oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 24 )

2018 ( 262 )

2017 ( 338 )

2016 ( 275 )

Custom range...

Search Results: 1 - 10 of 18251 matches for " Jianzhang Fang "
All listed articles are free for downloading (OA Articles)
Page 1 /18251
Display every page Item
Low-Temperature Reverse Microemulsion Synthesis, Characterization, and Photocatalytic Performance of Nanocrystalline Titanium Dioxide
Zhang Liu,Zicong Jian,Jianzhang Fang,Xiaoxin Xu,Ximiao Zhu,Shuxing Wu
International Journal of Photoenergy , 2012, DOI: 10.1155/2012/702503
Abstract: Nanocrystalline titanium dioxide (TiO2) was synthesized in microemulsions by using cetyltrimethylammonium bromide (CTAB) as surfactant. In order to investigate the crystal transformation and photoactivity at low temperature, the as-prepared precipitates were aged at 65°C or calcined at various temperatures. Analyses using powder X-ray diffraction (XRD) and Fourier transform infrared microscopy (FT-IR) showed that precursors without aging or calcination were noncrystal and adsorbed by surfactant. After aging for 6 h, the amorphous TiO2 began to change into anatase. The obtained catalysts, which were synthesized in microemulsions with weight ratios of n-hexanol/CTAB/water as 6 : 3 : 1 and calcined at 500°C, presented the highest photocatalytic degradation rate on methyl orange (MO), while the catalysts, which were aged at 65°C for 90 h, also exhibited an outstanding photocatalytic performance and a little higher than that of the commercial titania photocatalyst Degussa P25.
Influence of uron resins on the performance of UF resins as adhesives for plywood
Gao,Wei; Li,Jianzhang;
Maderas. Ciencia y tecnología , 2012, DOI: 10.4067/S0718-221X2012000100001
Abstract: uron resin, a kind of urea-formaldehyde (uf) resin containing much more uron structure, were prepared. several modified uf resins were obtained from mixing uron resins with normal uf resins as well as synthesizing uf resin with uron resin as raw material. this work demonstrated that the introducing of the uron structure reduced free formaldehyde content of uf resin and formaldehyde emission levels in bonded plywood panels significantly, the former were reduced by 76% and 84% in the latter. the synthesis time of uron resin can be shortened to 8 hours. the test result of free formaldehyde content, formaldehyde emission levels and bond strength indicated that specimen of 20 parts uron resin synthesized in 8 hours mixed with 100 parts uf resins (f/u molar ratio of 1.3) had a potential advantage to industrial application. the beneficial effect of uron resin on the performance of uf resin can be attributed to the opening of uron cycle structure and the following reaction with free formaldehyde and its oligomeric glycol forms.
Influence of uron resins on the performance of UF resins as adhesives for plywood
Wei Gao,Jianzhang Li
MADERAS : Ciencia y Tecnología , 2012,
Abstract: Uron resin, a kind of urea-formaldehyde (UF) resin containing much more uron structure, were prepared. Several modified UF resins were obtained from mixing uron resins with normal UF resins as well as synthesizing UF resin with uron resin as raw material. This work demonstrated that the introducing of the uron structure reduced free formaldehyde content of UF resin and formaldehyde emission levels in bonded plywood panels significantly, the former were reduced by 76% and 84% in the latter. The synthesis time of uron resin can be shortened to 8 hours. The test result of free formaldehyde content, formaldehyde emission levels and bond strength indicated that specimen of 20 parts uron resin synthesized in 8 hours mixed with 100 parts UF resins (F/U molar ratio of 1.3) had a potential advantage to industrial application. The beneficial effect of uron resin on the performance of UF resin can be attributed to the opening of uron cycle structure and the following reaction with free formaldehyde and its oligomeric glycol forms.
SEASONAL NUTRITIONAL QUALITY OF RED DEER AND ROE DEER FORAGES IN SOUTHERN XIAO XINGAN MOUNTAINS,CHINA
马鹿和狍饲料植物的营养质量

