Collaborative Filtering(CF) is a leading approach to build recommender systems which has gained considerable development and popularity. A predominant approach to CF is rating prediction recommender algorithm, aiming ...Collaborative Filtering(CF) is a leading approach to build recommender systems which has gained considerable development and popularity. A predominant approach to CF is rating prediction recommender algorithm, aiming to predict a user's rating for those items which were not rated yet by the user. However, with the increasing number of items and users, thedata is sparse.It is difficult to detectlatent closely relation among the items or users for predicting the user behaviors. In this paper,we enhance the rating prediction approach leading to substantial improvement of prediction accuracy by categorizing according to the genres of movies. Then the probabilities that users are interested in the genres are computed to integrate the prediction of each genre cluster. A novel probabilistic approach based on the sentiment analysis of the user reviews is also proposed to give intuitional explanations of why an item is recommended.To test the novel recommendation approach, a new corpus of user reviews on movies obtained from the Internet Movies Database(IMDB) has been generated. Experimental results show that the proposed framework is effective and achieves a better prediction performance.展开更多
The Kirk test has good precision for measuring stray light in optical lithography and is the usual method of measuring stray light.However,Kirk did not provide a theoretical explanation to his simulation model.We atte...The Kirk test has good precision for measuring stray light in optical lithography and is the usual method of measuring stray light.However,Kirk did not provide a theoretical explanation to his simulation model.We attempt to give Kirk's model a kind of theoretical explanation and a little improvement based on the model of point spread function of scattering and the theory of statistical optics.It is indicated by simulation that the improved model fits Kirk's measurement data better.展开更多
The flow regimes of GLCC with horizon inlet and a vertical pipe are investigated in experiments,and the velocities and pressure drops data labeled by the corresponding flow regimes are collected.Combined with the flow...The flow regimes of GLCC with horizon inlet and a vertical pipe are investigated in experiments,and the velocities and pressure drops data labeled by the corresponding flow regimes are collected.Combined with the flow regimes data of other GLCC positions from other literatures in existence,the gas and liquid superficial velocities and pressure drops are used as the input of the machine learning algorithms respectively which are applied to identify the flow regimes.The choosing of input data types takes the availability of data for practical industry fields into consideration,and the twelve machine learning algorithms are chosen from the classical and popular algorithms in the area of classification,including the typical ensemble models,SVM,KNN,Bayesian Model and MLP.The results of flow regimes identification show that gas and liquid superficial velocities are the ideal type of input data for the flow regimes identification by machine learning.Most of the ensemble models can identify the flow regimes of GLCC by gas and liquid velocities with the accuracy of 0.99 and more.For the pressure drops as the input of each algorithm,it is not the suitable as gas and liquid velocities,and only XGBoost and Bagging Tree can identify the GLCC flow regimes accurately.The success and confusion of each algorithm are analyzed and explained based on the experimental phenomena of flow regimes evolution processes,the flow regimes map,and the principles of algorithms.The applicability and feasibility of each algorithm according to different types of data for GLCC flow regimes identification are proposed.展开更多
Supernova 1987 A is a core collapse supernova in the Large Magellanic Cloud, inside which the product is most likely a neutron star. Despite the most sensitive available detection instruments from radio to γ-ray wave...Supernova 1987 A is a core collapse supernova in the Large Magellanic Cloud, inside which the product is most likely a neutron star. Despite the most sensitive available detection instruments from radio to γ-ray wavebands being exploited in the pass thirty years, there have not yet been any pulse signals detected. By considering the density of the medium plasma in the remnant of 1987 A, we find that the plasma cut-off frequency is approximately7 GHz, a value higher than the conventional observational waveband of radio pulsars. As derived, with the expansion of the supernova remnant, the radio signal will be detected in 2073 A.D. at 3 GHz.展开更多
