Entity

Time filter

Source Type


Ma L.,Henan Institute of Product Quality Supervision and Inspection | Wang Y.,China Institute of Technology | Liu F.,China Institute of Technology | Chen L.,China Institute of Technology
Proceedings - 2012 4th International Conference on Multimedia and Security, MINES 2012 | Year: 2012

An instruction-words based software birthmark is proposed by applying the idea of document copy detection technology based on word frequency. The birthmark extraction algorithm consists of two steps. Firstly, an instruction-word library is established by taking statistic on instruction combinations of program samples, and then instruction-words are extracted according to the instructionword library. The birthmark is composed of instruction-words and their frequencies. In order to ensure that the birthmark has a better performance, this paper analyzes several forms of instruction-word frequency vectors. Then the form transformed with instruction-words of the one program as benchmark is selected to calculate birthmark similarity with vector cosine. To evaluate the performance of the birthmark, nearly ten thousand Java class files are gathered to establish an instruction-word library, which contains about fifty thousand instruction-words. By comparing 28 pieces of Java software, the experimental results indicate that the birthmark has good credibility and general resilience. © 2012 IEEE. Source


Chen F.,Henan Institute of Product Quality Supervision and Inspection
Naihuo Cailiao/Refractories | Year: 2013

The carbon free unfired corundum-mullite slide plates were prepared using tabular corundum, mullite, α-Al2O3 micropowder, Al powder, Si powder, SiC powder and new type binder as main starting materials, and were practically used in many steel plants. Effects of Al powder additions (0,3%,6%,9%,12% and 15% in mass, similar hereinafter), Si powder additions (2%,4%,6% and 8%), and mass ratios of Al to Si (15:0, 12:3,9:6,7.5:7.5,6=9,3:12 and 0:15) on density, cold and hot strengths, thermal shock resistance and oxidation resistance of the slide plates were researched. The results show that: (1) with Al powder and Si powder additions increasing, the density, cold crushing strength, hot modulus of rupture, thermal shock resistance and oxidation resistance improve gradually, when Al powder and Si powder additions exceed 9% and 6%, respectively, the strength, thermal shock resistance and oxidation resistance increase slightly; (2) with Si powder addition increasing, the cold crushing strength changes a little, the hot modulus of rupture and thermal shock resistance increase gradually; (3) the developed slide plate can satisfy the requirement of 2-3 heats continuous sliding, and its application effect is superior to that of alumina-carbon slide plates. Source


Wang A.,Zhengzhou University | Wang A.,Henan Institute of Product Quality Supervision and Inspection | He M.,Henan Institute of Product Quality Supervision and Inspection | Zhang R.,Zhengzhou University | And 5 more authors.
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2015

Abstract A 64-atom special quasirandom structure (SQS) has been employed to model the A0.5B0.25C0.25D, i.e., the TixAl1 - x - yZryN with x=0.5 and y=0.25, coating alloys in rock salt structure. Elastic constants are calculated by an efficient stress-strain method. The presence of Zr in TixAl1 - x - yZryN weakens the directional (covalent) nature of the nearest bonds and decreases the hardness of coatings. Additionally, the increase of Zr content changes Zener's elastic anisotropy ratio (A) from (A>1) to (A<1), resulting in the alteration of spinodal decomposition from <100> to <111> direction. © 2015 Elsevier B.V. Source


Jia Y.,Henan Institute of Product Quality Supervision and Inspection | Yang Z.L.,Henan Institute of Product Quality Supervision and Inspection | Cheng X.T.,Henan Institute of Product Quality Supervision and Inspection | Nie J.R.,Zhengzhou University
Applied Mechanics and Materials | Year: 2013

In allusion to the management characteristics of the cement laboratory samples, this paper conducts introduction and comparative analysis on such four kinds of identification as inspection organization, traditional cement sample identification of corporate laboratory, paper-electronic tags and wireless monitoring devices. It shows that wireless monitoring devices are superior to the traditional sample identification and paper-electronic tags, and can achieve intelligent management of cement samples ensuring objective and fair inspection data. © (2013) Trans Tech Publications, Switzerland. Source


Jia Y.,Henan Institute of Product Quality Supervision and Inspection | Cheng X.,Henan Institute of Product Quality Supervision and Inspection | Wei D.,Henan Institute of Engineering
Applied Mechanics and Materials | Year: 2012

Test result of cement chemical composition was obtained from the participating laboratory through organizing and performing the cement proficiency test plan. After performing the robust statistical analysis to the result, the test proficiency of the laboratory is evaluated, the proficiency of each laboratory on chemical composition analysis and test is objectively reflected. © (2012) Trans Tech Publications, Switzerland. Source

Discover hidden collaborations