Wyniki wyszukiwania

1

Low to middle vibro-acoustic noise prediction in ship cabin by using plate-cavity coupling model

100%

Zhou Z., Wu J.

Polish Maritime Research

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2018

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tom 25

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nr Special Issue S2

A plate-cavity coupling method based on modal expansion technique in the closed sound cavity was introduced, aiming at ship cabin structural noise. Using this method, a coupled equation was established. The structural vibration acceleration of the target cabin was extracted from a ship vibration response calculation, applied to the model. Then the target cabin noise value was obtained through numerical calculation. The effectiveness and reliability of the method were validated through experiments. The coupled model predicts noise in the cabin does not require fluid finite element model of the cabin air, thus greatly reducing the calculation time compared with the pure finite element method. It was shown that the method is suitable for the calculation of noise in a single ship cabin; the method has a high calculation efficiency. Furthermore, the calculated result is a continuum. On the one hand, it can be conveniently converted to an octave or 1/3 octave according to the specification. On the other hand, the form of the continuum also provides a corresponding response to the subsequent vibration and noise control

2

Effects of exogenously supplied sucrose on OsSUTs and OsSPSs transcript abundances and rice root ammonium assimilation

81%

Zhou Z., Yuan Y., Zhou W., Zhang C.

Acta Physiologiae Plantarum

|

2016

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tom 38

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nr 12

3

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New bird remains from the Middle Eocene of Guangdong, China

81%

Wang M., Mayr G., Zhang J., Zhou Z.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 3

We describe a new avian taxon (Sanshuiornis zhangi gen. et sp. nov.) from Middle Eocene black oil shales in the Huayong Formation of Guangdong Province, south China. The specimen consists of a distal tibiotarsus and a complete foot with tarsometatarsus and pedal digits in articulation. A preliminary phylogenetic analysis does not resolve the affinities of the fossil, but the bones show resemblances to some “ciconiiform” birds. The peculiar hypotarsus morphology, which is block−like and exhibits four cristae, resembles that of the early Eocene Rhynchaeites, which is a stem group representative of the Threskiornithidae. The new Chinese fossil has, however, proportionally longer legs than Rhynchaeites and its phylogenetic affinities probably cannot be resolved without further material.

4

Seedling growth, root development and nutrient use efficiency of Cypress clones in response to calcium fertilizer

81%

Zhang Z., Jin G., Zhou Z.

Dendrobiology

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2020

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tom 84

5

Associations between polymorphism in the 2,4-dienoyl-CoA reductase 1 gene (DECR1) and growth traits of Shanxi White pig

81%

Li B., Guo X., Cao G., Zhou Z.

Animal Science Papers and Reports

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2011

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tom 29

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nr 4

A polymorphism within exon 2 of the 2, 4-dienoyl-CoA reductase gene (DECR1) was investigated by PCR-SSCP in 228 Shanxi White pigs. An association between the DECR1 polymorphism and growth traits in Shanxi White pigs was determined with an univariate animal model. The polymorphism was found within exon 2 of the DECR1, giving rise to genotypes AA, BB or AB. This polymorphism exhibited a significant effect of generation and sex (P<0.05, P<0.01) on growth traits and backfat thickness. At the age of six months BB pigs showed the body weight and chest girth higher than AA and AB animals. However, the polymorphism revealed no significant effects on other growth traits (P>0.05) though a trend of BB>AB>AA was showed.

6

Optimized design and analysis of offshore Beidou Maritime Foundation reinforcement system pseudolite ranging-codes

81%

Su D., Zhou A., Zhou Z., Chen W.

Polish Maritime Research

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2017

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tom 24

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nr Special Issue S2

Under the bad sea conditions and weak Beidou navigation signal environment, it is difficult to locate the ship on the sea, and the Beidou navigation system can’t work well. Beidou pseudolite system can improve the performance of Beidou navigation system as a navigation signal transmitter fixed on the ground, the signal of which can improve satellite positioning constellation structure, and improve the system availability reliability and precision. In order to ensure the interoperability and non-correlation of the Beidou pseudolite and the Beidou navigation system, the pseudolite ranging-codes should be selected in the same code space of the satellite ranging-codes and the residual pseudo random code generated by the 2 taps design scheme does not satisfy the performance requirements of the ranging-codes. To solve this issue, a combined design scheme with 3 taps is proposed, and 12 kinds of pseudolite ranging-codes are optimally selected according to the optimum design parameters of ranging-codes. The waveform and correlation of the selected pseudolite ranging-codes are analyzed by MATLAB, the acquisition simulation is carried out by using the new pseudolite ranging-codes. The experimental results show that the new 3-taps based ranging codes design scheme behaves a good balance, correlation and spectral characteristics

