一種分級超結(jié)構(gòu)換熱器網(wǎng)絡(luò)綜合優(yōu)化方法及其應(yīng)用

1、一種分級超結(jié)構(gòu)換熱器網(wǎng)絡(luò)綜合優(yōu)化方法及其應(yīng)用溫卿云1, 羅 行1, 姚平經(jīng)2, 楊杉杉3(1. 上海理工大學(xué) 動力工程學(xué)院, 上海 ; 2. 大連理工大學(xué) 化學(xué)工程學(xué)院, 大連 ; 3. 同濟(jì)大學(xué) 機(jī)械工程學(xué)院, 上海 )摘要: 對分級超結(jié)構(gòu)換熱器網(wǎng)絡(luò)模型的溫度計算得出了一種通用的精確解方法,同時得到了顯式解析解,并以這一解析解為基礎(chǔ),設(shè)計了以遺傳算法和模擬退火算法為主,結(jié)合最速下降法的混合遺傳算法,此外還在算法中引進(jìn)精英策略和結(jié)構(gòu)變異策略. 應(yīng)用實例的計算結(jié)果顯示了這一混合遺傳算法對于換熱器網(wǎng)絡(luò)的參數(shù)和結(jié)構(gòu)都具有良好的搜索能力.關(guān)鍵詞: 換熱器網(wǎng)絡(luò); 綜合優(yōu)化; 遺傳算法; 模擬退火算法Sy

2、nthesis of heat exchanger networks with a stage-wise superstructure modelWEN Qing-yun1, LUO Xing1, YAO Ping-jing2, YANG Shan-shan3(1. College of Power Engineering, University of Shanghai for Science and Technology, Shanghai , China; 2. College of Chemical Engineering, Dalian University of Technology

3、, Dalian , China; 3. College of Mechanical Engineering, Tongji University, Shanghai , China)Abstract: A new analytical method was applied to a stage-wise superstructure model for the heat exchanger networks, by which the stream temperatures in the heat exchanger networks can be calculated explicitly

4、 and the constraints of mixed integer nonlinear programming (MINLP) model can be reduced dramatically. Based on the present analytical solution, a genetic algorithm coupled with simulated annealing algorithm and hill-climbing algorithm was developed. The elite strategy and structure mutation strateg

5、ies were introduced in the algorithm, which enhance the structural search ability of the algorithm. Three examples from literatures were calculated with the proposed procedure, and the results show that the present hybrid genetic algorithm has a good ability for searching both parameters and structu

6、re.Key words: heat exchanger network; synthesis optimization; genetic algorithm; simulated annealing algorithm兩足步行椅機(jī)器人的設(shè)計與研究曹 曦1, 趙群飛2, 馬培蓀1(1. 上海交通大學(xué) 機(jī)械與動力工程學(xué)院, 上海 ; 2. 上海交通大學(xué) 電子信息與電氣工程學(xué)院, 上海 )摘要: 介紹了一種兩足步行椅機(jī)器人機(jī)械系統(tǒng)和控制系統(tǒng)的硬件設(shè)計,分析了載人兩足機(jī)器人與一般兩足機(jī)器人在安全性、載重量和干擾方面的不同. 并通過計算機(jī)仿真技術(shù)提高了設(shè)計的效率和可靠性,從而降低了系統(tǒng)級開發(fā)風(fēng)險.關(guān)鍵

7、詞: 步行椅機(jī)器人; 步態(tài); 兩足機(jī)器人Design and study of a biped walking chair robotCAO Xi1, ZHAO Qun-fei2, MA Pei-sun1(1. School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai , China; 2. School of Electronic, Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai , China)

8、Abstract: The mechanical and control system design of a new biped walking chair robot is introduced. To make system design more efficient and reliable, a lot of computer simulations are carried out.Key words: walking chair robot; gait; biped robot具有連續(xù)預(yù)防接種的雙線性傳染率SIQR流行病模型王賀橋, 周艷麗, 王美娟, 徐長永(上海理工大學(xué) 理學(xué)院

9、, 上海 )摘要: 研究了一類具有預(yù)防接種免疫力的SIQR流行病模型全局穩(wěn)定性. 找到了決定疾病絕滅和持續(xù)生存的閾值基本再生數(shù)s. 利用線性化和Liapunov-Lasalle不變集的方法,得到了各類評點的穩(wěn)定性結(jié)論,揭示了染病期、隔離項和接種對疾病發(fā)展趨勢的共同影響.關(guān)鍵詞: 流行病模型; 基本再生數(shù); 平衡點; 全局漸近穩(wěn)定性SIQR epidemical model with continuous vaccinal immunity and bilinear incidence ratesWANG He-qiao, ZHOU Yan-li, WANG Mei-juan, XU Chang

