Fetal growth,fetal development,and placental features in women with polycystic ovary syndrome: analysis based on fetal and placental magnetic resonance imaging     

Qing Zhang  Zhong-kun Bao  Mei-xiang Deng  Qiong Xu  Dan-dan Ding  Man-man Pan  Xi Xi  Fang-fang Wang  Yu Zou  Fan Qu 《Journal of Zhejiang University. Science. B》2020,21(12):977

Objective: Polycystic ovary syndrome (PCOS), a common endocrine-metabolic dysfunction in reproductive-aged women, may be involved in compromised pregnancy and offspring outcomes. This study aimed to investigate whether maternal PCOS affects fetal growth, fetal development, and placental features. Methods: This retrospective case-control study included 60 pregnant women with PCOS (PCOS group) and 120 healthy pregnant women without PCOS (control group). Fetal magnetic resonance imaging (MRI) was performed followed by an ultrasound examination and indications for imaging, including known or suspected fetal pathology, history of fetal abnormality in previous pregnancy or in a family member, and concern for placenta accreta. Fetal MRI images were analyzed for head circumference (HC), abdomen circumference (AC), lung-to-liver signal intensity ratio (LLSIR, a prenatal marker of fetal lung maturity), lengths of liver and kidney diameters in fetuses, and placental relative signal intensity on T2-weighted single-shot fast spin echo (SSFSE) imaging (rSI_SSFSE), and placental relative apparent diffusion coefficient value (rADC). Data on height and weight of offspring were collected through telephone follow-up. Results: Compared to the control group, the PCOS group showed the following characteristics: (1) smaller biparietal diameter and femur length in fetuses (P=0.026 and P=0.005, respectively), (2) smaller HC in fetuses (evident after 32 weeks; P=0.044), (3) lower LLSIR and smaller dorsoventral length of liver in fetuses (evident before 32 weeks; P=0.005 and P=0.019, respectively), and (4) smaller placental thickness (evident before 32 weeks; P=0.017). No significant differences in placental rSI_SSFSE or rADC were observed between the groups (all P>0.05). No significant differences in height and weight of offspring during childhood existed between the groups (all P>0.05). Conclusions: There exist alterations of fetal growth, fetal development, and placental features from women with PCOS.  相似文献   

Computing semantic similarity based on novel models of semantic representation using Wikipedia     

Rong Qu  Yongyi Fang  Wen Bai  Yuncheng Jiang 《Information processing & management》2018,54(6):1002-1021

Computing Semantic Similarity (SS) between concepts is one of the most critical issues in many domains such as Natural Language Processing and Artificial Intelligence. Over the years, several SS measurement methods have been proposed by exploiting different knowledge resources. Wikipedia provides a large domain-independent encyclopedic repository and a semantic network for computing SS between concepts. Traditional feature-based measures rely on linear combinations of different properties with two main limitations, the insufficient information and the loss of semantic information. In this paper, we propose several hybrid SS measurement approaches by using the Information Content (IC) and features of concepts, which avoid the limitations introduced above. Considering integrating discrete properties into one component, we present two models of semantic representation, called CORM and CARM. Then, we compute SS based on these models and take the IC of categories as a supplement of SS measurement. The evaluation, based on several widely used benchmarks and a benchmark developed by ourselves, sustains the intuitions with respect to human judgments. In summary, our approaches are more efficient in determining SS between concepts and have a better human correlation than previous methods such as Word2Vec and NASARI.  相似文献   

A novel reasoning mechanism for multi-label text classification     

Ran Wang  Robert Ridley  Xi’ao Su  Weiguang Qu  Xinyu Dai 《Information processing & management》2021,58(2):102441

The aim in multi-label text classification is to assign a set of labels to a given document. Previous classifier-chain and sequence-to-sequence models have been shown to have a powerful ability to capture label correlations. However, they rely heavily on the label order, while labels in multi-label data are essentially an unordered set. The performance of these approaches is therefore highly variable depending on the order in which the labels are arranged. To avoid being dependent on label order, we design a reasoning-based algorithm named Multi-Label Reasoner (ML-Reasoner) for multi-label classification. ML-Reasoner employs a binary classifier to predict all labels simultaneously and applies a novel iterative reasoning mechanism to effectively utilize the inter-label information, where each instance of reasoning takes the previously predicted likelihoods for all labels as additional input. This approach is able to utilize information between labels, while avoiding the issue of label-order sensitivity. Extensive experiments demonstrate that our method outperforms state-of-the art approaches on the challenging AAPD dataset. We also apply our reasoning module to a variety of strong neural-based base models and show that it is able to boost performance significantly in each case.  相似文献   