7

Associated growth of C3 and C4 desert plants helps the C3 species at the cost of the C4 species

71%

Su P., Yan Q., Xie T., Zhou Z., Gao S.

Acta Physiologiae Plantarum

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2012

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tom 34

|

nr 6

C₃ desert plant Reaumuria soongorica (RS-C₃) and C₄ desert plant Salsola passerina (SP-C₄) may exist either in individual or in associated communities. Carbon isotope composition, leaf water potential, gas exchange and chlorophyll fluorescence characteristics of the individual and associated communities were compared with reveal, whether the associated growth represent an advantage under harsh habitat. The results showed that the δ¹³Cvalues of leaves ofRS-C₃ and SP-C₄ across different habitats fluctuated, respectively, from-24 to-27 ‰ and from-14 to-16 ‰. Leafwater potential of RS-C₃ was lower than SP-C₄ all day long, growing either individually or associated with the C₃ plant. When associated with the C₄ plant, the net photosynthetic rate of the RS-C₃ increased, and the photosynthetic rate of the partner SP-C₄ decreased. The transpiration rates of the associatedRS-C₃ and SP-C₄ were both lower than in their individual colonies. In associated communities, in RS-C₃, the maximal photochemical efficiency, the effective photochemical efficiency, the relative electron transport rate, the photochemical quenching of PS II increased, and the non-photochemical quenching of PS II decreased; all these parameters changed oppositely in the SP-C₄ plant.This shows that, in the associated community, the C₄ plants might facilitate adaptation of the RS-C₃, while SP-C₄ plant can adapt to the harsh environment through their own specialties. The association favored the expression of natural photosynthetic characteristics and survival of RS-C₃, while retarded the growth of SP-C₄. Associated growth decreases the transpiration rate of the whole community; it is conducive to improve its water use efficiency.

8

A high-efficiency Agrobacterium tumefaciens mediated transformation system using cotyledonary node as explants in soybean (Glycine max L.)

71%

Yang X.-F., Yu X.-Q., Zhou Z., Ma W.-J., Tang G.-X.

Acta Physiologiae Plantarum

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2016

|

tom 38

|

nr 03

9

Antimicrobial resistance and virulence factor gene profiles of Enterococcus spp. isolated from giant panda oral cavities

71%

Zhong R., Zhou Z., Liu H., Zhong Z., Peng G.

Journal of Veterinary Research

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2021

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tom 65

|

nr 2

10

Effects of potassium deficiency on the enzymatic changes in developing cotton fibers

71%

Hu W., Yang J., Wang S., Chen B., Zhou Z.

Acta Physiologiae Plantarum

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2018

|

tom 40

|

nr 05

11

Provenance-specific climate sensitivity of Pinus massoniana – a multi-environmental trial in subtropical China

71%

Zhang Z., Jin G., Feng Z., Sun L., Zhou Z.

Dendrobiology

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2021

|

tom 85

12

Genotypic differences in some physiological characteristics during cotton fiber thickening and its influence on fiber strength

61%

Zhang W., Shu H., Hu H., Chen B., Wang Y., Zhou Z.

