共查询到20条相似文献，搜索用时 578 毫秒
1.
A real case of a steel lattice shell suffering a fire was studied. Based on the theory of field modeling, fire dynamic simulator (FDS) was used to identify the temperature field. The damage mechanism of the structure was determined by FEM analysis. After damage assessment, the shell was repaired with the pipe-encasement method. Finally, field test was employed to check the capacity of the structure after repair. The numerical study results indicate that the damage assessment agrees well with field inspection, verifying the accuracy of fire numerical simulation and FEM analysis. The field test results prove that the pipe-encasement method is secure and reasonable, and the repaired shell is safe. 相似文献
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《Reading and Writing(初中版)》2005,(11)
Cao Cao of the Three Kingdoms period(220-265) was not only a capable politician inmanaging state affairs, but also a strate-gist good at leading troops in going to war.One summer, Cao Cao was leading histroops in a punitive expedition against ZhangXiu. It was extraordinarily hot. The burningsun was like a fire, and the sky wascloudless. The soldiers were walking onthe winding mountain paths. The denseforest and the hot rocks exposed to thesun on both sides of the paths made thesoldiers fee… 相似文献
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I went to Nanjing with my parents during the Spring Festival.I had a wonderful time there.There were lots of things to see and to do in Nanjing.The best part was visiting the Confucius Temple.We learnt a lot about Chinese history there.And we also took a boat trip along Qinhuai River.During the trip,we listened to Kun Opera.It was amazing!The next day,we climbed Zijin Mountain.It was great to enjoy natural beauty on top of the mountain.I felt tired but excited. 相似文献
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刘世一 《中学英语之友(初二版)》2007,(Z1)
Ⅰ.词汇。 A)用方框中所给的单词完成句子。 1. After a ____ meal, they told stories and sang songs by the camp fire. 2. There were four of us, so we divided the orange into ____ and each ate a piece. 3. ThatAs a special cinema. It only shows ____ films. 4. Scientists are now trying to ____ if this is possible. 5. When I was ill, I had a high ____; I felt very hot. 6. The children have a happy ____ at school. 7. The ____ in these villages still uses well water. 8. She is an ____ player and abl… 相似文献
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《Reading and Writing(初中版)》2006,(11)
It was a cool Tuesday night. Many people were already deep in sleep, but I was still reading an interesting novel. Suddenly I smelt something burning. I looked out of the window. Oh, my God! A fire had broken out! A house on the opposite side was on fire.… 相似文献
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Jeju Island is a volcanic island,dominated by Halla(汉拿)Mountain:a volcano 1,950 meters high and the highest mountain in South Korea.The island measures approximately 73 kilometers across east to west,and 41 kilometers from north to south.The island was created entirely from volcanic eruptions approximately 2 million years ago,during the time period extending from the Tertiary to the beginning of the Quaternary period,and consists chiefly of basalt and lava.The eruptions took place in the Cenozoic era. 相似文献
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Passage 1
I have two good friends. They are twins. One day I go to their home after school. They have a very nice bedroom. The room is new. A map of China is on the wall. A nice picture is on the wall, too. In the picture there are hills and a river with a boat on it. A big desk is beside the bed. Two chairs are behind the desk. Their books and pens are on the desk. Their school bags are behind the chairs. They have a cat. It＇s under the desk. The cat looks like a hat. A light （灯） is on the desk. 相似文献
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《天津大学学报(英文版)》2017,(3)
A support vector regression based on the mean impact value (MIV) model was constructed to identify the bioactive compounds inhibiting proliferation of He La cells in a combination of turmeric (Curcuma longa L.)and liquorice (Glycyrrhiza) extracts.The quantitative chemical fingerprint from 50 batches of turmeric and liquorice extracts was established using high performance liquid chromatography hyphenated to an ultraviolet visible detector.Qualitative results were obtained using ultra performance liquid chromatography coupled with electrospray ionization quadrupole time-of-flight tandem mass spectrometry.A total of 46 peaks (peaks 1–15 from turmeric and 16–46 from liquorice) were selected as "common peaks" for analysis.The inhibitory effect of the combined extracts on He La cells was measured by MTT (3- (4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay.It was found that 15 compounds (peaks:8,12,30,24,46,11,14,9,3,1,44,18,7,45 and 43)possessing high absolute MIV exhibited a significant correlation with the cytotoxicity against He La cells; most of these have already been confirmed with potential cytotoxicity in previous research.The important potential application of the present model can be extended to help discover active compounds from complex herbal medicine prior to traditional bioassay-guided separation.It is considered that this could be a useful tool for redeveloping herbal medicine based on the use of these active compounds. 相似文献
