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Dou M.-C.,Changzhou Entry Exit Inspection and Quarantine Bureau | Deng J.,Wuxi Entry Exit Inspection and Quarantine Bureau | Lai G.-Z.,Wuxi Entry Exit Inspection and Quarantine Bureau | Yao J.,Wuxi Entry Exit Inspection and Quarantine Bureau
Wool Textile Journal | Year: 2014

The down-proof property is one of the important properties of feather and down products, scientific and effective testing method and equipment are the key contents to research the down-proof property of fabrics. The paper describes the main methods of testing the down-proof property of fabrics: trumble test, rubbing test and impact test, and according to the Europen standard-impact test, a new impact test instrument is developed. The paper introduces the basic structure, the working principle and the design plan of the instrument, and compares the different laboratory test results to verify the feasibility of the instrument. The results show no significant difference between the test data of the laboratory, and it shows that the instrument can effectively test the down-proof property of fabrics. Source


Qian J.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhou Z.,Hohai University | Wang Y.,Hohai University | shao T.,Hohai University | Zhang J.,Hohai University
Applied Mechanics and Materials | Year: 2013

In order to measure the magnetic field around electronic products, household appliances and industrial electrical equipment, this paper puts forward a new method which makes use of electromagnetic coupling design based on three-axis electromagnetic leakage. This method can overcome the disadvantage of traditional single-axis measurement which needs to get the total magnetic field after several times' measurement. This paper designs three-axis electromagnetic leakage detector for circuit measurement, which is proved to be correct after circuit measurement experiment. It can easily detect 30-2K Hz leakage magnetic field of low frequency generated from electrical appliances products.Introduction. © (2013) Trans Tech Publications, Switzerland. Source


Shen W.,Jiangsu Entry Exit Inspection and Quarantine Bureau | Cao X.,Changzhou Entry Exit Inspection and Quarantine Bureau | Liu Y.,Jiangsu Entry Exit Inspection and Quarantine Bureau | Zhang R.,Jiangsu Entry Exit Inspection and Quarantine Bureau | And 4 more authors.
Chinese Journal of Chromatography (Se Pu) | Year: 2012

A method was established for the determination of 17 pyrethroid pesticide residues in vegetables using QuEChERS (quick, easy, cheap, effective, rugged and safe) clean-up method and gas chromatography-mass spectrometry (GC-MS) with negative chemical ionization (NCI). The pyrethroid pesticides in the sample were extracted with acetonitrile. After QuEChERS clean-up with a mixture of primary secondary amine and graphitized carbon black packings, the extract was analyzed by GC-NCI-MS in selected ion monitoring (SIM) mode. An isotope internal standard of cypermethrin was employed to the quantification. The limits of quantification ranged from 0 02 to 5 μg/kg. The recoveries of the pyrethroid pesticides spiked in three different matrixes (peas, broccoli and Chinese onion green) at four spiked levels of 10, 20, 30 and 100 μg / kg were from 71 0% to 139 0%, and the relative standard deviations were less than 12 8%. This method can be used as a conclusive evidence method of the 17 pyrethroid pesticide residues in vegetables. Source


Qian J.S.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhang J.B.,Hohai University
Applied Mechanics and Materials | Year: 2014

With more and more electronic products used in daily life, as well as people attach great importance to our survival environment, people are more and more concerned about electromagnetic leakage pollution generated from electronic products. So the study of electromagnetic leakage detector that can rapidly and accurately detect the electromagnetic leakage in electronic products is significant. In this paper, we design a fast and effective 3-D electromagnetic leakage detector, which using three hollow induction coils which are mutually vertical between each other to obtain the intensity of electromagnetic field. With this instrument, the intensity in three directions can be tested at the same time. Tests revealed that electromagnetic leakage detector can easily measure the 3-D intensity of electromagnetic leakage generated from low frequency electronic products. It provides an important basis for inspection department to detect electromagnetic leakage in electronic products. © (2014) Trans Tech Publications, Switzerland. Source


Song X.,Changzhou Entry Exit Inspection and Quarantine Bureau | Zhou Y.,Changzhou Entry Exit Inspection and Quarantine Bureau | Li L.,Shanghai Institute of Technology
Progress in Chemistry | Year: 2014

Core-shell metal-organic frameworks (MOFs) composed of MOFs as core (or shell) and another material, such as MOFs, carbon, inorganic compounds and organic polymers, as shell (or core), are a typical class of multifunctional MOFs composites. Because of the combination of the properties of core and shell materials, core-shell MOFs have better performances, such as increasing framework stability, selective separation and gas sorption, than the core or shell materials. Therefore, core-shell MOFs have high potentials for industrial applications. In this paper, the research progress of core-shell MOFs in recent years is reviewed. Synthesis methods and applications of variously structural core-shell MOFs, such as MOF@MOF, MOF@carbon, metal oxide@MOF, and polymer @MOF are introduced. Besides, the future development of core-shell MOFs is prospected. Source

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