Ma Jianzhang,
马建章

生态学报 , 1996,
Abstract: In this study, the contents of 8 nutrients(CP,NDF,ADF,IVDDM,Ca,P,Na,K)were measured for the twigs and leaves of 14 browse species, sedges,forbs,ferns and the bark of Ulmus spp.,collected in the southern Xiao Xingan Mountains,northeastern China,from 1991 to 1992.The results show that there was a significant difference in the content of those 8 nutrients for each forage item(P<0.05).The seasonal content of crude protein was highest and lowest in the leaves and the twigs of browses,respectively.The seasonal content of neutral and acid detergent fiber(NDF and ADF)reached highest in the browse twigs, and decreased to the lowest level in forbs.The seasonal content of calcium was highest in the browse twigs and forbs,and lowest in the sedges.For the potassium,it was highest in the forbs and ferns,and lowest in the browse twigs.The seasonal content of phophorus and sodium changed greatly,and showed no consistant patterns in each forage item.The content of crude protein showed alittle seasonal variation in the browse twigs,but it decreased continuously in the browse leaves,sedges,forbs and ferns,from spring to autumn.Each forage item had lower content of NDF and ADF in spring than in other seasons.There was a decreasing trend in the content of potassium while different seasonal pattern of change existed in the content of calcium, potassium and sodium for each forage item from spring to winter.The in vitro digestible dry matter was positively and negatively related to the content of crude protein and ADF,respectively.
Tribological behaviors of some polymeric materials in sea water
JianZhang Wang,FengYuan Yan,QunJi Xue
Chinese Science Bulletin , 2009, DOI: 10.1007/s11434-009-0578-4
Abstract: Ocean tribology, a new research field of tribology, is being established and developing. The investigation on the tribology in sea water has important significance to ocean exploitation. In this paper, the tribological behaviors of UHMWPE, PTFE as well as Ekonol/PTFE, graphite/PTFE and CF/PTFE sliding against GCr15 steel and Ni-Cr-WC alloy in sea water were investigated, and compared with those in pure water. Results show that the main factors that affect the tribological behaviors of five polymeric materials in sea water are the corrosive effect and lubricating effect of sea water. When polymeric materials sliding against GCr15 in sea water, owing to serious corrosion of counterface by sea water, the surface roughness of the counterface increases largely. As a result, the lubricating effect of medium decreases sharply and the plowing effect of counterface increases greatly. So the friction coefficients and wear rates of five materials sliding against GCr15 in sea water are much larger than those under other conditions. Such wear model, depending on the corrosion of counterface by medium, can be called indirect corrosive wear. Under other three conditions, owing to the more superior lubricating effect of sea water than pure water and the better wettability of Ni-Cr-WC than GCr15, the friction coefficients and wear rates of five materials increase in the following order: sliding against Ni-Cr-WC in sea water < sliding against Ni-Cr-WC in pure water < sliding against GCr15 in pure water. Moreover, compared with other materials, CF/PTFE is the one with more superior plowing and wear resistance in pure and sea water, which is a potential frictional material well suitable for pure and sea water lubrication.
Merocel versus Nasopore for Nasal Packing: A Meta-Analysis of Randomized Controlled Trials
Jianzhang Wang, Changping Cai, Shili Wang
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0093959
Abstract: Objective To compare the clinical outcomes, including efficacy and complications, of Merocel versus Nasopore as a nasal packing material after nasal surgery. Methods Relevant randomized controlled trials were identified from electronic databases (The Cochrane Library, PubMed, EMBASE, China National Knowledge Infrastructure and Chinese Biomedical Database). Conference proceedings and references from identified trials and review articles were also searched. Outcome measures were pain during nasal packing, pain and bleeding upon packing removal, pressure sensation, nasal blockage, formation of synechiae, mucosal healing, and patients' general satisfaction. Results Seven randomized controlled trials met criteria for analysis. Compared with Merocel, Nasopore significantly reduced patients' subjective symptoms including in situ pain (pain experienced while packing is in place), nasal pressure, pain and bleeding during packing removal, and increased patients' general satisfaction with nasal packing. There were no significant differences in nasal obstruction, adhesion and mucosal healing between the Merocel and Nasopore groups. Conclusions Preliminary evidence suggests that Nasopore may be superior to Merocel as a nasal packing material with regard to in situ pain, pain and bleeding upon removal, pressure, and general satisfaction and does not differ from Merocel in terms of nasal obstruction, tissue adhesion, and long-term mucosal healing.
