A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 109
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

A PHP Error was encountered

Severity: Notice

Message: Trying to access array offset on value of type null

Filename: models/Site_model.php

Line Number: 233

Backtrace:

File: /var/www/html/KOL/voice/application/models/Site_model.php
Line: 233
Function: _error_handler

File: /var/www/html/KOL/voice/application/controllers/Exitpage.php
Line: 110
Function: get_keyword_cat

File: /var/www/html/KOL/voice/public/index.php
Line: 319
Function: require_once

疑難雜症萬事通 - 正方晶體 - 前往 https://researchoutput.ncku.edu.tw/zh/studentTheses/正方柱彈性聲子晶體的拓樸能谷邊緣態分析
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並前往 https://researchoutput.ncku.edu.tw/zh/studentTheses/%E6%AD%A3%E6%96%B9%E6%9F%B1%E5%BD%88%E6%80%A7%E8%81%B2%E5%AD%90%E6%99%B6%E9%AB%94%E7%9A%84%E6%8B%93%E6%A8%B8%E8%83%BD%E8%B0%B7%E9%82%8A%E7%B7%A3%E6%85%8B%E5%88%86%E6%9E%90

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