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Urbanization may cause increased exposure levels to polycyclic aromatic hydrocarbons (PAHs) and associated health risks for over half of the world’s population living in cities, but little evidence has shown a direct spatial relationship between urbanization and soil PAH pollution. Based on the monitored PAH concentrations in 188 topsoil (0–5 cm) samples in(More)
The efficiency and pressure shock of pulsating-flow hydraulic system always restrict the application of the technology in engineering. In order to study the system characteristics, a single-phase pulsating-flow hydraulic experimental platform is designed, and the transfer function, stability of closed-loop response characteristics and system error are(More)
Ziel ist die analyse der Neigungslage des Beckens im Liegen und im Stehen bzw. die Beobachtung der Stabilität der Beckenfläche als Bezugsfläche für die Acetabulum-Prothese-Transplantation. 72 Testpersonen wurden je nach Status ihres Pfannengelenks in 3 Gruppen eingeteilt: Gruppe 1 “mit gesundem Pfannengelenk”, Gruppe 2 “mit Arthritis” und Gruppe 3 “nach(More)
Quantum chemical calculations are performed to investigate the equilibrium C–COOH bond distances and the bond dissociation energies (BDEs) for 15 acids. These compounds are studied by utilizing the hybrid density functional theory (DFT) (B3LYP, B3PW91, B3P86, PBE1PBE) and the complete basis set (CBS–Q) method in conjunction with the 6311G** basis as DFT(More)
In order to evaluate the value of the ultrasonography in the diagnosis of tumor of the knee and its clinical implication, 67 patients with clinically suspected bone tumor of the knee were examined by ultrasound. The ultrasonographic characteristics of different bone tumors were studied and compared with the results of pathologic characters after operation.(More)
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