检索结果-南通市图书馆

An oceanic eddy statistical comparison using multiple observational data in the Kuroshio Extension region

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2017年第3期36卷 1-7页

作者： ji jinlin dong Changming zhang Biao LIU Yu School of Marine Sciences Nanjing University of Information Science and Technology Nanjing 210044 China jiangsu Engineering Technology Research Center of Marine Environment Detection Nanjing 210044 China Oceanic Modeling and Observation Laboratory Nanjing University of Information Science and Technology Nanjing 210044 China Department of Atmospheric and Oceanic Sciences University of California Los Angeles 90095 USA

Eddy characteristics derived from different data resources are compared： sea surface temperature（SST）, sea surface height anomaly（SSHA） and surface drifter trajectories. The comparison suggests that the eddy statistical characteristics are different using different variables to delineate eddies, but they show the similar trend. Based on the comparison, abnormal eddies with warm（cold） cores but counter-clockwise（clockwise） rotation are found in the Kuroshio Extension region.

关键词： oceanic eddy eddy characteristics Kuroshio Extension region

Pattern design on 3D triangular garment surfaces

在线全文

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第10期8卷 1642-1649页

作者： WANG jin LU Guo-dong LI ji-tuo CHEN Long zhang dong-liang State Key Lab. of CAD ＆ CG Zhejiang University Hangzhou 310027 China Institute of Automation Chinese Academy of Sciences Beijing 100080 China Digital Fashion Ltd. Osaka 5410053 Japan

This paper focuses on a pattern design method for a 3D triangular garment surface. Firstly, some definitions of 3D style lines are proposed for designing the boundaries of patterns as drawing straight lines or splines on the triangular surface. Additionally some commonly used style lines are automatically generated to enhance design efficiency. Secondly, after style lines are preprocessed, a searching method is presented for quickly obtaining the boundaries and patches of a pattern on the 3D trian- gular surface. Finally a new pattern design reuse method is introduced by encoding/decoding the style line information. After style lines are encoded, the pattern design information can be saved in a pattern template and when decoding this template on a new garment surface, it automates the pattern generation for made-to-measure apparel products.

关键词： Pattern design Style lines 3D patch searching Encoding/decoding Design reuse

Toxic effects of acetochlor and methamidophos on earthworm Eisenia fetida in phaiozem, northeast China

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2006年第4期18卷 741-745页

作者： ZHOU Qi-xing zhang Qian-ru LIANG ji-dong Key Laboratory of Terrestrial Ecological Process Institute of Applied Ecology Chinese Academy of Sciences Shenyang 110016 China College of Environmental Sciences and Engineering Nankai University Tianjin 300071 China College of Energy and Power Engineering Xi＇an Jiaotong University Xi＇an 710049 China

Acetochlor and methamidophos are two important agrochemicals which are widely applied to agricultural production in northeast China. The investigation on the earthworm Eisenia fetida as an important type of soil animals exposed to single and binary-combined contamination of acetochlor and methamidophos was thus carried out. The single toxic effect test showed that the two agrochemicals had their toxicity to the earthworms living in phaiozem. Acetochlor had a stronger acute toxic effect on the earthworms than methamidophos. The mortality of the earthworms exposed to individual acetochlor and methamidophos changed with an increase in the exposure time and the exposed concentrations. The LD50 value of acetochlor and methamidophos toxic to the earthworms was 115.6-275,3 and 29.5-228.6 mg/kg, respectively. The weight of the earthworms was a more sensitive index compared to the mortality in indicating toxic effects of acetochlor and methamidophos in phaiozem. When considering both the mortality and the body-weight change, the combined pollution of acetochlor and methamidophos in phaiozem resulted in their synergic toxic effects on the earthworms.

关键词： ecological safety earthworm Eiseniafetida acetochlor methamidophos combined pollution soil ecotoxicology

Improved flexible Li-ion hybrid capacitors： Techniques for superior stability

在线全文

学校读者我要写书评

暂无评论

Nano Research 2017年第12期10卷 4448-4456页

作者： Shengyang dong Hongsen Li Junjun Wang Xiaogang zhang Xiulei ji jiangsu Key Laboratory of Materials and Technology for Energy Conversion College of Material Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Department of Chemistry Oregon State University Corvallis Oregon 97331-4003 USA

Flexible power devices play an increasingly crucial role in emerging flexible electronics. To improve the electrochemical performance of flexible power devices, novel electrode structures and new energy-storage systems should be designed. Herein, a novel flexible Li-ion hybrid capacitor （LIC） is designed based on an anode comprising Li4TisO12 nanoplate arrays coated on carbon textile （LTO/CT） and a cathode comprising a flexible N-doped graphene/carbon-nanotube composite （NGC） film. The LTO/CT anode is fabricated by directly growing Li4TisO12 nano- plates on CT with robust adhesion using a simple one-pot hydrothermal reaction. Considering the volume of a real-device flexible LIC, the NGC//LTO/CT con- figuration delivers high volumetric energy and power densities of 2 mWh·cm-3 and 185 mW·cm-3, respectively. Furthermore, the flexible LIC shows excellent flexibility and electrochemical stability, with extremely small capacity fluctuation under different bending states. This work demonstrates a scalable route to assemble flexible LICs as high-performance power devices.

