National Museum of Qatar

National Museum of Qatar – Super‐complex steel structures, envelope and 3D BIM. Doha, the capital of Qatar, is developing fast towards a global hub for finance, culture and tourism. The new flagship, the National Museum of Qatar (NMoQ), is currently being completed based on a design by Atelier Jean Nouvel, Paris. The iconic three‐dimensional geometry and the size of the project were extremely challenging for both the design and the works on site.     

Factors affecting conception rates following artificial insemination or embryo transfer in lactating Holstein cows

The objective of this study was to evaluate the factors that may affect conception rates (CR) following artificial insemination (AI) or embryo transfer (ET) in lactating Holstein cows. Estrous cycling cows producing 33.1 ± 7.2 kg of milk/d received PGF_2α injections and were assigned randomly to 1 of 2 groups (AI or ET). Cows detected in estrus (n = 387) between 48 and 96 h after the PGF_2α injection received AI (n = 227) 12 h after detection of estrus or ET (n = 160) 6 to 8 d later (1 fresh embryo, grade 1 or 2, produced from nonlactating cows). Pregnancy was diagnosed at 28 and 42 d after estrus, and embryonic loss occurred when a cow was pregnant on d 28 but not pregnant on d 42. Ovulation, conception, and embryonic loss were analyzed by a logistic model to evaluate the effects of covariates [days in milk (DIM), milk yield, body temperature (BT) at d 7 and 14 post-AI, and serum concentration of progesterone (P4) at d 7 and 14 post-AI] on the probability of success. The first analysis included all cows that were detected in estrus. The CR of AI and ET were different on d 28 (AI, 32.6% vs. ET, 49.4%) and 42 (AI, 29.1% vs. ET, 38.8%) and were negatively influenced by high BT (d 7) and DIM. The second analysis included only cows with a corpus luteum on d 7. Ovulation rate was 84.8% and was only negatively affected by DIM. Conception rates of AI and ET were different on d 28 (AI, 37.9% vs. ET, 59.4%) and 42 (AI, 33.8% vs. ET, 46.6%) and were negatively influenced by high BT (d 7). The third analysis included only ovulating cows that were 7 d postestrus. Conception rates of AI and ET were different on d 28 (AI, 37.5% vs. ET, 63.2%) and 42 (AI, 31.7% vs. ET, 51.7%) and were negatively influenced by high BT (d 7). There was a positive effect of serum concentration of P4 and a negative effect of milk production on the probability of conception for the AI group but not for the ET group. The fourth analysis was embryonic loss (AI, 10.8% vs. ET, 21.5%). The transfer of fresh embryos is an important tool to increase the probability of conception of lactating Holstein cows because it can bypass the negative effects of milk production and low P4 on the early embryo. The superiority of ET vs. AI is more evident in high-producing cows. High BT measured on d 7 had a negative effect on CR and embryonic retention.     

对“电机及拖动基础“课程教学方法的探讨

针对"电机及拖动基础"课程在教学过程中出现的一些问题,分析了问题出现的原因,并结合多年的教学实践经验,从4个方面提出了解决问题的方法.     

模糊理论在高校科技投入-产出决策中的应用

将模糊理论运用到高校科技投入-产出决策中,建立高校投入-产出决策模糊综合评价模型,并对我国31个地区2010年高校科技投入-产出决策进行实证分析.在模型中,将高校科技产出指标作为高校科技投入决策的评价指标,计算科技投入-产出决策的隶属度并进行排序.分析结果表明,高校RD经费和人员投入水平高的地区,其隶属度越大,该地区的高校科技投入决策相对较优,而高校科技隶属度水平低的地区,经费投入是限制其发展的主要因素.     

“天下”观与秦皇汉武时代的美术史——《秦始皇至汉武帝时代对“天下”观念的视觉艺术形塑》导论

本文从东周至秦汉中期政治与社会转型的视角出发,在细致回顾与评析学界对＂天下＂观念进行研究的基础上,从美术史视角通过分析这一时期衍生的带有皇权建构与空间表现特征的美术材料,从而提出对该课题进行重新研讨的可行性。     

施工工艺的漫游动画表现设计构思——以轻钢龙骨石膏板吊顶施工工艺为例

漫游动画在建筑装饰行业的发展和施工工艺表现形式的多样化,是施工工艺的漫游动画表现研究的前提.以轻钢龙骨石膏板吊顶工艺的构思设计为例,一套完整的施工工艺漫游动画表现设计构思,可通过一个包含流线图和画面规划设计两大主要内容的漫游动画构思表格完成.     

应用技术大学目标下人才强校的战略路径--以福建工程学院为例

基于应用技术大学建设的大背景,分析建设应用技术大学目标对人才工作提出的新要求,提出进一步实施人才强校战略的路径及具体措施,即：更新观念,牢固树立科学的人才观;体制创新,可以探索建立有利于人才队伍建设的新机制;突出重点,建设高水平的教学科研团队伍。     

大观园的造园艺术解读

红楼梦中的大观园在中国古典园林建筑史上占有重要的地位.文章从布局结构和诗化意境两方面分析了大观园的美学价值,论证了大观园这座虚拟"园"的现实意义和实际价值.     

基于制动强度的能量回收控制方法

针对高效利用电动车能量的问题,提出了一种基于制动强度的电动汽车能量回收控制方法.基于车辆制动的理想曲线和ECE曲线,结合制动强度将制动情况分成四种类型并给出了每种类型所需制动力.基于模糊控制理论提出了机械制动力和电机制动力分配比例的模糊控制模型,建立了再生制动比例与车辆行驶速度、制动力和电池电荷量三个指标之间的模糊模型.在NEDC工况上进行了实验,结果表明,本文方法在回收能量数量、能量回收率和能量效率等方面都具有更好的性能,能够使电动汽车制动策略更加科学节能.     

综合评判的权数

用统计试验的方法给定综合评判的权数.这样可得到数量化、精确性较好的评判效果,方法也简便易行.