synchronization

摘要： CASE A man in his sixties with dilated cardiomyopathy was admitted to our hospital for the replacement of his cardiac resynchronization therapy (CRT) device. Although his condition had been initially improved after CRT implantation and he had taken an optimized medication regimen and undergone regular device follow-up, echocardiography showed progressive dyspnea and edema with decreased left ventricular ejection fraction (LVEF). During the procedure,his CRT was disconnected and tested using an analyzer module 2290 of the Medtronic 2090 programmer (Medtronic Inc., USA), and a temporary pacemaker (Model 5318;Medtronic Inc., USA) and high pacing thresholds (>5 V/0.5ms) were noted for both ventricles (Figures 1 A and B).

摘要： In the real-time scheduling theory,schedulability and synchronization analyses are used to evaluate scheduling algorithms and real-time locking protocols,respectively,and the empirical synthesis experiment is one of the major methods to compare the performance of such analyses.However,since many sophisticated techniques have been adopted to improve the analytical accuracy,the implementation of such analyses and experiments is often time-consuming.This paper proposes a schedulability experiment toolkit for multiprocessor real-time systems(SET-MRTS),which provides a framework with infrastructures to implement the schedulability and synchronization analyses and the deployment of empirical synthesis experiments.Besides,with well-designed peripheral components for the input and output,experiments can be conducted easily and flexibly on SET-MRTS.This demonstration further proves the effectiveness of SET-MRTS in both functionality and availability.

摘要： Cardiac resynchronization therapy(CRT)is an evidence-based effective therapy of symptomatic heart failure with reduced ejection fraction refractory to optimal medical ther-apy and associated with intraventricular conduction disturbance,that results in a significant electrical ventricular dyssynchrony.However,the non-response rate to CRT is still 20%−40%.[1]The potential underlying causes of CRT nonresponse are:(1)suboptimal localization of the left ventricular(LV)electrode,far away from the latest activated LV region.

摘要： Cardiac resynchronization therapy(CRT)is an evidence-based effective therapy of symptomatic heart failure with reduced ejection fraction refractory to optimal medical treatment associated with intraventricular conduction disturbance,that results in electrical dyssynchrony and further deterioration of systolic ventricular function.However,the non-response rate to CRT is still 20%−40%,which can be decreased by better patient selection.The main determinant of CRT outcome is the presence or absence of significant ventricular dyssynchrony and the ability of the applied CRT technique to eliminate it.The current guidelines recommend the determination of QRS morphology and QRS duration and the measurement of left ventricular ejection fraction for patient selection for CRT.However,QRS morphology and QRS duration are not perfect indicators of electrical dyssynchrony,which is the cause of the not negligible non-response rate to CRT and the missed CRT implantation in a significant number of patients who have the appropriate substrate for CRT.Using imaging modalities,many ventricular dyssynchrony criteria were devised for the detection of mechanical dyssynchrony,but their utility in patient selection for CRT is not yet proven,therefore their use is not recommended for this purpose.Moreover,CRT can eliminate only mechanical dyssynchrony due to underlying electrical dyssynchrony,for this reason ECG has a greater role in the detection of ventricular dyssynchrony than imaging modalities.To improve assessment of electrical dyssynchrony,we devised two novel ECG dyssynchrony criteria,which can estimate interventricular and left ventricular intraventricular dyssynchrony in order to improve patient selection for CRT.Here we discuss the results achieved by the application of these new ECG dyssynchrony criteria,which proved to be useful in predicting the CRT response in patients with nonspecific intraventricular conduction disturbance pattern(the second greatest group of CRT candidates),and the significance of other new ECG dyssynchrony criteria in the potential improvement of CRT outcome.

摘要： Cardiac resynchronization therapy(CRT)has emerged as an important intervention for patients with heart failure(HF)with reduced ejection fraction and delayed ventricular activation.In these patients,CRT has demonstrated to improve quality of life,promote reverse left ventricular(LV)remodeling,reduce HF hospitalizations,and extend survival.However,despite advancements in our understanding of CRT,a significant number of patients do not respond to this therapy.Several invasive and non-invasive parameters have been assessed to predict response to CRT,but the electrocardiogram(ECG)has remained as the prevailing screening method albeit with limitations.Ideally,an accurate,simple,and reproducible ECG marker or set of markers would dramatically overcome the current limitations.We describe the clinical utility of an old ECG parameter that can estimate ventricular activation delay:the onset to intrinsicoid deflection(ID).Based on the concept of direct measurement of ventricular activation time(intrinsic deflection onset),time to ID onset measures on the surface ECG the time that the electrical activation time takes to reach the area subtended by the corresponding surface ECG lead.Based on this principle,the time to ID on the lateral leads can estimate the delay activation to the lateral LV wall and can be used as a predictor for CRT response,particularly in patients with non-specific intraventricular conduction delay or in patients with left bundle branch block and QRS<150 ms.The aim of this review is to present the current evidence and potential use of this ECG parameter to estimate LV activation and predict CRT response.

摘要： In this paper, fixed-time (FXT) synchronization issue of a type of neural networks (NNs) with stochastic perturbations is considered. First, we obtained some novel sufficient criteria to guarantee the FXT synchronization of considered networks via introducing two types of controllers and employing some inequality techniques. Lastly, our theoretical results are verified via giving two numerical examples with their Matlab simulations.

