电视台安全播出检测预警系统的设计和实施

本文对影响播出安全的主要因素分析后,结合播出系统现状,构建安全播出播前检测预警系统,面向播出业务流程,对各关键元素、环节进行监控报警,实现播出系统播前检测(包括文件级及AV级内容检测)、全频道预播系统、字幕监测系统(关键字过滤)三大功能,以期提高播出系统的安全度,实现安全播出。

西藏广播电视台高标清同播播出系统设计

西藏广播电视台电视高清节目播出频道系统升级改造项目于2022年10月上线试播。本项目在原址上新建1套覆盖该台2套上星和1套地面电视频道的全高清数字硬盘播出系统,以及1套144×144规模的全高清数字总控系统,包括配套的整备系统、网络安全系统、播出安全管控及监测系统、节目编码传输系统及监测系统等。通过高/标清兼容的方式实现高/标清同播。系统还采用先进的ALL-IN-ONE视频服务器作为信号链路的第三备份,同时增加自动化预播功能和一致性比对等技术,确保播出系统的安全可靠。本文重点介绍该项目建设的背景、高标清同播系统的整体框架以及系统的主要配置设计。

南京广播电视集团硬盘播出系统建设

本文叙述了南京广播电视集团电视播出系统建设,包括新建2个高清和搬迁2个标清频道、改造6+1个标清频道播出路由、新建上载系统、新建系统监控、完善应急播出系统等,实现了播出通道2+1+1路互为备份、主播出+应急播出独立运行的系统级备份体系;采用全硬盘播出、全网络化、全智能化的基本设计理念,适应未来全台媒资系统、新媒体发布的需求,技术先进、科学合理、安全可靠、功能完备、方便使用、经济性好,新建系统能充分满足10+1套电视节目安全、优质播出的需要。

辽宁广播电视台编播流程的设计与实施

本文介绍了辽宁广播电视台新型播控系统建设过程中,结合本台编播工作的特点,设计新的编播流程的思路。并对具体备播流程进行了详细描述。

南京广电集团新播控软件特色功能浅析

结合目前电视播控系统网络化、自动化、智能化的发展趋势,借南京广电集团电视播出系统升级改造的契机,在保持现有节目生产流程和工作模式的基础上,将播控软件的高安全性、高可靠性、多功能、可升级的设计原则贯穿始终。该项目实施后,确保了节目安全优质播出、减轻了人员劳动强度、减少了人为操作事故。阐述了播控软件系统架构和新增特色功能,为播控软件的个性化定制开发提供有益的借鉴。

辽宁广播电视台＂电视剧＂类节目的生产和播出

本文筒述了辽宁，“播电视台“电视剧”类节目的生产和播出流程。

The study of acoustic emission (AE) forecasting coal and rock disaster technique

Introduced the coal and rock AE propagation rule,wave guide fixing technics onAE sensors,and AE forecasting coal and rock disaster on the scene and so on,The coaland rock AE propagation rule that follows the exponent attenuation function on different AEfrequencies,different quality factors and different propagation distances were analyzedand deduced by theory,numerical simulation,and by actual experiment.Consequently,itwas deduced that the coal and rock AE propagation rule follows the exponent attenuationfunction.Based on the correlative theory of wave dynamics and AE sensor,the AE waveguide propagation mechanical model on the sensor fixing manner is found,and the relationsof displacement and speed and acceleration between the AE signal source and theAE signal receiving terminal are presented.The effect of the AE sensor fixing manners oncoal and rock surfaces,coal and rock bottoms and wave guides were studied by actualexperiment.For the results,the effect of the AE sensor fixing manner on wave guides isbetter than on coal and rock surfaces,and was equivalent to the fixing manner on coal androck bottoms.Based on the above study results,actual coal and rock dynamistic disasterswere successfully forecasted.

Social Network Information Propagation Model Based on Individual Behavior

In this paper, we discuss building an information dissemination model based on individual behavior. We analyze the individual behavior related to information dissemination and the factors that affect the sharing behavior of individuals, and we define and quantify these factors. We consider these factors as characteristic attributes and use a Bayesian classifier to classify individuals. Considering the forwarding delay characteristics of information dissemination, we present a random time generation method that simulates the delay of information dissemination. Given time and other constraints, a user might not look at all the information that his/her friends published. Therefore, this paper proposes an algorithm to predict information visibility, i.e., it estimates the probability that an individual will see the information. Based on the classification of individual behavior and combined with our random time generation and information visibility prediction method, we propose an information dissemination model based on individual behavior. The model can be used to predict the scale and speed of information propagation. We use data sets from Sina Weibo to validate and analyze the prediction methods of the individual behavior and information dissemination model based on individual behavior. A previously proposedinformation dissemination model provides the foundation for a subsequent study on the evolution of the network and social network analysis. Predicting the scale and speed of information dissemination can also be used for public opinion monitoring.

