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    Performance analysis for pseudo-random asynchronous FH-CDMA system based on average-hit method by GTao ZHEN, Qi ZENG

    Published 2016-07-01
    “…The pseudo-random M-ary sequence (such as RS code,polynomial code and low-hit zone FH code and so forth) is widely adopted as FH code in FH-CDMA system.However,the performance of FH-CDMA system employing FH sequence is usually evaluated by simulation,and lack of substantial theoretical analysis.A systematic method for modeling the frequency-hit according to the pre-assigned FH code was proposed; then with the proposed model,the analysis for multi-access interference(MAI)was simplified.The numerical relation between the properties of pseudo-random FH code and the error-rate performance of FH-CDMA system was established.Theoretical and simulation results show that the proposed average-hit model is an efficient method to evaluate the frequency hit and the error-rate of pseudo-randomly FH-CDMA system.Meanwhile,the optimal error-rate low-bound of FH-CDMA system which can achieved by pseudo-random FH code is shown in the conclusion.…”
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    Stability Analysis of a Class of Switched Nonlinear Systems with an Improved Average Dwell Time Method by Rongwei Guo

    Published 2014-01-01
    “…This paper investigates the stability of switched nonlinear (SN) systems in two cases: (1) all subsystems are globally asymptotically stable (GAS), and (2) both GAS subsystems and unstable subsystems coexist, and it proposes a number of new results on the stability analysis. Firstly, an improved average dwell time (ADT) method is presented for the stability of such switched system by extending our previous dwell time method. …”
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    Temporal variability of average and low flows in Slovak rivers: A 90-year perspective by Pavla Pekárová, Dana Halmová, Veronika Bačová Mitková, Jana Poórová, Lotta Blaškovičová, Ján Pekár, Igor Leščešen, Zbyněk Bajtek

    Published 2025-08-01
    “…New hydrological insights for the region: This is the first national-scale assessment of Slovak rivers using such a long continuous daily discharge dataset. The analysis reveals a marked spatial gradient in discharge trends: while mountainous regions (Region I) show stable or increasing flow conditions, lowland regions (Region III) experience significant declines — up to 27 % in average annual flow and 23 % in 7-day minimum flows. …”
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    Prevalence of autoimmune diseases is strongly associated with average annual temperatures: systematic review and linear regression analysis by Konstantinos Voskarides, Sofia Philippou, Mariam Hamam, Konstantinos Parperis

    Published 2025-07-01
    “…Results The linear regression analysis showed a strong correlation between average annual temperatures and age-standardized prevalence rates (p < 0.0001) across 201 countries. …”
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