JP2006048684A - 情報検索システムにおけるフレーズに基づく検索方法 - Google Patents
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Abstract
【解決手段】文書内の他のフレーズの存在を予測するようにフレーズを識別する。文書は、それに含まれるフレーズによりインデックス化される。関連フレーズおよび拡張フレーズも識別する。クエリー内のフレーズを識別し、フレーズを用いて文書を検索し、ランク付けする。また、フレーズを用いて検索結果の文書をクラスタ化し、文書の説明を作成し、検索結果およびインデックスから複製文書を削除する。
【選択図】 図1
Description
この出願は、下記の係属中の出願に関連している。
出願日2004年7月26日、出願番号第10/xxx、xxx号、名称「情報検索システムにおけるフレーズ同定化」、
出願日2004年7月26日、出願番号第10/xxx、xxx号、名称「情報検索システムにおけるフレーズに基づくインデックス化」、
出願日2004年7月26日、出願番号第10/xxx、xxx号、名称「情報検索システムにおけるフレーズに基づく検索の個人化」、
出願日2004年7月26日、出願番号第10/xxx、xxx号、名称「フレーズを用いる検索結果の自動ソート生成」、
出願日2004年7月26日、出願番号第10/xxx、xxx号、名称「フレーズに基づく文書説明の生成」および、
出願日2004年7月26日、出願番号第10/xxx、xxx号、名称「情報検索システムにおけるフレーズに基づく複製文書の検出」、
これらは全て共に所有されており、本明細書中に引用して組み込む。
図1について説明する。本発明の一実施の形態による検索システム100の実施の形態のソフトウエアアーキテクチャを示す。本実施の形態では、システムには、インデックス化システム110、検索システム120、提示システム130、およびフロントエンドサーバ140が含まれる。
II.インデックス化システム
1.フレーズ識別
2.関連フレーズ、および関連フレーズのクラスタの識別
3.フレーズおよび関連フレーズによる文書インデックス化
a)文書の主題を判定
b)改良型ランク付けのための文書注釈
III.検索システム
1.クエリーおよびクエリー拡張のフレーズ識別
2.ランク付け
a)含まれるフレーズに基づく文書ランク付け
b)アンカーフレーズに基づく文書のランク付け
3.フレーズに基づく検索個人化
IV. 結果提示
1.提示のための動的ソート生成
2.主題に基づく文書説明
a)一般的な主題文書説明
b)個人化した主題に基づく文書説明
3.複製文書の検出および削除
170 クライアント
180 インターネット
190 ウェブサイト
Claims (14)
- クエリーに応じて文書コレクション内の文書を選択する方法であって、
クエリーを受け取るステップと、
前記クエリー内の複数のフレーズを識別するステップであって、少なくとも1つのフレーズが多数のワードから成るフレーズであるステップと、
前記識別したフレーズの内の少なくとも1つのフレーズ拡張を識別するステップと、および、
前記文書コレクションから、前記クエリーおよび前記フレーズ拡張内のフレーズを含む集合からの1つのフレーズに含む文書を選択するステップと、
を含む方法。 - 文書を選択するステップは、
識別したフレーズのポスティングリストと、識別したフレーズのフレーズ拡張のポスティングリストとを結合して結合ポスティングリストを形成するステップと、
前記結合ポスティングリストおよび前記他の識別したフレーズのポスティングリストに出現する文書を選択するステップと、
を含む請求項1の方法。 - クエリーに応じて文書コレクション内の文書を選択する方法であって、
クエリーを受け取るステップと、
前記クエリーの不完全フレーズを識別するステップと、
フレーズ拡張により前記不完全フレーズを置換するステップと、
前記フレーズ拡張を含む前記文書コレクションから文書を選択するステップと、
を含む方法。 - 不完全フレーズと識別するステップと前記不完全フレーズを置換するステップは、
前記クエリー内の候補フレーズを識別するステップと、
前記候補フレーズを不完全フレーズのリストにある不完全フレーズと一致させるステップと、
前記候補フレーズを不完全フレーズと関係付けられるフレーズ拡張で置換するステップと、
を含む請求項3の方法。 - 不完全フレーズのフレーズ拡張は、前記不完全フレーズで始まる前期不完全フレーズのスーパーシーケンスを含む請求項3の方法。
- クエリーに応じて文書コレクション内の文書を選択する方法であって、
第1フレーズおよび第2フレーズを含むクエリーを受け取るステップと、
前記第1フレーズを含む文書のポスティングリストを検索するステップと、
前記ポスティングリストの各文書に対して、
前記文書にある前記第1フレーズの関連フレーズを示すリストにアクセスするステップと、
前記第2フレーズが文書にあることを示す関連フレーズの前記リストに応じて、前記第2フレーズを含む文書のポスティングリストを検索せずに、前記クエリーに対する結果に含めるよう前記文書を選択するステップと、
を含む方法。 - 更に、前記第2フレーズが文書にないことを示す関連フレーズの前記リストに応じて、前記第2フレーズを含む文書のポスティングリストを検索せずに、前記クエリーに対する前記結果から前記文書を削除するステップ、
を含む請求項6の方法。 - 前記第2フレーズが前記第1フレーズの関連フレーズではないことを示す関連フレーズの前記リストに応じて、前記第1フレーズに対する文書の前記ポスティングリストと、前記第2フレーズに対する文書のポスティングリストとの共通部分を求めて、前記第1フレーズおよび前記第2フレーズをともに含む文書を選択するステップ、
