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oxidizer n.【化學】氧化劑。

oxime

The simulations results show that the spoiler is available to make the fuel and the oxidizer coming from the former to stay in the cavity for a long time , to let the fuel and oxidizer mix and burn completely . since there is a high temperature zone forming by vortex in the middle of the motor , it required a restricted thermal protection . the plate with holes decreased the vortex function in the cavity , which could not promote the combustion efficiency , but to decrease temperature in the cavity and be benefit to thermal protection of the wall 計算結果分析表明:擾流板可以使燃料和氧化劑在擾流腔內的滯留時間加長,促進燃料與氧化劑的摻混燃燒,提高燃燒效率,但由于渦流在發動機的中間部位形成了高溫燃燒區域,致使局部燃料和絕熱層燒蝕速率增大,加大了熱防護的難度;孔板結構減弱了擾流腔內回流區的漩流作用,不能增加推進劑燃燒效率,但可以使擾流腔內的溫度降低,給壁面熱防護帶來好處。

Abstract : combined with fundamental characteristics of in - situ leaching mining , this paper presents primary factors influencing the reation rates , such as lixivant concentration , oxidizer , porosity , permeability , seepage volocity , structure of ore , minerals of competition , etc . . the factors which influence the reaction rates of in - situ leaching have been discussed 文摘:結合原地浸出工藝的特點,總結提出了影響原地浸出反應速率的主要因素,并就溶浸劑濃度、氧化劑、孔隙度、滲透系數、滲透速度,礦石的結構、構造及礦物的嵌布特征,競爭礦物等對原地浸出反應的影響進行了分析與討論。

Based on the previous studies , the research in this paper was carried out , mainly including two parts as follows : ( 1 ) anammox bacteria and aerobic ammonia oxidizers were detected in situ in 6 sediment samples taken from jiangsu province . molecular techniques , such as fish , pcr , dna cloning and sequencing etc . were used for this purpose . ( 2 ) the continuous cultivation of anammox bacteria from sediment samples were studied , which provides experimental basis for the bioaugamentation of eutrophicated sediment applying anammox process 本論文在前人研究的基礎上,開展了以下兩個方面的工作: ( 1 )采用分子生物學技術熒光原位雜交( fish ) 、多聚酶鏈式反應( pcr ) 、 dna克隆和測序等對采自江蘇省蘇州市、東太湖、新沂河等6個底質樣品進行了厭氧氨氧化菌和傳統氨氧化菌的原位檢測; ( 2 )探討了以底質作為接種體進行厭氧氨氧化菌富集培養的可行性,為天然底質環境中厭氧氨氧化過程的強化,富營養化底質微生物修復的可行性提供一定的依據。

The autonomous underwater vehicle which carries liquid oxidizer and liquid incendiary agent and uses the outside seawater as coolant request the oxidizer 、 incendiary agent and coolant can supply the power system according to accurate proportion and reasonable flow on any condition . the system should have small volume and light weight and should be easily realized . the system and control mode introduced in this article can fit these requirements well 控制或降低液壓系統油液的污染度和提高液壓元件的污染耐受能力是確保液壓系統可靠工作的兩個重要方面,本文分析了液壓柱塞泵所在系統油液污染特性一定時影響泵污染耐受能力的諸多因素,指出了在結構形式確定的條件下設計高污染耐受度液壓柱塞泵所要求的摩擦副材料與主要表面工藝

The ammonia - oxidizers were increased from 2 . 13 106 / g mlss to 6 . 28 108 / g mlss , while the nitrite - oxidizers were increased from 2 . 13 103 / g mlss to 6 . 28 106 / g mlss . after a month , most of the heteotrophic bacteria were washed out from the system . they nitrifying bacteria were prevalent in the enrichment system and were around 99 % in total bacteria 選取富含硝化細菌的活性污泥作為富集培養的對象,采用純無機培養基對硝化細菌進行定向富集培養,能在較短的時間內得到大量硝化細菌富集培養物,硝化細菌數約占總菌數的99以上。

The two methods correlation of ammonia - oxidizers and nitrite - oxidizers are 0 . 9593 and 0 . 9823 , respectively . compared with the conventional mpn method , int dehydrogenase method is more rapid , simpler , and easily operated . the detection periods were shorten from 4 weeks of mpn to 2 days . the int dehydrogenase is a pragmatic method for rapid detection of nitrifying bacteria 采用硝化細菌的偶氮鹽( int )還原計數檢測法對活性污泥的硝化細菌進行檢測,所得的結果與傳統的mpn ? griess法檢測值有著很好的相關性, int法檢測周期為2天,具有快速、簡便、操作容易等優點,是一種有推廣價值的硝化細菌快速計數檢測方法。

