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心之宽窄
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作者 群璐 《健康生活》 1997年第11期1-1,共1页
山有高矮,路有长短,心亦有宽窄乎? 是的。 虽然人心隔着肚皮,且人心的形状重量基本相同,可是从不同的言谈举止还是能够窥视出每个人心之宽窄的差别。 差别是明显的,甚至有天壤之别。
关键词 每个人 重量基 人人都 肚皮 死胡同 比喻 黄金 窄狭 海洋 写照
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Improved Keystroke Authentication Accuracy Based on Statistics and Weight 被引量:2
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作者 Li Jian Guo Xiaojing +1 位作者 Li Meiyun Li Ruifan 《China Communications》 SCIE CSCD 2012年第7期36-41,共6页
Abstract: In order to improve the recognition accuracy of key stroke authentication, a methodology based on feature extraction of keystroke sequence is presented in this paper. Firstly, the data of the users' keystr... Abstract: In order to improve the recognition accuracy of key stroke authentication, a methodology based on feature extraction of keystroke sequence is presented in this paper. Firstly, the data of the users' keystroke feature information that has too much deviation with the mean deviation is filtered out. Secondly, the probability of each input key is calculated and 10 values which do not have the best features are selected. Thirdly, they are weighed and a score evaluating the extent to which the user could be authenticated successfully is calculated. The benefit of using a third-party data set is more objective and comparable. At last, 展开更多
关键词 AUTHENTICATION BIOMETRICS keystroke dynamics
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Eukaryotic Promoter Recognition Using Back propagation Neural Network 被引量:1
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作者 XIONGQing WANGYuan-Qiang LIZhi-Liang 《Chinese Journal of Biomedical Engineering(English Edition)》 2004年第2期87-92,共6页
A new system is developed to recognize promoter sequences from non promoter sequences based on position weight matrix and backpropagation neural network in this paper. The system performs significantly better on the t... A new system is developed to recognize promoter sequences from non promoter sequences based on position weight matrix and backpropagation neural network in this paper. The system performs significantly better on the training set and the test set, the mean recognition rate is as high as 99% on the training set and 97% on the testing set. Experimental results demonstrate the effectiveness of the system to recognize the promoter sequences that have been trained and the promoter sequences that have not been seen previously. 展开更多
关键词 Eukaryotic promoter recognition BP neural network Position weight matrix
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Mechanism of Gravity Impulse
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作者 WU Ning 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第4X期639-642,共4页
It is well known that energy-momentum is the source of gravitational field. For a long time, it is generally believed that only stars with huge masses can generate strong gravitational field. Based on the unified theo... It is well known that energy-momentum is the source of gravitational field. For a long time, it is generally believed that only stars with huge masses can generate strong gravitational field. Based on the unified theory of gravitational interactions and electromagnetic interactions, a new mechanism of the generation of gravitational field is studied. According to this mechanism, in some special conditions, electromagnetic energy can be directly converted into gravitational energy, and strong gravitational field can be generated without massive stars. Gravity impulse found in experiments is generated by this mechanism. 展开更多
关键词 mechanism of generation of gravitational field gravity impulse quantum gravity unified theory of fundamental interactions
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Research on a Rapid Test Method of Dry Basis Weight of Paper-process Reconstituted Tobacco
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作者 Dandan SU Hua CHEN +4 位作者 Guangfei ZHAO Liran DING Wenjun ZHANG Jing LIU Guiyuan ZHOU 《Agricultural Science & Technology》 CAS 2017年第10期1948-1950,1978,共4页
