Also, the author ’ s design strategy and creativity has been given in this paper. specifically, it includes : based on the feasibility analysis of the fit selection of control parameters in the aeration process, the aeration process of wastewater treatment of the joint - constructional complete - mixed activated sludge process has been aimed at in this paper. then, the state equations of the aeration process have been proposed in this paper, which is on the base of dissolved oxygen concentration ( do ) and discharge quantity of sludge ( qw ) as control variables, the concentration of bod and sludge as state variables. based on the present study on optimization control of wastewater treatment, the multivariable optimal control model with restriction factor has been presented in the paper with introducing modern control theory and system analysis into the field of activated sludge wastewater treatment,
具體包括:以完全混合、表面曝氣合建式活性污泥工藝的污水處理曝氣過程為研究對象,在闡述了曝氣過程式控制制參數選取可行性的基礎上,建立了以溶解氧濃度do和活性污泥排放量qw為控制變量,以曝氣池中有機物濃度s和微生物濃度x為狀態變量的活性污泥曝氣過程的基本狀態方程;運用現代控制理論的觀點和污水處理理論,在現有關于污水處理最優控制問題研究的基礎上,建立了有約束條件多變量能耗最
小數學模型,該數學模型是以有機物排放總量和狀態變量的末值條件
作為約束條件,曝氣過程的能耗最
小作為目標泛函;採用增廣拉格朗日乘子法對最優控制問題進行轉化,並對應用極大值原理求解能耗最
小這一最優控制問題進行了詳細的解析;引入約束運算元,應用具有控制約束的共軛梯度演算法對能耗最
小這一最優控制問題進行求解,並進行模擬實驗驗證。
Luyang corporation, developing from a small rural factory into a modern enterprise after 20 years ’ efforts, has become the leader of ceramic fiber industry in our country with a international fame and great influence. it is also the main drafter unit of national standard of ceramic fiber and the stress high - new technology enterprise in national grade
本文以山東魯陽股份有限公司為案例,深入剖析、總結了一個
小作坊式的鄉鎮企業,經過近20年的奮斗,發展成為全國陶纖行業的龍頭企業,並在世界上具有一定知名度和較大的影響力,陶瓷纖維國家標準的主起草單位和國家重點高新技術企業的成功經驗。
Writing : write the words, phrases, sentences and paragraphs from memory. practice writing some informal essays or some short compositions
寫:默寫課內單詞、詞組、句子、段落。寫一些英語隨筆或
小作文。
Mcguire, william j. ( 1993 ). “ the poly - psy relationship : three phases of a long affair ”, iyengar, shanto ; mcguire, william j. explorations in political psychology. duke university press
政治心理學是一個與精神病和心理學相關的
小作品。你可以通過擴充其內容。
A significantly greater number of patients treated with dapsone gel had " no acne or minimal acne on completion of treatment, " the authors note
有許多用氨苯碸凝膠治療的患者在治療后痤瘡消失或已經縮
小到很
小,
作者報道。
When the paper uses the optimization regulation, it divides the management time into " t " stages according to ten days to make up the decision having many stages of the reservoir ' s optimization regulation, and it takes the reservoir ' s retain quantity of water or retain status of water and confiscated quantity of water a s condition variable, takes the water quantity of drawing off or quantity of electricity as decision variable. when the confiscated quantity of water can be known or be forecasted in every stage during the period of management, that is to say the confiscated water process can adopt the determined process, we can make up determine dynamic plan model with many stages and take the minimal lacking water as objective function
在動態規劃方法中把水庫的整個調度期,按句劃分為t個時段,以水庫的蓄水量s或蓄水位z和入庫水量q
作為狀態變量,以水庫放水量q或電站出力n或發電量e
作為決策變量,構成一個多階段決策過程,當計劃調度期內各時段的入庫徑流量已知或可以預報,即入庫徑流過程可以採用確定性徑流過程時,分別按缺水量d最
小作為目標函數建立多階段確定性動態規劃數學模型。
The solution show that the upper structure reduces the internal forces of plate
算例結果表明上部結構剛度對基礎板的內力有減
小作用。
Children from 28 schools were selected, by arts kids, to work alongside a professional artist to produce work that was exhibited first in their local town centre. all the work has now been brought to london and the children involved will hear from hrh the prince of wales and take part in workshops led by quentin blake, and other professional artists and illustrators
Arts kids挑選了28所學校的學生,在專業藝術家的指導下進行創
作,
作品先行於當地市鎮中心展出,之後集中在倫敦,
小作家們將聽到威爾士王儲的講話,並參加由quentin blake及其他藝術家和職業插圖畫家帶領的工
作室。
With the increasing signal frequency and decreasing feature size of modern high speed integrated circuits, interconnect transmission line is playing an increasingly important role
隨著信號頻率的增加和現代高速集成電路尺寸的減
小,
作為相互連接裝置的傳輸線正在扮演著越來越重要的角色。
Relative risk ( rr ) was used as a measure of the effect of folic acid supplementation on the risk of stroke with a random effect model
採用相對危險度( rr )的大
小,
作為衡量葉酸補充治療在降低卒中發生危險有效性的指標。
A father and son in the mix plant business in green river, illinois, had been experimenting with a soft frozen dairy product for some time
這種食品是由一位父親和他的兒子在伊利諾州青河的一家
小作坊里製
作的,這倆父子試驗這種軟凝固乳製品已經有相當長一段時間了。
The still further analysis in connection with several actual examples reveals that the method can fairly accurately identify the numbers, sizes and action positions of the passing vehicles on the bridge in the state of sparse traffic volume, and can derive load under multiple vehicle action within the influential lines
結合實例的分析表明該方法能夠較精確識別稀疏交通狀態下車輛數量、大小、作用位置,並能推求影響線內多車作用下的荷載。