With the ongoing depletion of fossil fuels,energy and environmental issues have become increasingly critical,necessitating the search for effective solutions.Catalysis,being one of the hallmarks of modern industry,off...With the ongoing depletion of fossil fuels,energy and environmental issues have become increasingly critical,necessitating the search for effective solutions.Catalysis,being one of the hallmarks of modern industry,offers a promising avenue for researchers.However,the question of how to significantly enhance the performance of catalysts has gradually drawn the attention of scholars.Defect engineering,a commonly employed and effective approach to improve catalyst activity,has become a significant research focus in the catalysis field in recent years.Nonmetal vacancies have received extensive attention due to their simple form.Consequently,exploration of metal vacancies has remained stagnant for a considerable period,resulting in a scarcity of comprehensive reviews on this topic.Therefore,based on the latest research findings,this paper summarizes and consolidates the construction strategies for metal vacancies,characterization techniques,and their roles in typical energy and environmental catalytic reactions.Additionally,it outlines potential challenges in the future,aiming to provide valuable references for researchers interested in investigating metal vacancies.展开更多
A new role hierarchy model for RBAC (role-based access control) is presented and its features are illustrated through examples. Some new concepts such as private permission, public permission and special permission ar...A new role hierarchy model for RBAC (role-based access control) is presented and its features are illustrated through examples. Some new concepts such as private permission, public permission and special permission are introduced, based on the RRA97 model. Some new role-role inheriting forms such as normal inheritance, private inheritance, public inheritance and special-without inheritance are defined. Based on the ideas mentioned, the new role hierarchy model is formulated. It is easier and more comprehensible to describe role-role relationships through the new model than through the traditional ones. The new model is closer to the real world and its mechanism is more powerful. Particularly it is more suitable when used in large-scale role hierarchies.展开更多
In the present competitive society, English becomes more and more important, and how to master English becomes one popular topic for everyone. English is a communicative tool, however, traditional teaching method used...In the present competitive society, English becomes more and more important, and how to master English becomes one popular topic for everyone. English is a communicative tool, however, traditional teaching method used in English teaching is not very suitable, and the traditional teaching is very boring and inefficient. The traditional teaching does not give students a real world situation to practice their English speaking and it does not cultivate their learning interests. This phenomenon continued in the students English learning for many years, and students can not use the English to communicate in their daily life. This phenomenon appears in oral English teaching in college schools as well, In order to solve the problems, the paper firstly describes the problem of English spoken teaching in college schools in Chi na. And then it analyzes the performance of problem and the cause of problems. The aim is that we find the problem and deficiency of Eng lish spoken teaching in college schools and use Role play as an effective way to solve these problems. Moreover, how to uses the role play specifically in the spoken English teaching, So that the role play can help teacher change traditional teaching method, enhance students’ oral communication ability, cultivate the students’learning interests and improve spoken English teaching in colleges.展开更多
Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.The...Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.Therefore,it is difficult to make the rotor rotate and be fully levitated simultaneously.To solve this problem,two different role division control strategies are proposed in this paper,i.e.individual role division and mutual role division control strategies.The difference between them is the selection of motor which controls the torque or the axial force.In order to understand the characteristics of control variables,the principle and mathematical model of CBSRM are introduced.After that,two control strategies are explained in detail.To verify the demonstrated performance,the simulations are completed with MATLAB/Simulink.展开更多
Under the background of the globalization and the possibility of Internet-based virtual reality, online education gradually becomes a trend of today's teaching method. As one aspect of computer assisted language l...Under the background of the globalization and the possibility of Internet-based virtual reality, online education gradually becomes a trend of today's teaching method. As one aspect of computer assisted language learning, online education in China has drawn the attention of educators, experts, teachers, and learners. However, the studies in the role of instructors in online education in China are still limited. So, this paper will try to research and rethink the instructor role in online education, aiming to recommend some applicable measures to improve the current situation of online education.展开更多
Apparent discrepancy exists between Schmidt's Noticing Hypothesis and Krashen's Input Hypothesis. Whilst Krashen highlights the importance of comprehensible input and asserts that language is acquired unconcio...Apparent discrepancy exists between Schmidt's Noticing Hypothesis and Krashen's Input Hypothesis. Whilst Krashen highlights the importance of comprehensible input and asserts that language is acquired unconciously, the notion of conscious learning has gained wide support from Schmidt and other researchers. They argue that noticing enhances second language development as one crucial level of consciousness. By reviewing the theoretical constructs that underlie the role of noticing, this paper aims to justify the role of noticing as one crucial level of consciousness in enhancing second language learning.展开更多
