Nowadays,education and teaching have become a hot topic,and teaching in colleges and universities is facing a brand-new development direction.Principles of Concrete Structure Design,as one of the main courses,transmit...Nowadays,education and teaching have become a hot topic,and teaching in colleges and universities is facing a brand-new development direction.Principles of Concrete Structure Design,as one of the main courses,transmits professional knowledge for students,enhances the students’professional ability,and further carries out in-depth research on the course to bring a better teaching effect for students.The article mainly focuses on the research of the principles of concrete structure design course,conducts an analysis of the teaching characteristics of the principles of concrete structure design course,and reasonably sets the teaching content from the optimization of the course teaching objectives;innovative course teaching methods can deepen the effect of knowledge understanding;reform of experimental practice teaching can lay down the effect of the internalization of knowledge,etc.The in-depth description and discussion of the relevant aspects of the research aim to provide guidelines for related research.展开更多
Atmospheric deposition(dry and wet deposition)is one of the primary sources of chemical inputs to terrestrial ecosystems and replenishes the nutrient pool in forest ecosystems.Precipitation often acts as a primary tra...Atmospheric deposition(dry and wet deposition)is one of the primary sources of chemical inputs to terrestrial ecosystems and replenishes the nutrient pool in forest ecosystems.Precipitation often acts as a primary transporting agent and solvent;thus,nutrient cycles in forests are closely linked to hydrological processes.We collected precipitation data during a growing season to explore variations in nutrient cycling and nutrient balances in the rainfall redistribution process(wet deposition)in a larch plantation in northeast China.We measured nutrient(NO_(3)^(-),PO_(4)^(3−),Cl^(−),K,Ca,Na,and Mg)inputs via bulk precipitation,throughfall and stemfl ow,and used a canopy budget model to estimate nutrient fl uxes via canopy exchange.Our results suggest that the average concentrations of the base cation(K,Ca,Na,and Mg)showed the following order:stemfl ow>throughfall>bulk precipitation.Throughfall and stemfl ow chemistry dramatically fl uctuated over the growing season when net fl uxes(throughfall+stemfl ow—bulk precipitation)of NO−3,PO3−4,SO2−4,Cl−,K,Ca,Na,and Mg were−6.676 kg·ha^(-1),−1.094 kg·ha^(-1),−2.371 kg·ha^(-1),1.975 kg·ha^(-1),0.470 kg·ha^(-1),−5.202 kg·ha^(-1),−0.336 kg·ha^(-1),and 1.397 kg·ha^(-1),respectively.These results suggest that NO−3,PO3−4,SO2−4,Ca,and Na were retained,while Cl−,K,and Mg were washed off by throughfall and stemfl ow.展开更多
On December 21,2020,The State Council Information Office issued a white paper titled"China's Energy Development in the New Era,"in which the installed capacity of hydropower,wind power,photovoltaic power...On December 21,2020,The State Council Information Office issued a white paper titled"China's Energy Development in the New Era,"in which the installed capacity of hydropower,wind power,photovoltaic power and biomass power generation in China ranked first in the world[1].Solar photovoltaic power generation is the most important development direction of clean energy in the world.It is an important energy strategy to combine it with the field of construction in China.This paper mainly introduces the characteristics and problems of the key technologies of solar photovoltaic building integration,and explores its future development direction and ways,in order to constantly promote the industrialization of new energy technology in China.展开更多
Due to the novel coronavirus pneumonia epidemic,online education has become an inevitable choice for universities to carry out teaching.In this paper,in order to solve the problems encountered during automobile major,...Due to the novel coronavirus pneumonia epidemic,online education has become an inevitable choice for universities to carry out teaching.In this paper,in order to solve the problems encountered during automobile major,we adopt the network platform to mix online education mode,to provide students with timely and accurate learning mode.This paper aims to help students to have positive learning motivation,have good learning experience and improve their learning effect.展开更多
The course of architectural engineering drawing is the basic course before the students of civil engineering related majors study the professional courses.It aims to cultivate the students’ability of configuration,ex...The course of architectural engineering drawing is the basic course before the students of civil engineering related majors study the professional courses.It aims to cultivate the students’ability of configuration,expression,reading and drawing.BIM Technology simulates the real component information of a building through digital information simulation,and flexibly transforms between two-dimensional and threedimensional,providing a new tool for the teaching of architectural engineering drawing.This paper analyzes the characteristics of BIM Technology and teaching advantages,combined with the current teaching situation of architectural engineering drawing course,puts forward reform suggestions and implementation process,and provides reform ideas for the teaching of engineering basic courses.展开更多
