Baum-Welch algorithm most likely results in underflow in practice. In some literatures, such as 'Scaling' algorithm was introduced to solve the problem. In applications, however, some mistakes were found in th...Baum-Welch algorithm most likely results in underflow in practice. In some literatures, such as 'Scaling' algorithm was introduced to solve the problem. In applications, however, some mistakes were found in the equations presented in these literatures. The practical calculations show that the original algorithm often results in poor or even none convergence and rather higher error rate in speech recognition. The mistakes in these literatures and brings forward the correct equations are analysed. The speech recognition system using the revised algorithm can converge well and has lower error rate.展开更多
Provided an algorithm for the distribution search and proves the time complexity of the algorithm. This algorithm uses a mathematical formula to search n elements in the sequence of n elements in O(n)expected time,and...Provided an algorithm for the distribution search and proves the time complexity of the algorithm. This algorithm uses a mathematical formula to search n elements in the sequence of n elements in O(n)expected time,and experimental reesult proves that distribution search is superior to binary search.展开更多
The problems of installation and integration of complex suite of software for processing medical images. Based analysis of the situation is realized in an easier integration of an automated system using the latest inf...The problems of installation and integration of complex suite of software for processing medical images. Based analysis of the situation is realized in an easier integration of an automated system using the latest information technologies using the web - environment for analysis and segmentation of DICOM - images.展开更多
Because of the widely-used nonlinear loads, the problems of harmonics and low power factor in power systems are becoming more and more serious. In view of the above problems, a shunt three-phase active power filter （...Because of the widely-used nonlinear loads, the problems of harmonics and low power factor in power systems are becoming more and more serious. In view of the above problems, a shunt three-phase active power filter （SAPF） based on discrete sliding mode control to suppress the harmonics was designed and the power factor improved. First, built the mathematical model of SAPF. Then, controlled the switch through analyzing the harmonic current that was controlled signal using discrete sliding mode control. Through simulation using MATLAB, verified the validity of the algorithm. By the simulation waveforms, it can be found that after the load current containing a large number of harmonics passes the active power filter, the waveform of the power current approximately becomes a sine wave and the harmonics is significantly reduced. As a result, it plays a good role in purifying power systems. Moreover, from the waveforms of harmonic current and power current, it can be found that the algorithm has a faster tracking speed. The waveform can fect.展开更多
Liver injury in Stevens-Johnson syndrome(SJS)and toxic epidermal necrolysis(TEN)is a multifaceted disorder,lacking cohort homogeneity due to a variety of potential causes,including drugs,arsenic and other heavy metals...Liver injury in Stevens-Johnson syndrome(SJS)and toxic epidermal necrolysis(TEN)is a multifaceted disorder,lacking cohort homogeneity due to a variety of potential causes,including drugs,arsenic and other heavy metals,glyphosate,infections,and ultraviolet radiation.The goals of this review were(1)to analyze the role of diagnostic algorithms in assessing causality for potential culprits involved in the development of liver injury associated with immune-mediated SJS and TEN,which represent immune-based variant disorders within a continuous spectrum.Milder forms are classified as SJS or SJS/TEN overlap,while TEN is known as the most serious form;and(2)to interpret the findings that allow for the characterization of the different types of these disorders.The manuscript is based on an extensive literature search for single case reports,case cohorts,and review articles.Search terms included:Stevens-Johnson Syndrome,Toxic Epidermal Necrolysis,and specific diagnostic algorithms such as the Roussel Uclaf Causality Assessment Method(RUCAM)and the Algorithm of Drug Causality for Epidermal Necrolysis(ALDEN).For the purpose of basic feature description,the uniform term SJS/TEN is used in the current analysis.SJS/TEN presents with five different cohort types:SJS/TEN type(1),which refers to a cohort of SJS/TEN caused by drugs,as assessed by both ALDEN and RUCAM;type(2),representing SJS/TEN due to drugs and assessed by ALDEN only,but not by RUCAM;type(3),which includes a cohort of SJS/TEN caused by drugs,assessed by non-ALDEN and non-RUCAM tools;type(4),which focuses on a cohort of SJS/TEN caused by non-drug culprits,assessed by various tools;and type(5),which considers a cohort of SJS/TEN caused by unknown culprits.Using this new SJS/TEN typology will help better characterize individual features,personalize treatment,and clarify pathogenetic specifics for each of the five disease types.This new SJS/TEN typology provides clarity by replacing issues of inhomogeneity with cohort homogeneity.展开更多
文摘Baum-Welch algorithm most likely results in underflow in practice. In some literatures, such as 'Scaling' algorithm was introduced to solve the problem. In applications, however, some mistakes were found in the equations presented in these literatures. The practical calculations show that the original algorithm often results in poor or even none convergence and rather higher error rate in speech recognition. The mistakes in these literatures and brings forward the correct equations are analysed. The speech recognition system using the revised algorithm can converge well and has lower error rate.
