向加劲肋。利用AN SY S程序分析补强前后的圆孔蜂窝钢梁，得出端部实腹梁的受力性能优于设置横向加劲肋的梁的结论

The influence of striking detacher on flour milling properties were studied by determining the milling material granularity distribution,by flour yield determination and dough rheological test before and after using striking detacher.

通过对撞击机撞击前后的物料进行粒度分级、出粉率的测定和粉质的化验，讨论了撞击机对制粉效果的影响以及在不同撞击强度下撞击机对面粉品质的影响。

This appears to be helpful in the localization of extratemporal seizure foci.

临近癫痫发作前后的SPECT可以显示脑血流的增加，且对于MRI正常的患者的癫痫发作的定侧和定位很有帮助。

Results:①All gallstones type Ⅰ and Ⅳ in animal models were dissolved quickly, however, MTBE showed somewhat toxicity in inhibiting CNS, so that the dose of MTBE should be controlled precisely.②No abnormal change of liver and renal functions of dogs were found before and after operations.③Choloecyst pathological sections of gallbladder suggested that no evident of damage and inflammation of gallbladder was of found. Hemopexis with reversible histological change was observed in hepatic sinusoid and centeral vein short time after administation of MTBE.

结果：①动物模型的Ⅰ、Ⅳ型结石均全部迅速溶解，但MTBE有一定毒性，其对中枢神经系统有一定的抑制作用，应用时须严格掌握单位时间内的灌注剂量及总量(控制在60ml左右)；②实验犬实验前后的肝、肾功能检查无异常；③病理检查结果提示MTBE对胆囊组织无明显损伤，无严重炎性反应，给药后短期内肝窦和中央静脉有凝血现象，但其组织学变化是可逆的。

Piecewise analysis over the period of different tangential motion is used to overcome the energy inconsistence and the sign function is introduced to solve the second problem.

当处理多刚体系统的冲击问题时，经典的分析方法是通过在无限小的时间间隔上直接积分得到冲击前后的广义速度之间的关系。

Methods: The sample consisted143 children which were in early permanent dentition of ClassⅡ,Division 1malocclusion .Pre-and post-treatment study models were assessed using PeerAssessment Rating index. According to the outcome of treatment, thesecases were classified into three types as "worse, no different","improved"and"greatly improved". The cephalometric analysis and Model Analysis werepreformed with pretreatment lateral cephalograms and study models for"improved"and "greatly improved"cases."T"–test was assessed to find out thesignificant difference between the extraction and nonextraction, and the resultsincluding age factor were analyzed by stepwise discriminant analysis.

应用PAR 指数对矫治前后的143 副恒牙早期的安氏Ⅱ类1 分类错牙合患者牙牙合模型进行评估分析，按矫治结果等级分为三类A、变坏或无改善，B、改善，C、极大改善，然后将B、C 两类患者矫治前的头影测量片及模型分析数据按拔牙与未拔牙进行成组t 检验的单因素分析，找出两组间有显著差异的软硬组织和牙牙合模型指标，对这些指标合并年龄因素进行逐步判别分析。

By experiments of difference air filtration media's disposal, we analyse the functional change at waterproof、oilproof and photocatalysis for filter material after disposal, and discuss the feasibility of nano-sized photocatalysis material's application in air filtration media's disposal.

通过对不同的空气过滤材料利用纳米材料进行不同的后整理的实验测试研究，分析各种滤料的拒水、拒油及光催化性能在整理前后的变化情况，探讨纳米光催化材料在空气过滤材料后整理中应用的可行性。

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。