Storm surge disaster evaluation model based on an artificial neural network

Back propagation is employed to forecast the current of a storm with various characteristics of storm surge; the technique is thus important in disaster forecasting. One of the most fuzzy types of information in the prediction of geological calamity is handled employing the information diffusion method. First, a single-step prediction model and neural network prediction model are employed to collect influential information used to predict the extreme tide level. Second, information is obtained using the information diffusion method, which improves the precision of risk recognition when there is insufficient information. Experiments demonstrate that the method proposed in this paper is simple and effective and provides better forecast results than other methods. Future work will focus on a more precise forecast model.

Nearest Object Priority Based Integrated Rough Surface Scattering Algorithm for 3D Indoor Propagation Prediction

Since rough surface scattering has a great impact on the accuracy of the propagation prediction algorithm,an integrated algorithm for indoor propagation prediction including rough surface scattering is proposed here.This algorithm is composed of a three dimensional(3D) ray tracing algorithm based on binary space partitioning(BSP) and a diffuse scattering algorithm based on Oren-Nayar's theory.Lack of accuracy and prohibitive time consumption are the main drawbacks of the existing ray tracing based propagation prediction models.To defy these shortcomings,the balanced BSP tree is used in the proposed algorithm to accelerate the ray tracing,while the nearest object priority technique(NOP) and in contact surface(ICS) is used to eliminate the repeated rayobject intersection tests.Therefore,the final criteria of this study are the time consumption as well as accuracy by predicting the field strength and the number of received signals.Using the proposed approaches,our algorithm becomes faster and more accurate than the existing algorithms.A detailed comparative study with existing algorithms shows that the proposed algorithm has at most 37.83%higher accuracy and 34.44%lower time consumption.Moreover,effects of NOP and ICS techniques and scattering factor on time and ray prediction accuracy are also presented.

Effects of pre-sowing treatments on seed germination of Melia azedarach

A germination experiment of pre-treated seeds of Melia azedarach was conducted in the nursery of Forestry and Wood Technology Discipline,Khulna University,Bangladesh.Matured seeds of Melia azedarach were collected from healthy trees of National Botanical Garden,Bangladesh and were treated with five pre-sowing treatments（control,immersion in cold water,immersion in hot water,scarification with sand paper,and immersion in concentrated H2SO4） on seed germination.Results revealed that the germination rates of pre-sowing treated seeds were significantly increased compared to those in control,except for cold water treatment.The highest germination success（80%） was found in scarification with sand paper,followed by 74% and 69% in immersion in H2SO4 and hot water treatment,respectively.Germination started on 8-11 days and completed on 20-21 days of the germination period in all cases.Analysis of variance showed the significance difference in germination success among the treatments but no significance difference in germination period among the treatment.Hot water treatment may be recommended on seed germination of the species in rural Bangladesh.

Science Letters:Peak-power reduction by the lattice-reduction-aided closest point search for MIMO broadcast channels

In this letter, we present a modified vector-perturbation precoding scheme for the multiple-input multiple-output broadcast channel, where a perturbation vector is chosen to take into account both the instantaneous power and the instantaneous peak power of the transmitted signal. This perturbation vector is obtained by using the closest point search, with the aid of the lattice-reduction algorithm. Simulation results show that the proposed scheme yields a tradeoff among power efficiency, peak-to-average power ratio reduction, and complexity.

Factors affecting the dynamic response of pre-stressed anchors after transient excitation

The wide application of pre-stressed bolting technology in coal mine tunnels has made the nondestructive stress wave reflection method of determining bolting quality an important one. The effect of the support plate on the dynamic response of the pre-stressed anchor is of particular interest. A theoretical analysis and numerical simulations are used to identify the factors affecting the contact stress between the support plate and the rock wall. A formula allowing the calculation of contact stress is presented. Stress wave propagation through the nut, support plate, and rock wall are predicted. The dynamic response signals were measured in the field using prestressed anchors pre-tightened to different torques. The effects from the support plate on the dynamic response were recorded and the results compared to the predictions of pre-stressed anchor. This work provides a theoretical reference for the signal processing of dynamic reflected wave signals in anchor bolts.

