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Search Results: 1 - 10 of 17679 matches for " 俞梦璐 "
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绵阳市农村居民HBsAg阳性、HBsAg和HBsAb双阴分布现况
,余双彬,,,
- , 2018,
Abstract: 目的 了解绵阳市农村居民乙肝表面抗原(HBsAg)阳性、HBsAg和乙肝表面抗体(HBsAb)双阴分布的现况,为制定农村乙肝防控策略提供科学依据。方法 采取多阶段随机抽样方法抽取163 797名农村居民作为调查对象,对其进行一对一问卷调查,并采取血标本,采用酶联免疫吸附试验(ELISA)对分离出的血清进行HBsAg和HBsAb检测,分析其表达分布的流行病学特征。结果 调查对象HBsAg总阳性率为6.57%〔95%可信区间(CI):6.45%~6.69%〕,双阴率为40.32%(95%CI:40.36%~40.84%)。男性HBsAg阳性率(7.74%)高于女性(5.73%),双阴率(39.93%)低于女性(40.61%);56~65岁人群HBsAg阳性率(7.36%)最高,86~96岁人群双阴率(47.61%)最高;已婚人群HBsAg阳性率(6.63%)高于未婚人群(5.54%)和离异/丧偶人群(6.11%),离异/丧偶人群的双阴率(43.04%)最高;涪城区HBsAg阳性率(9.23%)高于江油市(5.38%)和安县(5.77%),安县双阴率(55.24%)最高;有乙肝家族史人群的HBsAg阳性率(21.01%)高于无乙肝家族史人群(6.41%),双阴率(30.10%)低于后者(40.60%);有乙肝疫苗接种史人群的HBsAg阳性率(3.78%)和双阴率(37.91%)均低于无乙肝疫苗接种史人群(分别为7.30%和40.92%);上述差异均有统计学意义(P<0.05)。结论 绵阳市农村居民HBsAg阳性率和双阴率均较高,高龄、未接种乙肝疫苗者应重点防控。
Objective To determine the prevalence of positive HBsAg and negative HBsAg populations in rural Mianyang, and provide evidence support for proper immunization strategies. Methods A questionnaire survey was conducted on 163 797 rural residents in Mianyang selected through a multistage random sampling strategy. Serum samples were taken from the participants to detect HBsAg and HBsAb with enzyme-linked immunosorbent assay (ELISA). Results Overall, 6.57% 〔95% confidence interval (CI): 6.45%-6.69%〕 of participants were HBsAg positive. In those with negative HBsAg, 40.32% (95%CI: 40.36%-40.84%) had negative HBsAb. Higher prevalence of positive HBsAg was found in the male participants (7.74%) compared with the females (5.73%). But the male participants with negative HBsAg were less likely to have negative HBsAb (39.93%) than their female counterparts (40.61%). Those aged between 56 and 65 years had the highest prevalence of positive HBsAg (7.36%); whereas, those aged between 86 and 96 years had the highest prevalence of negative HBsAg/HBsAb (47.61%). The participants who were married (6.63%), resided in Fucheng District (9.23%), had a family history of Hepatitis B (21.01%) and were not vaccinated (7.30%) had higher prevalence of positive HBsAg than others. Those who were divorced and widowed (43.04%), resided in An County (55.24%), had no family history of Hepatitis B (40.60%), and were vaccinated (40.92%) had higher prevalence of negative HBsAg/HBsAb than others. These differences were statistically significant (P<0.05). Conclusion A high proportion of ruralresidents in Mianyang are HBsAg positive or HBsAg/HBsAb negative. The older population and those without ]vaccination should be the main target in the prevention and control of hepatitis B.
“红丝带青春校园行”活动开展的现况调查
The Investigation on the Current Situation of Red Ribbon Youth Campus Trip

陈曦,周晓婷,余双彬,,袁萍
- , 2018,
Abstract: 目的 了解“红丝带青春校园行”活动的开展现状,为后续“校园行”活动的改进和促进高校艾滋病防控工作提供基础资料。方法 采用定量调查与定性调查相结合的调查方法,对开展了“校园行”活动的8所高校的学生进行问卷调查,并对学生代表进行深入访谈。结果 定量调查中,知晓“校园行”活动学生有902名,占44.35%;知晓本校举办过“校园行”活动学生有618名,占30.38%。知晓者中,参与本校“校园行”活动学生有330名,占66.99%;肯定“校园行”活动具有提高学生防艾意识作用的学生有469名,占75.89%;期待“校园行”活动邀请的明星类型分布较均匀。知晓且参与者中,其参与原因最多的是“掌握防艾知识很重要”(240名,占72.73%);知晓但未参与者中,多数学生未参与的原因是名额有限(115名,占40.78%)及时间冲突(118名,占41.84%)。定性调查中,大部分学生肯定“校园行”活动的目的和意义,收获很多,对“校园行”活动的建议主要涉及活动形式、举办时间和明星类型。结论 “校园行”活动对高校艾滋病防控意义重大,学生接受度高,但 “校园行”活动需要更多高校参与以扩大覆盖面,定期开展以增加持续性,增加形式新颖的健康教育以提高学生参与度,增加防艾技能知识比例以促进“知行合一”。
绵阳市18岁及以上人群腹型肥胖的流行现状分析
Abdominal obesity among people aged 18 and over,Mianyang city

