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Search Results: 1 - 10 of 13305 matches for " Qianhua Ling "
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Implications of Being a Highly Rated Organization: Evidence from Four-Star Rated Nonprofits
Qianhua Ling,Daniel Gordon Neely
Accounting and Finance Research , 2012, DOI: 10.5430/afr.v1n1p3
Abstract: This study examines a group of nonprofits rated four stars by Charity Navigator. The purpose is to determine whether this select group of charities exhibits characteristics associated with top charitable organizations, or whether the four-star rating achieved is limited to the more narrow financial metrics employed in the methodology utilized by Charity Navigator. This study finds that organizations rated four stars by Charity Navigator show a lower level of excess cash holdings, report a lower level of compensation expenses and exhibit lower sensitivity of compensation to performance. Financially, these organizations are less vulnerable than their lower rated peers. The results from this study shed light on the continuing debate of the effectiveness of rating agencies to accurately identify top performing charitable organizations.
An Audio Retrieval Algorithm Based on Audio Shot and Inverted Index
Xueyuan Zhang,Qianhua He
International Journal of Machine Learning and Computing , 2013, DOI: 10.7763/ijmlc.2013.v3.294
Abstract: An efficient audio indexing and retrieval algorithm is proposed to locate similar audio segments in the database. A new boundary detection technique based on audio shot is proposed for audio segmentation. Subsequently, a new method is employed to convert the audio shot sequence to audio word sequence, which utilizes a self-learning audio shot dictionary. We also borrow the idea of inverted file from text retrieval to locate candidates efficiently. Furthermore, a similarity measure combining content and temporal order matching is proposed. Experiment results show a retrieval precision of 94.70% within an average response time of 6.344 seconds.
The Use of Adaptive Frame for Speech Recognition
Qianhua He,Sam Kwong
EURASIP Journal on Advances in Signal Processing , 2001, DOI: 10.1155/s1687617201000208
Abstract: We propose an adaptive frame speech analysis scheme through dividing speech signal into stationary and dynamic region. Long frame analysis is used for stationary speech, and short frame analysis for dynamic speech. For computation convenience, the feature vector of short frame is designed to be identical to that of long frame. Two expressions are derived to represent the feature vector of short frames. Word recognition experiments on the TIMIT and NON-TIMIT with discrete Hidden Markov Model (HMM) and continuous density HMM showed that steady performance improvement could be achieved for open set testing. On the TIMIT database, adaptive frame length approach (AFL) reduces the error reduction rates from 4.47% to 11.21% and 4.54% to 9.58% for DHMM and CHMM, respectively. In the NON-TIMIT database, AFL also can reduce the error reduction rates from 1.91% to 11.55% and 2.63% to 9.5% for discrete hidden Markov model (DHMM) and continuous HMM (CHMM), respectively. These results proved the effectiveness of our proposed adaptive frame length feature extraction scheme especially for the open testing. In fact, this is a practical measurement for evaluating the performance of a speech recognition system.
Type I J-Domain NbMIP1 Proteins Are Required for Both Tobacco Mosaic Virus Infection and Plant Innate Immunity
Yumei Du equal contributor,Jinping Zhao equal contributor,Tianyuan Chen equal contributor,Qi Liu,Haili Zhang,Yan Wang,Yiguo Hong,Fangming Xiao,Ling Zhang,Qianhua Shen,Yule Liu
PLOS Pathogens , 2013, DOI: 10.1371/journal.ppat.1003659
Abstract: Tm-22 is a coiled coil-nucleotide binding-leucine rich repeat resistance protein that confers durable extreme resistance against Tomato mosaic virus (ToMV) and Tobacco mosaic virus (TMV) by recognizing the viral movement protein (MP). Here we report that the Nicotiana benthamiana J-domain MIP1 proteins (NbMIP1s) associate with tobamovirus MP, Tm-22 and SGT1. Silencing of NbMIP1s reduced TMV movement and compromised Tm-22-mediated resistance against TMV and ToMV. Furthermore, silencing of NbMIP1s reduced the steady-state protein levels of ToMV MP and Tm-22. Moreover, NbMIP1s are required for plant resistance induced by other R genes and the nonhost pathogen Pseudomonas syringae pv. tomato (Pst) DC3000. In addition, we found that SGT1 associates with Tm-22 and is required for Tm-22-mediated resistance against TMV. These results suggest that NbMIP1s function as co-chaperones during virus infection and plant immunity.
mRNA-seq Analysis of the Gossypium arboreum transcriptome Reveals Tissue Selective Signaling in Response to Water Stress during Seedling Stage
Xueyan Zhang, Dongxia Yao, Qianhua Wang, Wenying Xu, Qiang Wei, Chunchao Wang, Chuanliang Liu, Chaojun Zhang, Hong Yan, Yi Ling, Zhen Su, Fuguang Li
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0054762
Abstract: The cotton diploid species, Gossypium arboreum, shows important properties of stress tolerance and good genetic stability. In this study, through mRNA-seq, we de novo assembled the unigenes of multiple samples with 3h H2O, NaCl, or PEG treatments in leaf, stem and root tissues and successfully obtained 123,579 transcripts of G. arboreum, 89,128 of which were with hits through BLAST against known cotton ESTs and draft genome of G. raimondii. About 36,961 transcripts (including 1,958 possible transcription factor members) were identified with differential expression under water stresses. Principal component analysis of differential expression levels in multiple samples suggested tissue selective signalling responding to water stresses. Venn diagram analysis showed the specificity and intersection of transcripts’ response to NaCl and PEG treatments in different tissues. Self-organized mapping and hierarchical cluster analysis of the data also revealed strong tissue selectivity of transcripts under salt and osmotic stresses. In addition, the enriched gene ontology (GO) terms for the selected tissue groups were differed, including some unique enriched GO terms such as photosynthesis and tetrapyrrole binding only in leaf tissues, while the stem-specific genes showed unique GO terms related to plant-type cell wall biogenesis, and root-specific genes showed unique GO terms such as monooxygenase activity. Furthermore, there were multiple hormone cross-talks in response to osmotic and salt stress. In summary, our multidimensional mRNA sequencing revealed tissue selective signalling and hormone crosstalk in response to salt and osmotic stresses in G. arboreum. To our knowledge, this is the first such report of spatial resolution of transcriptome analysis in G. arboreum. Our study will potentially advance understanding of possible transcriptional networks associated with water stress in cotton and other crop species.
Determination of coptis chinensis’ quality by FT-NIR spectroscopy  [PDF]
Jidong Yang, Zhenyao Liu, Bing Liu, Qianhua Zhu
Health (Health) , 2012, DOI: 10.4236/health.2012.44029
Abstract: As a kind of traditional Chinese medicinal materials coptis chinensis has a lot of medicinal value and closely related to human health, Widely used in clinical or disease prevention and treatment. So the quality of medicinal coptis chinensis rapid determination is very important. Calibration model for determination of Coptis chinensis’ quality was built by partial least squares and near infrared spectroscopy, and the method of spectral pretreatment was discussed. Berberine and moisture content were used as evaluation index of Coptis chinensis’ quality according to traditional Chinese medicine standard in this experiment. The first derivative and vector normalization were adopted for the spectral preprocessing. The performance of the final model was evaluated according to root mean squares error of cross-validation (RMSECV), root mean square error of prediction (RMSEP) and correlation coefficient (R). According to the model of calibration set, the R values were 0.9298 and 0.8898, RMSECV were 0.239% and 0.302%. The R values of prediction set were 0.9347 and 0.9146, RMSEP were 0.104% and 0.330%, and prediction results were accurate and reliable. This method could be applied in rapid analysis of Coptis chinensis. The method was suitable for production fields and research fields, and had a wide application prospect.
A wind tunnel investigation on the transverse motion of aeolian sand

