To give the definition of the mass concrete and to concrete\'s cracks together with practical meanings of control ,and give a brief review on the research in the field at home and abroad, at last, methods to control temperature crack of the mass concrete from several aspects such as design measures,concrets material, construction schedules.etc are summed up; To explain the physical mechanics of the concrete and computing methods-Difference Method and Finite Element Method, and illustrate the application of their specific methods repectively;Several temperature factors that can influence the temperature stress of mass concrete baseplate are analyzed. The influence degree of temperature factor can be got through the ANSYS simulation computation the control of temperature can control the temperature stress, consequently control the temperature crack of mass concert baseplate; through the influence of the crack resistance ability of mass concrete baseplate which takes the reinforcement as a part is analyzed. By ANSYS simulation, the best suited volume ratio of reinforcement is found out, at same time the layout of reinforcement with the same volume ratio can also affect the resistance ability of mass concrete baseplate. Sum up of above analysis, anti-crack function of steel bar in early mass concrete baseplate is obvious, so it\'s necessary to consider beneficial effect of construction steel bar in research of temperature control on mass concrete baseplate.

本文先容了大體積混凝土及混凝土裂縫的基本概念，對國內(nèi)外在這個領(lǐng)域里的研究現(xiàn)狀作了扼要敘述欧美狂野性爱一级，并從結(jié)構(gòu)設(shè)計、混凝土材質(zhì)、施工措施等方面總結(jié)了大體積混凝土溫度裂縫控制的方法及防止措施www.9色色；闡述了混凝土的基本物理力學(xué)性能，總結(jié)了大體積混凝土溫度計算的方法——差分法和有限元法在线无码国产观看播放网址，并分別舉例說明其具體應(yīng)用的方法久久久精品合；分析了影響大體積混凝土底板溫度應(yīng)力的幾種溫度因素，利用ANSYS模擬計算2019年一级黄片，得出了每種因素的影響程度国产一级α爱免费视频，通過分析提出了在這幾種溫度影響因素下如何通過控制溫度以達(dá)到控制溫度應(yīng)力從而來控制裂縫的具體建議；針對大體積混凝土基礎(chǔ)底板中配筋的不同對混凝土底板抗裂能力的影響不同欧美丝袜A∨在线一区二区三区，利用ANSYS進行模擬分析久操视频福利在线，得出底板中最合適的體積配筋率，同時分析了在相同體積配筋率下鋼筋的具體布置對大體積混凝土基礎(chǔ)底板抗裂能力的影響加勒比官网中文在线，分析表明日韩精品理论片在线观看，配置鋼筋對混凝土結(jié)構(gòu)的開裂阻止作用明顯免费亚洲爱爱视频，在研究大體積混凝土溫度裂縫題目時，要考慮鋼筋在其中的有利作用欧美黑人大屌视频。

So, the average density of spatial energy of spatial radius is the length of Planck of relative time-space cosmic energy follow the rise and fall of quantum spatial measurement, at original cosmic time-space set out, from the structure-energy of mass 16.38×10-71 N · m to the space-energy of 8.19×10-71 N · m and the mass-energy of 8.19×10-71 N · m, come to do not exceed the structure-energy of mass 32.76×10-71 N · m to the space-energy of 8.19×10-71 N · m and the mass-energy of 24.57×10-71 N · m, not smaller the structure-energy of mass 21.84×10-71 N · m to the space-energy of 8.19×10-71 N · m and the mass-energy of 13.65×10-71 N · m, come to do not symmetrically gradually belong to stabilization thus at reductively fluctuate, not can reversely strides across reach the stable state of structure-energy mass 24.57×10-71 N · m to the space-energy of 8.19×10-71 N · m and the mass-energy of 16.38×10-71 N · m maintain unchanging.

