Xu Nan,a former intern at a tourism company in Shanghai,is rethinking her career plan.The graduating business management student had been interning with a tourism company and expecting to be hired there before the nov...Xu Nan,a former intern at a tourism company in Shanghai,is rethinking her career plan.The graduating business management student had been interning with a tourism company and expecting to be hired there before the novel coronavirus epidemic struck.展开更多
Artificial synapses utilizing spike signals are essential elements of new generation brain-inspired computers.In this paper,we realize light-stimulated adaptive artificial synapse based on nanocrystalline zinc oxide f...Artificial synapses utilizing spike signals are essential elements of new generation brain-inspired computers.In this paper,we realize light-stimulated adaptive artificial synapse based on nanocrystalline zinc oxide film.The artificial synapse photoconductivity shows spike-type signal response,long and short-term memory(LTM and STM),STM-to-LTM transition and paired-pulse facilitation.It is also retaining the memory of previous exposures and demonstrates spike-frequency adaptation properties.A way to implement neurons with synaptic depression,tonic excitation,and delayed accelerating types of response under the influence of repetitive light signals is discussed.The developed artificial synapse is able to become a key element of neuromorphic chips and neuromorphic sensorics systems.展开更多
Objective To devise the safety and validity of clinical application of esophagus radiographic locating method of transseptal puncture. Methods Four hundreds and eighty-six patients who were undergone transseptal punct...Objective To devise the safety and validity of clinical application of esophagus radiographic locating method of transseptal puncture. Methods Four hundreds and eighty-six patients who were undergone transseptal puncture were randomized into two groups. Esophagus radiographic locating method of tansseptal puncture was applied in the study group(n=243) and modified-Ross locating method was used in the control group(n=243). After successful location, transseptal puncture was made. Then observe the success rate and complication incidences of the 2 groups. Results Left atria impression in the study group was clearly seen. 120 cases in control group could not shown clearly the left atria silhouette. The success rate of locating transseptal puncture in the study group and control group were 100% and 50.6 % respectively(P【0.001). The success rate of transeptal puncture in the study group and control group was 99.6% and 45.7% respectively (P【0.001). There were no puncture complication in study group and pericardial tamponade occurred in 1 case in control group. Conclusion The esophagus radiographic locating method of transeptal puncture is accurate, safe and simple to perform. According to the radiographic result, to perform thetranseptal puncture can achieve high success rate with few complications.展开更多
Background: Ventricular assist devices are now used as a bridge to recovery/decision/transplant or as destination therapy in end-stage heart failure. Continued improvements in technology and pump design have made impl...Background: Ventricular assist devices are now used as a bridge to recovery/decision/transplant or as destination therapy in end-stage heart failure. Continued improvements in technology and pump design have made implantation an easier process with reduced operative risks and pump-related adverse events. Considering the beneficial effects of these devices in the clinical setting, it seemed logical to address the long-term effect of the continuous flow pumps on diastolic dysfunction. Methods: This study addresses the effect of HeartMate IITM(HMII) support for 284+/-97 days on echocardiographic parameters of diastolic function. Data from fifteen patients was retrospectively studied status post left ventricular assist device (LVAD) implantation. The data at approximately 1-year post implantation was compared with that obtained prior to implantation. Statistical analyses were performed using the Microsoft Excel Program/MSExcel Stats. Echocardiographic measurements were carried out in accordance with the American Society of Echocardiography guidelines. Results: Of all the echocardiographic parameters assessed only E/Ea and calculated left atrial pressure (LAP) showed a statistically significant decrease. Two parameters that showed a trend towards significance are Ea (septal) and global functional index (p = 0.05). Conclusions: Continuous Flow LVAD support appears to improve diastolic dysfunction. This study has limitations in that we used a single type of continuous flow device (HeartMate IITM) and was conducted as a retrospective analysis. Further studies with larger populations and longer support are required to validate this finding.展开更多
Epidemic of cotton leaf curl virus disease(CLCD)was the compelling factor to devise newstrategies in cotton breeding programs ofPakistan.The evaluation of cotton genotypesagainst the CLCD resistance is difficult,expen...Epidemic of cotton leaf curl virus disease(CLCD)was the compelling factor to devise newstrategies in cotton breeding programs ofPakistan.The evaluation of cotton genotypesagainst the CLCD resistance is difficult,expensive and time consuming in field andespecially in greenhouse due to unevendistribution of the disease.A展开更多
This paper describes a new method to generate discrete signals with arbitrary power spectral density (PSD) and first order probability density function (PDF) without any limitation on PDFs and PSDs. The first approxim...This paper describes a new method to generate discrete signals with arbitrary power spectral density (PSD) and first order probability density function (PDF) without any limitation on PDFs and PSDs. The first approximation has been achieved by using a nonlinear transform function. At the second stage the desired PDF was approximated by a number of symmetric PDFs with defined variance. Each one provides a part of energy from total signal with different ratios of remained desired PSD. These symmetric PDFs defined by sinusoidal components with random amplitude, frequency and phase variables. Both analytic results and examples are included. The proposed scheme has been proved to be useful in simulations involving non-Gaussian processes with specific PSDs and PDFs.展开更多
A general approach to behavior genetics is to use a chemical mutagen, ethyl methanesulphonate (EMS), for mutagenesising point mutations, to devise a tester for screening a behavior mutant, to map the mutant sites in c...A general approach to behavior genetics is to use a chemical mutagen, ethyl methanesulphonate (EMS), for mutagenesising point mutations, to devise a tester for screening a behavior mutant, to map the mutant sites in chromosomes and then to ascertain where the defective neuronal circuit (including sensory receptors,展开更多
In China’s current educational fiscal decision making,problems are as follows:no law to trust or not abiding by available laws,absence of equity and efficiency,as well as the standardization of decision-making proced...In China’s current educational fiscal decision making,problems are as follows:no law to trust or not abiding by available laws,absence of equity and efficiency,as well as the standardization of decision-making procedures.It is necessary to set up effective fiscal decision-making mechanism in education and rationally devise reliable paths.展开更多
文摘Xu Nan,a former intern at a tourism company in Shanghai,is rethinking her career plan.The graduating business management student had been interning with a tourism company and expecting to be hired there before the novel coronavirus epidemic struck.
