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Exploring differentiated improvement strategies of cultivated land quality in China
《农业科学与工程前沿(英文)》 doi: 10.15302/J-FASE-2023523
● Cultivated land quality can be considered in four dimensions: suitability, contiguity, resistance, and ecological stress.
关键词: China cultivated land quality differentiated improvement food security
Research progress on genetic improvement of
Chuanping YANG
《农业科学与工程前沿(英文)》 2017年 第4卷 第4期 页码 391-401 doi: 10.15302/J-FASE-2017183
关键词: Betula platyphylla genetic improvement molecular breeding seed orchard
A review of systematic evaluation and improvement in the big data environment
Feng YANG, Manman WANG
《工程管理前沿(英文)》 2020年 第7卷 第1期 页码 27-46 doi: 10.1007/s42524-020-0092-6
关键词: big data evaluation methods systematic improvement big data analytic techniques data mining
Huali HAN
《工程管理前沿(英文)》 2020年 第7卷 第4期 页码 618-621 doi: 10.1007/s42524-020-0142-0
关键词: renewable energy megawatt offshore wind turbine technology-driven quality improvement
Embryo-mediated genome editing for accelerated genetic improvement of livestock
Zachariah MCLEAN, Björn OBACK, Götz LAIBLE
《农业科学与工程前沿(英文)》 2020年 第7卷 第2期 页码 148-160 doi: 10.15302/J-FASE-2019305
Selecting beneficial DNA variants is the main goal of animal breeding. However, this process is inherently inefficient because each animal only carries a fraction of all desirable variants. Genome editing technology with its ability to directly introduce beneficial sequence variants offers new opportunities to modernize animal breeding by overcoming this biological limitation and accelerating genetic gains. To realize rapid genetic gain, precise edits need to be introduced into genomically-selected embryos, which minimizes the genetic lag. However, embryo-mediated precision editing by homology-directed repair (HDR) mechanisms is currently an inefficient process that often produces mosaic embryos and greatly limits the numbers of available edited embryos. This review provides a summary of genome editing in bovine embryos and proposes an embryo-mediated accelerated breeding scheme that overcomes the present efficiency limitations of HDR editing in bovine embryos. It integrates embryo-based genomic selection with precise multi-editing and uses embryonic cloning with elite edited blastomeres or embryonic pluripotent stem cells to resolve mosaicism, enable multiplex editing and multiply rare elite genotypes. Such a breeding strategy would enable a more targeted, accelerated approach for livestock improvement that allows stacking of beneficial variants, even including novel traits from outside the breeding population, in the most recent elite genetic background, essentially within a single generation.
关键词: animal breeding cattle cloning CRISPR/Cas9 cytoplasmic injection embryo genome editing germline chimaeras HDR livestock improvement TALENs
Jian-ya Jiang,Yang-wei Rao
《工程管理前沿(英文)》 2014年 第1卷 第4期 页码 406-409 doi: 10.15302/J-FEM-2014049
关键词: engineering management system education mode comparative research training improvement
Genetic improvement of wheat grain quality at CIMMYT
Carlos GUZMÁN, Karim AMMAR, Velu GOVINDAN, Ravi SINGH
《农业科学与工程前沿(英文)》 2019年 第6卷 第3期 页码 265-272 doi: 10.15302/J-FASE-2019260
The International Maize and Wheat Improvement Center (CIMMYT) is the global leader in publicly-funded maize and wheat research and in farming systems based on these crops. CIMMYT leads the Global Wheat Program (GWP), which includes some of the largest wheat breeding programs in the world. The GWP has been successful in developing wheat germplasm that is used extensively worldwide. Wheat quality improvement is a central component of all the breeding efforts at CIMMYT and the Wheat Chemistry and Quality Laboratory represents an integral part of the breeding programs. Wheat quality is addressed at CIMMYT over the full range of this very wide and variable concept with milling, processing, end-use and nutritional quality targeted. Wheat progenitors and advanced lines developed by the breeders are assessed for diverse quality attributes, with the aim of identifying those that fulfill the requirements in terms of milling, processing, end-use and nutritional quality in different target regions. Significant research is conducted to make more efficient the integration of wheat quality traits in the breeding programs. The main topics being addressed are (1) methodologies to analyze grain quality traits, (2) genetic control and environmental effects on quality traits, (3) characterization of genetic resources for quality improvement, and (4) diversifying grain properties for novel uses.