所以韩国日本国产欧美一区二区，宇宙能量的相對時空空間的半徑為普朗克長度的空間的能量平均密度隨宇稱量子的漲與落，在原初的宇宙時空啟動中日韩一级小片免费播放，從16.38×10-71N · m 質(zhì)量結(jié)構(gòu)能對于8.19×10-71N · m 空間能與8.19×10-71N · m 質(zhì)能啪啪啪啪网址，成不大于32.76×10-71N · m 質(zhì)量結(jié)構(gòu)能對于8.19×10-71N · m 空間能與24.57×10-71N · m 質(zhì)能，不小于21.84×10-71N · m 質(zhì)量結(jié)構(gòu)能對于8.19×10-71N · m 空間能與13.65×10-71N · m 質(zhì)能国产特黄特色AA片一级真人视频，成不對稱地遞歸于穩(wěn)定而在縮小地波動欧美AA级三级片，不可逆地跨越到24.57×10-71N · m 質(zhì)量結(jié)構(gòu)能對于8.19×10-71N · m 空間能與16.38×10-71N · m 質(zhì)能的穩(wěn)定狀態(tài)保持不變。

Age, body mass index and the main outcomes of PSG were compared between the two groups. ResultsAll 230 patients had an oropharynx obstruction, of them 120 had a retrolingual obstruction, 105 had a nasal obstruction and 53 had a nasal obstruction and retrolingual obstruction.

方法回顧分析230例OSAHS患者的上氣道阻塞情況99热这里只有在线观看精品9，并根據(jù)是否存在舌根平面阻塞將患者分為兩組成人福利影院免费观看网站，比較年齡，體質(zhì)指數(shù)（body mass index一区二区不卡免费在线， BMI）及PSG主要監(jiān)測指標(biāo)色久综合在线。

This paper determined the olfactory respones of Tetranychus viennensis to different plants odors with "Y" olfactometer and petri-dish, volatiles from leaves of different plants were absorbed with SPME and analyzed with GC-MS (gas chromatograph-mass spectrometer). At the same time, the effects of different host plants on the development of Tetranychus viennensis were determined by means of the leaf-dish rearing method , in addition, the contents of some chemicals in the leaves of different plants were also determined.

本文用&Y&形嗅覺儀法和培養(yǎng)皿法測試了山楂葉螨Tetranychus viennenis Zacher對不同植物氣味物質(zhì)的嗅覺反應(yīng)，并利用固相微萃取SPME吸附xfplay资源、用氣相色譜—質(zhì)譜聯(lián)用儀GC-MS(gas chromatograph-mass spectrometer)分析了不同植物葉片的揮發(fā)性物質(zhì)成分：同時采用海綿水盤法飼養(yǎng)山楂葉螨女人18毛片九区毛片，研究了不同植物對山楂葉螨生長發(fā)育的影響，并測定了不同植物葉片中一些生化物質(zhì)的相對含量美女黄的免费。

The L2 glass with 30 mass% Al2O3 filler (L30A) can be fully densified at 800oC in 1 h and devitrified at 850oC for 10 min. The sintering scheme has been optimized to achieve limit dissolution of Al2O3 grain and crystallization of equi-axial LaBO3 and flaky LaAl2B3O9 crystals. The final matrix has limited glassy phase.

L2玻璃添加30 mass%的氧化鋁（簡稱L30A）於800oC持溫一小時并於850oC作十分鐘的結(jié)晶處理可達(dá)完全致密爽爽爽A片男女免费爽视频屁股，整體的燒結(jié)流程設(shè)計亦已最佳化，微結(jié)構(gòu)觀察中可發(fā)現(xiàn)等軸LaBO3及片狀LaAl2B3O9之結(jié)晶體看A一级欧美黄色录像，其燒結(jié)后之基地僅殘存有限的玻璃相噜噜吧先锋音av资源一百度。

Preferential dissolution of α phase for specimens processed less than 12 hrs were revealed by using ICP-MS (inductively coupled plasma-mass spectroscopy). Hydrides having precipitated in the α-phase at the near surface peeled off into the electrolyte, and thus resulted in reduced HUE for specimens having experienced longer charging periods. In order to increase HUE, the hydrogenation promoter, Na2S2O35H2O, was added into the electrolyte to see the effect on the hydrogen absorption.

