Abstract: After a first network device traces a clock of a second network device, when the first network device cannot trace the clock of the second network device, the first network device modifies a parameter value corresponding to a synchronization source selection parameter of the first network device to a first parameter value, where the first parameter value is superior to a parameter value corresponding to a synchronization source selection parameter of the second network device.

Abstract: Provided is a carbon dioxide fluidity control device comprising, a sample preparation tank, a high-pressure stirring unit, a reciprocating plunger pump and a booster pump, wherein the stirring unit comprises one or more high-pressure stirring tanks, each provided with an atomizing spray probe and a piston, wherein a discharge port of the sample preparation tank is connected to the atomizing spray probe via a plunger pump, which is connected to the piston to push the piston to reciprocate; the booster pump is connected to the high-pressure stirring tanks to provide supercritical carbon dioxide to the high-pressure stirring tank; and a discharge port of the high-pressure stirring tanks is connected to an oilfield well group. Provided is a carbon dioxide fluidity control method using the device, comprising mixing surfactants and nanoparticles with heated carbon dioxide, and injecting a microemulsion of supercritical carbon dioxide and nano-silicon dioxide into an oilfield well group.

Abstract: An anti-theft device for vehicle steering mechanism, such as a steering shaft or a transmission rod, having a rotatable shaft. The anti-theft device has a fixing member fixed on the vehicle body, a connecting member joined with a steering handle, a locking member controlled by code device, a movable member provided on the rotatable shaft, for moving along the shaft but not rotatable around it. The movable member can move between a first position and a second position under the control of the locking member. When in the first position the movable member is engaged with the fixing member while disengaged with the connecting member so that the shaft can not rotate. When in the second position, the movable member is engaged with the connecting member while disengaged with the fixing member so that the shaft can rotate. The anti-theft device according to the invention has double functions of disconnecting transmission of steering force as well as locking the shaft.