Iterative solutions of three-dimensional electric fields and absorbed powers inside a human body illuminated by a horn-antenna annular phased array

IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)31573-1576IAPS

Crustal structure along the Zhenkang–Luxi deep seismic sounding profile in Yunnan derived from receiver functions

The crustal thicknesses and the Poisson's ratios under the seismic stations can be calculated by receiver function method with H-ҡ stacking effectively. But the stacking results are affected to some extent by the average crustal P-wave velocity. To eliminate this effect and get more accurate crustal structure along the Zhenkang–Luxi deep seismic sounding profile which lies in Yunnan Province, we calculate the receiver functions from the teleseismic events recorded by 11 temporary stations as well as 5 permanent ones along the profile and carry out the stacking with Vp obtained from the profile in this study. Our study shows that the crustal thicknesses along the Zhenkang–Luxi profile range from 34.8 km to 41.8 km with an average of 39 km. The crust is thicker in the middle part of the profile and thinner in both sides in general. Dramatic changes of crustal thickness about 3 km are detected across both the Lancangjiang fault and the Xiaojiang fault, which implies that these faults cut through the Moho. The lowest Poisson's ratio under the stations is 0.22 and the highest is 0.27 with the mean of 0.25, which is lower than the global average value 0.27 in the continental crust. It suggests that most of the crust along the profile lacks mafic component, but contains more felsic substance. The low Poisson's ratio also indicates that there is no satisfying condition for partial melting. We deduce that the material flow in the middle-lower crust in the southeastern margin of the Tibetan plateau may occur only in the north region of 24°N. Keywords: Receiver function, Crustal structure, Lancangjiang fault, Xiaojiang fault, Mid-lower crust flo

Freshness evaluation of grass carp (Ctenopharyngodon idellus) by electronic nose

A novel grass carp (Ctenopharyngodon idellus) freshness rapid evaluation method using electronic nose (EN) was proposed in this paper. Total viable counts (TVC) and gas chromatography-mass spectrometry (GC–MS) were examined. EN responses to grass carp samples stored at 4 °C were continuously measured for 8 days. Microbial growth model was developed based on modified Gompertz regression. Results of TVC and GC–MS provided freshness references for EN analysis. Principal component analysis (PCA) and stochastic resonance (SR) were utilized in EN measurement data analysis. PCA qualitatively discriminated grass carp samples in different freshness. SR output signal-to-noise ratio (SNR) eigenvalues (SNRmax) quantitatively discriminated freshness for all samples. Grass carp freshness evaluation model was developed by non-linear regression between SNRmax values and storage time. Validation experiments results demonstrated that the proposed grass carp freshness rapid evaluation method presented good forecasting accuracy. The proposed method is promising in aquatic product freshness analysis

Hemiboea albiflora, a new species of Gesneriaceae from Guizhou, China

Hemiboea albiflora X.G.Xiang, Z.Y.Guo & Z.W.Wu, sp. nov., a new species of Gesneriaceae from Guizhou, China, is described and illustrated. This species was previously listed informally as a variety of H. gamosepala, but it differs significantly from H. gamosepala by its 5-parted calyx from the base, longer peduncle, white corolla and longer pistil. Based on recent extensive observations, this new species is similar to H. cavaleriei var. paucinervis and H. subcapitata but differs from them by its longer petiole, larger involucre, white corolla and longer staminal filaments. The conservation status of this species is considered to be “Vulnerable” (VU) according to the IUCN Red List Categories and Criteria

Hemiboea albiflora, a new species of Gesneriaceae from Guizhou, China

Hemiboea albiflora X.G.Xiang, Z.Y.Guo & Z.W.Wu, sp. nov., a new species of Gesneriaceae from Guizhou, China, is described and illustrated. This species was previously listed informally as a variety of H. gamosepala, but it differs significantly from H. gamosepala by its 5-parted calyx from the base, longer peduncle, white corolla and longer pistil. Based on recent extensive observations, this new species is similar to H. cavaleriei var. paucinervis and H. subcapitata but differs from them by its longer petiole, larger involucre, white corolla and longer staminal filaments. The conservation status of this species is considered to be Vulnerable (VU) according to the IUCN Red List Categories and Criteria

Study on the basement structure in the southeastern North China by blasting seismic

Since the Mesozoic, southeastern North China Craton has experienced intense crustal thinning and lithosphere destruction. Some of the responses of the deep activity in the upper crust crystalline basement have been retained in a series of tectonic evolution. The study of the upper crust velocity structure, especially the properties of the basement interface, is of great significance for studying the tectonic evolution and seismic hazard in the southeastern part of North China. In this study, we selected Pg waves of the blasting seismic data in the southeastern part of North China in recent years, which reflect the west Shandong uplift, offshore sedimentary basins and the Tanlu Fault zone and the Sulu orogenic transition zone, to study the structural and seismological characteristics of basement in North China Craton. The results of this study showed as follows: First, the obvious lag of Pg wave arrival time in Dongying depression and North Jiangsu basin reveals the thick sedimentary, low velocity and unstable basement structure. Second, the advance Pg wave arrival time with high apparent velocity, which reflects the basement structure of the west Shandong uplift, indicates the thin sediments and the shallow basement. Third, combined with many geophysical phenomena, such as electrical structure, density structure and terrestrial heat flow, we hold that the Tanlu tectonic belt and the Sulu orogenic belt have experienced great lithosphere destruction and there is shallow crust and the thinnest lithosphere in the vicinity of the Tanlu fault zone. Keywords: Blasting seismic detection, Southeastern North China, Crystalline basement, Pg arrival tim