In English business news discourses, there are numerous financial words or terms which are quite difficult for readers to under-stand, especially those ones built on the basis of metaphorical mechanism. Conceptual Met...In English business news discourses, there are numerous financial words or terms which are quite difficult for readers to under-stand, especially those ones built on the basis of metaphorical mechanism. Conceptual Metaphor has a strong power to explain the cor-rect meaning of these words with their specific types of metaphors. Through the explanation of the meaning construction of the metaphori-cal words, it can be a great help for the news readers to master the accurate and deep-seated messages in the discourse. Simultaneously,it gives the reader an insight into the English culture in order to grasp the international economic trends and makes them accomplishcross-cultural communication task with ease.展开更多
Trade data In July,the total import and export value of national trade in goods was USD 412.93 billion,an increase of 3.4%year-on-year(the same below),of which exports were USD 237.63 billion,an increase of 7.2%,and i...Trade data In July,the total import and export value of national trade in goods was USD 412.93 billion,an increase of 3.4%year-on-year(the same below),of which exports were USD 237.63 billion,an increase of 7.2%,and imports were USD 175.3 billion,a decrease of 1.4%.The trade surplus for the month was USD 62.33 billion.From January to July,the total import and export value was USD 244.263 billion,a year-on-year decrease of 4.8%,of which exports were USD 133.638 billion,a decrease of 4.1%,imports were USD 110.625 billion,a decrease of 75.7%,and a cumulative surplus of USD 230.13 billion was achieved.展开更多
Hade 4 oilfield is located on the Hadexun tectonic belt north of the Manjiaer depression in the Tarim basin, whose main target layer is the Donghe sandstone reservoir, with a burial depth over 5,000m and an amplitude ...Hade 4 oilfield is located on the Hadexun tectonic belt north of the Manjiaer depression in the Tarim basin, whose main target layer is the Donghe sandstone reservoir, with a burial depth over 5,000m and an amplitude below 34m, at the bottom of the Carboniferous. The Donghe sandstone reservoir consists of littoral facies deposited quartz sandstones of the transgressive system tract, overlapping northward and pinching out. Exploration and development confirms that water-oil contact tilts from the southeast to the northwest with a drop height of nearly 80m. The reservoir, under the control of both the stratigraphic overlap pinch-out and tectonism, is a typical subtle reservoir. The Donghe sandstone reservoir in Hade 4 oilfield also has the feature of a large oil-bearing area (over 130 km2 proved), a small thickness (average efficient thickness below 6m) and a low abundance (below 50 × 104t/km2). Moreover, above the target layer developed a set of igneous rocks with an uneven thickness in the Permian formation, thus causing a great difficulty in research of the velocity field. Considering these features, an combination mode of exploration and development is adopted, namely by way of whole deployment, step-by-step enforcement and rolling development with key problems to be tackled, in order to further deepen the understanding and enlarge the fruits of exploration and development. The paper technically focuses its study on the following four aspects concerning problem tackling. First, to strengthen the collecting, processing and explanation of seismic data, improve the resolution, accurately recognize the pinch-out line of the Donghe sandstone reservoir by combining the drilling materials in order to make sure its distribution law; second, to strengthen the research on velocity field, improve the accuracy of variable speed mapping, make corrections by the data from newly- drilled key wells and, as a result, the precision of tectonic description is greatly improved; third, to strengthen the research on sequence stratigraphy and make sure the distribution law of the Donghe sandstone; and fourth, with a step- by-step extrapolation method, to deepen the cognition of the leaning water-oil contact, and by combining the tectonic description and drilling results, to make sure little by little the law of change of the water-oil contact. The exploration and development of the Donghe sandstone subtle reservoir in Hade 4 oilfield is a gradually perfected process. From 1998 when it was discovered till now, the reservoir has managed to make a benign circle of exploration and development, in which its reserve has gradually been enlarged, its production scale increased, and, in a word, it has used techniques necessary for this subtle reservoir in the Tarim basin.展开更多