关键词： flexible devices Li-ion hybrid capacitors Li4TisO^2 nanoplates graphene carbon nanotube

Friction Stir Welding of Al Alloy Thin Plate by Rotational Tool without Pin

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2011年第7期27卷 647-652页

作者： Liguo zhang Shude ji Guohong Luan Chunlin dong Li Fu School of Aerospace Engineering Shenyang Aerospace University Shenyang 110136 China China FSW Center Beijing 100024 China Shenyang Aircraft Design & Research Institute Shenyang 110035 China State Key Laboratory for Manufacturing Systems Engineering Xi an Jiaotong University Xi an 710049 China

For friction stir welding （FSW）, a new idea is put forward in this paper to weld the thin plate of Al alloy by using the rotational tool without pin. The experiments of FSW are carried out by using the tools with inner-concave-flute shoulder, concentric-circles-flute shoulder and three-spiral-flute shoulder, respectively. The experimental results show that the grain size in weld nugget zone attained by the tool with three-spiral-flute shoulder is nearly the same while the grain sizes decrease with the decrease of welding velocity. The displacement of material flow in the heat-mechanical affected zone by the tool with three-spiral-flute shoulder is much larger than that by the tool with inner-concave-flute shoulder or concentric-circles–flute shoulder. The above-mentioned results are verified by numerical simulation. For the tool with three-spiral-flute shoulder, the tensile strength of FSW joint increases with the decrease of welding velocity while the value of tensile strength attained by the welding velocity of 20 mm/min and the rotation speed of 1800 r/min is about 398 MPa, which is 80% more than that of parent mental tensile strength. Those verify that the tool with three-spiral-flute shoulder can be used to join the thin plate of Al alloy.

关键词： Friction stir welding Rotational tool without pin Shoulder shape Plastic flow

Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying Zhu Hesong Wang Anzhi zhang School of Ecology and Nature Conservation Beijing Forestry UniversityBeijingChina Key Laboratory of Regional Climate and Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in East Asia,South Asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast Asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

在线全文

学校读者我要写书评

暂无评论

胆脂瘤型中耳炎的高分辨率CT诊断

实用放射学杂志 2002年第5期18卷 424-426页

作者：樊孟耘杨军乐宁文德董季平张全安西安市第四医院耳鼻咽喉科西安市中心医院影像中心西安交通大学第二医院耳鼻咽喉科陕西西安710001

目的　探讨胆脂瘤型中耳炎的高分辨率CT征象 ,提高对本病诊断的准确性。方法　回顾性研究经手术及病理证实的31例胆脂瘤型中耳炎患者的CT资料。结果　高分辨率CT能清楚地显示起源部位不同和大小不等的中耳胆脂瘤的软组织影填塞征象及其... 详细信息

目的　探讨胆脂瘤型中耳炎的高分辨率CT征象 ,提高对本病诊断的准确性。方法　回顾性研究经手术及病理证实的31例胆脂瘤型中耳炎患者的CT资料。结果　高分辨率CT能清楚地显示起源部位不同和大小不等的中耳胆脂瘤的软组织影填塞征象及其引起的中耳系统细微的骨质破坏征象。手术与CT诊断不同部位胆脂瘤的符合率达 93 .5 %～ 1 0 0 %。结论　高分辨率CT对于胆脂瘤型中耳炎的准确诊断具有很高的价值。

关键词：中耳炎胆脂瘤高分辨率CT

Impact of lymph node micrometastasis on gastric carcinoma prognosis:A meta-analysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第5期21卷 1628-1635页

作者： Yong-ji Zeng Chun-dong zhang dong-Qiu Dai Department of Gastrointestinal Surgery the Fourth Affiliated Hospital of China Medical University

AIM:To investigate the prognostic significance of lymph node micrometastasis(LNMM) in patients with gastric ***:Two reviewers independently searchedelectronic databases including Pub Med,EMBASE,the Cochrane Database of Systematic Reviews,the Cochrane Controlled Studies Register,and the China National Knowledge Infrastructure electronic database between January 1996 and January *** literature retrieval and data extraction were performed to extract relevant *** analysis was conducted using Rev Man 5.2.4 software,and relative risks(RRs) for patient death in five years and recurrence were calculated.A fixed- or random-effects model was selected to pool and a forest plot was used to display ***:Twelve cohort studies containing a total of 1684 patients were *** positivity was worse than LNMM negativity with regards to the number of patients who died in five *** effects of LNMM positivity in patients with gastric cancer of different T-stages remain *** in patients with gastric carcinoma was also associated with a higher recurrence *** regards to the number of patients who died in five years,Asian patients were worse than European and Australian ***:We recommend that LNMM should not be used as a gold standard for prognosis evaluation in patients with gastric cancer in clinical settings until more high quality trials are available.

关键词： Gastric carcinoma Survival Lymph node micrometasta

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

灰质异位症的CT诊断

实用放射学杂志 2003年第9期19卷 785-787页

作者：刘勃董季平张增俊江菊芬王玉华西安市儿童医院CT室西安市中心医院、市医学影像中心西安市儿童医院神经内科陕西西安710003

目的　分析灰质异位症的CT表现和分型。方法　回顾性分析 2 6例灰质异位症患儿的临床及CT资料 ,其中男 11例 ,女15例 ,年龄 2d～ 9岁 ,平均 2 .6岁。结果　（1）室管膜下型 14例。合并脑膜膨出 5例 ,Dandy -Walker畸形 1例 ,枕大池蛛... 详细信息

目的　分析灰质异位症的CT表现和分型。方法　回顾性分析 2 6例灰质异位症患儿的临床及CT资料 ,其中男 11例 ,女15例 ,年龄 2d～ 9岁 ,平均 2 .6岁。结果　（1）室管膜下型 14例。合并脑膜膨出 5例 ,Dandy -Walker畸形 1例 ,枕大池蛛网膜囊肿1例。（2 ）皮质下型 7例 ,4例合并胼胝体发育不全。（3 ）带状型 5例。结论　CT不仅能显示室管膜下型、皮质下型、带状型灰质异位的形态学表现 ,而且能够发现各种合并畸形

关键词：脑灰质异位症体层摄影,X线计算机