Informatization is one of the main characteristics of the modern construction industry.As an important part of the construction industry,the application of BIM 5D has greatly promoted the transformation of the product...Informatization is one of the main characteristics of the modern construction industry.As an important part of the construction industry,the application of BIM 5D has greatly promoted the transformation of the production mode in the construction field.The development of the construction industry is inseparable from the training of professional talents by universities.More and more universities are actively exploring the role of BIM 5D in the process of talent training.Based on the research on BIM 5D in the training of civil engineering professionals in applied undergraduate colleges in combination with examples,this research proposes that the teaching reform path should be guided by BIM 5D training courses to drive a series of main courses teaching reforms.With BIM as the characteristic of running a school,it provides ideas for the training of civil engineering professionals.展开更多
To achieve a lower detection limit has always been a goal of analytical chemists.Herein,we demonstrate the first picomolar level detection capability for Fe3+ion via luminescence detection technology.The results of st...To achieve a lower detection limit has always been a goal of analytical chemists.Herein,we demonstrate the first picomolar level detection capability for Fe3+ion via luminescence detection technology.The results of structural analysis and theoretical calculation show that Fe3+ions are adsorbed on the central node of Eu-DBM(DBM=dibenzoylmethane)sensor in the form of single ion at ultralow concentration.Subsequently,the pathways of photo-induced charge and energy transfer of the obtained Eu-DBM@Fe^(3+)material have been changed,from the initial DBM-to-Eu^(3+)before Fe^(3+)adsorption to the ultimate DBM-to-Fe^(3+)after adsorption process,which quenches the luminescence of Eu3+ion.This work not only obtains the highly sensitive luminescence detection ability,but also innovatively proposes the single-ion adsorption mechanism,both of which have important scientific and application values for the development of more efficient detection agents in the future.展开更多
Designing photocatalysts with high light utilization and efficient photogenerated carrier separation for pollutant degradation is one of the important topics for sustainable development.In this study,hierarchical core...Designing photocatalysts with high light utilization and efficient photogenerated carrier separation for pollutant degradation is one of the important topics for sustainable development.In this study,hierarchical core–shell materialα-Fe_(2)O_(3)@ZnIn_(2)S_(4)with a step-scheme(S-scheme)heterojunction is synthesized by in situ growth technique,and MXene Ti_(3)C_(2)quantum dots(QDs)are introduced to construct a double-heterojunction tandem mechanism.The photodegradation efficiency ofα-Fe_(2)O_(3)@ZnIn_(2)S_(4)/Ti_(3)C_(2)QDs to bisphenol A is 96.1%and its reaction rate constant attained 0.02595 min^(−1),which is 12.3 times that of pureα-Fe_(2)O_(3).Meanwhile,a series of characterizations analyze the reasons for the enhanced photocatalytic activity,and the charge transport path of the S-scheme heterojunction/Schottky junction tandem is investigated.The construction of the S-scheme heterojunction enables the photo-generated electrons ofα-Fe_(2)O_(3)and the holes of ZnIn2S4 to transfer and combine under the action of the reverse built-in electric field.Due to the metallic conductivity of Ti_(3)C_(2)QDs,the photogenerated electrons of ZnIn_(2)S_(4)are further transferred to Ti_(3)C_(2)QDs to form a Schottky junction,which in turn forms a double-heterojunction tandem mechanism,showing a remarkable charge separation efficiency.This work provides a new opinion for the construction of tandem double heterojunctions to degrade harmful pollutants.展开更多
文摘Nowadays,education and teaching have become a hot topic,and teaching in colleges and universities is facing a brand-new development direction.Principles of Concrete Structure Design,as one of the main courses,transmits professional knowledge for students,enhances the students’professional ability,and further carries out in-depth research on the course to bring a better teaching effect for students.The article mainly focuses on the research of the principles of concrete structure design course,conducts an analysis of the teaching characteristics of the principles of concrete structure design course,and reasonably sets the teaching content from the optimization of the course teaching objectives;innovative course teaching methods can deepen the effect of knowledge understanding;reform of experimental practice teaching can lay down the effect of the internalization of knowledge,etc.The in-depth description and discussion of the relevant aspects of the research aim to provide guidelines for related research.
