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Constructions of optimal variable-weight OOCs via quadratic residues

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Frontiers of Mathematics in China 2013年第4期8卷 869-890页

作者： yah liu Dianhua WU Department of Mathematics Guangxi Normal University Guilin 541004 China

Variable-weight optical orthogonal code （OOC） was introduced by G. C. Yang [IEEE Trans. Commun., 1996, 44： 47-55] for multimedia optical CDMA systems with multiple quality of service （QoS） requirements. In this p... 详细信息

关键词： Cyclic packing optical orthogonal code (OOC) quadratic residue relative difference family variable-weight OOC

Learning Better Word Embedding by Asymmetric Low-Rank Projection of Knowledge Graph

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Journal of Computer Science & Technology 2016年第3期31卷 624-634页

作者： Fei Tian Bin Gao En-Hong Chen Tie-yah liu School of Computer Science and Technology University of Science and Technology of China Hefei 230027 China Microsoft Research Asia Beijing 100080 China

Word embedding, which refers to low-dimensional dense vector representations of natural words, has demon- strated its power in many natural language processing tasks. However, it may suffer from the inaccurate and incomplete information contained in the free text corpus as training data. To tackle this challenge, there have been quite a few studies that leverage knowledge graphs as an additional information source to improve the quality of word embedding. Although these studies have achieved certain success, they have neglected some important facts about knowledge graphs： 1） many relationships in knowledge graphs are many-to-one, one-to-many or even many-to-many, rather than simply one-to-one; 2） most head entities and tail entities in knowledge graphs come from very different semantic spaces. To address these issues, in this paper, we propose a new algorithm named ProjectNet. ProjectNet models the relationships between head and tail entities after transforming them with different low-rank projection matrices. The low-rank projection can allow non one- to-one relationships between entities, while different projection matrices for head and tail entities allow them to originate in different semantic spaces. The experimental results demonstrate that ProjectNet yields more accurate word embedding than previous studies, and thus leads to clear improvements in various natural language processing tasks.

关键词： natural language processing word embedding neural network knowledge graph

On the Smarandache Pseudo Number Sequence

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Chinese Quarterly Journal of Mathematics 2006年第4期21卷 581-584页

作者： liu yah-hi Department of Mathematics Northwest University Xi＇an 710069 China

The main purpose of this paper is to study the mean value properties of thesecond Smarandache pseudo-odd number sequence and pseudo-even number sequence, andgive some interesting asymptotic formula for them.

关键词： pseudo-odd numbers pseudo-even numbers asymptotic formula.

Synthesis and Characterization of Novel Aliphatic Polycarbonates Bearing Pendant Allyl Ether Groups

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Chinese Chemical Letters 2006年第1期17卷 137-139页

作者： Gang liu Feng HE yah Ping WANG Jun FENG Ren Xi ZHUO Key Laboratory of Biomedical Polymers of Ministry of Education Department of Chemistry Wuhan University Wuhan 430072

A new six-membered cyclic carbonate monomer, 5-allyloxytrimethylene carbonate （ATMC）, was synthesized starting from glycerol, and the corresponding polycarbonates, poly（5-allyloxytrimethylene carbonate）（PATMC） were further synthesized by ring-opening polymerization in bulk at 150℃ using stannous octanoate as an initiator. The structures of the monomer and the polymers were confirmed by IR, IH-NMR, 13C-NMR, and GPC analysis.

关键词： 5-Allyloxytrmethylene carbonate poly(5-allyloxytrimethylene carbonate) ring-opening polymerization polycarbonate allyl ether.

Reconstruction of Ore-controlling Structures Resulting from Magmatic Intrusion into the Tongling Ore Cluster Area during the Yanshanian Epoch

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Acta Geologica Sinica(English Edition) 2007年第2期81卷 287-296页

作者： DENG Jun WANG Qingfei YANG Liqiang GAO Bangfei HUANG Dinghua liu yah XU Hao JIANG Shaoqing State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing 100083 Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of the Ministry of Education China University of Geosciences Beijing 100083 Faculty of Earth Sciences China University ofGeosciences Wuhan Hubei 430074

The Tongling ore cluster area experienced intensive compression and associated shearing during the Indosinian-Yanshanian Epoch, which formed a trunk ore-controlling fold and fault system in the caprock. The magmatic intrusion in the Yanshanian Epoch induced a multi-stage unmixing of poly-phase fluids, resulting in mineralization characterized by multi-layer, wide-range, and multiform styles. The magmatic intrusion in the Tongling area not only supplied the essential ore-forming materials, but also reconstructed the ore-controlling structures according to a trend surface simulation of the following five strata boundaries： Silurian-Devonian, Devonian-Carboniferous, Carboniferous- Permian, Middle Permian-Upper Permian and Permian -Triassic. The result of this simulation shows that there exists a significant difference between the strata in the upper part and those in the lower. The lower trend surfaces are antiform whereas the upper trend surfaces are synform. In addition, superposing of the trend surfaces of adjacent bed boundaries （such as, Silurian-Devonian boundary superposed upon Devonian-Carboniferous boundary） shows that the lower trend surface always pierces the one above. Moreover, the position and orientation of the pierced parts of the different superposed trend surfaces are similar and show E-W-trending zonal distribution in accordance with the distribution of the regional E-W-trending magmatic-metallogenic belt. Based on comprehensive analysis of the mechanical properties of the strata, structural deformation mechanisms, and field phenomena, it seems that the special characteristics of the stratal trend surface resulted from jacking due to magmatic intrusion into the caprock previously controlled by an E-W-trending basement fault. Therefore, it is deduced that the major ore-controlling structures, which formed during regional horizontal compression, were reconstructed by the vertical jacking function of ore-forming magmas during the Yanshanian Epoch. Durin

