Results 71 to 80 of about 48,098 (203)

红细胞参数及计算公式对缺铁性贫血与地中海贫血鉴别诊断效能比较

open access: yesZhongguo shiyan zhenduanxue, 2018
目的比较8种红细胞参数及计算公式对缺铁性贫血与地中海贫血鉴别诊断的实际效能。方法用全自动血球仪对本院产检接收的110例缺铁性贫血和211例地中海贫血患者的红细胞参数进行检测,以文献报导的8种红细胞参数及计算公式(依次标记为F1-F8)为鉴别指标,分析它们的灵敏度、特异度、阳性预测值、阴性预测值、约登指数、阳性似然比、阴性似然比、对应的ROC曲线以及曲线下面积(AUC)。结果发现公式F7、F8和F5的鉴别效能明显高于其余5个公式,3个公式的AUC分别为0.978、0.953and 0.925 ...
贺海林   +6 more
doaj  

两种鹎科鸟类的性别鉴定

open access: yes野生动物学报, 2020
性别鉴定对鸟类种群动态、群落结构、栖息地利用以及行为研究都具有重要作用。除了自然选择与性选择,亲缘关系被认为与是否存在性二态有关。白头鹎(Pycnonotus sinensis)与领雀嘴鹎(Spizixos semitorques)隶属于鹎科(Pycnonotidae)不同属,是探讨亲缘关系与性二态差异之间相关性的适宜对象,二者在野外都难以从形态区分性别。本研究以分子为基础,对比同域分布的白头鹎和领雀嘴鹎雌雄个体间在形态上是否存在显著差异。结果表明白头鹎指名亚种在枕部白色斑块面积和尾羽具明显的性二态 ...
曾煜 1 李贺 2 逯金瑶 3 向晨旭 1 李翔 1 付昌健 1 李立 3 邢晓莹 1
doaj  

The Influence of CEO’s Characteristics on Accounting Conservatism:Evidence from Chinese Listed Company [PDF]

open access: yes, 2016
作为会计核算的重要原则之一,会计稳健性对提高企业会计信息质量及减少企业代理成本的作用不可忽视。董事长不直接管理公司,CFO是CEO意见的执行者,CEO作为公司管理团队的核心,实际控制着公司,对公司的影响力广泛而重大。因此,探讨CEO如何影响公司的会计稳健性意义重大。 本文从我国2010-2014年的沪深A股上市公司出发,采用Ball和Shivakumar(2005)的模型研究我国上市公司CEO个人特征(年龄、性别、学历、专业、持股比例、两职兼任情况)如何影响上市公司的会计稳健性。此外 ...
吴小平
core  

Policy Narratives and Empowerment: Implementation of the Swedish National Violence Prevention Program

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT As the Narrative Policy Framework (NPF) begins to unpack issues of power and narratives, the main focus has been on power‐over and domination rather than more transformative notions of power‐to and empowerment. This article draws on insights from gender and policy studies and suggests that the NPF benefits from adopting a multifaceted notion ...
Hilda Broqvist
wiley   +1 more source

大学生性发育和性行为调查研究

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1994
作者调查广州地区1~2年级大学生1008人,结果发现:①男生首次遗精、第二性征出现与女生初潮、第二性征出现,性别差异有显著性(P<0.05);男生心理反应多为对遗精好奇和无所谓,女生以负性情绪为主,②男女生爱慕异性平均年龄有显著性差异(P<0.01);有恋爱经历16.57%,恋爱平均年龄性别差异有显著性(P<0.01)。③男生手淫率30.14%,女生7.60%,性别差异有显著性(P<0.01);接吻、拥抱率12.3%,性别差异有显著性(P<0.05)。④部分学生有异常性心理体验。
doaj  

彩色多普勒能量图及血流显像对甲状腺肿瘤血流特征的评价 附视频

open access: yesZhongguo shiyan zhenduanxue, 2000
目的 探讨彩色多普勒能量图(CDE)和彩色多普勒血流显像(CDFI)甲状腺,对良恶性肿瘤鉴别的意义。方法对56例甲状腺肿瘤患者(良性31例,恶性25例)行 CDE和 CDFI研究,了解肿瘤内部的血流显示与分级情况。结果其血流显示率在 CDE和 CDFI中分别为 82.l%和 57.l%,CDE较 CDFI提高 25.0%(P<0.05)。 CDE对肿瘤血流分级的显示55.4%优于 CDFI,44.6%与 CDFI相同,有显著差异(P<0.01)。根据 CDE与 CDFI中血流分级情况判断肿瘤良恶性 ...
王悦, 张福君
doaj  

Gender Dimensions of Support for Local Policy: Resident, Policymaker, and Policy Gender

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT There is a well‐established triadic relationship between satisfaction with public services, trust in leaders, and policy support in developed democracies. This study takes a novel approach by considering how gender is associated with the strength and direction of these connections, an element underexplored in the literature.
Aliza Forman‐Rabinovici, Itai Beeri
wiley   +1 more source

彩色多普勒能量图及血流显像对甲状腺肿瘤血流特征的评价

open access: yesZhongguo shiyan zhenduanxue, 2000
目的 探讨彩色多普勒能量图(CDE)和彩色多普勒血流显像(CDFI)甲状腺,对良恶性肿瘤鉴别的意义。方法对56例甲状腺肿瘤患者(良性31例,恶性25例)行 CDE和 CDFI研究,了解肿瘤内部的血流显示与分级情况。结果其血流显示率在 CDE和 CDFI中分别为 82.l%和 57.l%,CDE较 CDFI提高 25.0%(P<0.05)。 CDE对肿瘤血流分级的显示55.4%优于 CDFI,44.6%与 CDFI相同,有显著差异(P<0.01)。根据 CDE与 CDFI中血流分级情况判断肿瘤良恶性 ...
王悦, 张福君
doaj  

Correlations between IGF-IR Expression and Clinicopathological Factors and Prognosis in Patients with Lung Adenocarcinoma [PDF]

open access: yes, 2010
Background and objective The incidence of lung adenocarcinoma increases rapidly, and IGF-IR is the key mediator of several growth factors signal transduction, therefore it plays an important role in the proliferation and differentiation of cancer cell ...
Baohui HAN   +4 more
core  

The Inclusion Trade‐Off: Comparing the Design and Functionality of Collaborative Governance Forums

open access: yesPolicy Studies Journal, EarlyView.
ABSTRACT Environmental challenges require collaboration across jurisdictions, often through forums or intermediary spaces for repeated interaction. A persistent forum design question concerns inclusion criteria, or which actors should be included.
Adam Wiechman   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy