<input type="checkbox" class="ace" name="node_select" ng-model="item.F1" ng-checked="item.F1 === '1'" ng-true-value="'1'" ng-false-value="'0'" />
<input type="checkbox" class="ace" name="node_select" ng-model="item.F1" ng-checked="item.F1 === '1'" ng-true-value="'1'" ng-false-value="'0'" />