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to True, then auto-insert but this still has a problem, the original field will be lost this time need Upsert Setoninsert db.stu.update ({name :' Wuyong '}, {$set: {name:' Junshiwuyong '}}, {upsert:true}, {$setOnInsert: {gender:' Male '}}//Add the original field ); 12, query query all documents all content db.stu.find (); Query the gender property of all documents Db.stu.find ({},{gender:1}) queries the gender property of all documents and does not query the _id property Db.stu.find

DESC LIMIT 1Db.blog.find (). Skip (20) equals select * FROM blog limit 10,20Skip use, it is important to note that if the number of words skip will become very slow, all the database has this problem, you can skip paging, with the last record as a conditionDb.blog.find ({"Age": {"$gte": +, "$lte": ()}) select * from blog where age>=27 and age$GT >$gte >=$lt $lte $ne! =$in: In$nin: Not in$all: All$not: Anti

I. Turbo coding and decoding principleThe Turbo encoder is a parallel cascade convolutional encoding (Pccc,parallel concatenated convolutionalcode), which uses two 8-state sub-encoders and a turbo-in-code interleaving device. The code rate for the Turbo encoder is 1/3.Two. Emulation Link:Channel environment: Gaussian White NoiseSimulation parameters: R =1/3, constraint length =9,map interleaving: LTE interleaving deviceSimulation results:

records of age > Db.userInfo.find ({age: {$lte: 25}}); 8. Query age >= 23 and age > Db.userInfo.find ({age: {$gte: $lte: 26}}); 9. Query the data containing MONGO in name > Db.userInfo.find ({name:/mongo/}); Equivalent to: SELECT * from UserInfo where name like '%mongo% '; 10, query the name in the beginning of MONGO > Db.userInfo.find ({name:/^mongo/}); SELECT * from UserInfo where name is like ' mongo%

Tags: col style LTE ice query statement back greater--sanGossip lessFind the product information----The price is less than 200 contains the product name, the goods number, the price, adds the information and so onDb.goods.find ({"Shop_price": {$lt: $}},{"Shop_price":1,"Goods_name":1,"goods_id":1,"Add_time":1})Items not classified as 3Db.goods.find ({"cat_id": {$ne:3}},{"Shop_price":1,"Goods_name":1,"goods_id":1,"cat_id":1})Items with a price below or

with a key value of 0, which is excluded from the query results. Restriction: The value that is passed to the database query document must be a constant and cannot refer to the values of other keys in the document. Query criteria: Db.center.find ({"Age": {"$gte": $, "$lte": 30}})--scope query$lt: Less than $lte: less than and Equel $GT: Grate than $gte: grate than and Equel $ne: not Equel Db.center.find ({

"}}); Greater than (>) $gt Find all students older than 5db.student.find({"age":{$gt:5}}); Greater Than ( $lt Find students of all ages less than 15db.student.find({"age":{$lt:15}}); Greater than or equal to (>=) $gte Find all students older than or equal to 5db.student.find({"age":{$gte:5}}); Less than or equal (>=) $lte Find all students younger than

. createElenment ("......")! The Code is as follows: (Function (){Var element = ['header', 'footer ', 'Article', 'aside', 'region', 'nav', 'menu ', 'hgroup', 'details ', 'did', 'figure ', 'figcaption'],Len = element. length;While (len --){Document. createElement (element [I])}})(); This is just a simple creation of several typical html5 tags, so that they can become tags in IE6 \ 7 \ 8. Someone has already written a complete js file, and you only need to introduce it as follows: 《script》

, wit is also briefly introduced here, is nothing more than a few if judgment, hehe, but these judgments are not executed in the script, but directly in the HTML code execution, the following to introduce how to use it. Reference: Here is the normal HTML code Here xxx is some specific things, in this list a few out, detailed introduction of their respective meanings: ......The above is a few commonly used to judge the version of IE browser syntax, the following to introduce a rel

There is only one sentence in a page that can be judgedWe often see the form in the HTML of the page like [if LTE IE 9] ... The code for [ENDIF] represents a statement that restricts certain browser versions to execute, so what are the rules for these judgment statements? Please see below: Project Example Description ! [If! IE] The NOT operator. This was placed immediately in front of the feature, operat

