索引块

If we are reading a slice of columns, we use the row-level column index to find where to start reading, and deserialize block-at-a-time (where "block" is the group of columns covered by a single index entry) so we can handle the "reversed" case without reading vast amounts into memory

如果读取的是列集合，那就要用行级列索引查找从读取的起始位置并且反序列化每个块（"块"就是单个索引所覆盖到的一组列），这样我们不需要大量占用内存就可以处理"逆向"情况。

More emphasis is given to study the rule of data blocking and common method of building tile-pyramid model and linear quadtree tile-index. On the other hand, this thesis also investigates such problems as target-tile searching, tile-request prediction and edge matching of block terrain drawing.

着重分析了地形数据的分块规，构建瓦片金字塔模型和线性四叉树瓦片索引的一般方法，对目标瓦片搜索、瓦片请求预测及分块地形绘制接边等问题进行了探索性研究。

The method includes establishing one reverse mapping list comprising list items; reading the mapping data recorded in the data block state list item area to the list items during system initialization; checking reverse mapping list and finding the data block in Flash memory during reading some logic block; and writing the updated data into the empty data area of one new data block, writing the mapping data between the new logic block and the new data block into the state list item area and updating the mapping data of the corresponding list item in the reverse mapping list during writing some logic blcok.

包括：建立一个由表项组成的反向映射表，一个表项对应一个逻辑块；在系统初始化过程中，将数据块状态表项区中记录的映射信息，按逻辑块号与表项间的对应关系读取到各表项中；读取某逻辑块时，以其逻辑块号作为表项索引查找反向映射表，定位到表项，根据表项中记录的映射信息，在Flash存储器件中查找到数据块；写入某逻辑块时，将更新数据写入一新数据块的空白数据区中和将该逻辑块与新数据块间的映射信息写入状态表项区中，同时更新反向映射表相应表项的映射信息。

Mapping from logical to physical in a file of maximum size of 256K words and block size of 512 words. We need only 1 block for index table.

为了从逻辑映射到实际的文件系统，一个256K字的文件，块为512字，我们只需一个块作为索引表

However, rather than always being stored in the same single 'hot' index block, new entries will be spread across a number of existing blocks (assuming the index has been around for a while) thus reducing contention.

但是，与总是存储到同一个"热"块中不同，新的项目将分摊到多个已有的块（假定索引已运作了一段时间）中。

Then, it sends the master a request containing the file name and chunk index. The master replies with the corresponding chunk handle and locations of the replicas.

然后，客户端向master发送一个请求，包含文件名和块索引。master响应对应的块句柄和复本的位置。

This paper proposes an encoding compression method, which is similar to a dictionary index. To compress test data, the data blocks which are compatible with the reference data blocks are marked by "1" in the proposed method. Its decompression architecture requires only a finite state machine and a cyclical scan register whose length is the same as that of the data block.

提出一种类似于字典索引的编码压缩方法，将与参考数据块相容的测试数据块用"1"标记来压缩测试数据，解压体系结构只需要一个有限状态机和一个与数据块等长的循环扫描移位寄存器。

In the inverted index structure, the posting list of each term is partitioned into linked blocks, whose sizes form an arithmeticalseries.

在建立倒排索引时，每个词项的记录表以链接块的形式存放于倒排索引文件中，每次新分配的块大小递增。

The method comprises searching the undermost leaf node corresponding to a key word in a pre-established index tree; acquiring a block corresponding to the leaf node in the pre-stored IP address area of the virtual private network and corresponding index information, wherein the block comprises one or more consecutive IP address area and corresponding index information; acquiring the IP address area to which the key word belongs in the block; and searching the routing list corresponding to the index information according to the indexing information corresponding to the IP address area.

所述方法包括：在预先建立的索引树中查找关键字对应的最下层的叶子节点；在预先存储的虚拟私用网的IP地址区间和对应的索引信息中，获取叶子节点对应的块，该块包括一个或多个连续的IP地址区间和相应的索引信息；在该块内获取关键字所属的IP地址区间；根据该IP地址区间对应的索引信息，找到该索引信息对应的路由表项。所述装置包括：查找模块和获取模块。

By reversing the keys of the index, the insertions become distributed across all leaf keys in the index.

通过使索引的键值逆序排列，可以使插入操作分布在索引的全部叶块中。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。