A lot of narrow lines.on R_(2),R^(+),N_(1),N^(-) and some other un kowll centers have been observed in γ-raycd pure and doped sodium fuoride crystals in the temperature range of 9-77 K.The proper laser irradiation wa...A lot of narrow lines.on R_(2),R^(+),N_(1),N^(-) and some other un kowll centers have been observed in γ-raycd pure and doped sodium fuoride crystals in the temperature range of 9-77 K.The proper laser irradiation was used for strengthening the zero-phonon lines and the relative explanation was given.The spectral properties and thermosta-bilities of the lines were in vestigated systematically at difcrent temperatures.展开更多
In this paper,the Coulomb correction to Keldysh-Faisal-Reiss theory is derived in A-gauge.An application of the Coulomb correction to the photoelectric effect of H-atom is presented and the role of the gauge choice an...In this paper,the Coulomb correction to Keldysh-Faisal-Reiss theory is derived in A-gauge.An application of the Coulomb correction to the photoelectric effect of H-atom is presented and the role of the gauge choice and the Coulomb correction are discussed.It is shown that the Coulomb correction plays an importaht role in the explanation of the recent energetic photoelectron spectra of He.展开更多
A helicon mode discharge is realized in a newly erected set-up and two jumps are observed in the variation of plasma density with the controlled magnetic field,which is a typical characteristic of helicon mode dischar...A helicon mode discharge is realized in a newly erected set-up and two jumps are observed in the variation of plasma density with the controlled magnetic field,which is a typical characteristic of helicon mode discharge.A reasonable explanation is proposed for the appearance of the density jumps.The helicon wavelength is evaluated to be about 20 cm and it is nearly constant in the helicon mode discharge.The density obtained is nearly up to 3.5 × 10^(18)m^(-3) with only 0.5Pa argon pressure and 300W radio frequency power supply,and it is more than one magnitude higher than that in other discharges at comparable pressures and input powers.The electron temperature is found to be increased as the pressure is decreased.展开更多
A brand is the identity of a specific product,service,or business.The brand name is quite often used interchangeably with "brand",although it is more correctly used to specifically denote written or spoken l...A brand is the identity of a specific product,service,or business.The brand name is quite often used interchangeably with "brand",although it is more correctly used to specifically denote written or spoken linguistic elements of any product.Developed from the mental space theory,conceptual blending theory is an important part of cognitive linguistic researches.Based on this theory and integration networks,this paper explains the meaning construction of the translated brand names and the way people understand them.This paper takes two successful translation cases and two unsuccessful ones to make the contrast analysis.It proves that conceptual blending theory can provide detailed description and profound explanation of the perceiving process of brand name translation.Meanwhile it points out the direction of brand name translation from the perspective of cognitive linguistics.展开更多
As one of the most important mathematical methods, the Dempster-Shafer（D-S）evidence theory has been widely used in date fusion, risk assessment, target identification, knowledge reasoning,and other fields. This pape...As one of the most important mathematical methods, the Dempster-Shafer（D-S）evidence theory has been widely used in date fusion, risk assessment, target identification, knowledge reasoning,and other fields. This paper summarized the development and recent studies of the explanations of D-S model, evidence combination algorithms, and the improvement of the conflict during evidence combination, and also compared all explanation models,algorithms, improvements, and their applicable conditions. We are trying to provide a reference for future research and applications through this summarization.展开更多
The essay is based on The Libido for the Ugly written by Henry Louis Mencken.The writer demonstrates the persuasiveness of the work through two different aspects–persuasive and impressionistic writing skills.After de...The essay is based on The Libido for the Ugly written by Henry Louis Mencken.The writer demonstrates the persuasiveness of the work through two different aspects–persuasive and impressionistic writing skills.After detailed analysis,the reason for the strong credibility of that subjective description could be clearly shown.展开更多
We calculate the scattering cross section of an electron with respect to the spontaneously produced laser radiation in the first free-electron laser （FEL） with quantum-wiggler electrodynamics （QWD）. The cross sect...We calculate the scattering cross section of an electron with respect to the spontaneously produced laser radiation in the first free-electron laser （FEL） with quantum-wiggler electrodynamics （QWD）. The cross section is 1016 times the Thomson cross section, confirming the result obtained by a previous analysis of the experimental data. A QWD calculation show that spontaneous emission in an FEL using only an electric wiggler can be very strong while amplification through net stimulated emission is practically negligible.展开更多