10、-yong(College of Science, University of Shanghai for Science and Technology, Shanghai , China)Abstract: The global stability of SIQR epidemiological model with continuous vaccinal immunity and bilinear incidence rates is discussed. The reproduction number for the model is found, which determines the

11、 existence of the infective disease. By means of linearization and Liapunov-Lasalle invaicant set theorem, the stable results of various equilibriums are obtained. The joint influences of quarantine period, infected period, and vaccinal immunity on the disease are exposed.Key words: epidemical model

12、; basic reproduction number; equilibrium; global stability鎢酸鉛晶體中摻雜陽離子的計算機(jī)模擬田東升, 張啟仁, 劉廷禹, 陳 騰, 張秀彥(上海理工大學(xué) 理學(xué)院, 上海 )摘要: 用缺陷化學(xué)方法討論了Nd3+、Th4+、Sb5+摻雜PbWO4(PWO)中可能存在的雜質(zhì)缺陷模型,用GULP軟件計算了不同雜質(zhì)缺陷的生成能. 計算結(jié)果表明, Nd3+和Th4+將占據(jù)PWO晶體中周圍的Pb位,對的電荷補(bǔ)償抑制了PWO晶體中420nm吸收帶. Sb5+在高濃度摻雜時將占據(jù)PWO晶體中周圍的W位,并由于占據(jù)W位所呈現(xiàn)的一價負(fù)電性補(bǔ)償?shù)恼娦?使孤立

13、的鉛空位增多,引起350nm吸收的減弱和420nm吸收的增強(qiáng).關(guān)鍵詞: PbWO4晶體; 摻雜機(jī)制; 缺陷簇模型; 模擬計算Computer simulation of cations doped lead tungstateTIAN Dong-sheng, ZHANG Qi-ren, LIU Ting-yu, CHEN Teng, ZHANG Xiu-yan(College of Science, University of Shanghai for Science and Technology, Shanghai , China)Abstract: The positions of the

14、 impurity ions of Nd3+, Th4+, Sb5+ in PbWO4(PWO) crystal are simulated by computer technology. The corresponding defect clusters energy is calculated. The defect chemistry and the formation of the defect clusters are discussed. The mechanism of the doping effects of Nd3+, Th4+, Sb5+ are studied. The

15、 calculation results show that the Nd3+ and Th4+ would occupy the Pb sites near , and restrict the 420 nm absorption band by compensating the electronegative charges of . When the PWO is doped with high concentration, the Sb5+ would occupy the W sites near , make the capture two holes more easily to

16、 form the colour center of 420 nm absorption. The conclusions are detailedly discussed.Key words: PbWO4 crystal; mechanism of doping; models of defect clusters; simulation calculation填隙氧離子對鎢酸鉛晶體光學(xué)性質(zhì)的影響及綠光起源的研究張秀彥, 張啟仁, 劉廷禹, 陳 騰; 田東升(上海理工大學(xué) 理學(xué)院, 上海 )摘要: 應(yīng)用GULP軟件按照能量最低原理確定了鎢酸鉛(PWO)晶體中填隙氧離子的位置,再用CASTER

17、軟件計算了PWO晶體和含有填隙氧離子的PWO晶體的總態(tài)密度、分態(tài)密度和吸收光譜. 計算結(jié)果表明,填隙氧離子的存在不會造成PWO晶體可見光區(qū)的顯著吸收; PWO晶體中的綠光中心可能起源于WO4+Oi.關(guān)鍵詞: PWO晶體; 電子態(tài)密度; 填隙氧; 綠光中心Study on effect of the interstitial oxygen ion on the spectral properties of PWO crystal and the origin of green luminescence bandZHANG Xiu-yan, ZHANG Qi-ren, LIU Ting-yu, C

18、HEN Teng, TIAN Dong-sheng(College of Science, University of Shanghai for Science and Technology, Shanghai , China)Abstract: The electronic structures and absorption spectra of PWO crystals containing interstitial oxygen ion were calculated using code CASTEP based on density functional theory with la

19、ttice structure optimized. It is shown that: the interstitial oxygen ion in the perfect PWO crystal doesnt cause any absorption in the visible region; the green emission of lead tungstate origin is closely related to the interstitial oxygen ion, and probably originates from the center of WO4+Oi.Key

