检索结果-南通市图书馆

Perceived and Measured Levels of Environmental Pollution:Interdisciplinary Research in the Subarctic Lowlands of Northeast European Russia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

AMBIO－人类环境杂志 2006年第5期35卷 220-228页

作者： Tony R. Walker Joachim Otto Habeck Timo P. Karjalalnen Tarmo Virtanen Nadia Solovieva Viv Jones peter kuhry Vasily, I. Ponomarev Kari Mikkola Ari Nikula Elena Patova peter D. Crittenden Scott D. Young Tim Ingold 刘媛（译）加拿大哈曼法克斯市戴尔豪斯（Dalhousie）大学德国马克斯普朗克社会人类学研究所（哈雷／萨勒）西伯利亚研究中心芬兰奥卢大学教育学系赫尔辛基大学生物与环境学系环境生物学伦敦大学环境变化研究中心斯德哥尔摩大学瑟克特夫卡尔科米科研中心生物学研究所罗瓦涅米芬兰森林研究所罗瓦涅米研究站谱丁汉大学生物学学院诺丁汉大学生物科学学院阿伯丁大学人类学系不详

本文对地处俄罗斯欧洲东北部的乌萨盆地开展跨学科野外研究。将当地居民对环境问题的感知与利用化学和遥感图像技术分析环境污染及其影响的研究成果进行比较。通过对积雪、表土和地衣的化学测定，以及遥感技术和对湖水和沉积物的分析，... 详细信息

本文对地处俄罗斯欧洲东北部的乌萨盆地开展跨学科野外研究。将当地居民对环境问题的感知与利用化学和遥感图像技术分析环境污染及其影响的研究成果进行比较。通过对积雪、表土和地衣的化学测定，以及遥感技术和对湖水和沉积物的分析，表明20世纪30年代以来大规模的煤矿开采是导致英塔（Inta）和沃尔库塔（Vorkuta）地区环境污染的主要原因。沃尔库塔及其周边地区遭受了最严重的影响，湖水与表土金属沉积、碱化的现象明显，陆生地衣（驯鹿地衣）的金属元素与阳离子含量升高，植物群落也出现变化。虽然近年来该地区的煤矿产业出现襄退，但附近乌中斯克（Usinsk）石油天然气工业的发展极为迅猛。1994年鸟申斯克原油大量泄漏事件发生之后，当地居民的环保意识逐渐增强，与认为大气污染是主要环境威胁因素的沃尔库塔居民相比，对环境污染的认知与关注程度较高。研究表明，在沃尔库塔2540km的范围内，向空气中排放的有害气体和局部沉积的污染物主要来自于热电厂、煤矿和水泥厂的煤炭燃烧。沃尔库塔居民通过直接观察和亲身体验来评价大气污染问题，例如发现积雪变色，呼吸系统出现问题，这些感知过程是不易用科学知识来形成的。

关键词：环境污染东北部俄罗斯感知欧洲石油天然气工业科研低地

On some aspects of minimum redundancy maximum relevance feature selection

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第1期63卷 89-103页

作者： peter BUGATA peter DROTAR Intelligent Information Systems Lab Technical University of Kosice

The feature selection is an important challenge in many areas of machine learning because it plays a crucial role in the interpretations of machine-driven decisions. There are various approaches to the feature selection problem and methods based on the information theory comprise an important ***, the minimum redundancy maximum relevance(m RMR) feature selection is undoubtedly the most popular one with widespread application. In this paper, we prove in contrast to an existing finding that the m RMR is not equivalent to Max-Dependency criterion for first-order incremental feature selection. We present another form of equivalence leading to a generalization of m RMR feature selection. Additionally,we compare several feature selection methods based on m RMR, Max-Dependency, and feature ranking,employing different measures of dependency. The results on high-dimensional real-world datasets show that the distance correlation is the suitable measure for dependency-based feature selection methods. The results also indicate that the Max-Dependency incremental algorithm combined with distance correlation appears to be a promising feature selection approach.

关键词： big data information theory feature selection dimensionality reduction minimum redundancy maximum relevance m RMR

Translation and Ideology in the Integration of National Literature into World Literature: A Dialogue with Professor peter Hajdu

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Language and Semiotic Studies 2018年第3期4卷 117-130页

作者： Xiangchun Meng peter Hajdu Soochow University China Hungarian Academy of Sciences Hungary

