NEW YORK, June 14 (Xinhua) -- U.S. President Donald Trump's administration has directed immigration agents to stop making arrests at farms, restaurants and hotels, a policy shift amid concerns ...

stage(#) ：specifies the way to identify all efficiency slacks. The default is stage(2), meaning the t… ...

DEA-Solver Pro数据包络分析软件,最新版为 Version 15e。已将CRS（恒定规模收益）版本添加到NegativeData_SBM模型中。此外，对于Malmquist模型，添加了累积和调整后的Malmquist指数。在前面版本15a中，具有新功能Negative Data SBM，可处理通常在 ...

美国缉毒局 (Drug Enforcement Administration)和白宫全国毒品控制政策办公室 (White House Office of National Drug Control Policy)都指中国为北美芬太尼 (fentanyl)和相关 ...