In the linguistic field,L1transfer is a complex and controversial field in second language acquisition.In this article,Firstly,it will discuss some historical theories of L1 transfer.Secondly,it will analyze some mani...In the linguistic field,L1transfer is a complex and controversial field in second language acquisition.In this article,Firstly,it will discuss some historical theories of L1 transfer.Secondly,it will analyze some manifestations of L1 transfer.Thirdly,it will explain the struc tural and the nonstructural factors in L1 transfer.Fourthly,it will discuss the problems in the study of L1transfer.Finally,it will give some my opinions of L1transfer.展开更多
Presently,a growing number of analysis of reading are paying particular attention to the use that a reader must make of reading strategy prediction in one reading material.Reading strategy prediction plays every impor...Presently,a growing number of analysis of reading are paying particular attention to the use that a reader must make of reading strategy prediction in one reading material.Reading strategy prediction plays every important role in reading comprehension.Reading is impossible without prediction.A cluster analysis on the importance of this reading strategy is demonstrated in this paper.The aim of this paper is to demonstrate that prediction is essential for reading.According to the author’s research in this paper,reading beginners who practice prediction in reading routinely are very likely to become fluent readers.展开更多
Access control in a grid environment is a challenging issue because the heterogeneous nature and independent administration of geographically dispersed resources in grid require access control to use fine-grained poli...Access control in a grid environment is a challenging issue because the heterogeneous nature and independent administration of geographically dispersed resources in grid require access control to use fine-grained policies. We established a task-and-role-based access-control model for computational grid (CG-TRBAC model), integrating the concepts of role-based access control (RBAC) and task-based access control (TBAC). In this model, condition restrictions are defined and concepts specifically tailored to Workflow Management System are simplified or omitted so that role assignment and security administration fit computational grid better than traditional models; permissions are mutable with the task status and system variables, and can be dynamically controlled. The CG-TRBAC model is proved flexible and extendible. It can implement different control policies. It embodies the security principle of least privilege and executes active dynamic authorization. A task attribute can be extended to satisfy different requirements in a real grid system.展开更多
Role-play is considered as a useful method to solve the problem of oral English teaching in universities. It's much more than a performance that learners can experience the real life in the classroom. Through its ...Role-play is considered as a useful method to solve the problem of oral English teaching in universities. It's much more than a performance that learners can experience the real life in the classroom. Through its use in the pre-playing,whileplaying and post-playing stages in universities,its effects will be presented in an overall way: students can gain more communication skills in the mini society atmosphere,and the accuracy and fluency of their oral English will be improved. Although some factors may affect the effects of role-play use in oral English teaching in universities,with the better use of role-play in the future,the goal of oral English teaching will be realized.展开更多
Motivation has important implications for learning. As College English teachers, knowing how to promote the motivation of learners will push learners to engage actively and productively in learning activities. There a...Motivation has important implications for learning. As College English teachers, knowing how to promote the motivation of learners will push learners to engage actively and productively in learning activities. There are three aspects about enhancing motivation.展开更多
The project delves into the preliminary findings of a survey of both trainers and students on the practice of using student peer feedback in interpreting practice.It first explains the theoretical foundation which jus...The project delves into the preliminary findings of a survey of both trainers and students on the practice of using student peer feedback in interpreting practice.It first explains the theoretical foundation which justifies the use of peer feedback in interpreting practice,the research methodology and data collection.Then it brings forth specific findings concerning the implementation of peer feedback in the interpreting class followed by discussions of the role and features of student peer feedback as a means to help students ready for the booth.Analysis of the results shows that peer feedback in interpreting practice keeps students on-task,attentive and help them spot their own problems.Trainers and students themselves point to similar features of student peer feedback as focusing on comprehension of the original,word choice and numbers.The preliminary findings of the survey demonstrate the roles and features of student peer feedback in interpreting practice and point to the possible way of enhancing student’s learning curve through more effective peer feedback.展开更多
A specific application of task-based learning in teaching vocabulary to young learners and a complete task cycle using role play to present vocabulary in China's private language school would be described in the s...A specific application of task-based learning in teaching vocabulary to young learners and a complete task cycle using role play to present vocabulary in China's private language school would be described in the study. The participants aged between 7 and 9 are thought to be starters according to their language competence in Common European Framework of Reference for language. The rationale for stages in the task cycle will be fully explored with reference to Piaget and Vygotsky's theory in teaching young learners. The advantages of the adoption of TBL with young learners will be illustrated and some possible problems in implementing TBL in China, a representative country of Confucian-heritage culture would also be discussed in the paper. The study indicates that young learners in China are quite welcome this new approach in their English classes, but the targeted learners' age and background information need to be taken into consideration when actually implement this approach.展开更多
