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Search Results: 1 - 10 of 120207 matches for " Xueyan Wang "
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A Study on the Control Technique of Construction Project Process  [PDF]
Changming Hu, Shaoping Zhang, Xueyan Wang
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.53041
Abstract:
The construction process control of large-scale projects is one of the difficulties and keys in the owner’s project management. Based on generalization process index, this paper proposes an approach to construction project process control. The paper elaborates on the concept and calculation of generalization process index, which, on analysis, possesses Markov property. Monthly generalization process index is regarded as a state of Markov chain, and the transition between different states is realized by computer simulation. According to the Markov process forecasting model and by means of MATLAB program, the project process forecast is realized, and the completion probability in contract period is obtained. From practical instances, it is concluded that this approach has good applicability and operability and that the obtained results can reflect the degree of project risks.
Application of Criterion-Meeting Assessment Method in Fundamentals of Nursing  [PDF]
Xueyan Chen, Jihong Wang, Wenjuan Li
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B068
Abstract:

To investigate the results of criterion-meeting assessment method used for the operation test in fundamentals of nursing, 101 nursing undergraduates who entered Nursing College, Beihua University in 2007, were randomly divided into experimental group and control group. The students in the control group were examined with the traditional assessment method, namely, the points were given the students one-time and estimated in a way of quantitative analysis. The students in the experimental group were examined with criterion-meeting assessment methods. The average score of students in the experimental group was higher than that in the control group (P <0.001), the difference was statistically significant, and 100% students in the experimental group got 90-100 points of the assessment standards. Our studies suggest that the method is not only conducive to fully mobilizing the enthusiasm of the students and students’ establishing critical thinking, but also gives help to improve the overall quality of teachers. It can strengthen the experimental teaching, improve teachers’ and students’ senses of responsibility in teaching and learning and contribute to the good teaching result.

Research on the Contents and Structure of Social Support for Private Entrepreneurs
Xueyan Wei,Chongming Wang
Asian Social Science , 2009, DOI: 10.5539/ass.v5n2p11
Abstract: Firstly, this paper holds a semi-structural interview to 19 private entrepreneurs in different industries from different areas. Secondly, this paper analyzes the contents of the interview records and designs a questionnaire to survey the social support for private entrepreneurs based on literatures and interviews. Finally, this paper makes statistical analysis of 143 forecasting data and 289 effective measurement data. The research reveals the four-factor structural mode of social support. Here, the four factors are emotion support, information support, instrument support, and feedback support.
Choice for host-specific high-adhesive Lactobacillus strains  [PDF]
Xueyan Lin, Zhonghua Wang, Zhongxiang Niu, Hongjie Liu, Yun Wang
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.32022
Abstract: Adhesive ability was tested in seven Lactobacillus solated from the chicken digestive tract after cultivation with CaCo-2 cells (intestinal epithelial cells), MDCK (dog kidney) cells and CEF (chicken embryo fiber) cells. We noted the following important observations regarding the adhesive ability between different Lactobacillus strains and three cell types: the adhesive interaction between the SDnB7, SDnE1 and SDnA3 lactobacillus strains and CaCo-2cells was greater compared to controls, the adhesive effect between SDnB1 and CEF cells was also greater than controls and Lactobacillus showed only minimal adherence to MDCK cells. Incubation time also affected Lactobacillus adherence to CaCo-2cells: adhesive ability was optimal at 37°C when incubated for 2 days and this was confirmed by a local increase in the concentration of Lactobacillus around CaCo-2 cells when incubated for 24 h as opposed to 3 h. Adherence ability in lactobacillus was also tested at various concentrations (108, 107, 106, 105 and 104 ). The number of Lactobacillus that adhered around the cells was significantly increased in the treatment with 108 bacterial cells. Transmission electron microscopy revealed that the cellularity of the junction between CaCo-2cells and Lactobacillus was not compromised. Transmission electron microscopy also revealed that the thalli fabric structure remained intact.
