Affect plays a significant role in college English teaching and learning, in which teachers, learners, tasks and contexts or environments interact with each other, developing a system of affective interaction. In the ...Affect plays a significant role in college English teaching and learning, in which teachers, learners, tasks and contexts or environments interact with each other, developing a system of affective interaction. In the system, the teacher is a facilitator and mediator and the learner is the subject of English learning. In a harmonious and friendly classroom environment, with the knowledge transmission blending in well with the cultivation of affect, attitudes and values, students＇ cognitive and emotional development can be promoted. The experimental results of the present study indicated that students in the affective college English classroom did significantly better （p〈 .05） in cognition than before. Furthermore, the analyses of the two surveys showed that attention to affective interaction in college English teaching helped students enhance their interest in college English learning, cross-cultural awareness, self-confidence, interpersonal intelligence, and so forth. Therefore, our conclusion is that attention to affective interaction in college English classroom teaching is conducive to students＇ personal growth and a more holistic development.展开更多
In order to realize spacecraft autonomy activity duration and complex temporal relations must be taken into consideration. In the space mission planning system, the traditional planners are unable to describe this kno...In order to realize spacecraft autonomy activity duration and complex temporal relations must be taken into consideration. In the space mission planning system, the traditional planners are unable to describe this knowledge, so an object-oriented temporal knowledge representation method is proposed to model every activity as an object to describe the activity's duration, start-time, end-time and the temporal relations with other activities. The layered planning agent architecture is then designed for spacecraft autonomous operation, and the functions of every component are given. A planning algorithm based on the temporal constraint satisfaction is built in detail using this knowledge representation and system architecture. The prototype of Deep Space Mission Autonomous Planning System is implemented. The results show that with the object-oriented temporal knowledge description method, the space mission planning system can be used to describe simultaneous activities, resource and temporal constraints, and produce a complete plan for exploration mission quickly under complex constraints.展开更多
Objective To identify the status of knowledge,attitude,and behaviour toward evidence-based practice(EBP)among Chinese psychiatric nurses,and to examine the influencing factors of EBP behaviour.Methods We utilised a cr...Objective To identify the status of knowledge,attitude,and behaviour toward evidence-based practice(EBP)among Chinese psychiatric nurses,and to examine the influencing factors of EBP behaviour.Methods We utilised a cross-sectional design.A total of 923 psychiatric nurses from 168 hospitals in 27 provinces in the mainland of China participated in our survey.The EBP questionnaire,the barriers to research utilisation scale and the facilitators to research utilisation scale were used for data collection via WeChat group from July 2018 to April 2019.Multiple regression analysis was used to analyse the influencing factors of psychiatric nurses’evidence-based practice behaviour.Results The score of Chinese psychiatric nurses’EBP attitude,behaviour and knowledge were 4.81±1.34,4.11±1.36 and 3.53±1.29,respectively.Multiple regression analysis showed that nurses’EBP behaviour was mainly determined by knowledge and attitude,which together explained 61.8%of the variance.The two top barriers were the dimensions of presentation and research.Facilitators include managerial support,employing nurses with research skills as models and providing advanced education on evidence-based nursing.Conclusion Psychiatric nurses have positive attitudes toward EBP,but their level of knowledge and behaviour is insufficient.Heavy workload,insufficient time,and a lack of knowledge and skills is the main barrier.Managerial support,employing nurses with research skills as models and providing advanced education are the main facilitators.展开更多
Twelve samples with periodic array square pillars microstructure were prepared on the silicon wafer by plasma etching techniques, on which space b of the square pillars increased from 5 to 60 μm. In order to study th...Twelve samples with periodic array square pillars microstructure were prepared on the silicon wafer by plasma etching techniques, on which space b of the square pillars increased from 5 to 60 μm. In order to study the effect ofb on the wettability of the rough surface, the effects of apparent contact angle （CA） and sliding angle （a） of the droplet on the rough surface were measured with the contact angle meter. The results show that the experimental values of CA well agree with the classical wetting theory and a decreases with the increase of b. Two drop shapes exist on the samples＇ surface, corresponding to the Cassie state and the Wenzel state respectively. The contact state in which a drop would settle depends typically on the size of b. On the role of gravitation, the irreversible transition of a drop from Cassie state to Wenzel state should occur at a certain space of the square pillars. Since the transition has implications on the application of super-hydrophobic rough surfaces, theoretically, the prediction of wetting state transition on square pillar array micro-structured surfaces provides an intuitionistic guidance for the design of steady superhydrophobic surfaces.展开更多
