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Search Results: 1 - 10 of 24317 matches for " YIN Di "
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Research on Fuzzy Comprehensive Evaluation of Passenger Satisfaction in Urban Public Transport  [PDF]
Di Yin
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.93034
Abstract: Bus has become an integral traffic mode for urban residents along with the development of public transport system; and as a kind of public service, urban public transport is the basic infrastructure closely related to people, and is also required to constantly improve its service levels to better serve people. Therefore, how to evaluate its service level has become one of the important projects that need to be studied. Based on establishing the mathematical model of fuzzy comprehensive evaluation and illustrated by the case of Xi’an, this paper verifies the model rationality, assesses the bus development level in Xi’an, and further puts forward countermeasures for its bus services according to the results.
An Initial Investigation on the Distribution, Living Conditions and Traits of the Hazel in Great Xing’an Ridge Region  [PDF]
Qian Wang, Shuchai Su, Dejie Yin, Zhongqiu Tang, Di Xu
Natural Resources (NR) , 2011, DOI: 10.4236/nr.2011.24029
Abstract: To take full advantage of the natural hazel resources and improve its yield and quality in Great Xing’an Ridge region, we carried out an initial investigation. The result showed that: there are two species in this area: Corylus heterophlla and Corylus mandshurica. They mainly distribute from south of XinLin town, HuMa county, Heilongjiang province to south boundary of Great Xing’ an Ridge in mountain and hilly areas. Most of hazel in this area was under the state of natural growth with no scientific man-management. Soil where Corylus heterophlla grew was about 40 cm to 50 cm and Corylus mandshurica was 30 cm to 45 cm. The main plant disease was powdery mildew and insect pest were Curculio dieckmani, Zeuzera sp. and Faust Cockchafer. 100-seed weight of Corylus heterophylla was more than twice of Corylus mandshuria. However, Corylus mandshuria was plumper, had much more kernel and much less empty shell than Corylus heterophylla, and what’s more, shell sickness of it turned to be significantly thinner than Corylus heterophylla, all of which showed great cultivation value and economic commodity value.
Endovascular Treatment Options of Acute Limb Ischemia  [PDF]
Di Zhang, Wensheng Lou, Guoping Chen, Xindao Yin, Jianping Gu
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2013, DOI: 10.4236/ijmpcero.2013.21006
Abstract:
Acute limb ischemia is a urgent condition which occurs when there is an abrupt interruption of blood flow into an extremity usually because of either embolic or thrombotic vascular occlusion. Restoration of perfusion through early intervention can decrease amputation and mortality. Contemporary treatment includes both surgery and endovascular techniques. There is a rapid progress in endovascular intervention therapy. This article aims to make a comprehensive review of the endovascular intervention options of acute limb ischemia.
A Selection Region Based Routing Protocol for Random Mobile ad hoc Networks with Directional Antennas
Di Li,Changchuan Yin,Changhai Chen
Mathematics , 2010,
Abstract: In this paper, we propose a selection region based multihop routing protocol with directional antennas for wireless mobile ad hoc networks, where the selection region is defined by two parameters: a reference distance and the beamwidth of the directional antenna. At each hop, we choose the nearest node to the transmitter within the selection region as the next hop relay. By maximizing the expected density of progress, we present an upper bound for the optimum reference distance and derive the relationship between the optimum reference distance and the optimum transmission probability. Compared with the results with routing strategy using omnidirectional antennas in \cite{Di:Relay-Region}, we find interestingly that the optimum transmission probability is a constant independent of the beamwidth, the expected density of progress with the new routing strategy is increased significantly, and the computational complexity involved in the relay selection is also greatly reduced.
