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Search Results: 1 - 10 of 69122 matches for " Wu Qing-Long "
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STUDIES ON BIOCHARACTERS OF MOUTH AND FOOD HABITS OF THE LARVAL OF MICROPTERUS SALMONOIDES
加州鲈鱼仔幼鱼口器结构与食性的研究

Wu Qing-Long,
吴庆龙

生态学报 , 1993,
Abstract: 加州鲈鱼,又名大嘴黑鲈(Micropterus salmonoides)。隶属于鲈形目(Perciformes),太阳鱼科(Centrarchidae)。原产于美国密西西比河水系,现广泛分布于欧美等地。它为肉食性凶猛鱼类,肉质鲜美;且具有生长快、耐低温、抗病力强和易捕捞等优点。1983年我国深圳首次引进此种鱼类,此后在各地逐步推广养殖。有关加州鲈鱼的生长、生态及生理等方面的研究,国内外已有不少报道,但有关仔幼鱼口器结构及食性方面的研究不多,仅见Parmley,D.等研究该属佛罗里达黑鲈仔幼鱼食性的报道。为更好地促进其苗种培育,作者于1991年4—5月进行了有关的观察,现报道如下。
cyclo-Tetrakis{μ-N′-[(8-oxidoquinolin-7-yl)methylidene]isonicotinohydrazidato}tetrazinc tetrahydrate
Xiang-Wen Wu,Qing-Long Li,Jian-Ping Ma,Yu-Bin Dong
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812018995
Abstract: In the title compound, [Zn4(C16H10N4O2)4]·4H2O, the N′-[(8-oxidoquinolin-7-yl)methylidene]isonicotinohydrazidate (L2 ) ligand binds to the metal ions, forming stable five- and six-membered chelate rings, leaving the pyridyl groups free. The compound is a tetranuclear ZnII complex centered about a fourfold roto-inversion axis, with the ligand coordinating in the doubly deprotonated form. The ZnII atom has a distorted square-pyramidal geometry being coordinated by one N and two O-atom donors from the doubly deprotonated L2 ligand, and by one N atom and one O-atom donor from a symmetry-related L2 ligand. In the crystal, four symmetry-related lattice water molecules, centred about a fourfold roto-inversion axis, form a cyclic tetramer through O—H...O hydrogen bonds. These tetramers connect to the complex molecules through O—H...N hydrogen bonds, forming a chain propagating along [100]. Neighbouring molecules are linked by π–π interactions [centroid–centroid distance = 3.660 (2) ] involving the quinolidine rings.
Interspinous Spacer versus Traditional Decompressive Surgery for Lumbar Spinal Stenosis: A Systematic Review and Meta-Analysis
Ai-Min Wu, Yong Zhou, Qing-Long Li, Xin-Lei Wu, Yong-Long Jin, Peng Luo, Yong-Long Chi, Xiang-Yang Wang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0097142
Abstract: Background Dynamic interspinous spacers, such as X-stop, Coflex, DIAM, and Aperius, are widely used for the treatment of lumbar spinal stenosis. However, controversy remains as to whether dynamic interspinous spacer use is superior to traditional decompressive surgery. Methods Medline, Embase, Cochrane Library, and the Cochrane Controlled Trials Register were searched during August 2013. A track search was performed on February 27, 2014. Study was included in this review if it was: (1) a randomized controlled trial (RCT) or non-randomized prospective comparison study, (2) comparing the clinical outcomes for interspinous spacer use versus traditional decompressive surgery, (3) in a minimum of 30 patients, (4) with a follow-up duration of at least 12 months. Results Two RCTs and three non-randomized prospective studies were included, with 204 patients in the interspinous spacer (IS) group and 217 patients in the traditional decompressive surgery (TDS) group. Pooled analysis showed no significant difference between the IS and TDS groups for low back pain (WMD: 1.2; 95% CI: ?10.12, 12.53; P = 0.03; I2 = 66%), leg pain (WMD: 7.12; 95% CI: ?3.88, 18.12; P = 0.02; I2 = 70%), ODI (WMD: 6.88; 95% CI: ?14.92, 28.68; P = 0.03; I2 = 79%), RDQ (WMD: ?1.30, 95% CI: ?3.07, 0.47; P = 0.00; I2 = 0%), or complications (RR: 1.39; 95% CI: 0.61, 3.14; P = 0.23; I2 = 28%). The TDS group had a significantly lower incidence of reoperation (RR: 3.34; 95% CI: 1.77, 6.31; P = 0.60; I2 = 0%). Conclusion Although patients may obtain some benefits from interspinous spacers implanted through a minimally invasive technique, interspinous spacer use is associated with a higher incidence of reoperation and higher cost. The indications, risks, and benefits of using an interspinous process device should be carefully considered before surgery.
Impacts of regime shift between phytoplankton and macrophyte on the microbial community structure and its carbon cycling in lakes
草藻型稳态转换对湖泊微生物结构及其碳循环功能的影响

