Aim To derive the error formulae for the algorithm of frequency response computation. Methods This algorithm was introduced theoretically, the error sources of the algorithm were analyzed and the formulae of the mai...Aim To derive the error formulae for the algorithm of frequency response computation. Methods This algorithm was introduced theoretically, the error sources of the algorithm were analyzed and the formulae of the main error were derived. Results The repeatability and stability of the processing results of the algorithm are better than those measured by 1250 Frequency Analysor. Conclusion The error formulae derived are theoretically right and practically valid.展开更多
China is seeking volunteers to participate in its second clinic trial of a new AIDS vaccine early next year, a leading Chinese scientist said On December 18, 2006.
A new method is presented to determine the full-range, uniaxial constitutive relationship of materials by tensile tests on funnel specimens with small curvature radius and finite element analysis(FEA). An iteration me...A new method is presented to determine the full-range, uniaxial constitutive relationship of materials by tensile tests on funnel specimens with small curvature radius and finite element analysis(FEA). An iteration method using FEA APDL(ANSYS parametric design language) programming has been developed to approach the necking constitutive relationship of materials. Test results from SAE 304 stainless steel at room temperature show that simulated load vs displacement curve,diameter at funnel root vs displacement curve, and funnel deformation contours are close to modeled results. Due to this new method, full-range constitutive relationships and true stress and effective true strain at failure are found for 316 L stainless steel, TA17 titanium alloy and A508-III stainless steel at room temperature, and 316 L stainless steel at various elevated temperatures.展开更多
A traditional Chinese medicinal capsule capable of curing HIV/AIDS has been put under clinical test with the approval of the State Food and Drug Administration.
A field test of the SiVo aid with a profoundly hearingimpaired listener who has a left corner audiogram had been carried out in China. The testing materials are Chinese intelligibility test lists including syllable li...A field test of the SiVo aid with a profoundly hearingimpaired listener who has a left corner audiogram had been carried out in China. The testing materials are Chinese intelligibility test lists including syllable lists and word lists which are all phonetically balanced. The speech illtelligibility tests were conducted under three different conditions: 1. The listener used the lip-reading only; 2. The listener used the SiVo aid alone; 3. The listener used both lip-reading and SiVo aid. The results show that: 1. The SiVo aid is good for transmitting the pitch contours and for increasing the tone intelligibility of Chinese and manner recognition rate; 2. Lip-reading can contribute to lexical tone perception and the duration information of tonemes may be used by the listener; 3. Polysyllabic words gain higher intelligibility increment than monosyllablic words do by using SiVo aid; 4. Some illterference between the SiVo aid channel and the lip-reading channel at word level maybe exist, and the training of continuous speech is emphasized for Chinese.展开更多
文摘Aim To derive the error formulae for the algorithm of frequency response computation. Methods This algorithm was introduced theoretically, the error sources of the algorithm were analyzed and the formulae of the main error were derived. Results The repeatability and stability of the processing results of the algorithm are better than those measured by 1250 Frequency Analysor. Conclusion The error formulae derived are theoretically right and practically valid.
文摘China is seeking volunteers to participate in its second clinic trial of a new AIDS vaccine early next year, a leading Chinese scientist said On December 18, 2006.
基金co-supported by the National Natural Science Foundation of China (No. 11472228)the Sichuan Youth Science and Technology Innovation Team Projects (No. 2013TD0004)
文摘A new method is presented to determine the full-range, uniaxial constitutive relationship of materials by tensile tests on funnel specimens with small curvature radius and finite element analysis(FEA). An iteration method using FEA APDL(ANSYS parametric design language) programming has been developed to approach the necking constitutive relationship of materials. Test results from SAE 304 stainless steel at room temperature show that simulated load vs displacement curve,diameter at funnel root vs displacement curve, and funnel deformation contours are close to modeled results. Due to this new method, full-range constitutive relationships and true stress and effective true strain at failure are found for 316 L stainless steel, TA17 titanium alloy and A508-III stainless steel at room temperature, and 316 L stainless steel at various elevated temperatures.
文摘A traditional Chinese medicinal capsule capable of curing HIV/AIDS has been put under clinical test with the approval of the State Food and Drug Administration.
文摘A field test of the SiVo aid with a profoundly hearingimpaired listener who has a left corner audiogram had been carried out in China. The testing materials are Chinese intelligibility test lists including syllable lists and word lists which are all phonetically balanced. The speech illtelligibility tests were conducted under three different conditions: 1. The listener used the lip-reading only; 2. The listener used the SiVo aid alone; 3. The listener used both lip-reading and SiVo aid. The results show that: 1. The SiVo aid is good for transmitting the pitch contours and for increasing the tone intelligibility of Chinese and manner recognition rate; 2. Lip-reading can contribute to lexical tone perception and the duration information of tonemes may be used by the listener; 3. Polysyllabic words gain higher intelligibility increment than monosyllablic words do by using SiVo aid; 4. Some illterference between the SiVo aid channel and the lip-reading channel at word level maybe exist, and the training of continuous speech is emphasized for Chinese.
