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Growth at the microscale:long term thinning effects on patterns and timing of intra-annual stem increment in radiata pine

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Forest Ecosystems 2018年第4期5卷 438-450页

作者： david M.Drew Geoffrey M.Downes Department of Forest and Wood Science Stellenbosch UniversityPrivate Bag X1Matieland 7800South Africa Forest Quality Pty Ltd PO Box 293 HuonvilleTASAustralia.

Background: Stem radial growth in forests is not uniform. Rather, it is characterized by periods of relatively fast or slow growth, or sometimes no growth at all. These fluctuations are generally a function of varying environmental conditions(e.g. water availability) and, importantly, will also be associated with adjustments in proprties in the wood formed. Stand level conditions and forest management, particularly thinning and stand density will, thowever, also have a major influence on patterns of growth variation. We explore how different thinning histories and/or stand densities influence these dynamics of tree growth in the important commercial plantation species Pinus radiata D. ***: Daily stem size change was measured using electronic point dendrometers over two growing seasons on P. radiata trees at two sites, subjected to different thinning regimes. Timing, rates and periodicity of annual growth were calculated from these ***: Greater overall cross-sectional growth in thinned plots was driven mainly by two dynamics. First, the cessation of seasonal growth occurred at least 3 weeks later in the stands in which thinning had taken place. There was no difference between thinned/unthinned stands, however, in the timing of growth onset. Second, within the longer season, trees in thinned plots had more growth days(as much as 20% more) than unthinned plots. The rates of growth on days when growth occurred were not different, however. In this context, it is notable that in trees in the unthinned plots experiencing the most severe competition there were strong "pulses" of growth following drought-breaking rainfall events. Unthinned plots at high stand densities also maintained a smaller(but consistent) zone of dividing cells throughout the season than thinned ***: In Pinus radiata growing under conditions as in our study, conditions late in summer, particularly drought, have an important effect on the timing of cessation of growth. Earl

关键词： Monterey pine Dendrometer Intra-annual growth Drought Thinning

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Defence force activities in marine protected areas:environmental management of Shoalwater Bay Training Area,Queensland,Australia

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Chinese Journal of Oceanology and Limnology 2010年第3期28卷 667-676页

作者：武文王小华 david PAULL Julie KESBY School of Physical Environmental and Mathematical Sciences University of New South Wales at Australian Defence Force Academy College of Physical and Environmental Oceanography Ocean University of China

Environmental management of military activities is of growing global concern by defence forces. As one of the largest landholders in Australia, the Australian Defence Force （ADF） is increasingly concerned with sustainable environmental management. This paper focuses on how the ADF is maintaining effective environmental management, especially in environmentally sensitive marine protected areas. It uses Shoalwater Bay Training Area （SWBTA） as a research example to examine environmental management strategies conducted by the ADF. SWBTA is one of the most significant Defence training areas in Australia, with a large number of single, joint and combined military exercises conducted in the area. With its maritime component contained in the Great Barrier Reef Marine Park （GBRMP）, the Great Barrier Reef World Heritage Area （GBRWHA）, and abutting Queensland＇s State Marine Parks, it has high protection values. It is therefore vital for the ADF to adopt environmentally responsible management while they are conducting military activities. As to various tools employed to manage environmental performance, the ISO 14001 Environmental Management System （EMS） is widely used by the ADE This paper exanlines military activities and marine environmental management within SWBTA, using the Talisman Saber （TS） exercise series as an example. These are extensive joint exercises conducted by the ADF and the United States defence forces. The paper outlines relevant legislative framework and environmental policies, analyses how the EMS operates in environmental management of military activities, and how military activities comply with these regulations. It discusses the implementation of the ADF EMS, including risk reduction measures, environmental awareness training, consultation and communication with stakeholders. A number of environmental management actions used in the TS exercises are presented to demonstrate the EMS application. Our investigations to this point indicate that the ADF is co

关键词： Australian Defence Force marine protected areas Environmental Management System Shoalwater Bay Training Area

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上海靖予霖律师事务所

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检察风云 2021年第10期 2-2页

作者： SHANGHAI kind ALL LAW FIRM 上海靖予霖律师事务所

律所介绍上海靖予霖律师事务所,由知名刑事律师、"靖霖"刑辩品牌创始人徐宗新律师领衔创建,汇集来自法院、检察、公安、国安、军队资深实务人才,狠抓内训,精研业务,培养人才,培育产品,系专门从事刑事法律服务(刑事辩护、刑事代理、刑事...

