PL
 |
EN
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 9

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote Effects of Sample Size, Sample Accuracy and Environmental Variables on Predictive Performance of MaxEnt Model
100%
Li Y. , Ding C.
|
|
tom Vol. 64, nr 3
303--312
EN
The availability of sample data, together with detailed environmental factors, has fueled a rapid increase in predictive modeling of species geographic distributions and environmental requirements. We founded that MaxEnt model has provided different descriptions of potential distributions based on different sample size, sample accuracy and environmental background. We used six combinations based on three sample data set and two kinds of environmental variables to estimate the potentially suitable areas of Brown Eared Pheasant (Crossoptilon mantchuricum) in MaxEnt model. The results show that the complex variables provided the higher AUC value and accurate potential distribution than simple variables based on the same size of samples. Complicated environmental factors combined with moderate size and accurate sample, can predict better results. The model results were scabrous based on simple environmental factors. Furthermore, big sample size and simple prediction environmental factors will reduce the prediction accuracy, whereas small samples provided a conservative description of ecological niche. Here, we highlighted that considering the big size and high accuracy of sample and many environmental factors of a species to minimize error when attempting to infer potential distributions from current data in MaxEnt model.
2
Content available Delay-dependent dissipative control for stochastic singular systems with state delay
100%
Ding C. , Li Q.
Archives of Control Sciences
|
2013
|
tom Vol. 23, no. 3
281--293
EN
The problem of delay-dependent dissipative analysis and control for stochastic singular systems with state delay is investigated in this paper. Delay-dependent dissipative condition for the stochastic singular systems with state delay is obtained by employing singular stochastic Lyapunov and LMI-based methods. Based on this condition, a delay-dependent dissipative controller is presented. A numerical example is provided to demonstrate the effectiveness of the proposed approach.
3
Content available remote On Some Problems of Mateescu Concerning Subword Occurrences
100%
Ding C. , Salomaa A.
|
2006
|
tom Vol. 73, nr 1-2
65-79
EN
The paper investigates inference based on quantities |w|u, the number of occurrences of a word u as a scattered subword of w. Parikh matrices recently introduced are useful tools for such investigations. We introduce and study universal languages for Parikh matrices. We also obtain results concerning the inference from numbers |w|u to w, as well as from certain entries of a Parikh matrix to other entries.
4
Content available remote Secret Sharing Schemes with Nice Access Structures
100%
Ding C. , Salomaa A.
|
2006
|
tom Vol. 73, nr 1-2
51-63
EN
Secret sharing schemes, introduced by Blakley and Shamir independently in 1979, have a number of applications in security systems. One approach to the construction of secret sharing schemes is based on coding theory. In principle, every linear code can be used to construct secret sharing schemes. But only well structured linear codes give secret sharing schemes with nice access structures in the sense that every pair of participants plays the same role in the secret sharing. In this paper, we construct a class of good linear codes, and use them to obtain a class of secret sharing schemes with nice access structures.
5
Regulation of autoreactive B cells: checkpoints and activation
100%
Ding C. , Yan Y.
Archivum Immunologiae et Therapiae Experimentalis
|
2007
|
tom 55
|
nr 2
6
Content available remote Construction and enumeration of all binary duadic codes of length p(m)*
80%
Ding C. , Lam K. Y. , Xing C.
|
|
tom Vol. 38, Nr 1,2
149-161
EN
In this paper we present a binary-tree approach to the construction of all binary duadic codes of length n = pm. We also calculate the number of binary duadic codes of length n = pm, where p =+1 mod 8 is a prime.
7
Content available remote Effects of Pinus massonian plantations on soil macroarthropods in degraded ultisol, Subtropical China
61%
Ding C. , Hu F. , Zhou J. , Cao Z. , Li H. , Dai Z.
Archives of Environmental Protection
|
2008
|
tom Vol. 34, no. 3
17-20
EN
In the degraded red soil of subtropical China, restoration activities during the last century have mainly relied on extensive plantations of Pinus massonian. We analyze the changes in the soil macroarthropods in P. massonian plantations and the possible relationships between these changes and soil chemical parameters. The study revealed significant differences in the abundance of soil macroarthropods between the P. massonian plantations and the natural regenerated mesophilous herbosa (Nl). The sharply differentiated pattern of soil macroarthropods seems closely linked to soil chemistry. Significant correlations of the abundance of soil macroarthropods with soil parameters suggest that their populations could have been affected by P massonian. The total abundance, the abundance of Hymenoptera and Termite were less in the P. massonian plantations when compared to the natural regenerated mesophilous herbosa (Nl). This survey showed that P.massonian could adversely affect the decomposer community which could lower the nutrient cycling rate, thus P.massonian may not be an ideal plantation for restoration of eroded Ultisol, Subtropical China.
8
NtGRAS-R1, a topping responsive transcription regulator in tobacco roots
61%
Xu F. , Xiao W. , Li J. , Ding C. , Li S. , Liu W. , Guo H.
|
|
tom 37
|
nr 09
EN
Topping, the critical cultural practice, is a kind of damage occurred tobacco shoot, which can obviously promote roots growth. Up to now, the mechanism regulating roots growth after topping is still unclear. In our previous works, miR171d was identified as a major topping responsive miRNA in tobacco roots, and its target gene was predicted to belong to the GRAS gene family. In the present study, NtGRAS-R1, a novel GRAS transcription regulator, was firstly cloned from tobacco roots. NtGRAS-R1 contained an open reading frame of 1527 bp encoding a 508-amino acids protein, and its molecular mass and isoelectric point was 56.199 KD and 5.24, respectively. GRAS proteins in tobacco can be grouped into nine subfamilies, including HAM, SCR, LAS, DLT, DELLA, SCL, LISCL, SHR and PAT1. NtGRAS-R1 is highly homologous with NtGRAS44 and belongs to HAM subfamily. The expression of NtGRAS-R1 can be detected in tobacco roots, leaves and stems, and its expression level was highest in tobacco roots. The analysis of transgenic tobacco showed that NtGRAS-R1 was involved in several biology processes, such as rooting, germination and root development, which will be helpful to explore the roles of NtGRAS-R1 in response to tobacco topping.
9
A blastocyst biopsy approach for preimplantation genetic diagnosis technique that affects the expression of SNAP-α in mice
51%
Zhang Y. , Fang Z. , Lu H. , Li Y. , Baloch Z. , Liu Y. , Yang S. , Lu Z. , Ding C.
|
|
tom 20
|
nr 3
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.