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Now showing items 1 - 16 of 447

  • Overview of the SAMPL5 host–guest challenge: Are we doing better?

    Yin, Jian   Henriksen, Niel M.   Slochower, David R.   Shirts, Michael R.   Chiu, Michael W.   Mobley, David L.   Gilson, Michael K.  

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  • Multi-task learning using a hybrid representation for text classification

    Lu, Guangquan   Gan, Jiangzhang   Yin, Jian   Luo, Zhiping   Li, Bo   Zhao, Xishun  

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  • Simulation Study on the Influence Law of Two-body Wear in Sliding Guide Ways

    Zhang, Shengfang   Hao, Qiang   Sha, Zhihua   Liu, Yu   Yin, Jian   Ma, Fujian   Yang, Dapeng  

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  • Highly parallel GEMV with register blocking method on GPU architecture

    Yin, Jian   Yu, Hui   Xu, Weizhi   Wang, Yuxuan   Tian, Zhu   Zhang, Yingping   Chen, Bochuan  

    GPUs can provide powerful computing ability especially for data parallel applications, such as video/image processing applications. However, the complexity of GPU system makes the optimization of even a simple algorithm difficult. Different optimization methods on a GPU often lead to different performances. The matrix-vector multiplication routine for general dense matrices (GEMV) is an important kernel in video/image processing applications. We find that the implementations of GEMV in CUBLAS or MAGMA are not efficient, especially for small or fat matrix. In this paper, we propose a novel register blocking method to optimize GEMV on GPU architecture. This new method has three advantages. First, instead of using only one thread, we use a warp to compute an element of vector y so that the method can exploit the highly parallel GPU architecture. Second, the register blocking method is used to reduce the requirement of off-chip memory bandwidth. At last, the memory access order is elaborately arranged for the threads in one warp so that coalesced memory access is ensured. The proposed optimization methods for GEMV are comprehensively evaluated on different matrix sizes. The performance of the register blocking method with different block sizes is also evaluated in the experiment. Experiment results show that the new method can achieve very high speedup for small square matrices and fat matrices compared to CUBLAS or MAGMA, and can also achieve higher performance for large square matrices. (C) 2014 Elsevier Inc. All rights reserved.
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  • Ablation Behaviors of 3D Fine Woven Pierced Carbon/Carbon Composites

    Yin, Jian   Zhang, Hong Bo   Xiong, Xiang   Tao, Hui Jin  

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  • Evapotranspiration estimation using Landsat-8 data with a two-layer framework

    Yin, Jian   Wang, Hailong   Zhan, Chesheng   Lu, Yang  

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  • Study on Preparation of High Early Strength Recycled Aggregate Concrete

    Yin, Jian   Song, Wei Min   Chi, Yi   Zou, Wei  

    An orthogonal experimental design method was adopted for the mix design of high early strength recycled aggregate concrete (HSRAC), and the influence of water-binder ratio, percentage of recycled aggregate(RA)and highly active compound mineral admixture (HACMA) content on the strength of the concrete was discussed. The test results indicated that water-binder ratio was the most principal and significant influencing factor on the strength of HSRAC, regardless of age. An empirical relationship among the strength of HSRAC, the water-binder ratio, the percentage of recycled aggregate and HACMA content was proposed by using multivariate regression analysis. The demand of opening heavy or heavier traffics and rapid repair concrete on strength to HSRAC could be all met.
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    Provided are a non-bracket LED encapsulation structure and a manufacturing method therefor. The manufacturing method for a non-bracket LED encapsulation structure comprises the manufacturing of an LED lamp string. The LED lamp string is formed by several LED chips connected to each other in series; the LED chips are flip chips; a positive electrode and a negative electrode are provided at the bottom of the LED chips; the LED lamp string comprises more than one group of light-emitting combinations; the light-emitting combinations comprise two rows of the LED chips; a first row of the LED chips (1) is formed by several first LED chips (11) arranged in a line at equal intervals; the first row of the LED chips is covered with a first fluorescent glue layer (31); a second row of the LED chips (2) is formed by several second LED chips (21) arranged in a line at equal intervals; the first LED chips and the second LED chips are arranged in a staggered manner; the first LED chips are opposite to bottom faces of the second LED chips; electrodes (111, 211) of the first LED chips and the second LED chips which are staggered are fitted with each other to form an electrical connection, and the two electrodes forming the electrical connection have opposite polarities; and the second row of the LED chips is covered with a second fluorescent glue layer. The non-bracket LED encapsulation structure is simple in structure and manufacturing process, and has a great out-exiting effect.
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    The present invention relates to novel copolymers containing cross-linkable and graft- able moieties, novel compositions comprised of these novel copolymers and a solvent, and methods for using these novel compositions to form neutral layer films which are both cross-linked and grafted on the substrate which are used in processes for aligning microdomains of block copolymers (BCP) on this neutral layer coated substrate such as self-assembly and directed self-assembly. The novel compositions are comprised of at least one novel random copolymer comprised of least one unit of structure (1), at least one unit of structure (2) at least one unit of structure (3) one ∼∼∼ H end group and one end group having structure (1'); where R1 is selected from the group consisting of a C1-C8 alkyl, C2-C8 fluoroalkyl, C4- C-8 partially fluorinated alkyl moiety, C4-C8 cycloalkyl, C4-C8 cyclofluoroalkyl, C4-C8 partially fluorinated cycloalkyl, and a C2-C8 hydroxyalkyl; R2, R3 and R5 are independently selected from a group consisting of H, C1-C4 alkyl, CF3 and F; R4 is selected from the group consisting of H, C1-C8 alkyl, C1-C8 partially fluorinated alkyl moiety and d-C-e fluoroalkyl, n ranges from 1 to 5, R6 is selected from the group consisting of H, F, d-C-e alkyl and a d-C-e fluoroalkyl and m ranges from 1 to 3, and n' ranges from 1 to 5, and n" ranges from 1 to 5, n'" ranges from 1 to 5, R7 is a C1 to C8 alkyl and X is -CN, or an alkyloxycarbonyl moiety R8-0-(C=0)- where Re is a C1 to C8 alkyl and ∼∼∼ represent the attachment point of the end group to the polymer. The novel polymers, compositions and processes are useful for fabrication of electronic devices.
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    A method and apparatus for measuring the length of an optical fiber, which are used for measuring the length of an optical fiber between a first device and a second device. The method comprises: a measurement device acquires timestamp parameters, wherein the timestamp parameters comprise a first sending timestamp Ta1, a first receiving timestamp Ta2, a second sending timestamp Tb1 and a second receiving timestamp Tb2 (101); and the measurement device determines the length L of the optical fiber according to the timestamp parameters (102), wherein when (Ta2-Tb1)+(Tb2-Ta1)≤T, L=2.5*[(Ta2-T b1)+(Tb2-Ta1)], and when (Ta2-Tb1)+(Tb2-Ta1)>T, L=2.5*[(Ta2-Tb1)+(Tb2-Ta1)-T]. The method and the apparatus do not depend on dedicated measurement instruments such as an OTDR, an OFDR and an OCDR, simplify the measurement process, and help to reduce measurement cost.
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    The present invention relates to a novel diblock copolymer comprising a repeat unit (1) and a repeat unit (2), where R1 is hydrogen or C1-C4 alkyl, R2 is selected from a group chosen from hydrogen, C1-C4 alkyl, C1-C4 alkoxy and halide, R3 is selected from a group chosen from hydrogen, C1-C4 alkyl and C1-C4 fluoroalkyl, and R4, R5, R6, R7, R8, R9, R10, R11, and R12 are independently chosen from a C1-C4 alkyl and n= 1-6. The invention also relates to a novel composition comprising the novel polymer and a solvent. The invention further relates to a process utilizing the novel composition for affecting directed self-assembly of the block copolymer.
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  • Modeling Quasi-Static Errors in a Five-Axis Gantry Machine Tool

