检索结果-南通市图书馆

Facile Synthesis of Porous Carbon Nitride Spheres with Hierarchical Three-Dimensional Mesostructures for CO_(2) Capture

在线全文

学校读者我要写书评

暂无评论

Nano Research 2010年第9期3卷 632-642页

作者： Qiang Li Jianping Yang Dan Feng Zha.gxiong Wu Qingling Wu Sung Soo Park Cha.g-Sik ha.Dongyuan Zha. Department of Chemistry and Sha.gha. Key Laboratory of MolecularCatalysis and Innovative Materials Laboratory of Advanced MaterialsFudan UniversityShanghai 200433China Department of Polymer Science and Engineering Pusan National UniversityGeumjeong-guBusan 609-735Korea

Porous carbon nitride(CN)spheres with partially crystalline frameworks ha.e been successfully synthesized via a nanocasting approach by using spherical mesoporous cellular silica foams(MCFs)as a ha.d template,and ethylenediamine and carbon tetrachloride as *** resulting spherical CN materials ha.e uniform diameters of ca.4μm,hierarchical three-dimensional(3-D)mesostructures with small and large mesopores with pore diameters centered at ca.4.0 and 43 nm,respectively,a relatively high BET surface area of~550 m^(2)/g,and a pore volume of 0.90 cm^(3)/***-resolution transmission electron microscope(HRTEM)images,wide-angle X-ray diffraction(XRD)patterns,and Raman spectra demonstrate tha. the porous CN material ha. a partly graphitized *** addition,elemental analyses,X-ray photoelectron spectra(XPS),Fourier transform infrared spectra(FT-IR),and CO_(2) temperature-programmed desorption(CO_(2)-TPD)show tha. the material ha. a high nitrogen content(17.8 wt%)with nitrogen-containing groups and abundant basic *** hierarchical porous CN spheres ha.e excellent CO_(2) capture properties with a capacity of 2.90 mmol/g at 25℃and 0.97 mmol/g at 75℃,superior to those of the pure carbon materials with analogous *** can be mainly attributed to the abundant nitrogen-containing basic groups,hierarchical mesostructure,relatively high BET surface area and stable ***,the presence of a large number of micropores and small mesopores also enha.ce the CO_(2) capture performance,owing to the capillary condensation effect.

关键词： Mesoporous materials carbon nitride nanocasting sphere ha.d template CO_(2)capture

Design of Si-Bipolar Monolithic IC for Optical Receivers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design of Si-Bipolar Monolithic IC for Optical Receivers

High prevalence of osteoporosis in patients with gastric adenocarcinoma following gastrectomy

Electronic Communication Systems--The 2000 IEEE Asia-Pacific Conference on Circuits and Systems

作者： Yaqi Zha.g Hongmin Zha. Qinani Lin Kwang sub Yoon School of Electronic Information Engineering Tianjin University Datang Telecom Technology Co.Ltd. Microelectronics Company Dept.of Electronic Engineering Inha University

ISBN: (纸本)0780362535

＜正＞Optical receiver is a major part of optical communication *** research and design of monolithic integrated circuit for optical receiver with Sibipolar transistors and emitter-coupled pair circuits of bipolar transistors in this *** is worthy of increasing the bit-rate and capacity,improving the systemic performance and reducing the device size and cost in future.

关键词： integrated optoelectronics bipolar integrated circuits optical receivers elemental semiconductors silicon bipolar monolithic IC optical receivers emitter-coupled pair circuits bit-rate capacity system performance device size Si

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

World Journal of Gastroenterology 2007年第48期13卷 6492-6497页

作者： Jung sub Lim Sang Bum Kim Ho-Yoon Bang Gi Jeong Cheon Jong-Inn Lee Department of Pediatrics Korea Cancer Center Hospital Department of Surgery Korea Cancer Center Hospital Department of Nuclear Medicine Korea Cancer Center Hospital

AIM： To evaluate the prevalence and predictive factors of osteoporosis in patients with gastric adenocarcinoma alter gastrectomy.METHODS： The study included 133 patients diagnosed with gastric adenocarcinoma but who did not undergo prior diagnostic work-up for osteoporosis. Bone mineral density （BMD） was measured by dual-energy X-ray absorptiometry （DXA） and vertebral deformity was assessed by plain X-rays. We evaluated the effects of age, sex, body mass index （BMI）, anemia, back pain, vertebral deformity, tumor staging, reconstruction type, and past medical history to determine predictive factors of osteoporosis in these patients.RESULTS： The prevalence of osteoporosis in the lumbar spine was 38.3% （male, 28.9%; female, 54.0%）, and 15.0% in the femoral neck （male, 10.8%; female, 22.0%）. The vertebral deformity rate was 46.6% （male, 43.4%; female, 52.0%）. Age, BMI and hemoglobin correlated with BMD （P 〈 0.01）. In males, anemia and age 〉 64 years were independent predictive factors of osteoporosis in multivariate analysis. In females, back pain was an independent factor for osteoporosis.CONCLUSION： The results of this study revealed tha. prevalence of osteoporosis and vertebral bone deformity rate were high in gastric cancer patients, regardless of post-gastrectomy duration and operation type. Early diagnosis and a proper management plan must be established in these patients.