文摘Provided an algorithm for the distribution search and proves the time complexity of the algorithm. This algorithm uses a mathematical formula to search n elements in the sequence of n elements in O(n)expected time,and experimental reesult proves that distribution search is superior to binary search.
文摘The problems of installation and integration of complex suite of software for processing medical images. Based analysis of the situation is realized in an easier integration of an automated system using the latest information technologies using the web - environment for analysis and segmentation of DICOM - images.
基金Supported by the National Natural Science Foundation of China （50375026, 50375028）
文摘Because of the widely-used nonlinear loads, the problems of harmonics and low power factor in power systems are becoming more and more serious. In view of the above problems, a shunt three-phase active power filter （SAPF） based on discrete sliding mode control to suppress the harmonics was designed and the power factor improved. First, built the mathematical model of SAPF. Then, controlled the switch through analyzing the harmonic current that was controlled signal using discrete sliding mode control. Through simulation using MATLAB, verified the validity of the algorithm. By the simulation waveforms, it can be found that after the load current containing a large number of harmonics passes the active power filter, the waveform of the power current approximately becomes a sine wave and the harmonics is significantly reduced. As a result, it plays a good role in purifying power systems. Moreover, from the waveforms of harmonic current and power current, it can be found that the algorithm has a faster tracking speed. The waveform can fect.
文摘Liver injury in Stevens-Johnson syndrome(SJS)and toxic epidermal necrolysis(TEN)is a multifaceted disorder,lacking cohort homogeneity due to a variety of potential causes,including drugs,arsenic and other heavy metals,glyphosate,infections,and ultraviolet radiation.The goals of this review were(1)to analyze the role of diagnostic algorithms in assessing causality for potential culprits involved in the development of liver injury associated with immune-mediated SJS and TEN,which represent immune-based variant disorders within a continuous spectrum.Milder forms are classified as SJS or SJS/TEN overlap,while TEN is known as the most serious form;and(2)to interpret the findings that allow for the characterization of the different types of these disorders.The manuscript is based on an extensive literature search for single case reports,case cohorts,and review articles.Search terms included:Stevens-Johnson Syndrome,Toxic Epidermal Necrolysis,and specific diagnostic algorithms such as the Roussel Uclaf Causality Assessment Method(RUCAM)and the Algorithm of Drug Causality for Epidermal Necrolysis(ALDEN).For the purpose of basic feature description,the uniform term SJS/TEN is used in the current analysis.SJS/TEN presents with five different cohort types:SJS/TEN type(1),which refers to a cohort of SJS/TEN caused by drugs,as assessed by both ALDEN and RUCAM;type(2),representing SJS/TEN due to drugs and assessed by ALDEN only,but not by RUCAM;type(3),which includes a cohort of SJS/TEN caused by drugs,assessed by non-ALDEN and non-RUCAM tools;type(4),which focuses on a cohort of SJS/TEN caused by non-drug culprits,assessed by various tools;and type(5),which considers a cohort of SJS/TEN caused by unknown culprits.Using this new SJS/TEN typology will help better characterize individual features,personalize treatment,and clarify pathogenetic specifics for each of the five disease types.This new SJS/TEN typology provides clarity by replacing issues of inhomogeneity with cohort homogeneity.