The top relief surfaces of an hourglass worm gear hob are ground manually in the traditional manufacturing process,which cannot ensure the width of the land surfaces of the hob.Moreover,each geometric feature of the h...The top relief surfaces of an hourglass worm gear hob are ground manually in the traditional manufacturing process,which cannot ensure the width of the land surfaces of the hob.Moreover,each geometric feature of the hob has been produced through different manufacturing techniques and machine tools,which results in low efficiency.To solve this problem,we propose a semi-automatic computer aided design(CAD)method for hobs.The point clouds of each feature surface of a hob are calculated by combing mathematical equations of the top relief surfaces built by the proposed method with other existing equations of hob surfaces.According to the point clouds,the method can achieve the automatic modeling for the hob in three-dimensional(3D)software by classifying and extracting the parameter information of the feature-hierarchical knowledge of the hob.Based on the generated 3D model,the entire surfaces of the hob can be manufactured on a four-axis computer numerical control(CNC)milling machine through only twice clamping.Verification of the width of the land surface of the hob manufactured by semi-automatic CAD method on a measuring projector proved the precision of the designed width can be ensured.The edge of the contact area on the worm wheel in a meshing experiment is clear and distinct,which means the worm gear drive is meshed well and the hob manufactured by the proposed method has improved machinability.The method simplifies the processing technique,and improves the design efficiency and production accuracy.展开更多
A novel unknown input reduced-order observer (UIRO) design scheme is presented. It is proved that unknown input appearing in measurement can be eliminated by a simple algebraic transformation. Then, a new UIRO design ...A novel unknown input reduced-order observer (UIRO) design scheme is presented. It is proved that unknown input appearing in measurement can be eliminated by a simple algebraic transformation. Then, a new UIRO design scheme is proposed via a transformation under no unknown input existing in measurement. Compared with other known results, the condition is weaker than others. So it was further reasonable. The design procedure proposed is simple and straightforward enough to be applied. An example is given to show its efficiency in fault diagnosis.展开更多
Due to the shortages of natural sands along the east coast of Australia in particular and the need to fully utilise fines produced in quarry operations, progress has been made in utilising blends of manufactured sands...Due to the shortages of natural sands along the east coast of Australia in particular and the need to fully utilise fines produced in quarry operations, progress has been made in utilising blends of manufactured sands and natural sands in concrete pavements. This paper documents some of the constraints in utilising larger proportions of manufactured sands in concrete pavements. These constraints are mainly caused by the current level of knowledge regarding the impact of manufactured sands on skid and abrasion resistance of concrete pavements. This paper presents a brief review of literature on this subject in the USA, France and UK. It also briefly documents work recently carried out in Australia by CCAA （Cement Concrete and Aggregates Australia）, referring to the skid and abrasion resistance of concrete pavements using manufactured sands. The paper concludes that there is no relationship between the free silica content and the skid resistance. With regard to the abrasion resistance, it is rather the curing conditions and the compressive strength that are more important in achieving good results.展开更多
With the advent of the informatian age, people are working to build a new knowledge network, knowledge of the past gradually pieced together again. The new knowledge network includes not only advanced science and tech...With the advent of the informatian age, people are working to build a new knowledge network, knowledge of the past gradually pieced together again. The new knowledge network includes not only advanced science and technology, but also includes the historical and cultural value, emotion and sense of innovation. Graphic design is a spiritual and material reality and artistic, aesthetic and practical disciplines integrated with each other. Always take the old approach to their creative confined in a narrow space, and this will inevitably lead to failure. Graphic design must rely on the sense of innovation, combined with the image of abstract thinking; ideas can really create unique designs. Therefore, to enhance training in graphic design innovative design capabilities, innovation and the development of graphic design is an important issue. In this paper, graphic design requirements and the role of innovation capacity will be explared, and the method of application of proposed innovative thinking in graphic design process will be provided.展开更多
