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Search Results: 1 - 10 of 23956 matches for " Sheng Tong "
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Analysis of Influencing Factors on Survival Time of Patients with Heart Failure  [PDF]
Jianwei Sheng, Xiyuan Qian, Tong Ruan
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.84042
Abstract: To explore the influencing factors of survival time of patients with heart failure, a total of 1789 patients with heart failure were collected from Shanghai Shuguang Hospital. The Cox proportional hazards model and the mixed effects Cox model were used to analyze the factors on survival time of patients. The results of Cox proportional hazards model showed that age (RR = 1.32), hypertension (RR = 0.67), ARB (RR = 0.55), diuretic (RR = 1.48) and antiplatelet (RR = 0.53) have significant impacts on the survival time of patients. The results of mixed effects Cox model showed that age (RR = 1.16), hypertension (RR = 0.61), lung infection (RR = 1.43), ARB (RR = 0.64), β-blockers (RR = 0.77) and antiplatelet (RR = 0.69) have a significant impact on the survival time of patients. The results are consistent with the covariates age, hypertension, ARB and antiplatelet but inconsistent with the covariates lung infection and β-blockers.
Inhomogeneous material property assignment and orientation definition of transverse isotropy of femur  [PDF]
Hai-Sheng Yang, Tong-Tong Guo, Jian-Huang Wu, Xin Ma
Journal of Biomedical Science and Engineering (JBiSE) , 2009, DOI: 10.4236/jbise.2009.26060
Abstract: The finite element method has been increasingly adopted to study the biomechanical behavior of biologic structures. Once the finite element mesh has been generated from CT data set, the assignment of bone tissue’s material properties to each element is a fundamental step in the generation of individualized or subject-specific finite element models. The aim of this work is to simulate the inhomogeneous and anisotropic material properties of femur using the finite element method. A program is developed to read a CT data set as well as the finite element mesh generated from it, and to assign to each element of the mesh the material properties derived from the bone tissue density at the element location. Moreover, for cancellous bone in femoral neck and cortical bone in femoral stem, the principal orientations of transverse isotropy were defined based on the tra-becular structures and the haversian system respectively.
MRI Finding in Delayed Extensive Brain Lesions after Radiation Therapy :Cortical Laminar Necrosis and White Matter Myelinolysis  [PDF]
Zhou Ye-Ting, Guang-Sheng Wang, Xiao-Dong Chen, Dao-Ming Tong
Advances in Molecular Imaging (AMI) , 2012, DOI: 10.4236/ami.2012.21001
Abstract: The focal and diffuse cerebral white matter injury can be caused by treatment with radiation therapy for cranial tumors. However, the literature rarely describes a MRI finding in radiation-induced delayed extensive cerebral injury. Our objective was to report a rare case who had a delayed extensive hyperintensity injury in brain on MRI after radiation therapy due to nasopharyngeal cancer. A MRI was performed on a 40-year-old patient with extensive brain damage who had the radiation therapy two years ago.MRI finding was evaluated. On MRI, T2-weighted MRI showed an extensive hyperintensity after treated by irradiation. The radiographic pattern of extensive cerebral injury is relatively distinct. It involves the white matter and gray matter in cerebral, cerebellum, medulla oblongata, pons, internal capsule and thalamus bilaterally. Our observations demonstrate that the extensive hyperintensity lesions in brain on MRI after radiation therapy is a cortical laminar necrosis and white matter myelinolysis.
The current situation and prospect of the study on industrial ecology
工业生态学研究现状与展望

LI Tong-Sheng,
李同升

生态学报 , 2005,
Abstract: Industrial ecology is a new cross-discipline that has developed fast in both theory and practice in the past few decades. After a brief introduction to the origin of the discipline, it was comprehensively stated that the researches on material and energy flows (industrial metabolism), material reduction, technology innovation, life-cycle analysis and assessment, environment beneficial design (eco-design), producer's extended responsibility (product stewardship), eco-industrial parks (industrial symbiosis), product-oriented environmental policy and ecological benefit evaluation. In addition, the related theoretical approach focusing on material and energy flows and the eco-industry practice centered on eco-industrial park at home are analyzed. Then, a perspective in industrial ecology is made as follows: the international research of the industrial ecology has entered a new era, namely, theory and technology are going in the direction of being systemized, the content particularized and detailed, the applicability and popularity attended. Compared with those in the developed countries, the content, technology and practice at home are rather limited both in depth and width, characterized by following-up and shortage of breakthroughs. At the end, based on the international development and our development at home, a research framework that includes theory, policy and application is given, and major research fields and contents are put forward.
Adaptive Fuzzy Observer Backstepping Control for a Class of Uncertain Nonlinear Systems with Unknown Time-delay