を含む請求項6の方法。 - 更に、ビットベクトルにおける文書に関する第1フレーズに対する関連フレーズの前記リストを格納するステップであって、前記ビットベクトルのビットは、前記文書にある前記第1フレーズの各関連フレーズに対して設定されるとともに、前記ベクトルのビットは、前記文書にない前記第1フレーズの各関連フレーズに対して設定されず、前記ビットベクトルは数値を有するステップと、
前記文書にある前記第1フレーズの関連フレーズに対する前記ビット設定に従って前記ビットベクトルの調整値を決定することにより選択した文書をスコア付けするステップと、
を含む請求項6の方法。 - クエリーに応じた検索結果に含まれる文書をランク付けする方法であって、前記クエリーは少なくとも1つのクエリーフレーズを含み、
前記検索結果の各文書に対して、クエリーフレーズに対する関連フレーズビットベクトルにアクセスするステップであって、前記ビットベクトルの各ビットは、前記クエリーフレーズの関連フレーズの有無を示すステップと、
関連フレーズビットベクトルにより前記検索結果の前記文書をソートするステップであって、最大値の関連フレーズビットベクトルをもつかかる文書は前記検索結果において最高位にランク付けされるステップと、
を含む方法。 - 前記関連フレーズビットベクトルの各ビットが前記クエリーフレーズの関連フレーズと関係付けられ、
前記ビットは、前記ビットベクトルの最上位ビットが、前記クエリーフレーズに関して最大の情報ゲインを有する関連フレーズと関係付けられ、最下位ビットが、前記クエリーフレーズに関して最小の情報ゲインを有する関連フレーズと関係付けられるように順位付けられる、
請求項10の方法。 - クエリーに応じた検索結果に含まれる文書をランク付ける方法であって、前記クエリーは少なくとも1つのクエリーフレーズを含み、
前記検索結果の各文書に対して、
前記クエリーのフレーズに対する関連フレーズビットベクトルにアクセスするステップであって、前記ビットベクトルの各ビットは、前記クエリーフレーズの関連フレーズの有無を示すステップと、
前記クエリーフレーズの関連フレーズがあることを示す各ビットについて、前記文書のスコアに、前記ビットと関係付けられる所定のポイント数を加えるステップと、
前記文書スコアにより前記検索結果の前記文書をソートするステップと、
を含む方法。 - 前記関係付けられるフレーズビットベクトルの各ビットが前記クエリーフレーズの関連フレーズと関係付けられ、
前記ビットは、前記ビットベクトルの最上位ビットが、前記クエリーフレーズに関して最大の情報ゲインを有する関連フレーズと関係付けられ、最下位ビットが、前記クエリーフレーズに関して最小の情報ゲインを有する関連フレーズと関係付けられるように順位付けられ、そして、
各ビットと関係付けられる前記所定のポイント数は、最上位ビットと関係付けられる最大ポイント数から、最下位ビットと関係付けられる最小ポイント数までの範囲に及ぶ、
請求項12の方法。 - 情報検索システムを提供する方法であって、
複数の文書を備える文書コレクションの妥当なフレーズを自動的に識別するステップであって、前記妥当なフレーズは多数のワードフレーズを含むステップと、
前記文書に含まれる妥当なフレーズにより前記文書をインデックス化するステップと、
検索クエリーを受け取るステップと、
前記クエリーに含まれるフレーズを識別するステップと、
前記識別したフレーズにより文書を選択するステップと、
前記識別したフレーズにより前記選択した文書をランク付けるステップと、
を含む方法。
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JP2011175670A (ja) | 2011-09-08 |
CN102226901B (zh) | 2014-01-15 |
CN106202248B (zh) | 2019-10-25 |
CN102226901A (zh) | 2011-10-26 |
US7599914B2 (en) | 2009-10-06 |
KR20060048778A (ko) | 2006-05-18 |
CN1728141A (zh) | 2006-02-01 |
CA2813644C (en) | 2016-08-30 |
ATE521946T1 (de) | 2011-09-15 |
CN106202248A (zh) | 2016-12-07 |
CN102226900A (zh) | 2011-10-26 |
CA2513852C (en) | 2013-05-28 |
US20060031195A1 (en) | 2006-02-09 |
BRPI0503778A (pt) | 2006-03-14 |
CN1728141B (zh) | 2011-09-07 |
CN102226899B (zh) | 2014-07-16 |
NO20053640D0 (no) | 2005-07-26 |
NO20053640L (no) | 2006-01-27 |
AU2005203238A1 (en) | 2006-02-09 |
CN102226899A (zh) | 2011-10-26 |
CN102226900B (zh) | 2017-04-12 |
EP1622054B1 (en) | 2011-08-24 |
EP1622054A1 (en) | 2006-02-01 |
CA2513852A1 (en) | 2006-01-26 |
CN102289462A (zh) | 2011-12-21 |
CN102289462B (zh) | 2014-07-23 |
KR101223172B1 (ko) | 2013-01-17 |
AU2005203238B2 (en) | 2008-10-23 |
CA2813644A1 (en) | 2006-01-26 |
JP5175005B2 (ja) | 2013-04-03 |
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