Smart grids have the characteristics of being observable,controllable,adaptive,self-healing,embedded independent processing,and real-time analysis.With the development of smart grids,constructing a grid to cover globa...Smart grids have the characteristics of being observable,controllable,adaptive,self-healing,embedded independent processing,and real-time analysis.With the development of smart grids,constructing a grid to cover global,unified information systems,which should be adapted to fulf ill the requirements of the characteristics,is essential.This paper presents an service-oriented architecture(SOA)for smart grid information-engineering systems based on knowledge grid,which could form as a service-oriented architecture through business,technology and management;it would extract potentially valuable information from the massive amount of information on the generation side,the grid side,and the electricity side,then share the useful information to improve availability,security and stability.展开更多
OBJECTIVE: To study cognitive function and cerebral metabolic changes in patients with transient global amnesia (TGA). METHODS: Three patients with TGA were given mini-mental state examination (MMSE), revised Wechsler...OBJECTIVE: To study cognitive function and cerebral metabolic changes in patients with transient global amnesia (TGA). METHODS: Three patients with TGA were given mini-mental state examination (MMSE), revised Wechsler memory scale (WMS-R) examination and magnetic resonance imaging (MRI) scans after they had been diagnosed as TGA. Using (18)F labelled deoxyglucose as tracer, patients were given a positron emission tomography (PET) examination at different periods during recovery. RESULTS: No obvious abnormality was found in MMSE and MRI scans in the three patients. However, WMS-R examination and cerebral PET imaging displayed cognitive dysfunction of varying degrees and low metabolism in local areas related to memory in 2 of 3 patients. CONCLUSIONS: In TGA patients, cognitive function and cerebral metabolic levels are closely correlated with duration of symptoms. It is necessary to stop the TGA attack as quickly as possible early time.展开更多
The Portrait of Dora Maar（92 cm×65 cm）painted by Pablo Picasso（1937）is an aesthetic masterpiece in the world（Brigitte,1996）.Picasso paints Dora seating on a chair in frontal view with an off-set profile and...The Portrait of Dora Maar（92 cm×65 cm）painted by Pablo Picasso（1937）is an aesthetic masterpiece in the world（Brigitte,1996）.Picasso paints Dora seating on a chair in frontal view with an off-set profile and disjunctive facial features（André,1976）：that is,Dora’s nose becomes an extension of her face on which the＂far＂eye is seen looking straight at us.Why did Picasso paint his lover Dora in such a tortured style？展开更多
文摘Affect plays a significant role in college English teaching and learning, in which teachers, learners, tasks and contexts or environments interact with each other, developing a system of affective interaction. In the system, the teacher is a facilitator and mediator and the learner is the subject of English learning. In a harmonious and friendly classroom environment, with the knowledge transmission blending in well with the cultivation of affect, attitudes and values, students＇ cognitive and emotional development can be promoted. The experimental results of the present study indicated that students in the affective college English classroom did significantly better （p〈 .05） in cognition than before. Furthermore, the analyses of the two surveys showed that attention to affective interaction in college English teaching helped students enhance their interest in college English learning, cross-cultural awareness, self-confidence, interpersonal intelligence, and so forth. Therefore, our conclusion is that attention to affective interaction in college English classroom teaching is conducive to students＇ personal growth and a more holistic development.
文摘In order to realize spacecraft autonomy activity duration and complex temporal relations must be taken into consideration. In the space mission planning system, the traditional planners are unable to describe this knowledge, so an object-oriented temporal knowledge representation method is proposed to model every activity as an object to describe the activity's duration, start-time, end-time and the temporal relations with other activities. The layered planning agent architecture is then designed for spacecraft autonomous operation, and the functions of every component are given. A planning algorithm based on the temporal constraint satisfaction is built in detail using this knowledge representation and system architecture. The prototype of Deep Space Mission Autonomous Planning System is implemented. The results show that with the object-oriented temporal knowledge description method, the space mission planning system can be used to describe simultaneous activities, resource and temporal constraints, and produce a complete plan for exploration mission quickly under complex constraints.