Then using kerosene as fuel , oxygen and compressed air as oxidizers , proof - of - principle experiments of pdre were successfully conducted the results show that the measured detonation wave pressures are close to theoretical values it also indicate that using kerosene as the fuel of pdre is feasible 采用航空煤油為燃料,氧氣和壓縮空氣為氧化劑,分別進行了兩相脈沖爆震火箭發動機原理性試驗,所測得的爆震波壓力接近充分發展的理想爆震波壓力,說明采用煤油作為脈沖爆震火箭發動機的燃料是可行的。

The authour investigate the dosing conditions and effect of the pac to the huanghe water - source , which includes the following four parts : the selection of the pac ; the confirmation of dosing scheme and effect of the pac ; the research of application of potassium permanganate in combination with pac ; the research of the pac ' s modification and the modified effectiveness . the experiment is mainly carried out on the pilot system in the jieyuan water plan of tianjin . the results of the reseach include the following : l ) the pac from zunhua plant is selected as the better carbon for the source water of tianjin through the experiment ; 2 ) through the pilot experiment we conclude that the pac ' s best adding point is the mixing tank and the better dose is 10mg / l , on which the codmn of filtered water can be decreased to 40 % and the effluent have no problem of odour and color ; 3the adsorbing experiment show that pac mainly adsorb the organic matters which molecular wt . , distribution between 500 and 3000 , and can adsorb organic matters whose molecular wt . , distribution are bigger than 6000 if the dose of it is adequent ; 4 ) pac together with potassium permanganate can remove the organic matter more effectively than each of them alone , and reduce the rising trend of turbidity of the flotation ' s effluent due to adding pac ; 5 ) the thesis made a research on the surface properties and the adsorbing capability of the modified carbon by oxidizer : the modified carbon with 20 % h2o2 can remove more organic pollutants than the untreated one by 12 % when we add a higher dose of coagulant ; 6 ) the modification of reduction and loading metal ions are also sttldied , and drow the following conclusions : the modified carbon with 5 % ammonia can enhance the organic matter ' s removal effectiveness by 10 % to the tianjin source water than the untreated one , and the modified one with loading metal ion remove the organic matters from the tianjin source water better ( 8 % ) than the untreated one due to the strong affinity betwween the humic acid and copper ion 本文的實驗主要是在天津芥園水廠的中試系統上完成的,論文的成果和結論主要包括: 1 )通過靜態實驗選定河北遵化活性炭廠生產的煤質炭為適合天津原水的炭種; 2 )中試實驗確定粉末活性炭的較佳投加點為混合池投加,較佳投加量為10mg l ,此時可使濾后水的cod _ ( mn )降低40 ,且可較好地控制濾后水的嗅味和色度; 3 )初步確定粉末活性炭對原水中有機物的吸附主要集中在分子量在500 - 3000范圍內,投量增大時可吸附部分分子量大于6000的有機物4 )中試實驗表明:粉末活性炭與高錳酸鉀聯用可取得較兩者單獨應用時對有機物更好的去除效果,且對因投加粉末活性炭而造成的氣浮出水濁度升高有一定的改善作用; 5 )研究并初步確定氧化改性對粉末活性炭表面性質和有機物的去除效果的影響:粉末活性炭的氧化改性會使其表面的酸性官能團大量增強,表面極性增加;經20的過氧化氫改性的活性炭在增大混凝劑投加量( fecl _ 3投量為15mg l )時對有機物的總體去除效果較原活性炭提高12 , 1次氯酸鈉改性活性炭對有機物的去除效果較原活性炭提高6 ; 6 )研究并初步確定還原改性、負載金屬離子對原水中有機物的去除效果的影響:經5氨水改性的活性炭可提高天津源水中有機物的去除率達到10 ;負載銅離子后的活性炭可提高對腐殖酸類物質的去除能力,一般可提高8左右。

Results showed that in the water body of xizi lake , annual average of culturable planktonic ammonifiers and nitrogen fixers were 510 and 236 cfu / ml , respectively ; ammonia oxidizers , nitrite oxidizers , nitrate reducers and denitrifiers were 8 . 5 , 16 , 587 and 16 mpn / ml , respectively ; inorganic phosphate solubilizing bacteria ( 1pb ) and organic phosphorus mineralizing bacteria ( opb ) were 89 cfu / ml and 37 mpn / ml , aerobic and anaerobic cellulose decomposers were 7 and 5 mpn / ml , respectively 水體中可培養異養細菌(氨化細菌)和固氮菌的年平均值分別為510和236cfu ml ,氨氧化細菌、亞硝酸氧化細菌、硝酸鹽還原菌和脫氮菌的數量分別為8 . 5 、 16 、 587和16mpn ml ;無機磷和有機磷分解菌分別為89cfu ml和37mpn ml ;好氧性纖維素分解菌和厭氧性纖維素分解菌只有7和5mpn ml 。

