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Search Results: 1 - 10 of 42638 matches for " Qiliang Xu "
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Inquiry of Water-Soluble Polysaccharide Extraction Conditions from Grapefruit Skin  [PDF]
Shiyu Tan, Qiliang Xu, Ziping Luo, Zilin Liu, Haiyan Yang, Lingli Yang
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.311135
Abstract: Water-soluble polysaccharide was isolated from grapefruit with the method of water-dissolving and ethanol-precipitating. By single factor test and orthogonal experimental method, the extraction conditions of the water-soluble polysaccharide were investigated, which contained liquid-solid ratio, temperature, time and pH. The results showed that pH was the most important factor of polysaccharide extraction, followed by temperature. The optimized extraction technology conditions were obtained. The liquid-solid ratio was 1:40, temperature was 90?C, time was 2.0 h, and pH was 2. The highest extraction rate of crude polysaccharide was 8.30%.
THE UPPER BOUND ELEMENT TECHNIQUE OF SOLVING AXISYMMETRIC EXTRUSION FORCE

XU Qiliang,SHI Wenhua Xi'an Institute of Metallurgy,Construction Engineering,

金属学报 , 1985,
Abstract: The design of a mode of the spatially truncated rigid cone element to con-form with the metal flow was made by the application of the upper bound the-ory-upper bound element technique.The problem to estimate the upper bound ofaxisymmetric extrusion deformation force may be solved consequently.Solutioncalculated by this mode after trial done on practice is in agreement with the actu-al one and the precision of calculation of the extrusion force seems to be muchimproved.
Technological Progress, Spatial Competition and Industrial Location: Estimation and Predictions of Cement Industry in Northwest China  [PDF]
Fei Wang, Qiliang Mao
Modern Economy (ME) , 2016, DOI: 10.4236/me.2016.79100
Abstract: This study estimates a theoretical multi-region industrial location model by adopting real statistics to investigate the intuition of shaping spatial pattern of economic activities in a case of cement industry in Northwest China. Based on the estimation of key parameters, we simulate the impact of technological progress on variation of location. We find that, given trade cost, with technological progress, operating cost decreases, it is profitable for firms to expand sale range. In long term, technological progress would induce server spatial competition and promote further spatial concentration of industry. Original areas with larger market and fine industrial base are still main agglomerations, while original peripheral areas are further to a downward trend, and parts of original areas located next to hot pot areas have become peripheries. Our study on influence of technological progress on industrial location confirms the importance of investigation on intuition of spatial pattern of economic activities. Technological progress is essentially achievement of sustainable development. However, neglecting substantial spatial competition induced by technology improvement turns against spatial allocation of resources. Hence, optimal location of industries is one of important factors to ensure sustainable development.
A Melanesian α-thalassemia mutation suggests a novel mechanism for regulating gene expression
Qiliang Li
Genome Biology , 2006, DOI: 10.1186/gb-2006-7-10-238
Abstract: Approximately 0.1% of the human genome sequence is responsible for the variation among individuals, and the majority of these differences are single-nucleotide polymorphisms (SNPs). Although most SNPs are stable and have no deleterious effects, others are likely to contribute to individuality, disease susceptibility, and individual responses to therapeutic drugs. At present, such 'functional' SNPs have mostly been identified in diseases that are caused by defects in a single gene (monogenic diseases), although SNPs have also been linked to complex diseases such as hypertension, diabetes, heart disease, and cancer, as well as to responses to drugs. SNPs are important not only in medicine but also in basic molecular biology as they represent a natural library of variations that can be used to elucidate and validate mechanisms of gene expression in vivo.In this regard, a SNP in the gene for myostatin - a transcription factor inhibiting muscle development - has recently been shown to contribute to the muscular hypertrophy typical of the Texel breed of sheep [1]. A G→A transition in the 3' untranslated region of the gene for myostatin creates a target site for a microRNA, which results in translational inhibition of myostatin and consequent muscle growth. Another SNP has recently been shown by De Gobbi et al. [2] to be responsible for a severe form of α-thalassemia found in Melanesia. This SNP disrupts gene expression by another novel mechanism, creating an illegitimate promoter site between the globin enhancers and the adult α-globin gene cluster, which has the effect of downregulating expression of the cluster. The molecular mechanism underlying this downregulation is not yet established, but the new findings provide the basis for some interesting speculations.Diseases caused by defects in the structure and expression of the globin genes, and thus of hemoglobin, represent the most complete repertoires of monogenic defects known to date. In nearly all cases, the molecul
On a Multiple Hilbert's Inequality with Parameters
Qiliang Huang
Journal of Inequalities and Applications , 2010, DOI: 10.1155/2010/309319
Abstract:
On a Multiple Hilbert's Inequality with Parameters
Huang Qiliang
Journal of Inequalities and Applications , 2010,
Abstract: By introducing multiparameters and conjugate exponents and using Hadamard's inequality and the way of real analysis, we estimate the weight coefficients and give a multiple more accurate Hilbert's inequality, which is an extension of some published results. We also prove that the constant factor in the new inequality is the best possible and consider its equivalent form.