感應(yīng)耦合電漿質(zhì)譜分析術(shù)(inductively coupled plasma-mass spectroscopy； ICP-MS)分析發(fā)現(xiàn)xx网站在线观看，滲氫前一階段（12小時）鋁元素有較明顯之溶釋現(xiàn)象优物美女在线观看，此一現(xiàn)象肇因於滲氫作用使近表面層α-相中析出之氫化物體積逐漸擴大膨脹，最后剝落而溶於硫酸水溶液国产91精品片在线，也因此造成長時間之滲氫效率未隨滲氫時間增加而增加在线播放免费人成视频网站v片。

In this paper, an approach to handling this problem is proposed. Before adopting the Dempsters rule to combine belief functions, the assignments of mass functions are pretreated by the disturbance of ignorance.

提出一種新的沖突證據(jù)合成方法，即在Dempster合成之前欧美4438，基于未知擾動對mass函數(shù)進行預(yù)處理免费看日本黄色视频，并通過預(yù)處理來解決標(biāo)準(zhǔn)化問題。

The term combines the old English words for "loaf" and the Christian"mass", and in early church Lammas was the festival of the wheat harvest .

它是由兩個英語單詞結(jié)合而成的：loaf和mass香蕉香蕉国产片一级一级毛片。在早期教會里国产jiuse视频网站最新地址，&收獲節(jié)&是慶祝收割麥子的節(jié)日。

We have synthesized a series of 4,4′ perfluoro-alkylated bipyridine ligands[4,4′- bis(RfCH2OCH2)-2,2′-bipyridine , Rf=HC4F8(1a), HC8F16(1b), C3F7(1c) and C10F21 (1d)] by nucleophilic substitution reactions. The reaction of fluorinated alkoxide on 4,4′-bis-2,2′-bipyridine results in the systheses of these four fluorinated ligands. These reactions are high yieldings and purification is easy. The structures are analyzed by GC-MASS午夜啪啪啪大片、NMR亚洲午夜久久久久久69、FT-IR etc.

中文摘要我們已合成出一系列在聯(lián)吡啶的4国产美女破处自拍，4′位置有兩個氟化烷基側(cè)鏈的聯(lián)吡啶配位基[4，4′-bis(RfCH2OCH2)-2网站懂得，2′-bipyridine 超碰在线最新地址， Rf=HC4F8(1a)伊人中文字幕中文无码， HC8F16(1b)怕怕怕1000无档免费视频网站， C3F7(1c)及C10F21(1d)]，經(jīng)由親核取代反應(yīng)色哟哟一区二区，由4加勒比精品在线，4′-bis-2，2′-bipyridine反應(yīng)而得色在线,com，并具有不錯的產(chǎn)率在线三区四区，其純化也簡易可行，所合成之產(chǎn)物并可用GC-MASS黄页网站大全手机在线观看、NMRav在线不卡观看免费观看、FT-IR鑒定其化學(xué)結(jié)構(gòu)。

A rapid and simple method was developed for determination of aroma c omponents of apple wine by head space solide-phase microextraction coupled to capillary gas chromatography-mass spectrometry. Four paramete rs, including fiber coatings,extraction time,concentration of salt, and extraction temperature,were optimized. 2-Octanol was used as an inter nal standard for accuracy improvement.

以頂空固相微萃取法（Head Space Solid-Phase Micro-Extractions国产呦系列合集1000部，HS-SPME）和氣相色譜質(zhì)譜（Gas Chromatgraphy-Mass SpectrometryAA高潮女人免费视频看中国特色，GC-MS）聯(lián)用，2-辛醇為內(nèi)標(biāo)亚洲欧美日本A∨在线观看，研究了萃取頭亚洲一区欧美日韩字幕、萃取時間、加鹽質(zhì)量濃度免费国产乱伦不卡、萃取溫度對蘋果酒中香氣物質(zhì)萃取的影響无码AV无码AV毛片毛，優(yōu)化了分析條件，建立了快速測定蘋果酒中香氣物質(zhì)的方法亚洲日韩第三四页。