Acta Physiologiae Plantarum

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2009

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tom 31

|

nr 5

Cotton (Gossypium L.) fiber strength is linked with many complex physiological and biochemical processes in the stage of secondary fiber cell wall thickening. With the aim of further exploiting of the relationship between fiber strength and genotypic differences in physiological characteristics, the experiment was implemented in Nanjing, China (in the lower reach of Yangtze River Valley in China) at the stage of cotton fiber thickening stage in 2004–2005. The result showed that the higher strength fiber (genotype Kemian 1) always had higher activities of sucrose synthetase (SuSy) and β-1,3-glucan synthase, and more sucrose and callose existed and transformed for cellulose synthesis than these of the other genotypes during the fiber secondary wall thickening period These resulted in a longer and more gently cellulose accumulation and wider range and longer period of fiber strength enhancing. Interestingly, the opposite effects were observed in lower strength fiber of Dexiamian 1 and intermediary indices were found in NuCOTN 33B with middle strength fiber. Taken together, above results suggested the variations in the transformation of sucrose and callose contents, and the dynamics of sucrose synthase and β-1,3-glucan synthase activities, might be one of the physiological reasons causing the differences in the speed of cellulose accumulation and fiber strength formation. Additionally, other results showed: (1) the occurrence of callose content peak might be an important sign of the onset of the secondary wall thickening in the fiber cell; (2) the duration and the maximum growth rate of cellulose rapid accumulation contribute more to fiber strength development than other indices of cellulose rapid accumulation.

13

Characterization of a transcriptionally active Tc1-like transposon in the microsporidian Nosema bombycis

61%

Xu J., Luo J., Debrunner-Vossbrinck B., Zhang X., Liu H., Zhou Z.

Acta Parasitologica

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2010

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tom 55

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nr 1

8-15

The Tc1 transposable element has been found in a wide variety of organisms including vertebrates, insects and fungi but has not been previously reported in Microsporidia. In this study we characterize an intact DNA transposon (NbTc1) from the microsporidian Nosema bombycis. This transposable element encodes a 337 amino acid transposase sequence, which contains the D,D34E functional motif required for transposition. A Southern blot of N. bombycis DNA separated by pulsedesis shows that copies of the NbTc1 transposon are present on 10 of the 14 chromosomes of N. bombycis. Amino acid sequence variation among copies of the NbTc1 is low, suggesting a conserved function for this transposon within N. bombycis. Phylogenetic analysis indicates that NbTc1 is a new member of the Tc1 family lineage, quite distinct from all previously described Tc1 elements, including those from fungi, indicating that NbTc1 forms a unique clade of the Tc1 superfamily. However, the Tc1 transposon is too divergent to resolve the major phylogenetic relationships among these superfamilies. Reverse transcriptase PCR and Solexa sequencing suggest that NbTc1 possesses transcriptional activity. Considering the interest in Microsporidia as biological control agents, the NbTc1 transposon may be a useful vector for the efficient transfection of these important parasites into host species.

14

Physiological mechanism of programmed cell death aggravation and acceleration in wheat endosperm cells caused by waterlogging

61%

Yu M., Zhou Z., Deng X., Li J., Mei F., Qi Y.

Acta Physiologiae Plantarum

|

2017

|

tom 39

|

nr 01

15

Adsorption of Rhodamine B from aqueous solution by goat manure biochar: kinetics, isotherms, and thermodynamic studies

61%

Lu Y., Chen J., Zhao L., Zhou Z., Qiu C., Li Q.

Polish Journal of Environmental Studies

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2020

|

tom 29

|

nr 4

16

Effect of soil salinity, soil drought, and their combined action on the biochemical characteristics of cotton roots

61%

Zhang L., Chen, Zhang G., Li J., Wang Y., Meng Y., Zhou Z.

Acta Physiologiae Plantarum

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2013

|

tom 35

|

nr 11

Stress caused by soil salinity and soil drought limits cotton productivity in China. To determine the tolerance levels of cotton, we assessed the effects of soil salinity and soil drought on the biochemical characteristics of the roots of two cotton cultivars (CCRI-44, salt-tolerant; Sumian 12, salt-sensitive). Specifically, we analyzed root biomass, fatty acid composition, antioxidative enzyme activity, lipid peroxidation, H+-ATPase and Ca2+-ATPase activities. The cotton root biomass of the two cultivars declined significantly under conditions of soil salinity, soil drought, and the two stressors combined. The antioxidant enzyme activity of the roots also decreased markedly, which caused lipid peroxidation to increase, and changed the composition of the fatty acid membrane. H+-ATPase, Ca2+-ATPase and antioxidant enzyme activity decreased more under the two stressors combined. However, H2O2 content and O2 - generation increased under the two stressors combined, compared to each stressor separately. Overall, the combination of soil salinity and drought has a greater inhibitory effect and more harmful impact on root growth than each stressor separately. The higher tolerance of CCRI-44 to soil salinity and drought stress than Sumian 12 might be explained by differences in cotton root antioxidative enzyme activity. The lipid peroxidation levels of cotton roots might represent an important biochemical trait for stress tolerance.