In their dialogue, peter Hajdu and Meng Xiangchun focus on the integration of national literature into world literature and the roles of translation and ideology in the process. peter Hajdu＇s major ideas include： 1） the selection of a foreign piece of literature mostly depends on the target culture＇s demands, of which the reception of Petbfi Soindor＇s ＂Liberty and Love＂ is a good example; 2） it is usual that smaller literary communities translate from another smaller community＇s literature what already had a success in a major market. Peripheries do not communicate directly, but via a center, and this practice also reinforces the privileged position of the center; 3） the hermeneutic circle may help us understand domestication and foreignization in translation. We understand something strange though the familiar and complete strangeness cannot be understood. Therefore it is theoretically possible that making something more familiar helps one understand its otherness; 4） Readers of translatedcontemporary Chinese literature tend to be particularly interested in the representation of social reality and political/ideological issues; and 5） Mo Yan＇s works travel well because they also make use of various Western literary traditions. Meng Xiangchun puts forward a theory that he tentatively terms ＂the theory of translation dynamics＂ or ＂translation interactology＂ and it will focus on how the numerous factors and considerations in translation act on one another within the target/source language and across languages. Within the framework of translation dynamics, he offers a descriptive parallel comparative 7W approach to integrated translation studies by juxtaposing the 7Ws of the original and target texts and identifying/decoding the nexus among these Ws vertically （of both the original text and the target text） and horizontally （within the same text）, the 7Ws referring to ＂in what context for what who says what to whom in what way with what effect and feedback＂.

关键词： national literature world literature translation ideology translation dynamics

Methyl-β-cyclodextrin enhanced biodegradation of polycyclic aromatic hydrocarbons and associated microbial activity in contaminated soil

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2012年第5期24卷 926-933页

作者： peter Christie Agri-Environment Branch Agri-Food and Biosciences Institute Newforge Lane Belfast BT9 5PX United Kingdom

The contamination of soils by polycyclic aromatic hydrocarbons （PAHs） is a widespread environmental problem and the remediation of PAHs from these areas has been a major concern. The effectiveness of many in situ bioremediation systems may be constrained by low contaminant bioavailability due to limited aqueous solubility or a large magnitude of sorption. The objective of this research was to evaluate the effect of methyl-β-cyclodextrin （MCD） on bioaugmentation by Paracoccus sp. strain HPD-2 of an aged PAH-contaminated soil. When 10% （W/W） MCD amendment was combined with bioaugmentation by the PAH-degrading bacterium Paracoccus sp. strain HPD-2, the percentage degradation of total PAHs was significantly enhanced up to 34.8%. Higher counts of culturable PAH- degrading bacteria and higher soil dehydrogenase and soil polyphenol oxidase activities were observed in 10% （W/W） MCD-assisted bioaugmentation soil. This MCD-assisted bioaugmentation strategy showed significant increases （p 〈 0.05） in the average well color development （AWCD） obtained by the BIOLOG Eco plate assay, Shannon-Weaver index （H） and Simpson index （λ） compared with the controls, implying that this strategy at least partially restored the microbiological functioning of the PAH-contaminated soil. The results suggest that MCD-aided bioaugmentation by Paracoccus sp. strain HPD-2 may be a promising practical bioremediation strategy for aged PAH-contaminated soils.

关键词： polycyclic aromatic hydrocarbons methyl-β-cyclodextrin biodegradation Paracoccus sp. strain HPD-2 microbial activity

Extraction of methane hydrate energy by carbon dioxide injection-key challenges and a paradigm shift

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2019年第9期27卷 2044-2048页

作者： peter Englezos Department of Chemical and Biological Engineering The University of British Columbia

Significant effort including field work has been devoted to develop a natural gas extraction technology from natural gas hydrate reservoirs through the injection of carbon dioxide. Natural gas hydrate is practically methane hydrate. The hypothesis is that carbon dioxide will be stored as hydrate owing to its favorable stability conditions compared to methane hydrate. Although the dynamics of the CO2/CH4 exchange process are not entirely understood it is established that the exchange process is feasible. The extent is limited but even if the CH4 recovery is optimized there is a need for a CH4/CO2 separation plant to enable a complete cyclic sequence of CO2 capture, injection and CH4 recovery. In this paper we propose an alternative paradigm to the Inject(CO2)/Exchange with(CH4)/Recover(CH4) one namely Recover(CH4) first and then Inject(CO2) for Storage.

