broadcasting engineering 中文意思是什麼

Beijing seven - color ring technology products television limited is the development, production, marketing, and system engineering for the main business, the renowned products of complete autonomy in r & d and production arm of a large series of video products, its overall performance can be fully verified, the process equipment and its key components are world - class manufacturers, by the authority of physical abnormalities destructive testing and the safety of a number of patented technologies, a declaration rocker flying boat full compatibility broadcasting class, professional - level film cameras, video cameras, small hdtv cameras, boom achieve the same product serialization

北京七色光環科技發展有限公司是影視產品的開發、生產、銷售、及系統工程為主營業務，產品有享譽中外的完全自主研發生產的大型影視搖臂系列產品，其整機性能得以充分驗證，其工藝設備及其關鍵部件均由世界一流的廠商提供，通過權威物理異常破壞性的安全測試及多項專利技術的申報，飛行船搖臂全面兼容廣播級、專業級膠片攝影機、攝像機，小型高清攝像機，實現了同一臂型產品系列化！

The system is developed by ourselves on the basis of the project which is titled. multimedia broad bandwidth network engineering and been responsible by the author of this thesis. the hfc network transmission based techniques of internet dual access, user set - top - box access, stock broadcasting, standard video broadcasting, distant education, etc. are addressed. this system can provide information highway to telecommunication and tv broadcasting to run multimedia services and be suitable for the status of our nation and the economic burden of our public

本論文以作者負責的項目「山東勝利油田多媒體寬帶網路工程」為背景，闡述了本單位自主開發的「基於hfc網路多媒體寬帶傳輸系統」的原理、功能和技術特點，論述了基於hfc傳輸網路下的： internet雙向接入技術和用戶端機頂盒接入技術及股票發送、準視頻廣播、遠程教育等高速數據廣播技術在hfc網路工程中的實現，說明了該系統能夠為電信和廣電全面開展多媒體增值業務提供一套適合我國國情、滿足我國公眾經濟承受能力的信息高速公路完整解決方案。

The main products are audio power amplifiers, broadcasting controlled tables, large sound amplifying engineering, which is well know for a long time

本廠的聲頻功率放大器、播音控制桌椅、調音臺、大型音響擴聲工程等相關產品在國內久負盛名。

For shutters, the results show : 1 ) according to the formula p =, the theoretical value of is calculated by the effective velocity of the flow, and its engineering value is calculated by the arriving velocity of the flow, the relationship between the theoretical value of and its engineering value is 2 ) the smaller value of declining angle will result in the smaller pressure loss and smaller outlet velocities. as a result, the declining angle of 30 擄 or less is recommended in some places which need small wind velocity, such as broadcasting studio and library, and the declining angle of 45 擄 or less is recommended in places which need big wind velocity, such as cinema and office ; 3 ) the larger value of ratio between the wide of the shutter b and the space between two boards h ( b / h ) will result in the larger pressure loss and smaller outlet velocities. the range of b / h from 0. 8 to 2. 0 and the optimum value 1. 2 is recommended ; 4 ) the range of b from 10 mm to 50 nun and the optimum value 40 mm is recommended ; 5 ) the proper thickness of the boards 8 of the shutters is 1. 5 mm ; 6 ) cuneiform boards should replace the rectangle inlet boards of the shutters in order to obtain better ventilation

數值模擬採用fluent軟體，計算結果用excel進行處理，通過對大量數值工況進行數值模擬計算，結果表明：對于單側百葉風口，計算表明： 1 ）對于公式p = （ ~ 2 ） 2 ，的理論計算值中定義為流體流經百葉風口內部時的速度，即有效速度，而工程上常使用流體的來流速度來計算，計算表明，的理論計算值與工程應用值的關系為（ _ （理論） ） （ _ （工程） ） = 0 . 813 ； 2 ）當來流速度一定時，擋板傾斜角度越小，壓力損失越小、出口速度越小；因此在要求進口風速比較小的場所，如播音室、圖書館等，宜採用擋板角度30的百葉風口；在要求進口風速比較大的場所，如電影院、辦公室等，百葉擋板的角度應選45 ； 3 ）當來流速度一定時，百葉擋板的擋板寬度b與擋板間距h的比值b h越大，壓力損失越大，出口速度越小，計算表明，鑒于壓力損失、出口風速、板間形成渦流區的大小，百葉擋板的b h值取0 . 8到2 . 0之間， b h = 1 . 2為最佳值； 4 ）當來流速度一定時，在計算的條件下，當百葉擋板寬度b = 40mm時，百葉擋板的阻力系數最小，考慮到渦流區等的影響，建議選用10mm b 50mm的百葉擋板；西安建築科技大學碩士學位論文5 ）百葉擋板的厚度取為1 . sinln為好; 6 ）百葉擋板的入口側可選用具有傾斜度的楔形擋板來代替矩形擋板，利用其較好的導流作用，可得到更好的出流效果。

