In this letter, the communication transmitter transient signals are analyzed based on the time-variant hierarchy exponents of multifractal analysis. The species of optimized sample set is selected as the template of t...In this letter, the communication transmitter transient signals are analyzed based on the time-variant hierarchy exponents of multifractal analysis. The species of optimized sample set is selected as the template of transmitter identification, so that the individual communication transmitter identification can be realized. The turn-on signals of four transmitters are used in the simulation. The experimental results show that the multifractal character of transmitter transient signals is an effective character of individual transmitter identification.展开更多
The effect of four bottom substrates, oyster shell powder(OP), sugarcane bagasse(SB), a mixture of OP and SB(OS) and fresh soil(FS), on the water quality and bacterial and zooplankton density of intensive shrimp(Litop...The effect of four bottom substrates, oyster shell powder(OP), sugarcane bagasse(SB), a mixture of OP and SB(OS) and fresh soil(FS), on the water quality and bacterial and zooplankton density of intensive shrimp(Litopenaeus vannamei) culture tanks without water change and the growth performance of cultured shrimp were compared in this study. At the end of a 110 days culturing trial, the total ammonium-N(TAN) of the water on SB and the nitrite nitrogen(NO2-N) on OS was significantly lower than that on the other substrates(P<0.05), which coincided with the high density of ammonium- and nitrite-oxidizing bacteria in the water on SB and OS, respectively. The concentration of chlorophyll a(Chl a) increased slowly on OP, SB and OS but remained low on FS. The density of total bacteria on OP, SB and OS was one order of magnitude higher than that on FS, and the density of zooplankton on SB and OS was significantly higher than that on FS or OP(P<0.05). The improved water quality and increased density of bacteria and zooplankton on SB and OS may have had a synergistic effect on shrimp culture, improving its growth performance(high survival rate and yield and low feed conversion rate). SB and OS were more effective for improving the growth performance of intensively cultured L. vannamei without water change than OP and FS. To our knowledge, this study presents the first evidence regarding the effect of different bottom substrates on intensive shrimp culture.展开更多
Objective As there is currently no clear recommendation for third-line chemotherapy for small cell lung cancer （SCLC）, its efficacy is unknown. To date, there have rarely been reports of Chinese patients with SCLC w...Objective As there is currently no clear recommendation for third-line chemotherapy for small cell lung cancer （SCLC）, its efficacy is unknown. To date, there have rarely been reports of Chinese patients with SCLC who received third-line chemotherapy. Therefore, we investigated the efficacy, safety, and prognostic factors of Chinese patients with SCLC treated with third-line chemotherapy. Methods A retrospective analysis of patients with SCLC who received third-line chemotherapy was performed. Results Between 2007 and 2013, 62 patients [62 men （75.6%）, 20 women （24.4%）; median age at the time of diagnosis, 55 years] received third-line chemotherapy at our center. Of these patients, 44 had limited-stage disease and 38 had extensive-stage disease. On third-line chemotherapy, 55 （67.1%） patients had an Eastern Cooperative Oncology Group performance status （ECOG PS） of 0-1, objective response rate of 15.9%, and median overall survival after third-line chemotherapy （OS-3） and median progres- sion-free survival after third-line chemotherapy （PFS-3） of 5.6 months and 3.0 months, respectively. On univariate analysis, PFS-3 was significantly related with ECOG PS （P = 0.005）, response to second-line chemotherapy （P = 0.002）, response to third-line chemotherapy （P 〈 0.001）, and PFS after second-line chemotherapy （P = 0.026）. OS-3 was significantly related with ECOG PS （P 〈 0.001）, response to third-line chemotherapy （P = 0.033）, PFS after first-line therapy （P = 0.044）, and PFS after second-line therapy （PFS-2） （P = 0.007）. On multivariate analysis, ECOG PS （P = 0.008） and response to third-line chemotherapy （P = 0.046） were independent prognostic factors for PFS-3, while ECOG PS （P = 0.007） and PFS-2 （P 〈 0.001） were independent prognostic factors for OS-3. Conclusion Few patients with SCLC receive third-line chemotherapy. Our findings suggest that patients with an ECOG PS 0-1 and PFS-2 for 〉3 months will be benefit from third-line chemotherapy, which should be actively offered to them.展开更多
文摘In this letter, the communication transmitter transient signals are analyzed based on the time-variant hierarchy exponents of multifractal analysis. The species of optimized sample set is selected as the template of transmitter identification, so that the individual communication transmitter identification can be realized. The turn-on signals of four transmitters are used in the simulation. The experimental results show that the multifractal character of transmitter transient signals is an effective character of individual transmitter identification.