The thick targets of Ti,Fet Ni and Zn have been bombarded with 3 to 7Me V nickel ions.The X-ray spectra of the projectiles and targets showed a significant difference in the intensity of the X-ray radiation for severa...The thick targets of Ti,Fet Ni and Zn have been bombarded with 3 to 7Me V nickel ions.The X-ray spectra of the projectiles and targets showed a significant difference in the intensity of the X-ray radiation for several targets.The explanation of this phenomenon by quasimolecular orbital energy level correlation diagrams and the possible application of Ni ion induced X-ray emission were discussed.展开更多
The M operation is introduced in η-ξ spacetime to derive the tilde rules in thermo field dynamics (TFD). This leads to an explanation of the tilde system in TFD as the system in region II of η-ξ spacetime.
The original version of this article unfortunately contained some mistakes.1.The authors found that the data unit in Fig.3a–f is wrong.The corrected version of Fig.3 is given below:2.The authors found that explanatio...The original version of this article unfortunately contained some mistakes.1.The authors found that the data unit in Fig.3a–f is wrong.The corrected version of Fig.3 is given below:2.The authors found that explanation of the data lines in Fig.2e is wrong.The corrected version of the explanation of Fig.2e is given below:The DNB can endure approximately 300%stretching and withstand stress up to about 1.5 MPa,as shown in Fig.2e.展开更多
The original version of this article unfortunately contained some mistakes in figure. The authors found that explanation of the data lines in Fig. 5b is wrong.The corrected version of Fig. 5b is given below:Open Acces...The original version of this article unfortunately contained some mistakes in figure. The authors found that explanation of the data lines in Fig. 5b is wrong.The corrected version of Fig. 5b is given below:Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License,which permits use,sharing,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s) and the source,provide a link to the Creative Commons licence.展开更多
The specific heat anomalies are analytically studied in the system in which a harmonic oscillator couples to a heat bath with harmonic noise.The physical explanation leads to a general spectral dependence of the speci...The specific heat anomalies are analytically studied in the system in which a harmonic oscillator couples to a heat bath with harmonic noise.The physical explanation leads to a general spectral dependence of the specific heat anomalies.The condition of a dip appearance and the behaviors of the dip can be given according to the shape of the bath's power spectrum by employing the minimal heat bath model.展开更多
The relative changes of thermal diffusivity lengths in ionimplanted and unirnplanted silicon wafers were studied,with "mirage effecct",i,e,OBD techique.The fundamental principle,experimental results and feas...The relative changes of thermal diffusivity lengths in ionimplanted and unirnplanted silicon wafers were studied,with "mirage effecct",i,e,OBD techique.The fundamental principle,experimental results and feasible explanation are presented.展开更多
基金supported in part by National Science Foundation of China under Grants No.61303105 and 61402304the Humanity&Social Science general project of Ministry of Education under Grants No.14YJAZH046+2 种基金the Beijing Natural Science Foundation under Grants No.4154065the Beijing Educational Committee Science and Technology Development Planned under Grants No.KM201410028017Academic Degree Graduate Courses group projects
文摘Collaborative Filtering(CF) is a leading approach to build recommender systems which has gained considerable development and popularity. A predominant approach to CF is rating prediction recommender algorithm, aiming to predict a user's rating for those items which were not rated yet by the user. However, with the increasing number of items and users, thedata is sparse.It is difficult to detectlatent closely relation among the items or users for predicting the user behaviors. In this paper,we enhance the rating prediction approach leading to substantial improvement of prediction accuracy by categorizing according to the genres of movies. Then the probabilities that users are interested in the genres are computed to integrate the prediction of each genre cluster. A novel probabilistic approach based on the sentiment analysis of the user reviews is also proposed to give intuitional explanations of why an item is recommended.To test the novel recommendation approach, a new corpus of user reviews on movies obtained from the Internet Movies Database(IMDB) has been generated. Experimental results show that the proposed framework is effective and achieves a better prediction performance.
