英语形容词按其语法功能可分为两大类:一类叫做叙述形容词(predicative adjective),是指用在系词后面来修饰主语的,用作表语,例如:He is angry.(他生气了);一类叫限定形容词(attributive adjective),是指用在名词前面以限定其意义的,用...英语形容词按其语法功能可分为两大类:一类叫做叙述形容词(predicative adjective),是指用在系词后面来修饰主语的,用作表语,例如:He is angry.(他生气了);一类叫限定形容词(attributive adjective),是指用在名词前面以限定其意义的,用作定语,例如:He is an angry man.(他是个易怒的人)。大多数形容词既是叙述的,同时也是限定的,既可用作表语,又可用作定语。可以用“very”来修饰的形容词,有形容词比较级,如上述两个例句,我们可以说“She was angrier at her husband said.”(她对她丈夫所说的话更为生气。)但象angry这类描述性形容词,也有不少没有形容词比较级。形容词“infinite”可用作定语,也可用作表语,但不可用“very”修饰,形容词“utter”仅可用作定语,起限定作用,也不能用“very”修饰;形容词“ablaze”仅用作表语,起叙述作用,所以三个词都没有比较级。再说,比较级用得不当,不但不能限定其性质,反而使句子累赘,甚至造成“This house is more wooden than that house”这样的错句。为了使英语初学者有比较清楚的了解,本文着重就无比较级形容词作一粗略分析,探索其一般规律,供同志们参考。展开更多
It is of great scientific significance to construct a 3D dynamic structural color with a special color effect based on the microlens array.However,the problems of imperfect mechanisms and poor color quality need to be...It is of great scientific significance to construct a 3D dynamic structural color with a special color effect based on the microlens array.However,the problems of imperfect mechanisms and poor color quality need to be solved.A method of 3D structural color turning on periodic metasurfaces fabricated by the microlens array and self-assembly technology was proposed in this study.In the experiment,Polydimethylsiloxane(PDMS)flexible film was used as a substrate,and SiO2 microspheres were scraped into grooves of the PDMS film to form 3D photonic crystal structures.By adjusting the number of blade-coated times and microsphere concentrations,high-saturation structural color micropatterns were obtained.These films were then matched with microlens arrays to produce dynamic graphics with iridescent effects.The results showed that by blade-coated two times and SiO2 microsphere concentrations of 50%are the best conditions.This method demonstrates the potential for being widely applied in the anticounterfeiting printing and ultra-high-resolution display.展开更多
The Jurassic Lianggaoshan Formation in eastern Sichuan Basin is a key target for shale oil exploration.It faces challenges in three-pressure prediction due to complex structural and sedimentary interactions,as well as...The Jurassic Lianggaoshan Formation in eastern Sichuan Basin is a key target for shale oil exploration.It faces challenges in three-pressure prediction due to complex structural and sedimentary interactions,as well as strong reservoir anisotropy.These issues often lead to wellbore instability and gas logging anomalies during drilling.This study presents an integrated workflow that combines residual moveout correction using correlation-based dynamic time warping(CDTW),high-resolution seismic waveform indication inversion,and three-pressure prediction of jointing well-seismic data.Applied to the LT1 well block,the workflow effectively corrects anisotropic residual moveout in image gathers,leading to a signal strength increase of over 10%in frequency bands above 30 Hz and enhancing event continuity.High-resolution rock mechanical parameters are obtained through seismic waveform inversion and regional calibration,enabling the prediction of three-dimensional pore pressure,collapse pressure and fracture pressure.The results are consistent with actual drilling gas shows and core data,confirming the method's accuracy and supporting mud weight planning and wellbore stability efforts.This cost-effective and technically robust approach proves highly reliable in complex environments with significant heterogeneity and anisotropy,assisting drilling decisions and risk management in eastern Sichuan and similar challenging geological settings.展开更多
The modifiedλ-differential Lie-Yamaguti algebras are considered,in which a modifiedλ-differential Lie-Yamaguti algebra consisting of a Lie-Yamaguti algebra and a modifiedλ-differential operator.First we introduce t...The modifiedλ-differential Lie-Yamaguti algebras are considered,in which a modifiedλ-differential Lie-Yamaguti algebra consisting of a Lie-Yamaguti algebra and a modifiedλ-differential operator.First we introduce the representation of modifiedλ-differential Lie-Yamaguti algebras.Furthermore,we establish the cohomology of a modifiedλ-differential Lie-Yamaguti algebra with coefficients in a representation.Finally,we investigate the one-parameter formal deformations and Abelian extensions of modifiedλ-differential Lie-Yamaguti algebras using the second cohomology group.展开更多