20、words: PWO crystal; interstitial oxygen ion; green luminescence bandBoussinesq方程組的行波解研究李 紅, 孫紹榮, 楊得前(上海理工大學(xué) 管理學(xué)院, 上海 )摘要: 運用動力系統(tǒng)定性理論,提出一種分析非線性系統(tǒng)解的方法. 并以Boussinesq方程為例,避免了求解的繁瑣過程,得到解的幾何特性. 分析結(jié)果表明,在一定參數(shù)條件下, Boussinesq方程的相圖中存在孤波、扭結(jié)波以及周期波.關(guān)鍵詞: 孤立行波解; 周期行波解; 波的光滑性; Boussinesq方程Study on bifurcations of tr

21、aveling wave solutions of Boussinesq equationLI Hong, SUN Shao-rong, YANG De-qian(Business School, University of Shanghai for Science and Technology, Shanghai , China)Abstract: By using the qualitative theory of dynamical systems, a method is advanced to analyze the solutions of the non-linear syste

22、ms. Appling this method to Boussinesq equations, the geometry shapes of the equation solutions are obtained, and the fussy process of solving equations is avoided. It is also found that under certain parametrical conditions, different phase portraits of Boussinesq equations exist, including bifurcat

23、ions of solitary waves, kink waves and periodic waves.Key words: solitary traveling wave solution; periodic traveling wave solution; smoothness of waves; Boussinesq equations液體除濕空調(diào)系統(tǒng)的實驗研究柳建華, 王 瑾, 鄔志敏, 顧衛(wèi)國, 張廣麗(上海理工大學(xué) 動力工程學(xué)院, 上海 )摘要: 以實際液體除濕空調(diào)系統(tǒng)為對象,改變液體除濕空調(diào)系統(tǒng)中除濕器、再生器的輸入空氣、溶液的溫度、濕度、流量、濃度等參數(shù),研究輸入?yún)?shù)變化對

24、輸出參數(shù)的影響. 在優(yōu)化的系統(tǒng)運行參數(shù)條件下,改變供能熱源溫度,研究液體除濕空調(diào)系統(tǒng)整體運行時輸出參數(shù)的變化和系統(tǒng)制冷量、耗能量及COP值的變化規(guī)律. 實驗結(jié)果表明,當(dāng)再生熱源為90時,空調(diào)送風(fēng)溫度穩(wěn)定在21,熱力系數(shù)為0.6左右,基本能滿足舒適性空調(diào)的送風(fēng)要求.關(guān)鍵詞: 液體除濕空調(diào)系統(tǒng); 余熱利用; 實驗; 性能分析Experimental investigation on liquid desiccant air-conditioning systemLIU Jian-hua, WANG Jin, WU Zhi-ming, GU Wei-guo, ZHANG Guang-li(Colle

25、ge of Power Engineering, University of Shanghai for Science and Technology, Shanghai , China)Abstract: Based on the experimental research on the liquid desiccant air-conditioning system, the feasibility and economical efficiency of the system are studied when the parameters of temperature, humidity,

26、 flow amount, consistence etc. of the air and solution input into the dehumidifier and regenerator are changed. The results show that when the temperature of the re-generation is 90, the thermodynamic coefficient of the system is about 0.6, the supply air temperature of the air-conditioning system r

27、emains stable at 21, so that the air-conditioning system can meet the comfortable need of people.Key words: liquid desiccants air-conditioning system; waste energy applying; experiment; performance analysis噴霧制取天然氣水合物過程的特性劉道平, 潘云仙, 周文鑄, 胡漢華, 徐新亞, 楊群芳(上海理工大學(xué) 動力工程學(xué)院, 上海 )摘要: 考慮到水的霧化可以有效提高氣-水接觸面積,有助于提高水

28、合物生產(chǎn)速率,設(shè)計和建造了一個半間歇式霧流強(qiáng)化水合物實驗裝置,用于探索和揭示噴霧強(qiáng)化天然氣水合物制備過程的基本特性,包括制備水合物的形態(tài)特征,形成過程中參數(shù)的變化規(guī)律,以及系統(tǒng)初始壓力和初始水溫度對形成過程誘導(dǎo)時間的影響. 實驗結(jié)果證明,在半間歇式反應(yīng)器中,噴霧強(qiáng)化方式可以制取天然氣水合物,并能有效地縮短水合物形成的誘導(dǎo)時間. 水合物的制備過程中,噴霧的啟動會引起系統(tǒng)內(nèi)部壓力有短暫的升高.關(guān)鍵詞: 天然氣水合物; 噴霧; 實驗研究Performance of natural gas hydrate production process in a batch reactor with water

