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Search Results: 1 - 10 of 29118 matches for " Zhu Zhigang "
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Effects of Ion Doping on the Optical Properties of Dye-Sensitized Solar Cells  [PDF]
Di Gu, Yanji Zhu, Zhigang Xu, Nan Wang, Chuang Zhang
Advances in Materials Physics and Chemistry (AMPC) , 2014, DOI: 10.4236/ampc.2014.410022
Abstract: Dye-sensitized solar cells (DSC) play a leading role in the third generation photovoltaics due to their low cost, easy fabrication process, high conversion efficiency and good stability. As a media of dye adsorption, electron transport, and electrolyte diffusion, the nanocrystalline semiconductor photoanode plays a key role during light-to-electricity conversion in DSC. This paper studies the influence of different ions doping and different concentration of ion doping on the electrical and optical properties of DSC, through the photoelectric property test of DSC. We learn that Zn2+ doped TiO2 photoanode is the best. At the same time there was an optimum doping concentration which was 0.05% (mole fraction).
Neural Networks for Omni-View Road Image Understanding
Zhu Zhigang,Xu Guangyou,
Zhu Zhigang
,Xu Guangyou

计算机科学技术学报 , 1996,
Abstract: This paper presents a new approach to the outdoor road scene understand-ing by using omni-view images and backpropagation networks. Both the road directions used for vehicle heading and the road categories used for velilcle local-ization are determined by the integrated system. There are three main features about the work. First, an omni-view image sensor is used to extract image samples, and the original image is preprocessed so that the inputs of the net-work is rotation-invariant and simple. Second, the problem of the network size,especially the number of the hidden units, is decided by the analysis of system-atic experimental results. Finally, the internal representation, which reveals the properties of the neural network, is analyzed in the view point of visual signal processing. Experimental results with real scene images are encouraging.
An Analysis of Influencing Factors in Collaboration of the Three Industries in Sichuan Province, China
Zhigang Liu,Guanghui Zhu,Caibin Zhu
International Journal of Business Administration , 2012, DOI: 10.5430/ijba.v3n6p113
Abstract: In the past few years, the Chinese government has promulgated in succession seven strategic emerging industries development plans, ten industrial development plans, Chengdu-Chongqing economic zone planning and the outline of the 12th five-year plan. The country has attached more and more importance on the mode of industrial development, the direction of development and path of development. The industries should not be developed rapidly, but should also be developed with health and collaboration. Industrial collaboration is a self requirement of industrial development in the future and is also a long-term target. This article studies the collaborative development condition of the three industries in Sichuan Province under the above background. Through an analysis on the establishment of indicator system for evaluation on collaboration of the three industries, it is discovered that there are still a lot of problems that are urgent to be adjusted and improved in collaborative development of the three industries in Sichuan Province. Through the Principal Component Analysis, we find out the principal influencing factors for collaborative development of the three industries in Sichuan Province, which includes the three major influencing factors of relevant industries in construction and real estate, tourism industry and great industrial industry. Given the existing problems at present in collaboration of the three industries in Sichuan Province, this article proposes the five policy suggestions of accelerating adjustment of industrial structure, making full use of resource endowment to develop regional economy, boost healthy and orderly development of construction and real estate industry, encouraging rapid development of tourism industry, bringing in steady development of new types of strategic industries and carrying forward industrial transfer and supporting industrial cluster. The aim of these five policy suggestions is to promote collaborative development of the three industries in Sichuan Province, resolve the issue of 1+1>2 and 1+1+1>3, better facilitate industrial promotion in Sichuan Province and lay a foundation and provide conditions for fast and benign development of industries in Sichuan Province.
