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Ternary Ag/AgCl/BiOIO_3 composites for enhanced visible-light-driven photocatalysis 被引量:13
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作者 熊婷 张会均 +1 位作者 张育新 董帆 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2015年第12期2155-2163,共9页
Ternary Ag/AgC l/BiO IO3 composite photocatalysts are prepared by a facile method. Enhanced visible-light absorption and charge carrier separation are achieved after the introduction of Ag/AgC l particles into BiO IO3... Ternary Ag/AgC l/BiO IO3 composite photocatalysts are prepared by a facile method. Enhanced visible-light absorption and charge carrier separation are achieved after the introduction of Ag/AgC l particles into BiO IO3 systems,as revealed by ultraviolet-visible diffuse-reflectance spectrometry,photocurrent response and electrochemical impedance spectroscopy. The Ag/AgC l/BiO IO3 composites are applied to the visible-light photocatalytic oxidization of NO in air and exhibit an enhanced activity for NO removal in comparison with Ag/AgC l and pure BiO IO3. A possible photocatalytic mechanism for Ag/AgC l/BiO IO3 is proposed,which is related to the surface plasmon resonance effects of Ag metal and the effective carrier separation ability of BiO IO3. This work provides insight into the design and preparation of BiO IO3-based materials with enhanced visible-light photocatalysis ability. 展开更多
关键词 Ag/AgCl/BiOIO3 Ternary composite Visible-light photocatalysis Nitrogen oxide removal Charge seperation
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Remote Sensing and GIS as an Advance Space Technologies for Rare Vegetation Monitoring in Gobustan State National Park, Azerbaijan 被引量:1
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作者 Yelena M. Gambarova Adil Y. Gambarov +1 位作者 Rustam B. Rustamov Maral H. Zeynalova 《Journal of Geographic Information System》 2010年第2期93-99,共7页
This paper describes remote sensing methodologies for monitoring rare vegetation with special emphasis on the Image Statistic Analysis for set of training samples and classification. At first 5 types of Rare Vegetatio... This paper describes remote sensing methodologies for monitoring rare vegetation with special emphasis on the Image Statistic Analysis for set of training samples and classification. At first 5 types of Rare Vegetation communities were defined and the Initial classification scheme was designed on that base. After preliminary Statistic Analysis for training samples, a modification algorithm of the classification scheme was defined: one led us to creating a 4 class’s scheme (Final classification scheme). The different methods analysis such as signature statistics, signature separability and scatter plots are used. According to the results, the average separability (Transformed Divergence) is 1951.14, minimum is 1732.44 and maximum is 2000 which shows an acceptable level of accuracy. Contingency Matrix computed on the results of the training on Final classi- fication scheme achieves better results, in terms of overall accuracy, than the training on Initial classification scheme. 展开更多
关键词 REMOTE SENSING GIS seperability Classification
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A review on pharmacological and analytical aspects of diosgenin:a concise report 被引量:4
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作者 Kanika PATEL Manoj GADEWAR +1 位作者 Vijay TAHILYANI Dinesh Kumar PATEL 《Natural Products and Bioprospecting》 CAS 2012年第2期46-52,共7页
Diosgenin is a steroidal sapogenin found in plants such as Dioscorea nipponoca,Solanum incanum,Solanum xanthocarpum and Trigonella foenum graecum.Diosgenin,biologically active phytochemicals have been used for the tre... Diosgenin is a steroidal sapogenin found in plants such as Dioscorea nipponoca,Solanum incanum,Solanum xanthocarpum and Trigonella foenum graecum.Diosgenin,biologically active phytochemicals have been used for the treatment of various types of disorder such as leukemia,inflammation,hypercholesterolemia and cancer.It is also able to prevent bone loss to the same extent as that of oestrogen.It is a typical initial intermediate for synthesis of steroidal compounds,oral contraceptives and sex hormones.Dioscorea,Costus and Trigonella are mainly used for the production of diosgenin.On the basis of literature survey it divulges that diosgenin has very impressive pharmacological profile and could be used as a medicine for the treatment of different types of disorders in the future.Thus,the present work aims to provide collective information in concern with its pharmacological activity and phytoanalytical techniques.This review will be beneficial to researches for the development of an alternative method for the treatment of innumerable diseases from diosgenin. 展开更多
关键词 analytical techniques cancer DIOSGENIN pharmacological activity plant source seperation techniques
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Hausdorff Measure of Linear Cantor Set 被引量:3