Countering Youth's Negative Stereotypes of Teens Fosters Constructive Behavior     

Yang Qu  Eva M. Pomerantz  Guohong Wu 《Child development》2020,91(1):197-213

Adolescence can be a time of unconstructive behavior for many youth. This research examined if an intervention countering youth's stereotypes of teens as irresponsible fosters their constructive behavior. In two experimental intervention studies (Ns = 124 and 319) with seventh graders, stereotypes of teens as irresponsible were described as inaccurate portrayals; youth then provided their own observations of teens acting responsibly. Youth in this counterstereotyping intervention (vs. the control) held higher intentions for academic engagement and performed better on an academic task (i.e., a word-search puzzle). Over the 3 days following the intervention, their academic engagement was higher. Youth's risk taking was also reduced. Redirecting youth to see teens as responsible has the potential to provide a foundation for flourishing.  相似文献   

网络对科技期刊青年编辑工作的影响     

韩俊  冯智勇  曲法义  刘晓婷 《黑龙江教育学院学报》2010,29(12)

当代科技期刊在互联网的冲击下呈现网络化趋势。以编辑部实际工作为例,探讨网络条件下青年编辑工作的新方法、新途径,注重实际应用效果,以期为我国科技期刊编辑工作的顺利开展提供参考。  相似文献   

晚清六十年间(1851-1911)华北地区的自然灾害     

周秋光  屈小伟  程扬 《湖南师范大学社会科学学报》2010,39(2)

晚清六十年间(1851-1911年)华北地区(指包括北京、天津、河北、山西和内蒙古)的自然灾害包括水、旱、虫、雹等各灾,灾害的发生怵目惊心,并表现出一定的特点.其因为有自然因素和社会因素,对当时经济和社会的发展造成极大地破坏,这些也为我们今天如何对待自然灾害提供了一定的借鉴.  相似文献   

网络与信息安全实验教学平台的构建   总被引：2，自引：0，他引：2  

唐海涛  孟繁二  孙聪  韩璐  曲学楼 《实验技术与管理》2010,27(9)

信息安全学科是一门实践性非常强的学科,许多安全技术与手段需要在实践过程中去认识和掌握,因此网络与信息安全实验教学平台的建设水平直接关系到创新型科技人才的培养质量.在构建网络与信息安全实验教学平台方面,进行了研究与实践,实验教学效果显著.  相似文献   

基于自我效能的研究生创新动力研究   总被引：1，自引：0，他引：1  

屈晓婷  秦莹 《思想教育研究》2010,(4):95-97

我国研究生群体正逐渐成为担负起建设创新型国家使命的主力军。研究生创新自我效能有助于激发研究生创新的内、外动力。研究生的创新动力来源及影响因素的调查分析表明,要从教育理念、目标、内容及方法等方面强化以激发创新动力为目标的研究生思想政治教育工作。  相似文献   

支格阿龙的事迹比较     

杨甫旺  罗曲 《毕节学院学报》2010,28(3):25-29

《支格阿龙》作为彝族传统文学中的优秀之作,广泛流传于彝区。从滇、黔、川三省彝族有关支格阿龙事迹的文本展示看,四川和云南的相当简略,主要表现在射日月和整治毒蛇等自然灾害方面。而在贵州彝区流传的文本,则以大量的篇幅记载了支格阿龙在统治者的领导下,消灭敌对势力,整治社会秩序的行为和过程。三省彝区的《支格阿龙》文本,反映了不同的社会生产力发展水平。川、滇操北部方言的彝族中,主要表现为与大自然的斗争,贵州彝区则表现为与社会势力的斗争。  相似文献   

从翻译规范理论看Uncle Tom＇s Cabin的两个汉译本     

张曲 《零陵师范高等专科学校学报》2010,(9):204-206

拟以图里的翻译规范理论为视角,通过对不同历史背景下出版的UncleTom’s Cabin两个不同汉译本进行对比分析,考察译者在翻译过程中所遵循的翻译规范,并解释两个汉译本中存在的诸多不同的翻译现象。  相似文献