基金This study was supported by Chinese nursing management scientific research fund(CNM-2017-09).
文摘Objective To identify the status of knowledge,attitude,and behaviour toward evidence-based practice(EBP)among Chinese psychiatric nurses,and to examine the influencing factors of EBP behaviour.Methods We utilised a cross-sectional design.A total of 923 psychiatric nurses from 168 hospitals in 27 provinces in the mainland of China participated in our survey.The EBP questionnaire,the barriers to research utilisation scale and the facilitators to research utilisation scale were used for data collection via WeChat group from July 2018 to April 2019.Multiple regression analysis was used to analyse the influencing factors of psychiatric nurses’evidence-based practice behaviour.Results The score of Chinese psychiatric nurses’EBP attitude,behaviour and knowledge were 4.81±1.34,4.11±1.36 and 3.53±1.29,respectively.Multiple regression analysis showed that nurses’EBP behaviour was mainly determined by knowledge and attitude,which together explained 61.8%of the variance.The two top barriers were the dimensions of presentation and research.Facilitators include managerial support,employing nurses with research skills as models and providing advanced education on evidence-based nursing.Conclusion Psychiatric nurses have positive attitudes toward EBP,but their level of knowledge and behaviour is insufficient.Heavy workload,insufficient time,and a lack of knowledge and skills is the main barrier.Managerial support,employing nurses with research skills as models and providing advanced education are the main facilitators.
基金Project(50435030) supported by the National Natural Science foundation of ChinaProject supported by the Program for New Century Excellent Talents in Chinese University Project(GZ080010) supported by the Open Research Fund Program of Jiangsu Province Key Laboratory for Photon Manufacturing Science and Technology
文摘Twelve samples with periodic array square pillars microstructure were prepared on the silicon wafer by plasma etching techniques, on which space b of the square pillars increased from 5 to 60 μm. In order to study the effect ofb on the wettability of the rough surface, the effects of apparent contact angle （CA） and sliding angle （a） of the droplet on the rough surface were measured with the contact angle meter. The results show that the experimental values of CA well agree with the classical wetting theory and a decreases with the increase of b. Two drop shapes exist on the samples＇ surface, corresponding to the Cassie state and the Wenzel state respectively. The contact state in which a drop would settle depends typically on the size of b. On the role of gravitation, the irreversible transition of a drop from Cassie state to Wenzel state should occur at a certain space of the square pillars. Since the transition has implications on the application of super-hydrophobic rough surfaces, theoretically, the prediction of wetting state transition on square pillar array micro-structured surfaces provides an intuitionistic guidance for the design of steady superhydrophobic surfaces.
基金supported by The Development of Design and Manufacturing Technology of Double-Enveloping Worm Pair in High-precision with Little Centre Distance(No.69190135)We would like to thank the Professor Workstation of China Agricultural University in Hebei Baoding Laibo Transmission Machinery Manufacturing Co.LTD(No.20200901).
文摘The top relief surfaces of an hourglass worm gear hob are ground manually in the traditional manufacturing process,which cannot ensure the width of the land surfaces of the hob.Moreover,each geometric feature of the hob has been produced through different manufacturing techniques and machine tools,which results in low efficiency.To solve this problem,we propose a semi-automatic computer aided design(CAD)method for hobs.The point clouds of each feature surface of a hob are calculated by combing mathematical equations of the top relief surfaces built by the proposed method with other existing equations of hob surfaces.According to the point clouds,the method can achieve the automatic modeling for the hob in three-dimensional(3D)software by classifying and extracting the parameter information of the feature-hierarchical knowledge of the hob.Based on the generated 3D model,the entire surfaces of the hob can be manufactured on a four-axis computer numerical control(CNC)milling machine through only twice clamping.Verification of the width of the land surface of the hob manufactured by semi-automatic CAD method on a measuring projector proved the precision of the designed width can be ensured.The edge of the contact area on the worm wheel in a meshing experiment is clear and distinct,which means the worm gear drive is meshed well and the hob manufactured by the proposed method has improved machinability.The method simplifies the processing technique,and improves the design efficiency and production accuracy.