Size-Tunable Porous Anodic Alumina Nano-Structure for Biosensing  [PDF]
Zhigang Zhu, Luis Garcia-Gancedo, Qiang Liu, Andrew Flewitt, William I. Milne, Francis Moussy
Soft Nanoscience Letters (SNL) , 2011, DOI: 10.4236/snl.2011.13010
Abstract: A porous anodic alumina (PAA) film has been investigated to realise highly-ordered nano-porous structures. A two-step anodization process is used to anodize aluminium into size-controllable aluminium oxide. In this paper, we investigate how anodization parameters affect nano-porous structures, such as voltage and time of pretreatment, anodization voltage and time, pore widening time. The results showed pretreatment is important to obtain a smooth surface for anodizing. The pore size is controllable between 30 and 80 nm, with a linear fit curve. The interpore size is constant at around 95 nm, and the pore densities are between 1010 and 1011 cm–2. The formation of straight vertical walls is crucial if the PAA film is to be subsequently used as the template for the growth of metal nanowire arrays.
An Analysis of Influencing Factors in Collaborative Development of the Secondary Industry and the Tertiary Industry in Chengdu, China
Zhigang Liu,Yunqing Tan,Caibin Zhu
Research in World Economy , 2013, DOI: 10.5430/rwe.v4n1p35
Abstract: This paper employs the systematic synergetics model to analyze conditions of collaborative development of the secondary industry and the tertiary industry in Chengdu, China and uses grey correlation method to analyze the primary influencing factors that affect collaboration between the secondary industry and the tertiary industry in Chengdu. Then, taking into consideration of the influencing factors, this paper proposes policies and suggestions to facilitate collaboration between the secondary industry and the tertiary industry so as to better realize rapid and healthy development of economy in Chengdu.
Early Methanogenic Colonisation in the Faeces of Meishan and Yorkshire Piglets as Determined by Pyrosequencing Analysis
Yong Su,Gaorui Bian,Zhigang Zhu,Hauke Smidt,Weiyun Zhu
Archaea , 2014, DOI: 10.1155/2014/547908
Abstract: Gut methanogenic archaea of monogastric animals are considered to be related to energy metabolism and adipose deposition of the host; however, information on their development in young piglets is limited. Thus, to investigate early methanogenic colonisation in the faeces of Meishan and Yorkshire piglets, faecal samples were collected from piglets at 1, 3, 7, and 14 days after birth and used to analyse the methanogenic community with 16S rRNA gene pyrosequencing. Results showed that the diversity of the methanogenic community in the faeces of neonatal piglets decreased from one to 14 days of age, as the total methanogen populations increased. The age of piglets, but not the breed, significantly affected the diversity of the methanogenic community which was dominated by the genus Methanobrevibacter. From the ages of one to 14 days, the abundance of M. smithii-related operational taxonomic units (OTUs) increased significantly, while the abundances of M. thaueri- and M. millerae-related OTUs decreased significantly. The substitution of M. smithii for M. thaueri/M. millerae was faster in Yorkshire piglets than in Meishan piglets. These results suggest that the early establishment of microbiota in neonatal piglets is accompanied by dramatic changes in the methanogenic community, and that the changes vary among pigs of different genotypes. 1. Introduction Methanogenic archaea exist widely in the gastrointestinal (GI) tract of many vertebrates and invertebrates [1–3]. Methanogens can use hydrogen and other compounds such as formate, methanol, and acetate, as electron donors for the production of methane. Methane formation not only contributes to global warming as a greenhouse gas, but it also represents an energy loss for the animal [4]. Recently, methanogenic archaea in the gut of monogastric animals, including humans, have been studied intensively because gut methanogens are considered to be related to energy metabolism and adipose deposition of the host [5]. In addition, methane produced by methanogens might play an important role in the pathogenesis of several intestinal disorders, including colon cancer, inflammatory bowel disease, irritable bowel syndrome, and diverticulosis [6]. Thus far, only limited reports on gut methanogens in pigs have been available. Based on archaeal 16S ribosomal RNA (rRNA) gene clone library analysis, methanogens belonging to the genus Methanobrevibacter were found to be predominant in pig faeces [7, 8]. The GI microbiota of newborn animals play a fundamentally important role in the development of intestinal function and the
A Reconstruction Method of Generalized Sampling Based on Generalized Inverse
Zhu Zhaoxuan, Wang Houjun, Wang Zhigang, Zhang Hao
Metrology and Measurement Systems , 2010, DOI: 10.2478/v10178-010-0015-7
Abstract: This paper considers the problem of reconstructing a class of generalized sampled signals of which a special case occurs in, e.g., a generalized sampling system due to non-ideal analysis basis functions. To this end, we propose an improved reconstruction system and a reconstruction algorithm based on generalized inverse, which can be viewed as a reconstruction method that reduces reconstruction error as well. The key idea is to add an additional channel into a generalized sampling system and apply the generalized inverse theory to the reconstruction algorithm. Finally, the approach is applied, respectively, to an oscilloscope, which shows the proposed method yields better performance as compared to the existing technique.
