Cui S.,China Academy of Building Research |
Kong X.,China Academy of Building Research |
Dong C.,China Academy of Building Research |
Gu F.,Chiping Construction Superintend Station |
Lv H.,Test Center
Applied Mechanics and Materials | Year: 2011
Using SEM observation and X-ray diffraction analysis, explore the growth mechanism of green high performance concrete strength, study the microstructure of green high performance concrete as well as the species and state of products, to prove fly ash, mineral powder and additive can greatly enhance the strength, density and durability of concrete, and finally make low-strength concrete satisfy the need of green high performance. © (2011) Trans Tech Publications.
Zeng H.,University of Science and Technology Beijing |
Zhang B.,University of Science and Technology Beijing |
Mu Z.,University of Science and Technology Beijing |
Wu H.,Test Center |
Wang X.,Hebei Normal University
Proceedings - 2013 7th International Conference on Image and Graphics, ICIG 2013 | Year: 2013
This paper proposes a multiscale 3D keypoint detection method based on local weighted dissimilarity measure. At first, compute the local weighted dissimilarity measure of each vertex at different scale. Then determine the detecting scale of each vertex. Finally compare the local weighted dissimilarity measure of each vertex with those of its neighboring surface points at its detecting scale. The keypoint is defined as the vertex that has highest local weighted dissimilarity measure in its neighborhood. The contribution of this paper includes that we propose a novel local weighted dissimilarity measure and the frame of multiscale keypoint detection method. The proposed local weighted dissimilarity measure is computed from the shape index value, and it is invariable to rotation and translation transformation. The multiscale algorithm frame enable the detected key points are robust to noise, especially to high level noise. Extensive experiments have performed to testify the effectiveness of the proposed method. © 2013 IEEE.
Gao H.,Shandong University |
Gao H.,China West Normal University |
Zhao S.,Shandong University |
Cheng X.,Shandong University |
And 2 more authors.
Chemical Engineering Journal | Year: 2013
An adsorbent of magnetic polymer multi-wall carbon nanotube (MPMWCNT) nanocomposite was synthesized, which was composed of multi-wall carbon nanotubes, poly(1-glycidyl-3-methylimidazolium chloride) (ionic liquid-based polyether) and ferroferric oxide. The properties of MPMWCNT were investigated by transmission electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy and thermogravimetric analysis. The adsorptive capacity of MPMWCNT was examined using anionic azo dyes of orange II, sunset yellow FCF and amaranth as adsorbates. The effect of pH value was investigated and the adsorption kinetics and isotherms were also studied. It was found that a low pH value favors the adsorption of those anionic azo dyes and the adsorption kinetics and isotherms were well fitted by a pseudo second-order model and Langmuir model, respectively. The introduction of ionic liquid-based polyether and ferroferric oxide moieties into the multi-wall carbon nanotubes brings significant improvements in the adsorption and separation performance. © 2013 Elsevier B.V.
« Versalis and Genomatica successfully produce bio-rubber with bio-butadiene from sugars | Main | NVIDIA DRIVE PX 2 platform to power world’s first robotic motor sports competition » Norway-based aluminum company Sapa is opening an automotive-focused R&D laboratory—Sapa Technology Americas—in Michigan, dedicated to the research and development of extruded aluminum solutions for the automotive industry. Sapa Technology is Sapa’s corporate research and development hub. Established in 1963 and with its base in Sweden, the R&D unit has expertise in material, physics, chemistry and mechanical engineering. Sapa Technology Americas, located near Detroit, represents an extension with an automotive focus. Sapa’s automotive customers include OEMs such as Ford, General Motors, BMW, Jaguar, Land Rover and Tesla, as well as Tier 1 suppliers such as MAHLE, Benteler, Panasonic and TI Automotive. Sapa Technology Americas has five engineers on staff and expects to further increase manning before the end of the year, says lab manager Nathan Nickolopoulos, who adds that Sapa has invested more than $3 million in new equipment at the Troy site. Most of the equipment has been installed and is in use. Sapa Technology Americas provides service to the business areas within the company, specifically on projects requested by Sapa's North America Technical Center (NATC), its plant network and corporate R&D. In addition to its current portfolio, Sapa Technology Americas is working toward ISO 9001 and 17025 certification, which it expects to achieve this summer. The lab will not handle external queries, aside from projects with key academic partners, such as Michigan Technological University. The key disciplines available at Sapa Technology Americas include: In addition to Sapa Technology and its new satellite in Troy, the company has technical expertise working around the world in market-specific or industry-related centers. In the United States, these include the NATC in Michigan, Oregon and other locations, and the Corrosion Test Center in Florida.
Solar panels promise a lot – a cleaner, cheaper, renewable energy source, harnessed from the abundant rays of the sun. But the technology created to pull in that sun power can only go so far per square foot, depending on the panel. SolarCity, the sun-powered startup founded by Elon Musk’s cousins Lyndon and Peter Rive, announced today that it has created the world’s most efficient solar panel, with a 22 percent module-level efficiency. Compare that to SunPower’s close rival X-Series panels at 21.5 percent module-level efficiency. Bright, a startup out of Y Combinator that installs solar panels in Mexico, agreed that if SolarCity’s new panel is indeed producing a 22 percent module-level efficiency, it would make the panels the most efficient. At least on the surface. “The big caveat is that once you use more expensive materials, such as GaAs, the efficiency for modules can go way up (north of 40 percent),” Bright founder Jonah Greenberger told TechCrunch. SolarCity created its new panel via a proprietary process that it claims not only ups the performance, but also significantly reduces the manufacturing cost relative to other high-efficiency technologies at the same size as other solar panels, adding an additional 30 to 40 percent more power per panel. The percentages of overall energy production and module-level can be confusing but don’t get lost in them. The gist is these panels promise to have a higher output at a lower production cost – and SolarCity says it is the most efficient solar panel at the moment, reducing waste – cuttings costs for both consumer and company and adding an attractive amount of power performance. SolarCity backs up the claim with third-party, independent testing from the Renewable Energy Test Center, an energy services and certification testing facility for solar panel products. The sun-powered provider expects to install these new panels on rooftops and carports, initially and then move to commercial installations. SolarCity plans to produce a small batch of the new modules out of its 100 MW pilot facility in Fremont, California this month and then will move production to SolarCity’s 1 GW facility in Buffalo, N.Y. The company expects to produce 9,000 to 10,000 solar panels per day when production is in full swing. The company recently announced an initiative to lower the cost of sun power for lower-income families. In a partnership with solar panel installation firm Everyday Energy, SolarCity will work with affordable-housing developers to install its solar systems in California.