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Search Results: 1 - 10 of 39421 matches for " DONG Tao "
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Comparison between a numerical model and an investigating model on the uplift of the Qinghai-Xizang (Tibetan) Plateau
Tao Zeng,Wenjie Dong
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02883575
Abstract: A comparison between a nttmcrical model (NM) and an investigationg model (IM) on the uplift of the Qinehsi-Xhng Plateau was condueted. Resuhs show that the NM is capable of describing the uplifting proc-of the plateau. They are in good agreement with each other concerning the major uplifting processes.
Optimization of nanocavity field enhancement using two-dimensional plasmonic photonic crystals
Xing Tao,ZhenChao Dong
Chinese Science Bulletin , 2012, DOI: 10.1007/s11434-011-4832-1
Abstract: We have investigated the influence of Ag nanorod radius (r) on the resonant modes of a two-dimensional plasmonic photonic crystal (PPC) with dipole sources embedded into the central vacancy area, using finite-difference time-domain methods. Both the localized surface plasmon (LSP) mode of individual Ag nanorods and the resonant cavity mode of PPC are found to vary as a function of r. The resonant cavity mode is strongly enhanced as r is increased, while the LSP signal will eventually become no longer discernable in the Fourier spectrum of the time-evolved field. An optimized condition for the nanocavity field enhancement is found for a given PPC periodicity (e.g. d = 375 nm) with the critical nanorod radius r c = d/3. At this point the resonant cavity mode has the strongest field enhancement, best field confinement and largest Q-factor. We attribute this to competition between the blocking of cavity confined light to radiate out when the cavity resonant frequency falls inside the opened photonic stopband as r reaches r c, and the transfer of cavity mode energy to inter-particle plasmons when r is further increased.
Novel Design of Ultra-Wideband Printed Double-Sleeve Monopole Antenna
Tao Dong;Yaping Chen
PIER Letters , 2009, DOI: 10.2528/PIERL09052805
Abstract: A novel design of printed sleeve monopole antenna is presented in this paper. Because of using double-sleeve and CPW-fed technique, this antenna has advantages of ultra-wideband (UWB) impedance characteristic, simple structure, easy fabrication and low cost. The details of simulated and experimental results for the proposed design are presented and discussed. This antenna can be designed for UWB wireless communication applications.
On the General Consensus Protocol in Multiagent Networks with Double-Integrator Dynamics and Coupling Time Delay
Tao Dong,Xiaofeng Liao
Abstract and Applied Analysis , 2013, DOI: 10.1155/2013/590894
Quantitative evaluation of the degrees of qualitative syndromes commonly encountered in patients with coronary heart disease
Dong-tao Li
Zhong Xi Yi Jie He Xue Bao , 2010,
Abstract: Objective: To establish a quantitative model for evaluating the degree of traditional Chinese medicine (TCM) syndromes often seen in patients with coronary heart disease (CHD). Methods: Medical literature concerning clinical investigation of TCM syndromes of CHD was collected and organized, and the “Hall for Workshop of Metasynthetic Engineering” expert symposium method was applied. First, the 100 millimeter scaling was used for combining with scoring on degree of symptoms to establish a quantitative criterion for classification of symptom degree in CHD patients, and the model was established by using comprehensive analytic hierarchy process as the mathematical tool to estimate the weight of the criterion for evaluating qualitative syndromes in various layers by specialists. Then the model was verified in clinical practice and the outcomes were compared with fuzzy evaluation from the specialists.Results: A total of 287 clinical observation forms on CHD cases were collected, and 167 forms were available after excluding any irregular forms. The results showed that basic coincidence rate between the outcomes derived from specialists and those from the model was 68.26% (114/167), and part coincidence rate was 88.62% (148/167).Conclusion: This model, with good rationality and feasibility, has a high coincidence rate with fuzzy evaluation from specialists, and can be promoted in clinical practice. It is a good quantitative model for evaluating the degree of TCM syndromes of CHD.