基金supported financially by the Natural Science Foundation of Heilongjiang Province of China(LH2020C032)the Fundamental Research Funds for the Central Universities(No.2572018BA10)。
文摘Atmospheric deposition(dry and wet deposition)is one of the primary sources of chemical inputs to terrestrial ecosystems and replenishes the nutrient pool in forest ecosystems.Precipitation often acts as a primary transporting agent and solvent;thus,nutrient cycles in forests are closely linked to hydrological processes.We collected precipitation data during a growing season to explore variations in nutrient cycling and nutrient balances in the rainfall redistribution process(wet deposition)in a larch plantation in northeast China.We measured nutrient(NO_(3)^(-),PO_(4)^(3−),Cl^(−),K,Ca,Na,and Mg)inputs via bulk precipitation,throughfall and stemfl ow,and used a canopy budget model to estimate nutrient fl uxes via canopy exchange.Our results suggest that the average concentrations of the base cation(K,Ca,Na,and Mg)showed the following order:stemfl ow>throughfall>bulk precipitation.Throughfall and stemfl ow chemistry dramatically fl uctuated over the growing season when net fl uxes(throughfall+stemfl ow—bulk precipitation)of NO−3,PO3−4,SO2−4,Cl−,K,Ca,Na,and Mg were−6.676 kg·ha^(-1),−1.094 kg·ha^(-1),−2.371 kg·ha^(-1),1.975 kg·ha^(-1),0.470 kg·ha^(-1),−5.202 kg·ha^(-1),−0.336 kg·ha^(-1),and 1.397 kg·ha^(-1),respectively.These results suggest that NO−3,PO3−4,SO2−4,Ca,and Na were retained,while Cl−,K,and Mg were washed off by throughfall and stemfl ow.
基金University-level Scientific Research Project of East University of Heilongjiang(Project No.HDFKY210106)。
文摘On December 21,2020,The State Council Information Office issued a white paper titled"China's Energy Development in the New Era,"in which the installed capacity of hydropower,wind power,photovoltaic power and biomass power generation in China ranked first in the world[1].Solar photovoltaic power generation is the most important development direction of clean energy in the world.It is an important energy strategy to combine it with the field of construction in China.This paper mainly introduces the characteristics and problems of the key technologies of solar photovoltaic building integration,and explores its future development direction and ways,in order to constantly promote the industrialization of new energy technology in China.
基金Core courses of Heilongjiang Oriental University(1810405).
文摘Due to the novel coronavirus pneumonia epidemic,online education has become an inevitable choice for universities to carry out teaching.In this paper,in order to solve the problems encountered during automobile major,we adopt the network platform to mix online education mode,to provide students with timely and accurate learning mode.This paper aims to help students to have positive learning motivation,have good learning experience and improve their learning effect.
基金The general research project of higher education teaching reform of Heilongjiang Provincial Department of education in 2019“construction and application of Engineering Graphics Teaching System Based on OBE concept and BIM Technology”,subject No.sjgy20190540Ministry of education industry university cooperation collaborative education project(new engineering construction)“Research on the application of intelligent construction technology in the training of engineering cost professionals”,Project No.201902102001.