A Study on the Risk of Small and Medium Enterprises Financial Outsourcing in China  [PDF]
Fang Fang
Open Journal of Social Sciences (JSS) , 2016, DOI: 10.4236/jss.2016.410001
Abstract: The domestic enterprises began to face fiercer competition, which under the rapid development in the global economy today and the market increasingly competitive. During the government work report of 2015, Prime Minister Li Keqiang first proposed that encouraging people to start their own business and to make innovations, so that can be a new engine of economic development under the China’s New Normal. The leader of the economic reform is the micro, small and medium enterprises. In addition to the support of policy from the government for SMEs in financing, the SMEs should try to reduce the cost of capital by business management. The SMEs also need to create unique core competitiveness, in order to gain a foothold in the ever-changing global market. Outsourcing as one of the important means to reduce operating costs, has been adopted by more and more enterprises. As an auxiliary function of enterprise, financial outsourcing is beneficial to reduce the management cost and improve the efficiency of management. It can also help SMEs focus on the core competitiveness of ascension. When SMEs enjoy the benefits of such financial outsourcing, they are also associated with the risk of outsourcing. If the enterprise does not have a clear understanding and effective management with the outsourcing risk, it will lead to the enterprise cannot reach the purpose of outsourcing, also called the failure of outsourcing activities. Therefore, while the SMEs choose financial outsourcing, they must have the analysis and evaluation system of outsourcing risk. In this paper, based on the above analysis of the background, we study the risk of SMEs financial outsourcing. And after introducing the content and the status quo of financial outsourcing, we discuss the financial risk when the enterprise using financial outsourcing, and classify the risk, then measure the risk response, which in order to offer the decision-making basis for the successful implementation of financial outsourcing activities.
A Study of Financial Risks of Listed Manufacturing Companies in China  [PDF]
Fang Fang
Journal of Financial Risk Management (JFRM) , 2016, DOI: 10.4236/jfrm.2016.54022
Abstract:
Financial risk is an objective phenomenon in economic activities. It has received extensive attention in theoretical and practical fields. For each company and operators in the market economy, the financial risk is an objective existence. The manufacturing industry as a pillar industry of China’s economic development, occupies a large proportion in China’s listed company. However because of the characteristics of its own manufacturing and the increasingly fierce market competition, some manufacturing listed companies went to bankruptcy because of financial risk crisis, so the research on manufacturing listed company financial risk has a very far-reaching significance. With the development of society, the financial risk is becoming more and more complex. This theory will combine research results and empirical analysis, define the concept of financial risk in manufacturing enterprises, use listed Chinese manufacturing companies as the research object, to analyze the cause of financial risk on the basis of reasoning analysis. This article aims to put forward measures to deal with financial risks, according to the Chinese manufacturing industry development situation, using both internal price control mechanism construction and financial risk management mechanism to protect the interests of stakeholders.
Climatic instability record during the Penultimate Glaciation: Evidence from Huining loess
Jianzhang Ren,Zhongli Ding,Dongsheng Liu,Hao Quan
Chinese Science Bulletin , 1997, DOI: 10.1007/BF02882674
Abstract:
An Integrated Model of Distributed Commodity Information Based on RESTful Web Services and Mashup
一种基于REST服务和Mashup的分布式商品信息集成模型*

Meng JianZhang Liyi,
孟健张李义

现代图书情报技术 , 2010,
Abstract: In this paper,a new model is proposed for distributed commodity information integration,which is built upon RESTful Web services and Mashup technology.And based on the model,a prototype system is developed for one-stop online Chinese book information search,and the applicability and efficiency of the model are tested in some level.
Page 1 /18251
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.