被动系统

The acoustics system is based on AQS901 sonar system, compatible with BARRA, SSQ-41 and SSQ-53, TANDEM, and Ultra active and passive sonobuoys.

声纳系统核心为AQS901声学系统，可兼容巴拉，SSQ-41，SSQ-53，坦登和奥察等主动和被动声纳浮标。

Instead, they were able to find a certain region which was most suitable for living in the natural ecological system in the process of cultural building, and then to build and protect the national habitat which belonged to their own nationality according to their understanding of their nationality's culture.the protection of ecologic was mainly realized by cultural restraint and balance, it had the features of unconsciousness, remoteness ,passivism and regionalism.exploring the features and functions of this kind of protection is good for deepening the awareness of national habitat and offering predecessor's experience and lessons to nowaday ecological protection

古代民族由于所处时空域的限制，不可能全面认识自然生态系统并自觉直接维护生态环境，而是在文化建构的过程中从所处的自然生态系统内人为地分割出一个最适合于本民族生息的区域，按照本民族文化的理解去建构并直接维护本民族特有的民族生境。对生态环境的维护，主要是通过文化制衡来实现的，它具有无意识性、间接性、被动性和区域性。探讨这种生态维护的特点及功效，有助于深化对民族生境的认识并为今天的生态维护提供前人的经验教训。

This paper set up a hardware in the loop and real-time simulate test system of 1/4 vehicle suspension.

摘要本文构建了1／4汽车半主动悬架的硬件在环实时仿真试验系统，将S函数编程实现的线性滤波和谐波叠加模拟产生的随机路面激励用于该试验系统中，进行了时间域内路面不平度、磁流变阻尼器、被动悬架和半主动悬架的仿真及试验，采用性能评价指标对悬架性能进行评价，比较优劣。

This paper set up a hardware in the loop and real-time simulate test system of 1/4 vehicle suspension.

本文构建了1／4汽车半主动悬架的硬件在环实时仿真试验系统，将S函数编程实现的线性滤波和谐波叠加模拟产生的随机路面激励用于该试验系统中，进行了时间域内路面不平度、磁流变阻尼器、被动悬架和半主动悬架的仿真及试验，采用性能评价指标对悬架性能进行评价，比较优劣。

The initiative and passive methods to decrease the vibration have been studied. The results of decreasing of vibration with the installing of hydraulic liners between the chocks and stand have been researched using the simulation software. The hydraulic liners can decrease or eliminate the vibration effectively.

研究了轧机垂直系统主动减振和被动减振的措施和策略，并运用仿真分析手段，研究了轴承座与机架间采用液压衬板的减振效果，发现采用液压衬板可以很好地抑制轧机垂直系统自激振动的发生。

A real time signal acquisition and processing system for localizing and tracking helicoper with passive acoustic is introduced.

介绍了反武装直升机被动声定位跟踪系统中直升机噪声信号实时采集与处理系统的设计。

The low-power CX93510 encoder allows video streams to be captured and recorded simultaneously, and is targeted at products including motion sensors with low-cost passive infrared technology, intercoms, baby monitors, and IP network cameras.

该低功率CX93510编码器可同时完成视频流的抓取和记录，主要用于低成本的被动红外运动传感器、内部通话系统、婴儿监视系统和IP网络摄像机。

By establishing a model based on the law of infrared radiation transmission in atmosphere and the characteristics of infrared imaging system for the apparent contrast between the target and the background, and analyzing the model over two wavebands to formulate the distance measuring formula and the distance resolving power formula, a passive distance measurement method is proposed for aerial point target distance measurement.

提出了对空中点目标进行被动测距的方法。基于红外辐射在大气中的传输规律和红外成像系统的特性，建立了目标和背景的表观对比度模型。通过对两个波段上对比度模型的分析，推导出了测距公式和距离分辨率公式。理论分析表明，只要得到大气在两个波段上的消光系数，通过测量目标在两个波段、两个时刻上的目标表观对比度，即可计算得到目标距离和目标径向速度，而距离分辨率则取决于系统的对比度探测能力及相关参数。

Request is, must use when the general present and passive voice Through to Modbus the RTU model agreement and the wireless data acquisition system principle of work analysis, has designed based on the nRF2401 wireless data acquisition system automatic voice prompt pitch point.

要求是，要用一般现在时和被动语态）通过对Modbus RTU模式协议和无线数据采集系统工作原理的分析，设计了一个基于nRF2401的无线数据采集系统自动语音提示节点。

This system of another a characteristics is, the manifestation electric circuit is an serial static appearance show electric circuit, application moving first deposit the machine a can realize string- and, using 8 figures for receiving single-chip-machine sending outs tube manifestation type matrix, this provided the more friendly man-machine interface for the customer, the convenience proceed to the measured value observational, adopt the homologous operation.

本系统的另外一个特点是，显示电路是一个串行接口的串行静态显示电路，应用移位寄存器74LS164能够实现串-并的特点，用8个级联的74LS164来接收单片机发出的数码管显示字模，这为用户提供了更为友好的人机界面，方便对测量值进行观察，采取相应的操作。对于系统单片机的配置，我选用了被动串行模式。这是因为FPGA作为从属器件，主要是由单片机提供配置所需的时序，实现配置数据的下载。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。