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Search Results: 1 - 10 of 9766 matches for " Jianzhang Bao "
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Interrelations among scientific fields and their relative influence revealed by input-output analysis
Zhesi Shen,Liying Yang,Jiansuo Pei,Menghui Li,Chensheng Wu,Jianzhang Bao,Tian Wei,Zengru Di,Ronald Rousseau,Jinshan Wu
Physics , 2015,
Abstract: In this paper, we try to answer two questions about any given scientific discipline: First, how important is each subfield and second, how does a specific subfield influence other subfields? We modify the well-known open-system Leontief Input-Output Analysis in economics into a closed-system analysis focusing on eigenvalues and eigenvectors and the effects of removing one subfield. We apply this method to the subfields of physics. This analysis has yielded some promising results for identifying important subfields (for example the field of statistical physics has large influence while it is not among the largest subfields) and describing their influences on each other (for example the subfield of mechanical control of atoms is not among the largest subfields cited by quantum mechanics, but our analysis suggests that these fields are strongly connected). This method is potentially applicable to more general systems that have input-output relations among their elements.
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.
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.
A PRELIMINARY ANALYSIS ON FLUCTUATIONS IN YEARLY NUMERICAL TENDENCY OF THE RED FOX IN HEILONGJIANG, CHINA
黑龙江省赤狐年数量趋势波动的初步分析

Jia Jingbo Ma Jianzhang,
贾竞波
,马建章

动物学研究 , 1989,
Abstract: Fluctuations in yearly numerical tendency of the Red Fox (Vulpes vulpes) in Heilongjiang province, China were analysed based on the fur purchase numbers during 13 years (1971-1983). Taking the interval between two peak years as a cycle, thenthere were 4 cycles in Total Area (whole province) Analysis, the interval on average was 3-year, the coelficient of variation was 23.57%. The datas were also analysed by dividing the Total Area into eight Subdivisional Areas and then combining their cycles for further analysis. In Subdivisions Combination Analysis, totally 26 cycles were obtained, with a peak year appearing for every 3.42 years, the coefficient of variation was 39.78% Results of statistical testing ooth in Total Area and Subdivisions Combination analyses revealed that fluctuations in yearly numerical tendency of the Red Fox coincided with random fluctuations. Among causes which effected fluctuations the density of Red fox was not main factor.
Breakthrough in synchronized fertilization and seedling production of the economic brown alga Hizikia fusiformis
海洋生物种质库种质技术研究进展Ⅱ——我国重要经济海藻羊栖菜同步受精种苗技术获得突破

Pang ShaoJun,Sun JianZhang,
逄少军
,孙建章

海洋科学 , 2006,
Abstract: 羊栖菜(Hizikia fusiformis)隶属褐藻门,圆子纲,墨角藻目,马尾藻科,羊栖菜属,是我国东海沿海地区重要的创汇经济海藻,2004年的产量约为6000t(干重),产品主要销往日本。除了作为海藻食品以外,羊栖菜的抽提物被发现含有抗肿瘤活性物质,具有激发免疫系统的作用,因而是一种潜在的重要海洋药物原材料。由于羊栖菜是一种多年生海藻,传统的养殖方式是从潮间带收割自然种群作为种苗,进行海上的筏式养殖,以假根形式完成渡夏,次年从假根再生的植株构成被养殖的主体。这种养殖方式决定了需要每年从自然种群或养殖种群中采集或者保留成吨的生物量作为种…
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