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金佛山方竹2个种源1年生实生苗生长的比较研究

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竹子学报 2024年第2期43卷 44-49页

作者：方水元凡美玲张勤徐若琪刘凡巧丁雨龙林树燕贵州省桐梓县林业局贵州桐梓563200 南京林业大学南方现代林业协同创新中心/竹类研究所江苏南京210037

【目的】为提高造林存活率,减小造林成本,通过对比金佛山方竹(Chimonobambusa utilis)2个种源实生苗生长差异,选择优良的实生苗上山造林。【方法】该研究选择贵州省桐梓县箐坝、黄莲2个种源的种子进行育苗,对金佛山方竹2个种源1年生实... 详细信息

【目的】为提高造林存活率,减小造林成本,通过对比金佛山方竹(Chimonobambusa utilis)2个种源实生苗生长差异,选择优良的实生苗上山造林。【方法】该研究选择贵州省桐梓县箐坝、黄莲2个种源的种子进行育苗,对金佛山方竹2个种源1年生实生苗的生长进行比较研究。【结果】2个种源1年生实生苗各指标随时间呈正比例上升,由于气温影响,各生长指标在冬季生长量均较小,箐坝种源实生苗最大株高和地径2个指标均优于黄莲种源实生苗,但分蘖数和叶片数2个指标表现为黄莲种源优于箐坝种源实生苗。【结论】通过聚类分析,选择最大株高、地径和分蘖数3个指标作为1年生方竹实生苗对比指标,将实生苗划分为4个等级,Ⅰ级(优)、Ⅱ级(良)、Ⅲ级(中)和Ⅳ级(差),以期为方竹的育苗及引种推广提供理论依据。

关键词：金佛山方竹实生苗比较研究

非金属元素C、N、F掺杂锐钛矿型TiO_2的缺陷形成能和电子性质

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功能材料 2013年第13期44卷 1879-1883页

作者：岳远霞冯庆王寅重庆师范大学物理与电子工程学院重庆401331 重庆市光电功能材料重点实验室重庆401331

非金属杂质掺杂TiO2半导体改善对可见光区域的光催化性质是近年来的一个研究热点,但相关杂质缺陷的形成能研究却不多。通过基于密度泛函理论的平面波超软赝势方法,研究了非金属元素C、N、F掺杂锐钛矿型TiO2之后的缺陷形成能与电子性质... 详细信息

非金属杂质掺杂TiO2半导体改善对可见光区域的光催化性质是近年来的一个研究热点,但相关杂质缺陷的形成能研究却不多。通过基于密度泛函理论的平面波超软赝势方法,研究了非金属元素C、N、F掺杂锐钛矿型TiO2之后的缺陷形成能与电子性质。结果表明,3种元素掺杂进入TiO2后缺陷形成能的大小排序为C>N>F,说明F元素最容易掺杂进入TiO2晶格。但是掺入F元素后对TiO2禁带宽度的改变不大,在提高TiO2对可见光的响应方面F元素的效果不如N、C两种元素。因此,对于掺杂来改善TiO2对可见光的响应方面,N元素比C、F的效果更好。

关键词：第一性原理密度泛函理论 C,N,F掺杂缺陷形成能电子性质

Application of Detecting Part's Size Online Based on Machine Vision

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Application of Detecting Part's Size Online Based on Machine...

Improving effect of Sivelestat on LPS-induced lung injury in rats

2012 International Conference on Future Energy,Environment,and Materials

作者： Tian yuan-yuan Liu Si-yang Tan qing-chang School of Mechanical Engineering Northeast Dianli University Mechanical Science and Engineering College Jilin University

In order to use a method untouched to measure part’s size, detection system is built. The research is on characteristic point detection, CCD camera calibration and distance detection between two special points. Firstly, the theory of edge detection based on Gauss point spread function is introduced. Secondly, it is calibrated using the characteristic points on the edge. Then a simple CCD calibration method of resolving the solution is deduced to solve the related parameters of model. Finally, 3D special coordinates of characteristic points detected can be obtained by the model. It is realized to detecting part size process online by calculating the distance between two special points. The experimental result shows that when physical length is 0.6 times than focal length, the given precise of measuring result can reach nearly 0.006 mm. The precise of image is stable.