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During the last four decades, reinforced-concrete structure failures have been happening widely for many reasons, such as increased service loads, war accidents, fire, and durability problems. The economic losses due to those failures are very high. An expert system is an interactive computer-based decision tool that uses both facts and heuristics to solve difficult problems based on knowledge acquired from experts. To realize these requirements, a logic programming visual basic language is used together with visual diagnosis. The expert system, Diagnosis of Fire-Caused Damages to Reinforced-Concrete Tunnel Lining (DFCDRCTL) was developed in this work for diagnosing the annual damages caused by fire. The program is used as an alternative of a human expert to make annual technical decisions in diagnosing fire damages at the second reinforced-concrete tunnel lining segment. It is concluded that the proposed DFCDRCTL expert system is easy to use, and is fast and helpful for engineers. 相似文献
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高利平 《中学生英语读写(高考版)》2002,(1)
A visitor visits an island where two tribes live. One tribe always tells the truth and the other always lies. The truth-tellers live on the western side of the island, and those who lie live on the eastern side. The visitor wants to determine whether the native beside him is a truth-teller or not by 相似文献
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王超 《语数外学习(初中版)》2004,(10):62-63
The black robin(知更鸟)is one of the world' s rarest birds. It is a small, wild bird,and it lives only on the island of Little Mangere, of the coast of New Zealand. In 1967 there were about fifty black robins there; in 1977 there were fewer than ten. These are the 相似文献
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杨俊杰 《中学英语园地(高三版)》2006,(2)
Long, long ago people made fires from lightning(闪电). But they had to keep the fire burning, for they couldn't start it again if there was no lightning. Later, they found out hitting two pieces of stones together could make a spark(火花). The spark could fire dry leaves. In this way they could make the fire again if it went out. Then people also learned to make a fire by rubbing. They made a hole on a big piece of wood and put a smaller stick into the hole. They turned the stick again and a… 相似文献
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《中学课程辅导(初三版)》2004,(8)
More about Hainan IslandHainan Island is the second largest island in China.It lies 48 kilometers off the Leizhou Peninsula(雷州半岛)and about one and a half hours by plane from Zhanjiang.The Liu ling Mountains runs down the center of Hainan from the northeast to the southeast and covered with tropical(热带的) forests. There are 50 kinds of min-erals(矿藏). Rice,sugarcane,tobacco,cotton coffee,rubber and many other fruits are grown on the island. Fishing has always been an important means… 相似文献
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Doctor John Perry decided it was time to go home. It had been a perfect (完 美 的 ) day-a day alone, the first such day in many years. H e had filled his bag with all sorts of sea shells (贝 壳 ), enough to study for months. The island had been a goodplace to find shells. But now the sun was going down.H e m ust leave before it got dark. He picked up his bag of shells and walked towardthe edge of the island.H e came to the sand reef(暗 礁 ,沙 洲 )that led from the island to shore.He stopped… 相似文献
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《英语辅导》2003,(28)
Passsge 1:It was one of those days in the Wild West. A rugged cowboy with a horrible scar on his face and a shiny gun at his belt rode very slowly into a dusty town as if he was a dead man. He left his horse outside the bar and stepped inside. The bar was full of people. They all gave the stranger a look in a brief moment of silence before they went back to their own drinking and laughing. The stranger ordered a glass of cold beer, gulped it down and walked out slowly-only to find his horse missing. 相似文献
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【同步阅读】Passage1I have two good friends.They are twins.One day I go to their home after school.Theyhave a very nice bedroom.The room is new.Amap of China is on the wall.A nice picture ison the wall,too.In the picture there are hillsand a river with a boat on it.A big desk is be-side the bed.Two chairs are behind the desk.Their books and pens are on the desk.Theirschool bags are behind the chairs.They have acat.It’s under the desk.The cat looks like ahat.A light(灯)is on the desk.1.What is not in the twins’bedr... 相似文献
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Hainan Island is the second largest island inChina. It is situated on the Nanhai Sea(SouthChina Sea) and faces Guangdong Province acrossQiongzhou Strait (海峡).Hainan Province was established(建立)in 1988. It consists of HainanIsland, Xisha Islands, Zhongsha Islands, NanshaIslands and the vast sea areas around them. 相似文献