检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

污泥资源化利用的途径与分析

环境科学与技术 2005年第2期28卷 92-94页

作者：赵鸣吴广芬李刚烟台大学环境与材料工程学院烟台264005

城市污泥既是污染物又是一种资源。从土地利用、回收能源和生产建材等几个方面对污泥资源化利用的途径进行了介绍,指出从源头控制污泥中重金属的含量对土地利用的重要性,讨论利用污泥生产水泥的方法。

关键词：污泥资源化利用途径分析

在线全文

学校读者我要写书评

暂无评论

混凝土连续刚构桥加固前后荷载试验效果分析

铁道建筑 2009年第3期49卷 56-59页

作者：巴力钟鸣梁志广中国铁道科学研究院铁道建筑研究所北京100081 广州市交通投资集团有限公司广州510410

当前已建桥梁经过多年运营后,部分桥梁已出现较为严重的病害,针对病害桥梁的加固工程也越来越多,加固效果的评定工作更为桥梁界所关注。以某连续刚构桥为例,通过加固前后荷载试验的对比,对该桥的加固效果做了较为详细的分析评定,该方法... 详细信息

当前已建桥梁经过多年运营后,部分桥梁已出现较为严重的病害,针对病害桥梁的加固工程也越来越多,加固效果的评定工作更为桥梁界所关注。以某连续刚构桥为例,通过加固前后荷载试验的对比,对该桥的加固效果做了较为详细的分析评定,该方法可供类似桥梁加固效果评定时借鉴。

关键词：加固荷载试验连续刚构效果评定

Genetic Analysis of Early Generation Stability in Rice

在线全文

学校读者我要写书评

暂无评论

Rice science 2005年第4期12卷 249-254页

作者： ZHOU li-Jun Ao guang-Hui XIAO Yi Wu Xian-Jun li Shi-Gui Yibin Vocational ＆ Technical College Yibin 644007 China Neijiang Normal College Neijiang 641112 China Rice Research Institute Sichuan Agricultural University Wenjiang 611130 China

The mechanism of early generation stability （EGS） in rice was studied via genetic analysis. Three types of crosses were made, namely between EGS varieties, EGS and conventional rice variety, and conventional rice varieties. The genetic analysis was based on the stable lines in F2 population. The stable lines may appear from some combinations of EGS rice crossing with each other and EGS rice crossing with conventional varieties at different frequencies, but stable lines didn＇t appear in conventional varieties crossing with conventional varieties. Genetic analysis results indicated that the EGS phenomena should just exist in special rice materials, and the frequency of stable lines was closely related to the EGS traits of parents. The EGS traits were neither qualitative nor quantitative traits, and they were controlled by neither dominant genes nor recessive genes. The EGS traits might be inherited by F1 single plant, and the traits of F3 and F4 were corresponded to those of F2 population, i.e. F3 and F4 lines derived from non-segregating F2 showed uniform agronomic traits, and those from segregating *** not. The agronomic traits of EGS lines were consistent with those of F1 single plant. On the other hand, when EGS lines occurred, the segregating lines in Mendelian manner were also observed in all F2 population of the same combination. It was suggested that the reason why the stable strains occurred might be a special factor to control （open/close） gene at the beginning of cell division in zygote, resulting in closing mitosis and opening somatic reduction. The somatic reduction of zygote resulted in recombination and homozygosity forming in F1 single plant, and some lines with uniform agronomic traits were observed in some lines of F2 population.

关键词： rice (Oryza safiva) early generation stability stable line genetic analysis

Spontaneous remission of Pneumocystisjiroveci pneumonia in 2 non-AIDS immunocompromised patients

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2013年第1期126卷 184-185页

作者： MU Xiang-dong WANG guang-fa MA Jing ZHANG Cheng SU li CHEN Jian Department of Respiratory Medicine Peking University FirstHospital Beijing 100034 China

Pneumocystis jiroveci （P. jiroveci） pneumonia （PCP） in non-AIDS immunocompromised patients ismuch more critical than that in AIDS patients,1 Without treatment, mortality of PCP in immunocompromised patients approaches 100 percent, and there were no reports of spontaneous remissions of PCP without anti-PCP therapy.2 Here we report 2 non-AIDS immunocompromised patients in whom PCP developed and remitted without treatment.