陈曦,周晓婷,刘婷婷,余双彬,,孙圆圆,张璇,袁萍
- , 2018,
Abstract: 目的 了解四川省绵阳市成人腹型肥胖的流行现状,为制定成人腹型肥胖的干预策略与措施提供科学依据。方法 采用多阶段分层整群随机抽样方法,在四川省绵阳市共抽取300 662名18岁及以上居民作为研究对象,对其进行问卷调查和体格检查,以WHO规定的亚太地区标准作为划分成人腹型肥胖的标准。结果 调查对象中,共62 804名为腹型肥胖者,检出率为20.89%。其中男性腹型肥胖者有15 886名,检出率为12.36%,女性腹型肥胖者有46 918名,检出率为27.26%,女性高于男性(χ2=9 887.13,P<0.001);50~59岁年龄组的腹型肥胖检出率最高,为27.40%,腹型肥胖检出率随年龄增长而增加(χ2???┣魇篇?=5 692.20,P<0.001);丧偶者腹型肥胖检出率最高(31.55%),未婚者最低(5.61%);无业者腹型肥胖检出率最高(26.42%),学生最低(4.26%);安州区腹型肥胖检出率最高(33.43%),江油市最低(17.96%),差异均有统计学意义(P<0.001)。结论 四川省绵阳市18岁及以上人群总体腹型肥胖检出率较低,但50~59岁年龄组人群、丧偶者、无业者腹型肥胖检出率较高,应重点关注,采取针对性措施加以防治。
基于FCE-AHP的机场物流竞争力评价研究
Research on the Logistics Competitiveness Evaluation of Airport Based on FCE-AHP
 [PDF]

沈丹阳,
Modern Management (MM) , 2012, DOI: 10.12677/mm.2012.22010
Abstract: 2004年中国机场属地化改革已基本完成,机场作为一个独立的法人实体,其竞争力研究,尤其是物流竞争力研究一直处于起步阶段,尚无系统的关于机场物流竞争力内涵、影响因素、评价、提升策略等方面的研究。本文基于机场物流竞争力的内涵和影响因素界定,通过采用AHP和FCE法建立机场物流竞争力评价模型,并以天津机场为例进行综合评价,根据结果提升天津机场物流竞争力的措施,为机场物流竞争力评价提供了一种行之有效的方法。
Since 2004, China Airport has been basically completed the reform of territorial, as a separate le- gal entity, airport’s competitiveness research, especially the competitiveness of airport logistics still has been in its infancy. There are no system studies on the meaning, influencing factors, evaluation, enhance strategies on airport logistics competitiveness. Based on definition on airport logistics competitiveness and its impact factors the meaning and, this article use the AHP and FCE to establish the airport logistics competitiveness evaluation model, and set Tianjin Binhai Airport as a comprehensive evaluation example. Finally, this article put forward the measures of competitiveness enhancement, based on the evaluation results, which offers an effective method on airport logistics competitiveness evaluation.
绵阳市医务人员HBsAg与HBsAb的血清学检测结果分析
Analysis of serological detection results of HBsAg and HBsAb among health care workers in Mianyang city

