In view of the weak isolation and shock absorption effect ordinary bearings at present, a new track damping negative-stiffness device was designed based on principle negative stiffness. The stiffness applied to base isolation, system proposed in which track-type NSD common layer were connected parallel. had characteristics clear force transmission, simple structure, self-resetting ability. theo...

We have investigated whether living muscle and nonmuscle cells can discriminate between microinjected muscle and nonmuscle actins. Muscle actin purified from rabbit back and leg muscles and labeled with fluorescein isothiocyanate, and nonmuscle actin purified from lamb brain and labeled with lissamine rhodamine B sulfonyl chloride, were co-injected into chick embryonic cardiac myocytes and fibr...

To assure seismic isolation performance against design and beyond basis earthquakes in the nuclear facility components, lead inserted small-sized laminated rubber bearings (LRB), which has a 10 kN vertical load, have been designed quasi-statically tested to validate their mechanical properties previous studies. Following this study, shaking tests of these full-scale LRBs are performed discussed...

The precipitation conce ntration degree (PCD) and concentration period (PCP) in the Liaohe River basin (LRB) from 1960 to 2020 were calculated depending on daily data derived meteorological stations. mutations of PCD PCP identified by sliding t-test, spatiotemporal evolution characteristics before after mutation point further analyzed. Cross wavelet transform (CWT) was used reveal influence fou...

Continuous girder bridges have been extensively constructed in China over the past 30 years, and these tend to experience severe damage under ground motions with velocity pulses. In current research, an innovative linear friction damper (LFD) is proposed mitigate seismic damages of continuous subjected near-fault motions. The OpenSees platform adopted establish numerical model a bridge region. ...

As a major threat to ecosystem functions and national food security, soil erosion also exerts an influence on the water quality in basins operation maintenance of hydropower plants. Existing discussions about trends focus mainly its variation mutation over time. Few studies have addressed spatial mechanism. In this research, Sen’s slope estimation was coupled with Mann–Kendall model explore spa...