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Search Results: 1 - 10 of 36862 matches for " Zhao Yunlin "
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YANG YunLin,ZHAO XiaoJian,SU JuanHua,

中国科技期刊研究 , 2007,
Abstract: 讨论了科技论文采用顺序编码制著录参考文献时文献序号在文中的标注位置,分析了不能标注或尽可能不标注文献序号,以及标注位置的择优选择等各种不同情况,并提出了具体建议。
Analysis on the Effect of Shading on the Characteristics of Large-scale on-grid PV System in China  [PDF]
Yunlin Sun, Xiangzhi Li, Ruijiang Hong, Hui Shen
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B042
Abstract: Because of rich solar resource and low land cost, a lot of large-scale ground-based grid-connected PV systems have been built in Northwest China. In this paper, some shading phenomena on a grid-connected PV system inNorthwest Chinaare classified and analyzed. Through the I-V curve test of PV modules, it can be seen that dust influence system performance of the grid-connected PV system. And the experimental results have shown that shading could affect the electrical properties of PV modules. Meanwhile, same shading area on different shading positions could have different impacts on the identical PV module.
Exploring Pragmatic Failure into the Writing of Young EFL Learners: A Critical Analysis
Peter Yunlin Muir,Zongfang Xu
English Language Teaching , 2011, DOI: 10.5539/elt.v4n4p254
Abstract: This present study provides overviews of the phenomenon in EFL writing instruction in basic education in mainland China, which in its natural sense never proceeds among young learners at high school level. Then it investigated 34 students’ short in-class compositions. Beyond many spelling and syntactic errors, their pragmatic failures are therefore categorized into pragmalinguistic and sociopragmatic failures in accordance with Jenny Thomas (1983). It finds that pragmalinguistic failures are as follows: verbose appositions, combination of two subordinate clauses, misunderstandings of word meaning, Chinese construction of sentences, run-on sentences, independent subordinate clauses, the omission of relative pronouns and that sociopragmatic failure, considerably rare, lies in their perception and expression of specific Chinese-based pragmatic conventions. The author argues that the causes of pragmatic failure are their limited language proficiency and L1 pragmatic transfer. Based on the investigation and findings of the study, the author puts forward some tentative solutions to achieve pragmatic appropriateness in writing: (1) Appropriate in-class introduction of target language pragmatic knowledge and culture; (2) The awareness of distinguishing the target language with L1.
Heavy metal pollution in soils and characteristics of heavy metal accumulation of dominant plants in antimony mining area

Ku Wenzhen,Zhao Yunlin,Lei Cunxi,Dong Meng,Dai Meibin,Yi Hecheng,

环境工程学报 , 2012,
Abstract: 通过野外调查采样,分析了冷水江锑矿区4个采样点土壤和优势植物中重金属含量,以及矿区生长的5种优势植物对Sb、As、Cd、Pb、Cu和Zn的的吸收与富集能力及其富集特性。结果表明,矿区土壤中6种重金属元素的平均含量均超出湖南省土壤背景值和全国土壤背景值,土壤受Sb污染最严重,其次是Cd、As的污染。5种优势植物淡竹叶、苎麻、芒草、狗尾草和白背叶体内Sb、As的含量都超过正常范围,具有修复矿区土壤Sb、As污染的潜力。其中苎麻对Sb的富集系数和转运系数均大于1,满足Sb超富集植物的基本特征,可作为生态恢复的先锋植物;芒草对Cd的富集系数和转运系数都大于1,对重金属有较强的耐性,作为重金属污染的修复植物具有较好的应用前景。
Growth responses and phytoremediation potential of Artemisia selengensis to Cd stress
蒌蒿(Artemisia selengensis)对土壤中镉的胁迫反应及修复潜力研究