Analysis on the Trends of HIV/AIDS Epidemic in Shenzhen

Objective:To make a summary of the trends of HIV/AIDS epidemic and route of transmission in Shenzhen from 1992 to 2000 to provide scientific evidence for the policy-maker to formulate strategies of HIV/AIDS prevention and control in Shenzhen.Method:To analyze HIV/AIDS surveillance data in Shenzhen from 1992 to 2000 by software Epi-Info. Results: One hundred and two HIV positive cases including 18 AIDS cases (three cases deceased) were identified in Shenzhen from 1992 to 2000. Among the 102 cases, those infected via sex were 46.0%, intravenous drug use 42.9%.Blood donation 7.8%, blood transfusion recipient 3.9%, and indeterminate 2%. Conclusion: In Shenzhen, HIV/AIDS infection is spreading and increasing rapidly. Effective prevention measures must be taken to reduce the HIV prevalence as soon as possible.

Numerical Simulation of Water Wave Propagation and Transformation

A numerical approach was performed to predict the propagation and transformation of nonlinear water waves. A numerical wave flume was developed based on the non-periodic high-order spectral (HOS) method. The flume was applied to analyze the effect of wave steepness and wavelength on the propagation of nonlinear waves. The results show that for waves of low steepness, the wave profile and the wave energy spectrum are stable, and that the propagation can be predicted by the linear wave theory. For waves of moderate steepness and steep waves, the effects associated with the interactions between waves in a wave group become significant and a train of initially sinusoidal waves may drastically change its form within a short distance from its original position.

Technique for Controlling Spread of Limnotic Oncomelania

Schistosomiasis is a parasitic disease mostly found in areas along the Changjiang River of China. The disease is spread solely through an intermediary named oncomelania, so its spread of schistosomiasis can be controlled by properly designing water intakes which prevent oncomelania from entering farming land or residential areas. This paper reports a successful design process and a new oncomelania free intake device. The design of the new intake is based on a sound research program in which extensive experimental studies were carried out to gain knowledge of oncomelania eco hydraulic behavior and detailed flow field information through CFD simulation.

Multiuser Pre-Coding Aided Quadrature Spatial Modulation for Large-Scale MIMO Channels

Pre-coding aided quadrature spatial modulation(PQSM) is a promising multiple input multiple output(MIMO) transmission technology. The multiuser(MU) detection in PQSM system is investigated in this paper. Based on the known channel state information, pre-coding matrix is designed to pre-process the in-phase and quadrature signals of quadrature spatial modulation(QSM) to reduce the inter-channel interference. In order to lower the complexity at the receiver brought by the orthogonality of the PQSM system, an orthogonal matching pursuit(OMP) detection algorithm and a reconstructed model are proposed. The analysis and simulation results show that the proposed algorithm can obtain a similar bit error rate(BER) performance as the maximum likelihood(ML) detection algorithm with more than 80% reduction of complexity.

Cult Social Prevention Under Psychological Perspective

The breeding and communication of cult are all realized on the base of psychological activities, psychological factors play an important role in preventing and resisting breeding and communication of cult, and in this paper, it demonstrates respectively at this point, and starts from forming the long-term mechanism of the Chinese cult governance and proposes the conception and specific suggestions accordingly of establishing the national psychological assistance system to prevent and resist breeding and communication of cult

Etiology and Prevention of Recurrent Condyloma Accuminata

The possible causes of condyloma acuminatarecurrence arc summarized: such as patients with cellularimmune denciencies, physical therapy triggering subclinicalinfective foci, sowing of the virus particles, and insufficienttherapy. Corresponding preventive measures are addressed,including: immunomodulators improving cellular immunity,ensuring the range and depth of physical therapy, and trcatingsexual partners simultaneously.

Testing Point of Care Portable Data Capture in a Hospital HIV Transmission Prevention Programme and Experience from Computerized Patient Management in a Sub-Saharan Clinic Setting

Clinicians involved in HIV/AIDS （Human Immunodeficiency Virus/Acquired Immune Deficiency Syndrome） prevention of mother to child transmission （PMTCT） programme and research activities can benefit from the advantages that computerized systems add to medical practice even in resource constrained sub-Saharan clinic settings. Their continued use of paper based systems presents clinical data management and patient care challenges. A portable point of care data capture electronic system and a computerized clinic patient management system （CCPMS） were implemented to remedy these challenges. PMTCT report compilation was easier with the portable data collection system whose data were found to be more complete and accurate with a 0.83% error rate compared to a 4.1% error rate in the paper registers. A resounding majority of clinicians preferred using the new CCPMS with many of the view that it improved drug inventory and general clinic management with a positive effect on patient care.