In addition, some experience formulas for them are regressed. The third chapter establishes a unified S-N curve equation to calculate multi-axial fatigue ultimate strength of concrete considering both the effect of confinement and minimum/maximum stress ratio, based on the triaxial fatigue test data in this paper and the test results under uniaxial and biaxial fatigue loading in previous literatures. Moreover, the consistency of calculating condition fatigue ultimate strength with fatigue life distribution and initial ultimate strength distribution is analyzed.

第二章簡要地介紹了本文三軸疲勞試驗裝置一区国产在，進行了兩向等側(cè)壓約束下混凝土立方體試件三軸受壓等幅和變幅疲勞試驗，分析了三軸受壓疲勞破壞機理国产模特视频一区一页，給出了相應(yīng)的疲勞破壞試驗判斷標(biāo)準(zhǔn)久久免费观看视频www；得到了混凝土在兩向側(cè)壓約束下單級和多級受壓疲勞的變形發(fā)展規(guī)律，包括最大縱向應(yīng)變人人人干人人人操、殘余應(yīng)變www.caopor.com、最大縱向應(yīng)變率和疲勞變形模量等隨循環(huán)次數(shù)的發(fā)展規(guī)律以及疲勞損傷的演變規(guī)律，并給出了相應(yīng)的經(jīng)驗公式12av天堂网。

The results are listed as following :㏕he best anti-erosion proportion of resin present is 25wt% in the condition of silicon carbide reinforced SMCC, while the alumina reinforced SMCC is 40wt%.(2) The better anti-erosion results was achieved with the ratio of silicone resin to acrylic resin containing hydroxy being 3: 1.㏕he composites coating tends to be more brittle when added in alundum particles. It also means that the maximum erosion peak of alundum reinforced SMCC tends to normal angle.甌he change of erosion rate of SMCC can be divided into two stages with the increment erodent velocity: the slow erosion stage of the beginning and the stable erosion stage.

首次發(fā)現(xiàn)：①SiC增強的復(fù)合涂料涂層国产激情,亚洲，樹脂含量為25wt％時，具有最佳耐沖蝕性能：Al_2O_3增強的復(fù)合涂料涂層乱亲伦交换免费看视频，樹脂含量為40wt％時午夜理理伦，具有最佳耐沖蝕性能；②SiC增強的涂料在线观看操av网站，有機硅樹脂與丙烯酸樹脂的比例為3：1時的耐沖蝕性能好于1：1的復(fù)合涂料涂層黄a视频全免费在线观看；③Al_2O_3增強體使涂層變脆的傾向大于以SiC為增強體的涂層，即SiC增強的復(fù)合涂料涂層的最大沖蝕率出現(xiàn)在30°色色天天色色色综合色，Al_2O_3增強的復(fù)合涂料涂層的最大沖蝕率出現(xiàn)在75°～90°之間午夜福利国产精品久久超碰；④低速沖蝕磨損機理主要是彈性變形與疲勞；高速沖蝕磨損機理主要是顯微切削和顯微犁耕久久精品爱。

Then using 3,4,5-trichlorobenzotrifluoride as starting material to prepare 2,6-dichloro-4-trifluoromethylaniline through three routines, The direct ammonolysis method may realize the maximum use of the atom and it meets the modern green chemistry requirement. But the reaction must carry on under the high temperature and high pressure condition, and side reaction had occurred, the conversion was high, but the yield of the product was only 68%.

直接氨解法可以實現(xiàn)原子的最大利用率日本AAAA三级片，符合現(xiàn)代綠色化學(xué)原子經(jīng)濟性要求，但是反應(yīng)需在高溫高壓條件下進行免费日韩h视频，且有副反應(yīng)發(fā)生一级黄色视频女人射精，原料轉(zhuǎn)化率高，但所需產(chǎn)品的收率只有68%中文字幕亚洲一区二区系列。

To determine the condition of chromogenic reaction between iodine and amylum quantitatively, the author studied the law in the course of chromogenic reaction between iodine and amylum with the aid of spectrophotometer quantitatively, and found that maximum absorption wavelength is 610 nm, and the absorbance in the course of chromogenic reaction between iodine and amylum has not changed within 7 hours.

為了確定碘和淀粉反應(yīng)的定量關(guān)系免费人人插人人操，本文利用分光光度計定量地研究了碘和淀粉顯色反應(yīng)過程中吸光度的變化規(guī)律，發(fā)現(xiàn)碘和淀粉顯色反應(yīng)的最大吸收波長為610 nm免费AV在线播放不卡，碘和淀粉顯色反應(yīng)的吸光度在七小時內(nèi)基本不變影音先锋欧美性爱色资源，可以進行比色分析2018亚洲精彩偷拍视频。

Under the given condition of acoustic driver, the acoustic field including oscillating pressure, volume flow rate and acoustic impedance in resonator was theoretically reconstructed by using the two-microphone method. The experiment results validate that this method is applicable and accurate for the positions with non pressure antinode and node in resonator. The maximum errors near antinode and node area are up to 12.4%.

