http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Liyan Zhang (검색결과 28 건)
- 무료
- 기관 내 무료
- 유료
-
Zhang Liyan 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.1
Based on the needs of the Regional Scientific and Technological Innovation Platform, innovations evaluation system was established by AHP. In order to simulate the experts’ experiences and thinking, we used the improved BP neural network model. After training by putting in actual data, the improved BP neural network model was put in use to evaluate and manage the innovations created by the Regional Scientific and Technological Innovation Platform.
-
Effects of Cooking on Thermal-induced Changes of Qingyuan Partridge Chicken Breast
Liyan Zhang,Shiyu Wang 한국식품과학회 2012 Food Science and Biotechnology Vol.21 No.6
Changes in some properties of cooked 22-weekold Qingyuan Partridge chicken breast were investigated. Cooking losses of meat increased significantly in the range 55-85oC (p<0.05). The heated chicken muscle became lighter and yellower. The shear value of meat decreased markedly to a minimum at 65oC, and increased dramatically upon cooking from 65 to 85oC (p<0.05) with a slight increase from 85 to 100oC (p>0.05). The texture profile analysis parameters of meat changed independently with increasing temperature. Muscle fibers decreased to a minimum (p<0.05) at 65oC with an increase from 65 to 75oC. A significant decrease in solubility of salt-soluble myofibrillar proteins (p<0.05) and an increase in the content of heat-soluble collagen in the range 55-65oC were observed. The results demonstrated that cooking temperature had significant effects on the thermal-induced changes of older chicken and marked changes were happened from 55 to 85oC.
-
-
Wang Liyan,Tian Da,Zhang Xiaoru,Han Mingxue,Cheng Xiaohui,Ye Xinxin,Zhang Chaochun,Gao Hongjian,Li Zhen 한국미생물학회 2023 The journal of microbiology Vol.61 No.8
Phosphate-solubilizing fungi (PSF) efficiently dissolve insoluble phosphates through the production of organic acids. This study investigates the mechanisms of organic acid secretion by PSF, specifically Penicillium chrysogenum, under tricalcium phosphate ( Ca3(PO4)2, Ca–P) and ferric phosphate ( FePO4, Fe–P) conditions. Penicillium chrysogenum exhibited higher phosphorus (P) release efficiency from Ca-P (693.6 mg/L) than from Fe–P (162.6 mg/L). However, Fe–P significantly enhanced oxalic acid (1193.7 mg/L) and citric acid (227.7 mg/L) production by Penicillium chrysogenum compared with Ca–P (905.7 and 3.5 mg/L, respectively). The presence of Fe–P upregulated the expression of genes and activity of enzymes related to the tricarboxylic acid cycle, including pyruvate dehydrogenase and citrate synthase. Additionally, Fe–P upregulated the expression of chitinase and endoglucanase genes, inducing a transformation of Penicillium chrysogenum mycelial morphology from pellet to filamentous. The filamentous morphology exhibited higher efficiency in oxalic acid secretion and P release from Fe–P and Ca–P. Compared with pellet morphology, filamentous morphology enhanced P release capacity by > 40% and > 18% in Ca–P and Fe–P, respectively. This study explored the strategies employed by PSF to improve the dissolution of different insoluble phosphates.
-
The Effect of Dipping Pretreatment on Ochratoxin A Accumulation in Sultanas and Currants
Xiaoxu Zhang,Jingming Li,Dong Wang,Saisai Feng,Liyan Ma 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.3
The dipping pretreatment on the occurrence of ochratoxin A (OTA) in sultanas and currants was investigated. Grape samples were divided into two groups before a drying process. One group was dipped with potassium carbonate-ethyl oleate, and the other group was left without treatment (the control). OTA were detected using solid-phase extraction clean-up and a high-performance liquid chromatography fluorescence detector. Results showed that OTA content was below the limit of detection in the fresh grapes of both varieties. OTA were not detected in dried vine fruits before storage. However, a real naturally environmental storage revealed that the dipping pretreated samples were contaminated with OTA earlier and to a greater extent than the control. The OTA concentration in the treated and control samples after one-year storage was 0.22 and 0.19 μg/kg for sultanas and 0.34 and 0.21 μg/kg for currants, respectively. These results indicated that dipping pretreatment might increase the toxin contamination and safety risk.