律所介绍上海靖予霖律师事务所,由知名刑事律师、"靖霖"刑辩品牌创始人徐宗新律师领衔创建,汇集来自法院、检察、公安、国安、军队资深实务人才,狠抓内训,精研业务,培养人才,培育产品,系专门从事刑事法律服务(刑事辩护、刑事代理、刑事合规)的律师事务所。上海靖予霖律师事务所与浙江靖霖律师事务所及各分所共同成立靖霖刑事律师机构,并作为机构的总部,

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Some Approaches to Corpus Stylistics

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外国语 2010年第2期33卷 67-81页

作者： david L. Hoover New York University U. S. A

This article explores some ways that corpus stylistics can be valuable to literary studies. Corpus study is full of surprises and the examples of serendipitous insights presented here suggest that corpus stylistics can be valuable as a discovery technique a way to uncover unexpected questions and insights. By providing access to evidence that has never been available before it can also strengthen and deepen traditional literary and stylistic analysis. Specially created literary corpora facilitate the investigation of style variation within a single text or a group of related texts. Creating a corpus of epistolary novels makes it possible to compare how well different authors succeed in creating different voices for their letter-writers. Treating a single epistolary novel or a novel with multiple narrators as a corpus makes it is possible to explore the degree to which an author has succeed in creating distinct individual voices within a novel. Huge natural language corpora and web searches can be used in a very different kind of corpus stylistics providing access to novel kinds of tangible and persuasive evidence that can supplement or correct literary intuition.

关键词：语言学语言艺术词汇语言研究

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伯利恒钢铁公司伯恩斯港厂为改进冷轧薄钢板表面质量的炼？…

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国外钢铁钒钛 1996年第2期9卷 103-113,123页

作者： kind.,DH 郭新春伯利恒钢铁公司

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线性反应系统参数估计的实验步骤和数学方法——Ⅰ参数估计方法(英文)

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华东理工大学学报(自然科学版) 1985年第1期 9-16页

作者： E.G.Christoffel,B.kind 西德鲁尔大学

依据线性微分方程系统的通解,可以通过实验和数学方法求取速率常数矩阵K的特征向量和特征值,从而解决了计算速率常数矩阵的问题。本文介绍了三种计算方法,其中两种是在已知组成空间反应轨迹上的几个组成向量来进行计算,而另外一种方法... 详细信息

依据线性微分方程系统的通解,可以通过实验和数学方法求取速率常数矩阵K的特征向量和特征值,从而解决了计算速率常数矩阵的问题。本文介绍了三种计算方法,其中两种是在已知组成空间反应轨迹上的几个组成向量来进行计算,而另外一种方法则按迭代步骤进行。

关键词：数学方法反应系统常数矩阵实验步骤参数估计统计估计

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大别造山带壳幔界面的断错结构和壳内低速体

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中国科学（D辑） 2005年第4期35卷 304-313页

作者：刘启元 Rainer kind 陈九辉 Yuan Xiaohui 李顺成郭飚 Kurt Wylegalla 赖院根中国地震局地质研究所地震动力学国家重点实验室北京100029

2001年4月～2002年3月, 北起河南兰考附近的崔林(34°40′N, 114°49′E), 南到江西大冶附近的大箕铺(30°20′N, 115°03′E), 横跨大别造山带, 布设了总长度约500 km, 由34台宽频带流动地震仪组成的二维地震台阵观测剖面. 台站采用不... 详细信息

2001年4月～2002年3月, 北起河南兰考附近的崔林(34°40′N, 114°49′E), 南到江西大冶附近的大箕铺(30°20′N, 115°03′E), 横跨大别造山带, 布设了总长度约500 km, 由34台宽频带流动地震仪组成的二维地震台阵观测剖面. 台站采用不等间距布设. 在大别造山带范围内, 台站间距为3～8 km, 其他地区为15～20 km. 利用台阵记录的远震P波波形数据和接收函数方法, 获得了横穿大别造山带的接收函数剖面和各台站下方100 km深度范围内地壳上地幔的S波速度结构. 研究结果表明: 大别造山带地壳在垂直山体走向的方向上具有明显的非对称分块结构; 地壳最大厚度为42 km; 壳幔界面具有与地壳分块结构相应的断错结构, 最大断距达到8 km; 在造山带核部, 存在壳内横波低速体; 壳内低速体分为两部分, 分别对应南大别和北大别; 在垂向上两者可能曾有差异运动; 其下方地壳速度具有随深度增加的梯度结构, 上地幔顶部直到70 km深度范围内速度异常偏低, 而其下方70～100 km的深度上有高速异常体.