基金by the National Basic Research Program of China under Grant No 2007AA01Z333the National Special Program of China under Grant No 2009ZX02204-008.
文摘The Kirk test has good precision for measuring stray light in optical lithography and is the usual method of measuring stray light.However,Kirk did not provide a theoretical explanation to his simulation model.We attempt to give Kirk's model a kind of theoretical explanation and a little improvement based on the model of point spread function of scattering and the theory of statistical optics.It is indicated by simulation that the improved model fits Kirk's measurement data better.
文摘The flow regimes of GLCC with horizon inlet and a vertical pipe are investigated in experiments,and the velocities and pressure drops data labeled by the corresponding flow regimes are collected.Combined with the flow regimes data of other GLCC positions from other literatures in existence,the gas and liquid superficial velocities and pressure drops are used as the input of the machine learning algorithms respectively which are applied to identify the flow regimes.The choosing of input data types takes the availability of data for practical industry fields into consideration,and the twelve machine learning algorithms are chosen from the classical and popular algorithms in the area of classification,including the typical ensemble models,SVM,KNN,Bayesian Model and MLP.The results of flow regimes identification show that gas and liquid superficial velocities are the ideal type of input data for the flow regimes identification by machine learning.Most of the ensemble models can identify the flow regimes of GLCC by gas and liquid velocities with the accuracy of 0.99 and more.For the pressure drops as the input of each algorithm,it is not the suitable as gas and liquid velocities,and only XGBoost and Bagging Tree can identify the GLCC flow regimes accurately.The success and confusion of each algorithm are analyzed and explained based on the experimental phenomena of flow regimes evolution processes,the flow regimes map,and the principles of algorithms.The applicability and feasibility of each algorithm according to different types of data for GLCC flow regimes identification are proposed.
基金Supported by the National Basic Research Program of China under Grant No 2015CB857100the National Key Research and Development Program of China under Grant No 2017YFA0402600the National Natural Science Foundation of China under Grant Nos 11173034,11703003 and U1731238
文摘Supernova 1987 A is a core collapse supernova in the Large Magellanic Cloud, inside which the product is most likely a neutron star. Despite the most sensitive available detection instruments from radio to γ-ray wavebands being exploited in the pass thirty years, there have not yet been any pulse signals detected. By considering the density of the medium plasma in the remnant of 1987 A, we find that the plasma cut-off frequency is approximately7 GHz, a value higher than the conventional observational waveband of radio pulsars. As derived, with the expansion of the supernova remnant, the radio signal will be detected in 2073 A.D. at 3 GHz.
文摘In English business news discourses, there are numerous financial words or terms which are quite difficult for readers to under-stand, especially those ones built on the basis of metaphorical mechanism. Conceptual Metaphor has a strong power to explain the cor-rect meaning of these words with their specific types of metaphors. Through the explanation of the meaning construction of the metaphori-cal words, it can be a great help for the news readers to master the accurate and deep-seated messages in the discourse. Simultaneously,it gives the reader an insight into the English culture in order to grasp the international economic trends and makes them accomplishcross-cultural communication task with ease.
文摘Trade data In July,the total import and export value of national trade in goods was USD 412.93 billion,an increase of 3.4%year-on-year(the same below),of which exports were USD 237.63 billion,an increase of 7.2%,and imports were USD 175.3 billion,a decrease of 1.4%.The trade surplus for the month was USD 62.33 billion.From January to July,the total import and export value was USD 244.263 billion,a year-on-year decrease of 4.8%,of which exports were USD 133.638 billion,a decrease of 4.1%,imports were USD 110.625 billion,a decrease of 75.7%,and a cumulative surplus of USD 230.13 billion was achieved.