-
-
Xiangshi Zhen,Liyan Zhang,Meinong Shi,Li Li,Lisheng Cheng,Zhiwei Jiao,Weimin Yang,Yumei Ding 한국고분자학회 2020 Macromolecular Research Vol.28 No.3
Poly(methyl methacrylate) (PMMA)/nano-silica (nano-SiO2) nanocomposite film with 256 layers containing different amounts of nano-SiO2 was manufactured by a new type of micro-nano multilayer co-extrusion technology. The structure, morphology and mechanical properties of PMMA/nano-SiO2 nanocomposite films were investigated through Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and tensile test. Besides, molecular dynamics simulation was adopted to study the dispersion and content effect on mechanical properties of PMMA/nano-SiO2 nanocomposite film. It is demonstrated that the tensile strength and the elongation at break of the composites improved with increasing nano-SiO2 content from 0 to 5 wt%, which was in good agreement with the Molecular Dynamics simulation. And the nanofiller dispersion in the multilayer nanocomposite film was better than that in the single-layer film with equivalent thickness under the effect of torsion lamination. Overall, the best performance was found for the nanocomposites of PMMA with nano-SiO2 content of 3.5 wt%.
-
A Fast and Differentiated Localization Method for Complex Surfaces Inspection
Tan Gaoshan,Zhang Liyan,Liu Shenglan,Zhang Weizhong 한국정밀공학회 2015 International Journal of Precision Engineering and Vol. No.
Although significant progress has been made in free-form surface inspection, it remains a difficult problem in some tough situations. For a complex part with multiple freeform surfaces, different quality requirements are often assigned to different surface regions to guarantee the part functionality and/or assembly relations. In this case, the existing localization methods, which treat each individual surface without discrimination, are prone to over rejection of some qualified parts. In this paper, a new localization method is proposed to tackle this problem. It features in that a novel dynamic weighting strategy is introduced in the iterative optimization process to make the localization in favor of the surfaces with higher quality requirements. This strategy can avoid improper scrap of parts in inspection and proves to be more reasonable for the quality evaluation of complex parts. In addition, a distinct fast algorithm is proposed to solve the localization optimization problem. It needs only to solve a 4-order linear system to determine the rigid transformation in each iteration. This solving algorithm is much faster than the popular quaternion-based algorithm for the weighted optimization model. Experiments on a simulated example and a real integral impeller are included to verify the validity and practicability of the proposed algorithm.
-
KNN-based Image Annotation by Collectively Mining Visual and Semantic Similarities
( Qian Ji ),( Liyan Zhang ),( Zechao Li ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.9
The aim of image annotation is to determine labels that can accurately describe the semantic information of images. Many approaches have been proposed to automate the image annotation task while achieving good performance. However, in most cases, the semantic similarities of images are ignored. Towards this end, we propose a novel Visual-Semantic Nearest Neighbor (VS-KNN) method by collectively exploring visual and semantic similarities for image annotation. First, for each label, visual nearest neighbors of a given test image are constructed from training images associated with this label. Second, each neighboring subset is determined by mining the semantic similarity and the visual similarity. Finally, the relevance between the images and labels is determined based on maximum a posteriori estimation. Extensive experiments were conducted using three widely used image datasets. The experimental results show the effectiveness of the proposed method in comparison with state-of-the-arts methods.
-
Defu Wang,Liyan Cui,Li Zhang,Zhennan Ma,Yanbing Niu 한국식물병리학회 2021 Plant Pathology Journal Vol.37 No.2
Soybean mosaic virus (SMV) is the predominant viral pathogen that affects the yield and quality of soy- bean. The natural host range for SMV is very narrow, and generally limited to Leguminosae. However, we found that SMV can naturally infect Pinellia ternata and Atractylodes macrocephala. In order to clarify the molecular mechanisms underlying the cross- family infection of SMV, we used double-stranded RNA extraction, rapid amplification of cDNA ends polymerase chain reaction and Gibson assembly tech- niques to carry out SMV full-length genome amplifi- cation from susceptible soybeans and constructed an infectious cDNA clone for SMV. The genome of the SMV Shanxi isolate (SMV-SX) consists of 9,587 nt and encodes a polyprotein consisting of 3,067 aa. SMV-SX and SMV-XFQ008 had the highest nucleotide and ami- no acid sequence identities of 97.03% and 98.50%, re- spectively. A phylogenetic tree indicated that SMV-SX and SMV-XFQ018 were clustered together, sharing the closest relationship. We then constructed a pSMV-SX infectious cDNA clone by Gibson assembly technology and used this clone to inoculate soybean and Ailanthus altissima; the symptoms of these hosts were similar to those caused by the virus isolated from natural infected plant tissue. This method of construction not only makes up for the time-consuming and laborious defect of traditional methods used to construct infec- tious cDNA clones, but also avoids the toxicity of the Potyvirus special sequence to Escherichia coli, thus providing a useful cloning strategy for the construction of infectious cDNA clones for other viruses and laying down a foundation for the further investigation of SMV cross-family infection mechanisms.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