under the present educational reform backgrounds,college English teachers are expected to re-examine their role,shift their mind-sets from the traditional passive position of acceptors of educational theory to creator...under the present educational reform backgrounds,college English teachers are expected to re-examine their role,shift their mind-sets from the traditional passive position of acceptors of educational theory to creator of their own local teaching theories.展开更多
English speaking has been paid more attention today, especially in the age of globalization. Teachers are attempting to find out more effective methods to enhance the teaching results of English speaking. Facing the g...English speaking has been paid more attention today, especially in the age of globalization. Teachers are attempting to find out more effective methods to enhance the teaching results of English speaking. Facing the great demands and present difficulties of oral English classes, teachers have to conduct more study and practice to find out what roles that an oral English teacher has to take in the oral English classroom. Compared with the traditional teaching role in the English classroom, an oral English teacher has to fulfill more than one role in the classroom teaching so as to provide better learning conditions for students. Lacking more exposure to the real interaction with native speakers, students expect the oral English teacher to be a creator of the language environment. With various teaching and learning activities in the oral English classroom, the teacher has to be a good organizer to ensure every student to achieve improvement. An oral English teacher also has to correct students'language errors while ensuring the smooth progress of the classroom teaching. Only when an oral English teacher make clear what roles he or she has to take in the classroom can he or she achieve effective teaching.展开更多
The paper considers the role of the ESP (English for Specific Purposes) teacher, in particular, to consider in what ways the ESP teacher's lot differs from that of the General English teacher. And finally it provi...The paper considers the role of the ESP (English for Specific Purposes) teacher, in particular, to consider in what ways the ESP teacher's lot differs from that of the General English teacher. And finally it provides information about resources to help the ESP teacher.展开更多
It is commonly known that writing is an advanced skill which is essential in language learning but at the same time the most difficult task for learners. This paper is with the aim to explore helpful roles that teache...It is commonly known that writing is an advanced skill which is essential in language learning but at the same time the most difficult task for learners. This paper is with the aim to explore helpful roles that teacher can play to help non-English major students improve their English writing, so as to help improve their writing ability in the author's context.展开更多
Role-play is recommended as a useful method to solve the problem of oral English teaching. It's much more than a performance and it can be considered as a way to vary the kinds of spoken interaction that learners ...Role-play is recommended as a useful method to solve the problem of oral English teaching. It's much more than a performance and it can be considered as a way to vary the kinds of spoken interaction that learners can experience in the classroom of universities. Through the use of role-play, oral English teaching becomes more interesting and attractive; university students can gain more oral English skills in the mini society atmosphere, and the accuracy and fluency of their oral English will be improved.展开更多
As a new member of carbon material family, carbon quantum dots (CQDs) have attracted tremendous attentions for their potentials in the heterogeneous photocatalysis applications. Due to the unique microstructure and op...As a new member of carbon material family, carbon quantum dots (CQDs) have attracted tremendous attentions for their potentials in the heterogeneous photocatalysis applications. Due to the unique microstructure and optical properties, the roles of CQDs played in the CQDs-based photocatalytic systems have been found to be diverse with the continuous researches in this regard. Herein, we provide a concise minireview to elaborate the multifarious roles of CQDs in photocatalysis, including photoelectron mediator and acceptor, photosensitizer, photocatalyst, reducing agent for metal salt, enhancing adsorption capacity and spectral converter. In addition, the perspectives on future research trends and challenges are proposed, which are anticipated to stimulate further research into this promising field on designing a variety of efficient CQDs-based photocatalysts for solar energy conversion. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B. V. and Science Press. All rights reserved.展开更多
Direct partial oxidation of methane to methanol was investigated in a specially designed reactor. Methanol yield of about 7%-8% was obtained in gas phase partial oxidation. It was proposed that the reactor could be di...Direct partial oxidation of methane to methanol was investigated in a specially designed reactor. Methanol yield of about 7%-8% was obtained in gas phase partial oxidation. It was proposed that the reactor could be divided into three reaction zones, namely pre-reaction zone, fierce reaction zone, and post-reaction zone, when the temperature was high enough to initiate a reaction. The oxidation of methane proceeded and was completed mostly in the fierce reaction zone. When the reactant mixture entered the post-reaction zone, only a small amount of produced methanol would bring about secondary reactions, because molecular oxygen had been exhausted in the fierce reaction zone. A catalyst, if necessary, should be placed either in the pre-reaction zone, to initiate a partial oxidation reaction at a lower temperature, or in the fierce reaction zone to control the homogeneous free radical reaction.展开更多
基金financially supported by National Key R&D Program of China(2021YFB3500702)National Natural Science Foundation of China(Nos.21677010 and 51808037)Special fund of Beijing Key Laboratory of Indoor Air Quality Evaluation and Control(No.BZ0344KF21-04).
