Fuzzy-Inverse-Model-Based Networked Tracking Control Frameworks of Time-Varying Signals

Dear Editor,Tracking control in networked environment is a very challenging problem due to the contradiction of rapid response to the time-varying signal and the inevitable delay introduced by networks. This letter has proposed several fuzzy-inverse-model-based network tracking control frameworks which are helpful in handling the system with nonlinear dynamics and uncertainties.

Set Stabilization of Large-Scale Stochastic Boolean Networks:A Distributed Control Strategy

Dear Editor,This letter deals with the set stabilization of stochastic Boolean control networks(SBCNs)by the pinning control strategy,which is to realize the full control for systems by imposing control inputs on a fraction of agents.

Exponential Synchronization of Delayed Stochastic Complex Dynamical Networks via Hybrid Impulsive Control

Dear Editor,This letter addresses the synchronization problem of a class of delayed stochastic complex dynamical networks consisting of multiple drive and response nodes.The aim is to achieve mean square exponential synchronization for the drive-response nodes despite the simultaneous presence of time delays and stochastic noises in node dynamics.

Synchronization of Drive-Response Networks With Delays on Time Scales

Dear Editor,This letter deals with the synchronization in drive-response networks with discrete and distributed delays on time scales.Based on the theory of calculus on time scales,Lyapunov functional method and inequality technique,we obtain new sufficient conditions to ensure synchronization criteria which are dependent on boundedness of grainness but independent of the types of delays.Numerical simulations are given to illustrate the effectiveness of our new results.

Letters and Visits System Optimization and Implementation

The letters and visits system plays a vital role in government work, serving as a crucial tool for supervising law enforcement and administrative conduct, ensuring public officials’ integrity, and promoting governance by law. As Chinese citizens’ political awareness grows, the volume of letters and visits has increased steadily. This paper reviews the current state of letters and visits information construction, identifies challenges and problems in system integration, presents integration ideas for existing systems, and proposes an innovative approach to letters and visits system integration. This research aims to provide valuable insights and guidance for other units undertaking similar system integration efforts.

Wood Crack Detection Based on Data-Driven Semantic Segmentation Network

Dear Editor, This letter is concerned with wood crack detection which is important to guarantee the quality of wooden products. In the wood industry, the crack detection is one of the most challenging tasks in the wood defects detection, since the detection accuracy may be reduced due to the stains on the boards, the tiny cracks, and some cracks that are similar to the sound region. To overcome these challenges.

Differences between English and Chinese Sales Promotion Letters

This paper aims to figure out the differences in English and Chinese sales promotion letters by analyzing ten selected letters from business writing books and websites, which might provide more valuable information for businessmen in their sales promotion letter writing.

Relationship between Numbers and Letters

This paper proposes that there is a relation between numbers and letters. This relation may exist in all types of different languages. This research focuses on the reason of choosing some mathematical symbols like ＂ ＂ and ＂π＂ in Arabic, Latin, and English languages. Also, this paper presents some relations between months, weeks, and days in Arabic, English, and Latin languages.

Finite-Horizon l_(2)–l_(∞)State Estimation for Networked Systems Under Mixed Protocols

Dear Editor,This letter is concerned with the finite-horizon l_(2)–l_(∞)state estimation(SE)problem for a class of networked time-delay systems where the measurements are transmitted through two individual communication channels.

Sliding Mode Control for Recurrent Neural Networks With Time-Varying Delays and Impulsive Effects

Dear Editor,This letter studies the problem of sliding mode control(SMC)design for recurrent neural networks(RNNs)with impulsive disturbances and time-varying transmission delays.To this end,an appropriate integral sliding surface function and SMC law are adopted for use under impulsive disturbances and time-varying delays.

Finite-Time Synchronization of Complex Networks With Intermittent Couplings and Neutral-Type Delays

Dear Editor, This letter focuses on the finite-time synchronization(FTS) of neutral-type complex networks with intermittent couplings. Different from most of the existing references concerning neutral-type systems,a delay-independent dynamical event-triggering controller is considered, operating the same way as the intermittent coupling and excluding the Zeno behavior naturally.

