“They claim we are free to practice our religion but in fact they keep pulling the reins tighter and tighter so we can hardly breathe,” said a 22-year-old monk from Qinghai Province, who like many Tibetans keeps banned pictures of the Dalai Lama in his room and on his cellphone.

Senior officials have trumpeted the new approach, which includes the distribution of one million national flags and portraits of Mao Zedong and other party leaders — with a requirement that they be displayed at homes and monasteries. “Temples have undergone a delightful change since the new management methods were put into place,” Xinza Danzengquzha, a top Tibetan official, said this month in Beijing.

Such measures, however, may be having the opposite intended effect. Robert Barnett, director of the Modern Tibet Studies Program at Columbia University, said that the government’s more intrusive approach to monasteries, the heart of Tibetan society, is a reversal of self-management policies put in place in the 1980s. “History suggests it is unlikely to work,” he said.

The antipathy, never far beneath the surface, is erupting into plain view with greater frequency. In the past week, several protests have broken out, including two in Qinghai Province that were led by students angry over the introduction of Chinese-language textbooks for subjects like chemistry, math and geography. In January, exile groups say 31 people were shot, at least one fatally, when police officers opened fire on demonstrators in Drango County, in Sichuan Province. In Diru County, in the Tibet Autonomous Region, 20 of the 22 monasteries have been closed, according to the Tibetan Center for Human Rights and Democracy.

Spasms of unrest have coursed through modern Tibetan history with some regularity since 1959, when the Dalai Lama fled to India after a failed uprising. Between 1987 and 1989, the region was rocked by protests that were brutally crushed. The most recent crackdown began in March 2008, when rioting in Lhasa, the Tibetan capital, led to the death of at least 19 people, most of them Han Chinese. In the weeks and months that followed, exile groups say a far greater number of Tibetans died.