pn test 中文意思是什麼
pn test
解釋
蝕斑中和試驗-
Pn 16 cocks with adjusting nut and male connection and test connection for pressure gauges
壓力表用帶調節螺母軸套式連接和試驗連接的pn 16旋 -
This master ’ s degree thesis firstly introduces and discusses the principle of ofdm and the merged blue print for digital terrestrial television broadcasting in china, then proposes a scheme for the test platform of narrowband ldpc decoding efficiency based on fpga. this scheme includes techniques such as time - domain synchronization using pn and power estimation using pilots
本論文首先介紹並討論了數字電視傳輸標準tds - ofdm的實現原理，對其中的一些關鍵問題做了詳細的分析，在此基礎上提出了一種基於fpga的窄帶ldpc解碼-誤碼測試平臺設計方案，即利用時域pn頭同步及頻域導頻進行功率估計的fpga設計。 -
Methode competence is induced in the s. pn detached from clinic and creat the come duplicaion mutants by insertion - duplication. use the real - time rt - pcr to test the expressing level of vurilence between the mutants and the wild type
8的ctm中生長的菌作為陰性對照。分別在生長的不同時間點提取rna ，最後採用rea卜timert ? pcr來定量測定各種毒力因子mrna表達的水平。 -
Part 1 study on the antibiotic resistance of escherichia coil and klebsieua pneumoniae producing extended - spectrum beta - lactamases objective to investigate the prevalence of strains producing esbls among escherichia coil and klebsieua pneumoniae, look for the best detection substrate of these strains and determine the antibiotic resistance of them. methods 248 strains of e. coli. and 97 strains of k. pn from january to october, 2002 were investigated for production of extended - spectrum b - lactamases ( esbls ) by phenotypic screening and confirmatory test provided by the national committee for clinical laboratory standards ; compared the result of the phenotypic screening and confirmatory test to discuss the best detection substrate of these strains ; 16 kind of antibiotics were selected for antimicrobial susceptibility test for the resistance
方法對2002年1 ? 10月臨床分離的248株e . coli和97株k . pn ，採用美國臨床實驗室標準委員會（ nccls ）規定的esbls表型篩選和確證試驗，確定本地區esbls的發生率；通過對不同底物的初篩結果與確證試驗結果的比較，探討本地區臨床檢測產esbls菌株的最佳篩選底物；選擇16種抗生素紙片做藥敏試驗，了解產esbls的e . coli和k . pn的耐藥性。 -
Then taken four kinds of maps for examples, comparing with m - sequence, their properties are calculated, verifying the advantages of the chaotic sequence generated by the new method. after this, an improved scheme is discussed - - using m - sequence to change the sequence ’ s turn and verifying that the permutation parameters have effect on improving the sequence ’ s properties. in chapter 5, monte carlo simulation method is used to test performances of our sequences ’ applications in the given model of direct spread spectrum cdma system, and results of error rate of the system are given ; the comparing resuls of performances of anti - multi - access interference and anti - multi - address interference of different pn sequence is also shown in this thesis
本文首先對擴頻通信中常用二進制偽隨機序列的產生方法、性能特點進行了總結，指出了現有二進制偽隨機序列的應用局限性;其次，根據混沌非線性系統特徵，深入研究了混沌數字序列的產生方法;在此基礎上，提出了一種新的產生方法中間抽取法，然後，以四種混沌映射系統為例，對其所產生的混沌數字序列進行了偽隨機特性實驗數據分析，並與m序列進行比較，結果說明了混沌數字序列代替傳統擴頻序列的優點，同時驗證了新方法的可行性。 -
Pn 250 and pn 400 valves with test connection for pressure gauges
壓力表用帶試驗連接的pn 250和pn 400閥門 -
Pn 250 and pn 400 valves without test connection for pressure gauges
壓力表用不帶試驗連接的pn 250和pn 400閥門 -
Pn 250 and pn 400 valves with shut - off test connection for pressure gauges
壓力表用帶關閉試驗連接的pn 250和pn 400閥門
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