A study of diagnostic criteria for traditional Chinese medicine syndromes in osteoporosis
Dong-tao Li
Zhong Xi Yi Jie He Xue Bao , 2011,
Abstract: Objective: To establish diagnostic criteria for common traditional Chinese medicine (TCM) syndromes in osteoporosis. Methods: Based on the collection and analysis of related medical literature, clinical investigation, and expert discussion, a draft of preliminary diagnostic criteria for the basic syndromes of TCM in patients with osteoporosis was formulated. Then it was used in clinic for verification and revised repeatedly until a formal version of diagnostic criteria was satisfactorily achieved.Results: The basic syndromes listed in the diagnostic criteria for patients with osteoporosis consisted of two parts: qualitative diagnosis and localization diagnosis. Results of qualitative diagnosis showed that the qualitative syndromes included damage of essence, deficiency of vital energy, deficiency of yin, deficiency of yang and blood stasis. The localization diagnosis showed that location of osteoporosis is bone and corresponds to the kidney, and also involves liver, lung, spleen (stomach) and heart. The diagnostic content has established the specific symptoms and the non-specific symptoms during various stages. Each of the above syndromes could be diagnosed according to a specific combination of its corresponding symptoms or signs. The clinical verification results showed that the total matching ratio of qualitative diagnosis was 80.56% between the diagnoses made according to the criteria and the diagnoses acquired from the experts' experience, and the total matching ratio of localization diagnosis was 85.56%.Conclusion: The TCM syndrome diagnostic criteria for osteoporosis is generally consistent with TCM clinical practice, worthy of further popularization and application in clinical practice.
Quantitative evaluation of the degrees of traditional Chinese medicine qualitative syndromes of osteoporosis
Dong-tao Li
Zhong Xi Yi Jie He Xue Bao , 2012,
Abstract: OBJECTIVE: To establish a quantitative estimate model for diagnosing traditional Chinese medicine (TCM) syndromes of patients with osteoporosis.METHODS: Symptoms and signs of osteoporosis and methodology related to syndrome research were collected by reviewing medical literature.The symptoms and sighs were quantitatively classified into three, two or one category according to a 100-mm visual analog scale. Fuzzy comprehensive evaluation model of TCM qualitative syndromes was performed based on analytic hierarchy process. Then “Hall for Workshop of Metasynthetic Engineering” expert symposium was held on subjects of syndrome quantification method and weight of evaluation indices in different levels for developing the analysis model of common syndromes. For clinical verification, the created models were applied to patients with osteoporosis for discriminating syndromes. Syndrome of each patient was also identified by 8 experts major in integrative medicine treating osteoporosis for comparing the coincidence rate using a self-made clinical questionnaire.RESULTS: Through literature reviewing, symptoms and signs quantification and expert discussing, the authors formed estimate models of essence deficit, qi deficiency, yin deficiency, yang deficiency, and blood stasis. A total of 220 patients with osteoporosis were enrolled and filled the clinical questionnaire. All 8 experts completed and returned the questionnaire (1 760 cases), and 1 545 of them were filled in completely. Experts’ opinion on syndrome differentiation was exactly coincidence to estimate model in 611 cases and almost coincidence in 639 cases. The total coincidence rate reached to 94.05%.CONCLUSION: The estimate model for syndrome differentiation of osteoporosis has a high-coincidence rate with the fuzzy evaluation from experts, with good rationality and feasibility, and is worthy of promotion in the clinical study.