关键词：大别造山带低速体壳幔 2002年3月 2001年4月界面 S波速度结构地壳上地幔上地幔顶部地震台阵不等间距函数方法波形数据远震P波研究结果接收函数最大厚度差异运动梯度结构地壳速度速度异常地震仪宽频带

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用电子速度过滤法测量高压

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宇航计测技术 1984年第1期 92-95页

作者： Dieter Hans kind 谢直山

本文介绍一种空腔谐振器,可用作电子速度过滤装置。这种装置可以分析、计算加速电压离散谐振值。因此,该仪器可以用来建立不确定度很小的高压定标。实验研究表明,实验值与理论值的一致性很好。电子经过空腔谐振器所产生的五个电流峰值,... 详细信息

本文介绍一种空腔谐振器,可用作电子速度过滤装置。这种装置可以分析、计算加速电压离散谐振值。因此,该仪器可以用来建立不确定度很小的高压定标。实验研究表明,实验值与理论值的一致性很好。电子经过空腔谐振器所产生的五个电流峰值,在40至100KV电压范围内可以进行检测。这五个值表示能计算出加速电压的电子速度过滤器的平衡条件。这些离散电压值的相隔距离是不相等的,所以测量结果是单值性的。为了大大减少不确定度,有必要进一步研究和观察。目的是要研制出一种采用超导铌谐振腔的测量仪器。使用这种量仪,能实现高达100KV的绝对直流电压的定标,其相对不确定度优于±10-5。

关键词：不确定度电子轻子加速电压谐振腔(微波部件) 空腔谐振器测量结果分离设备过滤器电子速度方程方程式电压范围现代米制国际单位制电容装置决标定标基本常数过滤法

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Dimensionality reduction of hyperspectral images of vegetation and crops based on self-organized maps

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Information Processing in Agriculture 2021年第2期8卷 310-327页

作者： david Ruiz Hidalgo Bladimir Bacca Cortés Eduardo Caicedo Bravo Perception and Intelligent Systems Research Group School of Electrical and Electronic EngineeringUniversidad del ValleSantiago de Cali 76001Colombia

Hyperspectral images are multidimensional massive sets of information that have shown a great potential for different kind of applications as urban mapping,environmental management,vegetation and crops supervision and mineral ***,due to its high dimensional nature and the high variability of the spectral information,the dimensionality reduction process is one of the main challenges in processing hyperspectral *** aim of dimensionality reduction is to eliminate redundant information and simplify the subsequent processes of classification and the search of *** this context,several dimensionality reduction methods have been proposed,but most of them are not flexible enough to deal with the particular features of the hyperspectral *** this way,the use of intelligent methods as neural networks and specially an unsupervised approach as self-organized maps,may improve the dimensionality reduction stage and the final classification *** paper proposes an unsupervised method for the dimensionality reduction of hyperspectral images based on Kohonen self-organized maps,which,compared with other traditional methods such as principal component analysis(PCA)and wavelet decomposition,provides better classification *** results provided in this paper use an RBF(radial basis function)*** average,the proposed method provides a 64%dimensionality reduction and an 88.5%classification *** results suggest that the dimensionality reduction algorithm based on self-organized maps is an efficient approach compared with other popular *** is due to the ability of self-organized maps to automatically detect(self-organizing)relationships within the set of input patterns,which provides flexibility to deal with the special features of the hyperspectral images.

关键词： Dimensionality reduction Hyperspectral images Principal component analysis Radial basis function Remote sensing Self-organized maps Wavelet transform

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A NEW TWO-WAY AUTHENTICATION AND PRIVACY MECHANISM FOR WLAN SECURITY

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Journal of Pharmaceutical Analysis 2003年第2期15卷 111-115页

作者：郑庆华 david Pepyne Computer Department of Xi an Jiaotong University

Objective Aiming at lots of vulnerabilities in the Wired Equivalent Privacy (WEP) which threats the authentication and confidentiality in wireless communication, a new kind of mutual authentication and privacy mechanism named MWEP(Modified WEP) is proposed. Methods MWEP is based on pseudo random number generator (PRNG) and asymmetric cryptograph approach, it generates a unique session key like “One Time Password” for each data frame transmission between any two mobile stations. Results Using this session key to encrypt the transmission data, not only can it avoid replay attack, but also provide a good secure virtual channel for the sender and receiver. MWEP can be incorporated into IEEE 802.11. Conclusion It shows that the proposed mechanism is effective and practical after comparison with WEP and simulation.

关键词： wireless LAN security, authentication privacy WEP PRNG session key

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