Now keyword search over relational database is becoming a hot research topic in both database and IR area. There are two kinds of popular keyword search systems, while neither of them can give accurate results with high speed. The on-line system can obtain the latest search results while the search speed is low; The off-line system speeds the query processing by means of preprocessing, but the disadvantage lies in expensive cost needed to preprocess again once the database is updated.

關(guān)系數(shù)據(jù)庫上的關(guān)鍵詞檢索已成為數(shù)據(jù)庫和信息檢索領(lǐng)域的研究熱點之一現(xiàn)有數(shù)據(jù)庫關(guān)鍵詞檢索系統(tǒng)可分為在線和離線兩大類，它們都難以兼顧查詢效率和效果：在線系統(tǒng)能夠獲得數(shù)據(jù)庫最新結(jié)果在线观看亚洲免费，但速度較慢美女视频黄黄；離線系統(tǒng)使用預(yù)處理提高查詢速度，但若數(shù)據(jù)庫更新就要重新執(zhí)行預(yù)處理农村女人一级特黄大片。

The regeneration of existing housing is an important content of Urban Sustainable Development.

既有住宅的更新改造精品之毛片一级毛片毛片，是城市可持續(xù)發(fā)展的一個重要內(nèi)容。

Lavender or Sandalwood oil could be used as substitutions for the plant material, Bergamot oil has balancing and renewing properties and Clary Sage oil calms troubled minds or emotional upsets.

薰衣草或者檀香油可作為替代的植物材料佛手油平衡和更新性質(zhì)的石油和克拉里圣者心中不安或情緒平靜打破日韩专区欧美专区亚洲福利。

At the base of Soup Kitchen International's solution was comprehensive technology guidance from eMazzanti Technologies.

此更新解決 Windows XP 中"不一致的間隔計數(shù)可造成 1394 設(shè)備不能枚舉"的問題人人操人人搞人人爱，在 Microsoft 知識庫文章 Q329256 中有相關(guān)論述。

The major topics are: Poisson process, renewal process, discrete time and continuous time Markov chains, stationary process, Brown motion and stochastic integral introduction

本課程的主要內(nèi)容包括泊松過程與更新過程www.yw尤物视频、離散時間與連續(xù)時間的馬爾可夫鏈、平穩(wěn)過程粗硬大西欧一级毛片、布朗運動與隨機積分初步日韩一区二区三区无码不卡毛片。

They must be read by computers or anagogic equipment. They are relative small and light but they can be deposited a vast of information and the information can last long. Multimedia and interactive internet publications can be retrieved conveniently. The information of internet publications can be refreshed, edited, transferred, communicated by Internet quickly, internet publications possess access speeds, retrieval accuracy, interactivity, and flexibility.

網(wǎng)絡(luò)出版物具有信息量大，使用方便黄a频美女网站网站频a，可對信息進行各種處理黄页网站在线播放免费，檢索快速便捷，圖文聲像并茂国产一区在线在线播放，交互性強18岁的男人看黄色视频，省去了印刷、裝訂精品九九九在线视频免费看、儲運等環(huán)節(jié)男女啪啪视频入口欧美国产，降低了生產(chǎn)成本，出版周期短aigao激情在线视频，信息通過計算機網(wǎng)絡(luò)高速傳播深夜15级A毛片免费视频，信息獲取快、傳播快99拍一黄色视频,老师、更新快等特性免费AV在线播放不卡；并且具有計算機檢索功能、超文本功能，使之成為一種具有強大生命力的大眾文化傳播媒體中日韩人人操人人干，給人類社會帶來了深刻的影響五月天婷婷在线观看网站。

BACKGROUND: Compared with adult mesenchymal stem cells, yolk sac-derived MSCs of early embryo have stronger self-renewal capacity and plasticity. Moreover, they could differentiate into angioblast and hemopoietic stem cells during embryonic development and trigger embryonic angiogenesis and hemopoietic tissue development.

背景：與成體間充質(zhì)干細胞相比，來源于早期胚胎的卵黃囊間充質(zhì)干細胞有更強的自我更新能力和可塑性性感xxxxx，且在胚胎發(fā)育過程中可分化為成血管細胞和造血干細胞中文字幕亚洲精品导航，啟動胚胎血管發(fā)生和造血組織發(fā)育。

The so-called miracle, the so-called continuous此恨never, my dear, is now different in ancient times, not so touching earnestness, the world is changing day by day, love can also be updated from time to time, no longer deceive ourselves what is truly can not outrightly ruled out the possibility that as long as you are willing to should not the future牽絆emotion, on the believe that have been severed, the only way to be able to forge ahead in exchange for new students.

所謂奇跡在线观看国产更新视频播放器，所謂此恨綿綿無絕期亚洲图片无码一区二区最新，親愛的，現(xiàn)在不同古時黄片少妇，沒有那么纏綿深長按摩深夜A级毛片视频免费，天地天天在變，愛情也可時時更新尹人影视，不必再騙自己有什么是真正決絕不了的黄色丝袜a片，只要你愿意，不該牽絆未來的情感久东京热，就該相信已經(jīng)斷絕国产3p一区二区三区视频在线，唯有這樣，才能跨步向前亚日一级a，換取新生免费一级A毛片在线播放一级。

ExxonMobil Chemical has worldwide resources available to help the Agchem industry reassess and reformulate pesticide s and herbicides.

埃克森美孚化工所擁有的全球化資源可幫助農(nóng)用化學(xué)品工業(yè)生產(chǎn)出新的殺蟲劑和除草劑并更新配方国产黄片高清无码在线观看。

ExxonMobil Chemical has worldwide resources available to help the Agchem industry reassess and reformulate pesticides and herbicides.

叭巳瞬偃巳烁闳巳嗣擞肼恚克森美孚化工所擁有的全球化資源可幫助農(nóng)用化學(xué)品工業(yè)生產(chǎn)出新的殺蟲劑和除草劑并更新配方。