空目标 meaning in English

null object

Schemas can also be found in the following additional locations when the schema has a non - empty target namespace
如果架构具有非空目标命名空间，在下列附加位置也可以找到架构：
Data obtained from an object with a null target device , such as most metafiles , is independent of the target device
从具有空目标设备的对象中获取的数据（例如多数图元文件）与目标设备无关。
In recent years , the worldwide researchers pay much attention to fourier telescopy . it is an active imaging technique that encodes the information in the temporal instead of spatial domain , then receives the speckle and deposed of it to reconstruction the object image . now , the high - resolution technique is under the condition of deeply researched
它是一种主动式干涉成像技术,这一技术通过时域内的相位的调制完成直线条纹对目标的扫描,从而达到对深空目标频谱的抽样,然后接收其散射回波,对回波信号进行处理,进而还原出目标的像。