关键词： Carbon dioxide hydrate Methane hydrate Carbon storage Carbon sequestration Energy Paradigm shift

An Interview with peter Deadman—Acupuncture Pioneer and Founder of The Journal of Chinese Medicine

在线全文

学校读者我要写书评

暂无评论

Chinese Medicine and Culture 2024年第1期7卷 19-28页

作者： Ioannis Solos Charles Buck peter Deadman Saint George Clinic and Research Institute Scottsdale 85251the United States of America Northern College of Acupuncture Micklegate YO16LJthe United Kingdom British Acupuncture Council London W129HQthe United Kingdom The Register of Chinese Herbal Medicine London WC1N 3GSthe United Kingdom

This interview was conducted on August 21st, 2022 by Charles Buck and Ioannis Solos. peter Deadman has worked in the field of health promotion for 50 years. He co-founded Infinity Foods(an organic and natural foods workers co-op) in 1971, followed by the Brighton Natural Health Centre-a charity dedicated to teaching ways to improve personal, community and planetary health and wellbeing. He qualified as an acupuncturist in 1978 and in Chinese herbal medicine in 1990. He founded The Journal of Chinese Medicine(UK) in 1979(Fig. 1), and co-authored A Manual of Acupuncture(published in 1998). He is the author of Live Well Live Long: Teachings from the Chinese Nourishment of Life Tradition. He has taught Chinese medicine and health promotion internationally for decades and is a dedicated practitioner and teacher of Qi Gong(气功).

关键词： Acupuncture Medicine herbal

Seasonal changes in group size and composition of Arabian sand gazelle Gazella subgutturosa marica Thomas, 1897 during a period of drought in central western Saudi Arabia

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2011年第1期57卷 36-42页

作者： peter Low CUNNINGHAM King Khalid Wildlife Research Centre Thumamah E O. Box 61681 Riyadh Kingdom of Saudi Arabia Zoological Society of London Conservation Programmes Regent's Park London NW1 4RY United Kingdom

Group size variations of the Arabian sand gazelle Gazella subgutturosa marica were studied during a period of drought at the Mahazat as-Sayd Protected Area in central western Saudi Arabia. Significant differences in median group sizes were observed between all seasons except summer. Single animals were observed mainly during summer while group sizes ex- ceeding 10 individuals were observed mainly during winter. Solitary male and female groups were typically observed during winter and mixed groups mainly during the autumn rutting period. Most mixed groups were two to four times larger during winter than summer. The adult sex ratio （male： female） for all seasons combined was in parity and highest during autumn （1：1.23）, probably as a result of prolonged drought conditions. The variability in group structure related to environmental conditions may be one factor permitting G. s. marica to adapt to hyper-arid habitats and climatic regimes in central western Saudi Arabia. The value of continuous monitoring of the gazelle population is emphasised for this drought prone region

关键词： Group variations Seasonality Sex ratio Desert ungulate Mahazat as-Sayd Protected Area

Optimization of residence time distribution in RCDG and an assessment of its applicability in continuous manufacturing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Particuology 2021年第3期19卷 43-49页

作者： Annika Wilms peter Kleinebudde Heinrich Heine University Düsseldorf Institute of Pharmaceutics and BiopharmaceuticsUniversitätsstraße 140225 DüsseldorfGermany INVITE GmbH Drug Delivery Innovation Center(DDIC)Chempark Building W3251368 LeverkusenGermany

Knowledge of residence time is a critical aspect in developing control and material diversion strategies for continuous manufacturing processes in pharmaceutical *** granulation is a promising continuous granulation technique as it is fast and *** this study,a step-change method to determine residence time in roll compaction/dry granulation is *** factors roll speed and rotational speed of the impeller in the powder inlet unit of the compactor were evaluated using a central composite circumscribed statistical design of experiments in order to optimize the residence *** fill volume in the compactor was varied *** was found that high roll speed,low rotational speed of the impeller and low fill volume in the compactor are beneficial to generate fast transition through the *** impact of roll speed increase was *** can be concluded that despite fast residence time in the process,high roll speed and its subsequent high material throughput can generate a large amount of material that has to be discarded if material diversion is required.

关键词： Roll compaction/dry granulation Residence time distribution Continuous manufacturing Digital image analysis Response surface optimization

Experimental investigation on slip conditions during thread rolling with flat dies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Friction 2024年第1期12卷 136-143页

作者： Stefan VOLZ peter GROCHE Institute for Production Engineering and Forming Machines Technical University DarmstadtOtto-Berndt Straße 2Darmstadt 64287Germany

The process design of flat die rolling operations can be a tedious and costly process due to the challenges posed by small process *** this work,an effort is made to closely investigate and understand the process limits caused by excessive slippage of the *** measurements are carried out to capture the characteristics of excessive slippage and the influence of the stroke rate and the tribological system on this process *** differences in slippage were observed,depending on the tribological *** systems with polymer based lubricants showed excessive slippage at low stroke rates,systems using oil or no lubricant endured higher stroke rates before process limits were *** optical measurements revealed three major forms of slippage:successful rolling without slippage,failure due to excessive slippage at process start,and failure due to excessive slippage at around one workpiece rotation.

关键词： rolling incremental forming thread rolling slippage profile rolling