检索结果-南通市图书馆

图书馆 2007年第3期 74-76,95页

作者：符勤长沙学院图书馆湖南长沙410003

本文描述了美国俄克拉荷马大学图书馆编目部门的实践活动,对照国内图书馆的情形,阐明了在网络环境下,编目人员如何利用传统和现代编目技术提升在线目录质量,从而为读者提供更加优质的检索服务。

关键词：在线书目编目技术读者服务

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嵌入专业课程的信息素养教学案例分析

图书馆工作与研究 2011年第4期 89-92页

作者：符勤长沙学院图书馆

文章描述了美国西佛罗里达大学嵌入专业课程的信息素养教学和练习的案例,分析了该案例将信息素养与专业课程相融合,提升学生学术研究和信息素养能力的全过程。旨在对国内大学信息素养教育的开展有所参考和借鉴。

关键词：信息素养教育合作教学论文写作

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一类稠密图色唯一的充要条件

中北大学学报（自然科学版） 2013年第1期34卷 10-16页

作者：詹福琴乔友付河池学院数学系广西宜州546300

设n≥1,T(1,1,n,4,1)表示从Pn+1的两个端点分别引出两条长为1,1和4,1的路所得到的图.在图G伴随唯一当且仅当-G色唯一的基础上,利用图的特征标、伴随多项式的代数性质及最小实数根的规律,证明了一类稠密图T(1,1,n,4,1)色唯一的充要条件是... 详细信息

设n≥1,T(1,1,n,4,1)表示从Pn+1的两个端点分别引出两条长为1,1和4,1的路所得到的图.在图G伴随唯一当且仅当-G色唯一的基础上,利用图的特征标、伴随多项式的代数性质及最小实数根的规律,证明了一类稠密图T(1,1,n,4,1)色唯一的充要条件是n≠1,4,7.

关键词：伴随多项式伴随唯一色唯一特征标最小实数根

Case Report:A case of chylothorax treated curatively with Sapylin, a streptococcus preparation

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第12期8卷 885-887页

作者： XU Zhi-hao WANG Chun-fu ZHANG Yue-qin SHEN Hua-hao XU Feng Department of Respiratory Diseases the Second Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China

Chylothorax is an uncommon disease where fatty fluid accumulates within the chest cavity. Conservative manage- ment, including repeated thoracentesis or pleurodesis, seems to be suitable to most cases. Herein, we present a case of efficacious pleurodesis by intrapleural injection of Sapylin, a streptococcus preparation, for the treatment of chylothorax. A 52-year-old non-smoking female farmer was diagnosed as idiopathic chylothorax after we ruled out possible causes including chest trauma, lymphoma, lung cancer, filariasis, tuberculosis, and etc. Two-time intra-thoracic injection of 3 Klinische Einheit (KE) Sapylin achieved rapid and effective control of chylothorax with no severe side effects. Sapylin may facilitate pleurodesis by producing a strong inflammatory response.

关键词： Chylothorax Sapylin Streptococcus preparation

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基于化肥削减潜力及碳减排的小麦生产效率

中国环境科学 2018年第2期38卷 784-791页

作者：朱宁曹博秦富中国农业科学院农业经济与发展研究所北京100081

基于2004~2015年中国小麦主产省份的小麦生产投入产出数据,分析了中国小麦生产的化肥削减及碳减排潜力,并利用SBM模型和ML指数分别测算了小麦生产的环境效率和环境全要素生产率.结果显示:科学施肥条件下,主产省份小麦生产的化肥削减及... 详细信息

基于2004~2015年中国小麦主产省份的小麦生产投入产出数据,分析了中国小麦生产的化肥削减及碳减排潜力,并利用SBM模型和ML指数分别测算了小麦生产的环境效率和环境全要素生产率.结果显示:科学施肥条件下,主产省份小麦生产的化肥削减及碳减排潜力分别为51.66%、37.41%;化肥削减及碳减排条件下,小麦生产环境效率未降低,2004~2015年间平均的小麦生产环境效率为0.970,北方地区的小麦生产环境效率要低于南方地区,小麦生产的MLEFFCH指数、MLTECH指数、ML指数超过了1,大于化肥未削减、全碳排放条件下的MLEFFCH指数、MLTECH指数、ML指数,化肥削减及碳减排利于实际生产向最大产出迫近,以达到生产的帕累托最优状态.