关键词： magma trend surface multi-layer mineralization unmixing Tongling ore cluster area Yanshanian

Endoscopic Submucosal Dissection of a Rectal Neuroendocrine Tumor Using Linked Color Imaging Technique

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Chinese Medical Journal 2017年第9期130卷 1127-1128页

作者： Xiao-Tian Sun Min Min Yi-Liang Bi Yang Xu yah liu Department of Gastroenterology 307 Hospital of Academy of Military Medical Science Beijing 100171 China Department of internal Medicine Clinic of August First Film Studio Beijing 100161 China

To the Editor： Endoscopic submucosal dissection （ESD） has been widely applied in clinical practice for resecting gastrointestinal mucosal lesions. However, the risk of post-ESD complications is relatively high, and the bleeding is one of the most common complications after ESD, which needs timely detection and treatment. At recent, several new endoscopic imaging techniques have been developed to improve the diagnostic efficiency. Linked color imaging （LCI）, which is a newly developed endoscopic technique, could enhance the color contrast and thus have advantage of identifying bleeding points during ESD. So far, whether the application of LCI in ESD procedure is feasible and sate has not been ever explored. In this report, we described a patient with rectal neuroendocrine tumor who was successfully treated by ESD using LCI.

关键词：出血世界卫生组织卫生服务需求胰岛素诊断显像酯酶类

家庭农场土地适度规模集中实现过程中的博弈研究

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中国人口·资源与环境 2018年第9期28卷 150-157页

作者：刘灵辉刘燕电子科技大学公共管理学院四川成都611731

在家庭联产承包责任制下,发展家庭农场既要解决"地从哪里来"问题,又要妥善解决土地集中成片且期限稳定问题,因此,如何实现传统农户的零碎化、块状化、超小化的土地格局向发展家庭农场所需的成片化、集中化、规模化的土地格局转变,是亟... 详细信息

在家庭联产承包责任制下,发展家庭农场既要解决"地从哪里来"问题,又要妥善解决土地集中成片且期限稳定问题,因此,如何实现传统农户的零碎化、块状化、超小化的土地格局向发展家庭农场所需的成片化、集中化、规模化的土地格局转变,是亟需解决的现实问题。在家庭农场通过土地流转实现规模化经营的过程中,家庭农场经营者不可避免要和众多农户围绕土地流转价格展开协商谈判和激烈博弈。本文通过构建博弈模型研究发现,家庭农场经营者可以通过提高土地流转价格的策略调动农户转出土地的主动性和积极性,减少或完全避免规模化成片土地上的"钉子户",然而,土地流转价格的调整幅度不是无限制的,家庭农场土地租金的最优增加额度与土地适度规模经营状态下单位土地面积总收益、政府给予家庭农场单位土地面积的补贴、家庭农场经营者与单个农户的平均交易成本三项因素呈正相关,与家庭农场土地适度规模经营状态下单位土地面积的生产资料支出、原始土地租金、"钉子户"给家庭农场经营者带来的经济损失这三项因素呈负相关。同时,家庭农场经营者分为两种类型:土地租金低容忍度和土地租金高容忍度。在家庭农场经营者为土地租金低容忍度时,最高土地租金支付额度不高于传统农户小规模分散经营状态下的农业净收益,在家庭农场经营者为土地租金高容忍度时,最高土地租金支付额度可以突破传统农户小规模分散经营状态下的农业净收益,但是存在家庭农场经营者与农户围绕调整农业生产结构或改变土地用途带来的增值收益的分成问题。

关键词：家庭农场土地集中土地流转土地租金最优增加额博弈分析

Mechanical stirring for highly efficient gas injection refining

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Transactions of Nonferrous Metals Society of China 2011年第8期21卷 1896-1904页

作者：刘燕张廷安佐野正道王强任晓冬赫冀成东北大学材料与冶金学院多金属共生矿生态化利用教育部重点实验室沈阳110006 日本名古屋大学

In gas injection refining processes,wide dispersion of small bubbles in the bath is indispensable for high refining *** mechanical stirring with unidirectional impeller rotation was tested using a water model for pursuing better bubble disintegration and *** of various factors on bubble disintegration and dispersion were *** factors were stirring mode,eccentricity and rotation speed,nozzle structure,nozzle immersion depth,and gas flow *** injection from a nozzle at the end of the impeller shaft and from an immersed lance was *** eccentric stirring,a vortex was formed away from the *** bubbles were produced in the strong turbulence or high shear stress field near the rotating impeller and moved in the direction to the vortex keeping up with the macroscopic flow induced by the mechanical *** small bubbles could disperse widely in the bath under eccentric stirring with unidirectional rotation.

关键词： gas injection refining eccentric mechanical stirring unidirectional impeller rotation bubble dispersion bubble disintegration macroscopic flow

Asymptotic Property for the Estimator of Nonparametric Regression Models Under Negatively Orthant Dependent Errors

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Chinese Quarterly Journal of Mathematics 2015年第2期30卷 300-307页

作者： PENG Zhi-qing ZHENG Lu-lu liu yah-fang XIAO Ru WANG Xue-jun School of Mathematical Sciences Anhui University Hefei 230601 China

In this paper, by using some inequalities of negatively orthant dependent(NOD,in short) random variables and the truncated method of random variables, we investigate the nonparametric regression model. The complete co... 详细信息

关键词： negatively orthant dependent random variables nonparametric regression model complete consistency