17

An improved feature extraction method for rolling bearing fault diagnosis based on MEMD and PE

61%

Zhang H., Zhao L., Liu Q., Luo J., Wei Q., Zhou Z., Qu Y.

Polish Maritime Research

|

2018

|

tom 25

|

nr Special Issue S2

The health condition of rolling bearing can directly influence to the efficiency and lifecycle of rotating machinery, thus monitoring and diagnosing the faults of rolling bearing is of great importance. Unfortunately, vibration signals of rolling bearing are usually overwhelmed by external noise, so the fault frequencies of rolling bearing cannot be readily obtained. In this paper, an improved feature extraction method called IMFs_PE, which combines the multivariate empirical mode decomposition with the permutation entropy, is proposed to extract fault frequencies from the noisy bearing vibration signals. First, the raw bearing vibration signals are filtered by an optimal band-pass filter determined by SK to remove the irrelative noise which is not in the same frequency band of fault frequencies. Then the filtered signals are processed by the IMFs_PE to get rid of the relative noise which is in the same frequency band of fault frequencies. Finally, a frequency domain condition indicator FFR(Fault Frequency Ratio), which measures the magnitude of fault frequencies in frequency domain, is calculated to compare the effectiveness of the feature extraction methods. The feature extraction method proposed in this paper has advantages of removing both irrelative noise and relative noise over other feature extraction methods. The effectiveness of the proposed method is validated by simulated and experimental bearing signals. And the results are shown that the proposed method outperforms other state of the art algorithms with regards to fault feature extraction of rolling bearing

18

Comparative study of the leaf transcriptomes and ionoms of Juglans regia and its wild relative species Juglans cathayensis

61%

Zhou Z., Han M., Hou M., Deng X., Tian R., Min S., Zhang J.

Acta Physiologiae Plantarum

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2017

|

tom 39

|

nr 10

19

The effects of litter layer and soil properties on the soil-atmosphere fluxes of greenhouse gases in karst forest, Southwest China

61%

Cheng J., Lee X., Zhou Z., Wang B., Xing Y., Cheng H., Tang Y.

Polish Journal of Ecology

|

2013

|

tom 61

|

nr 1

Temporal variation is a major source of the uncertainty in estimating the fluxes of the greenhouse gases (GHGs) in terrestrial ecosystems, and the GHG fluxes and its affecting factors in the karst region of southwest China remains weakly understood. Using the static chamber technique and gas chromatography method, the CO₂, CH₄ and N₂O fluxes were carried out between 9 and 11 a.m. at 15 day intervals from June 2008 to May 2009 in a Pinus massoniana forest. Two treatments were chosen for this study: undisturbed (soil with litter layer) and disturbed (surface litter removal). Both treatments were found to be the net source of atmospheric CO₂ and N₂O, but a sink of atmospheric CH₄. The seasonality of soil CO₂ emission coincided with the seasonal climate pattern, with high CO₂ emission rates in the hot-wet season and low rates in the cool-dry season. In contrast, seasonal patterns of CH₄ and N₂O fluxes were not clear, although higher CH₄ uptake rates were often observed in autumn and higher N₂O emission rates were often observed in spring (dry-wet season transition). The litter was active in GHG fluxes, and removal of the litter layer reduced soil CO₂ emission (17%) and increased CH₄ uptake (24%) whereas N₂O fluxes were not affected distinctly in the pine forest, indicating that litter layer had an important effect on C exchanges. In the pine forest, soil CO₂ emissions and CH₄ uptakes correlated significantly with soil temperature (r²= 0.87, P <0.01; r²= 0.34, P <0.05, respectively), but had no significant relationship with soil moisture. And there was a significant correlation between CH₄ flux and NH₄⁺-N (r²= 0.39, P < 0.05) and soil inorganic N (r²= 0.48, P <0.05), but no significant correlation was found between CH₄ flux and NO₃⁻-N. Moreover, we found a significant negative logarithmic correlation between N₂O flux and soil NO₃⁻-N concentration (r²= 0.41, P <0.05), and the relationship between CO₂ emission and soil inorganic N content (r²= 0.35, P < 0.05). These results suggested that soil temperature and mineral N dynamics largely affected the temporal GHG exchanges between forest soil and atmosphere.