文摘With the ongoing depletion of fossil fuels,energy and environmental issues have become increasingly critical,necessitating the search for effective solutions.Catalysis,being one of the hallmarks of modern industry,offers a promising avenue for researchers.However,the question of how to significantly enhance the performance of catalysts has gradually drawn the attention of scholars.Defect engineering,a commonly employed and effective approach to improve catalyst activity,has become a significant research focus in the catalysis field in recent years.Nonmetal vacancies have received extensive attention due to their simple form.Consequently,exploration of metal vacancies has remained stagnant for a considerable period,resulting in a scarcity of comprehensive reviews on this topic.Therefore,based on the latest research findings,this paper summarizes and consolidates the construction strategies for metal vacancies,characterization techniques,and their roles in typical energy and environmental catalytic reactions.Additionally,it outlines potential challenges in the future,aiming to provide valuable references for researchers interested in investigating metal vacancies.
文摘A new role hierarchy model for RBAC (role-based access control) is presented and its features are illustrated through examples. Some new concepts such as private permission, public permission and special permission are introduced, based on the RRA97 model. Some new role-role inheriting forms such as normal inheritance, private inheritance, public inheritance and special-without inheritance are defined. Based on the ideas mentioned, the new role hierarchy model is formulated. It is easier and more comprehensible to describe role-role relationships through the new model than through the traditional ones. The new model is closer to the real world and its mechanism is more powerful. Particularly it is more suitable when used in large-scale role hierarchies.
文摘In the present competitive society, English becomes more and more important, and how to master English becomes one popular topic for everyone. English is a communicative tool, however, traditional teaching method used in English teaching is not very suitable, and the traditional teaching is very boring and inefficient. The traditional teaching does not give students a real world situation to practice their English speaking and it does not cultivate their learning interests. This phenomenon continued in the students English learning for many years, and students can not use the English to communicate in their daily life. This phenomenon appears in oral English teaching in college schools as well, In order to solve the problems, the paper firstly describes the problem of English spoken teaching in college schools in Chi na. And then it analyzes the performance of problem and the cause of problems. The aim is that we find the problem and deficiency of Eng lish spoken teaching in college schools and use Role play as an effective way to solve these problems. Moreover, how to uses the role play specifically in the spoken English teaching, So that the role play can help teacher change traditional teaching method, enhance students’ oral communication ability, cultivate the students’learning interests and improve spoken English teaching in colleges.
基金supported by the National Natural Science Foundations of China (Nos. 51877107,51577087,51477074)
文摘Although the five-degree-of-freedom magnetic levitation system composed of two conical bearingless switched reluctance motors(CBSRMs)owns the simplest structure,the torque and levitation forces are coupled greatly.Therefore,it is difficult to make the rotor rotate and be fully levitated simultaneously.To solve this problem,two different role division control strategies are proposed in this paper,i.e.individual role division and mutual role division control strategies.The difference between them is the selection of motor which controls the torque or the axial force.In order to understand the characteristics of control variables,the principle and mathematical model of CBSRM are introduced.After that,two control strategies are explained in detail.To verify the demonstrated performance,the simulations are completed with MATLAB/Simulink.
