This job focuses on the stroke regulation of a class of high-precision metering pumps.A parametertuning method of robust non-fragile PID（proportional-integral-derivative）controllers is proposed with the assumption t...This job focuses on the stroke regulation of a class of high-precision metering pumps.A parametertuning method of robust non-fragile PID（proportional-integral-derivative）controllers is proposed with the assumption that a PID controller has additive gain perturbations.An H-infinite robust PID controller can be obtained by solving a linear matrix inequality.This approach can guarantee that the closed-loop control systems is asymptotically stable and the H-infinite norm of the transfer function from the disturbance to the output of a controlled system is less than a given constant to attenuate disturbances.The simulation case shows that the control performance of the proposed strategy is significantly better than the traditional PID approach in the situation with perturbations of controller parameters.展开更多
Objective To analyze the intellectual structure,hotspots and trends of traditional Chinese medicine(TCM)in immune regulation research.Methods The data were extracted from the Web of Science Core Collection(WoSCC)and t...Objective To analyze the intellectual structure,hotspots and trends of traditional Chinese medicine(TCM)in immune regulation research.Methods The data were extracted from the Web of Science Core Collection(WoSCC)and the China National Knowledge Infrastructure(CNKI)and verified by two experienced TCM researchers.The time of literature retrieval is up to 2020.CiteSpace 5.7.R1 and Microsoft Excel 2016 were used for the statistical analysis and bibliometric diagrams,including the co-occurrence network of authors,institutions,countries,keywords,references,dual-map overlays of journals and citation bursts,etc.Results A total of 12270 publications related to TCM in immune regulation were included.The annual number of publications has increased in this field.There was close cooperation of countries and institutions,while the distribution of scholars was scattered.China was the core of the cooperation network.The dual-map overlays analysis of journals showed that core and marginal fields had increased.The keywords and references analysis showed that network pharmacology,metabolism and cancer were the most high-frequency keywords with high-intensity bursts.Conclusion TCM in immune regulation has attracted wider attention,with multi-country,multi-field,multi-disciplinary and multi-level research developing toward informatization.Network pharmacology,metabolism and cancer may be the focus of future research in this field.展开更多
From the very beginning, auditing is pretty much a self-regulated follow in practice. But the plethora of recent corporate failures profession and has some ethical rules of thumb to and scandals where auditors＇ instr...From the very beginning, auditing is pretty much a self-regulated follow in practice. But the plethora of recent corporate failures profession and has some ethical rules of thumb to and scandals where auditors＇ instrumental role is evident in many instances raise question about the validity and suitability of ＂self-regulation＂ in auditing, especially in the 21st century where auditors need to perform auditing in ever complex risk management process. Moreover, to restore the market confidences within the auditing profession and to raise the overall audit quality, many countries are establishing some super regulatory bodies to oversee the functions of auditing and auditors. Based on the ＂documentary research methodology＂, the author examines whether ＂self-regulation＂ in auditing has completely failed in the 21 st century. The author reveals that ＂self-regulation＂ in auditing has not completely failed; rather, a joint approach is needed to raise the overall quality of auditing where there will be equilibrium between ＂self-regulation＂ and statutory directive.展开更多
Gravitational contributions to the running of gauge couplings are calculated by using different regularizationschemes.As the β function concerns counter-terms of dimension four, only quadratic divergences from the gr...Gravitational contributions to the running of gauge couplings are calculated by using different regularizationschemes.As the β function concerns counter-terms of dimension four, only quadratic divergences from the gravitationalcontributions need to be investigated.A consistent result is obtained by using a symmetry-preserving loop regularizationwith string-mode regulators which can appropriately treat the quadratic divergences and preserve non-abelian gaugesymmetry.The harmonic gauge condition for gravity is used in both diagrammatical and background field calculations,the resulting gravitational corrections to the β function are found to be nonzero, which is different from previous resultspresented in the existing literatures.展开更多
基金Supported by the National Natural Science Foundation of China（60604015） the Key Research Program of Education Department of Zhejiang Province（Z200803521）
文摘This job focuses on the stroke regulation of a class of high-precision metering pumps.A parametertuning method of robust non-fragile PID（proportional-integral-derivative）controllers is proposed with the assumption that a PID controller has additive gain perturbations.An H-infinite robust PID controller can be obtained by solving a linear matrix inequality.This approach can guarantee that the closed-loop control systems is asymptotically stable and the H-infinite norm of the transfer function from the disturbance to the output of a controlled system is less than a given constant to attenuate disturbances.The simulation case shows that the control performance of the proposed strategy is significantly better than the traditional PID approach in the situation with perturbations of controller parameters.
基金We thank for the funding support from the National Natural Science Foundation of China(No.81874492)Key Scientific Research Projects of Hunan Provincial Department of Education(No.18A219)the Domestic First-Class Discipline Construction Project of Chinese Medicine of Hunan University of Chinese Medicine.
文摘Objective To analyze the intellectual structure,hotspots and trends of traditional Chinese medicine(TCM)in immune regulation research.Methods The data were extracted from the Web of Science Core Collection(WoSCC)and the China National Knowledge Infrastructure(CNKI)and verified by two experienced TCM researchers.The time of literature retrieval is up to 2020.CiteSpace 5.7.R1 and Microsoft Excel 2016 were used for the statistical analysis and bibliometric diagrams,including the co-occurrence network of authors,institutions,countries,keywords,references,dual-map overlays of journals and citation bursts,etc.Results A total of 12270 publications related to TCM in immune regulation were included.The annual number of publications has increased in this field.There was close cooperation of countries and institutions,while the distribution of scholars was scattered.China was the core of the cooperation network.The dual-map overlays analysis of journals showed that core and marginal fields had increased.The keywords and references analysis showed that network pharmacology,metabolism and cancer were the most high-frequency keywords with high-intensity bursts.Conclusion TCM in immune regulation has attracted wider attention,with multi-country,multi-field,multi-disciplinary and multi-level research developing toward informatization.Network pharmacology,metabolism and cancer may be the focus of future research in this field.
文摘From the very beginning, auditing is pretty much a self-regulated follow in practice. But the plethora of recent corporate failures profession and has some ethical rules of thumb to and scandals where auditors＇ instrumental role is evident in many instances raise question about the validity and suitability of ＂self-regulation＂ in auditing, especially in the 21st century where auditors need to perform auditing in ever complex risk management process. Moreover, to restore the market confidences within the auditing profession and to raise the overall audit quality, many countries are establishing some super regulatory bodies to oversee the functions of auditing and auditors. Based on the ＂documentary research methodology＂, the author examines whether ＂self-regulation＂ in auditing has completely failed in the 21 st century. The author reveals that ＂self-regulation＂ in auditing has not completely failed; rather, a joint approach is needed to raise the overall quality of auditing where there will be equilibrium between ＂self-regulation＂ and statutory directive.
基金Supported by the National Natural Science Foundation of China under Grant Nos.10821504,10491306,10975170 the Project of Knowledge Innovation Program of Chinese Academy of Science
文摘Gravitational contributions to the running of gauge couplings are calculated by using different regularizationschemes.As the β function concerns counter-terms of dimension four, only quadratic divergences from the gravitationalcontributions need to be investigated.A consistent result is obtained by using a symmetry-preserving loop regularizationwith string-mode regulators which can appropriately treat the quadratic divergences and preserve non-abelian gaugesymmetry.The harmonic gauge condition for gravity is used in both diagrammatical and background field calculations,the resulting gravitational corrections to the β function are found to be nonzero, which is different from previous resultspresented in the existing literatures.