=" http://www.powenko.com/wordpress/wp-content/uploads/ 2014/09/screen-shot-2014-09-09-at-10.13.13.jpg "alt=" screen Shot 2014-09-09 at 10.13.13 "width=" 560 "height=" 350 "/ >Now there's the 1.3 million APP650) this.width=650; "class=" Alignnone wp-image-5853 "src=" http://www.powenko.com/wordpress/wp-content/uploads/ 2014/09/screen-shot-2014-09-09-at-10.17.09.jpg "alt=" screen Shot 2014-09-09 at 10.17.09 "width=" 560 "height=" 362 "/ >You can listen to music for 80 hours of battery capacity.65

. Therefore, we need to define the following parameters. 1. The earliest event occurrence time ETV (earliest time of vertex): the earliest occurrence time of the vertex VK. 2. The latest event occurrence time LTV (latest time of vertex): the shortest occurrence time of the vertex VK. That is, the latest start time of the event corresponding to each vertex. exceeding this time will delay the entire construction period. 3. the earliest start time of the activity, ete (earliest time of edge), is th

Map> ulclass= "Nav-site">{pc:content action= "category" catid= "0" num= "siteid=" $siteid "order=" Listorder ASC "}Li>ahref= "{SiteURL ($siteid)}">span>Homespan>a>Li> Liclass= "line">|Li>{loop $data $k $v}Li>ahref= "{$v [url]}">{$v [catname]}[If IE 7]> -a> - [If LTE IE 6]> - ul>{pc:content action= "category" Catid= "$k" num= "siteid=" $siteid "order=" Listorder ASC "} { Loop $data $b $d}Li>ahref= "{$d [url]}">{$d

; title>Ie8title> Linkrel= "stylesheet"href= "Css/bootstrap/bootstrap.min.css"> [If LTE IE 9]> - Scriptsrc= "Js/bootstrap/jquery-1.12.0.min.js">Script> Scriptsrc= "Js/bootstrap/bootstrap.min.js">Script>Head>Body>Body>HTML>IE judge IE version of the statement:[If LTE IE 6]> -IE6 and the following versions are visible[If LTE IE 7]> -IE7 and the fo

the second time slot does not take the image of the PRB location has been determined, we can use this to reverse the introduction of N_HO_RB and f_hop values, and then you can calculate the second time slot in the mirror mode after the PRB location. Here is the calculation process:(Figure 9) from the above results, you can see that after the predefined frequency hopping pattern and image pattern are executed, the number 27th VRB will be mapped to the number 22nd PRB. Similarly, it can be inferr

} (0 [13578] | 1 [02]) 31) | (19 \ D {2} 02 (0 [1-9] | 1 \ d | 2 [0-8]) | (19 ([13579] [26] | [2468] [048] | 0 [48]) 0229) \ D {3} (\ d | x )? $ /, "Ip":/^ (\ D {1, 2} | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \. (\ D {1, 2} | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \. (\ D {1, 2} | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) \. (\ D {1, 2} | 1 \ D \ d | 2 [0-4] \ d | 25 [0-5]) $ /, "File":/^ [A-Za-z0-9] + (\. |-) [A-Za-z0-9] +) * \. [A-Za-z0-9] + $ /, "Image": //. + \. (JPG | GIF | PNG | BMP) $/I, "Word":/. +

Heterogeneous NetworksIn the process of integration, ZTE is based on the SDR Soft Base Station TechnologyThe Uni-RAN solution is fully qualifiedIt is widely recognized by more operators and has become a mainstream network construction model. Accelerating multi-network collaboration The coexistence of 2G/3G/WLAN/LTE and other networks has become a trend. With the introduction of Iot/sensor networks and the development of Smart Cities, multiple heteroge

Hidden sorrow in joy Recently, WiMAX supporters have experienced ups and downs. Poor aspects include the announcement last year that the US operator Sprint Nextel and Clearwire had terminated cooperation, and their intention to work together to build a mobile WiMAX network covering the entire United States was also abandoned halfway, this has aroused serious questions about the potential of this wireless technology. In addition, Verizon Wireless announced in last November that it would choose

2000, TD-SCDMA and WiMAX. CMU300 also supports the signaling and non-signaling RF tests of GSM base stations. Support for LTE As demand increases, the WCDMA technology is constantly changing and updated to meet people's needs for higher transmission rates. Rode and Schwarz keep up with the development of technology and maintain support for the latest test specifications in their products. For example, after HSPA, people proposed

method. Wi-Fi solves this problem. At the same time, many people in the industry are optimistic about this technology, including manufacturers, telecom operators, analysis institutions and other experts. "Wi-Fi is the most successful wireless technology invented by humans ." Huang Xiaoqing, president of the China Mobile Research Institute, said that the frequency of user use of Wi-Fi is 10 times that of mobile communication, and this proportion continues to expand. Li tingwei, president and vic