珠三角城市群内部职能专业化水平测度与分析

对珠三角城市群内部职能专业化水平进行测算,并与产业结构专业化和长三角地区职能专业化水平进行比较。结果显示,珠三角地区产业结构保持基本稳定,但职能专业化水平呈不断上升的趋势,特别是在实施珠江三角洲地区改革发展规划纲要和产业转移政策以来,职能专业化水平上升更为明显,并已高于长三角地区。但职能专业化水平与国际发达地区相比还存在一定差距。     

Application of Sigma Metrics for the Assessment of Quality Assurance in Clinical Biochemistry Laboratory in India: A Pilot Study

Ensuring quality of laboratory services is the need of the hour in the field of health care. Keeping in mind the revolution ushered by six sigma concept in corporate world, health care sector may reap the benefits of the same. Six sigma provides a general methodology to describe performance on sigma scale. We aimed to gauge our laboratory performance by sigma metrics. Internal quality control (QC) data was analyzed retrospectively over a period of 6 months from July 2009 to December 2009. Laboratory mean, standard deviation and coefficient of variation were calculated for all the parameters. Sigma was calculated for both the levels of internal QC. Satisfactory sigma values (>6) were elicited for creatinine, triglycerides, SGOT, CPK-Total and Amylase. Blood urea performed poorly on the sigma scale with sigma <3. The findings of our exercise emphasize the need for detailed evaluation and adoption of ameliorative measures in order to effectuate six sigma standards for all the analytical processes.     

晶体微粒光致旋转的研究

理论分析了光束具有的自旋角动量传递给晶体并导致其旋转的机理。并以碳酸钙粒子为例从理论上的分析了有效功率,粒子形状和大小,以及粘滞系数对旋转角速度的影响。对实验中如何提高晶体旋转角速度具有一定参考价值。     

高校图书馆传染病突发公共卫生事件危机管理研究

近年来,传染病突发公共卫生事件给人口相对密集、学生读者自救能力弱的高校图书馆带来了严重的危机。高校图书馆对其进行危机管理是践行对读者安全负责的必然要求,是提高科学管理能力的有效途径,是贯彻落实科学发展观的重要实践。提高危机意识、加强组织领导、建立健全规章制度、鼓励全员参与、完善环境保障体系,是高校图书馆有效应对传染病突发公共卫生事件的重要途径。     

Inactivation of infectious bursal disease virus by binary ethylenimine and formalin

In this experiment conducted to study the inactivation dynamics of infectious bursal disease virus （IBDV） by binary ethylenimine （BEI） in comparison with formalin, IBDV was isolated from the bursa of infected chickens and its confirmation was done by agar gel precipitation test. Viral suspensions were subjected to inactivation with BEI and formalin for pre-set time in- tervals. BEI was employed at concentrations of 0.001 and 0.002 mol/L while formalin was used at 0.1% and 0.2%. Sampling was done at 6, 12, 24, 36 and 48 h of incubation and samples were tested for their inactivation status in 9-day-old embryonated eggs and 3-week-old broiler chickens. IBDV was completely inactivated by 0.001 and 0.002 mol/L BEI after 36 h of incubation at 37℃, whereas formalin at 0. 1% and 0.2% concentrations inactivated IBDV in 24 h.     

辽宁省农村居民消费结构的动态分析

采用2001~2011年辽宁省农村居民人均消费支出数据,运用恩格尔系数法对其进行分析,揭示了现阶段辽宁省农村居民的消费特征.     

On teaching about the coefficient of variation in introductory statistics courses

The standard deviation is related to the mean by virtue of the coefficient of variation. Teachers of statistics courses can make use of that fact to make the standard deviation more comprehensible for statistics students.     

一类亚纯函数系数的高阶齐次线性微分方程解的性质

在J．K．Langley给出的高阶齐次线性微分方程复振荡的结果的基础上,考虑具有控制系数和系数仅有有限个极点的高阶线性齐次微分方程,研究亚纯系数齐次线性微分方程亚纯解的零点收敛指数,得到了这类方程的线性无关超越解的最少个数和零点收敛指数为有穷的解的最多个数。     

基于RCMLM模型的数学试卷性别DIF研究

RCMLM模型是基于Rasch测量理论的通用拓展模型。利用RCMLM模型对一份普通高中数学试卷进行不同性别的DIF分析。结果表明:该模型可对具有二分计分和多分计分的试题同时进行DIF分析,避免了以往分别对两种计分方式试题进行DIF分析的弊端,保持了试卷的完整性,使DIF分析结果更加有效。     

素数的又一判别法

著名的定理:(ⅰ)P是素数的充分必要条件为。 (ⅱ)P是素数的充分必要条件为。 本文又给出一个判别素数方法:P是素数的充分必要件条为,这里是一个奇数,且。到目前为止,这是较好的判别方法。