文摘英语形容词按其语法功能可分为两大类:一类叫做叙述形容词(predicative adjective),是指用在系词后面来修饰主语的,用作表语,例如:He is angry.(他生气了);一类叫限定形容词(attributive adjective),是指用在名词前面以限定其意义的,用作定语,例如:He is an angry man.(他是个易怒的人)。大多数形容词既是叙述的,同时也是限定的,既可用作表语,又可用作定语。可以用“very”来修饰的形容词,有形容词比较级,如上述两个例句,我们可以说“She was angrier at her husband said.”(她对她丈夫所说的话更为生气。)但象angry这类描述性形容词,也有不少没有形容词比较级。形容词“infinite”可用作定语,也可用作表语,但不可用“very”修饰,形容词“utter”仅可用作定语,起限定作用,也不能用“very”修饰;形容词“ablaze”仅用作表语,起叙述作用,所以三个词都没有比较级。再说,比较级用得不当,不但不能限定其性质,反而使句子累赘,甚至造成“This house is more wooden than that house”这样的错句。为了使英语初学者有比较清楚的了解,本文着重就无比较级形容词作一粗略分析,探索其一般规律,供同志们参考。
文摘It is of great scientific significance to construct a 3D dynamic structural color with a special color effect based on the microlens array.However,the problems of imperfect mechanisms and poor color quality need to be solved.A method of 3D structural color turning on periodic metasurfaces fabricated by the microlens array and self-assembly technology was proposed in this study.In the experiment,Polydimethylsiloxane(PDMS)flexible film was used as a substrate,and SiO2 microspheres were scraped into grooves of the PDMS film to form 3D photonic crystal structures.By adjusting the number of blade-coated times and microsphere concentrations,high-saturation structural color micropatterns were obtained.These films were then matched with microlens arrays to produce dynamic graphics with iridescent effects.The results showed that by blade-coated two times and SiO2 microsphere concentrations of 50%are the best conditions.This method demonstrates the potential for being widely applied in the anticounterfeiting printing and ultra-high-resolution display.
基金supported by Science and Technology Cooperation Project of the CNPC-SWPU Innovation Alliance(No.2020CX010202).
文摘The Jurassic Lianggaoshan Formation in eastern Sichuan Basin is a key target for shale oil exploration.It faces challenges in three-pressure prediction due to complex structural and sedimentary interactions,as well as strong reservoir anisotropy.These issues often lead to wellbore instability and gas logging anomalies during drilling.This study presents an integrated workflow that combines residual moveout correction using correlation-based dynamic time warping(CDTW),high-resolution seismic waveform indication inversion,and three-pressure prediction of jointing well-seismic data.Applied to the LT1 well block,the workflow effectively corrects anisotropic residual moveout in image gathers,leading to a signal strength increase of over 10%in frequency bands above 30 Hz and enhancing event continuity.High-resolution rock mechanical parameters are obtained through seismic waveform inversion and regional calibration,enabling the prediction of three-dimensional pore pressure,collapse pressure and fracture pressure.The results are consistent with actual drilling gas shows and core data,confirming the method's accuracy and supporting mud weight planning and wellbore stability efforts.This cost-effective and technically robust approach proves highly reliable in complex environments with significant heterogeneity and anisotropy,assisting drilling decisions and risk management in eastern Sichuan and similar challenging geological settings.
基金National Natural Science Foundation of China(12161013)Research Projects of Guizhou University of Commerce in 2024。
文摘The modifiedλ-differential Lie-Yamaguti algebras are considered,in which a modifiedλ-differential Lie-Yamaguti algebra consisting of a Lie-Yamaguti algebra and a modifiedλ-differential operator.First we introduce the representation of modifiedλ-differential Lie-Yamaguti algebras.Furthermore,we establish the cohomology of a modifiedλ-differential Lie-Yamaguti algebra with coefficients in a representation.Finally,we investigate the one-parameter formal deformations and Abelian extensions of modifiedλ-differential Lie-Yamaguti algebras using the second cohomology group.