This study aimed to optimize the rapid test factors of dry basis weight of reconstituted tobacco, in order to afford a reference test method for companies which produce reconstituted tobacco to better control the basi... This study aimed to optimize the rapid test factors of dry basis weight of reconstituted tobacco, in order to afford a reference test method for companies which produce reconstituted tobacco to better control the basis weight and coating ratio on line. The dry basis weight of reconstituted tobacco was tested by fast method and normal oven method individually. And the effects on the test values of different test factors such as temperature, time and the number of baking sheets were studied. Then the test values of these two methods were compared, so the proper factors of rapid test method were determined. As the baking temperature rose from 130 ℃ to 150 ℃, and the baking time rose from 1 min to 2 min, the difference between fast test method and normal oven method grew, and when the number of baking pieces rose from 3 pieces to 5 pieces, the difference between the two methods went down. The optimum test condition was baking temperature of 130 ℃, baking time of 1 min, and baking sample sheet number of 5. Under this condition, the value of fast test method was the closest to the test value of normal oven method, and meanwhile, the test factor was more proper for testing on line. The study will provide a reference for online controlling of dry basis weight and coating ratio of reconstituted tobacco. 展开更多
关键词 Reconstituted tobacco Rapid test method Dry basis weight Coating ratio
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Assessment of Trace Metal Contamination of Sediments in the Lubumbashi River Basin, Kafubu, Kimilolo and Kinkalabwamba Rivers in Lubumbashi City, Democratic Republic of Congo 被引量:1
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《Journal of Environmental Science and Engineering(A)》 2017年第4期167-177,共11页
Arsenic (As), Barium (Ba), Cadmium (Cd), Cobalt (Co), Chromium (Cr), Copper (Cu), Iron (Fe), Manganese (Mn), Lead (Pb) and Zinc (Zn) concentrations were investigated in sediments collected from six... Arsenic (As), Barium (Ba), Cadmium (Cd), Cobalt (Co), Chromium (Cr), Copper (Cu), Iron (Fe), Manganese (Mn), Lead (Pb) and Zinc (Zn) concentrations were investigated in sediments collected from sixteen sampling sites in the Lubumbashi river basin and five sites in Kafubu, Kimilolo and Kinkalabwamba rivers during February, March and April 2016. Analyses of the samples were carried out using a portable X-RFS (X-Ray Fluorescence Spectrometer). Water pH and OM (Organic Matter) content of the sediments were also determined. Trace metal toxicity risk to aquatic organisms was assessed using SQGs (Sediment Quality Guidelines)---TELs (Threshold Effect Levels) and PELs (Probable Effect Levels)---for freshwater sediments. Mean values ofpH and OM ranged from 4.2 to 7.8 and from 1.27% to 6.22%, respectively. The highest mean levels of trace metals in sediments were 5,438 mg·kg-1·dw and 902.5 mg·kg-1·dw for Cu and Co, respectively in Lubumbashi river 1.45 kilometer downward the Lubumbashi Slag heap, 1,534.5 mg·kg-1·dw and 342 mg·kg-1·dwdw for Zn and Pb, respectively at the confluence of Lubumbashi and Kafubu rivers, 108,900 mg·kg-1·dw, 547 mg·kg-1·dw and 174.5 mg·kg-1·dw for Fe, Ba and Cr, respectively in Kinkalabwamba river, 531 mg·kg-1·dw and 22 mg-kgl'dw for Mn and Cd, respectively in Kimilolo river, and 37 mg·kg-1·dw for As at the confluence of Tshondo and Lubumbashi rivers. The mean concentrations of As, Cd, Cr, Cu, Pb and Zn in the sediments exceeded the corresponding SQGs' PELvalues and could have adverse effects on aquatic organisms of those rivers. Trace metal contamination of the studied sediments might he partially attributed to natural processes, unplanned urbanization and poor waste management and mostly to abandoned and ongoing mining and ore processing activities in Lubumbashi city. 展开更多
关键词 Trace metals CONTAMINATION river sediments pH organic matter Lubumbashi city
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Mathematical Correlation for Tungsten-Based Alloy Nanopowder to Determine the Relation between Temperature Time and Weight under Certain Temperatures
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作者 Abdulsalam A. A. M. Alhazza 《Journal of Civil Engineering and Architecture》 2016年第11期1226-1235,共10页
High temperature treatment of tungsten alloy of W-5wt.% TM (transition metals, TM = Ni, Fe, Cu, Co) nanopowder was run under different temperatures to cover the oxidation rate at different temperatures. The correlat... High temperature treatment of tungsten alloy of W-5wt.% TM (transition metals, TM = Ni, Fe, Cu, Co) nanopowder was run under different temperatures to cover the oxidation rate at different temperatures. The correlation was developed for certain temperatures to find an equation for the relation between time and weight. The thermal treatment was done for different quantities at certain times. The proposed equation studies the correlation between temperature, time, and weight. For each temperature, a number of points were recorded from the measured oxidation curve. The shape of the curves is well-represented in this paper. The final results will present the highest temperature, the maximum weight, and the maximum time for full oxidation at high and low temperatures. 展开更多
关键词 Tungsten alloy transition metals NANOPOWDER OXIDATION correlation.