It is shown that when the exit area of secondary nozzle and the fuel / oxidizer ratio is fixed , the increase of mass flow rate of secondary flow lead to the decrease of velocity of mixed flow , and increase of total mass flow rate . the synthetical result of these two phenomenon cause the increase of thrust of rocket ejector , but the increasing magnitude is relatively small , indicating that these is no necessary to claim large bypass ratio in rocket ejector design . in the comparison between two configurations , the typical one has better performance , indicating the importance of pressure ratio 結果表明:在固定二次噴管出口面積和氧燃比的條件下,二次流(引射空氣流)流量的增加引起混合氣體出口速度的下降和總流量的增加,二者綜合作用使發動機推力增加,但增幅不大,表明在設計發動機結構和工作參數時,不必過分追求大的引射系數;兩種結構的性能對比分析表明了增壓比對引射火箭性能的提高具有重要意義;對引射火箭的熱力循環分析同樣表明,增壓比對于提高發動機性能非常關鍵。

In order to investigate the influence of characteristics parameters on detonation wave in a two - phase pulse detonation engine model . the peak detonation pressures and average velocities of two - phase pulsed detonation wave produced by pde model using gasoline as fuel and air as oxidizer under various ignition frequencies and various mixture ratios are measured systematically , and the relations influencing them are analyzed 為了探索氣-液兩相脈沖爆震發動機模型內特征參數對產生爆震波的影響規律,系統地測試了以汽油為燃料、以空氣為氧化劑的氣-液兩相脈沖爆震發動機模型在不同點火頻率及不同余氣系數下爆震波的峰值壓力以及平均爆震波速,并對其變化進行了分析。

The effects of elastomer , nucleator , inorganic rigid particles , anti - oxidizer , and the ultraviolet light stabilizers on various compounds of the epf30r were explicated . the samples of different components were placed under the ultraviolet radiation to testify their anti - aging properties 實驗從epf30r改性配方著手,研究了彈性體、成核劑、無機剛性粒子、抗氧劑、光穩定劑等組份在epf30r加工和應用中的作用。

The main research now is focused on the polymerization of difluoramino substituted oxetane monomers , the preparation of neopentyl difluoramino nitrato plasticizers , and the molecular design and synthesis of cyclic n - nitramino geminal difluoramino oxidizers 目前該領域的研究工作主要集中在二氟氨基取代環氧丁烷聚合物合成,新戊基二氟氨基硝酸酯增塑劑制備,以及環n -硝胺基偕二氟氨基氧化劑的分子設計與合成上。

The reasons for higher oxidizer flow rate , lower fuel regression rate and lower motor performance in both hot firings are discussed . several necessary improvements for the test system are suggested . 6 通過對兩臺發動機試驗結果的分析,找出了試驗中氧化劑流量偏高、燃料退移速率和發動機性能偏低的原因,并提出了具體的改進措施。

To find out the effective slurry with suitable type of oxidizer and concentration , chemical etching experiment was applied to the litao3 wafer . the chemical etching effects were analysed by measuring etching rate and x - ray spectrum 采用化學腐蝕實驗方法研究拋光液中氧化劑種類和濃度以及拋光液ph值對鉭酸鋰晶片化學去除的影響。

Simpler and cheaper are solid - fuel engines ; their fiery impetus comes from burning premixed fuel and oxidizer grains that are packed like coffee grounds into a cylindrical casing 固體燃料引擎比較簡單,也比較便宜,其猛烈的推力來自于燃燒預先混合好的燃料和氧化劑顆粒,它們像磨好的咖啡粉一樣,裝在圓筒狀的容器中。

In the auto - ignition igniter with knock - down subsections that uses decomposed hydrogen peroxide as the oxidizer , the liquid fuel is vaporized and autoignites when injected into the hot decomposition products 本文研究的過氧化氫自燃點火器,采用分段式結構,燃料噴入過氧化氫的高溫分解產物中,蒸發并自燃。

Unfortunately , the solid propellants ? usually aluminum fuel and ammonium perchlorate oxidizer ? burn fairly inefficiently , are toxic to the environment , and are difficult to fabricate and handle safely 然而固體推進劑(通常是鋁燃料和過氯酸銨氧化劑)燃燒效率頗低、對環境有害,而且很難安全地制造和操作。

Known as a good oxidizer , the solution has been found to cause stress cracking in polyethylene , polypropylene , and kynar ( pvdf homopolymer ) materials 由于外露管道在陽光照射下吸熱,或者淤積在球閥閥體的球與閥座之間的堆積物產生的反應熱,使得這種分解速度加快。