Shao-Cheng Tong Ning Sheng,

国际自动化与计算杂志 , 2010,
Abstract: In this paper, a new adaptive fuzzy backstepping control approach is developed for a class of nonlinear systems with unknown time-delay and unmeasured states. Using fuzzy logic systems to approximate the unknown nonlinear functions, a fuzzy state observer is designed for estimating the unmeasured states. On the basis of the state observer and applying the backstepping technique, an adaptive fuzzy observer control approach is developed. The main features of the proposed adaptive fuzzy control approach not only guarantees that all the signals of the closed-loop system are semiglobally uniformly ultimately bounded, but also contain less adaptation parameters to be updated on-line. Finally, simulation results are provided to show the effectiveness of the proposed approach.
A New Monte Carlo Algorithm for Free Energy Calculation
Sheng Bi,Ning-Hua Tong
Physics , 2014, DOI: 10.1103/PhysRevE.92.013310
Abstract: We propose a new Monte Carlo algorithm for the free energy calculation based on configuration space sampling. We implement this algorithm for Ising model. Comparison with the exact free energy shows an excellent agreement. We analyse the properties of this algorithm and compares it with Wang-Landau algorithm which samples in energy space. This method is applicable to classical statistical models. The possibility of extending it to quantum systems is discussed.
Assembly of Covalently Inorganic-Organic Hybrid Molecular Framework Based on Porphyrin and Phthalocyanine Derivatives—Sensitizer for Dye Sensitized Solar Cells  [PDF]
Hui Lin, Yahong Wu, Shanling Tong, Sheng Hu, Hengde Li, Chuanyi Pan, Yan Yan
Open Journal of Inorganic Chemistry (OJIC) , 2018, DOI: 10.4236/ojic.2018.81001
Abstract: The research on sensitizer for dye sensitized solar cells based on (metallo)porphyrin/phthalocyanine materials were reviewed, and experimental design and assembly method were advised. Latest progress and research status of sensitizer dyes based on metalloporphyrins applied in dye sensitized solar cells was summarized. The preparation and construction of sensitizer electrodes and dye sensitized solar cells based on metal organic frameworks (MOFs) of (metallo)porphyrin/phthalocyanine were projected.
Preparation of Single Substituted Phenyl Porphyrins Form Meso-Tetraphenyl Porphyrin-Synthetic Example from Symmetric Porphyrin into Asymmetric Porphyrins  [PDF]
Hui Lin, Xiaoting Chen, Yahong Wu, Shanling Tong, Sheng Hu, Jian Yu, Yan Yan
Open Journal of Inorganic Chemistry (OJIC) , 2018, DOI: 10.4236/ojic.2018.81002
Abstract: Two asymmetric porphyrins, 5-(4-chloromethylphenyl)-10, 15, 20-triphenyl porphyrin and 5-(4-formylphenyl)-10, 15, 20-triphenyl porphyrin, were successfully prepared by the symmetric meso-tetraphenyl porphyrin and relative molecular configurations and properties were characterized by spectral determinations. This work presented an example for synthesis of asymmetric porphyrin derivatives from the symmetric porphyrin. Both asymmetric porphyrins are reactive in molecular assembly, the concerned reactions including alkylation with Grignard reagents, etherification with alcohols, aldol condensation and Mannich reaction for modification and enhancing their functionality. In this work, the reaction conditions were improved, synthetic strategy and route were confirmed.
Energy Structure of Two-Dimensional Graphene-Semiconductor Quantum Dot  [PDF]
Jin Tong Wang, Guang-Lin Zhao, Diola Bagayoko, Dong-Sheng Guo, Jincan Chen, Zhiwei Sun
World Journal of Condensed Matter Physics (WJCMP) , 2013, DOI: 10.4236/wjcmp.2013.33023
Abstract:

Graphene is a newly discovered material that possesses unique electronic properties. It is a two-dimensional singlelayered sheet in which the electrons are free and quasi-relativistic. These properties may open a door for many new electronic applications. In this paper we proposed a flat 2-dimensional circular graphene-semiconductor quantum dot. We have carried out theoretical studies including deriving the Dirac equation for the electrons inside the graphene-semiconductor quantum dot and solving the equation. We have established the energy structure as a function of the rotational quantum number and the size (radius) of the dot. The energy gap between the energy levels can be tuned with the radius of the quantum dot. It could be useful for quantum computation and single electron device application.

Common Premotor Regions for the Perception and Production of Prosody and Correlations with Empathy and Prosodic Ability
Lisa Aziz-Zadeh,Tong Sheng,Anahita Gheytanchi
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0008759
Abstract: Prosody, the melody and intonation of speech, involves the rhythm, rate, pitch and voice quality to relay linguistic and emotional information from one individual to another. A significant component of human social communication depends upon interpreting and responding to another person's prosodic tone as well as one's own ability to produce prosodic speech. However there has been little work on whether the perception and production of prosody share common neural processes, and if so, how these might correlate with individual differences in social ability.
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