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Search Results: 1 - 10 of 43329 matches for " Fan Dai-He "
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Realization of stimulated emission-based detector and its application to antinormally ordered photodetection

Fan Dai-He,Bai Yun-Fei,ZhangHai-Long,Chen Jun-Jian,Zhang Jun-Xiang,Gao Jiang-Rui,

中国物理 B , 2010,
Abstract: Using a stimulated parametric down-conversion process combined with a conventional detector, we theoretically propose a scheme to realize the stimulated emission-based detector, and investigate the antinormally ordered correlation function and Fano factor for the coherent field based on it. Such a detection has advantages over the normally ordered one especially when the intensity of the field is weak.
Characteristic and Performance of Elementary Hemp Fibre  [PDF]
Dasong Dai, Mizi Fan
Materials Sciences and Applications (MSA) , 2010, DOI: 10.4236/msa.2010.16049
Abstract: This paper presents systematic and improved methodologies to characterize the surface and fracture of elementary hemp fibres by Field Emission Scanning Microscope (FE-SEM), determine the Microfibril Angles (MFA) by an advanced microscopy technology and examine the crystallinity by X-Ray Diffraction (XRD) and Fourier Transform Infrared (FTIR). The results showed that 1) There existed various deformations/defects in elementary hemp fibres, showing four types of deformations, namely kink bands, dislocations, nodes and slip planes. The crack on the surface of elementary fibres was the initial breaking point under stress; 2) Under tension the primary wall and secondary wall of hemp fibres showed different deformation and breaking behaviour. The crack initiated in a weak point of primary wall and subsequently propagated along radial direction from S1 to S2 layers; 3) The average MFA for the broken regions of S2 layer was 6.16? compared to 2.65? for the normal hemp fibres and the breaking of hemp fibres occurred at the points where had the biggest MFA; 4) The average MFA was 2.65? for S2 layer and 80.35? for S1 layer; 5) the Crystallinity Index (CI) determined by XRD and FTIR was very similar, showing the lattice parameters of the hemp fibres tested a = 6.97 Å, b = 6.26 Å, c = 11.88 Å and γ = 97.21?, and the ratio of 1423 to 896 cm-1 was found more suitable for CI evaluation for hemp fibres.
Classic swine fever virus NS2 protein leads to the induction of cell cycle arrest at S-phase and endoplasmic reticulum stress
Qing-hai Tang, Yan-ming Zhang, Li Fan, Gang Tong, Lei He, Chen Dai
Virology Journal , 2010, DOI: 10.1186/1743-422x-7-4
Abstract: Stable swine umbilical vein endothelial cell line (SUVEC) expressing CSFV NS2 were established and showed that the protein localized to the endoplasmic reticulum (ER). Cellular analysis revealed that replication of NS2-expressing cell lines was inhibited by 20-30% due to cell cycle arrest at S-phase. The NS2 protein also induced ER stress and activated the nuclear transcription factor kappa B (NF-κB). A significant increase in cyclin A transcriptional levels was observed in NS2-expressing cells but was accompanied by a concomitant increase in the proteasomal degradation of cyclin A protein. Therefore, the induction of cell cycle arrest at S-phase by CSFV NS2 protein is associated with increased turnover of cyclin A protein rather than the down-regulation of cyclin A transcription.All the data suggest that CSFV NS2 protein modulate the cellular growth and cell cycle progression through inducing the S-phase arrest and provide a cellular environment that is advantageous for viral replication. These findings provide novel information on the function of the poorly characterized CSFV NS2 protein.Classical swine fever (CSF) is a highly contagious and often fatal disease of pigs and is classified by the World Organization for Animal Health (OIE) as a notifiable (previously List A) disease due to its potential for rapid spread across national borders and the considerable socio-economic impact on the pig industry [1]. The causative agent of CSF is Classical swine fever virus (CSFV), which is classified as a member of the Pestivirus genus within the Flaviviridae family of viruses, accompanied by the genera Flavivirus and Hepacivirus (Hepatitis C viruses; HCV) (Lackner, Muller et al. 2004). CSFV contains a 12.3 kb positive-sense, single-stranded RNA genome that consists of 5' and 3' non-translated regions (NTR) flanking a large open reading frame that encodes a polyprotein of approximately 3898 amino acids. The polyprotein is processed into 12 mature proteins, namely, Npro, C,
Interaction Mechanism and Strategy of Brand Relationship and Brand Extension  [PDF]
He Liu, Lili Fan
Open Journal of Business and Management (OJBM) , 2013, DOI: 10.4236/ojbm.2013.13008
Abstract: As new products are generally difficult to be accepted by consumers, and the cost of initial market introduction is high, enterprises often choose to do market extension of an existing brand. Simultaneously, a successful brand extension can enhance the reputation of the original brand, and expand the brand value. But how can enterprise take a good brand extension? Through establishment of a dynamic model of brand extension under the brand relationship context, investigating the interaction mechanism between brand relationship and extension, and base on that, we developed a strategy model of interaction and improvement of brand relationship and brand extension.