ZhenTing Wang,QianHua Zhang,ZhiBao Dong,

寒旱区科学 , 2011,
Abstract:
Experimental Study on the Uniaxial Cyclic Deformation of 25CDV4.11 Steel
Guozheng KANG,Qianhua KAN,Juan ZHANG,
Guozheng KANG
,Qianhua KAN and Juan ZHANG

材料科学技术学报 , 2005,
Abstract: The strain cyclic characteristics and ratcheting behavior of 25CDV4.11 steel were studied by the experiments under uniaxial cyclic loading with relatively high cyclic number and at room temperature. The cyclic hardening/softening feature of the material was first observed under the uniaxial strain cycling with various strain amplitudes. Then, the ratcheting behavior of the material was researched in detail, and the effects of stress amplitude and mean stress on the ratcheting were discussed under uniaxial asymmetrical stress cycling. Comparing with the experimental results of SS316L stainless steel, it is concluded that the material exhibits remarkable cyclic softening feature, and then a special ratcheting behavior is caused. Some conclusions useful to establish corresponding constitutive model are obtained.
Simple Sequence Repeat Molecular Marking Analysis of the Genetic Relationship between Zhaoqing Local Fine Citrus Breeds and Other Citrus and Allied Plants
Qianhua ji,Xiqin Zhou,Yanjun Guo,Liying Guo
Journal of Agricultural Science , 2012, DOI: 10.5539/jas.v4n11p102
Abstract: The genetic relationship between Zhaoqing local citrus breeds and other citrus and allied plants was studied using the simple sequence repeat (SSR) molecular marker technique. Among 34 pairs of citrus SSR primers, this study selected 13 primer pairs with high polymorphism to expand 83 bands with 100% polymorphism positive rate. Through cluster analysis, this study effectively differentiated the species, breeds, and even strains of citrus, poncitrus, and atalantia correa. Thus, SSR molecular marker techniques can adapt to the classification of the status research of local citrus germplasm resources. A close genetic relationship was found among Zhaoqing local citrus breeds. This study provided evidence that Citrus haniana Hort. ex Tseng Sihuihanggan is the female parent of C. nobilis Lour. gonggan by combining morphological and other molecular biology research.
Short-Term Delayed Recall of Auditory Verbal Learning Test Is Equivalent to Long-Term Delayed Recall for Identifying Amnestic Mild Cognitive Impairment
Qianhua Zhao, Yingru Lv, Yan Zhou, Zhen Hong, Qihao Guo
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051157
Abstract: Delayed recall of words in a verbal learning test is a sensitive measure for the diagnosis of amnestic mild cognitive impairment (aMCI) and early Alzheimer’s disease (AD). The relative validity of different retention intervals of delayed recall has not been well characterized. Using the Auditory Verbal Learning Test–Huashan version, we compared the differentiating value of short-term delayed recall (AVL-SR, that is, a 3- to 5-minute delay time) and long-term delayed recall (AVL-LR, that is, a 20-minute delay time) in distinguishing patients with aMCI (n = 897) and mild AD (n = 530) from the healthy elderly (n = 1215). In patients with aMCI, the correlation between AVL-SR and AVL-LR was very high (r = 0.94), and the difference between the two indicators was less than 0.5 points. There was no difference between AVL-SR and AVL-LR in the frequency of zero scores. In the receiver operating characteristic curves analysis, although the area under the curve (AUC) of AVL-SR and AVL-LR for diagnosing aMCI was significantly different, the cut-off scores of the two indicators were identical. In the subgroup of ages 80 to 89, the AUC of the two indicators showed no significant difference. Therefore, we concluded that AVL-SR could substitute for AVL-LR in identifying aMCI, especially for the oldest patients.
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