Genome-wide Scan of Archaic Hominin Introgressions in Eurasians Reveals Complex Admixture History
Ya Hu,Yi Wang,Qiliang Ding,Yungang He,Minxian Wang,Jiucun Wang,Shuhua Xu,Li Jin
Quantitative Biology , 2014,
Abstract: Introgressions from Neanderthals and Denisovans were detected in modern humans. Introgressions from other archaic hominins were also implicated, however, identification of which poses a great technical challenge. Here, we introduced an approach in identifying introgressions from all possible archaic hominins in Eurasian genomes, without referring to archaic hominin sequences. We focused on mutations emerged in archaic hominins after their divergence from modern humans (denoted as archaic-specific mutations), and identified introgressive segments which showed significant enrichment of archaic-specific mutations over the rest of the genome. Furthermore, boundaries of introgressions were identified using a dynamic programming approach to partition whole genome into segments which contained different levels of archaic-specific mutations. We found that detected introgressions shared more archaic-specific mutations with Altai Neanderthal than they shared with Denisovan, and 60.3% of archaic hominin introgressions were from Neanderthals. Furthermore, we detected more introgressions from two unknown archaic hominins whom diverged with modern humans approximately 859 and 3,464 thousand years ago. The latter unknown archaic hominin contributed to the genomes of the common ancestors of modern humans and Neanderthals. In total, archaic hominin introgressions comprised 2.4% of Eurasian genomes. Above results suggested a complex admixture history among hominins. The proposed approach could also facilitate admixture research across species.
A Multiple Hilbert-Type Integral Inequality with a Non-Homogeneous Kernel
Qiliang Huang and Bicheng Yang
Journal of Inequalities and Applications , 2013, DOI: 10.1186/1029-242X-2013-73
Abstract: By using the way of weight functions and technic of real analysis, a multiple Hilbert-type integral inequality with a non-homogeneous kernel is given. The operator expression with the norm, the reverses and some examples with the particular kernels are also considered.
On a Multiple Hilbert-Type Integral Operator and Applications
Qiliang Huang,Bicheng Yang
Journal of Inequalities and Applications , 2009, DOI: 10.1155/2009/192197
Abstract: By using the way of weight functions and the technic of real analysis, a multiple Hilbert-type integral operator with the homogeneous kernel of λ-degree (λ∈R) and its norm are considered. As for applications, two equivalent inequalities with the best constant factors, the reverses, and some particular norms are obtained.
On a Multiple Hilbert-Type Integral Operator and Applications
Huang Qiliang,Yang Bicheng
Journal of Inequalities and Applications , 2009,
Abstract: By using the way of weight functions and the technic of real analysis, a multiple Hilbert-type integral operator with the homogeneous kernel of -degree ( ) and its norm are considered. As for applications, two equivalent inequalities with the best constant factors, the reverses, and some particular norms are obtained.
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