DONG Meng,ZHAO Yunlin,LEI Cunxi,DAI Meibin,YI Hecheng,KU Wenzhen,

环境科学学报 , 2012,
Abstract: Artemisia selengensis grown in Dongting Lake wetland was recently found as a plant with good capacity in enriching Cd. A pot experiment was conducted to study the biological traits and the Cd accumulation characteristics of Artemisia selengensis to Cd stress during its growth period. The final results showed that the leaves were injured apparently in response to significant decrease of above-ground biomass when Cd concentrations in soil were higher than 40 mg·kg-1. Artemisia selengensis could complete its life cycle at a high Cd concentration (100 mg·kg-1) and showed strong resistence to soil Cd. The bioavailable Cd accounted for 15.3%~37.1% of total soil Cd. There were no significant differences of Cd concentrations in the plants during their different growth phases, but a lower Cd accumulation was observed in stems and leaves at the seedling stage than the other stages because of low biomass. During the adult stage of Artemisia selengensis, Cd accumulation was up to 492~588 mg·kg-1 under the Cd treatment of 40~60 mg·kg-1. These data suggested that Artemisia selengensis was an outstanding species that could be selected as a potential candidate to repair Cd pollution from lake soil.
Attenuation of photosynthetically available radiation (PAR) in Meiliang Bay under different winds and waves

ZHANG Yunlin~,

应用生态学报 , 2005,
Abstract: Based on the successive underwater irradiance measurement in situ from Jul. 12 to 17 in 2003, the attenuation of photosynthetically available radiation (PAR) and euphotic depth in Meiliang Bay were analyzed under different winds and waves. The results showed that the downward PAR attenuation coefficients ranged from 2.63 to 4.7 m(-1), with an average of 3.63 +/- 0.47 x m(-1), and the corresponding euphotic depth ranged from 0.98 to 1.75 m, with an average of 1.29 +/- 0.18 m, which demonstrated that phytoplankton and macrophyte could not grow below 1.5 m due to the lack of adequate solar radiation. The total suspended solids resulted from wind and wave increased the attenuation of light, with the downward attenuation coefficients of PAR being 2.63, 3.72 and 4.37 x m(-1) under small, medium and large wind and wave, respectively. Significant linear correlations were found between transparence, PAR attenuation coefficient, euphotic depth and total suspended solid, especially inorganic suspended solid, while chlorophyll a was the most nonsignificant light attenuator. Multiple stepwise linear regressions showed that inorganic suspended solid was the most important light attenuator dominating the light attenuation in wind-exposed Meiliang Bay.
Analysis of solar radiation variations over Nanjing region in recent 40 years

ZHANG Yunlin,QIN Boqiang,CHEN Weimin,

地理学报 , 2003,
Abstract: The data utilized in this analysis consisted of extraterrestrial radiation, global radiation, diffuse radiation, direct radiation, total cloud cover and relative sunshine. The annual variations and trend were analyzed for monthly mean daily total global, direct, and diffuse radiation on a horizontal surface and for the relations between global, direct, diffuse radiation and relative sunshine, total cloud cover. The climatological calculation equations of global and direct radiation are put forward. The results show that global and direct radiations are characterized by decrease and diffuse radiation by increase. The main causes are due to the increase of concentration of suspended particles and atmospheric turbidities rather than cloud cover variations.
On Intelligence Mechanism and Soft Computing

Su Yunlin,

计算机科学 , 1994,
Abstract: This paper purports to explore the relation between intelligence mechanism and soft computing. It points out that while there is the seeking of precise and optimal solutions in human's intelligence mechanism, there is also the seeking of approximate and suboptimal solutions. This makes it possible to employ the soft computing to the research on intelligence mechanism, furthermore to spur the advance in the research on intelligence mechanism.

Su Yunlin,

软件学报 , 1993,
Abstract: This paper purports to present an assertional proof for Peterson-Fischer 2-mutual exclusion algorithm. According to Nancy A. Lynch of MIT1], this was an open problem. Hence the significance of this paper is to fill the gap.
An approach to the influence of industrial structure on urban ecological environment
Cui Fengjun,Ru Jiang,Xu Yunlin,
Cui Fengjun
,Ru Jiang,Xu Yunlin

环境科学学报(英文版) , 1994,
Abstract: dustrial structure is key link of man's action to ecological environmental system. Its combina-tion type and intensity determine, to a great extent, economic benefit, resources utilization efficiency andstress on environment. So the assessment to the rationality of industrial structure is of great importance. Inpresent paper, the research theories and ways on relationship between industrial structure and ecological en-vironmental systems were put forward. Environmental carrying capacity (ECC) was adopted to describequantitatively the relationship between man's social economic activity and environmental resources. At theend of this paper. analysis was made with Benxi City as an example.
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