WU Qing-Long,XING Peng,LI Hua-Bing,ZENG Jin,
吴庆龙
,邢鹏,李化炳,曾巾

微生物学通报 , 2013,
Abstract: Lake is one of the major ecosystems on the earth. Lake ecosystems play an important role in the nutrient cycling in the regional as well as in the global scale due its connection with different interfaces and its functioning as a junction in the catchment. Microbes are key biological components of the lake ecosystems and are the major forces driving the cycling of nutrients including the carbon. Lake ecosystems particularly in shallow lakes always possess two alternative stable states, a turbid state dominated by phytoplankton and a clear state dominated by submersed macrophyte. Such a change of alternative states is always related to the loading of nutrients including phosphorus and nitrogen as a result of human activities and global change. The shift of alternative states has strong impacts on the ecosystem structure and its function. In this review, we focused on responses of microbial community structure under the regime shift between clear state and turbid state, and subsequently the change of microbial carbon cycling driven by the microbes in lakes. Based on these analyses, we further point out the major research priorities in this direction in the future. We hope such a review will be helpful for a better understanding on the carbon cycling and its mechanisms driven by microbes in lakes.
Distribution and Diversity of Legionella spp.in Lake Taihu in the Winter
太湖冬季军团菌(Legionella spp.)的分布和多样性

WANG N,XING Peng,WU Qing-long,YU Duo-wei,
王娜
,邢鹏,吴庆龙,余多慰

环境科学 , 2011,
Abstract: The Legionella spp. are ubiquitous in aquatic environment and could cause certain risks on human health. In order to investigate the distribution and diversity of Legionella spp. in Lake Taihu during winter time, water samples were collected from 32 sites of the whole lake in February 2010. The presence of Legionella spp. was screened by nested-PCR and their phylogenetic diversity was determined by denaturing gradient gel electrophorese(DGGE) and sequencing analysis of excised DGGE bands. The Legionella spp. was detected from 21 out of 32 sites in particle-associated bacterial samples and 11 out of 32 sites in free-living bacterial samples, which accounted for 65.63% and 34.38% of each type of bacteria, respectively. In total, 40 and 36 unique bands were identified among those particle-associated and free-living bacterial DGGE profiles, respectively. Community characteristic indices of different euthrophic areas showed that the diversity of Legionella spp. in mild eutrophic areas was higher than that in the moderate eutrophic areas. In total, thirty-four DGGE bands were excised and sequenced, which could be classified into 12 OTUs by 97% similarity. Among all the sequences, three showed a high similarity with two pathogenic Legionella species Legionella feeleii and Legionella longbeachae. This revealed potential healthy risks to the people lived around the Lake Taihu.
Ant Colony Algorithm Based on Entropy for Customer Segmentation
基于信息熵的蚁群聚类算法在客户细分中的应用①