文摘Under the background of the globalization and the possibility of Internet-based virtual reality, online education gradually becomes a trend of today's teaching method. As one aspect of computer assisted language learning, online education in China has drawn the attention of educators, experts, teachers, and learners. However, the studies in the role of instructors in online education in China are still limited. So, this paper will try to research and rethink the instructor role in online education, aiming to recommend some applicable measures to improve the current situation of online education.
文摘Apparent discrepancy exists between Schmidt's Noticing Hypothesis and Krashen's Input Hypothesis. Whilst Krashen highlights the importance of comprehensible input and asserts that language is acquired unconciously, the notion of conscious learning has gained wide support from Schmidt and other researchers. They argue that noticing enhances second language development as one crucial level of consciousness. By reviewing the theoretical constructs that underlie the role of noticing, this paper aims to justify the role of noticing as one crucial level of consciousness in enhancing second language learning.
文摘In the linguistic field,L1transfer is a complex and controversial field in second language acquisition.In this article,Firstly,it will discuss some historical theories of L1 transfer.Secondly,it will analyze some manifestations of L1 transfer.Thirdly,it will explain the struc tural and the nonstructural factors in L1 transfer.Fourthly,it will discuss the problems in the study of L1transfer.Finally,it will give some my opinions of L1transfer.
文摘Presently,a growing number of analysis of reading are paying particular attention to the use that a reader must make of reading strategy prediction in one reading material.Reading strategy prediction plays every important role in reading comprehension.Reading is impossible without prediction.A cluster analysis on the importance of this reading strategy is demonstrated in this paper.The aim of this paper is to demonstrate that prediction is essential for reading.According to the author’s research in this paper,reading beginners who practice prediction in reading routinely are very likely to become fluent readers.
基金Funded by the Natural Science Foundation of China under Grant Nos. 60503040 and 60403027.
文摘Access control in a grid environment is a challenging issue because the heterogeneous nature and independent administration of geographically dispersed resources in grid require access control to use fine-grained policies. We established a task-and-role-based access-control model for computational grid (CG-TRBAC model), integrating the concepts of role-based access control (RBAC) and task-based access control (TBAC). In this model, condition restrictions are defined and concepts specifically tailored to Workflow Management System are simplified or omitted so that role assignment and security administration fit computational grid better than traditional models; permissions are mutable with the task status and system variables, and can be dynamically controlled. The CG-TRBAC model is proved flexible and extendible. It can implement different control policies. It embodies the security principle of least privilege and executes active dynamic authorization. A task attribute can be extended to satisfy different requirements in a real grid system.
文摘Role-play is considered as a useful method to solve the problem of oral English teaching in universities. It's much more than a performance that learners can experience the real life in the classroom. Through its use in the pre-playing,whileplaying and post-playing stages in universities,its effects will be presented in an overall way: students can gain more communication skills in the mini society atmosphere,and the accuracy and fluency of their oral English will be improved. Although some factors may affect the effects of role-play use in oral English teaching in universities,with the better use of role-play in the future,the goal of oral English teaching will be realized.
文摘Motivation has important implications for learning. As College English teachers, knowing how to promote the motivation of learners will push learners to engage actively and productively in learning activities. There are three aspects about enhancing motivation.
文摘The project delves into the preliminary findings of a survey of both trainers and students on the practice of using student peer feedback in interpreting practice.It first explains the theoretical foundation which justifies the use of peer feedback in interpreting practice,the research methodology and data collection.Then it brings forth specific findings concerning the implementation of peer feedback in the interpreting class followed by discussions of the role and features of student peer feedback as a means to help students ready for the booth.Analysis of the results shows that peer feedback in interpreting practice keeps students on-task,attentive and help them spot their own problems.Trainers and students themselves point to similar features of student peer feedback as focusing on comprehension of the original,word choice and numbers.The preliminary findings of the survey demonstrate the roles and features of student peer feedback in interpreting practice and point to the possible way of enhancing student’s learning curve through more effective peer feedback.
文摘A specific application of task-based learning in teaching vocabulary to young learners and a complete task cycle using role play to present vocabulary in China's private language school would be described in the study. The participants aged between 7 and 9 are thought to be starters according to their language competence in Common European Framework of Reference for language. The rationale for stages in the task cycle will be fully explored with reference to Piaget and Vygotsky's theory in teaching young learners. The advantages of the adoption of TBL with young learners will be illustrated and some possible problems in implementing TBL in China, a representative country of Confucian-heritage culture would also be discussed in the paper. The study indicates that young learners in China are quite welcome this new approach in their English classes, but the targeted learners' age and background information need to be taken into consideration when actually implement this approach.
