应用随机模拟试验解决三类标准秘书问题

设经理要从一批应聘者中录用一名秘书，以Xn,yn，（n=1，2，…，N）表示n个面试者的绝对名次、相对名次，试确定最优策略τ．本文根据国内外目前对秘书问题的研究成果，运用随机分析，最优停止理论等工具、采用随机模拟试验的办法，对三类标准秘书问题建立了一个适于计算机操作的控制系统．     

癌胚抗原和核仁组成区蛋白在胃活检良、恶性病变中表达

为探讨癌胚抗原(CEA)和核仁组成区蛋白(AgNOR)在胃粘膜活检中对良、恶性病变的诊断意义,我们取105例标本进行观察。结果表明:CEA和AgNOR计数在单纯性胃炎、肠上皮化生、异型增生和胃癌中表达有关系,其阳性率和计数依次增高。CEA、AgNOR表达有显著性差异。因此,CEA、AgNOR对癌和癌前病变的诊断和治疗具有一定参考意义。     

Rosalind Franklin and the Discovery of the Structure of DNA

Science & Education - Issues associated with nature of science (NOS) have long been recognized as an essential component of scientific literacy. While consensus exists regarding the importance...     

基于专利分析的我国云计算技术发展现状研究

本文针对云计算行业相关技术进行深入的专利分析,目的在于摸清国内外云计算行业中的技术发展状况和趋势,并为云计算行业内技术的顺利实施提供专利策略和专利布局建议。本文对云计算技术的总体趋势、专利区域分布、重点专利技术、法律状态和云计算服务模式等做了全面的剖析。从中可了解该领域技术领先国家,重点公司及其技术。为我国云计算云计算专利战略提出发展建议。     

Red blood cell recognition and posture estimation in microfluidic chip based on lensless imaging

On the one hand, lensless imaging technology has become one of the key technologies to achieve point-of-care testing; on the other hand, microfluidic technology has shown great application potential in the field of biological detection. Using mainstream lensless imaging technology to achieve biological cell imaging in microfluidic chips has technical limitations. In particular, it is more difficult to achieve lensless imaging for non-spherical cells in microfluidic chips such as red blood cells. Achieving red blood cell recognition and posture estimation in a microfluidic chip under the lensless imaging, combined with mainstream lensless imaging technology, can provide more effective red blood cell morphological parameters for medical diagnosis. In this paper, the method for red blood cell recognition and posture estimation in microfluidic chips based on lensless imaging is given. First, the relevant theoretical basis is introduced. Then, the models of red blood cell recognition and posture estimation in microfluidic chips based on lensless imaging are given. The effect of red blood cell flipping on lensless imaging is analyzed in the modeling process. Finally, the effectiveness of the proposed method is verified by experiments. Experiments show that the proposed method can well achieve red blood cell recognition and posture estimation through the shape characteristics of red blood cells.     

颠覆性技术遴选的指标体系与流程设计——基于扎根理论的多案例研究

针对目前颠覆性技术评价标准和评审流程系统性研究不足,基于国内外颠覆性技术遴选研究,选取我国科技部主办的全国颠覆性技术创新大赛为主案例,辅以其他颠覆性创新相关赛事、新型人才评价、新型职称评定机制及诺贝尔奖评审机制等6个案例交叉验证,运用程序化扎根理论分析得到111个概念、25个子范畴和8个主范畴,据此设计先质后量的评审原则,设置前期准备、初评、再评和现场评议的遴选流程.其中,在质的判断方面,运用德尔菲调查法,依靠专家直觉对项目是否具有颠覆性进行初步判断;在量的判断方面,邀请专家从技术颠覆、产业变革、经济价值、社会影响这4个维度进行打分,通过加权评分最终计算出各项目综合评分,层层递进以完成颠覆性技术的遴选.为增强颠覆性技术遴选方法的系统性以及各级政府和相关部门决策提供参考.     

Understanding divergent domestication traits from the whole-genome sequencing of swamp- and river-buffalo populations

Domesticated buffaloes have been integral to rice-paddy agro-ecosystems for millennia, yet relatively little is known about the buffalo genomics. Here, we sequenced and assembled reference genomes for both swamp and river buffaloes and we re-sequenced 230 individuals (132 swamp buffaloes and 98 river buffaloes) sampled from across Asia and Europe. Beyond the many actionable insights that our study revealed about the domestication, basic physiology and breeding of buffalo, we made the striking discovery that the divergent domestication traits between swamp and river buffaloes can be explained with recent selections of genes on social behavior, digestion metabolism, strengths and milk production.     

基于BIM的结构钢筋与机电系统翻模研究——以福州市规划院产业楼为例

基于建筑信息模型（Building Information Modeling, BIM)）概念,以福州市规划设计研究院新建大楼为实际案例,应用Autodesk Revit软件将原有CAD图纸进行BIM结构钢筋和机电模型建置,并提出BIM技术虚拟仿真过程中发现的问题。研究结果表明:（１）BIM技术可实际解决工程常常出现钢筋复杂节点、机电管道碰撞的问题;（２）机电系统进行Revit翻模时,不能按原CAD路径绘制,族库不全需建族完善。该研究成果可为后期施工决策提供技术支持,并有助于相关行业人士学习与借鉴。     

自主学习与中国大学英语教学

自主学习理论源于西方,它在二语学习中被看作是一种批判性思考、作决定和独立行动的能力。中国的大学英语教学有自己的特殊性,因而我们不能简单地套用自主学习理论来指导中国的二语学习者。从自主学习理论及影响自主学习的主要因素如信念、动机和环境等方面对我国的大学英语教学进行分析研究,并就如何提高我国的二语学习者自主学习能力提出几点建议。