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作者 MaChao 《Wuhan University Journal of Natural Sciences》 EI CAS 2004年第2期135-138,共4页
We study the Hausdorff measure of linear Cantor setE, on the unit interval, under the strong seperated condition. We give a necessary and sufficient condition for ?(E)=∣E∣° by using the contracting ratio and th... We study the Hausdorff measure of linear Cantor setE, on the unit interval, under the strong seperated condition. We give a necessary and sufficient condition for ?(E)=∣E∣° by using the contracting ratio and the first gap. This condition is easy to use. Key words linear Cantor set - Hausdorff measure - strong seperated condition CLC number O 174. 12 Foundation item: Supported by the National Natural Science Foundation of China (10171028)Biography: Ma Chao (1975-), male, Ph. D. candidate, research direction: fractal geometry. 展开更多
关键词 linear Cantor set Hausdorff measure strong seperated condition
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SEPARATION OF MATERIALS IN SWIRL SHAFT PREHEATER
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作者 朱明 曲祖源 邱树恒 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 1996年第3期53-61,共9页
On the basis of theoretical analysis and cold model test, the material motion locus and the particle size which can be separated in the swirl shaft preheater was stud-ied. A new calculation method for separation effic... On the basis of theoretical analysis and cold model test, the material motion locus and the particle size which can be separated in the swirl shaft preheater was stud-ied. A new calculation method for separation efficiency based on the meterial size distribution curve of charge and dis-charge stock from the shaft is discussed in this paper. The ex-perimental results show the material separation is due to in-teraction of both the centrifugation and the gravity. When the inlet gas velocity is a constant, the separation efficiency will be raised as the load of batch feeding inreases. If the load of batch feeding is a constant, the separation efficiency will be decreased together with the elevation of the inlet gas. The loss of shaft resistence is increased when the separation effi-ciency is raised. In our experiment the suitable separation ef-ficiency of the shaft is about 70 percent. 展开更多
关键词 swirl shaft material size distribution load of batch feeding seperation efficiency'
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Separated Same Rectangle Feature for Face Detection
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作者 Yong-hee HONG Hwan-ik CHUNG Hem-soo HAHN 《Journal of Measurement Science and Instrumentation》 CAS 2010年第2期121-124,共4页
The paper proposes a new method of "Separated Same Rectangle Feature (SSRF)" for face detection. Generally, Haar-like feature is used to make an Adaboost training algorithm with strong classifier. Haar-like featur... The paper proposes a new method of "Separated Same Rectangle Feature (SSRF)" for face detection. Generally, Haar-like feature is used to make an Adaboost training algorithm with strong classifier. Haar-like feature is composed of two or more attached same rectangles. Inefficiency of the Haar-like feature often results from two or more attached same rectangles. But the proposed SSRF are composed of two separated same rectangles. So, it is very flexible and detailed. Therefore it creates more accurate strong classifier than Haar-like feature. SSRF uses integral image to reduce execuive time. Haar-like feature calculates the Sanl of intmsities of pixels on two or more rectangles. But SSRF always calculates the stun of intensities of pixels on only two rectangles. The weak classifier of Ariaboost algorithm based on SSRF is fastex than one based on Haar-like feature. In the experiment, we use 1 000 face images and 1 000nm- face images for Adaboost training. The proposed SSRF shows about 0.9% higher acctwacy than Haar-like features. 展开更多
关键词 seperated same rectangle feature Haar-like discreteadaboost FEATURE
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RESEARCH ON MATCH BETWEEN PRESSURE AND DELIVERY OF A PUMP IN THE TECHNOLOGY OF GROUTING INTO SEPERATED STRATA
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作者 赵德深 隋会权 +3 位作者 刘文生 苏仲杰 范学理 杨逾 《Journal of Coal Science & Engineering(China)》 1997年第2期57-61,共5页
Based on hydromachanics and the law of conservation of energy by means of the Bernoulli Equation, the matching relation of a pump pressure and delivery, losing energy of the magma when it flows along the pipes are res... Based on hydromachanics and the law of conservation of energy by means of the Bernoulli Equation, the matching relation of a pump pressure and delivery, losing energy of the magma when it flows along the pipes are researched. This thesis provide the theoretical basis for equipment selection and selection of pipeline. 展开更多