摘要： Cardiac resynchronization therapy(CRT)is a good treatment for heart failure accompanied by ventricular conduction abnormalities.Current ECG criteria in international guidelines seem to be suboptimal to select heart failure patients for CRT.The criteria QRS duration and left bundle branch block(LBBB)QRS morphology insufficiently detect left ventricular activation delay,which is required for benefit from CRT.Additionally,there are various definitions for LBBB,in which each one has a different association with CRT benefit and is prone to subjective interpretation.Recent studies have shown that the objectively measured vectorcardiographic QRS area identifies left ventricular activation delay with higher accuracy than any of the current ECG criteria.Indeed,various studies have consistently shown that a high QRS area prior to CRT predicts both echocardiographic and clinical improvement after CRT.The beneficial relation of QRS area with CRT-outcome was largely independent from QRS morphology,QRS duration,and patient characteristics known to affect CRT-outcome including ischemic etiology and sex.On top of QRS area prior to CRT,the reduction in QRS area after CRT further improves benefit.QRS area is easily obtainable from a standard 12-lead ECG though it currently requires off-line analysis.Clinical applicability will be significantly improved when QRS area is automatically determined by ECG equipment.

摘要： This paper provides a perception that all things are connected. Starting with the perception of Metaphysics and how matter exists out of total void, complementary matter, or dark matter, the incompleteness of Einstein relativistic theory. Multi spacetime universes and the jump drive for jumping within and between spacetime universes. Warp drive for space travel. DNA as sequence of momentary frequencies and how it related to Ezekiel’s dry bones prophecy. The outcome of neural patterns as cords of consciousness, consciousness as the collection of all cords of consciousness and the lack of uniqueness of individual consciousness. Finally, all things are cords of consciousness.

摘要： The performance of two widely used chaos synchronization approaches, active control and backstepping control, is investigated in this study. These two methods are projected to synchronize two chaotic systems (Master/Drive of Rucklidge Systems) that are identical but have different initial conditions. The paper’s significant feature is that based on error dynamics, controllers are designed using the appropriate variable and the time synchronization between master Rucklidge and drive Rucklidge systems using both methods. The control function of the active control method is designed on the proper selection of matrices. The chaotic behavior is controlled using a recursive backstepping design based on the Lyapunov stability theory with a validated Lyapunov function. The effectiveness of the controller in eradicating the chaotic behavior from the state trajectories is also revealed using numerical simulations with Matlab. The backstepping method is superior to the active control method for synchronization of the measured pair of systems, as it takes less time to synchronize while exhausting the first one than the second one with great performance, according to numerical simulation and graphical outcomes.

摘要： This study introduces a new continuous time differential system,which contains ten terms with three quadratic nonlinearities.The new system can demonstrate hyperchaotic,chaotic,quasi-periodic,and periodic behaviors for its different parameter values.All theoretical and numerical analysis are investigated to confirm the complex hyperchaotic behavior of our proposed model using many tools that include Kaplan-Yorke dimension,equilibrium points stability,bifurcation diagrams,and Lyapunov exponents.By means of Multisim software,the authors also designed an electronic circuit to confirm our proposed systems’physical feasibility.MATLAB and Multisim simulation results excellently agree with each other,which validate the feasibility of our new ten terms hyperchaotic system and make it very desirable to use in different domains especially in chaotic-based communication.Furthermore,by employing the drive response synchronisation,we developed a secure communication strategy for the proposed system.Findings from the proposed scheme show that the proposed approach was successful in completing the encryption and decryption procedure.

摘要： With the high speed development of mobile communication technical, mobile database have gotten extensive application in more and more region, many user must touch to mobile database. Then, how about the application status of the mobile database, which dimension must be noticed where the user choose mobile database? Through the introduce about mobile database product AND the explanation about mobile database application function, believe user be able to chosen the best mobile database for himself from multitude mobile database product.

摘要： With the high speed development of mobile communication technical, mobile database have gotten extensive application in more and more region, many user must touch to mobile database. Then, how about the application status of the mobile database, which dimension must be noticed where the user choose mobile database? Through the introduce about mobile database product AND the explanation about mobile database application function, believe user be able to chosen the best mobile database for himself from multitude mobile database product.

摘要： With the high speed development of mobile communication technical, mobile database have gotten extensive application in more and more region, many user must touch to mobile database. Then, how about the application status of the mobile database, which dimension must be noticed where the user choose mobile database? Through the introduce about mobile database product AND the explanation about mobile database application function, believe user be able to chosen the best mobile database for himself from multitude mobile database product.

摘要： 一种基于JVM Markword的Synchronized锁降级方法，包括：获取对象的对象头信息，并根据所述对象的对象头信息在JVM中构建所述对象的对象头数据结构；响应于所述对象头数据结构构建完成，根据所述对象头数据结构建立所述对象的锁记录信息表；根据线程对所述对象的加锁式访问次数更新所述对象的锁记录信息表中的所述线程的加锁次数；响应于所述对象的对象锁为重量锁且所述对象的锁记录信息表中的线程加锁次数达到预定次数，将所述对象的对象锁降级为轻量锁。通过本发明提出的方法可有效解决现有技术无法对对象的锁进行降级的问题，提高Java程序的运行效率，并且不依赖第三方库的兼容性，高效，便利。