Molecular regulation and genetic improvement of seed oil content in
Wei HUA,Jing LIU,Hanzhong WANG
《农业科学与工程前沿(英文)》 2016年 第3卷 第3期 页码 186-194 doi: 10.15302/J-FASE-2016107
Air quality improvement in Los Angeles—Perspectives for developing cities
David D. Parrish,Jin Xu,Bart Croes,Min Shao
《环境科学与工程前沿(英文)》 2016年 第10卷 第5期 doi: 10.1007/s11783-016-0859-5
关键词: Air pollution Ozone Particulate matter Control technology
FOR USE IN AGROECOSYSTEM IMPROVEMENT IN SEMI-ARID AREAS WITH A FOCUS ON CENTRAL ANATOLIA, TURKEY
《农业科学与工程前沿(英文)》 2021年 第8卷 第4期 页码 568-582 doi: 10.15302/J-FASE -2019270
Agroecosystems in water-limited contexts— Mediterranean, semi-arid and arid climatic zones—are too frequently degraded systems that will not provide the needed ecosystem services to ensure a future of sustainable agricultural production. The processes that have created this situation continue and are being accelerated by anthropogenic climate change. Increasing arboreal vegetation in these areas through agroforestry is an important strategy to conserve and improve their agroecosystems. Actinorhizal trees and shrubs in the Casurinaceae have a unique set of adaptations for heat and water stress, and/or infertile to hostile soils. Central Anatolia, Turkey is particularly at risk of increasing aridity and further degradation. Therefore, species of Allocasuarina and Casuarina have been evaluated for their potential use in agroecosystem improvement in semi-arid areas with a focus on Central Anatolia. Based on a semiquantitative environmental tolerance index and reported plant stature, eight species were identified as being of high (A. verticillata and C. pauper) to moderate (A. acutivalvis, A. decaisneana, A. dielsiana, A. huegeliana, C. cristata and C. obesa) priority for assessment, with none of these species having been adequately evaluated for agroforestry deployment in semi-arid agroecosystems in any context.
关键词: actinorrhizal trees / agroforestry / climate change / ecosystem restoration
Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0968-8
关键词: ductility four-point bending test glass fiber-reinforced polymer precast confined concrete block
Numerical study of internal flow field and flow passage improvement of an inlet particle separator
Florian PAOLI, Tong WANG
《能源前沿(英文)》 2011年 第5卷 第4期 页码 386-397 doi: 10.1007/s11708-011-0156-8
关键词: streamlines pressure losses flow passage improvement inlet particle separator (IPS)
Xuming LIU, Xiafan XU, Biao YANG, Xiaotong XI, Liubiao CHEN, Junjie WANG, Yuan ZHOU
《能源前沿(英文)》 2021年 第15卷 第2期 页码 345-357 doi: 10.1007/s11708-020-0708-x
关键词: radiation heat leakage active thermal insulation cascade utilization cold energy performance improvement cryocooler
Hui Ching FAN, Hong Sen YAN
《机械工程前沿(英文)》 2012年 第7卷 第1期 页码 5-15 doi: 10.1007/s11465-012-0310-y
Without modifying the cam contour, a cam mechanism with a variable input speed trajectory offers an alternative solution to flexibly achieve kinematic and dynamic characteristics, and then decrease the follower’s residual vibration. Firstly, the speed trajectory of cam is derived by employing Bezier curve, and motion continuity conditions are investigated. Then the motion characteristics between the plate cam and its roller follower are derived. To analyze the residual vibration, a single degree of freedom dynamic model of the elastic cam-follower system is introduced. Based on the motion equation derived from the dynamic model, the residual vibration of the follower is yielded. The design procedure to improve the kinematic and dynamic motion characteristics is presented and two design examples with discussions are provided. Finally, the simulations of the kinematic and dynamic models by ADAMS are carried out and verified that the design models as well as the performances of the mechanism are feasible.
关键词: cam mechanism variable input speed kinematic design dynamic design optimal design
敖大光,曾志诚,李波,车进周
《中国工程科学》 2002年 第4卷 第5期 页码 67-70
介绍了我国南方最大的河流珠江航道整治的成功经验。整治河段位于珠江西、北两江交汇区,不同类型浅滩多,水流条件复杂,而且是行洪干道之一,整治难度大。根据原型水文资料及河道地形资料,进行了水动力条件、来水来沙条件和河床演变的分析;结合模型试验,揭示了浅滩成因和形成机理;采取有针对性的整治工程布局,并应用在实际治理工程中。
标题 作者 时间 类型 操作
A review of systematic evaluation and improvement in the big data environment
Feng YANG, Manman WANG
期刊论文
Quality and efficiency improvement technology for five megawatt offshore wind turbines and its application
Huali HAN
期刊论文
Embryo-mediated genome editing for accelerated genetic improvement of livestock
Zachariah MCLEAN, Björn OBACK, Götz LAIBLE
期刊论文
Management System and Education Model in Developed Countries for Engineering Management Major Education Improvement
Jian-ya Jiang,Yang-wei Rao
期刊论文
Genetic improvement of wheat grain quality at CIMMYT
Carlos GUZMÁN, Karim AMMAR, Velu GOVINDAN, Ravi SINGH
期刊论文
Molecular regulation and genetic improvement of seed oil content in
Wei HUA,Jing LIU,Hanzhong WANG
期刊论文
Air quality improvement in Los Angeles—Perspectives for developing cities
David D. Parrish,Jin Xu,Bart Croes,Min Shao
期刊论文
FOR USE IN AGROECOSYSTEM IMPROVEMENT IN SEMI-ARID AREAS WITH A FOCUS ON CENTRAL ANATOLIA, TURKEY
期刊论文
Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone
期刊论文
Numerical study of internal flow field and flow passage improvement of an inlet particle separator
Florian PAOLI, Tong WANG
期刊论文
Performance improvement of a pulse tube cryocooler with a single compressor through cascade utilization
Xuming LIU, Xiafan XU, Biao YANG, Xiaotong XI, Liubiao CHEN, Junjie WANG, Yuan ZHOU
期刊论文
On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate
Hui Ching FAN, Hong Sen YAN
期刊论文