余双彬,,陈曦,孙圆圆,张璇,王娟,任涛,王丽萍,袁萍
- , 2018,
Abstract: 目的 分析四川省绵阳市医务人员HBsAg与HBsAb血清学检测结果,了解其乙型肝炎疫苗接种现况及乙型肝炎易感状态,为制定职业高危人群乙型肝炎疫苗接种策略提供参考依据。方法 采取多阶段分层随机抽样的方法,于2014年11月 - 2015年8月,抽取绵阳市2 437名医务人员为研究对象进行现况研究。采用问卷调查的方式面访,采用酶联免疫吸附试验(ELISA)对血清中HBsAg和HBsAb进行检测。结果 调查对象中,HBsAg、HBsAb双阴性率为27.99%(682/2 437),HBsAb阳性率为69.39%(1 691/2 437),HBsAg阳性率为2.67%(65/2 437)。HBsAg、HBsAb双阴性率:男性(32.84%)高于女性(25.55%);≥55岁者(36.14%)最高,25~34岁者(23.08%)最低;初中及以下文化程度者(33.21%)最高,大学及以上文化程度者(26.23%)最低;有乙肝疫苗接种史者(25.40%)低于无乙肝疫苗接种史者(31.21%);安州区(51.87%)最高,江油市(24.40%)最低。乙肝疫苗接种率为60.89%(1 484/2 437),其中女性高于男性,随年龄的增高疫苗接种率呈下降趋势,随文化程度增高疫苗接种率呈上升趋势。差异均有统计学意义(P<0.05)。结论 绵阳市医务人员乙型肝炎易感性仍较高,亟待完善医务人员乙肝疫苗接种策略,及时监测乙肝表面抗体水平,完善疫苗漏补种措施。
基于遗传模糊核聚类的图像分割
,
模式识别与人工智能 , 2013,
Abstract: 针对红外图像的特点和模糊聚类算法对噪声、初始聚类中心敏感等问题,提出一种遗传模糊核聚类算法。该算法对红外图像像素灰度值进行全局的聚类分析并计算最优的聚类中心和隶属度矩阵,根据聚类结果和最大隶属度原则进行红外图像分割。通过实验验证,文中算法能较好地分割含高斯噪声、背景简单或复杂的红外图像。
基于GPU的生物大分子计算平台的构建与优化
,,许菲
- , 2017, DOI: 10.3969/j.issn.1673-1689.2017.10.016
Abstract: 通过生物大分子计算平台对分子动力学的模拟运算,计算值可以描述分子的运动轨迹,从而揭示原子间的内在关系,但这一过程较为复杂且昂贵。作者研究了较低投入下大分子计算平台的构建与优化,在并行GPU条件和CUDA体系下使用AMBER软件包完成分子动力学的模拟运算。通过对两个大分子体系的运算,实验结果表明计算平台达到了60倍的计算加速,实现了较高的加速性能,完成了高性价比的高性能计算平台的建设。
Biological macromolecules by molecular dynamics computing platform for analog operation,calculated value can describe the trajectory of molecules,which reveals the intrinsic relationship between atoms,but the process is more complicated and expensive. In this paper,the construction and optimization to achieve lower investment macromolecules computing platforms,using a software package AMBER molecular dynamics simulation runs in parallel GPU and CUDA system conditions. Through the operation of two large molecules,experimental results show that the computing platform reached 60 times the computing speed up to achieve a high acceleration performance,completed the construction of cost-effective,high-performance computing platform
页岩储层多缝应力干扰下裂缝起裂角计算新模型
 [PDF]

, 王世, 吴方之, 启维, 黄榆杰
Journal of Oil and Gas Technology (JOGT) , 2015,
Abstract:
页岩储层具有低孔、低渗的物性特征。对页岩储层进行增产改造形成复杂裂缝网络是高效开采页岩气的有效手段,但改造过程中多裂缝同时扩展时产生的干扰应力会对裂缝走向产生影响。考虑远场地应力、多缝扩展应力干扰条件下,结合不同起裂理论,建立了水力裂缝被天然裂缝捕获后在天然裂缝端部重新起裂时起裂角计算模型。分析得到,考虑多缝应力干扰条件下,水力裂缝和天然裂缝长度对该情况下的起裂角影响较小,但随着裂缝间距的增大,干扰应力减小,起裂角先增大后减小;且在高逼近角条件下,由于多缝干扰应力的影响,随缝内净压力增大,裂缝起裂角变化不大。而在低逼近角条件下,起裂角随净压力变化,净压力越大,起裂角越小。
分形图像编码的矩阵表示和收敛性分析
,吴乐南
电子学报 , 2004,
Abstract: 分形解码迭代过程的收敛是保证解码正确实现的条件,要研究迭代过程的收敛性首先要把分形编码中的映射用矩阵来表示出来.本文针对Jacqain的分块算法给出了数字灰度图像分形编码的矩阵表示,并提出了一种利用求有向图强连通分量来求矩阵谱半径的方法.
平均紧性约束下的最坏分离空间平滑判别分析*
,陈松灿,
模式识别与人工智能 , 2014,
Abstract: 空间平滑的线性判别分析(SLDA)和基于空间平滑欧氏距离的线性判别分析(IMEDA)是目前结合图像特有的空间结构信息进行图像判别降维的两种主要方法,具有比线性判别分析(LDA)更显著的分类效果.与SLDA和IMEDA不同,文中通过参数化投影方向,约束平均类内散度(或紧性)上界和最大化最坏类间散度(或分离度),产生的降维算法分别称为WSLDA和WIMEDA.它们的求解最终可归结为简单的特征值优化问题,避免使用完整特征值分解的缺点.在Yale、AR和FERET标准人脸集上的实验验证它们的有效性.
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