文摘under the present educational reform backgrounds,college English teachers are expected to re-examine their role,shift their mind-sets from the traditional passive position of acceptors of educational theory to creator of their own local teaching theories.
文摘English speaking has been paid more attention today, especially in the age of globalization. Teachers are attempting to find out more effective methods to enhance the teaching results of English speaking. Facing the great demands and present difficulties of oral English classes, teachers have to conduct more study and practice to find out what roles that an oral English teacher has to take in the oral English classroom. Compared with the traditional teaching role in the English classroom, an oral English teacher has to fulfill more than one role in the classroom teaching so as to provide better learning conditions for students. Lacking more exposure to the real interaction with native speakers, students expect the oral English teacher to be a creator of the language environment. With various teaching and learning activities in the oral English classroom, the teacher has to be a good organizer to ensure every student to achieve improvement. An oral English teacher also has to correct students'language errors while ensuring the smooth progress of the classroom teaching. Only when an oral English teacher make clear what roles he or she has to take in the classroom can he or she achieve effective teaching.
文摘The paper considers the role of the ESP (English for Specific Purposes) teacher, in particular, to consider in what ways the ESP teacher's lot differs from that of the General English teacher. And finally it provides information about resources to help the ESP teacher.
文摘It is commonly known that writing is an advanced skill which is essential in language learning but at the same time the most difficult task for learners. This paper is with the aim to explore helpful roles that teacher can play to help non-English major students improve their English writing, so as to help improve their writing ability in the author's context.
文摘Role-play is recommended as a useful method to solve the problem of oral English teaching. It's much more than a performance and it can be considered as a way to vary the kinds of spoken interaction that learners can experience in the classroom of universities. Through the use of role-play, oral English teaching becomes more interesting and attractive; university students can gain more oral English skills in the mini society atmosphere, and the accuracy and fluency of their oral English will be improved.
基金financial support from the key project of the National Natural Science Foundation of China (U1463204)the project of National Natural Science Foundation of China (NSFC) (20903023,21173045)+4 种基金the Award Program for Minjiang Scholar Professorshipthe Natural Science Foundation (NSF) of Fujian Province for Distinguished Young Investigator Grant (2012J06003)the Independent Research Project of State Key Laboratory of Photocatalysis on Energy and Environment (No.2014A05)the 1st Program of Fujian Province for Top Creative Young Talentsthe Program for Returned High-Level Overseas Chinese Scholars of Fujian Province
文摘As a new member of carbon material family, carbon quantum dots (CQDs) have attracted tremendous attentions for their potentials in the heterogeneous photocatalysis applications. Due to the unique microstructure and optical properties, the roles of CQDs played in the CQDs-based photocatalytic systems have been found to be diverse with the continuous researches in this regard. Herein, we provide a concise minireview to elaborate the multifarious roles of CQDs in photocatalysis, including photoelectron mediator and acceptor, photosensitizer, photocatalyst, reducing agent for metal salt, enhancing adsorption capacity and spectral converter. In addition, the perspectives on future research trends and challenges are proposed, which are anticipated to stimulate further research into this promising field on designing a variety of efficient CQDs-based photocatalysts for solar energy conversion. (C) 2016 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B. V. and Science Press. All rights reserved.
文摘Direct partial oxidation of methane to methanol was investigated in a specially designed reactor. Methanol yield of about 7%-8% was obtained in gas phase partial oxidation. It was proposed that the reactor could be divided into three reaction zones, namely pre-reaction zone, fierce reaction zone, and post-reaction zone, when the temperature was high enough to initiate a reaction. The oxidation of methane proceeded and was completed mostly in the fierce reaction zone. When the reactant mixture entered the post-reaction zone, only a small amount of produced methanol would bring about secondary reactions, because molecular oxygen had been exhausted in the fierce reaction zone. A catalyst, if necessary, should be placed either in the pre-reaction zone, to initiate a partial oxidation reaction at a lower temperature, or in the fierce reaction zone to control the homogeneous free radical reaction.