关键词：化肥削减碳减排小麦环境效率环境全要素生产率

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混合所有制经济性质辨析

河南大学学报（社会科学版） 2016年第4期56卷 40-46页

作者：付钦太中共河南省委党校学习论坛编辑部河南郑州451000

混合所有制经济的性质问题是一个涉及基本经济制度以及"十三五"期间如何推进国有企业改革的大问题,亟须廓清。混合所有制与股份制既有联系又有区别。混合所有制经济的性质是由其资本结构和控股资本的所有制性质决定的,资本结构不同,控... 详细信息

混合所有制经济的性质问题是一个涉及基本经济制度以及"十三五"期间如何推进国有企业改革的大问题,亟须廓清。混合所有制与股份制既有联系又有区别。混合所有制经济的性质是由其资本结构和控股资本的所有制性质决定的,资本结构不同,控股资本的所有制性质不同,其性质自然也就不同。混合所有制经济的性质具有多样性特征,这决定了混合所有制经济的发展方向具有一定的不确定性。发展混合所有制经济将对基本经济制度产生深刻的影响。推进国有企业混合所有制改革须坚持基本经济制度,发挥国有经济的主导作用,以国有资本控股为主流。

关键词：混合所有制经济性质国有企业改革主导作用

Crystal Engineering of Co(Ⅱ) Metal-organic Frameworks Based on the Hydrolysis Product of Letrozole and Coligands

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Chinese Journal of Structural Chemistry 2019年第8期38卷 1266-1274页

作者： KANG Hai-Xia fu Yu-qin JU Feng-Yang WANG Yu-Fang LI Xiao-Ling LIU Guang-Zhen College of Food and Drug Luoyang Normal UniversityLuoyang471943China College of Chemistry and Chemical Engineering and Henan Key Laboratory of FunctionorientedPorous MaterialsLuoyang Normal UniversityLuoyang471943China

The cyanide groups of letrozole(1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole) were hydrolyzed into the carboxylic groups under alkaline conditions. Then the hydrolysis product(1-[bis(4-carboxylphenyl)methyl]-1,2,4-triazole, H2ltzda) reacted with Co(NO3)2·6H2O in the presence of different bipyridl-typed ligands under hydrothermal conditions. As a result, two new Co(Ⅱ) MOFs were obtained, formulated as [Co2(ltzda)2(bpp)2]n(1) and {[Co2(ltzda)2(bpy)]·4H2O}n(2)(bpp = 1,3-di(4-pyridyl)propane, bpy = 4,4’-bipyridine). Two MOFs have been characterized by single-crystal X-ray diffraction, thermogravimetric analysis and magnetic measure. 1 displays a 2D metal-organic framework containing wave layers and 2 shows a pillared-layer structure existing in a 2-fold interpenetrated mode.

关键词： letrozole Co(Ⅱ) metal-organic frameworks hydrolysis magnetic property coligand

Ultrafiltration of pumpkin polysaccharide enhanced by ultrasonic and electric field

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Ultrafiltration of pumpkin polysaccharide enhanced by ultras...

Iterative Learning Control for a Class of Linear Continuous-time Switched Systems with Fixed Initial Shifts

广东省生物物理学会2013年学术研讨会

作者： Di Zhao Bing Li Xiao-qin fu College of Light Industry and Food Sciences South China University of Technology

Ultrasonic and electric field were introduced into pumpkin polysaccharide ultrafiltration independently or *** of ultrasonic including ultrasonic power,frequency as well as temperature and pressure during ultrafiltration were investigated by inspecting their effects on permeation flux or rejection rate Then,effects of electric field including electric intensity and pulse frequency were investigated in the same *** last,effects of complex fields were *** results indicated that:(l)both the introduction ultrasonic and electric field could enhance ultrafiltration efficiency;(2)There were peak values of the enhancement of electric field,when electric intensity exceeded 625V/cm or pulse frequency exceeded 600Hz,ultrafiltration efficiency decreased;(3)A cooperation effect was observed when the complex field was introduced;(4)introducing physical fields contributed to reduction of ultrafiltration membrane contamination and recovery of permeation flux with following sequence: 8kHz ultrasonic +625V/cm electric field >40kHz ultrasonic +625V/cm electric field >625V/cm electric field >28kHz ultrasonic >650V/cm electric field >40kHz ultrasonic.