关键词： Pneumocystis jiroveci pneumonia non-AIDS immunocompromised patients spontaneous remission

Age-dependent changes of total and differential white blood cell counts in children

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2020年第16期133卷 1900-1907页

作者： Kun li Ya-guang Peng Ruo-Hua Yan Wen-Qi Song Xiao-Xia Peng Xin Ni Center for Clinical Epidemiology and Evidence-based Medicine Beijing Children’s HospitalCapital Medical UniversityNational Center for Children HealthBeijing 100045China Department of Epidemiology and Health Statistics School of Public HealthCapital Medical UniversityBeijing 100069China Department of Clinical Laboratory Center Beijing Children’s HospitalCapital Medical UniversityNational Center for Children HealthBeijing 100045China Beijing Key Laboratory for Pediatric Diseases of Otolaryngology Head and NeckSurgeryBeijing Children’s HospitalCapital Medical UniversityNational Center for Children HealthBeijing 100045China

Background:Total and differential white blood cell counts are important for the diagnostic evaluation of suspected *** facilitate the interpretation of total and differential white blood cell counts in pediatric patients,the present study investigated agedependent changes in total and differential white blood cell counts in healthy reference ***:Data were obtained from the Pediatric Reference Intervals in China study(PRINCE),which aims to establish and verify pediatric reference intervals for Chinese children based on a nationwide multicenter cross-sectional study from January 2017 to December *** curves were calculated using the generalized additive models for location,shape,and scale *** 2.5th,50th,and 97.5th quantile curves were calculated for both total and differential white blood *** of stacked area charts were used to demonstrate the proportions of differential white blood *** statistical analyses were performed using R ***:Both 50th and 97.5th quantiles of total white blood cell count and monocyte count were highest at birth,then rapidly decreased in the first 6 months of life;relatively slow reduction continued until 2 years of *** lymphocyte count was low during infancy and increased to its highest level at 6 months of age;it then exhibited moderate and continuous reduction until approximately 9 years of *** pattern of neutrophil count changed with age in a manner opposite to that of lymphocyte ***,there were two inter-sections of lymphocyte count and neutrophil count during infancy and at approximately 5 years of age,based on locally weighted regression(LOESS)*** were no apparent age-related changes in eosinophil or basophil ***:These data regarding age-related changes in total and differential white blood cell counts can be used to assess the health of pediatric patients and guide clinical decisions.

关键词： Leukocyte count Trends Pediatrics Development Growth

A hiddenly high hepatitis C virus related liver disease burden among Chinese patients with non-liver disease complaints: A hospital based study from 2013 to 2017

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2018年第2期11卷 171-176页

作者： Hua-Ping Huang Guo-Sheng Yuan Yu-Chen Zhou Cheng-guang Hu Jun-Wei liu Shuai Yuan Yu-Rong Qiu Yi-Ping li Yong-Yuan Zhang Yuan-Ping Zhou Department of Infectious Diseases and Hepatology Unit Nanfang HospitalSouthern Medical University Department of Respiratory Diseases The First Affiliated Hospital of Hainan Medical University Department of Hepatobiliary Surgery Nanfang HospitalSouthern Medical University Laboratory Medicine Center Nanfang HospitalSouthern Medical University Institute of Human Virology and Key Laboratory of Tropical Disease Control of Ministry of Education Zhongshan School of MedicineSun Yat-sen University HBVtech

Objective: To determine the frequency of anti-HCV antibody positivity in patients with nonliver disease complaints, to explore whether anti-HCV positive patients had been properly advised and visited hepatologists for further assessments, and to investigate their clinical characteristics as well as the HCV treatment ***: A hospital based survey of nonliver disease patients with anti-HCV positive and their attending physicians was conducted to determine: *** the patients adequately advised of the implication of anti-HCV positive finding; *** what extent the patients were aware of potential chronic liver disease associated with HCV infection and whether they sought for further assessments and care of ***: A total of 295 294 non-liver disease patients were tested for anti-HCV antibody, and 2 778 of them were found to be positive(0.94%).However, only 45.10%(1 253/2 778) of the anti-HCV antibody(+) patients were referred to hepatologists and received HCV RNA *** addition, 34.10%(312/915) and 1.42%(13/915) of them had already advanced to cirrhosis and hepatocellular carcinoma(HCC), *** analysis showed that the patients who declined antiviral therapy were older, with lower education and lower income, possessed poorer knowledge on the risk of chronic hepatitis C, and had more severe liver ***, 65% of the surveyed physicians did not know the genotype-guided treatment duration suggested by the ***, 22% of the surveyed physicians did not know the standard assays for the diagnosis of HCV ***: Our findings highlight the challenge and hidden enormous burden of chronic HCV infection among patients with non-liver disease complaints in China.

