Experimental demonstration of 9.6 Gbit/s polar coded infrared light communication system

A new inter-frame polar coded modulation scheme is proposed and experimentally demonstrated in an infrared light communication (ILC) system. The scheme utilizes the Monte Carlo (MC) method to jointly design an inter-frame polar code with 16-ary quadrature-amplitude modulation (16QAM) and orthogonal frequency-division multiplexing (OFDM). The indoor transmission of 9.6 Gbit/s 16QAM OFDM signal is experimentally achieved over a 3.2 km single-mode fiber and 0.8 m free space. The experiment results show that the proposed scheme employing a polar code of length 1024 and cyclic redundancy check aided successive cancellation list (CA-SCL) decoding with a list size of 2 resulted in no errors over 107 bits. Moreover, the proposed scheme requires negligible extra decoding complexity with respect to its classical counterpart, MC-constructed polar coded modulation. To the best of our knowledge, this is the first experimental demonstration of a polar coded modulation based infrared light communication system

A Turn-On Fluorescent Probe for Detection of Sub-ppm Levels of a Sulfur Mustard Simulant with High Selectivity

A new type of fluorescent probe capable of detecting a sulfur mustard (SM) simultant at a concentration of 1.2 μM in solution and 0.5 ppm in the gas phase has been developed. Owing to its molecular structure with a thiocarbonyl component and two piperidyl moieties integrated into the xanthene molecular skeleton, this probe underwent a highly selective nucleophilic reaction with the SM simultant and generated a thiopyronin derivative emitting intensive pink fluorescence. The distinct difference in electronic structure between the probe and thiopyronin derivative generated a marked shift of the absorption band from 445 to 567 nm, which enabled an optimal wavelength propitious for exciting the thiopyronin derivative but adverse to the probe. Such efficient separation of the excitation wavelength and tremendous increase in fluorescence quantum yield, from less than 0.002 to 0.53, upon conversion from the probe to the thiopyronin derivative, jointly led to a distinct contrast in the beaconing fluorescence signal (up to 850-fold) and therefore the unprecedented sensitivity for detecting SM species

The genotypes and geographic regions of <i>T. gondii</i> Chinese isolates.

<p>Panel A: a map of China to show the cumulative data of geographic distribution where the Chinese isolates of <i>T. gondii</i> used for genotyping were collected. The provinces and cities where <i>T. gondii</i> isolates were obtained and indicated by red dots and black dots, respectively. Red dots represent the locations (counties) where the isolates were collected in this work. Black dots indicate the locations (counties) where the isolates were collected in the early studies. SX: Shanxi province; SD: Shandong province; HN: Henan province; AH: Anhui province; JS: Jiangsu province; HuB: Hubei province; HuN: Hunan province; GD: Guangdong province; ZJ: Zhejiang province; FJ: Fujian province; YN: Yunnan province; QH: Qinghai province; GS: Gansu province; XJ: Xinjiang province; BJ: Beijing city; SH: Shanghai city. Panel B: a: the cumulative data of genotypes of <i>T. gondii</i> Chinese isolates. b: the genotypes of <i>T. gondii</i> isolates from human patients in mainland China. This is the first report of the genotype ToxoDB#204 from humans.</p

Multilocus PCR-RFLP genotyping of <i>T. gondii</i> from animals and humans in China.

a<p>μ−1 and μ−2 represent unique RFLP genotypes, respectively.</p

The medical data from patients with toxoplasmosis.

a<p>F, female; M, male;</p>b<p>IC, immunocompromised; HCC, hepato-cellular carcinoma;</p

Summary of mouse virulence of representative strains with differents genotypes from China.

<p>Summary of mouse virulence of representative strains with differents genotypes from China.</p