文摘The course of architectural engineering drawing is the basic course before the students of civil engineering related majors study the professional courses.It aims to cultivate the students’ability of configuration,expression,reading and drawing.BIM Technology simulates the real component information of a building through digital information simulation,and flexibly transforms between two-dimensional and threedimensional,providing a new tool for the teaching of architectural engineering drawing.This paper analyzes the characteristics of BIM Technology and teaching advantages,combined with the current teaching situation of architectural engineering drawing course,puts forward reform suggestions and implementation process,and provides reform ideas for the teaching of engineering basic courses.
基金the Research of the Curriculum System for Civil Engineering Major of Applied Undergraduate Colleges Based on BIM5D(Project Number:HDFHX170318).
文摘Informatization is one of the main characteristics of the modern construction industry.As an important part of the construction industry,the application of BIM 5D has greatly promoted the transformation of the production mode in the construction field.The development of the construction industry is inseparable from the training of professional talents by universities.More and more universities are actively exploring the role of BIM 5D in the process of talent training.Based on the research on BIM 5D in the training of civil engineering professionals in applied undergraduate colleges in combination with examples,this research proposes that the teaching reform path should be guided by BIM 5D training courses to drive a series of main courses teaching reforms.With BIM as the characteristic of running a school,it provides ideas for the training of civil engineering professionals.
基金the National Natural Science Foundation of China(No.22075071)Harbin Manufacturing Science and Technology Innovation Talent Project(No.2022CXRCCG016)+1 种基金Outstanding Youth Science Foundation of Heilongjiang University(No.JCL202002)Special Project of Joint Dairy College in East University of Heilongjiang-National Dairy Engineering and Technology Research Center(No.LHXYDS202001).
文摘To achieve a lower detection limit has always been a goal of analytical chemists.Herein,we demonstrate the first picomolar level detection capability for Fe3+ion via luminescence detection technology.The results of structural analysis and theoretical calculation show that Fe3+ions are adsorbed on the central node of Eu-DBM(DBM=dibenzoylmethane)sensor in the form of single ion at ultralow concentration.Subsequently,the pathways of photo-induced charge and energy transfer of the obtained Eu-DBM@Fe^(3+)material have been changed,from the initial DBM-to-Eu^(3+)before Fe^(3+)adsorption to the ultimate DBM-to-Fe^(3+)after adsorption process,which quenches the luminescence of Eu3+ion.This work not only obtains the highly sensitive luminescence detection ability,but also innovatively proposes the single-ion adsorption mechanism,both of which have important scientific and application values for the development of more efficient detection agents in the future.
基金supported by the National Natural Science Foundation of China(No.21771061)Outstanding Youth Fund of Heilongjiang Province(No.JQ 2020B002).
文摘Designing photocatalysts with high light utilization and efficient photogenerated carrier separation for pollutant degradation is one of the important topics for sustainable development.In this study,hierarchical core–shell materialα-Fe_(2)O_(3)@ZnIn_(2)S_(4)with a step-scheme(S-scheme)heterojunction is synthesized by in situ growth technique,and MXene Ti_(3)C_(2)quantum dots(QDs)are introduced to construct a double-heterojunction tandem mechanism.The photodegradation efficiency ofα-Fe_(2)O_(3)@ZnIn_(2)S_(4)/Ti_(3)C_(2)QDs to bisphenol A is 96.1%and its reaction rate constant attained 0.02595 min^(−1),which is 12.3 times that of pureα-Fe_(2)O_(3).Meanwhile,a series of characterizations analyze the reasons for the enhanced photocatalytic activity,and the charge transport path of the S-scheme heterojunction/Schottky junction tandem is investigated.The construction of the S-scheme heterojunction enables the photo-generated electrons ofα-Fe_(2)O_(3)and the holes of ZnIn2S4 to transfer and combine under the action of the reverse built-in electric field.Due to the metallic conductivity of Ti_(3)C_(2)QDs,the photogenerated electrons of ZnIn_(2)S_(4)are further transferred to Ti_(3)C_(2)QDs to form a Schottky junction,which in turn forms a double-heterojunction tandem mechanism,showing a remarkable charge separation efficiency.This work provides a new opinion for the construction of tandem double heterojunctions to degrade harmful pollutants.
