These man - made systems include showers , spa pools , fountains , and air conditioning cooling towers 這些系統(tǒng)包括淋浴器、礦泉池、噴泉以及空調設備的冷卻水塔。
The reservoir is the most important man - made system for storing water . it has economic function , social function and environmental function 水庫是水資源系統(tǒng)中最重要的人造蓄水體系,具有經(jīng)濟功能、社會功能和環(huán)境功能。
Like any man - made system , pki is dependent on trust , accountability , and the rules that define how to achieve these goals - don t let all the high - tech cryptography fool you 象任何人造系統(tǒng)一樣, pki依賴于信任、責任以及定義如何達到這些目標的規(guī)則不要讓所有這些高技術密碼術迷惑您。
Deds theory reflects dynamical law of all kinds of man - made systems . with going deep study , people start knows a few important problems w hich discrete event interacting with continuous variable that so called hybrid system 離散事件動態(tài)系統(tǒng)( deds )理論是一類新的系統(tǒng)理論,反映了各種人造系統(tǒng)運行的內部規(guī)律。
For those biological signals like echo of bat or whale , as well as man - made system signals like radar or sonar signal , the instantaneous frequency of signal component contains important information and could be used for signal model parameters extraction . so that the proper choose of transformed domain and signal characteristic extraction method is of crucial important . the ridge extraction method used for signal characterization was first proposed in the 1990s , it ' s based on the study of the phase of the wavelet ( or other linear ) transform 對于許多實際的信號,如蝙蝠發(fā)出的超聲波、鯨魚的叫聲等生物信號,以及雷達、聲吶等人造系統(tǒng)產(chǎn)生的信號而言,信號瞬時頻率的變化規(guī)律反映了信號重要的特征,并且也是信號模型中關鍵的參數(shù),因此選擇合適的變換域提取信號的瞬時頻率信息,并選擇合適的方法對信號進行重建是很重要的問題。
With the quick development of science and technology , the extensive apply of information handling , computer communicating , robot controlling , and productive process automating , the systems that people meet are large scale , abundant content and complex phenomenon . a lot of man - made systems have appeared which reflect science and technology trend in the area such as communication , manufacture , traffic , military and productive process . it ' s not convenient to describe these systems with differential equations or difference equations 在通信、制造、交通、軍事、生產(chǎn)過程等領域相繼出現(xiàn)了一批反映技術發(fā)展方向的人造系統(tǒng),例如通信和計算機網(wǎng)絡、計算機集成制造系統(tǒng)( cims ) 、現(xiàn)代交通系統(tǒng)、軍事指揮系統(tǒng)、工業(yè)生產(chǎn)的控制與調度系統(tǒng)等,這些系統(tǒng)不便于用微分方程或差分方程描述。