This paper tentatively discusses the necessity and the requirements to better educate joint UB1-HIT master students from an engineering and engineer's perspective.The author argues that the students should have a ...This paper tentatively discusses the necessity and the requirements to better educate joint UB1-HIT master students from an engineering and engineer's perspective.The author argues that the students should have a broader engineering culture.After having given the context and basic definitions,the paper presents the author's view on how to better develop the engineering capabilities from a knowledge acquisition and learning point of view.Requirements for engineering education are addressed,based,among others,on the professional experience the first author built up while serving as senior manager in information technology and business transformation,at Capgemini Consulting(Belgium).A series of conclusions are given at the end of the paper.展开更多
The forming process of biomass fuel pellets using a ring mold pelletizer was analyzed,optimized,tested and evaluated in this study.The effects of stress amplitude and the stress ratio on the fatigue failure of the rin...The forming process of biomass fuel pellets using a ring mold pelletizer was analyzed,optimized,tested and evaluated in this study.The effects of stress amplitude and the stress ratio on the fatigue failure of the ring mold under 4-,3-,and 2-roller designs were investigated.Depending on the calculation of stress amplitude acting on the ring mold,the 4-roller design was chosen for having the smallest value of stress amplitude in this condition.After determining the main design parameters,a three-dimensional model of the ring mold pelletizer was established based on the Pro/Engineer software,and the model was transferred into ADAMS software through Mechanism/Pro which is a dedicated interface software.The ADAMS software was used to run simulations.In order to obtain the highest efficiency and the lowest power consumption,the optimal result was the 4-roller design.Finally,a prototype of the ring mold pelletizer with four rollers was designed and manufactured for biomass fuel pellet production.Corn stover biomass was used as material for experimental manufacturing of fuel pellets.Test and evaluation showed that the optimized pellet durability was 99.79%with ground corn stover particles passing a screen size of 1.97 mm,moisture content of 21.2%w.b.and a material moisture conditioning time of 3.82 h.Pellets formed in the prototype ring mold pelletizer using corn stover had acceptable durability according to European standards.展开更多
Genetically engineered plants hold enormous promise for tackling global food security and agricultural sustainability challenges.However,construction of plant-based genetic circuitry is constrained by a lack of well-c...Genetically engineered plants hold enormous promise for tackling global food security and agricultural sustainability challenges.However,construction of plant-based genetic circuitry is constrained by a lack of well-characterized genetic parts and circuit design rules.In contrast,advances in bacterial synthetic biology have yielded a wealth of sensors,actuators,and other tools that can be used to build bacterial circuitry.As root-colonizing bacteria(rhizobacteria)exert substantial influence over plant health and growth,genetic circuit design in these microorganisms can be used to indirectly engineer plants and accelerate the design-build-test-learn cycle.Here,we outline genetic parts and best practices for designing rhizobacterial circuits,with an emphasis on sensors,actuators,and chassis species that can be used to monitor/control rhizosphere and plant processes.展开更多
In the past two years,deep canyons and steep cliffs were the worksites for Feng Zhiguo,an engineer with China Railway Major Bridge Reconnaissance and Design Institute Co.Ltd.,a company famous for designing large bridges.
PTC公司近日宣布，威迩徕德电力设备（上海）有限公司采用PTC产品数据管理平台WindchillPDMLink、产品数据可视化ProductView、三维设计软件Pro／ENGINEER及其附加模块管道和布线（Piping and Cabling）、电气原理图设计（Routed System...PTC公司近日宣布，威迩徕德电力设备（上海）有限公司采用PTC产品数据管理平台WindchillPDMLink、产品数据可视化ProductView、三维设计软件Pro／ENGINEER及其附加模块管道和布线（Piping and Cabling）、电气原理图设计（Routed Systems Designer、以及技术插图工具（Arbortext IsoDraw CADprocess），展开更多
文摘This paper tentatively discusses the necessity and the requirements to better educate joint UB1-HIT master students from an engineering and engineer's perspective.The author argues that the students should have a broader engineering culture.After having given the context and basic definitions,the paper presents the author's view on how to better develop the engineering capabilities from a knowledge acquisition and learning point of view.Requirements for engineering education are addressed,based,among others,on the professional experience the first author built up while serving as senior manager in information technology and business transformation,at Capgemini Consulting(Belgium).A series of conclusions are given at the end of the paper.
基金the financial support received from the China Scholarship Council(201308210283)the national Spark Program(2015GA650012)+1 种基金the Cultivation Plan for Youth Agricultural Science and Technology Innovative Talents of Liaoning Province(2014053)the funding provided by Youth Fund of Shenyang Agricultural University(20121002)。
文摘The forming process of biomass fuel pellets using a ring mold pelletizer was analyzed,optimized,tested and evaluated in this study.The effects of stress amplitude and the stress ratio on the fatigue failure of the ring mold under 4-,3-,and 2-roller designs were investigated.Depending on the calculation of stress amplitude acting on the ring mold,the 4-roller design was chosen for having the smallest value of stress amplitude in this condition.After determining the main design parameters,a three-dimensional model of the ring mold pelletizer was established based on the Pro/Engineer software,and the model was transferred into ADAMS software through Mechanism/Pro which is a dedicated interface software.The ADAMS software was used to run simulations.In order to obtain the highest efficiency and the lowest power consumption,the optimal result was the 4-roller design.Finally,a prototype of the ring mold pelletizer with four rollers was designed and manufactured for biomass fuel pellet production.Corn stover biomass was used as material for experimental manufacturing of fuel pellets.Test and evaluation showed that the optimized pellet durability was 99.79%with ground corn stover particles passing a screen size of 1.97 mm,moisture content of 21.2%w.b.and a material moisture conditioning time of 3.82 h.Pellets formed in the prototype ring mold pelletizer using corn stover had acceptable durability according to European standards.
基金CMD is supported by a postdoctoral fellowship from the TomKat Center for Sustainable Energy at Stanford University.
文摘Genetically engineered plants hold enormous promise for tackling global food security and agricultural sustainability challenges.However,construction of plant-based genetic circuitry is constrained by a lack of well-characterized genetic parts and circuit design rules.In contrast,advances in bacterial synthetic biology have yielded a wealth of sensors,actuators,and other tools that can be used to build bacterial circuitry.As root-colonizing bacteria(rhizobacteria)exert substantial influence over plant health and growth,genetic circuit design in these microorganisms can be used to indirectly engineer plants and accelerate the design-build-test-learn cycle.Here,we outline genetic parts and best practices for designing rhizobacterial circuits,with an emphasis on sensors,actuators,and chassis species that can be used to monitor/control rhizosphere and plant processes.
文摘In the past two years,deep canyons and steep cliffs were the worksites for Feng Zhiguo,an engineer with China Railway Major Bridge Reconnaissance and Design Institute Co.Ltd.,a company famous for designing large bridges.
文摘PTC公司近日宣布，威迩徕德电力设备（上海）有限公司采用PTC产品数据管理平台WindchillPDMLink、产品数据可视化ProductView、三维设计软件Pro／ENGINEER及其附加模块管道和布线（Piping and Cabling）、电气原理图设计（Routed Systems Designer、以及技术插图工具（Arbortext IsoDraw CADprocess），
