敦煌绿洲1955 年至2010 年胡杨年生长季对气候变化的响应     

刘普幸  杨泉 《资源科学》2012,34(3):566-571

利用敦煌绿洲气象站1955年-2010年日平均气温资料,采用气候倾向率、Mann-Kendall检验、相关分析及Morlet小波功率谱等方法分析了研究区胡杨生长季对全球气候变化的响应。结果表明：近56a来,研究区胡杨年生长季有开始日提前,终止日推后,年生长季天数延长的趋势;展叶始日有提前趋势,叶黄初日有推后趋势。胡杨生长季开始日、展叶始日分别与3月和4月平均气温呈负相关关系,胡杨生长季终止日、生长期天数及叶黄初日分别与10月、3月-11月及8月-9月平均气温呈正相关关系。胡杨生长季开始日、终止日、生长季天数、展叶期及叶黄初日均具有多个突变,存在3.77~8.33a的短尺度周期,这反映出研究区胡杨生长季对气候变化响应十分敏感。  相似文献   

在电子实习中引入红外线心率计教学实践     

朱朝霞  唐建祥  詹雯 《中国现代教育装备》2010,(19):154-156

结合电子实习教学及培养学生工程实践能力的要求,引入红外线心率计作为电子实习制作产品,并介绍了红外线心率计的实践教学流程、教学思路及达到的教学效果。  相似文献   

DPSK调制格式在40 Gbit/s单信道中传输特性分析     

王现彬  卢智嘉  杨彦彬  杨洁  张晶 《石家庄学院学报》2010,12(3):21-26

分析了DPSK调制格式的产生方式和频域特性,在分别考虑色散、PMD和非线性效应的情况下,通过求解非线性薛定谔方程,仿真了NRZ-DPSK,33%RZ-DPSK,50%RZ-DPSK和CSRZ-DPSK调制格式在40 Gbit/s单信道中的传输特性.仿真结果表明,在单独考虑色散和PMD的情况下,33%RZ-DPSK调制格式特性较好,在综合考虑色散、PMD和非线性效应情况下,CSRZ-DPSK调制格式特性更好.  相似文献   

室内照明设备开关智能控制器的研究与设计     

柳延东 《南宁师范高等专科学校学报》2010,27(3):29-32

室内照明设备开关智能控制器是一种以热释电红外感应技术为支撑技术的电源开关控制装置。此控制器主要由一个双探头热释电红外线探测模块、一个热释电红外线传感器伺服及控制模块、一个延时修正模块及一个可调节角度的遮光罩构成。它可以实现智能分区域开启或延时关闭照明设备,具有较高的灵敏度和稳定性。  相似文献   

利用ICP—AES法同时测定松花鸡蛋中钙、铁、锌、铜含量     

赵国升  王强 《通化师范学院学报》2010,31(2):28-29

湿法消解样品后,文中利用ICP—AES法同时测定松花鸡蛋中钙、铁、锌、铜4种微量元素的含量．在优化实验条件下,RSD为0．30％-1．30％,加标回收率为95．45％-110．28％．方法简便、快速、准确、灵敏．  相似文献   

近红外光谱分析技术的研究与应用     

杨琼  项瑜  杨季冬 《四川三峡学院学报》2013,(3):89-91

基于重庆市高校创新团队＂近红外光谱检测技术研究及其应用＂的建设与发展,重点介绍了近红外光谱分析技术的发展,研究了近红外光谱分析技术在三峡库区特色资源的快速检测的应用.  相似文献   

基于分形的快速最大熵红外图像特征检测     

谭晓静 《重庆师专学报》2013,(5):119-123

文章针对红外图像目标检测问题,提出一种基于分形的快速最大熵的红外图像特征检测算法.该算法利用DBC方法计算分维数,根据人造物和自然背景分形维差异,确定目标区域;最后,通过二维最大熵原则确定最佳阈值,实现对单目标或者多目标图像分割.该算法能够较好实现红外图像特征检测,有效抑制背景和噪声.  相似文献   

Students with autism in regular classes: a long-term follow-up study of a satellite class transition model     

Elaine Keane  Fiona Jane Aldridge  Trevor Clark 《International Journal of Inclusive Education》2013,17(10):1001-1017

Students with autism spectrum disorders (ASDs) are increasingly being educated within mainstream schools. While there is often an assumption that students with ASD who are academically capable will succeed in an inclusive educational placement, previous research has indicated that this is not always the case. Indeed, it seems that students with ASDs are often not equipped to cope with the social and communication demands of a mainstream classroom. Autism Spectrum Australia's (Aspect) satellite class programme aims to address this gap by blending specialised intervention with strategies to prepare students and receiving schools for transition to more inclusive educational placements. A long-term follow-up study comprising a parent survey of satellite class graduates and four detailed case studies was undertaken to determine whether these classes led to successful placement of students with ASD in more inclusive educational settings. Results indicated that a majority of graduates remained placed in more inclusive educational settings. Overall, parents were satisfied with the programme. Attendance at a satellite class was just one of a number of factors associated with positive outcomes in late adolescence. These findings are discussed in terms of their implications for teachers and school staff planning for and supporting students with ASDs in their transition to inclusive educational settings.  相似文献   

Including people with disabilities: an indigenous perspective     

Jill Bevan-Brown 《International Journal of Inclusive Education》2013,17(6):571-583

Being victims of racial prejudice, religious intolerance, poverty, disempowerment and language loss it could be expected that indigenous people would be supportive of the Inclusion Movement with its philosophy of valuing and acceptance of all people. This supposition is examined for Māori, the indigenous people of Aotearoa/New Zealand. In particular, three research studies investigating Māori perspectives of intellectual disability, blindness and vision impairment, and autism spectrum disorder (ASD) are examined for evidence of inclusive and exclusive attitudes and practices. Findings show that while Māori participants’ opinions varied, people with intellectual disabilities, ASD, blindness and vision impairment were generally valued family members and many examples of inclusive attitudes and practices were shared. Core Māori values support Inclusion. It is proposed that incorporating these values into education and disability services will not only result in more culturally appropriate provisions for Māori but will also contribute to the greater inclusion of all disabled people whatever their ethnicity.  相似文献   

电动书架控制系统的设计与实现     

梁盈富 《金华职业技术学院学报》2013,13(3):44-47

针对设计的一种电动书架,开发了其电气控制装置,使书架能够实现旋转运动、上下移动、到位检测和报警功能。完成了该书架控制系统的软件和硬件设计,对书架的运动控制采用红外遥控的控制方式,编制了遥控解码程序。结果表明,该控制系统能够使书架稳定运行,为人们的使用提供了极大的方便。  相似文献