RGCNU: Recurrent Graph Convolutional Network With Uncertainty Estimation for Remaining Useful Life Prediction

Dear Editor,This letter focuses on the problem of remaining useful life(RUL)prediction of equipment. Existing graph neural network(GCN)-based approaches merely provide the point estimation of RUL. However,the estimated RUL often varies widely due to the model parameters and the noise in data. It is important to know the uncertainty in predictions for reliable risk analysis and maintenance decision making.To map the relationship between noisy condition monitoring data and RUL with uncertainty.

Study on the Changes of FDA Finished Pharmaceuticals Warning Letters between 2011 and 2021

Objective To explore the trends in the distribution of countries to which FDA warning letters for Finished Pharmaceuticals have been issued over the past 10 years,and whether there are changes in the number of GMP violations,and to study their possible causes.Methods Public data on FDA warning letters and inspections were retrieved and analyzed using statistical methods for different classifications.Results and Conclusion Asia was the continent that received the most GMP warning letters in the last 10 years.More inspections were conducted in developed countries than that in developing countries,but they received a small number of warning letters.Quality control unit responsibilities were the most variable within all violation codes.The number of warning letters issued by Center for Drug Evaluation and Research(CDER)for Finished Pharmaceuticals increases with the number of inspections,and the enforcement of GMP by domestic drug manufacturers is better than that of overseas drug manufacturers.In addition,drug manufacturers in developed countries are better at GMP implementation than developing countries.GMP compliance in China has become better in recent years,but it still receives more inspections and warning letters.FDA inspections of Finished Pharmaceuticals become more stringent in the last 10 years,and many quality unit issues are affected by both personnel qualifications and personnel numbers.

Two Clever Lovers and Their Letters

A long time ago,a handsome young man and a beautiful girl fellin love with each other at the first sight. But neither of them knewwhether the other had his or her sweet—heart nor had they thecourage to express himself or herself face to face with each other.Ev-ery time they met,they both would look at each other,in silence,inshyness and in love.And they both were worried and sad.

A Novel Trajectory Tracking Control of AGV Based on Udwadia-Kalaba Approach

Dear Editor,This letter is about an automated guided vehicle(AGV)trajectory tracking control method based on Udwadia-Kalaba(U-K)approach.This method provides a novel,concise and explicit motion equation for constrained mechanical systems with holonomic and/or nonholonomic constraints as well as constraints that may be ideal or nonideal.In this letter.

Autonomous Recommendation of Fault Detection Algorithms for Spacecraft

Dear Editor, This letter deals with the problem of algorithm recommendation for online fault detection of spacecraft. By transforming the time series data into distributions and introducing a distribution-aware measure, a principal method is designed for quantifying the detectabilities of fault detection algorithms over special datasets.

Robust Distributed Model Predictive Control for Formation Tracking of Nonholonomic Vehicles

Dear Editor,This letter proposes a robust distributed model predictive control(MPC) strategy for formation tracking of a group of wheeled vehicles subject to constraints and disturbances. Formation control has attracted significant interest because of its applications in searching and exploration [1], [2].

Antiviral treatment standards for hepatitis B:An urgent need for expansion

The present letter to the editor is related to the review with the title“Past,present,and future of long-term treatment for hepatitis B virus.”Chronic hepatitis B(CHB)represents an important and pressing public health concern.Timely identification and effective antiviral therapy hold the potential to reduce liver-related mortality attributable to chronic infection with hepatitis B virus(HBV)substantially.However,the current global treatment rates for CHB remain conspicuously low,with the excessively stringent treatment criteria advocated by national CHB guidelines being a contributing factor to these low rates.Nevertheless,recent strides in comprehending this malady and the emergence of novel antiviral agents prompt the imperative re-evaluation of treatment standards to extend the sphere of potential beneficiaries.An impending need arises for a novel paradigm for the classification of patients with CHB,the expansion of antiviral treatment eligibility for HBV-infected individuals,and even the streamlining of the diagnostic process for CHB to amplify cost-effectiveness and augment survival prospects.

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