文摘Hade 4 oilfield is located on the Hadexun tectonic belt north of the Manjiaer depression in the Tarim basin, whose main target layer is the Donghe sandstone reservoir, with a burial depth over 5,000m and an amplitude below 34m, at the bottom of the Carboniferous. The Donghe sandstone reservoir consists of littoral facies deposited quartz sandstones of the transgressive system tract, overlapping northward and pinching out. Exploration and development confirms that water-oil contact tilts from the southeast to the northwest with a drop height of nearly 80m. The reservoir, under the control of both the stratigraphic overlap pinch-out and tectonism, is a typical subtle reservoir. The Donghe sandstone reservoir in Hade 4 oilfield also has the feature of a large oil-bearing area (over 130 km2 proved), a small thickness (average efficient thickness below 6m) and a low abundance (below 50 × 104t/km2). Moreover, above the target layer developed a set of igneous rocks with an uneven thickness in the Permian formation, thus causing a great difficulty in research of the velocity field. Considering these features, an combination mode of exploration and development is adopted, namely by way of whole deployment, step-by-step enforcement and rolling development with key problems to be tackled, in order to further deepen the understanding and enlarge the fruits of exploration and development. The paper technically focuses its study on the following four aspects concerning problem tackling. First, to strengthen the collecting, processing and explanation of seismic data, improve the resolution, accurately recognize the pinch-out line of the Donghe sandstone reservoir by combining the drilling materials in order to make sure its distribution law; second, to strengthen the research on velocity field, improve the accuracy of variable speed mapping, make corrections by the data from newly- drilled key wells and, as a result, the precision of tectonic description is greatly improved; third, to strengthen the research on sequence stratigraphy and make sure the distribution law of the Donghe sandstone; and fourth, with a step- by-step extrapolation method, to deepen the cognition of the leaning water-oil contact, and by combining the tectonic description and drilling results, to make sure little by little the law of change of the water-oil contact. The exploration and development of the Donghe sandstone subtle reservoir in Hade 4 oilfield is a gradually perfected process. From 1998 when it was discovered till now, the reservoir has managed to make a benign circle of exploration and development, in which its reserve has gradually been enlarged, its production scale increased, and, in a word, it has used techniques necessary for this subtle reservoir in the Tarim basin.
基金Supported by the National Natural Science Foundation of China。
文摘A lot of narrow lines.on R_(2),R^(+),N_(1),N^(-) and some other un kowll centers have been observed in γ-raycd pure and doped sodium fuoride crystals in the temperature range of 9-77 K.The proper laser irradiation was used for strengthening the zero-phonon lines and the relative explanation was given.The spectral properties and thermosta-bilities of the lines were in vestigated systematically at difcrent temperatures.
文摘In this paper,the Coulomb correction to Keldysh-Faisal-Reiss theory is derived in A-gauge.An application of the Coulomb correction to the photoelectric effect of H-atom is presented and the role of the gauge choice and the Coulomb correction are discussed.It is shown that the Coulomb correction plays an importaht role in the explanation of the recent energetic photoelectron spectra of He.
文摘A helicon mode discharge is realized in a newly erected set-up and two jumps are observed in the variation of plasma density with the controlled magnetic field,which is a typical characteristic of helicon mode discharge.A reasonable explanation is proposed for the appearance of the density jumps.The helicon wavelength is evaluated to be about 20 cm and it is nearly constant in the helicon mode discharge.The density obtained is nearly up to 3.5 × 10^(18)m^(-3) with only 0.5Pa argon pressure and 300W radio frequency power supply,and it is more than one magnitude higher than that in other discharges at comparable pressures and input powers.The electron temperature is found to be increased as the pressure is decreased.