Paclitaxel Release from Polyether-Anhydrides Prepared with UV-Curing Process
Anxin Dong,Tao Zhang
International Journal of Polymer Science , 2013, DOI: 10.1155/2013/916571
Abstract: Polyanhydrides have been used as drug delivery systems to achieve a long-term delivery due to its hydrophobicity and surface erosion degradation behavior. In order to develop a simple, economical, and rapid approach to synthesize polyanhydrides, we prepared a series of polyether-anhydride membranes composed of different mass fractions of sebacic acid, polyethylene glycol dimethacrylate, and poly(tetramethylene oxide) dimethacrylate by ultraviolet curing process. The chemical structure and thermal properties of target polyanhydrides were characterized, while the paclitaxel releases from the polymer matrix were evaluated by HPLC. The results demonstrated that the UV-curing process is a good method to synthesize the target polymers in a short time, and the paclitaxel release procedure can be controlled by changing the component in the copolymers. 1. Introduction A large number of degradable polymers have been introduced into drug delivery systems in recent years [1], and it was found that the degradation procedure could be classified as surface erosion and bulk erosions [2]. For those polymers degraded following the bulk erosion mechanism, for example, poly(lactic-glycolic acid) tends to present the nonlinear drug release and moisture-induced drug metamorphism [3]. While for those surface erosion polymers, for example, the polyanhydrides can achieve predictable near-zero order release [4–6]. Because of the special character, polyanhydrides have been explored widely for long-term release of drugs [7–9]. Polyanhydrides can be synthesized by various techniques, such as melt polycondensation, ring opening polymerization, and interfacial condensation [4, 10]. Under a high vacuum and high temperature condition, the high-molecular-weight polyanhydride can be achieved [11], but the reaction condition is difficult to implement and the molecular weight also badly depends on the purity quotients of the reactants [12]. On the other hand, light-initiated polymerization, widely known as UV-curing technique with remarkable advantages such as slow energy consuming, low solvent emission, high productivity, and excellent surface quality [13], has attracted much attention and is being widely applied in the preparations of various polymers, especially the crosslinked coating and adhesions, and so forth, even on the synthesis of polyanhydrides for bone augmentation applications, protein release, and DNA delivery [3, 14, 15]. One of the most typical UV curing techniques is the polymerization of the acrylate monomers. In this system, the reactive prepolymers, photo initiator,
Design and Fabrication of Low-Cost 1536-Chamber Microfluidic Microarrays for Mood-Disorders-Related Serological Studies
Xinyan Zhao,Tao Dong
Sensors , 2013, DOI: 10.3390/s131114570
Abstract: Mood disorders are common mental diseases, but physiological diagnostic methods are still lacking. Since much evidence has implied a relationship between mood disorders and the protein composition of blood sera, it is conceivable to develop a serological criterion for assisting diagnosis of mood disorders, based on a correlative database with enough capacity and high quality. In this pilot study, a low-cost microfluidic microarray device for quantifying at most 384 serological biomarkers at the same time was designed for the data acquisition of the serological study. The 1,536-chamber microfluidic device was modeled on a 1,536-well microtiter plate in order to employ a common microplate reader as the detection module for measuring the chemiluminescent immunoassay tests on the chips. The microfluidic microarrays were rapidly fabricated on polymethylmethacrylate slides using carbon dioxide laser ablation, followed by effective surface treatment processing. Sixteen types of different capture antibodies were immobilized on the chips to test the corresponding hormones and cytokines. The preliminary tests indicated that the signal-to-noise ratio and the limit of detection of microfluidic microarrays have reached the level of standard ELISA tests, whereas the operation time of microfluidic microarrays was sharply reduced.
A Microfluidic Device for Continuous Sensing of Systemic Acute Toxicants in Drinking Water
Xinyan Zhao,Tao Dong
International Journal of Environmental Research and Public Health , 2013, DOI: 10.3390/ijerph10126748
Abstract: A bioluminescent-cell-based microfluidic device for sensing toxicants in drinking water was designed and fabricated. The system employed Vibrio fischeri cells as broad-spectrum sensors to monitor potential systemic cell toxicants in water, such as heavy metal ions and phenol. Specifically, the chip was designed for continuous detection. The chip design included two counter-flow micromixers, a T-junction droplet generator and six spiral microchannels. The cell suspension and water sample were introduced into the micromixers and dispersed into droplets in the air flow. This guaranteed sufficient oxygen supply for the cell sensors. Copper (Cu 2+), zinc (Zn 2+), potassium dichromate and 3,5-dichlorophenol were selected as typical toxicants to validate the sensing system. Preliminary tests verified that the system was an effective screening tool for acute toxicants although it could not recognize or quantify specific toxicants. A distinct non-linear relationship was observed between the zinc ion concentration and the Relative Luminescence Units (RLU) obtained during testing. Thus, the concentration of simple toxic chemicals in water can be roughly estimated by this system. The proposed device shows great promise for an early warning system for water safety.
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