基金supported by National Science and Technology Supporting Program of the Twelfth Five-Year Plan of China (2011BAD13B10)the Special Fund for Agro-scientific Research in the Public Interest, China (201103034)
文摘The effect of four bottom substrates, oyster shell powder(OP), sugarcane bagasse(SB), a mixture of OP and SB(OS) and fresh soil(FS), on the water quality and bacterial and zooplankton density of intensive shrimp(Litopenaeus vannamei) culture tanks without water change and the growth performance of cultured shrimp were compared in this study. At the end of a 110 days culturing trial, the total ammonium-N(TAN) of the water on SB and the nitrite nitrogen(NO2-N) on OS was significantly lower than that on the other substrates(P<0.05), which coincided with the high density of ammonium- and nitrite-oxidizing bacteria in the water on SB and OS, respectively. The concentration of chlorophyll a(Chl a) increased slowly on OP, SB and OS but remained low on FS. The density of total bacteria on OP, SB and OS was one order of magnitude higher than that on FS, and the density of zooplankton on SB and OS was significantly higher than that on FS or OP(P<0.05). The improved water quality and increased density of bacteria and zooplankton on SB and OS may have had a synergistic effect on shrimp culture, improving its growth performance(high survival rate and yield and low feed conversion rate). SB and OS were more effective for improving the growth performance of intensively cultured L. vannamei without water change than OP and FS. To our knowledge, this study presents the first evidence regarding the effect of different bottom substrates on intensive shrimp culture.
基金Supported by grants from the Jilin Health and Family Planning Commission Scientific Research Project(No.2014Z014)the "12th Five" Project of National Key Subject of New Drug Innovation(No.2013ZX09104001)
文摘Objective As there is currently no clear recommendation for third-line chemotherapy for small cell lung cancer （SCLC）, its efficacy is unknown. To date, there have rarely been reports of Chinese patients with SCLC who received third-line chemotherapy. Therefore, we investigated the efficacy, safety, and prognostic factors of Chinese patients with SCLC treated with third-line chemotherapy. Methods A retrospective analysis of patients with SCLC who received third-line chemotherapy was performed. Results Between 2007 and 2013, 62 patients [62 men （75.6%）, 20 women （24.4%）; median age at the time of diagnosis, 55 years] received third-line chemotherapy at our center. Of these patients, 44 had limited-stage disease and 38 had extensive-stage disease. On third-line chemotherapy, 55 （67.1%） patients had an Eastern Cooperative Oncology Group performance status （ECOG PS） of 0-1, objective response rate of 15.9%, and median overall survival after third-line chemotherapy （OS-3） and median progres- sion-free survival after third-line chemotherapy （PFS-3） of 5.6 months and 3.0 months, respectively. On univariate analysis, PFS-3 was significantly related with ECOG PS （P = 0.005）, response to second-line chemotherapy （P = 0.002）, response to third-line chemotherapy （P 〈 0.001）, and PFS after second-line chemotherapy （P = 0.026）. OS-3 was significantly related with ECOG PS （P 〈 0.001）, response to third-line chemotherapy （P = 0.033）, PFS after first-line therapy （P = 0.044）, and PFS after second-line therapy （PFS-2） （P = 0.007）. On multivariate analysis, ECOG PS （P = 0.008） and response to third-line chemotherapy （P = 0.046） were independent prognostic factors for PFS-3, while ECOG PS （P = 0.007） and PFS-2 （P 〈 0.001） were independent prognostic factors for OS-3. Conclusion Few patients with SCLC receive third-line chemotherapy. Our findings suggest that patients with an ECOG PS 0-1 and PFS-2 for 〉3 months will be benefit from third-line chemotherapy, which should be actively offered to them.