Identification of a DNase activated inXenopus egg extracts undergoing apoptosis
Shan Zhu,Zhengfan Jiang,Bo Zhang,Zhigang Lu,Zhonghe Zhai
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883826
Abstract: A cell-free apoptosis system was established by adding dATP and cytochrome c toXenopus laevis egg extracts S-150. Accompanied by an incubation process, an apoptosis-specific DNase was activated in egg extracts which depended on Mg2+ and inhibited by Zn2+. Two nucleases existing in egg extracts were revealed by in-gel nuclease assay. Further experiments showed that 27 ku nuclease which was different from other Ca2+ /Mg2+ -dependent nucleases was a possible candidate involved in apoptosis.
Specific degradation of keratin in Xenopus laevis egg extracts undergoing apoptosis
Shan Zhu,Zhigang Lu,Yingli Sun,Zhonghe Zhai
Chinese Science Bulletin , 2000, DOI: 10.1007/BF02909691
Abstract: Cytochrome c activates apoptosis specific protease XCPP32 when being added to Xenopus laevis egg extracts, and induces apoptosis in this cell-free system. During apoptosis, cyto-skeleton proteins in egg extracts are degraded. Western blot assay indicates that 42-ku acidic keratin in egg extracts has been degraded by XCPP32. The degradation of 42-ku keratin may be crucial in apoptosis.
Mitogenomic analysis of the genus Panthera
Lei Wei,XiaoBing Wu,LiXin Zhu,ZhiGang Jiang
Science China Life Sciences , 2011, DOI: 10.1007/s11427-011-4219-1
Abstract: The complete sequences of the mitochondrial DNA genomes of Panthera tigris, Panthera pardus, and Panthera uncia were determined using the polymerase chain reaction method. The lengths of the complete mitochondrial DNA sequences of the three species were 16990, 16964, and 16773 bp, respectively. Each of the three mitochondrial DNA genomes included 13 protein-coding genes, 22 tRNA, two rRNA, one OLR, and one control region. The structures of the genomes were highly similar to those of Felis catus, Acinonyx jubatus, and Neofelis nebulosa. The phylogenies of the genus Panthera were inferred from two combined mitochondrial sequence data sets and the complete mitochondrial genome sequences, by MP (maximum parsimony), ML (maximum likelihood), and Bayesian analysis. The results showed that Panthera was composed of Panthera leo, P. uncia, P. pardus, Panthera onca, P. tigris, and N. nebulosa, which was included as the most basal member. The phylogeny within Panthera genus was N. nebulosa (P. tigris (P. onca (P. pardus, (P. leo, P. uncia)))). The divergence times for Panthera genus were estimated based on the ML branch lengths and four well-established calibration points. The results showed that at about 11.3 MYA, the Panthera genus separated from other felid species and then evolved into the several species of the genus. In detail, N. nebulosa was estimated to be founded about 8.66 MYA, P. tigris about 6.55 MYA, P. uncia about 4.63 MYA, and P. pardus about 4.35 MYA. All these estimated times were older than those estimated from the fossil records. The divergence event, evolutionary process, speciation, and distribution pattern of P. uncia, a species endemic to the central Asia with core habitats on the Qinghai-Tibetan Plateau and surrounding highlands, mostly correlated with the geological tectonic events and intensive climate shifts that happened at 8, 3.6, 2.5, and 1.7 MYA on the plateau during the late Cenozoic period.
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