文摘A brand is the identity of a specific product,service,or business.The brand name is quite often used interchangeably with "brand",although it is more correctly used to specifically denote written or spoken linguistic elements of any product.Developed from the mental space theory,conceptual blending theory is an important part of cognitive linguistic researches.Based on this theory and integration networks,this paper explains the meaning construction of the translated brand names and the way people understand them.This paper takes two successful translation cases and two unsuccessful ones to make the contrast analysis.It proves that conceptual blending theory can provide detailed description and profound explanation of the perceiving process of brand name translation.Meanwhile it points out the direction of brand name translation from the perspective of cognitive linguistics.
基金supported by the Special Project in Humanities and Social Sciences by the Ministry of Education of China(Cultivation of Engineering and Technological Talents)under Grant No.13JDGC002
文摘As one of the most important mathematical methods, the Dempster-Shafer（D-S）evidence theory has been widely used in date fusion, risk assessment, target identification, knowledge reasoning,and other fields. This paper summarized the development and recent studies of the explanations of D-S model, evidence combination algorithms, and the improvement of the conflict during evidence combination, and also compared all explanation models,algorithms, improvements, and their applicable conditions. We are trying to provide a reference for future research and applications through this summarization.
文摘The essay is based on The Libido for the Ugly written by Henry Louis Mencken.The writer demonstrates the persuasiveness of the work through two different aspects–persuasive and impressionistic writing skills.After detailed analysis,the reason for the strong credibility of that subjective description could be clearly shown.
文摘We calculate the scattering cross section of an electron with respect to the spontaneously produced laser radiation in the first free-electron laser （FEL） with quantum-wiggler electrodynamics （QWD）. The cross section is 1016 times the Thomson cross section, confirming the result obtained by a previous analysis of the experimental data. A QWD calculation show that spontaneous emission in an FEL using only an electric wiggler can be very strong while amplification through net stimulated emission is practically negligible.
文摘The thick targets of Ti,Fet Ni and Zn have been bombarded with 3 to 7Me V nickel ions.The X-ray spectra of the projectiles and targets showed a significant difference in the intensity of the X-ray radiation for several targets.The explanation of this phenomenon by quasimolecular orbital energy level correlation diagrams and the possible application of Ni ion induced X-ray emission were discussed.
基金Supported by the National Natural Science Foundation of China under Grant No.19475005。
文摘The M operation is introduced in η-ξ spacetime to derive the tilde rules in thermo field dynamics (TFD). This leads to an explanation of the tilde system in TFD as the system in region II of η-ξ spacetime.
文摘The original version of this article unfortunately contained some mistakes.1.The authors found that the data unit in Fig.3a–f is wrong.The corrected version of Fig.3 is given below:2.The authors found that explanation of the data lines in Fig.2e is wrong.The corrected version of the explanation of Fig.2e is given below:The DNB can endure approximately 300%stretching and withstand stress up to about 1.5 MPa,as shown in Fig.2e.
文摘The original version of this article unfortunately contained some mistakes in figure. The authors found that explanation of the data lines in Fig. 5b is wrong.The corrected version of Fig. 5b is given below:Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License,which permits use,sharing,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s) and the source,provide a link to the Creative Commons licence.
基金Supported by the Fundamental Research Funds for the Central Universities.
文摘The specific heat anomalies are analytically studied in the system in which a harmonic oscillator couples to a heat bath with harmonic noise.The physical explanation leads to a general spectral dependence of the specific heat anomalies.The condition of a dip appearance and the behaviors of the dip can be given according to the shape of the bath's power spectrum by employing the minimal heat bath model.
基金supported by the Science Fund of the Chinese Academy of Sciences。
文摘The relative changes of thermal diffusivity lengths in ionimplanted and unirnplanted silicon wafers were studied,with "mirage effecct",i,e,OBD techique.The fundamental principle,experimental results and feasible explanation are presented.