20

Concentrations of heavy metals in six municipal sludges from Guangzhou and their potential ecological risk assessment for agricultural land use

52%

Liu J., Zhou Z., Sun S., Ning X., Zhao S., Xie W., Wang Y., Zheng L., Huang R., Li B.

Polish Journal of Environmental Studies

|

2015

|

tom 24

|

nr 1

Six kinds of municipal sludge samples were collected from wastewater treatment plants (WWTPs) from Guangzhou in southern China. Total concentration of Cu, Pb, Zn, Cr, Ni, Cd, and Mn in the sludge was determined, and used obtained values to appraise the degree of agricultural land pollution on the base of four pollution indixes. Results showed that the concentrations of the heavy metals Cu (4.567 mg/kg), Mn (1.844 mg/kg), Ni (148 mg/kg), Cr (121 mg/kg), and Cd (5.99 mg/kg) in S1 sludge were higher than that of the other sludges. In six sludge samples the concentrations of Mn, Zn, and Cu were highest, followed by Ni, Pb, and Cr. Cd had the lowest concentration. All were higher than those recorded in the background data for crop soils. With the exception of Cu and Cd from site S1, and Ni from sites S1, S2, and S5, all other metal concentrations conformed to permissible levels prescribed by the national application standard of acid soil in China (GB18918-2002). The geoaccumulation index (Igeo) assessment results indicate that there are serious risks in agricultural utilization for the existing Cu and Zn in these six kinds of sludges, especially the Igeo, which was 6.53 for Cu, 3.21 for Mn, 2.78 for Cd in the S1 sludge. The results of RI showed that sludge had high potential ecological risks, especially caused by Cd, which should give rise to widespread concerns. The potential ecological risk index (RI) of heavy metals in six sludge samples was ranked in the order of S1>S2>S4>S3>S5>S6.

Ograniczanie wyników

Low to middle vibro-acoustic noise prediction in ship cabin by using plate-cavity coupling model

Effects of exogenously supplied sucrose on OsSUTs and OsSPSs transcript abundances and rice root ammonium assimilation

New bird remains from the Middle Eocene of Guangdong, China

Seedling growth, root development and nutrient use efficiency of Cypress clones in response to calcium fertilizer

Associations between polymorphism in the 2,4-dienoyl-CoA reductase 1 gene (DECR1) and growth traits of Shanxi White pig

Optimized design and analysis of offshore Beidou Maritime Foundation reinforcement system pseudolite ranging-codes

Associated growth of C3 and C4 desert plants helps the C3 species at the cost of the C4 species

A high-efficiency Agrobacterium tumefaciens mediated transformation system using cotyledonary node as explants in soybean (Glycine max L.)

Antimicrobial resistance and virulence factor gene profiles of Enterococcus spp. isolated from giant panda oral cavities

Effects of potassium deficiency on the enzymatic changes in developing cotton fibers

Provenance-specific climate sensitivity of Pinus massoniana – a multi-environmental trial in subtropical China

Genotypic differences in some physiological characteristics during cotton fiber thickening and its influence on fiber strength

Characterization of a transcriptionally active Tc1-like transposon in the microsporidian Nosema bombycis

Physiological mechanism of programmed cell death aggravation and acceleration in wheat endosperm cells caused by waterlogging

Adsorption of Rhodamine B from aqueous solution by goat manure biochar: kinetics, isotherms, and thermodynamic studies

Effect of soil salinity, soil drought, and their combined action on the biochemical characteristics of cotton roots

An improved feature extraction method for rolling bearing fault diagnosis based on MEMD and PE

Comparative study of the leaf transcriptomes and ionoms of Juglans regia and its wild relative species Juglans cathayensis

The effects of litter layer and soil properties on the soil-atmosphere fluxes of greenhouse gases in karst forest, Southwest China

Concentrations of heavy metals in six municipal sludges from Guangzhou and their potential ecological risk assessment for agricultural land use