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Determination of Selected Toxic Elements in Apples from Organic Farming 被引量:1
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作者 Michaela Zeiner Iva Juranovic Cindric +1 位作者 Ivona Krizman Gerhard Stingeder 《Journal of Chemistry and Chemical Engineering》 2011年第7期577-582,共6页
Due to the elevated ecological awareness nowadays the consumption of products of organic agriculture is increasing. Organic farming means excluding the use of synthetic inputs, such as synthetic fertilizers and pestic... Due to the elevated ecological awareness nowadays the consumption of products of organic agriculture is increasing. Organic farming means excluding the use of synthetic inputs, such as synthetic fertilizers and pesticides or genetically modified organisms, but there are only a few regulations regarding heavy metal concentrations in soils. Thus a not negligible uptake of metals from the soil where the apple trees are grown may occur. Furthermore inorganic copper compounds being traditional fertilizers for apple trees are not considered as synthetic fertilizers, thus they are still used in organic apple farming for soil or foliar application. Thus also apples produced by organic agriculture may contain toxic elements, such as cadmium, chromium, copper, and lead. The concentrations of these elements were determined in whole apples, as well as in the flesh and peel in order to estimate the possible risk for human health. Prior to analysis using ICP-AES samples underwent a microwave assisted digestion. The LODs obtained are below the recommended maximum levels in vegetables/fruits by WHO. In all samples no Cu, Cr, and Pb could be detected. Only Ca was found in the peel of about a third of samples investigated in concentrations between LOD and LOQ (1-3 μg/g). 展开更多
关键词 Apples CADMIUM CHROMIUM copper LEAD organic farming.
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An entropy-based multi-criterion group decision analysis method of selecting the optimum weak-subgrade treatment
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作者 罗君君 《Journal of Chongqing University》 CAS 2008年第3期191-197,共7页
Proper treatment of weak subgrade soil is very important to building a highway of good quality. We proposed an entropy-based multi-criterion group decision analysis method for a group of experts to evaluate alternativ... Proper treatment of weak subgrade soil is very important to building a highway of good quality. We proposed an entropy-based multi-criterion group decision analysis method for a group of experts to evaluate alternatives of weak subgrade treatment, with an aim to select the optimum technique which is technically, economically and socially viable. We used fuzzy theory to analyze multiple experts' evaluation on various factors of each alterative treatment. Different experts' evaluations are integrated by the group eigenvalue method. An entropy weight is introduced to minimize the negative influences of subjective human factors of experts. The optimum alternative is identified with ideal point diseriminant analysis to calculate the distance of each alternative to the ideal point and prioritize all alternatives according to their distances. A case study on a section of the Shiman Expressway verified that the proposed method can give a rational decision on the optimum method of weak subgrade treatment. 展开更多
关键词 highway engineering weak subgrade treatment decision making entropy weight group eigenvalue method
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Nuclear ?eld shift effects on stable isotope fractionation: a review 被引量:7
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作者 Sha Yang Yun Liu 《Acta Geochimica》 EI CAS CSCD 2016年第3期227-239,共13页
An anomalous isotope effect exists in many heavy element isotope systems (e.g., Sr, Gd, Zn, U). This effect used to be called the "odd--even isotope effect" because the odd mass number isotopes behave differently ... An anomalous isotope effect exists in many heavy element isotope systems (e.g., Sr, Gd, Zn, U). This effect used to be called the "odd--even isotope effect" because the odd mass number isotopes behave differently from the even mass number isotopes. This mass-indepen- dent isotope fractionation driving force, which originates from the difference in the ground-state electronic energies caused by differences in nuclear size and shape, is cur- rently denoted as the nuclear field shift effect (NFSE). It is found that the NFSE can drive isotope fractionation of some heavy elements (e.g., Hg, T1, U) to an astonishing degree, far more than the magnitude caused by the con- ventional mass-dependent effect (MDE). For light ele- ments, the MDE is the dominant factor in isotope fractionation, while the NFSE is neglectable. Furthermore, the MDE and the NFSE both decrease as temperatures increase, though at different rates. The MDE decreases rapidly with a factor of 1/T2, while the NFSE decreases slowly with a factor of 1/T. As a result, even at high temperatures, the NFSE is still significant for many heavy element isotope systems. In this review paper, we begin with an introduction of the basic concept of the NSFE, including its history and recent progress, and follow with the potential implications of the inclusion of the NFSE into the kinetic isotope fractionation effect (KIE) and heavy isotope geochronology. 展开更多