29、 sprayingLIU Dao-ping, PAN Yun-xian, ZHOU Wen-zhu, HU Han-hua, XU Xin-ya, YANG Qun-fang(College of Power Engineering, University of Shanghai for Science and Technology, Shanghai , China)Abstract: Considering the water spraying can effectively increase the contact area between gas and water and promo

30、te the hydrate production rate, a batch reactor with water spraying was built in order to experimentally investigate the forming performance of natural gas hydrate, the systems state parameters variation and its effect on induced time of initial pressure and water temperature. The results show that

31、the natural gas hydrates can be produced in this way, and water spraying can effectively reduce the induced time of hydrate formation. During the reaction process, the beginning of water spraying can cause the system pressure to increase temporarily.Key words: natural gas hydrate; water spraying; ex

32、perimental investigation氣體再燃燃燒器噴口流動特性冷態(tài)實驗研究周 托, 張忠孝, 烏曉江, 陶曉華, 陳 龍, 朱 明(上海理工大學(xué) 動力工程學(xué)院, 上海 )摘要: 以某350MW鍋爐為原型建立冷態(tài)模擬試驗臺,研究氣體再燃技術(shù)中再燃?xì)怏w和爐內(nèi)旋轉(zhuǎn)氣流的混合程度及氣體再燃條件下實驗爐內(nèi)的空氣動力場,并采用標(biāo)準(zhǔn)k-e 湍流模型對其進(jìn)行了數(shù)值模擬. 結(jié)果表明,不同的再燃風(fēng)速度對爐內(nèi)的空氣動力場有影響. 再燃風(fēng)速度過小時,再燃風(fēng)偏離射流軸線較早,不能射入爐膛旋轉(zhuǎn)氣流的中心部位;而當(dāng)再燃風(fēng)速度過大時,導(dǎo)致再燃風(fēng)射穿爐內(nèi)旋轉(zhuǎn)氣流. 以上兩種情況均不能對爐內(nèi)氣流起到很好的覆蓋效果,進(jìn)

33、而影響著再燃?xì)怏w和爐內(nèi)氣體的混合程度.關(guān)鍵詞: 鍋爐; 氣體再燃; 空氣動力場; 數(shù)值模擬Study on flow characteristics of nozzle in gas-reburning burnerZHOU Tuo, ZHANG Zhong-xiao, WU Xiao-jiang, TAO Xiao-hua, CHEN Long, ZHU Ming(College of Power Engineering, University of Shanghai for Science and Technology, Shanghai , China)Abstract: Accordi

34、ng to the prototypes of some 350 MW boilers, constant proportional cold mode experimental bench was established and mixability of reburning air and rotating gas in the furnace was mainly studied. The aerial dynamic field in analogue furnace was studied in terms of gas-reburning, and numerical simula

35、tion was made with standard k-e turbulence model. The results show different reburning air velocities have influenced on the aerial dynamic field. The lower the speed of reburning gas is, the earlier the reburning gas offsets the axis of jet stream, and cant rip into the center of the rotating gas i

36、n the furnace. On the other side, when the speed is excessively high, the reburning gas will shoot through the rotating gas in the furnace. Both things above will lead to the case that the furnace gas flow, cannot be covered and thus mixability of reburning air and gas in the furnace will be affecte

37、d.Key words: boiler; gas-reburning; aerial dynamic field; numerical simulation求解度約束最小生成樹的一種啟發(fā)式方法廖飛雄, 馬 良(上海理工大學(xué) 管理學(xué)院, 上海 )摘要: 針對網(wǎng)絡(luò)設(shè)計和優(yōu)化中度約束最小生成樹問題,提出了一種基于貪心思想的啟發(fā)式算法求解度約束最小生成樹. 在最小生成樹的基礎(chǔ)上,將超過度約束的頂點降低度數(shù)使之滿足度約束條件. 經(jīng)大量數(shù)據(jù)測試并與其他算法進(jìn)行比較,表明了該算法的有效性和通用性.關(guān)鍵詞: 度約束; 生成樹; 啟發(fā)式算法Heuristic algorithm for degree-const

38、rained minimum spanning treeLIAO Fei-xiong, MA Liang(Business School, University of Shanghai for Science and Technology, Shanghai , China)Abstract: For solving the problem of finding the degree-constrained minimum spanning tree (DCMST) in network design and optimization, a heuristic search method is