文摘A novel unknown input reduced-order observer (UIRO) design scheme is presented. It is proved that unknown input appearing in measurement can be eliminated by a simple algebraic transformation. Then, a new UIRO design scheme is proposed via a transformation under no unknown input existing in measurement. Compared with other known results, the condition is weaker than others. So it was further reasonable. The design procedure proposed is simple and straightforward enough to be applied. An example is given to show its efficiency in fault diagnosis.
文摘Due to the shortages of natural sands along the east coast of Australia in particular and the need to fully utilise fines produced in quarry operations, progress has been made in utilising blends of manufactured sands and natural sands in concrete pavements. This paper documents some of the constraints in utilising larger proportions of manufactured sands in concrete pavements. These constraints are mainly caused by the current level of knowledge regarding the impact of manufactured sands on skid and abrasion resistance of concrete pavements. This paper presents a brief review of literature on this subject in the USA, France and UK. It also briefly documents work recently carried out in Australia by CCAA （Cement Concrete and Aggregates Australia）, referring to the skid and abrasion resistance of concrete pavements using manufactured sands. The paper concludes that there is no relationship between the free silica content and the skid resistance. With regard to the abrasion resistance, it is rather the curing conditions and the compressive strength that are more important in achieving good results.
文摘With the advent of the informatian age, people are working to build a new knowledge network, knowledge of the past gradually pieced together again. The new knowledge network includes not only advanced science and technology, but also includes the historical and cultural value, emotion and sense of innovation. Graphic design is a spiritual and material reality and artistic, aesthetic and practical disciplines integrated with each other. Always take the old approach to their creative confined in a narrow space, and this will inevitably lead to failure. Graphic design must rely on the sense of innovation, combined with the image of abstract thinking; ideas can really create unique designs. Therefore, to enhance training in graphic design innovative design capabilities, innovation and the development of graphic design is an important issue. In this paper, graphic design requirements and the role of innovation capacity will be explared, and the method of application of proposed innovative thinking in graphic design process will be provided.
文摘Smart grids have the characteristics of being observable,controllable,adaptive,self-healing,embedded independent processing,and real-time analysis.With the development of smart grids,constructing a grid to cover global,unified information systems,which should be adapted to fulf ill the requirements of the characteristics,is essential.This paper presents an service-oriented architecture(SOA)for smart grid information-engineering systems based on knowledge grid,which could form as a service-oriented architecture through business,technology and management;it would extract potentially valuable information from the massive amount of information on the generation side,the grid side,and the electricity side,then share the useful information to improve availability,security and stability.
文摘OBJECTIVE: To study cognitive function and cerebral metabolic changes in patients with transient global amnesia (TGA). METHODS: Three patients with TGA were given mini-mental state examination (MMSE), revised Wechsler memory scale (WMS-R) examination and magnetic resonance imaging (MRI) scans after they had been diagnosed as TGA. Using (18)F labelled deoxyglucose as tracer, patients were given a positron emission tomography (PET) examination at different periods during recovery. RESULTS: No obvious abnormality was found in MMSE and MRI scans in the three patients. However, WMS-R examination and cerebral PET imaging displayed cognitive dysfunction of varying degrees and low metabolism in local areas related to memory in 2 of 3 patients. CONCLUSIONS: In TGA patients, cognitive function and cerebral metabolic levels are closely correlated with duration of symptoms. It is necessary to stop the TGA attack as quickly as possible early time.
基金supported by the External Cooperation Program of BIC, Chinese Academy of Sciences (GJHZ201302): Collaboration between Institute of Biophysics CAS and Queensland Brain Institute, University of Queensland, Australia
文摘The Portrait of Dora Maar（92 cm×65 cm）painted by Pablo Picasso（1937）is an aesthetic masterpiece in the world（Brigitte,1996）.Picasso paints Dora seating on a chair in frontal view with an off-set profile and disjunctive facial features（André,1976）：that is,Dora’s nose becomes an extension of her face on which the＂far＂eye is seen looking straight at us.Why did Picasso paint his lover Dora in such a tortured style？
