走近蓝牙技术

在无线通讯领域，蓝牙技术引起了越来越多的人的关注。本文介绍了蓝牙技术的起源及工作原理。阐述了它在实际生活中的应用。并对蓝牙技术的进一步发展提出展望。     

FFH/MFSK系统抗干扰性能研究

针对FFH/MFSK通信系统的特点,推导了在赖斯衰落信道下,多音干扰产生的虚警检测概率和漏检概率数学表达式,并研究了不同参数对系统BER性能的影响. 仿真结果表明,在多音干扰功率大于一定值时,多音干扰数量是造成系统BER性能下降的主要因素.     

制药企业产品跳转行为的法律规制——基于产品创新与产品垄断的视角

根据产品跳转的时机、方式以及后果,制药企业产品跳转行为或属于产品创新,或表现为产品垄断。我国与西方国家在规制制药企业产品跳转行为的路径上存在着优先顺序上的差异。在国家促进仿制药市场健康发展的背景下,我国规制制药企业产品跳转行为的合理路径应是优先适用专利法,严格遵守专利授予标准,并推进专利法与反垄断法、药品管理制度等法律规范的和谐共生。     

滚动码技术在车库防盗系统中的应用

介绍一种加密和解密技术———滚动码技术,并在对滚动码技术优点进行分析的基础上,利用HCS301滚动码编码器和PIC16C54单片机开发了一种可靠性和安全性较高的车库智能防盗系统.     

不同家庭收入的高校大学生就业心理对比分析

对不同家庭收入的高校大学生就业心理分析得知：家庭收入在千元以上大学生和家庭收入在千元以下的大学生在自负、怯懦、攀比和依赖心理方面存在着差异，家庭收入在千元以上的大学生存在着较强的自负心理、怯懦心理、攀比心理和依赖心理。     

Charge transport in conducting polyaniline co-doped with sulfosalicylic acid and dodecylbenzoyl sulfonic acid

We prepared conducting polyaniline （PAn） co-doped with sulfosalicylic acid （SSA） and dodecylbenzoyl sultonic acid （DBSA） in micro-emulsive polymerization, and studied its charge transport behaviors based on the measurement of its electrical conductivity in the temperature range between 203 K and 298 K. The conductivity was found to increase with temperature, similar to the case in semiconductors. Analyzing the experimental data with three models, namely the charge-energy-limitedtunneling model, Kivelson model and the three-dimensional variable range hopping （3D-VRH） model demonstrated that these models all describe well the charge transport behaviors of PAn co-doped with SSA and DBSA within the mentioned temperature range. From calculation with the 3D-VRH model, the hopping distance of the conducting PAn is obviously larger than its localization length. The PAn doped with SSA and DBSA enjoys desirable crystallinity due to the co-doping of two functional sulfonic acids. The macroscopic conductivity may correspond to three-dimensional transport in the network of the bundles, and the metallic islands may be attributed to quasi-one-dimensional bundles.     

Reliability and validity of field-based measures of leg stiffness and reactive strength index in youths

Abstract

The aim of the study was to assess the reliability of a mobile contact mat in measuring a range of stretch–shortening cycle parameters in young adolescents. Additionally, vertical leg stiffness using contact mat data was validated against a criterion method using force–time data. The reliability study involved 18 youths completing a habituation and three separate test sessions, while 20 youths completed a single test session for the validity study. Participants completed three trials of a squat jump, countermovement jump, and maximal hopping test and a single trial of repeated sub-maximal hopping at 2.0 Hz and 2.5 Hz. All tests were performed on the contact mat. Reliability statistics included repeated-measures analysis of variance, intraclass correlation coefficient, and coefficient of variation (CV), while the correlation coefficient (r) and typical error of estimate (TEE) were reported for the validity study. Squat jump height was the most reliable measure (CV = 8.64%), while leg stiffness during sub-maximal hopping, and reactive strength index produced moderate reliability (CV = 10.17–13.93% and 13.98% respectively). Measures of leg stiffness obtained from contact mat data during sub-maximal hopping were in agreement with the criterion measure (r = 0.92–0.95; TEE = 6.5–7.5%), but not during maximal hopping (r = 0.59; TEE = 41.9%). The contact mat was deemed a valid tool for measuring stretch–shortening cycle ability in sub-maximal but not maximal hopping. Although reliability of performance was generally moderate, the tests offer a replicable assessment method for use with paediatric populations.     

跳频多址系统盲空时干扰消除算法研究

提出了适合无中心控制的对等网络的盲空时自适应干扰消除算法．本算法利用检测信号功率恒定的特点，采用了两个滤波器组，当其中一个工作时，另一个开始调整权系数，从而提高了收敛速度，避免了跳频频率变化带来的波束估计误差．仿真结果表明，提出的盲自适应算法可以明显提高输出信号SINR增益．     

大学生求职择业中常见的心理问题及应对策略

分析了当代大学生求职择业过程中常见的心理问题、心理障碍,结合现实分析了它们产生的原因,并提出了大学生在遇到这些问题时可以采取的应对策略和自我调适的方法,对当前大学生就业指导工作的开展具有一定的现实意义.     

基于高校心理健康教育需求的就业信息资源建设问题探析

就业信息是大学生充分就业的重要保障,有助于就业心理的健康发展。本文针对大学生就业现状及其面临的就业心理问题,分析就业信息资源在大学生就业中的重要作用,提出构建完善的就业信息体系,促进大学毕业生充分就业,保证大学生就业心理的健康发展。