检索结果-南通市图书馆

Modeling of particle transp.rt and combustion phenomena in a large-scale circulating fluidized bed boiler using a hybrid Euler-Lagrange approach

引用

Particuo.o.y 2014年第5期12卷 29-40页

作者： Wojciech P.adamczyk Gabriel Wecel Marcin Klajny Pawel Ko.o.ub adam Klimanek Ryszard A.Bialecki Institute of Thermal Techno.o.y Silesian University ofTechnologyKonarskiego 2244-100 CliwicePoland Foster Wheeler Energia polska sp.z o.o. Staszica 3141-200 SosnowiecPoland

The constantly developing fiuidized combustion techno.o.y has become competitive with a conventional pulverized coal （PC） combustion. Circulating fluidized bed （CFB） boilers can be a good alternative to PC boilers due to their robustness and lower sensitivity to the fuel quality. However, appropriate engineering tools that can be used to model and optimize the construction and operating parameters of a CFB boiler still require development. This paper presents the application of a relatively novel hybrid Euler-Lagrange approach to model the dense gas-solid flow combined with a combustion process in a large-scale indus- trial CFB boiler. In this work, this complex flow has been resolved by applying the ANSYS FLUENT 14.0 commercial computational fluid dynamics （CFD） code. To accurately resolve the multiphase flow, the original CFD code has been extended by additional user-defined functions. These functions were used to control the boiler mass load, particle recirculation process （simplified boiler geometry）, and interphase hydrodynamic properties. This work was sp.it into two parts. In the first part, which is referred to as pseudo combustion, the combustion process was not directly simulated. Instead, the effect of the chemi- cal reactions was simulated by modifying the density of the continuous phase so that it corresp.nded to the mean temperature and composition of the flue gases, In this stage, the particle transp.rt was simu- lated using the standard Euler-Euler and novel hybrid Euler-Lagrange approaches, The obtained results were compared against measured data, and both models were compared to each other. In the second part, the numerical model was enhanced by including the chemistry and physics of combustion. To the best of the authors＇ knowledge, the use of the hybrid Euler-Lagrange approach to model combustion is a new engineering application of this model, In this work, the combustion process was modeled for air-fuel combustion. The simulation results were co

关键词： CFB Fluidization Combustion Particles Large boile rCFD

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Factors associated with irritable bowel syndrome symptoms in hemodialysis patients

引用

World Journal of Gastroentero.o.y 2011年第15期17卷 1976-1981页

作者： Bartosz Fiderkiewicz Alicja Rydzewska-Ro.o.owska Micha Myliwiec Magdalena Birecka Bozenna Kaczanowska Grazyna Rydzewska Andrzej Rydzewski Department of Internal Medicine Nephrology and Transplantation MedicineCentral Clinical Hospital of Ministry of Home Affairs 02-507Warsaw Poland Department of Nephro.o.y and Transp.antation Medicine MedicalUniversity 15-540 Bia ystok Poland niepubliczny zak ad opieki zdrowotnejdiaverum polska sp. z o.o. 02-325 Warsaw Poland Nzoz Centrum Dializa Sosnowiec Department Pruszków 05-800 Pruszków Poland Department of Internal Medicine andGastroentero.o.y Central Clinical Hospital of Ministry ofHome Affairs 02-507 Warsaw Poland Department of Surgical Research and Transp.antation Medicine Medical Research Centre Polish Academy of Sciences 02-106 WarsawPoland The Jan Kochanowski University of Humanities and Sciences Faculty ofHealth Studies 25-317 Kielce Poland

AIM: To investigate clinical characteristics associated with the presence of irritable bowel syndrome (IBS) symptoms in hemodialysis (HD) ***: This was a cross-sectional study. A questionnaire based on the Bowel Disease Questionnaire that records gastrointestinal symptoms was given to 294 patients in 4 dialysis centers. A total of 196 (67%) subjects returned the survey. A multivariable logistic regression model was used to identify factors significantly associated with IBS symptoms. RESULTS: Symptoms compatible with IBS were present in 27 (13.8%) subjects and independently associated with low post-dialysis serum potassium [oR = 0.258, 95% CI (0.075-0.891), P = 0.032], paracetamol use [oR = 3.159, 95% CI (1.214-8.220), P = 0.018], and Kidney Disease Quality of Life (KDQoL) cognitive function score [oR = 0.977, 95% CI (0.956-0.999), P = 0.042]. Univariate regressions were also performed and the reported significance is for multivariate analysis. No association was detected for age, gender, depressed mood, smoking (present or past), body mass index, albumin level, Kt/V, sodium preor post-dialysis level, change in potassium level during HD, pro.o. pump inhibitor or H2 blocker use, asp.rin use, residual diuresis, hepatitis B or C infection, diabetes mellitus, marital status and education level. CoNCLUSIoN: This study examined potential risk factors for symptoms compatible with IBS in HD patients and identified an association with paracetamol use, post-dialysis potassium level and KDQoL-cognitive function score.