关键词 Isotope fractionation Mass-dependent effect.Nuclear field shift effect. Mass-independent fractionation Nuclear volume effect Nuclear shape effect
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Influence of ultrasonic on the coking amount of catalyst (Ni/γ-Al2O3) for the dry reforming of benzene
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作者 杨国来 陈汉平 +1 位作者 米铁 冯波 《Journal of Coal Science & Engineering(China)》 2007年第1期79-84,共6页
The Influence of ultrasonic treatment on the coking amount of a nickel-based catalyst (Ni/γ-Al2O3) for the reaction of reforming with carbon dioxide of Benzene was investigated. The results show that ultrasonic tre... The Influence of ultrasonic treatment on the coking amount of a nickel-based catalyst (Ni/γ-Al2O3) for the reaction of reforming with carbon dioxide of Benzene was investigated. The results show that ultrasonic treatment modify the pore size distribution of the catalysts significantly and also reduce the amount of coke formed on the catalyst. The reduction in the coking amount is not sensitive to the power output of the ultrasonic treatment device in the power range tested (120 W and 500 W). 展开更多
关键词 Ni/γ-Al2O3 ultrasonic treatment COKING benzene reforming
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Language Switching Based on Cognitive Interference Task and Its Teaching Implication for Consecutive Interpreting
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作者 SUI Dan-ni CHEN Zheng 《Sino-US English Teaching》 2014年第12期940-944,共5页
An empirical study was addressed to explore the language switching selection based on conflict resolution task between bilinguals and monolinguals. The Double-Source interference task was designed to investigate the i... An empirical study was addressed to explore the language switching selection based on conflict resolution task between bilinguals and monolinguals. The Double-Source interference task was designed to investigate the interaction of attentional network and bilingual's language conflict resolution capacity. ANOVA for repeated measurement was used to measure the main effect of different attentional networks. The response time of alerting network was significant faster than that of executive network. There was also a significant main effect of different groups of subjects that bilinguals responded faster than monolinguals when operating alerting and executive network. Language switching paradigm can be used to interpret the neuro-cognitive process of oral consecutive interpreting, so the teaching implication will be discussed in the present study. 展开更多
关键词 BILINGUALISM language switching conflict resolution INTERPRETING
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INTRODUCTION OF THE HIGH THROUGHPUT SCREENING SYSTEM
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作者 李元 《Chinese Medical Sciences Journal》 CAS CSCD 2001年第3期179-181,共3页
In this article, we introduce the system of high throughput screening (HTS). Its role in new drug study and current development is described. The relationship between research achievements of genome study and new type... In this article, we introduce the system of high throughput screening (HTS). Its role in new drug study and current development is described. The relationship between research achievements of genome study and new type screening model of new drugs is emphasized. The personal opinions of current problems about HTS study in China are raised. 展开更多
关键词 high throughput screening new drug screening recombinant protein target automatic analysis
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Corncobs as Substrate for Oleaginous Yeast-Pretreatment via Steam Explosion and Hydrolysis
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作者 Heike Kahr Manuel Pointner KlausKrennhuber Daniel Steindl AlexanderJager 《Journal of Environmental Science and Engineering(A)》 2015年第7期359-366,共8页
Corn cobs are a promising lignocellulosic substrate for the production of biofuels like bioethanol via conventional yeast or biodiesel via oleaginous yeast. Pretreatment of the substrate is essential for further hydro... Corn cobs are a promising lignocellulosic substrate for the production of biofuels like bioethanol via conventional yeast or biodiesel via oleaginous yeast. Pretreatment of the substrate is essential for further hydrolysis and fermentation steps. This study focused on the steam explosion method as pretreatment. Therefore, different steam explosion severities were evaluated. The content of glucan, xylan and Klason lignin was examined. Xylan degraded with increasing severity from 412.7 g·kg-1 (untreated) to a minimum of 127.3 g-kg1 dry matter (190 ℃/30 min). Glucan concentrations increased from 315.1 g·kg1 (untreated) to a maximum of 371.6 g·kg-1 dry matter (200 ℃/20 min). For soluble lignin, an increase could be observed at rising severity, from 145.3 g·kg-l (untreated) to a maximum of 214.9 g·kg-1 dry matter (190 ℃/30 min). Furthermore, the mass recovery was calculated. At harsher pretreatment conditions, a significant mass loss was observed, estimated by the ash content in the recovered dry matter. The lowest recovery rate was observed for SF = 4.13 (190 ℃/30 min) with 68.39%. The produced inhibitors were evaluated. 展开更多
关键词 Corn cobs steam explosion LIGNOCELLULOSE pretreatment.