39、 proposed, in which based on minimum spanning tree, degrees of vertices over the constrained degrees are reduced to the required state. Series of numerical examples are tested and the results are compared with that of some other algorithms. Computational results show the effectiveness and generality

40、 of the method.Key words: degree-constrained; spanning tree; heuristic algorithm裝卸工人調(diào)配問題新解法及其證明寧愛兵1, 熊小華2, 馬 良1(1. 上海理工大學(xué) 管理學(xué)院, 上海 ; 2. 上海第二工業(yè)大學(xué) 計算機(jī)學(xué)院, 上海 )摘要: 闡述了現(xiàn)代物流技術(shù)中裝卸工人調(diào)配問題、裝卸工問題、限制情況下裝卸工問題及其數(shù)學(xué)模型,證明了裝卸工人調(diào)配問題與限制情況下裝卸工問題的數(shù)學(xué)模型是等價的. 通過分析裝卸工人調(diào)配問題的數(shù)學(xué)性質(zhì)得出該問題的一種新解法并給出其證明. 新解法給出了該問題的所有最優(yōu)解.關(guān)鍵詞: 裝卸工人調(diào)配問題

41、; 裝卸工問題; 整數(shù)規(guī)劃; 最優(yōu)解New solution and its proof of the loader scheduling problemNING Ai-bing1, XIONG Xiao-hua2, MA Liang1(1. Business School, University of Shanghai for Science and Technology, Shanghai , China; 2. College of Computer Science and Technology, Shanghai Second Polytechnic University, Shang

42、hai , China)Abstract: The loader scheduling problem, the loader problem, the restricted case of the loader problem and their mathematical models are introduced. A proof that the loader scheduling problem and the restricted case of the loader problem have the same optimal solutions is provided. The m

43、athematical properties of the loader scheduling problem are analysed and all optimal solutions for the loader scheduling problem are presented.Key words: loader scheduling problem; loader problem; integer program; optimal solution人體臍帶血單核細(xì)胞與冰晶間相互機(jī)械影響的研究肖 鑫, 陶樂仁, 習(xí)德成, 華澤釗(上海理工大學(xué) 動力工程學(xué)院, 上海 )摘要: 利用低溫顯微

44、鏡觀察了臍帶血單核細(xì)胞在降溫過程中與冰晶間的相互機(jī)械作用,比較了在不同保護(hù)劑情況下有無靜電場的降溫過程中,冰晶形成和生長以及由此引起的機(jī)械作用的變化. 結(jié)果表明,在臍血中的細(xì)胞與冰晶間存在一定的機(jī)械作用,靜電場的引入在一定程度上改變了冰晶的形成和生長特性,使其細(xì)化;不同的保護(hù)劑,由于其本身的化學(xué)機(jī)制不同,對冰晶的抑制影響也不同.關(guān)鍵詞: 臍帶血單核細(xì)胞; 機(jī)械作用; 低溫保護(hù)劑; 靜電場Microscopic study of the effect on the mechanical interactions between mononuclear cells of human cord bl

45、ood and ice crystalsXIAO Xin, TAO Le-ren, XI De-cheng, HUA Ze-zhao(College of Power Engineering, University of Shanghai for Science and Technology, Shanghai , China)Abstract: The mechanical interactions between mononuclear cells of human cord blood and ice crystals are tested with the cryo-microscop

46、e during freezing, under the condition of adhering different cryo-protective additives (CPA). The ice crystals formation and growth characteristics during freezing whether with an external static electric field or not are investigated so as to change the interaction manner between the cells and crys

47、tals. It is found that there exist certain mechanical interactions between the cells and crystals and the external static electric field may affect the formation and growth characteristics of ice crystals. It can make the crystals thinner to some extent. With different CPA, the restraining effect on

48、 the ice crystals is distinct due to the different chemical mechanisms.Key words: mononuclear cells of human cord blood; mechanical interaction; cryo-protective additive; static electric fieldPAC-MBR組合工藝處理城市污水廠出水的研究林紅軍1, 陸曉峰1, 王文浪2, 梁國明1, 高維玨1(1. 中國科學(xué)院 上海應(yīng)用物理研究所, 上海 ; 2. 哈爾濱工程大學(xué) 化工學(xué)院, 哈爾濱 )摘要: 采用平板式

