Preparing Parents for Adoption: An Agency Experience

To prepare for the complexities of family formation, 78 prospective adoptive parents participated in Pre-Adopt, a psychosocial educational orientation program offered by one private nonprofit agency. The five-session curriculum included an overview of adoption policies and procedures, discussion of the child placement process, exploration of couples' adoption concerns and expectations about child characteristics, information about adoption laws and birth-parent/child searches, and examination of anticipatory fantasies about birth parents. Program evaluation yielded statistically significant and clinically meaningful findings about changes in emotional readiness to adopt, parenting knowledge, and satisfaction with group participation, adoption policies and agency practices. Practice implications are considered.     

论教育在西部人力资源开发中的作用

通过分析西部人力资源的基本状况 ,从教育经济学的角度 ,阐述教育对经济的作用。说明西部开发应转变教育观念 ,发挥教育的产业性。大力兴办教育 ,为西部经济发展服务     

科技文化活动与创新人才的培养

高等院校重视创新人才的培养 ,不仅是教育观念的转变 ,还是一种教育价值的选择 ,更是人才培养模式的转换。大学生科技文化活动与人才创新素质的培养密切相关 ,对于创造性人才培养有着特殊的作用。大学生科技文化活动可以强化创新氛围的营造 ,大力塑造大学生的创造人格力量 ,使大学生将书本知识更多地与科研和生产实践相结合 ,培养大学生的创新能力 ,促进大学生创新素质的发展     

内开槽螺纹波导冷腔色散特性模拟研究

根据螺纹波导中模式间的耦合方程组及冷腔色散方程进行了数值计算,分析了2个模式的相互耦合机理。基于圆柱形波导中线性极化TE11模式存在极化简并的特性,将线极化TE11脉冲作为1个探针,采用粒子模拟软件对该腔体进行了3维冷腔模拟;并将模拟结果与数值计算结果进行了比较,两者基本一致。通过计算机模拟得出了混合模式的电场等位线分布图,结合色散方程数值计算分析了内开槽螺纹几何特性变化对波导色散特性的影响规律。     

试论企业中层危机的管理对策——以黄石企业为例

中层危机是目前企业经营过程中经常出现的问题，也是制约企业发展的瓶颈。本文在介绍企业中层危机的基础上，分析了其产生的原因，并针对黄石企业人力资源开发与管理的现状，就如何解决夤石企业中层危机提出对策和建设性建议。     

从主述位理论析议论文语篇构建特点

主位是语篇分析的重要概念，有单项主位、复项主位和句项主位3种类型。主位推进模式主要有效射型、延续型、集中型、交叉型。在议论文语篇中，人际主位运用较多，推进模式较为复杂。     

Bootstrap Estimation of Benchmark Doses and Confidence Limits with Clustered Quantal Data

The benchmark dose (BMD) is an exposure level that would induce a small risk increase (BMR level) above the background. The BMD approach to deriving a reference dose for risk assessment of noncancer effects is advantageous in that the estimate of BMD is not restricted to experimental doses and utilizes most available dose-response information. To quantify statistical uncertainty of a BMD estimate, we often calculate and report its lower confidence limit (i.e., BMDL), and may even consider it as a more conservative alternative to BMD itself. Computation of BMDL may involve normal confidence limits to BMD in conjunction with the delta method. Therefore, factors, such as small sample size and nonlinearity in model parameters, can affect the performance of the delta method BMDL, and alternative methods are useful. In this article, we propose a bootstrap method to estimate BMDL utilizing a scheme that consists of a resampling of residuals after model fitting and a one-step formula for parameter estimation. We illustrate the method with clustered binary data from developmental toxicity experiments. Our analysis shows that with moderately elevated dose-response data, the distribution of BMD estimator tends to be left-skewed and bootstrap BMDL s are smaller than the delta method BMDL s on average, hence quantifying risk more conservatively. Statistically, the bootstrap BMDL quantifies the uncertainty of the true BMD more honestly than the delta method BMDL as its coverage probability is closer to the nominal level than that of delta method BMDL. We find that BMD and BMDL estimates are generally insensitive to model choices provided that the models fit the data comparably well near the region of BMD. Our analysis also suggests that, in the presence of a significant and moderately strong dose-response relationship, the developmental toxicity experiments under the standard protocol support dose-response assessment at 5% BMR for BMD and 95% confidence level for BMDL.     

香豆素类物质的色谱检测进展

香豆素类物质在植物中分布广泛,是豆香型香料的主要成份之一,常用于日用香精中。秦皮中的秦皮甲素,补骨脂中的补骨脂内酯,另外,双香豆素,6,7-二甲氧基香豆素,7,8-二甲氧基香豆素,6-羟基-7-甲氧基香豆素等均属香豆素类物质。目前国内多数是植物(绝大多数为中药)提取物中香豆素类物质的定性或定量分析。国外的文献则偏重于香豆素作为药物在生物体中的代谢机理和生理毒性。色谱检测中应用最多的仪器是高效液相色谱。国外还报道了几种特别的高效液相色谱改进技术:胶束电动毛细管技术,凝胶溶胶通道技术,直角纳米通道技术,二维技术。另外,液质联用技术,薄层色谱和柱色谱,超临界流体色谱法,气相色谱也可用于香豆素的检测。     

企业文化与企业核心竞争力

企业竞争力是指企业由于其产品或服务上的特异性或成本优势而形成的占有市场、获得长期利润的能力.这种能力是其他企业容易模仿的,企业要想获得长期的发展,必须建设竞争对手无法模仿的核心竞争力,而企业文化所包涵的企业经营理念和企业核心价值观是无法进行复制和模仿的,由特定企业文化所形成的企业核心竞争力,其他企业更难以追随与仿效.