Sanchuan ham is appreciated in Yunnan Province,China,for its characteristic flavor and taste,while the microbial community structure and biogenic amines content remain unclear during fermentation processes.In this stu...Sanchuan ham is appreciated in Yunnan Province,China,for its characteristic flavor and taste,while the microbial community structure and biogenic amines content remain unclear during fermentation processes.In this study,we explored the physicochemical property,biogenic amines concentration and microbial diversity of external and internal Sanchuan ham by high-throughput sequencing during the processing of Sanchuan ham.Results showed that the nitrite remained at a stable level of 0.15 mg/kg which was significantly lower than the national health standard safety level of 20 mg/kg.In addition,compared with fresh hams,the content of total free amino acids in ripe Sanchuan ham has grown 14 folds;sour and bitter were the main tastes of Sanchuan ham.Notably,the concentration of cadaverine was the highest of all biogenic amines during the entire fermentation period.At the bacterial phyla level,Firmicutes and Actinobacteria were the two main phyla,while at the genus level,Staphylococcus was a significant strain throughout the whole fermentation.Moreover,the dry stage has a great impact on the succession change of microbial community structure.Simultaneously,the change trends and composition of bacteria in the interior have slight discrepancies with those of the exterior of Sanchuan ham.展开更多
Contrastive linguistics belongs to a branch of linguistics.It studies two or more languages synchronically.However,lexicology is the study of lexical items of a language.An English sentence or a Chinese sentence forme...Contrastive linguistics belongs to a branch of linguistics.It studies two or more languages synchronically.However,lexicology is the study of lexical items of a language.An English sentence or a Chinese sentence formed based on words and clauses.Because of differences in Cultures,the lexical meanings between English and Chinese differ in many aspects,such as motivation of words and sense relationships.This paper is a brief review that just likes a book report,mainly based on the book Contrastive Linguistics,of lexico-semantic contrasts between English and Chinese,illustrated with several examples in both English and Chinese.展开更多
2.2.3. Simple and Complex Sentences There is no general answer to the question whether a writer should use simple/one-clause sentences or complex ones. But choice between those two structures should not be made withou...2.2.3. Simple and Complex Sentences There is no general answer to the question whether a writer should use simple/one-clause sentences or complex ones. But choice between those two structures should not be made without considerations. Generally speaking, if the aim of the writer is to provide the reader with a complex structure of ideas and a complex reading experience, then complex sentences are preferred. If the writer uses a succession of simple sentences, there will be no obvious indication of relationship between the ideas conveyed in each separate sentence. Nor will there be any indication of the relative importance of the sentences. Therefore, simple sen-展开更多
It is significant to connect contexts and approaches to English language teaching,and it is also necessary to realize the challenges faced by English language learners in particular contexts so that we can get a bette...It is significant to connect contexts and approaches to English language teaching,and it is also necessary to realize the challenges faced by English language learners in particular contexts so that we can get a better understanding of teaching based on our own contexts and approaches.This article is the discussion of approach and the challenges in EFL context.展开更多
Constructive nonlinear control design has undergone rapid and significant progress over the last three decades. In this paper, a review of recent results in this important field is presented with a focus on interdisci...Constructive nonlinear control design has undergone rapid and significant progress over the last three decades. In this paper, a review of recent results in this important field is presented with a focus on interdisciplinary topics at the interface of control,computing and communications. In particular, it is shown that the nonlinear small-gain theory provides a unified framework for solving problems of quantized feedback stabilization and event-triggered control for nonlinear systems. Some open questions in quantized and networked nonlinear control systems are discussed.展开更多
Controller area network(CAN) is a widely used fieldbus protocol in various industrial applications.To understand the network behavior under errors for the optimal design of networked control systems, the message respo...Controller area network(CAN) is a widely used fieldbus protocol in various industrial applications.To understand the network behavior under errors for the optimal design of networked control systems, the message response time of the CAN network needs to be analyzed. In this study, a novel delay time distribution analysis method for the response messages is proposed when considering errors. In this method the complex message queues are decomposed into typical message patterns and cases. First, a stochastic fault model is developed, and the probability factor is defined to calculate the error distribution. Then the message delay time distribution for the single slave node configuration is analyzed based on the error distribution. Next, based on the delay time distribution analysis of typical patterns and cases, an analysis framework of message delay time distribution for the master/slave configuration is developed. The testbed is constructed and case studies are conducted to demonstrate the proposed methodology under different network configurations. Experimental results show that the delay time distributions calculated by the proposed method agree well with the actual observations.展开更多
This paper addresses the problem of robust iterative learning control design for a class of uncertain multiple-input multipleoutput discrete linear systems with actuator faults. The stability theory for linear repetit...This paper addresses the problem of robust iterative learning control design for a class of uncertain multiple-input multipleoutput discrete linear systems with actuator faults. The stability theory for linear repetitive processes is used to develop formulas for gain matrices design, together with convergent conditions in terms of linear matrix inequalities. An extension to deal with model uncertainty of the polytopic or norm bounded form is also developed and an illustrative example is given.展开更多
A series of very successful Continuous Very Long Baseline Interferometry Campaigns(CONT) have been carried out at irregular intervals since 1994.One of the goals is to support high-resolution earth rotation studies.Th...A series of very successful Continuous Very Long Baseline Interferometry Campaigns(CONT) have been carried out at irregular intervals since 1994.One of the goals is to support high-resolution earth rotation studies.The most recent CONT08 campaign was conducted with a network of 11 observatories at an increased recording rate of 512 Mbit per second over a fortnightly time span,from which stronger diurnal variations of the Earth Rotation Parameters(ERP) have been detected.We compared the high-frequency ERP from VLBI and GPS observations during CONT02,CONT05 and CONT08 with the atmospheric angular momentum functions derived from the National Centers for Environmental Prediction/National Center for Atmospheric(NCEP/NCAR) during these periods.We attribute the detected diurnal discrepancies between the theoretical models and the CONT08 observations to atmospheric excitations.展开更多
基金funded by National Natural Science Foundation of China(31460445)Science and Technology Talents and Platform Program of Yunnan Province,No.202105AF150049Yunnan University Key Laboratory of Food Microbial Resources and Utilization(Yunjiaofa[2018]No.135)。
文摘Sanchuan ham is appreciated in Yunnan Province,China,for its characteristic flavor and taste,while the microbial community structure and biogenic amines content remain unclear during fermentation processes.In this study,we explored the physicochemical property,biogenic amines concentration and microbial diversity of external and internal Sanchuan ham by high-throughput sequencing during the processing of Sanchuan ham.Results showed that the nitrite remained at a stable level of 0.15 mg/kg which was significantly lower than the national health standard safety level of 20 mg/kg.In addition,compared with fresh hams,the content of total free amino acids in ripe Sanchuan ham has grown 14 folds;sour and bitter were the main tastes of Sanchuan ham.Notably,the concentration of cadaverine was the highest of all biogenic amines during the entire fermentation period.At the bacterial phyla level,Firmicutes and Actinobacteria were the two main phyla,while at the genus level,Staphylococcus was a significant strain throughout the whole fermentation.Moreover,the dry stage has a great impact on the succession change of microbial community structure.Simultaneously,the change trends and composition of bacteria in the interior have slight discrepancies with those of the exterior of Sanchuan ham.