关键词： Gastric adenocarcinoma Gastrectomy Bone mineral density Osteoporosis Vertebral deformity Anemia Back pain

Forecast Guidance for Thunder and Lightning of Jeolla Province during Summer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Forecast Guidance for Thunder and Lightning of Jeolla Provin...

Voxel-based statistical analysis of regional cerebral glucose metabolism in children with attention-deficit hyperactivity disorder

第27届中国气象学会年会灾害天气研究与预报分会场

作者： Forecaster Sim An sub Yang Pil ho Kim Moon yong Gwangju Regional Meteorological Administration

We studied the thunder and lightning in order to create the Guidance which will be used to decide whether to issue the thunder and lightning forecast on the overall weather condition or forecast sheets when atmospheric instability is *** made a close analysis of 22 cases of the thunder and lightning in 2007 about stability,lower water vapor advection,lower jet,500hPa vorticity and upper *** analysis ha. found tha. if the condition of atmospheric stability and lower moisture flux convergence are met（prerequisite） and more tha. one of the conditions among the rest of the lower jet,500hPa positive vorticity and upper divergence are met,a possible occurrence of the thunder and lightning is high.

关键词：

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

Neural Regeneration Research 2011年第36期6卷 2850-2855页

作者： Ji-Hoon Kim Young-In Chung Jung sub Lee In-Joo Kim Yong-Ki Kim Seong-Jang Kim Division of Child-Adolescent Psychiatry Department of Psychiatry Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Medical Research Institute Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Department of Psychiatry Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Department of Orthopedic Surgery Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea Department of Nuclear Medicine Pusan National University School of Medicine Yangsan-si Gyeongnam Republic of Korea

The technique of region of interest-based positron emission tomography is limited by its poor reli-ability and relatively few examined brain regions. In the present study, we compared brain metabo-lism assessed using fluorine-18-fluorodeoxyglucose positron emission tomography between 14 at-tention-deficit hyperactivity disorder （ADHD） patients and 15 normal controls with scoliosis at resting state by statistical parametric mapping. Glucose metabolism was decreased in the left parahippo-campal gyrus, left hippocampus, left anterior cingulate gyrus, right anterior and posterior lobes of the cerebellum, left superior temporal gyrus, left insula, left medial and middle frontal gyri, right medial frontal gyrus, and left basal ganglia （putamen, amygdala, and caudate nucleus） in children with ADHD. These data suggest tha. children with ADHD exhibit hypometabolism in various brain regions compared to controls, indicating tha. ADHD symptoms are unlikely the result of abnormalities in specific areas.

关键词： attention-deficit hyperactivity disorder positron emission tomography statistical parametric mapping

Validation of the TASS/SMR-S Code for the Core Heat Transfer Model on the Steady Experimental Conditions

在线全文

学校读者我要写书评

暂无评论

Journal of Energy and Power Engineering 2012年第3期6卷 338-345页

作者： In sub Jun Kyoo Hwan Bae Young Jong Chung Won Jae Lee Korea Atomic Energy Research Institute Daejeon 305-353 Korea

The SMART （System-integrated Modular Advanced ReacTor） which is a 330 MWt advanced integral PWR was developed by the KAERI （Korea Atomic Energy Institute） for electricity generation and seawater desalination. To enha.ce its safety, the various design concepts were adopted such as the most containing of the RCS （reactor coolant system） components and a PRHRS （passive residual heat removal system）. To ensure the safety and performance of the SMART, a thermal hydraulic evaluation and safety analysis are performed by the TASS/SMR-S code. It uses a one dimensional node/path modeling and point kinetics for the core power simulation. The code also ha. specific models reflecting the design features of the SMART such as a helical tube and PRHRS heat transfer models. In this study, the validation of the core heat transfer model in the TASS/SMR-S code on the steady conditions was performed with the Bennett＇s heated tube tests and THTF （thermal hydraulic test facility） experiment. From the results of the TASS/SMR-S code calculation, the CHF （critical heat flux） point and the fuel rod surface temperature were predicted conservatively compared to the test results.