Shengmai Suppressed Vascular Tension in Umbilical Arteries and Veins of Human and Sheep  [PDF]
Xiaohui Yin, Xiuxia Gu, Yun He, Di Zhu, Jie Chen, Jue Wu, Xueqin Feng, Jinhao Li, Caiping Mao, Zhice Xu
Pharmacology & Pharmacy (PP) , 2015, DOI: 10.4236/pp.2015.66030
Abstract: Objective—The umbilical cord is a critical pathway between mothers and fetuses, and regulations of umbilical vessel tension are important for fetal growth. Shengmai is an herbal medicine being used in treatments of cardiovascular diseases. However, effects of Shengmai on human blood vessels and related pharmacological mechanisms are unclear. Methods—This study investigated the effects of related mechanisms of Shengmai and its key compounds on human and sheep umbilical arteries and veins using organ bath systems. Key Findings—Shengmai significantly suppressed phenylephrine-stimulated vasoconstriction in umbilical arteries and veins. NG-Nitro-L-arginine Methyl Estercould not change the Shengmai-suppressed vasoconstriction in human and sheep umbilical vessels. Among four key compounds of Shengmai, Ginsenoside Re, Ginsenoside Rb1, Ginsenoside Rg1, and Schisandrin, only Ginsenoside Re showed the significant effect similar to Shengmai’s in the umbilical vessels. In Ca2+-free solution, Ginsenoside Re did not affect vasoconstriction. In addition, caffeine- or phenylephrine-stimulated vasoconstriction were not changed by Ginsenoside Re. Either charybdotoxin or glibenclamide could inhibit Ginsenoside Re-caused inhibition of the stimulated vasoconstriction in both human and sheep umbilical vessels, where 4-aminopyridine did not show the similar inhibitory effect. Conclusion—The results provide new information on Shengmai’s effects and underlying mechanisms in umbilical vessels. Importantly, the information gained offers interesting potential for developing new drugs acting on umbilical cords for fetal medicine.
Associations of Education Level and Bone Density Tests among Cognitively Intact Elderly White Women in Managed Medicare
Di Shi,Michael T. Yin,Qiuhu Shi,Donald R. Hoover
Current Gerontology and Geriatrics Research , 2012, DOI: 10.1155/2012/179150
Abstract: Objectives. To examine associations between having bone density tests and level of education among white elderly women in managed Medicare. Method. Data from the ninth through twelfth cohort (2006–2009) of the Medicare Health Outcome Survey (HOS) of managed Medicare plans were analyzed; 239331 white elderly women were included. Respondents were grouped by education level and the percentages of respondents who had lifetime bone density testing done among each group were analyzed. Results. 62.7% of respondents with less than a high school education reported previously taking a bone density test. This was lower than the 73.8% for respondents who completed high school and the 81.0% for respondents with more than a high school education. When potential confounding factors such as age, body mass index, marital status, smoking history, year of HOS survey, and region were factored in, the odds ratios of having a bone density test when compared to respondents with less than a high school education were 1.61 and 2.39, respectively, for those with just a high school education and more than a high school education ( ). Conclusion. Higher education was independently associated with greater use of bone density test in these elderly white women. 1. Introduction In recent years, many studies have found a link between education level and the overall health of a person. Lower education was found worldwide to be correlated with increases in many areas of health risk including cardiac dysfunction [1], preterm birth [2], mortality [3], and others diseases [4, 5]. Furthermore, these effects of education disparity on greater disease prevalence [4] and lower life expectancy may be growing [6]. When treating patients with lower education levels, physicians spend less time discussing health related issues [7] which may lead to gaps in health awareness including the use of preventive services. For example, lower levels of education have been linked to lower use of public health services in Brazil [8] and lower use of HIV testing in Portugal’s immigrant population [9]. The goal of this paper is to see if lower education also effects use of bone mineral density test among a group that would benefit most from testing, elderly white women in the United States. Bone fractures can have devastating consequences including pain, loss of mobility function, and death. Among elderly, particularly postmenopausal women, deterioration in bone mass progressively increases the risk of fragility fractures compared to people with healthy bone [10]. While all elderly women in America are at higher
Characterization and Determination of the Alkaloid Metabolites of Evodiae fructus in Rat Urine by Liquid Chromatography-Tandem Mass Spectrometry Detection
Rui Yan,Qier Mu,Yin Wang,Youping Liu,Xin Di
Molecules , 2011, DOI: 10.3390/molecules16075822
Abstract: The lack of authentic standards limits the quantitative analysis of herbal drugs in biological samples. This present work demonstrated a practicable assay of herbs and their metabolites independent of the availability of authentic standards. A liquid chromatography–electrospray ionization–mass spectrometry (LC–ESI–MS) method for the qualitative and quantitative determination of the metabolites after oral administration of Evodiae fructus and Zuojinwan preparation in rat urine has been developed. Urine samples extracted with a protein precipitation procedure were separated on a C18 column using a mixture of water (containing 0.1% formic acid) and acetonitrile (30:70, v/v) as mobile phase. The detection was performed by MS with electrospray ionization interface in positive selected reaction monitoring (SRM) mode. One urine sample after administration was selected as 'standard'. The method validation was carried out according to a conventional method that was calibrated by authentic standards. The fully validated method was applied to the pharmacokinetic study of the metabolites in rat urine. The results could provide evidence to explain the combination of Coptidis rhizoma and Evodiae fructus in terms of elimination.