关键词 conservation of momentum grouting into seperated strata the matching relation between pump pressure and delivery
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Facile and Green Synthesis of α,β-Unsaturated Ketone Catalyzed by Air-Stable Organobismuth Complex
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作者 Renhua Qiu Yimiao Qiu +5 位作者 Zhengong Meng Xingxing Song Zhenyong Jia Shuangfeng Yin Chak- Tong Au Wai-Yeung Wong 《Advances in Materials Physics and Chemistry》 2012年第4期142-145,共4页
Air-stable cationic organobismuth complexes (2-5) possessing both acidic and basic characters were synthesized. The catalyst system that comprises an air-stable bifunctional Lewis acidic/basic organobismuth complex an... Air-stable cationic organobismuth complexes (2-5) possessing both acidic and basic characters were synthesized. The catalyst system that comprises an air-stable bifunctional Lewis acidic/basic organobismuth complex and [Bmim]BF4 showed high catalytic activity, diastereoselec-tivity, stability, and reusability in the one-pot synthesis of (E)-α,β-unsaturat-ed ketones through highly selective crossed-condensation of ketones and aldehydes. Through switching the reaction from homogeneous to heterogeneous, the system shows facile separation ability and facile reusability. 展开更多
关键词 α β-Unsaturated KETONE CATALYSIS FACILE Seperation CATALYTIC System Organobismuth .Synthesis
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FEASIBILITY ANALYSIS OF SAFETY SIMULTANEOUS EXTRACTION OF COAL AND COALBED METHANE 被引量:2
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作者 李树刚 《Journal of Coal Science & Engineering(China)》 2000年第1期52-56,共5页
Coalbed methane is of great value to extract and utilize in China, but the result of such research is not satisfied yet today.The paper analyzed the storage characteristics of coalbed methane, and then studied the beh... Coalbed methane is of great value to extract and utilize in China, but the result of such research is not satisfied yet today.The paper analyzed the storage characteristics of coalbed methane, and then studied the behavior of coalbed methane using the key stratum theory of strata control.According to the features related to coalbed methane accumulations and delivery, the technique for safely simultaneous extraction of coal and coalbed methane is proposed, and benefit analysis is made too. 展开更多
关键词 simultaneous extraction key stratum theory bed seperated fissure methane drainage BENEFIT
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A Wordless Departure, an Everlasting Love
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作者 袁也 《海外英语》 2019年第14期245-246,共2页
John Donne,being famous for his use of metaphysical metaphors,is one of the most successful poets of the 17th century English.His metaphysical poem“A Valediction:Forbidding Mourning”plays a significant role during t... John Donne,being famous for his use of metaphysical metaphors,is one of the most successful poets of the 17th century English.His metaphysical poem“A Valediction:Forbidding Mourning”plays a significant role during the Renaissance.In his poems,the compass is compared to lovers,which becomes the classic love metaphor.This essay aims to analyze the discrepancy between the death at the beginning and the love’s constancylater,and how John Donne illustrates two groups of contrast:spiritual love and physical love,temporal love and eternal love. 展开更多
关键词 John Donne A Valediction Forbidding MOURNING Seperation LOVE
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下颌磨牙分根术后桩核皿字形烤瓷全冠修复效果
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作者 翁丽萍 李敏婕 《中国保健营养(下半月)》 2012年第2期90-91,共2页
目的:改善严重根分叉病变下颌磨牙的牙周适应性。方法:临床结合X片选择30例Ⅲ-Ⅳ°根分叉病变下颌磨牙,其中男24例,女6例。下颌第一磨牙28例,下颌第二磨牙2例,完善根管治疗两周后进行分根术处理,将根分叉区域形成自洁区,桩核修复调... 目的:改善严重根分叉病变下颌磨牙的牙周适应性。方法:临床结合X片选择30例Ⅲ-Ⅳ°根分叉病变下颌磨牙,其中男24例,女6例。下颌第一磨牙28例,下颌第二磨牙2例,完善根管治疗两周后进行分根术处理,将根分叉区域形成自洁区,桩核修复调整两分根的外形,使其尽量承受垂直向合力,观察4-6周后皿字型贵金属内冠烤瓷全冠修复,随访两年。结果:30例患牙患者主观感受良好,咀嚼功能正常,X片对比无恶化。结论:严重根分叉病变的下颌磨牙分根术后桩核皿字形贵金属内冠烤瓷全冠修复能提高病牙保存率,改善根分叉区牙周情况。 展开更多
关键词 分根术ROOT SEPERATION 桩核POST-CORES 贵金属皿字型内冠烤瓷全冠noble
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浅谈山西开国纪念铜币
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作者 张培林 《中国钱币》 北大核心 1993年第3期58-,30,共2页
浅谈山西开国纪念铜币张培林民国伊始,各省又纷纷铸币,孙中山先生深感铸币事关重大,遂于民国元年3月9日“临时大总统令”中指出,“查币制改良,新民耳目,自属要图……其余通用新币中间应绘五谷模型,取丰岁足民之义,垂劝农务本... 浅谈山西开国纪念铜币张培林民国伊始,各省又纷纷铸币,孙中山先生深感铸币事关重大,遂于民国元年3月9日“临时大总统令”中指出,“查币制改良,新民耳目,自属要图……其余通用新币中间应绘五谷模型,取丰岁足民之义,垂劝农务本之规。”所以民国初期,各省所铸开国纪念铜币,其基本图案多为嘉禾图和双族图,最初的“双旗”,为“十八星军旗”和五色国旗,其后改为国民党党旗和国民党政府旗。据史科记载,民初铸造开国纪念铜币的省份主要有:湖北(武昌造币厂)、江苏(南京造币厂)、安徽(安庆造币厂)、湖南(长沙造币厂)、河南(开封造币厂)及山西(太原造币厂)等①。但何为山西所铸开国纪念铜币,却不大清楚。笔者在铜元收集中,偶遇一品(图1),面值为“壹枚”,直径2.78厘米、厚0.15厘米、重6.5克,铜质略黄。虽品相不精,但图文均能清晰,正面中央铸竖读“壹枚”二字,左右嘉禾环绕;背面中央为双旗图,分别为十八星军旗和五色国旗,上缘铸“中华民国”,下缘铸“开国纪念币”,左右两侧为“卷草花”。笔者认为,此币应为山西所铸之开国纪念铜币,是山西机铸铜币的初铸品,铸造时间应在民国七年(1918)以后。理由有三:民初各地所铸开国纪念铜币。 展开更多
关键词 SUPERCRITICAL fluid extraction seperation of ETHANOL-WATER mixture PACKINGS ADDITIVE agent
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