检索结果-南通市图书馆

How the iPhone Widens the *** Deficit with China:The Case of the iPhone X

在线全文

学校读者我要写书评

暂无评论

Frontiers of Economics in China-Selected Publications from Chinese Universities 2020年第4期15卷 642-658页

作者： yuqing xing National Graduate Institute for Policy Studies 7-22-1 RoppongiMinato-kuTokyo 106-8677Japan

Through an examination of the case of the iPhone X,this paper demonstrates that Chinese companies involved in the production of the iPhone X have moved up along the global value *** to the bill of materials,those companies contributed 25.4%of the value added of the iPhone *** 45%of the value added of the iPhone X originated in Japan,South Korea,and other *** iPhone trade remains a significant element of the statistical distortion of the China-US bilateral trade *** terms of gross value,the import of one iPhone X results in a USD332.75 trade deficit for the US;measured in terms oLthe value added,however the deficit is a mere USD *** depreciation of the Chinese yuan(CNY)has very limited power to counterbalance the tariffs imposed by the Trump administration because the foreign value added embedded in Chinese exports is 33.9%on *** results show that to counterbalance a 25%tariff,the CNY would have to depreciate by 43.3%against the US dollar on average,and to fully compensate for a 25%tariff burden on the iPhone X,a 400%depreciation of the CNY would be *** the risk of the punitive *** by depreciating the CNY is impossible.

关键词： China US value added global value chains(GVCs) iPhone Chinese yuan(CNY)

Reversible switching of Kondo resonance in a single-molecule junction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2022年第2期15卷 1466-1471页

作者： yuqing xing Hui Chen Bin Hu Yuhan Ye Werner AHofer Hong-Jun Gao Institute of Physics Chinese Academy of Sciences and University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

The control of the Kondo effect is of great interest in single-molecule junction due to its potential applications in spin based ***,we demonstrate that the Kondo effect is reversibly switched on and off in an iron phthalocyanine(FePc)single-molecule junction by using a superconducting Nb *** a scanning tunneling microscope-based Nb-insulator-FePc-Au junction,we achieve a reversible switching between the Kondo dip and inelastic electronic tunneling spectra by simply adjusting the tip-sample distance to tune the tunnel coupling at low *** approaching the tip leads to the picking up of the molecule to the tip apex,which transfers the geometry of the single-molecule junction into a Nb-FePc-insulator-Au *** the molecule forms an effective magnetic impurity embedded into the superconducting ground states of the Nb tip,the out-gap Kondo dip switched to an in-gap Yu-Shiba-Rusinov *** results open up a new route for manipulating the Kondo effect within a single-molecule junction.

关键词： iron phthalocyanine(FePc) scanning tunneling microscope superconducting tip Kondo resonance inelastic electron tunneling Yu-Shiba-Rusinov states

Sulfation of the extracellular polysaccharide from the edible fungus Stropharia rugosoannulata with its antioxidant activity

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 Future Foods 2023年第1期3卷 37-42页

作者： Hui Hao Chun Cui yuqing xing Xuewei Jia Bingjie Ma Wenyi Kang Tianxiao Li Mingqi Gao Chunping Xu China Tobacco Henan Industry Co.Ltd. Zhengzhou 450000China College of Food and Biological Engineering Zhengzhou University of Light IndustryZhengzhou 450000China National R&D Center for Edible Fungus Processing Technology Henan UniversityKaifeng 475004China

An acidic extracellular polysaccharide(EPS)was gained from Stropharia rugosoannulata fermentation broth by the alcohol precipitate *** derivative of EPS(S-EPS)was gained by chlorosulfonic acid-pyridine method and the conditions were as follows:pyridine as the reaction solvent,temperature 80°C,and reaction time 90 *** chemical structure and chain conformation of EPS and S-EPS were characterized by FT-IR,NMR and size exclusion chromatography(SEC)coupled with multi-angle laser light scattering(MALLS)***-IR spectra indicated the sulfated group was linked to the *** EPS mainly consists of mannose,glucose and glucuronic acid,and the glycosidic bond type is mainly(1→4)-linked and(1→6)-linked.C6 and C2 were substituted by sulfate *** EPS was degraded into smaller molecular weight(Mw)polysaccharides with the larger molecular size(Rg)after sulfation and S-EPS has better ***,the sulfated derivative S-EPS was found to have a better scavenging ability on hydroxyl radicals than *** proved that the chemical modification of *** polysaccharides by sulfation effectively enhanced their antioxidant activity.

关键词： Polysaccharides Stropharia rugosoannulata Sulfation Antioxidant activity

Analysis of New Developments and Key Technologies of Autonomous Underwater Vehicle in Marine Survey

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Analysis of New Developments and Key Technologies of Autonom...

