BEIJING (AP) — U.S. Treasury Secretary Janet Yellen and Chinese Premier Li Qiang expressed hopes Friday for better communication as Yellen appealed to Beijing not to let frustration over U.S. curbs on technology exports disrupt economic cooperation. Both governments used positive terms to describe Yellen's visit to China's capital, which was aimed at improving strained relations, and stressed the importance of U.S.-China economic ties. Yellen and Li announced no new plans for more high-level meetings to revive contacts that disputes over technology, security and other irritants have disrupted. Yet, Yellen is the latest of several senior U.S. officials traveling to…