文摘Contrastive linguistics belongs to a branch of linguistics.It studies two or more languages synchronically.However,lexicology is the study of lexical items of a language.An English sentence or a Chinese sentence formed based on words and clauses.Because of differences in Cultures,the lexical meanings between English and Chinese differ in many aspects,such as motivation of words and sense relationships.This paper is a brief review that just likes a book report,mainly based on the book Contrastive Linguistics,of lexico-semantic contrasts between English and Chinese,illustrated with several examples in both English and Chinese.
文摘2.2.3. Simple and Complex Sentences There is no general answer to the question whether a writer should use simple/one-clause sentences or complex ones. But choice between those two structures should not be made without considerations. Generally speaking, if the aim of the writer is to provide the reader with a complex structure of ideas and a complex reading experience, then complex sentences are preferred. If the writer uses a succession of simple sentences, there will be no obvious indication of relationship between the ideas conveyed in each separate sentence. Nor will there be any indication of the relative importance of the sentences. Therefore, simple sen-
文摘It is significant to connect contexts and approaches to English language teaching,and it is also necessary to realize the challenges faced by English language learners in particular contexts so that we can get a better understanding of teaching based on our own contexts and approaches.This article is the discussion of approach and the challenges in EFL context.
基金supported by National Natural Science Foundation of China(No.61374042)the Fundamental Research Funds for the Central Universities in China(No.N130108001)
文摘Constructive nonlinear control design has undergone rapid and significant progress over the last three decades. In this paper, a review of recent results in this important field is presented with a focus on interdisciplinary topics at the interface of control,computing and communications. In particular, it is shown that the nonlinear small-gain theory provides a unified framework for solving problems of quantized feedback stabilization and event-triggered control for nonlinear systems. Some open questions in quantized and networked nonlinear control systems are discussed.
基金the National Natural Science Foundation of China (Nos. 51475422 and 51521064).
文摘Controller area network(CAN) is a widely used fieldbus protocol in various industrial applications.To understand the network behavior under errors for the optimal design of networked control systems, the message response time of the CAN network needs to be analyzed. In this study, a novel delay time distribution analysis method for the response messages is proposed when considering errors. In this method the complex message queues are decomposed into typical message patterns and cases. First, a stochastic fault model is developed, and the probability factor is defined to calculate the error distribution. Then the message delay time distribution for the single slave node configuration is analyzed based on the error distribution. Next, based on the delay time distribution analysis of typical patterns and cases, an analysis framework of message delay time distribution for the master/slave configuration is developed. The testbed is constructed and case studies are conducted to demonstrate the proposed methodology under different network configurations. Experimental results show that the delay time distributions calculated by the proposed method agree well with the actual observations.
基金supported by National Natural Science Foundation of China(Nos.61273070 and 61203092)111 project(No.B12018)
文摘This paper addresses the problem of robust iterative learning control design for a class of uncertain multiple-input multipleoutput discrete linear systems with actuator faults. The stability theory for linear repetitive processes is used to develop formulas for gain matrices design, together with convergent conditions in terms of linear matrix inequalities. An extension to deal with model uncertainty of the polytopic or norm bounded form is also developed and an illustrative example is given.
基金supported by the National Natural Science Foundation of China (10973031)National High-Tech Research and Development Program of China (2008AA12A210)100 Talents Program of the Chinese Academy of Sciences
文摘A series of very successful Continuous Very Long Baseline Interferometry Campaigns(CONT) have been carried out at irregular intervals since 1994.One of the goals is to support high-resolution earth rotation studies.The most recent CONT08 campaign was conducted with a network of 11 observatories at an increased recording rate of 512 Mbit per second over a fortnightly time span,from which stronger diurnal variations of the Earth Rotation Parameters(ERP) have been detected.We compared the high-frequency ERP from VLBI and GPS observations during CONT02,CONT05 and CONT08 with the atmospheric angular momentum functions derived from the National Centers for Environmental Prediction/National Center for Atmospheric(NCEP/NCAR) during these periods.We attribute the detected diurnal discrepancies between the theoretical models and the CONT08 observations to atmospheric excitations.
