Adaptive audio watermarking based on SNR in localized regions

In this paper, a novel localized audio watermarking scheme based on signal to noise ratio (SNR) to determine a scaling parameter α is proposed. The basic idea is to embed watermark in selected high inflexion regions, and the intensity of embedded watermarks are modified by adaptively adjusting α. As these high inflexion local regions usually correspond to music edges like sound of percussion instruments, explosion or transition of mixed music, which represent the music rhythm or tempo and are very important to human auditory perception, the embedded watermark is especially expected to escape the distortions caused by time domain synchronization attacks. Taking advantage of localization and SNR, the method shows strong robustness against common problems in audio signal processing, random cropping, time scale modification, etc.     

学校社会资本和环境适应

学校为适应环境,必须及时准确地获取环境变动的信息以及应对变动所需的资源.学校社会资本的利用,有助于学校提高觉察和应对环境变动的灵敏度.学校成员个体社会资本能帮助学校获得环境变动的信号和应对资源.通过中间群体层次充分开发个人社会资本,尽量使其转化为学校的社会资本,是学校适应环境的主要途径之一.     

从活动走向课程:高职院校活动课程开发研究

分析了当前高职院校活动课程开设的优势,以及活动课程的理论基础、价值诉求和基本特点,提出了高职院校活动课程设计、开发与实施的路径。     

中等职业学校教师专业发展文献综述

虽然中等职业学校教师专业发展研究是一个新的研究领域,但是已有的研究成果数量众多。这些研究成果涉及中等职业学校教师专业发展的多个维度。对于研究的成果,从内涵、阶段以及专业化这三方面来进行梳理总结,多层次地深化了我们对这一研究的认识,有助于我们对这一研究的深入探讨。     

跨文化交际中俄汉身势语的比较研究

身势语是人类交际中较常见的一种非言语交际手段,在跨文化交际中起着非常重要的作用。身势语的研究不仅与语言使用的研究密切相关,而且与哲学、文化学、心理学、交际学等诸多学科有着密切的关系,因此对身势语的研究,具有十分重要的意义。为此,在阐述身势语的概念、分类以及身势语在跨文化交际中所起的作用的基础上,着重从俄汉民族文化差异的角度来分析俄汉身势语的异同,将其进行比较研究,以便深入掌握俄汉身势语,并在跨文化交际中熟练应用,促进中俄两国之间的文化交流。     

3-6岁外来务工人员子女同伴交往能力的发展特点

同伴交往能力是流动儿童城市社会能力的重要组成部分.本研究对从南通市8所幼儿园选取的587名幼儿的调查显示,流动儿童同伴交往能力发展滞后于本地儿童,但两者不存在显著差异;不同年龄段流动儿童同伴交往能力呈V字形发展态势;流动儿童比本地儿童更具亲社会性,但社交障碍更多,其语言能力也相对滞后;流动男孩在社交主动性、亲社会性上的发展优于女孩,而流动女孩在语言与非语言能力上发展更好,且其社交障碍随年龄的增长而减少.     

一线馆员服务制度的执行优化——以上海师范大学图书馆为例

服务制度执行是将科学的服务制度设计转化为优质服务的最大瓶颈,一线馆员的服务制度执行效率尤为关键。图书馆应从制度设计、执行主体、执行权力配置和执行控制等四个维度优化一线图书馆员服务制度执行。上海师范大学图书馆在服务制度执行方面进行了卓有成效的探索,相关经验值得借鉴。     

DEL RBC transfusion should be avoided in particular blood recipient in East Asia due to allosensitization and ineffectiveness

Previously, both primary and secondary anti-D alloimmunizations induced by "Asian type" DEL (RHD1227A allele) were observed in two incidents. We investigated how often these alloimmunization events occur. The transfusions of any D-negative patients were investigated in the First Affiliated Hospital of Xi’an Jiaotong University Medical College, China, during the entire 2009. The antigens of D, C, c, E, and e were routinely serotyped. The "Asian type" DEL variant was genotyped and the RHD heterozygote was determined through two published methods. The changes in anti-D levels were monitored by the indirect antiglobulin test (IAT) and flow cytometry. Thirty D-negative transfused patients were included in the study. We focused on 11 recipients who were transfused with packed red blood cells (RBCs) from DEL donors at least one time. Of those 11 recipients, seven were anti-D negative before transfusion and four were anti-D positive (one patient with an autoantibody). One of the seven pre-transfusion anti-D negative patients produced a primary-response anti-D after being transfused with 400 ml of DEL blood twice. All four pre-transfusion antibody positive patients were not observed hemoglobin (Hb) levels increased, as expected after transfusions. Two patients had an increase in anti-D from 1:8 to 1:64 by IAT, which was also shown by flow cytometry. None of the patients experienced an acute hemolytic episode. Our data indicated that the primary anti-D induced by DEL transfusion or the secondary anti-D elevated by DEL in a truly D-negative patient might not be unusual. We suggest that a truly D-negative childbearing-aged woman should avoid DEL transfusion to protect her from primary anti-D allosensitization. In addition, anti-D positive recipients should also avoid DEL red cell transfusion due to the delayed hemolytic transfusion reaction (DHTR).     

Comparison of various procedures for progressive collapse analysis of cable-stayed bridges

Alternate path(AP) method is the most widely used method for the progressive collapse analysis,and its application in frame structures has been well proved.However,the application of AP method for other structures,especially for cable-stayed structures,should be further developed.The four analytical procedures,i.e.,linear static,nonlinear static,linear dynamic,and nonlinear dynamic were firstly improved by taking into account the initial state.Then a cable-stayed structure was studied using the four improved methods.Furthermore,the losses of both one cable and two cables were discussed.The results show that for static and dynamic analyses of the cable-stayed bridges,there is large difference between the results obtained from simulations starting with either a deformed or a nondeformed configuration at the time of cable loss.The static results are conservative in the vicinity of the ruptured cable,but the dynamic effect of the cable loss in the area farther away from the loss-cable cannot be considered.Moreover,the dynamic amplification factor of 2.0 is found to be a good estimate for static analysis procedures,since linear static and linear dynamic procedures yield approximately the same maximum vertical deflection.The results of the comprehensive evaluation of the cable failure show that the tread of the progressive failure of the cable-stayed bridges decreases when the location of the failed cables is closer to the pylon.     

浅谈高校旅游英语的教学改革

随着我国经济的发展,旅游行业在发展的过程中,不仅要面对国内市场,同时还要面对国外市场。因而在交流的过程中,急需一批旅游英语的人才。而高校作为人才培养的重要基地,不仅肩负着人才培养的重任,同时还关系着我国社会主义的建设。在高校旅游英语教学中,以往的教学模式已无法适应新时期的教学需求,在此,本文针对高校旅游英语的教学改革,做以下论述。