2011 3rd International Conference on Environmental Science and Information Application Technology(ESIAT 2011)

作者： Minqiang Tang Zhiqiang Zhang yuqing xing Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sicences key Laboratory of Technology and Application for Safeguarding of Marine Rights and Interests SOA South China Sea Marine Engineering surveying Center SOA Graduate University Chinese Academy of Sciences

The paper illustrates some marine survey AUVs plus their features and typical configurations, and analyzes their key technologies through classification and analysis, which are currently existed or under development. Their composition can be divided into basic modules and functional modules. Basic modules include central processing system, propeller system, power supply system and navigation system etc. Meanwhile, functional modules refer to auxiliary sensor and survey equipment. As for AUV applied in marine survey, designer should pay more consideration to the running state in high velocity flow and strengthen the control of side thrust. The configurations of marine survey AUVs from companies like Kongsberg in Norway, Hydroid in U.S., Bluefin Robotics in U.S. and Hafmynd in Iceland are analyzed and classified. The research and development process of domestic AUV are also be reviewed. As AUV can collect data with highly efficiency and better quality, it will replace traditional means of surface vessels with towed systems for its portability. Easy use of AUV can significantly reduce fuel consumption of ships, which will be widely used in marine survey in the future as a cost-effective method.

关键词： Marine survey AUV new development key technologies analysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

全球价值链与遗漏的美国出口

世界经济文汇 2018年第5期 1-8页

作者：邢予青日本国立政策研究大学院大学

越来越多的美国跨国公司将自己的产品外包给国外公司生产。在这种生产模式下,这些跨国公司的主要收益,来自其拥有的核心技术和品牌的知识产权。然而,传统贸易统计是根据企业向海关申报的产品价值进行统计的。一般来说,产品中蕴含的知识... 详细信息

越来越多的美国跨国公司将自己的产品外包给国外公司生产。在这种生产模式下,这些跨国公司的主要收益,来自其拥有的核心技术和品牌的知识产权。然而,传统贸易统计是根据企业向海关申报的产品价值进行统计的。一般来说,产品中蕴含的知识产权增加值不会计入任何一国的进口或者出口。因此,现行的贸易统计不仅大幅低估了美国的出口,也夸大了其贸易赤字的程度。本文以美国最大的消费产品企业——苹果公司为例,来说明在全球价值链为主导的时代,传统的贸易统计并不能准确估算美国真实的出口能力。根据本文的分析,如果苹果公司通过其产品向外国消费者出售的知识产权增加值,被计入美国的出口,2015年美国出口总额将上升3. 4%,贸易赤字将下降7. 0%。从双边贸易的角度看,包含知识产权增加值的统计方法,将使得美国在2015年对中国和日本的出口分别上升16. 6%和8. 6%,并把美国与两国的贸易逆差分别降低5. 2%和7. 8%。

关键词：美国出口苹果公司

基于多层局部推理的汉语篇章关系及主次联合识别

在线全文

学校读者我要写书评

暂无评论

中文信息学报 2022年第7期36卷 42-49页

作者：邢雨青孔芳苏州大学计算机科学与技术学院江苏苏州215006

篇章关系识别是篇章分析的核心组成部分。汉语中,缺少显式连接词的隐式篇章关系占比很高,篇章关系识别更具挑战性。该文给出了一个基于多层局部推理的汉语篇章关系及主次联合识别方法。该方法借助双向LSTM和多头自注意力机制进行篇章关... 详细信息

篇章关系识别是篇章分析的核心组成部分。汉语中,缺少显式连接词的隐式篇章关系占比很高,篇章关系识别更具挑战性。该文给出了一个基于多层局部推理的汉语篇章关系及主次联合识别方法。该方法借助双向LSTM和多头自注意力机制进行篇章关系对应论元的表征;进一步借助软对齐方式获取论元间局部语义的推理权重,形成论元间交互语义信息的表征;再将两类信息结合进行篇章关系的局部推理,并通过堆叠多层局部推理部件构建了汉语篇章关系及主次联合识别框架,在CDTB语料库上的关系识别F_(1)值达到了67.0%。该文进一步将该联合识别模块嵌入一个基于转移的篇章解析器,在自动生成的篇章结构下进行篇章关系及主次的联合分析,形成了完整的汉语篇章解析器。

关键词：篇章分析篇章关系局部推理

The As-surface of an iron-based superconductor CaKFe_(4)As_(4)

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第11期14卷 3921-3925页

作者： Lu Cao Yang Song Ya-Bin Liu Qi Zheng Guangyuan Han Wenyao Liu Meng Li Hui Chen yuqing xing Guang-Han Cao Hong Ding Xiao Lin Shixuan Du Yu-Yang Zhang Geng Li Ziqiang Wang Hong-Jun Gao Institute of Physics Chinese Academy of SciencesBeijing100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing100049China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing100190China Songshan Lake Materials Laboratory Dongguan523808China Department of Physics Zhejiang UniversityHangzhou310027China Department of Physics Boston CollegeChestnut HillMassachusetts02467USA

