The utilization of a data fusion approach to investigate fingerprint profiles of dark tea from China's different altitudes.

Dark tea refers to a kind of post-fermented product, and its quality and price vary owing to the distinct altitudes at which it grows. In this study, a novel method based on high performance liquid chromatography with a diode-array detector (HPLC-DAD) and an evaporative light scattering detector (HPLC-ELSD) was proposed for the classification of dark teas from distinct altitudes in China. Through implementing a strategy fusing feature-level data to construct a combined dataset, the classification performance of dark teas from distinct altitudes in China was evaluated after preprocessing. The results suggested that, through the feature fusion strategy, the identification accuracy rate increased from <70% of a single detector to 76.923%. After the implementation of preprocessing, the identification accuracy rate was further improved. Typically, the model identification accuracy rate after short-time Fourier Transform (STFT) treatment reached 92.85%, and the AUROC value was higher than 0.84, exhibiting a favorable generalization ability. This study provides a new thinking for the identification technology of dark teas from different altitudes in China.

Neglected Tarlov cysts: a case of a Tarlov cyst with spermatorrhea.

BACKGROUND: Tarlov cysts are a commonly misdiagnosed condition, which can present with many rare symptoms. We report a case of a Tarlov cyst with spermatorrhea and review the pertinent literature. CASE PRESENTATION: A 42-year-old male patient had a history of spermatorrhea for > 10 years, but was incorrectly diagnosed as the patient and the doctors consistently mistook the symptoms for a genitourinary disease. Magnetic resonance imaging showed that two cysts in the sacral canal. The diagnosis was Tarlov cyst. We performed surgery to remove the cyst and the symptoms of spermatorrhea disappeared after the operation. CONCLUSIONS: This case demonstrates that orthopedics and urologists should improve their understanding of Tarlov cysts to avoid misdiagnosis and mistreatment.

[A study on the variation of goiter rates, urinary iodine and household salt iodine intake among children in West China].

OBJECTIVE: To study the factors leading to the variation of children's total goiter rates, urine iodine and salt iodine in West China. METHODS: Design effect (DEFF) was used to evaluate the variation of indicators. RESULTS: DEFF of children's total goiter rate was about 3.0 in 9 provinces, and the proportion was 75.0%. The DEFF of urine iodine was 1.0 - 3.5 in 6 provinces, and the proportion was 50.0%. The DEFF of intake rate of qualified iodized salt was over 3.0 in 11 provinces. The DEFF of covering rate of iodized salt was about 3.0 in 4 provinces. CONCLUSION: In order to provide scientific basis for IDD surveillance in China, other than bias due to methods of no-sampling, sample size should be further calculated in West China. Thus the main influencing factors of indicator variation could be measured with scientific and reasonable basis.