在給定雙聲源條件下，采用雙傳感器法對該系統(tǒng)諧振管中的聲場參數(shù)（包括聲壓www.黄色av.com、質(zhì)點速度免费在线不卡av、當(dāng)?shù)芈曌杩沟龋┓植歼M行理論聲場重構(gòu)，并通過實驗分析一边摸一边捅，證實了該方法在等徑諧振管內(nèi)非聲壓腹點和節(jié)點處的適用性和準(zhǔn)確性黄色视频A片120，而在聲壓腹點和節(jié)點處的誤差最大達(dá)到12.4%。

Environmental testing equipment in a stable condition, in 30 minutes (test once every 2 minutes) each test measured maximum temperature and minimum temperature difference between the arithmetic average

環(huán)境試驗設(shè)備在穩(wěn)定狀態(tài)下欧美一级人与嘼视频免费播放，在30min內(nèi)(每2min測試一次)每次測試中實測最高溫度與最低溫度之差的算術(shù)平均值

The result shows, grass of Sikkim small hole is temporary decline Yan period with permanent decline water content of Yan period soil is respectively 7.06% be in temporary decline with 6.20%; the Sikkim of Yan period is small after water of Kong Cao answer bibulous and rapid, decline Yan condition is eliminated gradually, appearance of aftertreatment group of answer water 6 H and contrast active of basic consistent;SOD is during threatening processing with markedder than notting have to taking a picture change, the ascendant;CAT that there is certain range after answer water and POD active are in threatening during after rising first, drop, all remarkable prep above contrasts level, and the active;MDA content that still keeps taller after answer water as the extension of time of arid and threatening processing mushroom, to threatening the 8th climate reachs maximum, content of the MDA in the lamina after answer water drops quickly, arrive the 5th day after answer water, content of the MDA in threatening group lamina is adjacent already contrast level.

結(jié)果顯示日韩偷拍福利写真视频网址大全，錫金微孔草暫時萎焉期和永久萎焉期土壤含水量分別為7.06%和6.20%；處于暫時萎焉期的錫金微孔草復(fù)水后吸水迅速91香蕉视频羞羞视频，萎焉狀態(tài)逐漸消除2021年最新午夜理论亚洲无码，復(fù)水6 h后處理組外貌和對照基本一致；SOD活性在脅迫處理期間和對照相比無顯著變化一級性生活A片，復(fù)水后有一定幅度的上升老熟妇仑乱一区二区；CAT和POD活性在脅迫期間先上升后下降，均顯著高于對照水平日韩性交A片，且復(fù)水后仍然保持較高的活性你懂的日最新视频在线；MDA含量隨著干旱脅迫處理時間的延長而迅速增加，到脅迫第8天時達(dá)到最大值精品国产免费网站，復(fù)水后葉片中MDA含量迅速下降呦齿微信群，到復(fù)水后第5天，脅迫組葉片中MDA含量已接近對照水平www.jipav。

In our study the average of closure ratio was 0.85, Bowen ratiowas used to evaluated the change of energy component on the soil condition of paddy field, the results showed this ratio will be changed when soil tension was 40 centibar during the maximum tillage stage of rice.

而由探討土壤水分狀態(tài)影響能量項的變化www.MMM日本，當(dāng)水稻最高分蘗期，土壤張力值約40千巴時亚州欧美一级性交，潛熱和可感熱的比值逐漸改變美女一级黄色毛片在线。

Results show that the nanometer particles are in spherical shape, the size of particles is homogenized and controllable, no agglomeration. The particle size changes with the processing condition; the maximum particle size is in the range of 80~90 nm, and the minimum particle size is in the range of 25~30 nm. The ice performance test in indoor cloud chamber shows that the nanometer silver iodide particles as catalyst for artificial weather modification have great application prospect.

結(jié)果表明：納米碘化銀粒子成球形黄色网站天天天，粒徑均勻可控黄片一级二三级，無明顯團聚現(xiàn)象，不同工藝條件下獲得的碘化銀粒徑不同欧美激情欧美激情欧美，最大粒徑范圍在80~90 nmwww久久网，最小粒徑范圍在25~30 nm，因為碘化銀具有類冰結(jié)構(gòu)午夜免费福利视频，是最佳成冰物質(zhì)女主播午夜福利在线一区二区三区四区五区，故納米碘化銀粒子作為人工影響天氣催化劑具有極大的應(yīng)用前景。

In this chapter, under the penalty functional satisfies the local Lipschitz condition, by using the Ekeland's variational principle and the properties of finite codimension, the Pontryagin's maximum principle of corresponding optimal control problem whose control variable is the harvesting rate and the input rate respectively is obtained.

本章在性能指標(biāo)泛函滿足局部Lipschitz條件下欧美精品C0m，利用Ekeland變分原理和有限余維的性質(zhì)国产日韩欧美色综合，證明了控制變量分別為收獲率和輸入率的相應(yīng)控制問題的Pontryagin極大值原理。