49、膜生物反應(yīng)器(MBR)工藝處理城市污水處理廠的出水,考察投加粉末活性炭(PAC)對處理效果、膜污染和污泥特性的影響. 結(jié)果表明,系統(tǒng)在很低的有機(jī)負(fù)荷(MLSS可承受的TOC負(fù)荷為0.014kg/(kgd)下有機(jī)物去除率大于60%,-N去除率大于95%,濁度去除率約為92%,可維持30d左右. 平行實驗顯示,投加PAC極大地提高了系統(tǒng)對有機(jī)物的去除率,而對-N和濁度的去除無顯著影響;投加PAC能有效減緩膜生物反應(yīng)器中的膜污染,使膜污染緩慢發(fā)展階段的歷時時間延長了一倍多,并使膜過濾污泥的凝膠極化阻力和總阻力分別減小40.5%和17.4%;另外投加PAC改變了污泥特性,是使系統(tǒng)性能提高的主要原因.關(guān)

50、鍵詞: 活性炭; 膜生物反應(yīng)器; 膜污染Treatment of effluent from wastewater treatment plant with PAC-MBR processLIN Hong-jun1, LU Xiao-feng1, WANG Wen-lang2, LIANG Guo-ming1, GAO Wei-jue1(1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai , China; 2. Department of Chemical Engineering, Ha

51、rbin Enginering University, Harbin , China)Abstract: A submerged-flat membrane bioreactor with powdered activated carbon (PAC) addition was used in secondary effluent treatment. The performance of this hybrid system, the effect of PAC on removal efficiency of pollutants, fouling of membrane and slud

52、ge characteristics were investigated. It is found that more than 60% TOC, 95% -N and 98% turbidity in influent are removed under condition of a low TOC loading 0.014 kg/(kgd). Parallel experiments show PAC increases organic removals significantly however has no visible influence on -N and turbidity

53、removals. Meanwhile, at constant flux, the TMP (trans-membrane pressure) increasing rate of the membrane bioreactor system can be delayed by powdered activated carbon addition. Quantitative calculations show the polarization layer resistance and the total resistance of membrane are decreased about 4

54、0.5% and 17.4% respectively. Analyses were then made from various aspects such as sludge conformation, sludge viscosity and specific oxygen uptake rate to elucidate the major factors giving rise to performance of system.Key words: powdered activated carbon; membrane bioreactor; membrane fouling上海青浦城

55、區(qū)西北片河網(wǎng)調(diào)水的數(shù)學(xué)模型構(gòu)建與驗證黃遠(yuǎn)東1, 孫亞男1, 陳林興2, 孫建國2, 紀(jì)桂霞1(1. 上海理工大學(xué) 城市建設(shè)與環(huán)境工程學(xué)院, 上海 ; 2. 上海市青浦區(qū)水利技術(shù)推廣站, 上海 )摘要: 基于河道幾何特征以及污染物對流、湍動擴(kuò)散和混合稀釋的不同機(jī)制,構(gòu)建起模擬上海青浦城區(qū)西北片河網(wǎng)內(nèi)污染物濃度時空分布的二維數(shù)學(xué)模型;采用兩種不同的實際調(diào)水工況(先排后引和邊引邊排),對所建模型進(jìn)行了驗證計算. 結(jié)果表明,河網(wǎng)內(nèi)各取樣點的污染物濃度實測值與計算值都基本一致. 從而證明了所建模型具有工程適用性,可用于模擬上海青浦城區(qū)西北片的河網(wǎng)水質(zhì)調(diào)節(jié)過程.關(guān)鍵詞: 河網(wǎng); 水質(zhì)調(diào)節(jié); 數(shù)學(xué)模型; 數(shù)

56、值模擬Establishment and verification of mathematical model for improvement of water quality in a river network in the northwest part of Shanghais Qingpu urban areaHUANG Yuan-dong1, SUN Ya-nan1, CHEN Lin-xin2, SUN Jian-guo2, JI Gui-xia1(1. College of Urban Construction and Environmental Engineering, Uni

57、versity of Shanghai for Science and Technology, Shanghai , China; 2. Shanghais Qingpu Station for Development of Hydraulic Technology, Shanghai , China)Abstract: Based on the principles of convection, turbulent diffusion and mixing of pollutants, a two dimensional mathematical model was developed fo

58、r evaluating the temporal-spatial distribution of pollutants in a river network located in the northwest part of Shanghais Qingpu urban area. Two water transfer cases for water quality improvement were simulated with the model. The computed pollutant concentrations at five different sampling points agree well with the measured data and validate therefore the model.Key words: river network; water quality improvement; mathematical model; numerical sim