| 1. | In the past , the buy and hold strategy worked very well
在过去，买和持有的策略非常富有成效。 |
| 2. | Network programming algorithms for ground - holding strategy problem
空中交通地面等待问题的网络流规划模型 |
| 3. | Airlines timetable programming method based on ground holding strategy
基于地面等待策略的航班时刻规划方法 |
| 4. | Buy and hold strategy
囤仓策略 |
| 5. | Abstract : considering the restriction of multiple airport and airspace capacity , multiple unit ground holding strategy problem with deterministic capacity is studied , including the mathematical model and a new algorithm based on heuristic method and artificial intelligence
文摘:在单机场受限地面等待策略问题的基础上，研究了确定容量条件下的多元受限地面等待策略问题，建立了数学模型，提出了一个启发式和专家系统相结合的流量管理新算法。 |
| 6. | By comparing the return of moving average , predicted by neural networks , rule to simple moving average rule and buy and hold strategy , our trading system shows good performance . it could beat both the simple technical analysis method and the buy and hold strategy
同时，根据本文提出的简单投资操作机制，结合预测分析，对随机选取的个股2002年数据进行了实际投资检验，与采用简单移动平均的一般技术分析手段和采用买入持有投资机制的投资情况进行对比。 |
| 7. | Simulation comparisons verify the superior performance of the tri - state pwm technology . experimental results indicate that the current - controlled tri - state pwm switching power amplifier based on sample - hold strategy has high frequency bandwidth and fast dynamic response in a wide load range , which can well meet the demands of high - speed magnetic bearing
仿真结果验证了电流三态调制技术的优越性能；实验表明本文研制的基于采样-保持策略电流三态调制开关功放具有结构简单、效率高、纹波小、电流动态响应快、频带宽、受负载影响小等优点，能很好地满足高速磁轴承的要求。 |
