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船舶力学 2003年第6期7卷 100-115页

作者：顾学康 GauteStorhaug Jelena Vidic-Perunovic Gabriel Holtsmark jens block helmers 中国船舶科学研究中心无锡214082 挪威科技大学丹麦技术大学挪威船级社

本文研究一艘大型海船的波激振动问题。该船在运行过程中发生了频繁的波激振动,导致严重的结构裂纹。文中对四种预报船体波激振动响应的理论及其计算机程序进行了描述。这些理论在计算水动力载荷和结构振动时具有各自的特点,如:线性、... 详细信息

本文研究一艘大型海船的波激振动问题。该船在运行过程中发生了频繁的波激振动,导致严重的结构裂纹。文中对四种预报船体波激振动响应的理论及其计算机程序进行了描述。这些理论在计算水动力载荷和结构振动时具有各自的特点,如:线性、二阶、非线性、频域、时域、二维和三维等。相应的程序(WASIM,SOST,SINO和VERES)对低频波浪诱导响应预报已有较多的验证。文中对各程序在波激振动预报中的前提条件作了说明。计算中进行了参数敏感性分析并给出了主要结果。在与实船试验结果的比较过程中选择了十个不同的工况,对其海况、航向和试验现象给出了简要描述。对低频波浪诱导和高频波激振动响应分别进行了比较,得出了一些有意义的结论。

关键词：大型海船波激振动理论预报实船试验

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Techno-economic evaluation of a biogas-based oxidative coupling of methane process for ethylene production

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Frontiers of Chemical Science and Engineering 2018年第4期12卷 598-618页

作者： Alberto T.Penteado Mijin Kim Hamid R.Godini Erik Esche jens-Uwe Repke Process Dynamics and Operations Group Technische Universitat BerlinD-10623 BerlinGermany

This contribution is a preliminary techno-economic assessment of a biogas-based oxidative coupling of methane (OCM) process. Biogas is frequently utilized as a renewable energy source within small scale combined heat and power plants or as a natural gas substitute. The activation of methane also enables its utilization as a feedstock to produce chemicals. In this sense, the OCM process allows for the direct conversion of methane into ethylene, which is a major building block for the chemical and polymer industries. Biogas resulting from the anaerobic digestion of vinasse, a liquid effluent from bioethanol industry, is treated for contaminant removal and its methane content is converted into ethylene, which is then purified as the main product. The biogas cleaning process is assessed based on literature data, while an experimentally validated simulation model is used to assess the OCM process. A techno-economic evaluation is then performed through a Monte Carlo simulation, wherein uncertain parameters take random values between reasonable bounds. The net present value results positive in 74% of the cases, indicating that the project is profitable under a wide range of scenarios. Some performance improvement opportunities have been identified and highlighted to guide future studies in the topic.

关键词： biogas conversion ethylene production oxidative coupling of methane feasibility study

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双螺杆挤压机螺杆元件类型对扭矩和压力的影响

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农业机械学报 2007年第9期38卷 71-74,58页

作者：张波魏益民 Wolfgang Sietze jens Dreisoerner 康立宁中国农科院农产品加工研究所德国布拉本德仪器公司食品实验室西北农林科技大学食品科学与工程学院

以食用脱脂低温豆粕为原料,以Brabender DSE-25型双螺杆挤压膨化实验室工作站为加工设备,研究了不同几何参数的输送元件、捏合块和齿型盘6种螺杆元件对挤压过程中扭矩和压力的影响。结果表明:螺杆元件对扭矩和压力有显著影响;对扭矩影... 详细信息

以食用脱脂低温豆粕为原料,以Brabender DSE-25型双螺杆挤压膨化实验室工作站为加工设备,研究了不同几何参数的输送元件、捏合块和齿型盘6种螺杆元件对挤压过程中扭矩和压力的影响。结果表明:螺杆元件对扭矩和压力有显著影响;对扭矩影响的主次顺序为反向输送元件;齿型盘、捏合块、正向输送元件;有反向螺旋角或错裂角或对物料剪切强度大的元件能够显著增加扭矩;元件对压力的影响规律不明显。对系统稳定性的初步分析认为,错列角为45°和90°的捏合块具有较好的混炼效果,而齿型盘和错列角为-45°的捏合块的混炼效果较差。

