PACEMAKER lead infections are rare.There are only about 0.4％-1.1％ of the patients who have been implanted permanent pacemakers suffering from serious infections which lead to endocarditis.1 Generally,removal of the ...PACEMAKER lead infections are rare.There are only about 0.4％-1.1％ of the patients who have been implanted permanent pacemakers suffering from serious infections which lead to endocarditis.1 Generally,removal of the infected pacemaker wire and lead,long-term anti-infection therapy,and implantation of a new pacemaker to another anatomic site are accepted approaches for these patients.展开更多
A test beam line for pulsed beam generation for 10 MeV central region model (CRM) of a compact cyclotron is under construction at China Institute of Atomic Energy (CIAE).A 70MHz continuous H^- beam with the energy of ...A test beam line for pulsed beam generation for 10 MeV central region model (CRM) of a compact cyclotron is under construction at China Institute of Atomic Energy (CIAE).A 70MHz continuous H^- beam with the energy of dosens of keV or a hundred keV will be pulsed to a pulse length of less than 10ns with the repetition rate of 1—8MHz.A 70.487MHz buncher will be used to compress the DC beam into the RF phase acceptance of±30°of the CRM cyclotron. The 2.2MHz sine waveform will be used for the chopper.A pulse with the repetition rate of 4.4MHz and pulse length less than 10ns is expected after CRM cyclotron.展开更多
In this paper, the H∞ control problem is investigated for a class of discrete-time switched linear systems with modal persistent dwell-time(MPDT) switching. The redundant channels are considered to use in the data tr...In this paper, the H∞ control problem is investigated for a class of discrete-time switched linear systems with modal persistent dwell-time(MPDT) switching. The redundant channels are considered to use in the data transmission to benefit the capability of overcoming the fragility of networks commonly configured by a single channel in the communication networks subject to random packet losses. In light of a new class of Lyapunov functions, the desired observer-based quasi-time-dependent controllers, which have less conservatism than the time-independent ones, are designed such that the resulting closed-loop system is exponentially mean-square stable with a guaranteed H_∞ disturbance attenuation performance. The MPDT can be minimized while ensuring the existence of such a class of observer-based controllers for a given period of persistence. An example of DC-DC boost converter is provided to verify the effectiveness of theoretical findings.展开更多
During the past decades,nonlinear optical（NLO）materials have attracted special interest because of their potential applications in photonic devices,such as optical switching,frequency conversion and electro-optic mo...During the past decades,nonlinear optical（NLO）materials have attracted special interest because of their potential applications in photonic devices,such as optical switching,frequency conversion and electro-optic modulators.Among the finding ways to obtain excellent NLO materials with both large NLO response and short response time,展开更多
文摘PACEMAKER lead infections are rare.There are only about 0.4％-1.1％ of the patients who have been implanted permanent pacemakers suffering from serious infections which lead to endocarditis.1 Generally,removal of the infected pacemaker wire and lead,long-term anti-infection therapy,and implantation of a new pacemaker to another anatomic site are accepted approaches for these patients.
文摘A test beam line for pulsed beam generation for 10 MeV central region model (CRM) of a compact cyclotron is under construction at China Institute of Atomic Energy (CIAE).A 70MHz continuous H^- beam with the energy of dosens of keV or a hundred keV will be pulsed to a pulse length of less than 10ns with the repetition rate of 1—8MHz.A 70.487MHz buncher will be used to compress the DC beam into the RF phase acceptance of±30°of the CRM cyclotron. The 2.2MHz sine waveform will be used for the chopper.A pulse with the repetition rate of 4.4MHz and pulse length less than 10ns is expected after CRM cyclotron.
基金supported by the National Natural Science Foundation of China(Grant No.61322301)the Natural Science Foundation of Heilongjiang(Grant Nos.F201417&JC2015015)+1 种基金the Fundamental Research Funds for the Central UniversitiesChina(Grant Nos.HIT.BRETIII.201211&HIT.BRETIV.201306)
文摘In this paper, the H∞ control problem is investigated for a class of discrete-time switched linear systems with modal persistent dwell-time(MPDT) switching. The redundant channels are considered to use in the data transmission to benefit the capability of overcoming the fragility of networks commonly configured by a single channel in the communication networks subject to random packet losses. In light of a new class of Lyapunov functions, the desired observer-based quasi-time-dependent controllers, which have less conservatism than the time-independent ones, are designed such that the resulting closed-loop system is exponentially mean-square stable with a guaranteed H_∞ disturbance attenuation performance. The MPDT can be minimized while ensuring the existence of such a class of observer-based controllers for a given period of persistence. An example of DC-DC boost converter is provided to verify the effectiveness of theoretical findings.
基金supported by the National Natural Science Foundation of China(Grant No.11474046)Program for New Century Excellent Talents in University(Grant No.NCET-13-0702)+3 种基金Fundamental Research Funds for the Central Universities(Grant Nos.DC201502080202,and DC201502080203)Program for Liaoning Excellent Talents in University(LNET)(Grant No.LR2015016)Science and Technique Foundation of Dalian(Grant Nos.2014J11JH134,and 2015J12JH201)Education Department of Liaoning Province of China.
文摘During the past decades,nonlinear optical（NLO）materials have attracted special interest because of their potential applications in photonic devices,such as optical switching,frequency conversion and electro-optic modulators.Among the finding ways to obtain excellent NLO materials with both large NLO response and short response time,