基金supported by the Ministry of Science and Higher Education of the Russian Federation (Grant№075-15-2020-801)by Non-commercial Foundation for support of Science and Education 《INTELLECT》.
文摘Artificial synapses utilizing spike signals are essential elements of new generation brain-inspired computers.In this paper,we realize light-stimulated adaptive artificial synapse based on nanocrystalline zinc oxide film.The artificial synapse photoconductivity shows spike-type signal response,long and short-term memory(LTM and STM),STM-to-LTM transition and paired-pulse facilitation.It is also retaining the memory of previous exposures and demonstrates spike-frequency adaptation properties.A way to implement neurons with synaptic depression,tonic excitation,and delayed accelerating types of response under the influence of repetitive light signals is discussed.The developed artificial synapse is able to become a key element of neuromorphic chips and neuromorphic sensorics systems.
文摘Objective To devise the safety and validity of clinical application of esophagus radiographic locating method of transseptal puncture. Methods Four hundreds and eighty-six patients who were undergone transseptal puncture were randomized into two groups. Esophagus radiographic locating method of tansseptal puncture was applied in the study group(n=243) and modified-Ross locating method was used in the control group(n=243). After successful location, transseptal puncture was made. Then observe the success rate and complication incidences of the 2 groups. Results Left atria impression in the study group was clearly seen. 120 cases in control group could not shown clearly the left atria silhouette. The success rate of locating transseptal puncture in the study group and control group were 100% and 50.6 % respectively(P【0.001). The success rate of transeptal puncture in the study group and control group was 99.6% and 45.7% respectively (P【0.001). There were no puncture complication in study group and pericardial tamponade occurred in 1 case in control group. Conclusion The esophagus radiographic locating method of transeptal puncture is accurate, safe and simple to perform. According to the radiographic result, to perform thetranseptal puncture can achieve high success rate with few complications.
文摘Background: Ventricular assist devices are now used as a bridge to recovery/decision/transplant or as destination therapy in end-stage heart failure. Continued improvements in technology and pump design have made implantation an easier process with reduced operative risks and pump-related adverse events. Considering the beneficial effects of these devices in the clinical setting, it seemed logical to address the long-term effect of the continuous flow pumps on diastolic dysfunction. Methods: This study addresses the effect of HeartMate IITM(HMII) support for 284+/-97 days on echocardiographic parameters of diastolic function. Data from fifteen patients was retrospectively studied status post left ventricular assist device (LVAD) implantation. The data at approximately 1-year post implantation was compared with that obtained prior to implantation. Statistical analyses were performed using the Microsoft Excel Program/MSExcel Stats. Echocardiographic measurements were carried out in accordance with the American Society of Echocardiography guidelines. Results: Of all the echocardiographic parameters assessed only E/Ea and calculated left atrial pressure (LAP) showed a statistically significant decrease. Two parameters that showed a trend towards significance are Ea (septal) and global functional index (p = 0.05). Conclusions: Continuous Flow LVAD support appears to improve diastolic dysfunction. This study has limitations in that we used a single type of continuous flow device (HeartMate IITM) and was conducted as a retrospective analysis. Further studies with larger populations and longer support are required to validate this finding.
文摘Epidemic of cotton leaf curl virus disease(CLCD)was the compelling factor to devise newstrategies in cotton breeding programs ofPakistan.The evaluation of cotton genotypesagainst the CLCD resistance is difficult,expensive and time consuming in field andespecially in greenhouse due to unevendistribution of the disease.A
文摘This paper describes a new method to generate discrete signals with arbitrary power spectral density (PSD) and first order probability density function (PDF) without any limitation on PDFs and PSDs. The first approximation has been achieved by using a nonlinear transform function. At the second stage the desired PDF was approximated by a number of symmetric PDFs with defined variance. Each one provides a part of energy from total signal with different ratios of remained desired PSD. These symmetric PDFs defined by sinusoidal components with random amplitude, frequency and phase variables. Both analytic results and examples are included. The proposed scheme has been proved to be useful in simulations involving non-Gaussian processes with specific PSDs and PDFs.
文摘A general approach to behavior genetics is to use a chemical mutagen, ethyl methanesulphonate (EMS), for mutagenesising point mutations, to devise a tester for screening a behavior mutant, to map the mutant sites in chromosomes and then to ascertain where the defective neuronal circuit (including sensory receptors,
文摘In China’s current educational fiscal decision making,problems are as follows:no law to trust or not abiding by available laws,absence of equity and efficiency,as well as the standardization of decision-making procedures.It is necessary to set up effective fiscal decision-making mechanism in education and rationally devise reliable paths.