关键词： machine vision super resolution reconstruction sub-pixel edge detection

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Improving effect of Sivelestat on LPS-induced lung injury in...

维持黄河下游主槽平滩流量4000m^3/s所需水量

中华医学会呼吸病学年会——2013（第十四次全国呼吸病学学术会议）

作者： qing yuan Yanwen Jiang Qiuhong Fang Department of Pulmonary and Critical Care Medicine Beijing Shijitan Hospital Affiliated to Capital Medicine University

Sepsis causes neutrophil sequestration in the lung which leads to acute lung injury(ALI).Neutrophil elastase(NE) is thought to play a important role in the pathogenesis of *** study investigated whether Sivelestat,a specific NE inhibitor,can attenuate ALI induced by *** vivo,30 Wistar rats were divided into three groups(n = 10 each groups) on the basis of the reagent used,which were subjected to LPS injection with or without Sivelestat treatments to induce ALI

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水利学报 2007年第9期38卷 1140-1144页

作者：刘晓燕申冠卿李小平张原锋黄河水利委员会河南郑州450003 黄河水利科学研究院河南郑州450003

基于黄河下游历史实测资料,分析了流量、水量、含沙量和来沙量等主要因素与主槽形态的响应关系,通过对未来入黄泥沙形势、黄河下游洪水形势、黄河下游不同量级洪水的挟沙能力、不同量级及历时的洪水塑槽机理分析,阐述了小浪底水库运用... 详细信息

基于黄河下游历史实测资料,分析了流量、水量、含沙量和来沙量等主要因素与主槽形态的响应关系,通过对未来入黄泥沙形势、黄河下游洪水形势、黄河下游不同量级洪水的挟沙能力、不同量级及历时的洪水塑槽机理分析,阐述了小浪底水库运用后进入黄河下游的泥沙将主要在洪水期下泄的特点,以及未来下游来沙量8亿~9亿t情况下,黄河下游主槽不萎缩所需洪水条件,即维持下游主槽过流能力4000m3/s左右,对应的塑槽水量应维持在60亿~70亿m3。

关键词：主槽平滩流量输沙量径流条件

中药创新创业教育资源整合策略探讨——以北京中医药大学为例

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创新创业理论研究与实践 2024年第12期7卷 11-14,21页

作者：詹雪艳李月婷高晓燕王颖黄建梅袁瑞娟沈蒙北京中医药大学中药学院北京100029

目前,很多中医药院校中药专业学生创新创业能力不足,创新创业成果转化为商业成果的水平比较低。中药创新创业教育如何走出适合自己的发展之路,需要在充分了解中药创新创业教育实际情况的基础上,在考虑创新创业教育共同规律的同时坚持创... 详细信息

目前,很多中医药院校中药专业学生创新创业能力不足,创新创业成果转化为商业成果的水平比较低。中药创新创业教育如何走出适合自己的发展之路,需要在充分了解中药创新创业教育实际情况的基础上,在考虑创新创业教育共同规律的同时坚持创新创业教育与专业教育相结合,整合各类中药创新创业资源,注重“政策法规—实践资源—项目成果”“三位一体”整合中药创新创业教育可存储的资源,“宣传—参与—合作—提升”过程式地整合创新创业大赛的实践资源,“师资—教育技术”互补地整合中药创新创业教学资源,促进资源合理化利用,为中药创新创业教育的发展提供借鉴。

关键词：教育资源整合策略创新创业中药专业 “三位一体” 专业教育融合

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Abnormal Effective Connectivity in the Brain is Involved in Auditory Verbal Hallucinations in Schizophrenia

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Neuroscience Bulletin 2017年第3期33卷 281-291页

作者： Baojuan Li Long-Biao Cui Yi-Bin Xi Karl J.Friston Fan Guo Hua-Ning Wang Lin-Chuan Zhang yuan-Han Bai qing-Rong Tan Hong Yin Hongbing Lu School of Biomedical Engineering Fourth Military Medical UniversityXi'an 710032China Department of Radiology Xijing HospitalFourth Military Medical UniversityXi'an 710032China Wellcome Trust Center for Nettroimaging Institute ofNeurologyUniversity College LondonLondon WC1N 3BGUK Department of Psychiatry Xijing HospitalFourth Military Medical UniversityXi'an 710032China