Hypoxia induced amoeboid microglial cell activation in postnatal rat brain is mediated by ATP receptor P2X4
Fan Li, Lei Wang, Ji-Wei Li, Min Gong, Liang He, Rui Feng, Zhen Dai, Shu-Qing Li
BMC Neuroscience , 2011, DOI: 10.1186/1471-2202-12-111
Abstract: We first examined the immunoexpression of P2X4, P2X7 and P2Y12 in the corpus callosum (CC) and subependyma associated with the lateral ventricles where both areas are rich in AMC. Among the three purinergic receptors, P2X4 was most intensely expressed. By double immunofluorescence, P2X4 was specifically localized in AMC (from P0 to P7) but the immunofluorescence in AMC was progressively diminished with advancing age (P14). It was further shown that P2X4 expression was noticeably enhanced in P0 day rats subjected to hypoxia and killed at 4, 24, 72 h and 7 d versus their matching controls by double labeling and western blotting analysis. P2X4 expression was most intense at 7 d whence the inflammatory response was drastic after hypoxia. We then studied the association of P2X4 with cytokine release in AMC after hypoxic exposure. In primary microglial cells exposed to hypoxia, IL-1β and TNF-α protein levels were up-regulated. Blockade of P2X4 receptor with 2', 3'-0-(2, 4, 6-Trinitrophenyl) adenosine 5'-triphosphate, a selective P2X1-7 blocker resulted in partial suppression of IL-1β (24% vs hypoxic group) and TNF-α expression (40% vs hypoxic group). However, pyridoxal phosphate-6-azo (benzene-2, 4-disulfonic acid) tetrasodium salt hydrate, a selective P2X1-3, 5-7 blocker did not exert any significant effect on the cytokine expression.It is concluded that P2X4 which is constitutively expressed by AMC in postnatal rats was enhanced in hypoxia. Hypoxia induced increase in IL-1β and TNF-α expression was reversed by 2', 3'-0-(2, 4, 6-Trinitrophenyl) adenosine 5'-triphosphate suggesting that P2X4 mediates ATP induced AMC activation and its production of proinflammatory cytokines.Perinatal brain injury occurs in approximately 4 per 1000 births [1] with exposure to hypoxic-ischemic insults and premature delivery (before 37 weeks of gestation) as major contributing factors. The defining feature of neuropathology in hypoxia and ischemia encephalopathy is the injury susceptibility
An analysis of reclamation trend in the Early Qing Dynasty from the view point of Kangxi to Qianlong cultivation and reclamation policies

HE Fan-neng,DAI Jun-hu,GE Quan-sheng,

地理研究 , 2005,
Abstract: Being a kind of agricultural and productive action,cultivation and reclamation have closely correlated with certain governmental policies.In the Qing Dynasty,the agricultural technology was in a poor condition,and the importance of certain policies of cultivation and reclamation was even more distinctive.As a result,a thorough analysis and implementation of the cultivation policies at that time is a very important way to know the cultivation and reclamation in the Qing Dynasty.The cultivation and reclamation policies during Kangxi,Yongzheng and Qianlong periods in the Qing Dynasty were analyzed in this paper,and the spatial and temporal distributions of cultivation and reclamation during the early Qing Dynasty were also set forth.The characteristics of cultivation and reclamation during these periods were as follows.The Kangxi period was characterized by the resume of the past cultivation that was stopped during the war.The most important aspect of cultivation during the Yongzheng period was the transitional character that was transformed from the resume of past cultivation to the settlement of requiring more cultivated land due to the quick increase of population.And the most important task of cultivation for the government duing the Qianlong period was to solve the problems of increasing poor population.Various cultivated policies were reflected in the field of reclamation and cultivation at that time.During the Kangxi period,the cultivation was resumed,and the cultivation during Yongzheng period was marked by the transformation from the reclamation of wasted cultivated land to the cultivation of virgin soils in some areas.And the characteristics of cultivation during the Qianlong period were the clear representations of cultivation of virgin soils.In the meantime,the cultivation in the early Qing Dynasty was distributed spatially.
