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	Rediscovering the location of agricultural production: Spatial linkage of farmland use intensity and labor opportunity costs in Central China 期刊论文 OAI收割 HABITAT INTERNATIONAL, 2024, 卷号: 152, 页码: 103160 作者: Jiang, Luguang; Liu, Ye \| 收藏 \| 浏览/下载：10/0 \| 提交时间：2024/10/21 The location of agricultural production Land use Multiple-cropping index Remote sensing Farming profit Opportunity cost China
	Agricultural land use intensity and its determinants: A case study in Taibus Banner, Inner Mongolia, China SCI/SSCI论文 OAI收割 2015 作者: Hao H. G.; Li, X. B.; Tan, M. H.; Zhang, J. P.; Zhang, H. Y. 收藏 \| 浏览/下载：39/0 \| 提交时间：2015/12/09 agricultural land use intensity labor intensity capital intensity opportunity cost of farm workers Taibus Banner off-farm work grain production nonfarm income labor migration policy communities environment pattern region
	A financial assessment of two alternative cultivation systems and their contributions to algae biofuel economic viability 期刊论文 OAI收割 ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS, 2014, 卷号: 4, 页码: 96-104 作者: Richardson, James W.; Johnson, Myriah D.; Zhang, Xuezhi; Zemke, Peter; Chen, Wei 收藏 \| 浏览/下载：27/0 \| 提交时间：2015/09/09 Photobioreactor Open raceway ponds Cost of production Monte Carlo simulation Farm-level Algae Model (FARM) Net cash income
	Design of a miniature axial flux flywheel motor with PCB winding for nanosatellites (EI CONFERENCE) 会议论文 OAI收割 2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China Wu J. 收藏 \| 浏览/下载：43/0 \| 提交时间：2013/03/25 This paper presents the design and analysis of an axial flux permanent-magnet (AFPM) machine for nanosatellites application. It is a miniature axial flux surface mounted permanent magnet flywheel motor using a printed circuit board (PCB) stator winding. The PCB stator has simplified the design and construction and avoids unnecessary space since size reduction has become one of the most important aspects of flywheel motor design for nanosatellites. The performances of the machine are estimated by combination method of three-dimensional (3D) electromagnetic finite element analysis (FEA) and approximate theoretical analysis. The back EMF and electromagnetic torque are derived. A comparison between the analysis and experimental measurement results of the prototype machine is also presented. Both simulated and experimental results show that the proposed motor would be an acceptable solution for the nanosatellite applications with advantages such as simple structure and low-cost as multi-layer circuit board production techniques have made the production of printed circuit coils cheaper and easier. 2012 IEEE.
	Estimation of tissue construction cost from heat of combustion and organic nitrogen content 期刊论文 OAI收割 Plant, Cell & Environment, 1987, 卷号: 10, 期号: 9, 页码: 725-734 K. WILLIAMS; F. PERCIVAL; J. MERINO; H. A. MOONEY 收藏 \| 浏览/下载：19/0 \| 提交时间：2013/11/15 Lepechinia catycina(Benth.) Epl. Diplacus aurantiacus(Curtis) Jeps. Heteromeles arbulifolia(Ait.) Roem. production value glucose equivalent construction cost heal of combustion biosynthetic efficiency growth efficiency