WU Chun-Xu,LIU Yan-Ze,GOU Qing-Long,
吴春旭
,刘艳泽,苟清龙

计算机系统应用 , 2010,
Abstract: The ant-based clustering algorithm needs to set several parameters and cluster for a long time.The ant- based clustering algorithm based on entropy, which uses entropy to amend the ants picking and dropping rules, can reduce the number of parameters and shorten the time of clustering. This paper intends to apply it to the customer segmentation, and compares the segmentation results with the traditional ant-based clustering algorithm. The experiment shows that the ant-based clustering algorithm based on entropy can accelerate customer segmentation.
Application of Self Organization Map to Classification of the Telecommunication Company
自组织映射聚类算法在电信客户细分中的应用①

WU Chun-Xu,BAO Man-Yuan,GOU Qing-Long,
吴春旭
,鲍满园,苟清龙

计算机系统应用 , 2010,
Abstract: This paper applies the SOM neural network to the customer segmentation of the telecommunication company, and compares the results of the K-means clustering algorithm and the SOM. The experiment indicates that the SOM is effective to classificate and the cluster effect is better when the data assemble is large, but it takes the training time. At the same time, it analyses the algorithm complexity and the errors of the two algorithms.
AN APPROACH TO EXPLOITATION OF FISHERY RESOURCES OF LUOMA LAKE
骆马湖渔业资源利用探讨

Wu Qing-long,CHEN Kai-ning,BIAN Wen-ji,
吴庆龙
,陈开宁,边文冀

资源科学 , 1999,
Abstract: Luoma Lake is a typical artificially controlled lake in north Jiangsu province.This paper elaborates the functions and the features of the lake's fishery resources and eco environment.Detailed analysis to the existing problems resulting from resources exploitation is given.Based upon which,suggestions and measures for rational fishery resources exploitation and protection are raised.
Preparation and Electrochemical Capacitance of α-Ni(OH)2 Synthesized by Microwave-assisted Hydrothermal Method
XIAN Qing-Long, LI Juan
无机材料学报 , 2010, DOI: 10.3724/sp.j.1077.2010.01268
Abstract: Ni(OH)2 particles were successfully prepared with Ni(NO3)2·6H2O as the raw material and CO(NH2)2 as the precipitation agent by microwave-assisted hydrothermal method. The obtained Ni(OH)2 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and electrochemical measurements. XRD results showed that the as-prepared Ni(OH)2 particles had the typical α-phase. The SEM images revealed that the synthesized α-Ni(OH)2 particles were well dispersed and ball-flower like with diameters of 0.5-3 μm which consisted of the aggregated flakes. Electrochemical properties were studied by cyclic voltammograms (CV) and galvanostatic charge-discharge tests in 6 mol/L KOH electrolyte. All the tests showed that the reactants ratio affected the morphologies and the electrochemical capacitance of the materials. When the molar ratio of the CO(NH2)2 to Ni(NO3)2·6H2O was 3:1, the obtained α-Ni(OH)2 had the maximal initial special capacity; when the molar ratio was 2:1, the α-Ni(OH)2 had the best cycle storage performance.
Benthic macroinvertebrate communities in Dianchi lake Yunnan and assessment of its water
滇池底栖无脊椎动物群落结构及水质评价

WANG Li-Zhen,LIU Yong-Ding,CHEN Liang,XIAO Bang-Ding,LIU Jian-Tong,WU Qing-Long,
王丽珍
,刘永定,陈亮,肖邦定,刘剑彤,吴庆龙

水生生物学报 , 2007,
Abstract: 滇池位于云南省昆明市西南郊,海拔1885m的高原面上,受纳盘龙江、宝象河等21条入湖水源,湖水出口南流转北注入金沙江。滇池南北长39.0km^2,东西最宽12.5km^2,最窄2.44km^2,湖岸线151.2km^2,面积为330.0km^2,属于高原构造型亚热带石灰岩富营养型湖。
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