ERROR

Kami ingin memohon maaf - walaupun kami melakukan yang terbaik: Ralat berlaku
Typedatabase
MessageYou have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near "AND SUBSTRING(categories_id,4,1) != "0") AS cat4, (SELECT categorie..." at line 5
QuerySELECT (SELECT categories_id FROM categories_description WHERE language_id = 19 AND categories_id = 000) AS cat1, (SELECT categories_id FROM categories_description WHERE language_id = 19 AND categories_id = 00 AND SUBSTRING(categories_id,2,1) != "0") AS cat2, (SELECT categories_id FROM categories_description WHERE language_id = 19 AND categories_id = 0 AND SUBSTRING(categories_id,3,1) != "0") AS cat3, (SELECT categories_id FROM categories_description WHERE language_id = 19 AND categories_id = AND SUBSTRING(categories_id,4,1) != "0") AS cat4, (SELECT categories_name FROM categories_description WHERE language_id = 19 AND categories_id = 000) AS cat1name, (SELECT categories_name FROM categories_description WHERE language_id = 19 AND categories_id = 00 AND SUBSTRING(categories_id,2,1) != "0") AS cat2name, (SELECT categories_name FROM categories_description WHERE language_id = 19 AND categories_id = 0 AND SUBSTRING(categories_id,3,1) != "0") AS cat3name, (SELECT categories_name FROM categories_description WHERE language_id = 19 AND categories_id = AND SUBSTRING(categories_id,4,1) != "0") AS cat4name, (SELECT url_text FROM commerce_seo_url_without_language WHERE categories_id = 000) AS cat1url, (SELECT url_text FROM commerce_seo_url_without_language WHERE categories_id = 00 AND SUBSTRING(categories_id,2,1) != "0") AS cat2url, (SELECT url_text FROM commerce_seo_url_without_language WHERE categories_id = 0 AND SUBSTRING(categories_id,3,1) != "0") AS cat3url, (SELECT url_text FROM commerce_seo_url_without_language WHERE categories_id = AND SUBSTRING(categories_id,4,1) != "0") AS cat4url, (SELECT wod_count_products FROM categories WHERE categories_id = 000) AS cat1cnt, (SELECT wod_count_products FROM categories WHERE categories_id = 00 AND SUBSTRING(categories_id,2,1) != "0") AS cat2cnt, (SELECT wod_count_products FROM categories WHERE categories_id = 0 AND SUBSTRING(categories_id,3,1) != "0") AS cat3cnt, (SELECT wod_count_products FROM categories WHERE categories_id = AND SUBSTRING(categories_id,4,1) != "0") AS cat4cnt

John Davies 
Newnes Radio Engineer’s Pocket Book [PDF ebook] 

สนับสนุน

Newnes Radio Engineer’s Pocket Book focuses on various processes employed in radio engineering, including frequency, wavelength, radio waves, resonant circuits, and oscillators. The book first elaborates on the propagation of radio waves, decibel scale, and transmission lines. Discussions focus on radio frequency lines, impedance matching, waveguides, decibels referred to absolute values, radio frequency spectrum, formation and behavior of radio waves, and methods of propagation. The text then explores antennas, resonant circuits, oscillators, piezo-electric devices, and bandwidth requirements and modulation. The manuscript examines frequency planning, radio equipment, microwave communication, information privacy and encryption, and multiplexing. Topics include code division multiple access (CDMA), encryption principles, performance criteria for analogue and digital links, microwave usage, transmitters, receivers, and programmable equipment. The book also reviews broadcasting, connectors and interfaces, satellite communications, batteries, instrumentation, and base station site management. The publication is a valuable source of data for researchers interested in radio engineering.

€56.54
วิธีการชำระเงิน
ซื้อ eBook เล่มนี้และรับฟรีอีก 1 เล่ม!
ภาษา อังกฤษ ● รูป PDF ● ISBN 9781483193885 ● สำนักพิมพ์ Elsevier Science ● การตีพิมพ์ 2014 ● ที่สามารถดาวน์โหลดได้ 3 ครั้ง ● เงินตรา EUR ● ID 5732947 ● ป้องกันการคัดลอก Adobe DRM
ต้องใช้เครื่องอ่านหนังสืออิเล็กทรอนิกส์ที่มีความสามารถ DRM

หนังสืออิเล็กทรอนิกส์เพิ่มเติมจากผู้แต่งคนเดียวกัน / บรรณาธิการ

101,226 หนังสืออิเล็กทรอนิกส์ในหมวดหมู่นี้