The nature of adhesion factors which lie on the surfaces of Lactobacillus adhering to cells  [PDF]
Xueyan Lin, Zhonghua Wang, Zhongxiang Niu, Jun Peng, Yun Wang
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.32023
Abstract: Lactobacillus adheres to intestinal epithelial cells and yeast fungus cells with the aid of adhesion factors expressed on its cell surface. To identify adhesion factors nature on the surface of Lactobacillus, an adhesion experiment was carried out by pre-treating the Lactobacillus supernatant with different concentrations of bovine serum albumin, trypsin and 100°C for 10min. Additionally, intestinal epithelial cells were treated with sodium iodate, trypsin and sugar inhibition tests to characterize the receptors in Lactobacillus that interact with intestinal epithelial cells. It was demonstrated that Lactobacillus adhesion ability was decreased (P < 0.01) after treating the supernatant with different concentrations of bovine serum albumin, trypsin and 100°C for 10 min respectively. The adhesion factor on the surface of Lactobacillus cells was identified as a D-mannose glycoprotein. This observation was confirmed after treating intestinal epithelial cells with sodium iodate and trypsin, and sugar inhibition tests. Wild type Lactobacillus can agglutinate yeast fungus cells but after being exposured to mannose, agglutination to yeast fungus cells is lost or reduced. Results from this study we also got that inactivated and live bacteria that similarly adhere to intestinal epithelial cells.
Study on the Wireless Heat Meters  [PDF]
Rujian Ma, Xueyan Yang, Xiao Wang, Enping Zhang
Wireless Sensor Network (WSN) , 2010, DOI: 10.4236/wsn.2010.23034
Abstract: The design of a new type heat meters based on RFID technology are presented in this paper. By use of RFID technology in heat meters, the data can be exchanged between heat meters and heat supplying department by RF cards. The information can be transmitted in a non-contact way. In this way, the purpose of automatic identification can be achieved. The experimental study of the heat meters is also performed in the paper. The results show that the new type of heat meters can meet the demands of users. Compared with the ordinary heat meters, the new type of heat meters have the advantages of small in meter volume, high accuracy, no impact of water quality and good reliability.
Preparation of a polyclonal antibody against immunogenic fragment of bovine intestinal peptide transporter I (bPepTI)  [PDF]
Xiuxin Zhao, Xueyan Lin, Guimei Liu, Zhonghua Wang
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.32020
Abstract: The goal of the current study is to prepare polyclonal antibody against bovine intestinal peptide transporter I (bPepTI) in order to develop assay for immunological assessment of protein levels. Antigenicity of the entire bPepTI was analyzed with DNAStar, and a fragment with high antigenicity (bPepTI ORF 1369 - 1695) was selected, cloned in pGEX-6p-1 vector, resulting in a recombinant plasmid GST-BP, which verified by double enzyme digestion and sequenced, the recombinant plasmid was introduced to BL21. Exogenous expression was induced by IPTG and validated by Western blot analysis. The recombinant protein was isolated, purified and used for production of antiserum in mice. The specificity of antiserum was evaluated with immunobloting and titer was estimated with ELISA. Results indicate that the antibody against bPepTI was produced. The optimal GST-BP antigen embedding concentration was 0.5 μg/ml. The optimal dilution was 1:400. An indirect ELISA assay indicates the effective dilution was 1:102400.
Verification of Mongolian Cyclone-Induced Snowstorm Model Forecast in Jilin Province, China  [PDF]
Dongxue Fu, Xueyan Yang, Ning Wang, Yao Yao
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.58003
Abstract: Situation field forecast and rainfall forecast in typical numerical forecast models including EC (The European Centre for Medium-Range Weather Forecasts), t639 (T639 Global Forecast System) and Japanese model were verified by set statistics and TS (Threat Score) scoring based on 8 cases of Mongolian cyclone-induced snowstorm in Jilin Province in this paper. As shown by the results, for the forecast of Mongolian cyclone location and intensity, EC has significantly higher accuracy than Japanese model and t639, and there is a high likelihood that it forecasts the southerly cyclone location, relatively fast movement and comparatively weak intensity within 72 hours; for snowfall forecast, Japanese model shows significantly higher accuracy than other models, especially it has obviously stronger ability to forecast the heavy rainfall above snowstorm than other models, while WRF model (The Weather Research and Forecasting Model) has strong forecast ability of normal snowfall; for normal snowfall, the 72-hour missing forecast rate is higher than false forecast rate in all the models.