    Yin, Jian   Li, Ming   Pan, Fang Yu  

    Enhancing the accuracy of machine tool is a key goal of machine tool manufactures and users. To characterize the Quasi-static errors and then use software compensation is an important step for accuracy enhancement. The effectiveness of an error compensation scheme relies heavily on the error model. The model must be concise and roust which can be applied to any machine tool. The total Quasi-static errors within the workspace of a five-axis gantry machine tool is composed of geometric error, kinematic error, thermal error. This paper presents an error model which can be used for practical compensation scheme. Homogeneous transformation matrix, rigid body kinematic and small angle approximations are used in this paper for error modeling.
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  • Neural Network Based Expert System for Steel Bar Pipeline Fault Diagnosis

    Yin, Jian   Mei, Li Ting  

    In modem continuing steel bars production pipeline, there are various equipments and automatic controls combining with mechanism, electricity, hydraulic pressure and aerodynamic. This field of fault detection and diagnosis deals with design of computer-based automated system that can assist plant operators. The neural network based expert system have advantages of parallel distributed processing, high robust, fault tolerance, adaptive and self-organization. Applying neural network based expert system for the condition detection and fault diagnosis of steel bars pipeline can reduce the economic loss caused by system downtime.
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  • Recent advances in the stereoselective synthesis of carbohydrate 2-C-analogs

    Yin, Jian   Linker, Torsten  

    C-branched carbohydrates are of current interest for glycochemistry, are widely found in nature and serve as important subunits in many antibiotics, bacterial polysaccharides and macrolides. Among C-functionalized saccharides, 2-C-branched carbohydrates represent challenging structures for synthetic chemists, since in contrast to C-glycosides they are not easily accessible from glycosyl bromides or other simple precursors. In this perspective we want to summarize recent approaches to 2-C-branched carbohydrates over the past fifteen years. The two main strategies are based on ring-opening of 1,2-cyclopropanated carbohydrates by various reagents, as well as radical additions to glycals and further transformations, developed in our group. Both methods are characterized by high stereoselectivities and good yields and give access to a broad variety of functionalized carbohydrate 2-C-analogs.
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    The present invention relates a novel aqueous composition comprising polymeric thermal acid generator and a process of coating the novel composition onto photoresist pattern, thereby forming a layer of the polymeric thermal acid generator over the photoresist pattern. The polymeric thermal acid generator comprises a polymer having at least one repeating unit of structure 2; where R1 to R5 are independently chosen from the group consisting of H and C1-C6 alkyl; R6 is chosen from the group consisting of unsubstituted aryl, substituted aryl, alkyl (C1-C8) and fluoroalkyl (C1-C8) and W is a C2-C6 alkylene spacer.
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    Disclosed herein is a formulation for depositing a cured underlayer for promoting the formation of self assembled structures. The underlayer comprises: (a) a polymer comprising at least one pendant vinyl ether monomer repeat unit having the structure, (I): wherein R is chosen from H, C1-C4 alkyl, or halogen, and W is a divalent group chosen from C1-C6 alkylene, C6-C20 arylene, benzylene, or C2-C20 alkyleneoxyalkylene; (ii) optional thermal acid generator; and (c) a solvent. The invention also relates to processes of forming a pattern using the underlayer.
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