Information flow among auditory and language processing-related regions implicated in the pathophysiology of auditory verbal hallucinations（AVHs） in schizophrenia（SZ） remains unclear. In this study, we used stochastic dynamic causal modeling（s DCM） to quantify connections among the left dorsolateral prefrontal cortex（inner speech monitoring）, auditory cortex（auditory processing）, hippocampus（memory retrieval）, thalamus（information filtering）, and Broca＇s area（language production） in 17 first-episode drug-na？¨ve SZ patients with AVHs, 15 without AVHs, and 19 healthy controls using resting-state functional magnetic resonance ***, we performed receiver operating characteristic（ROC） analysis and correlation analysis between image measures and symptoms. s DCM revealed an increasedsensitivity of auditory cortex to its thalamic afferents and a decrease in hippocampal sensitivity to auditory inputs in SZ patients with AVHs. The area under the ROC curve showed the diagnostic value of these two connections to distinguish SZ patients with AVHs from those without AVHs. Furthermore, we found a positive correlation between the strength of the connectivity from Broca＇s area to the auditory cortex and the severity of AVHs. These findings demonstrate, for the first time, augmented AVHspecific excitatory afferents from the thalamus to the auditory cortex in SZ patients, resulting in auditory perception without external auditory stimuli. Our results provide insights into the neural mechanisms underlying AVHs in SZ. This thalamic-auditory cortical-hippocampal dysconnectivity may also serve as a diagnostic biomarker of AVHs in SZ and a therapeutic target based on direct in vivo evidence.

关键词： Effective connectivity Stochastic dynamic causal modeling Auditory verbal hallucinations Schizophrenia

Environmentally Induced Paternal Epigenetic Inheritance and Its Effects on Offspring Health

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Reproductive and Developmental Medicine 2017年第2期1卷 89-99页

作者： Zhao Zheng-Hui Schatten Heide Sun qing-yuan State Key Laboratory of Stem Cell and Reproductive Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100101China Department of Veterinary Pathobiology University of MissouriColumbiaMO 65211USA

Increasing evidences indicate that chronic diseases in offspring may be the result of ancestral environmental exposures. Exposures to environmental compounds in windows of epigenetic susceptibility have been shown to promote epigenetic alterations that can be inherited between generations. DNA methylation, histone modifications, and noncoding RNAs are sound mechanistic candidates for the delivery of environmental information from gametes to zygotes. This review focuses mainly on paternal exposures and assesses the risk of epigenetic alterations in the development of diseases, providing insights into relationships between aberrant sperm epigenetic patterns and offspring health. Elucidation of the mechanisms underlying environmental epigenetic information that survive from epigenetic reprogramming and its transmission to future generations may hold a great promise for providing therapeutic targets for epigenetic diseases associated with environmental exposures.

关键词： Environmental Exposures Offspring Health Sperm Transgenerational Epigenetic Inheritance

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中国出口企业“生产率之谜”研究进展与启示

国际经贸探索 2014年第7期30卷 108-120页

作者：刘晴张源媛合肥工业大学经济学院安徽合肥230009 上海财经大学国际工商管理学院上海200433

近期的经验研究发现中国出口企业的生产率低于非出口企业。由于与经典异质性企业贸易模型的主要预测不一致,这一经验事实被称为"生产率之谜"。中国出口企业"生产率之谜"是目前学术界关注的热点之一。文章通过回顾国内外现有研究"生产率... 详细信息

近期的经验研究发现中国出口企业的生产率低于非出口企业。由于与经典异质性企业贸易模型的主要预测不一致,这一经验事实被称为"生产率之谜"。中国出口企业"生产率之谜"是目前学术界关注的热点之一。文章通过回顾国内外现有研究"生产率之谜"的理论和经验文献,梳理了文献在研究时间和研究议题上的逻辑关系,比较了文献在研究方法和研究结论等方面的异同,并尝试性地提出未来的研究思路。

关键词：生产率之谜出口企业异质性