Evaluation of Feeding Dairy Cow with Whole Wheat Hay and Alfalfa  [PDF]
Tian Zhang, Deqing Zhang, Jinxin Wang, Qiuling Hou, Yun Wang, Zhiyong Hu, Xueyan Lin, Zhonghua Wang
Advances in Bioscience and Biotechnology (ABB) , 2018, DOI: 10.4236/abb.2018.99029
Abstract: The preliminary results of this laboratory (unpublished) indicate that the nutritional value of whole wheat hay (wheat hay, for short) is very high, and the milk stage is the best period of wheat hay harvest. In this study, we investigated the feeding effect and economic benefits using wheat hay instead of alfalfa diet for dairy cows under the condition of the same energy and crude protein levels. Three types of diets were used: alfalfa diet, wheat hay diet and alfalfa + wheat hay diet. The results showed that the dry matter digestibility of alfalfa diet and alfalfa + wheat hay diet did not differ significantly (P > 0.1), but was significantly higher than that of wheat hay diet (P < 0.05). The wheat hay diet could produce more propionic acid and ammonia nitrogen (P < 0.05) in the rumen, and reduce the ratio of acetic/propionic and nitrogen utilization. There was no significant difference in milk production among the three diets (P > 0.1). There was no significant difference in milk somatic cell count and body condition score among the three groups (P > 0.1). The wheat hay diet could significantly increase milk protein and lactose (P < 0.01). The contents of interleukin-6 in cows fed alfalfa diet and alfalfa + wheat diet were significantly higher than that in cows fed wheat hay diet (P < 0.05). There was no significant difference in interleukinm-6 between in cows fed alfalfa diet and alfalfa + wheat diet (P > 0.05). The use of wheat hay to replace imported alfalfa in whole or in part could save feed costs. Full substitution of alfalfa with wheat hay could have a daily economic benefit of 13.74 yuan.
The Effects of Amino Acid Nutritional Deficiency on the Expression of Protein Metabolism-Related Genes in the Mammary Gland and Muscle Tissues of Lactating Mice  [PDF]
Xueyan Lin, Miaomiao Wu, Guimei Liu, Yun Wang, Qiuling Hou, Kerong Shi, Zhonghua Wang
Advances in Bioscience and Biotechnology (ABB) , 2015, DOI: 10.4236/abb.2015.69063
Abstract: The mammary gland tissue exhibits a series of responses that are different from those of muscle and other peripheral tissues under amino acid deficiency. So, this present study was designed to investigate the effects of amino acid nutritional deficiency on the expression of protein metabolism-related genes in the mammary gland and muscle tissues of lactating mice. A total of 60 postpartum, lactating Kunming white mice were selected and randomly divided into 5 groups; each group contained 12 mice. Group A was the control group. The mice in group A were maintained on a normal diet after the initiation of lactation. Group B (starved) was given normal saline via intragastric administration. Group C (energy) was given glucose solution via intragastric administration. Groups D and E received a sodium caseinate solution via intragastric administration, which provided 0.5 g protein/d and 1.5 g protein/d, respectively. The results showed the following. 1) When the mice were exposed to nutritional stress caused by dietary amino acid deficiency, the β-casein mRNA expression level was increased in the mammary gland tissue. The increase in β-casein expression was the most significant in the energy-supplemented group, followed by the starved group (P < 0.01). In addition, the expression level of myosin heavy chain 2A (MHC2a) mRNA was markedly reduced in the muscle tissue (P < 0.05). 2) Different dietary treatments significantly affected the mRNA expression of ubiquitin system enzymes such as PolyUbC, E214k and C2 (P < 0.01). The expression levels of the enzymes were upregulated. 3) The blood level of insulin-like growth factor 1 (IGF-1) was significantly decreased in the treatment groups (P < 0.01). 4) The phosphorylation level of the p70S6 kinase (p70S6K) was markedly enhanced in the mammary gland tissues collected from the treatment groups (P < 0.05). 5) The phosphorylation level of p70S6K was elevated in the muscle tissues collected from the treatment groups. However, the magnitude of the increase was far smaller compared to that in the mammary gland tissues.
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