Novel valve spring blocking structure for generating pulsed waterjet was proposed, which belonged to interrupted type and purposed using in petroleum drilling. The characteristics and rock breakage performances of the pulsed waterjet were studied through experiments by changing its structural...

Extensive studies have been carried out on vertical or horizontal impact cutting because they are both high-efficiency rock breaking methods, but little attention has been paid to impact cutting with simultaneous vertical and horizontal impact loads. In this work, we conducted numerical...

The high growth of the automotive industry reveals the very bright future of this technology and its high penetration effects on the human society. No doubt that the random and volatile charging demand of these devices would affect the power grid optimal operation and scheduling which may be...

Knowledge brokers play a crucial role in open innovation. We use exponential random graph models and qualitative analysis of semi-structured interview data to contrast knowledge brokerage in three open innovation partnerships. Our analysis considers both tacit and explicit knowledge exchanges....

The macroeconomic policy environment affects the internal governance of microenterprises, which may provide opportunities for management to benefit from stock sales while decreasing its motivation to manipulate stock transactions. Using a sample of Chinese A-share listed companies from 2007 to...