The main reason is that the accurately repeated prediction of wheel rail contact force is very difficult because it is related to many factors such as the contact stiffness, the rail defect shape and depth, the vehicle weight and suspensions, the track parameters.
Yet it has been pulled along by exports, and despite repeated predictions, household spending has failed to take off.
At the media event, Apple executives repeated predictions that the iPad would hasten the end of the reign of personal computers in American homes.
Despite repeated predictions of economic doom from industry groups when significant protection legislation has been passed, those industries have endured and the economy has continued to grow.
Yesterday, he toured an overwhelmingly Hispanic section of the Bronx, despite pollsters' repeated predictions that most Latinos in the city will back the Bronx borough president, Fernando Ferrer, a Democrat, for mayor.
Three years into a five-year term, Mr. Zardari is showing an ability to survive politically despite repeated predictions of his government's collapse.
The Tory peer declines to join criticism of Lynton Crosby, the Australian strategist running the Tory campaign, whose repeated predictions that the party would move ahead in the polls have failed to materialise.
The proportion of people cycling to work across England and Wales stayed more or less static over a decade, analysis of census data has shown, despite big rises in bike commuting in major cities and repeated predictions that Britain was on the way to becoming a cycling nation.
It is also possible to browse compounds in the data set and to repeat predictions using the raw data contained in the archive.
And President Trump's repeated predictions that the economy will grow at 4%to6%6%? "It's not going to happen," Shulman said.