关键词：血液透析肠道疾病综合症 logistic回归模型症状患者对乙酰氨基酚质子泵抑制剂

来源：

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

PBAI集团STRzELCE植物育种有限公司的冬春油菜品种选育（英文）

PBAI集团STRZELCE植物育种有限公司的冬春油菜品种选育（英文）

引用

第十二届国际油菜大会

作者： Henryk Wos Grzegorz Budzianowski Henryk Cichy zygmunt Nita Anna Fürguth Wieslawa Poplawska Janina Wos Iwona Bartkowiak-BrodaPlant Breeding ＆ Acclimatization Institute,Departament of oilseed Crops,ul.Strzeszynska 36,60-479 Poznan,Poland Ho.o.la Rolin Strzelce sp.z o.o.Grupa IHAR oddzia Bo.o.o 64-020 CzempińPoland （Plant Breeding Company Strzelce Ltd.Group PBAI-Division Borowo64-020 CzempińPoland） Ho.o.la Rolin Strzelce sp.z o.o.Grupa IHAR oddzia Mayszyn 66-400 Gorzów Wlkp.Poland （Plant Breeding Company Strzelce Ltd.Group PBAI-Division Mayszyn66-400 Gorzów Wlkp.Poland） Ho.o.la Rolin Strzelce sp.z o.o.Grupa IHAR oddzia Mayszyn 66-400 Gorzów Wlkp.Poland （Plant Breeding Company Strzelce Ltd.Group PBAI-Division Mayszyn66-400 Gorzów Wlkp.Poland） Ho.o.la Rolin Strzelce sp.z o.o.Grupa IHAR zakad Gówny Strzelce 99-307 StrzelcePoland （Plant Breeding Company Strzelce Ltd.Group PBAI-Headquarters99-307 StrzelcePoland） Plant Breeding ＆ Acclimatization Institute Departament of Oilseed Cropsul.Strzeszynska 3660-479 PoznanPoland Plant Breeding ＆ Acclimatization Institute Departament of Oilseed Cropsul.Strzeszynska 3660-479 PoznanPoland Plant Breeding Company Strzelce Ltd.Group PBAI ul.Gowna 2099-307 StrzelcePoland

Strzelce植物育种公司几十年的植物育种实践反映了古往今来油菜育种的趋势以及革新。油菜育种工作在两个育种部门实施-Bo.o.o（始于1949）和Malyszyn（始于20世纪70年代晚期）。PBC Strzelce和波兹南市油料作物遗传育种部门在育种及研... 详细信息

Strzelce植物育种公司几十年的植物育种实践反映了古往今来油菜育种的趋势以及革新。油菜育种工作在两个育种部门实施-Bo.o.o（始于1949）和Malyszyn（始于20世纪70年代晚期）。PBC Strzelce和波兹南市油料作物遗传育种部门在育种及研究方面的合作使几个开放授粉的杂交品种得到了发展和商业化应用:有常规的冬油菜品种-Jantar（1985）,Bolko（1989）,Mar（1991）,Leo（1993）,Po.o.1993）,Bor（1994）,Marita（1994）,Kana（1997）,Gara（1999）,Bosman（2002）,Bojan（2004）;冬油菜复合杂交品种-Mazur（2001）,Kaszub（2001）,Lubusz（2002）,Po.o.zanin（2002）;春油菜品种-Huzar（2004）,Markiz（2005）,Bios（2005）和春油菜复合杂交品种Margo（2000）。油菜育种的主要目标是培育高产的开放授粉杂交品种。农业和市场价值的进一步发展促使大量能够满足国内和欧盟种子市场需求的品种,这些需求主要与品质特性的改良和分化密切相关,如含油量,纤维与蛋白含量和脂肪酸组成。公司的化学实验室正在对以上参数进行品质分析。我们的组培实验室生产的双单倍体能够缩短培养工作并能培养遗传上一致的品系,特别是ogura杂交系统需要的恢复系。本文的目的就是展现近来育种工作的历史和成果。

关键词： oilseed rape Brassica napus breeding programme variety breeding method hybrids genetic distance

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：