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具体步骤:
1、创建 Project
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Hello-
I have an unusual problem perhaps someone could shed some light on:
I have a TR-4 in 29K serial range that functions normally
except it will not go back into receive, until after approx 30 second
delay, after the mic button is released or the function switch turned
back to "SSB". This condition worsens (longer delay) the more you
frequently you transmit. The sidetone disappears but T-R relay will
not release.
I have tried different known-good 6EV7 tubes, have replaced a lot
of the coupling / bypass caps in T-R circuits, did resistance /
voltage checks, adjusted the VOX / VOX delay controls, tried other
tubes in T-R circuit, etc. to no avail.
What is real curious about this is that while waiting for it to go
back into receive and T-R relay is engaged, IF YOU PULL THE 6EV7 FROM
ITS SOCKET THE T-R RELAY STILL DOES NOT RELEASE. I suspect the issue
is with the lead that goes from T-R relay coil to pin #1 on 6EV7
(somehow allowing enough leakage to ground?) or could it be the T-R
relay coil itself I made sure socket / pins and all are clean on 6EV7.
Any help appreciated, thanks.
Perplexed,
Byron WA5THJ.
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Dictionary编码:字典编码是将所有此维度下的值构建成一张映射表,从而大大节约存储空间。另外,字典是保持顺序的,这样可以使得在HBase中进行比较查询的时候,依然使用编码后的值,而无须解码。Dictionary的优势是,产生的编码非常紧凑,尤其在维度的值基数小且长度大的情况下,Dictionary编码特别节约空间。由于产生的字典在使用时加载进构建引擎和查询引擎,所以在维度的基数大、长度也大的情况下,容易造成构建引擎或者查询引擎的内存溢出。在Apache Kylin中,字典编码允许的基数上限默认是500万(由其参数“kylin.dictionary.max.cardinality”配置)。
Date编码:将日期类型的数据使用三个字节进行编码,支持从0000-01-01到9999-01-01中的每一个日期。
Time编码:仅支持表示从1970-01-01 00:00:00到 2038-01-19 03:14:07的时间,且Timestamp类型的维度经过编码和反编码之后,会失去毫秒信息,所以说Time编码仅仅支持到秒。但是Time编码的优势是每个维度仅使用四个字节,相比普通的长整数编码节约了一半空间。如果能够接受秒级的时间精度,可以选择Time来编码代表时间的维度。
Integer编码:Integer编码适合于对int或bigint类型的值进行编码,它无须额外存储,同时可以支持很大的基数。使用时需要提供一个额外的参数“Length”来代表需要多少个字节。“Length”的长度为1~8。如果用来编码int32类型的整数,可以将“Length”设为“4”;如果用来编int64类型的整数,可以将“Length”设为“8”。在多数情况下,如果我们知道一个整数类型维度的可能值都很小,那么就能使用“Length”为“2”甚至是“1”的int编码来存储,这能够有效避免存储空间的浪费。
Fixed_length编码:该编码需要提供一个额外的参数“Length”来代表需要多少个字节。对于基数大、长度也大的维度来说,使用Dict可能不能正常执行,于是可以采用一段固定长度的字节来存储代表维度值的字节数组,该数组为字符串形式的维度值的UTF-8字节。如果维度值的长度大于预设的Length,那么超出的部分将会被截断。此编码方式其实只是将原始值截断或补齐成相同长度的一组字节,没有额外的转换,所以空间效率较差,通常只是一种权宜手段。
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在构建时 Apache Kylin允许在Advanced Column Family中对度量进行分组(如图2-22所示)。如果有超过一个的 COUNT DISTINCT 或 Top_N 度量, 你可以将它们放在更多列簇中,以优化与HBase 的I/O。M V mThe translated version of this book is available in Spanish, English, Chinese, Russian, Hindi, Bengali, Arabic, Portuguese, Indonesian / Malaysian, French, Japanese, German and many others for free download.OA A
在刷新的同时,Cube仍然可以被查询,只是返回的是陈旧数据。当Segment刷新完毕后,新Segment会立即生效,查询开始返回最新的数据。原Segment则成为垃圾,等待回收。D Ch
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亚博正规吗?亚博体育是正规的吗?亚博网站是正规的吗
在一个项目下,如果有多个基于同一模型的Cube,而且它们都满足查询对表、维度和度量的要求,Apache Kylin会挑选一个“最优的”Cube来进行查询。这是一种基于成本(cost)的选择,Cube的成本计算涉及多方面因素,如Cube的维度数、度量、数据模型的复杂度等。 q Q h半个世纪以前,图像识别就已经是一个火热的研究课题。mT q
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Slowly I started acquiring tickets from various teams through mini plans and season tickets. What I learned is try to make a little money on the regular season and then pray, and I mean pray that the team makes a deep playoff run. After years, and a much larger bank roll, I was able to learn the art of profiting from sports tickets.J A eSlowly I started acquiring tickets from various teams through mini plans and season tickets. What I learned is try to make a little money on the regular season and then pray, and I mean pray that the team makes a deep playoff run. After years, and a much larger bank roll, I was able to learn the art of profiting from sports tickets.Cc c
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CUL, Byron.
----- Original Message -----
From: "Garey Barrell" <[EMAIL PROTECTED]>
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元数据重载完成后你可以在左上角的Project中看到一个名为learn_kylin的项目,它包含kylin_sales_cube和kylin_streaming_cube, 它们分别为batch cube和streaming cube,你可以直接对kylin_sales_cube进行构建,构建完成后就可以查询。VI hD IZ
CUL, Byron.
----- Original Message ----- From: "Garey Barrell" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, April 29, 2008 1:46 PM
Subject: Re: [drakelist] TR-4 TX Hang-Up
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