对林业职业技能鉴定工作的几点思考

职业技能鉴定工作是提高从业人员整体素质,培养造就大批实用型技能人才的有效手段和途径,在现代林业建设中有着重要的意义。近年来,我国职业技能鉴定工作规模不断增加,范围不断扩大。在自组织开展鉴定工作以来,林业职业技能鉴定工作取得了显著成绩,但也存在一些亟待解决的问题。加强林业职业技能鉴定工作要从多方面努力。     

论商务谈判中的谎言及其识别策略

谎言是商务谈判中的常态.谎言及其识别是每个谈判者必须面对的问题,谈判双方相互缺乏信任,以及信息的缺失是造成谎言的两大主因.歪曲事实、夸大事实、隐瞒事实和虚假的承诺以及额外的要求是谎言的主要表现形式.谎言会引起说谎者在情绪、语言的内容和尝试控制自己的行为等三个方面的变化.识别谎言的主要方法有三种:非语言行为识别、语言行为识别和生理反应识别.     

数控切削中粗车循环参数确定初探

介绍了G71循环加工指令的格式、各参数的含义及其确定方法,并给出了编程实例,以提高编程质量和加工效率．     

新加坡《好儿童华文》教材的语言变异及其成因——多重认同视野下的观察

《好儿童华文》是新加坡曾经流行的一套小学华文教材,当中有许多与标准汉语不太一样的表达方式。要解释这些变异项目为何存在,需要跳出本土汉语概念的框框,跳出本土社区汉语的范围,单一变异的角度已经不能适应越来越复杂的汉语国际化及华语当地化的现实。从多重认同的角度来看,这些具有本地特色的语言项目,既是新加坡华族实现族群和国家认同的重要标志,也是新加坡华社沟通和群体认同的凭借。在处于新加坡华文教学的几对矛盾中,教材的语言变异项目有必要在其中保持平衡,予以区别对待。     

大学核心竞争力的识别和培育

伴随着信息时代的挑战、技术的爆炸和知识全球化的态势,大学所处的外部环境已经发生了巨大变化,迫使大学转变传统办学方式,在变革中求得生存和发展。大学核心竞争力是当前高校改革转型的关节点,也是现代学校竞争的关键。大学要想在竞争申获胜,就必须识别和培育本校核心竞争力,井通过大学知识创新、组织创新、制度创新和文化创新保持并提升核心竞争力。     

Optimal waveband identification for estimation of leaf area index of paddy rice

The objectives of the study were to select suitable wavebands for rice leaf area index (LAI) estimation using the data acquired over a whole growing season, and to test the efficiency of the selected wavebands by comparing them with feature positions of rice canopy spectra. In this study, the field experiment in 2002 growing season was conducted at the experimental farm of Zhejiang University, Hangzhou, China. Measurements of hyperspectral reflectance (350-2500 nm) and corresponding LAI were made for a paddy rice canopy throughout the growing season. And three methods were employed to identify the optimal wavebands for paddy rice LAI estimation: correlation coefficient-based method, vegetation index-based method, and stepwise regression method. This research selected 15 wavebands in the region of 350-2500 nm, which appeared to be the optimal wavebands for the paddy rice LAI estimation. Of the selected wavebands, the most frequently occurring wavebands were centered around 554, 675, 723, and 1633 nm. They were followed by 444, 524, 576, 594, 804, 849, 974, 1074, 1219, 1510, and 2194 nm. Most of them made physical sense and had their counterparts in spectral known feature positions, which indicates the promising potential of the 15 selected wavebands for the retrieval of paddy rice LAI.     

论高职生认同与践行社会主义核心价值观

社会主义核心价值观主导全社会的思想道德观念和行为方式。积极培育和践行社会主义核心价值观才能建设中国特色社会主义现代化强国,才能凝聚起中华民族伟大复兴的磅礴力量。该文以高职生现有的价值观为出发点,从理论认同、情感认同和行为认同三方面论述高职生社会主义核心价值观“内化于心”,最终高职生能够做到爱国、敬业、诚信、友善,积极践行社会主义核心价值观“外化于行”。     

Evaluation and application of an efficient plant DNA extraction protocol for laboratory and field testing

Nucleic acids in plant tissue lysates can be captured quickly by a cellulose filter paper and prepared for amplification after a quick purification.In this study,a published filter paper strip method was modified by sticking the filter paper on a polyvinyl chloride resin(PVC)sheet.This modified method is named EZ-D,for EASY DNA extraction.Compared with the original cetyl trimethylammonium bromide(CTAB)method,DNA extracted by EZ-D is more efficient in polymerase chain reaction(PCR)amplification due to the more stable performance of the EZ-D stick.The EZ-D method is also faster,easier,and cheaper.PCR analyses showed that DNA extracted from several types of plant tissues by EZ-D was appropriate for specific identification of biological samples.A regular PCR reaction can detect the EZ-D-extracted DNA template at concentration as low as 0.1 ng/μL.Evaluation of the EZ-D showed that DNA extracts could be successfully amplified by PCR reaction for DNA fragments up to 3000 bp in length and up to 80%in GC content.EZ-D was successfully used for DNA extraction from a variety of plant species and plant tissues.Moreover,when EZ-D was combined with the loop-mediated isothermal amplification(LAMP)method,DNA identification of biological samples could be achieved without the need for specialized equipment.As an optimized DNA purification method,EZ-D shows great advantages in application and can be used widely in laboratories where equipment is limited and rapid results are required.     

Identifying and Nurturing Gifted Children in Israel

The article describes Israel’s approach to the education of gifted and talented children. It describes the programs for gifted and talented children in Israel and the process for selecting students for these programs. The method of selecting students for programs is consistent with the Ministry of Education’s definition of giftedness, the goals of the giftedness programs, and the characteristics of these programs. The selection method is affected by the standards required of the instruments as well as other constraints, such as the constraints on funding for this purpose.The author of this article is the director of the Szold Institute program for identifying gifted children. The project is funded by the Israeli Ministry of Education     

基于暗通道先验与 YOLO 的水下河蟹识别研究

为解决全自动均匀投饵作业船在河蟹养殖过程中投饵不精准问题,引入水下摄像设备采集图像,但采集的图像存在对比度低、模糊和图像退化等问题。为此,采用暗通道先验提高图像对比度。利用 YOLO 卷积神经网络技术快速准确地识别出低照度环境下的河蟹,识别准确率达到 98%,平均耗时 50ms。获得河蟹生长、分布信息后测算出河蟹养殖密度,为全自动均匀投饵作业船精准投饲提供数据支持