关键词：双螺杆挤压机螺杆元件扭矩压力

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Global Disparity Estimation in Multi-view Video Coding

Global Disparity Estimation in Multi-view Video Coding

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第三届和谐人机环境联合学术会议（HHME2007）

作者： jens-Uwe Garbas Friedrich-Alexander University Erlangen-Nuremberg Erlangen91058Germany

Multi-view video coding is one of the most interesting technologies for some multimedia applications such as free-viewpoint video, Geo-media platform, geographic information system of Intergraph and so on. In multi-view video coding, global disparity is one of the major properties of the multi-view video, and disparity estimation is a very important method to reduce the view correlation between different views. In this paper, an efficient, robust, and fast global disparity estimation method is described by using eight-parameter perspective and six-parameter affine models, and phase correlation method for initial translation at the top of pyramid. To get the best disparity estimation, the R-D-optimal combination of global and local disparity re-estimation is given in proposed MVC scheme. Experimental results show the comparison of global perspective (affine) disparity estimation to block matching disparity estimation.

关键词： MVC GDE Perspective Affine Intergraph GIS

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Functionality of a next generation biosynthetic bacterial 6-phytase in enhancing phosphorus availability to weaned piglets fed a corn-soybean meal-based diet without added inorganic phosphate

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Animal Nutrition 2020年第1期6卷 24-30页

作者： Yueming Dersjant-Li Boris Villca Vincent Sewalt Arno de Kreij Leon Marchal Deepak E.Velayudhan Robin *** Trine Christensen Rie Mejldal Igor Nikolaev Sina Pricelius Hye-Sook Kim Svend Haaning jens F.Sorensen Rosil Lizardo DuPont Nutrition and Biosciences Archimedesweg302333CN Leidenthe Netherlands Institut de Recerca I Tecnologia Agroalimentaries Centre Mas de BoverCtra.Reus-El Morell km.3.8E-43120Constantly Spain DuPont Nutrition&Biosciences 925 Page Mill RoadPalo AltoCA 94304USA DuPont Nutrition&Biosciences 21 Biopolis RoadNucleosSouth Tower138567Singapore DuPont Nutrition and Biosciences Edwin Rahrs Vej 38DK-8220BrabrandDenmark

The utility of a next generation biosynthetic bacterial 6-phytase(PhyG)in restoring bone ash,bone phosphorus(P)content and performance in piglets depleted in P was evaluated.A total of 9 treatments were tested as *** 1,a negative control(NC)diet;treatments 2,3,4,NC supplemented with 250,500 or 1,000 FTU/kg of PhyG;treatments 5,6,NC supplemented with 500 or 1,000 FTU/kg of a commercial Buttiauxella sp phytase(PhyB);treatments 7,8,9,NC supplemented with monocalcium phosphate(MCP)to provide 0.7,1.4 and 1.8 g/kg digestible P,equating to a digestible P content of 1.8,2.5 and 2.9 g/*** latter constituting the positive control(PC)diet with adequate P and calcium(Ca).The NC was formulated without inorganic P(1.1 g digestible P/kg)and reduced in Ca(5.0 g/kg).Additional limestone was added to treatments 7 to 9 to maintain Ca-to-P ratio between 1.2 and 1.3.A total of 162 crossed Pietrain x(Large White×Landrace)21-d-old piglets(50%males and 50%females)were fed adaptation diets until 42 d old and then assigned to pens with 2 pigs/pen and 9 pens/treatment in a completely randomized block *** were fed mash diets based on corn and soybean meal ad libitum for 28 *** the end of the study,one piglet perpen was euthanized and the right feet collected for determination of bone strength,bone ash and mineral *** with the PC,the NC group had reduced average daily gain(ADG)and increased feed conversion ratio(FCR)during all growth phases and overall,and at d 28(70 d old)NC pigs had bones with reduced ash,Ca and P content(P500 FTU/kg,both PhyG and PhyB maintained ADG and FCR equivalent to *** regression analysis was done to compare the measured response parameters to increasing digestible P from *** on this analysis it was shown that PhyG and PhyB at 1,000 FTU/kg could replace 1,83 and 1.66 g/kg dige

关键词： Biosynthetic bacterial 6-phytase Bone ash Efficacy Growth performance Pigs

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