关键词： SMART TASS/SMR-S code core heat transfer model Bennett tube test THTF experiment.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

编制秦沈客运专线列车运行图分析

铁道运输与经济 2003年第3期25卷 29-31页

作者：韩冰沈阳铁路分局营销分处辽宁沈阳110002

通过分析秦沈客运专线与既有线列车运行图的主要区别,阐明和论述了在秦沈客运专线列车运行图的编制过程中,应重点解决的几个关键问题。并且对秦沈客运专线与既有线列车运行图的衔接问题进行了探讨,提出在客运专线开通初期,由于客流较小... 详细信息

通过分析秦沈客运专线与既有线列车运行图的主要区别,阐明和论述了在秦沈客运专线列车运行图的编制过程中,应重点解决的几个关键问题。并且对秦沈客运专线与既有线列车运行图的衔接问题进行了探讨,提出在客运专线开通初期,由于客流较小,能力富余,为方便旅客出行,拟采用集中与均衡相结合,适当预留备用线的运行图编制框架模式。

关键词：客运专线列车运行图铁路运输编制列车等级通过能力

在线全文

学校读者我要写书评

暂无评论

韩国的农村开发事业及其影响

东北亚论坛 2009年第2期18卷 91-98页

作者：金钟燮[韩] 江原大学地域经济学科韩国江原道三陟245-711

在产业化、城市化、国际化发展进程中,世界各国都存在三农问题。各国政府积极探讨三农问题的解决方法,采取了不同的政策措施。基于对国内外农村开发政策及其问题的考察和对韩国农村地区开发情况以及存在问题的考察,运用计量方法可以科... 详细信息

在产业化、城市化、国际化发展进程中,世界各国都存在三农问题。各国政府积极探讨三农问题的解决方法,采取了不同的政策措施。基于对国内外农村开发政策及其问题的考察和对韩国农村地区开发情况以及存在问题的考察,运用计量方法可以科学地分析韩国农村开发事业对地区的影响,从而提出推动农村社会发展的对策。计量分析结果显示,韩国农村开发事业的生产诱发效果2004年为3 733.572亿韩元、2005年为4 334.939亿韩元、2006年为2 068.79亿韩元,附加价值诱发效果2004年为2 000.827亿韩元、2005年达到2 322.832亿韩元、2006年为1 108.668亿韩元,表明该事业对地区的影响比较大。在今后的工作中,应该通过进一步促进开发事业,减少居民之间的冲突,提高居民生活质量,把韩国农村改造成为能给城市居民提供休闲娱乐的舒适空间。

关键词：韩国投入产出分析生产诱发效果附加价值诱发效果中长期支援计划

Preclinical Long-term Magnetic Resonance Imaging Study of Silymarin Liver-protective Effects

在线全文

学校读者我要写书评

暂无评论

Journal of Clinical and Translational Hepatology 2022年第6期10卷 1167-1175页

作者： Yeon Ji Cha. Hwon Heo Chul-Woong Woo Sang-Tae Kim Jae-Im Kwon Monica Young Choi Yu sub Sung Kyung Won Kim Jeong Kon Kim Yoonseok Choi Dong-Cheol Woo Department of Convergence Medicine Asan Medical CenterUniversity of Ulsan College of MedicineSeoulRepublic of Korea Convergence Medicine Research Center Asan Institute for Life SciencesAsan Medical CenterSeoulRepublic of Korea Clinical Research Center Asan Medical CenterSeoulRepublic of Korea Department of Radiology Asan Medical CenterUniversity of Ulsan College of MedicineSeoulRepublic of Korea Medical Research Institute Gangneung Asan HospitalGangneung-siGangwon-doRepublic of Korea

Background and Aims:Efficacy evaluations with preclini-cal magnetic resonance imaging(MRI)are uncommon,but MRI in the preclinical pha.e of drug development provides information tha. is useful for longitudinal *** study aim was to monitor the protective effectiveness of silymarin with multiparameter MRI and biomarkers in a thioacetamide(TAA)-induced model of liver injury in *** analysis was conducted to assess compare the monitoring of liver function by MRI and ***-ods:TAA was injected three times a week for 8 weeks to generate a disease model(TAA group).In the TAA and sily-marin-treated(TAA-SY)groups,silymarin was administered three times weekly from week *** images were acquired at 0,2,4,6,and 8 weeks in the control,TAA,and TAA-SY ***:The area under the curve to maximum time(AUCtmax)and T_(2)*values of the TAA group decreased over the study period,but the serological markers of liver abnormality increased significantly more tha. those in the control *** the TAA-SY group,MRI and serological biomarkers indicated attenuation of liver function as in the TAA ***,pattern cha.ges were observed from week 6 to comparable levels in the control group with si-lymarin *** correlations between either AUCtmax or T_(2)*values and the serological biomarkers were ***:Silymarin ha. hepatoprotective effects on TAA-induced liver injury and demonstrated the usefulness of multiparametric MRI to evaluate efficacy in preclinical studies of liver drug development.

关键词： Liver fibrosis Magnetic resonance imaging Silymarin T1-weight-ed dynamic contrast-enha.ced T_(2)*