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This paper presents a novel passive adhesion principle which is used firstly for an inspired modular climbing caterpillar project. After a related survey on the natural creatures which can climb on the vertical surface with different materials, a systematical summarizing on four attachment methods adopted by climbing robots worldwide is given. Then a low-frequency vibrating passive attachment principle...
The structured query language (SQL) of relational database models does not have the expressive power to implement recursive queries. Consequently, recursive queries are implemented as an application program in the host language. The newly developed XML schema provides a different setting for database design and query implementation. In this paper, we design and implement an XML schema and a set of...
The paper reports the results of a systematic improvement project on the thermal cycle (TC) lifetime prediction of BGA memory modules with SnAg1.0Cu0.5 and SnAg1.0Cu0.5Ni0.05 solder alloys. The pre-existing lifetime modeling scheme allowed predictions with an inaccuracy factor of about 1.6plusmn1 on average while in TC experiments, the characteristic lifetime, N63, showed a standard deviation of about...
A novel design for a Dielectric Elastomer (DE) actuator is presented. The actuator is obtained by coupling a conically shaped DE film with a compliant mechanism. The compliant mechanism is designed to suitably modify the force generated by the elastomer film. The resulting actuator provides a nearly constant force along the entire actuator stroke when the DE film is activated and quickly returns to...
We define a transfer function based on the first and second statistical moments. We consider the evolution of the mean and variance with respect to a growing neighborhood around a voxel. This evolution defines a curve in 3D for which we identify important trends and project it back to 2D. The resulting 2D projection can be brushed for easy and robust classification of materials and material borders...
Crude extract, essential oil and oleoresin of fresh Zingeber Officinale Roscoe was studied for their antioxidant activity. Free radical scavenging activity was determined using DPPH free radical assay which based on the inhibition of the free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH). Concentrations 20-100% of these were prepared and their antioxidant activity was determined by spectrophotometer...
Computers have been used to present a wide variety of digital learning material. However, most of the times computers are used for presenting learning material in a linear, pre-arranged sequence, using a one-to-many communication model between teacher and students. This single-speaker paradigm limits the students' participation and hinders the interaction with the teacher. The teacher is unable to...
A range of novel biomass-derived sunscreens and additives were synthesized by substituting corn-produced isosorbide with different functional moieties, such as naturally-occurring cinnamic acids. Based on the different reactivity of the two isosorbide hydroxyl groups, an effective synthetic route was developed for making multifunctional molecules such as UV-absorbing polymer plasticizers and antioxidants...
It seems that actual software tools utilizing computer-mediated communication mechanisms - like messaging or chat systems - do not help young students to learn good grammar skills. On the other hand, it is difficult to design and build software tools for supporting the acquisition of language skills, especially if those tools must support a group of student working in a collaborative way. In this...
This paper aims to present the online learning platform developed by the 2007 Local Academy of the Year in order to standardize and automatize the specific activities and processes of the Cisco Networking Academy and truly offer students the basic tenets of LifeLongLearning: any time, any place, any pace. The paper begins with the main shortcomings of the Cisco management tools for local academies...
Restoration of lost bones and their function is a major issue for bone tissue engineering. Although numerous synthetic biomaterials have been developed to overcome the problems associated with autologous or allogeneic therapeutic bone grafts, there remains a great challenge to design an idea bone substitute. Furthermore, electrospinning is an effective method of producing nano-fibrous structure. In...
Tethered flight patterns of Cletus rusticus Stal are separated into 2 groups, multi-halts group and oligo-halts group. The multi-halts group has 9 patterns, Biansu-Wending-Jiangsu pattern, Wending-Sushuai pattern, Kuanji-Duoting pattern, Za-Duoting pattern, ZhongqiBiansu-HouqiHuanjiang pattern, QianhouWending-ZhongqiBiansu pattern, Guilu pattern, Xiao-Chitiao pattern, and Kuaisu-Jiangsu pattern. The...
Human resources of colleges and universities were the most important resource in higher education resources and important assurance of higher education development, and teachers of colleges and universities were the main force of college and university human resources. In this paper, computer data analysis on need hierarchical structure of part Heilongjiang colleges and universities and difference...
The construction and improvement of teaching evaluation system is a very important part of teaching work in recent years. Along with the constant development of network-based study, a comprehensively scientifically and objective evaluation is increasingly important. To establish an evaluation system of network teaching is the needs of scientific management of teaching quality. Moreover, the study...
A preliminary method has been provided in designing composite blades, with requirement to meet the ultimate- and buckling-strength criteria. This method lies in examining the sections alone and focuses on getting the number of plies required to meet the criteria mentioned before. In recent years, with the concept of load alleviation and twist-coupled, the coupling between degrees of freedom, such...
In the paper,we studied the KOH activation method of PAN-based activated carbon fiber (ACF) systematically,tested the adsorption property of ACF by iodine valve and benzene valve and produced ACF with excellent adsorption property.The surface area of PAN-ACF manufactured by better technology was 1689.58(m2/g),the volume of pore was 0.55 ml/g,the average inside diameters was 0.65 nm.
Due to a serious shortage of the coal source for Tonghua area, power plant needs technology transform on 2times1025 t/h boiler to achieve mix-burning with lignite to the maximum extent and burn independently local poor bitumenite. Mixing the hot flue gas from reversing chamber into drying medium of the milling system and adding conditioning wind to hot air pulverized coal feeding system, the technology...
The increasing demand for paper in Asia is being met by the use of Eucalyptus urophylla to a large extent. However, some pulp mills may be forcedly closed because the Eucalyptus urophylla chips contain extractives severely enough to pollute the water. In this paper, the chemical components in the benzene/ethanol extractives of Eucalyptus urophylla chips were isolated and identified by Py-GC/MS to...
Mining with backfill is one of main issues of green technique in coal mine. Early strength of backfill material is a key to backfill mining technique. The influence of cementing material type, density of slurry and content of sialite on early strength of paste-like backfill material is studied experimentally. The result shows that strength of backfill material with sialite is higher than that of backfill...
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