Our company had been established in 1997, specializes in building intelligent systems engineering design, construction and terminal equipment ( building automation systems, access control, tv monitoring systems, computer network system, digital voice switching systems, public broadcasting systems, smart card system ) agent sales, installation, commissioning, maintenance

公司成立於1997年，專業致力於建築智能化系統工程設計、施工和終端設備（樓宇自控系統，門禁系統，電視監控系統，計算機網路系統，數字語音交換系統，公共廣播系統，智能一卡通系統等）的代理銷售、安裝、調試、維護。

Based on its strong technology and economy foundation, the mastery of core technology in safe guard engineering, network communication and digital video, the company successfully implemented many projects in many social fields, such as in government, water conservancy department, commercial, education, large scale enterprise and police with the gaining of great social efficiency, which the projects include multilevel remote monitoring system, public security guard system, closed - circuit television, large - scale network communication, network education, multimedia network alternate education platform, multimedia conference system, multimedia video ordering system, digital video recording, and video broadcasting application

憑借強大的技術和經濟實力以及公司在安防監控工程、網路通訊和數字視頻技術領域所掌握的核心技術，本公司先後成功的實施了多級遠程監控系統、治安監控系統、閉路電視監控系統、大型網路傳輸工程、網路教學系統、多媒體網路交互教學平臺、多媒體會議系統、多媒體視頻點播系統、數字錄像、視頻廣播等工程已在政府、水利、金融、教育、大型企業、公安等多個行業中被廣泛應用，並取得了良好的社會效益。

Class a of electronics engineering of electronics telecommunication, broadcasting and television fields, class a of building engineering, class a of chemical, petro - chemical, and pharmaceutical fields, class a of municipal public facilities fields environment hygiene, class a of military industry fields opticals, optical - electronicals, electronicals engineering

：電子通信廣電行業電子工程類甲級建築行業建築工程甲級化工石化醫藥行業甲級市政公用行業環境衛生甲級，軍工行業光學光電電子工程甲

After 30 years development, < radio & tv broadcast engineering > has become the most influential technological journal in the broadcasting field

《廣播與電視技術》歷經30年的發展，已經成為廣播電視界最具有影響力的技術期刊。

As one of the most historic national excellent scientific and technological journal and a professional key journal, < radio & tv broadcast engineering > has been serving for many scientific and technical professionals, providing the most authoritative and credible information for managers and technical professionals, doing an indelible job for the development of the broadcasting enterprise

《廣播與電視技術》作為廣電系統歷史最悠久的國家級優秀科技期刊和專業核心期刊，長期以來服務于廣電系統的廣大科技工作者，為業界管理者和技術人員提供最權威、最可靠的信息資訊，為廣播電視事業的發展建立了不可磨滅的業績。

Radio & tv broadcast engineering >, which has cultivated many professionals for 30 years, will depend on and integrate the enormous information resources and networks, keep up with the latest development of techniques, learn the excellent modes of management and experience, report important affairs home and abroad, research the hot spots in the broadcasting field, build a communication bridge for professionals, exchange information and improve development of this field ' s techniques

《廣播與電視技術》 30年來培養了眾多科技人才，今後，將繼續依靠和整合龐大的信息資源和網路優勢，密切跟蹤國內外最新技術的發展，並借鑒和學習國內外優秀的行業運營管理模式和經驗，及時報道國內外的重大事件，深入挖掘行業熱點，廣泛收集業內外信息，積極推動廣播電視行業的科技發展，架起國內外同行交流的橋梁。