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江苏赣榆出土宋银锭 被引量:2
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作者 李克文 《中国钱币》 北大核心 1995年第3期74-74,共1页
江苏赣榆出土宋银锭最近赣榆县宋代故城遗址“城址”村附近,距地表30厘米处出土六件宋代银锭,其形制、重量基本一致,唯铭文有所差异。银锭为束腰硅码形,两端宽约9.5、腰宽5.5厘米。锭面略凹,边沿微卷如砚,有竖列砸印铭文... 江苏赣榆出土宋银锭最近赣榆县宋代故城遗址“城址”村附近,距地表30厘米处出土六件宋代银锭,其形制、重量基本一致,唯铭文有所差异。银锭为束腰硅码形,两端宽约9.5、腰宽5.5厘米。锭面略凹,边沿微卷如砚,有竖列砸印铭文,其中一件铭文为“密州侯家”、“诸... 展开更多
关键词 江苏赣榆 蜂窝气孔 钱币研究 银锭 赣榆县 重量基 遗址 代银 密州 故城
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Fluctuation with dust of de Sitter ground state of scalar-tensor gravity 被引量:1
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作者 TANG YanKe ZHANG HongSheng +1 位作者 CHEN ChiYi LI XinZhou 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2014年第3期411-417,共7页
An exact de Sitter solution of scalar-tensor gravity is found in our recent work, in which the non-minimal coupling scalar is rolling along a non-constant potential. Based on this solution, a dust-filled FRW universe ... An exact de Sitter solution of scalar-tensor gravity is found in our recent work, in which the non-minimal coupling scalar is rolling along a non-constant potential. Based on this solution, a dust-filled FRW universe is explored in frame of scalar-tensor gravity in this article. The effective dark energy induced by the sole non-minimal scalar can be quintessence-like, phantom-like, and more significantly, can cross the phantom divide. The rich and varied properties of scalar-tensor gravity even with only one scalar is shown. 展开更多
关键词 scalar tensor gravity de Sitter space dark energy phantom divide
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A New Signature-Based Algorithms for Computing Gr?bner Bases
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作者 ZHENG Licui LIU Jinwang +1 位作者 LIU Weijun LI Dongmei 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2015年第1期210-221,共12页
Gao, Volny and Wang (2010) gave a simple criterion for signature-based algorithms to compute GrSbner bases. It gives a unified frame work for computing GrSbner bases for both ideals and syzygies, the latter is very ... Gao, Volny and Wang (2010) gave a simple criterion for signature-based algorithms to compute GrSbner bases. It gives a unified frame work for computing GrSbner bases for both ideals and syzygies, the latter is very important in free resolutions in homological algebra. Sun and Wang (2011) later generalized the GVW criterion to a more general situation (to include the F5 Algorithm). Signature-based algorithms have become increasingly popular for computing GrSbner bases. The current paper introduces a concept of factor pairs that can be used to detect more useless J-pairs than the generalized GVW criterion, thus improving signature-based algorithms. 展开更多
关键词 Factor Grobner basic signature-based.
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Electrochemically sensitive supra-crosslink and its corresponding hydrogel 被引量:5
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作者 DU Ping CHEN GuoSong JIANG Ming 《Science China Chemistry》 SCIE EI CAS 2012年第5期836-843,共8页
In this work, through inclusion complexation between cyclodextrin (CD) host and ferrocene (Fc) guest, a monomer with double bond was incorporated to the surface of CdS quantum dot (QD). The obtained supra-structure co... In this work, through inclusion complexation between cyclodextrin (CD) host and ferrocene (Fc) guest, a monomer with double bond was incorporated to the surface of CdS quantum dot (QD). The obtained supra-structure could act as a supra-crosslink (Fc-SCL) in its copolymerizing with N,N-dimethylacrylamide (DMA) leading to a hybrid supramolecular hydrogel (Fc-Gel). Fc-SCL inherited satisfactory electrochemical activity from Fc. When the weight percentage of Fc-SCL in Fc-Gel was increased, an apparent increase of elastic modulus (G ′) was observed. Furthermore, Fc-Gel also exhibited good fluorescent properties. It was also demonstrated that the inclusion complexation of CD and Fc played a crucial role in constructing the hydrogel; therefore, this Fc-Gel was an organic-inorganic hybrid hydrogel induced by supramolecular interaction. 展开更多
关键词 supramolecular hydrogel electrochemical activity supra-crosslink inclusion complexation CYCLODEXTRIN
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