By using the Constrained Variable Metric method, an optimization design model of the cartridge is established, and created a computer program, and then worked out the optimized result.

采用了约束变尺度法建立了干扰子弹的优化设计数学模型，且编制了优化设计软件，计算出了所优化的结果。

youdao

The machine does not allow modifications to its ROM (because it has an O in the middle), but the team was able to use a technique called return-oriented programming to modify how the machine executes existing code, taking the bits they want and, ultimately, devising a way to re-program its behavior by simply inserting a cartridge into a slot -- presumably after blowing on it for good luck.

ENGADGET: Hang your head, Sequoia e-voting machine; you've been hacked again