A new ignition scheme using hybrid indirect-direct drive for inertial confinement fusion
Zhengfeng Fan,Mo Chen,Zhensheng Dai,Hong-bo Cai,Shao-ping Zhu,W. Y. Zhang,X. T. He
Physics , 2013,
Abstract: A new hybrid indirect-direct-drive ignition scheme is proposed for inertial confinement fusion: a cryogenic capsule encased in a hohlraum is first compressed symmetrically by indirect-drive x-rays, and then accelerated and ignited by both direct-drive lasers and x-rays. A steady high-density plateau newly formed between the radiation and electron ablation fronts suppresses the rarefaction at the radiation ablation front and greatly enhances the drive pressure. Meanwhile, multiple shock reflections at the fuel/hot-spot interface are prevented during capsule deceleration. Thus rapid ignition and burn are realized. In comparison with the conventional indirect drive, the hybrid drive implodes the capsule with a higher velocity ($\sim4.3\times10^7$ cm/s) and a much lower convergence ratio ($\sim$25), and the growth of hydrodynamic instabilities is significantly reduced, especially at the fuel/hot-spot interface.
Study on group intervention regarding interpersonal trust among college students with campus psychodrama  [PDF]
Ying Ge, Huamin He, Linna Dai
Health (Health) , 2011, DOI: 10.4236/health.2011.37076
Abstract: Purpose: To explore the interventional effects of campus psychodrama on improving the interpersonal trust among college students. Methods: 16 college students with low levels of interpersonal trust were selected to conduct 5 sessions of psychodrama therapy. Results: The subject group has gone through stages of ice breaking, performance, and sharing. Through group counseling with psychodrama, the social avoidance and distressful behaviors of the subjects have been alleviated, and their levels of interpersonal trust demonstrated notable change. Conclusion: Campus psychodrama is an effective group counseling approach for improving college students’ interpersonal trust.
The Construction of Human Resource Management Cloud Service Platform  [PDF]
Liangtie Dai, Yang He, Guangdong Xing
Intelligent Information Management (IIM) , 2015, DOI: 10.4236/iim.2015.71001
Abstract: Human resource management service faced the challenges of promoting efficiency, costs saving, quick responding and so on. In order to face these challenges, this paper puts forward a “6 + 1” structure of human resource management service combined with some characteristics of cloud computing, elaborates the service mode of the cloud service platform based on this structure, the characteristics and challenges of the platform, and hopes to provide a new service perspective to human resource management.
Mechanistic Study on the Nuclear Modifier Gene MSS1 Mutation Suppressing Neomycin Sensitivity of the Mitochondrial 15S rRNA C1477G Mutation in Saccharomyces cerevisiae
Qiyin Zhou, Wei Wang, Xiangyu He, Xiaoyu Zhu, Yaoyao Shen, Zhe Yu, Xuexiang Wang, Xuchen Qi, Xuan Zhang, Mingjie Fan, Yu Dai, Shuxu Yang, Qingfeng Yan
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0090336
Abstract: The phenotypic manifestation of mitochondrial DNA (mtDNA) mutations can be modulated by nuclear genes and environmental factors. However, neither the interaction among these factors nor their underlying mechanisms are well understood. The yeast Saccharomyces cerevisiae mtDNA 15S rRNA C1477G mutation (PR) corresponds to the human 12S rRNA A1555G mutation. Here we report that a nuclear modifier gene mss1 mutation suppresses the neomycin-sensitivity phenotype of a yeast C1477G mutant in fermentable YPD medium. Functional assays show that the mitochondrial function of the yeast C1477G mutant was impaired severely in YPD medium with neomycin. Moreover, the mss1 mutation led to a significant increase in the steady-state level of HAP5 (heme activated protein), which greatly up-regulated the expression of glycolytic transcription factors RAP1, GCR1, and GCR2 and thus stimulated glycolysis. Furthermore, the high expression of the key glycolytic enzyme genes HXK2, PFK1 and PYK1 indicated that enhanced glycolysis not only compensated for the ATP reduction from oxidative phosphorylation (OXPHOS) in mitochondria, but also ensured the growth of the mss1(PR) mutant in YPD medium with neomycin. This study advances our understanding of the phenotypic manifestation of mtDNA mutations.
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