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Material and Methods:From March,2008 to January,2009,250 patients(146 Males and 104 Females,ranged from 18 to 82 years old,mean age was 48 years old) enrolled in the First Affiliated Hospital of Kunming Medical College were performed dual energy scan(Group A,200 patients) and Neuro-DSA scan(Group B,50 patients) using DSCT.The patients were randomly divided into Group A and Group B.Regarding to the justification of scan protocol,100 patients in Group A were selected as sub-group to explore the scan protocol.The image quality Was analyzed both in four categories(4.0/60、4.5/60、4.0/70、4.5/70) of flow rate and total amount of contrast-enhanced material and in three categories(100—150HU、150—200HU、200-250HU) of CT value of left common carotid artery.The comparison of two scan approach was based on image quality,radiation does, postprocessing methods,time of scanning and subtraction and data storage amount.To validate the diagnostic capability of DE-CTA virtual unenhanced images,100 patients in Group A were undergoing head scan both in routine non-contrast program and DE-CTA virtual unenhanced program.Mean CT values,signal-to-noise ratio,image quality,sensitivity of lesion identification,and radiation does were applied to comparison.According to diagnostic results of dual energy of cerebral arterial angiography,62 patients out of 200 patients in Group A were confirmed with cerebral vessel lesions,the results were complied with DSA findings(the time between the two methods were within 1 week).

材料与方法收集2008年3月到2009年1月间在昆明医学院第一附属医院行DSCT CTA检查者250例(男性146例，女性104例，年龄范围18-82岁，平均48岁)，随机分为A、B两组，A组200例行双能量头颅CTA扫描；B组50例行Neuro-DSA扫描。A组前100例按对比剂不同流率和总量分为4组(4.0/60、4.5/60、4.0/70、4.5/70)对图像质量比较；按触发时左颈总动脉内平均CT位分3组(100—150HU、150—200HU、200-250HU)，比较图像质量的差异；对A、B两组血管图像质量、辐射剂量、后处理的方法、扫描和后处理时间及数据的容量进行比较分析；A组中前100例行常规与DE-CTA虚拟平扫的平均CT值、信号噪声比、图像质量、病灶显示情况、辐射剂量的比较分析；A组中行DSA检查62例(两种方法间隔时间均1周内)，比较两种检查方法诊断结果是否符合，并对其中24例动脉瘤行动脉瘤部位、数目、形态、瘤颈显示程度、瘤颈大小及瘤体长径和短径的比较研究。

Mean activity coefficients of 12 electrolytes in their aqueoue solutions have been calculated over a wide range of concentration by use of the mean sphere approximation considering the hard-sphere contribution in the calculation proce- dure.

本文应用 MSA 方法，对0～2m 浓度范围内的12种电解质在水溶液中的平均活度系数进行了理论计算，计算结果与文献值吻合得很好。

Mean tumor size was 1.2 cm (range, 0.8 - 1.6 cm), and mean time of RFA application was 13.8 minutes (range, 7 - 21 min). There was minimal or no discomfort, and no treatment-related complications other than minimal breast ecchymosis.

结果测得平均肿瘤大小为1.2公分（范围在0.8 - 1.6公分），平均电烧时间13.8分钟（范围在7 - 21分钟），患者感到不适的情形非常轻微，甚至根本没有不适的感觉，也未发生与治疗相关的任何并发症，即使是最轻微的乳房瘀血。

Edie: No, I mean I really didn't mean it.

我是说我真的不是故意的。

Mean age was 64, and mean duration of time elapsed following stroke was 39 months.

这些病人平均年龄64岁，脑中风后平均39个月。

Results: The prepared AmB-PBCA nanoparticle had a regular spherical or elliptic surface, with a mean diameter of (69.01±28.56) nm. The curve of standard AmB was linear within the range of 1.12-5.60μg/ml: D405=0.1634c+0.0066 (r=0.9993). The average recovery of AmB-PBCA-NP was 99.93%, showing the solution of AmB-PBCA-NP was stable within 12 h. The nanoparticles showed a sustained drug release in vitro within 24 h. The optimized recipe was: DextranT-70 stabilizer without sodium deoxycholate, with a mean encapsulation rate of 56.10% and a drug loading rate of 82%.

结果：制备的AmB-PBCA-NP外观呈圆或类圆形，平均粒径(69.01±28.56)nm，分散均匀；AmB标准品在1.12~5.60μg/ml范围内的线性回归方程为：D405=0.1634c+0.0066，r=0.9993，AmB-PBCA-NP的平均回收率为99.93%，其溶液在12h内稳定性较好；体外释放实验表明24h体外释放具有一定的缓释性；实验发现最优化的处方为稳定剂采用DextranT-70，且不加助溶剂脱氧胆酸钠，其包封率及载药量均比较高，分别为56.10%、82%。

The mean refraction status changed from hyperopic in generation Ⅳ to emmetropia in generation Ⅴ, while in generation Ⅵ, the mean refraction status was myopic, but still, there was one member in generation Ⅵ was hyperopic.

第4代成员的平均屈光状态为远视，第5代为正视，第6代为近视，但第6代中仍有一名成员为远视。

The mean refraction status changed from hyperopic in generation Ⅳ to emmetropia in generation Ⅴ, while Ⅵ, the mean refraction status was myopic, but still, there was on member in generation Ⅵ was hyperopic.

第4代成员的平均屈光状态为远视，第5代为正视，第6代为近视，但第6代中仍有一名成员为远视。

The results show that both the incidence and prevalence rates are increasing over 1996 to 2003; the incidence rate, prevalence rate, survival function, mean onset age, and mean remaining life after onset of females are all larger than those of males. In addition, females are less biologically aged than males at the same chronological age by 1.3279 years in terms of the empirical distribution function of onset age.

研究结果显示，首发率和盛行率皆有逐年上升的趋势，而女性患者之首发率、盛行率、存活机率、首发后之平均余命皆高於男性；此外，若单纯以男、女性患者之首发年龄而论，其经验机率密度函数显示：男性患者之生理年龄比同年龄的女性患者早衰1.3279岁。

I mean, if you end up with us, I mean.

我的意思是如果你最后选择在我们家做保姆的话

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。