Microstructure Variation of Cold Deformed MP159 Alloy during Aging
Guangwei HAN,Di FENG,Ming YIN,Nanseng YANG,

材料科学技术学报 , 1996,
Abstract: By comparing the relationship of room temperature yield strength with the reduction of cold rolled MP159 alloy before and after aging at 650℃, and by means of TEM examination on the corresponding microstructures, the occurrence of fcc(α)→hcp(ε) martensitic transition in MP159 alloy during cold deformation and the variation of the platelet E phase during aging have been Studied. The results show that the platelet E phase is really formed when the cold deformation reaches a critical value, and both the amount and the width of the platelet B phase would further increase during 650℃ aging. The increases of the amount and the width of the platelet εphase result in an additional increase of yield strength. Therefore, it is concluded that the additional hardening effect of MP159 alloy after aging is not only from the precipitation of Ni3X disperse phase but also from the volume fraction increase of the platelet ε phase. Further occurrence of the martensitic transition during aging may be due to the elimination of residual compression stress within matrix induced by the fcc(α)→hcp(ε) transition during cold deformation
A Selection Region Based Routing Protocol for Random Mobile ad hoc Networks
Di Li,Changchuan Yin,Changhai Chen,Shuguang Cui
Mathematics , 2010,
Abstract: We propose a selection region based multi-hop routing protocol for random mobile ad hoc networks, where the selection region is defined by two parameters: a reference distance and a selection angle. At each hop, a relay is chosen as the nearest node to the transmitter that is located within the selection region. By assuming that the relay nodes are randomly placed, we derive an upper bound for the optimum reference distance to maximize the expected density of progress and investigate the relationship between the optimum selection angle and the optimum reference distance. We also note that the optimized expected density of progress scales as $\Theta(\sqrt{\lambda})$, which matches the prior results in the literature. Compared with the spatial-reuse multi-hop protocol in \cite{Baccelli:Aloha} recently proposed by Baccelli \emph{et al.}, in our new protocol the amount of nodes involved and the calculation complexity for each relay selection are reduced significantly, which is attractive for energy-limited wireless ad hoc networks (e.g., wireless sensor networks).
Receptor Conversion between Primary Tumors and Distant Metastases in 121 Cases of Metastatic Breast Cancer  [PDF]
Chaoying Wang, Lijun Di, Huiping Li, Kun Yan, Shanshan Yin, Guohong Song, Hanfang Jiang, Xu Liang, Ying Yan, Bin Shao, Fengling Wan, Jun Ren
International Journal of Clinical Medicine (IJCM) , 2013, DOI: 10.4236/ijcm.2013.42020
Abstract:


The article published in Vol.4 No.2 102-107, 2013 has been withdrawn by the authors for further revision. This paper will be re-submitted to IJCM after the authors revise it.


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