关键词：

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Communications in Mathematical Research 2018年第4期34卷 309-328页

作者： xu guang-zhao fu qin du li-li wu jian-rong yu peng-fei li yong School of Mathematics and Physics Suzhou University of Science and TechnologySuzhouJiangsu215009 不详

This paper deals with the problem of iterative learning control for a class of linear continuous-time switched systems in the presence of a fixed initial shift. Here, the considered switched systems are operated during a finite time interval repetitively. According to the characteristics of the systems, a PD-type learning scheme is proposed for such switched systems with arbitrary switching rules, and the corresponding output limiting trajectories under the action of the PD-type learning scheme are given. Based on the contraction mapping method, it is shown that this scheme can guarantee the outputs of the systems converge uniformly to the output limiting trajectories of the systems over the whole time interval. furthermore, the initial rectifying strategies are applied to the systems for eliminating the effect of the fixed initial shift. When the learning scheme is applied to the systems, the outputs of the systems can converge to the desired reference trajectories over a pre-specified interval. Finally, simulation examples illustrate the effectiveness of the proposed method.

关键词： iterative learning control switched system PD-type learning scheme fixed initial shift output limiting trajectory

Operando Converting BiOCl into Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate

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Nano-Micro Letters 2022年第7期14卷 263-278页

作者： Huai qin fu Junxian Liu Nicholas M.Bedford Yun Wang Joshua Wright Peng Fei Liu Chun Fang Wen Liang Wang Huajie Yin Dongchen Qi Porun Liu Hua Gui Yang Huijun Zhao Centre for Catalysis and Clean Energy Gold Coast CampusGriffith UniversityGold CoastQLD 4222Australia School of Chemical Engineering University of New South WalesSydneyNSW 2052Australia Department of Physics Illinois Institute of TechnologyChicagoIL 60616USA Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237People’s Republic of China Centre for Materials Science School of Chemistry and PhysicsQueensland University of TechnologyBrisbaneQLD 4001Australia

Bismuth-based materials(e.g., metallic, oxides and subcarbonate) are emerged as promising electrocatalysts for converting CO_(2) to formate. However, Bio-based electrocatalysts possess high overpotentials, while bismuth oxides and subcarbonate encounter stability issues. This work is designated to exemplify that the operando synthesis can be an effective means to enhance the stability of electrocatalysts under operando CO_(2)RR conditions. A synthetic approach is developed to electrochemically convert Bi^(O)Cl into Cl-containing subcarbonate(Bi_(2)O_(2)(CO_(3))_(x)Cl_(y)) under operando CO_(2)RR conditions. The systematic operando spectroscopic studies depict that BiOCl is converted to Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) via a cathodic potential-promoted anion-exchange process. The operando synthesizedBi_(2)O_(2)(CO_(3))_(x)Cl_(y) can tolerate-1.0 V versus RHE, while for the wet-chemistry synthesized pure Bi_(2)O_(2)CO_(3),the formation of metallic Bio occurs at-0.6 V versus RHE. At-0.8 V versus RHE, Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) can readily attain a FEHCOO-of 97.9%,much higher than that of the pure Bi_(2)O_(2)CO_(3)(81.3%). DFT calculations indicate that differing from the pure Bi_(2)O_(2)CO_(3)-catalyzed CO_(2)RR, where formate is formed via a *OCHO intermediate step that requires a high energy input energy of 2.69 eV to proceed, the formation of H COO-over Bi_(2)O_(2)(CO_(3))_(x)Cl_(y) has proceeded via a *COOH intermediate step that only requires low energy input of 2.56 eV.

关键词： Carbon dioxide reduction Chloride-containing bismuth subcarbonate Cathodic potential-promoted anion-exchange Stability