The result of positioning precision test shows that the positioning precision of the GPS real time differential system based on GPRS has attained cm-level.

实际测试结果表明：基于GPRS的GPS实时差分系统达到了厘米级定位精度。

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In this paper, the principle of transit-time differential method of ultrasonic flow measurement is introduced along with the discussion of its advantages and disadvantages.

本文讨论了时差法成品油超声波流量计的基本原理、优缺点等。

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Based on measured data of micro silicon gyro and time-series theory, the AR model of gyro static drift is established, then the continuous-time differential equation is got.

利用微硅陀螺测量的数据，运用过程辨识理论和时间序列分析方法，建立了陀螺静态漂移的自回归（AR）模型，进而得到连续微分方程。

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Because of the time differential, he cautioned against drawing conclusions about overall Call of Duty sales until the end of 2012.

FORBES: 'Call Of Duty: Black Ops 2' Sales Don't Point To Franchise's Decline

Therefore, Kaplan says, find out the time differential between when a retailer places its orders with vendors and ultimately receives the merchandise in the store--the lead time.

FORBES: Shining Through On The Shelves

Members expressed concern about the redefinition of the working day, excessive management control, lack of recognition for part-time doctors and the differential treatment for consultants in their first seven years of practice.

BBC: Doctor split threatens NHS contract