function ApplyInjection(injection, connection, modelPorts)
%SET_INJ 设置注入信号
%   
    [conn_type, conn_name] = SelectConnection(injection.tag, connection);
    if conn_type == 's' || conn_type == 'p'
        if conn_type == 's'
            ch = SelectPort(modelPorts.Software, conn_name);
        elseif conn_type == 'p'
            ch = SelectPort(modelPorts.Physical, conn_name);
        end
        SetPortSignal(ch, ConstructSignal(injection.time, injection.value));
        SetPortEnable(ch, injection.enable');
        if isfield(injection.option, 'through')
            SetPortThrough(ch, injection.option.through);
        end
        if isfield(injection.option, 'interpolation')
            SetPortInterpolation(ch, injection.option.interpolation);
        end
    end
end

function Signal = ConstructSignal(time, value)
    if length(time) == 1
        if time == 0
            Signal = value;
        else
           Signal = [0 0; time value]; 
        end
    else
        Signal = [time value];
    end
end