关键词： China HCV Hepatitis C antibody Diagnosis Treatment status Survey

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

半敞开式白酒库泄漏事故火灾风险分析

消防科学与技术 2020年第1期39卷 58-61,66页

作者：翟东章光何明礼武汉理工大学安全科学与应急管理学院

运用PyroSim软件建立某大型半敞开式白酒库的单个防火分区的1∶1模型,考虑风速的影响,计算火灾发生后的温度场和热辐射场分布,并分析温度和热辐射对罐体及构筑物的影响。结果表明:无风条件下,泄漏点附近和顶棚均处于严重热暴露环境,罐... 详细信息

运用PyroSim软件建立某大型半敞开式白酒库的单个防火分区的1∶1模型,考虑风速的影响,计算火灾发生后的温度场和热辐射场分布,并分析温度和热辐射对罐体及构筑物的影响。结果表明:无风条件下,泄漏点附近和顶棚均处于严重热暴露环境,罐体和顶棚可能发生结构破坏。有风条件下,火焰烟气会得到一定冷却并能较快排放,事故储罐和顶棚的温度均有下降,但气流导致火源燃烧核心发生转移,泄漏点周边储罐遭受的火灾影响增大。热辐射场影响分析显示,现行标准中储罐间最小防火间距略显不足,建议在实际设计中将此距离增加到0.6D以上。

关键词：半敞开式白酒库火灾防火间距数值模拟

切换保留信道与新呼叫排队相结合的LEO星座通信系统信道分配方案研究

在线全文

学校读者我要写书评

暂无评论

通信学报 2006年第9期27卷 135-140页

作者：李广侠郦苏丹冯少栋解放军理工大学通信工程学院江苏南京210007 国防科技大学计算机学院湖南长沙410073

提出一种适用于LEO(低轨道)星座通信系统的信道分配方案。该方案为切换呼叫提供了保留信道,降低了切换呼叫的阻塞概率。同时,采取新呼叫排队策略抑制保留信道引起的新呼叫阻塞概率的恶化,如果正在进行的呼叫离开,队列中的新呼叫可以按... 详细信息

提出一种适用于LEO(低轨道)星座通信系统的信道分配方案。该方案为切换呼叫提供了保留信道,降低了切换呼叫的阻塞概率。同时,采取新呼叫排队策略抑制保留信道引起的新呼叫阻塞概率的恶化,如果正在进行的呼叫离开,队列中的新呼叫可以按照次序获得分配信道。结果表明,该方案可以显著降低切换呼叫阻塞概率,并使新呼叫阻塞概率得到改善。

关键词：卫星通信卫星星座信道切换

在线全文

学校读者我要写书评

暂无评论

门式放射性沾染检测系统设计

核电子学与探测技术 2009年第1期29卷 196-199页

作者：李明亮刘泰峰王广祥石家庄经济学院信息工程学院河北石家庄050031

为通过探测γ射线来检测人体放射性沾染的剂量,设计了以工控机为核心、最小可探测活度为37kBq(137Cs源)的门式检测系统。系统采用中断方式自启动,对头、肩、腰、膝和脚部位进行检测,可实现超标声光报警及超标部位提示。重点探讨了光电... 详细信息

为通过探测γ射线来检测人体放射性沾染的剂量,设计了以工控机为核心、最小可探测活度为37kBq(137Cs源)的门式检测系统。系统采用中断方式自启动,对头、肩、腰、膝和脚部位进行检测,可实现超标声光报警及超标部位提示。重点探讨了光电倍增管高压调节、前置放大和甄别电路、系统可靠性、标准性及系统抗干扰等问题。系统投入使用后,具有稳定、准确及高效的特点。

关键词： γ射线核污染检测工控机抗干扰