As a new type of iron-based superconductor, CaKFe_(4)As_(4) has recently been demonstrated to be a promising platform for observing Majorana zero modes (MZMs). The surface of CaKFe_(4)As_(4) plays an important role in realizing the MZM since it hosts superconducting topological surface states. However, due to the complicated crystal structure, the terminal surface of CaKFe_(4)As_(4) has not been determined yet. Here, by using scanning tunneling microscopy/spectroscopy (STM/S), we find that there are two types of surface structure in CaKFe_(4)As_(4). Bias-dependent atomic resolution images show an evolvement from 2–√×2–√ superstructure with respect to the As lattice into 1 × 1 when the tip is brought close to the surface, revealing the sublattice of missing As atoms. Together with the first-principles calculations, we show that the surface As layer has a buckled structure. Our findings provide insight to future surface study of CaKFe_(4)As_(4) as well as other iron-pnictide superconductors.

关键词： CaKFe_(4)As_(4) scanning tunneling microscopy atomic resolution density functional theory

Clinical observation of continuously subcutaneous-pumped octreotide infusion in palliative treatment of malignant bowel obstruction

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Chinese-German Journal of Clinical Oncology 2011年第1期10卷 31-34页

作者： Dongfeng Yin Yin Zhu yuqing xing Hong Gao Yuzhen Pan Lin Pan Guangyi Tang Xiangrong xing Lijiang Zhou Department of Internal Oncology Affiliated Hospital of Liaoning University of Traditional ChineseMedicine Shenyang 110032 China

Objective： The aim of the study was to observe the effectiveness of continuously subcutaneous-pumped octreotide infusion in palliative treatment of malignant bowel obstruction （MBO）. Methods： Clinical data were retrospectively analyzed in 26 carcinoma patients complicated with MBO, in the Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, China, from March 2007 to April 2009. All 26 carcinoma patients with MBO were divided into no groups： the controlling group （CG, routine therapy, 15 patients） and the octreotide group （OG, 11 patients）. The octreotide group received routine therapy combined with octreotide （0.3 mg/d） by 24 hours continuously subcutaneous octreotide infusion. The changes of curative effectiveness related to symptoms, the times of recovering exsufflation and defecation, the average drain of gastrointestinal drainage tube, the duration of gastrointestinal drainage tube and the rate of extubation, were observed and compared between the two groups. Results： After treatment, remarkable changing rates of MBO related symptoms were 81.8% （9/11） in OG, and 46.7% （7/15） in CG （P 〈 0.05）. The 78% of SG and 30% of CG recovered the exsufflation and defecation, and the mean times they needed were 3.2 d and 5.8 d, respectively （P 〈 0.05）. The durations of gastrointestinal drainage tube of OG and CG were （5 ± 1.2） d and （10 ±2.3） d, respectively, and the rates of extubation were 54.5% and 20%, respectively. The improvement rate in the octreotide group was better than that in the controlling group and the difference was significant （72.7% and 26.7%, P 〈 0.05）. Conclusion; The administration of octreotide in combination with routine treatment can be very effective in the treatment of MBO. It can relieve the symptoms of MBO effectively and improve the quality of life of the end-stage patients. It has provided one kind of new treating thought and method for treatment of malignant bowel obstruction.

关键词： malignant bowel obstruction (MBO) octreotide palliative treatment continuously subcutaneous-pumped infusion

在线全文

学校读者我要写书评

暂无评论

基于广泛靶向代谢组学的冷藏冬枣成分分析

中国食品学报 2023年第4期23卷 324-333页

作者：石飞邢玉青李志刚邓冰王愈山西农业大学食品科学与工程学院山西晋中030801

为研究采后冬枣冷藏期间代谢物的变化,采用超高效液相色谱-串联质谱技术分析采后冬枣冷藏前、后的代谢物质,通过主成分和相关性分析以及正交偏最小二乘判别分析等统计分析,比较冷藏不同时间和未经冷藏冬枣果实中的代谢物差异。结果表明... 详细信息

为研究采后冬枣冷藏期间代谢物的变化,采用超高效液相色谱-串联质谱技术分析采后冬枣冷藏前、后的代谢物质,通过主成分和相关性分析以及正交偏最小二乘判别分析等统计分析,比较冷藏不同时间和未经冷藏冬枣果实中的代谢物差异。结果表明,在冬枣果实中共鉴定到794个13类代谢物,其中冷藏60 d和90 d的冬枣果实中分别筛选出93个和154个差异代谢物,说明冷藏对差异代谢物的数量和含量均有影响,其中对含量影响较大。通过对差异代谢物富集的代谢途径分析,发现冷藏60 d和冷藏90 d的果实中的差异代谢物主要存在于代谢途径、次级代谢物质生物合成途径、亚油酸代谢途径、类黄酮生物合成途径及黄酮和黄酮醇生物合成途径。研究结果为探究冷藏冬枣果实品质劣变机制提供理论依据。

关键词：冷藏冬枣代谢组学差异代谢物代谢途径

同方期刊数据库