1. In modern HMDs, stereo pictures are standard, since the technique has become cheaper.

2. Typically, HMDs either have poor resolution or are too heavy.

3. The effects of hexamethyldisilazane(HMDS)to the stability of electrolyte and cycle performance of Li-ion battery were studied.

4. The first attempt at virtual reality used head-mounted displays (HMDs).

5. In HMDs, projectors feed real-time images to small screens attached inside a kind of helmet that the user wears.

6. In the beginning, HMDs often showed mono pictures, and the user's head movements were tracked.

7. Many of the details of the HMDS are classified, but NIITEK provides training at installations around the U.S. and in Afghanistan, said company spokesman Terrance Marsh.

8. The HMDs and the new image generators, now being integrated by the Army, are the result of a multiyear deal with Rockwell Collins to upgrade all 23 AVCATTs across the service.

9. This program was one of the first to use helmet-mounted displays, or HMDs,() and head-steered infrared devices on a tactical aircraft.

10. The comparison of improvement effect of chemical surface modification between HMDS ( Hexamethyldisilazane ) and DCDMS ( Dichlorodimethylsilane ) was investigated.

11. Eyepieces of the conventional style cannot meet the stringent requirements of HMDs for large field-of-view, compact size and light weight.

12. Using hexamethyldisilazane(HMDS) as stabilizer of Li-ion battery electrolytes, the influences of HMDS on the stability of electrolyte and electrochemical properties of Li-ion batteries were studied.

13. When a user releases the BOOM, another person can look at the same thing from the same perspective, which is an advantage over HMDs.