We develop the statistical mechanics of a pair of new ensembles called the constant shear strain ensembles that include the uniform dilation ensemble used frequently in computer simulations. We present a direct calculation of fluctuation formulas for the elastic constants, the specific heat, and the
thermal expansion tensor in these new ensembles. 我們新發展了一對被稱為「切向脅變為常數之系集」的統計力學。這些新系集包含了計算機模擬中相當常用的均勻擴張系集。我們直接推導出了在這些新系集中彈性系數，比熱，以及熱擴張張量的漲落計算公式。
