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Search Results: 1 - 10 of 58938 matches for " YaKun Yang "
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Arthroscopy Assisted Lesion Clearance and Bone Graft, Titanium Rod Support Treatment of Early Stage Osteonecrosis of the Femoral Head of the Postoperative Survival Rate Analysis  [PDF]
Xingming Yang, Wei Shi, Yakun Du, Lei Zhang
Surgical Science (SS) , 2017, DOI: 10.4236/ss.2017.81005
Abstract: Objective: To assess the curative effect of the stage II femoral head necrosis treated by arthroscopy assisted lesion clearance, bone graft and titanium rod support. Methods: All the patients (including 58 patients 74 hips) were diagnosed as stage II femoral head necrosis according to the ARCO staging system during 2003-2013. In these patients, 15 hips were stage IIA, 34 hips were stage IIB and 25 hips were stage IIC. Located by C-arm and assisted by arthroscopy, minimally-invasive percutaneous pulp core decompression and lesion clearance within the femoral head were accurately performed, and then, the OAM composite of autologous bone marrow was implanted and the femoral head was supported using the titanium rod. Follow-up including the pain score, the Harris hip score and X-ray observation for disease progression were achieved at 6, 12, 24 and 36 months postoperatively, Kaplan-Meier survival curve was used for the survival analysis. Result: The VAS score and the Harris score after operation were better THRAn THRAt of before the surgery, the difference had statistical significance (p < 0.05). As for the X-ray staging, 5 cases (5 hips) progressed from stage IIB to stage IIC, the femoral head of 6 cases (6 hips) staged IIC collapsed at 24 months after the operation and then underwent THRA after 30 months. In this study, the total improvement rate after the surgery was 79.72% (93.33% for IIA, 82.35% for IIB and 68% for IIC). The total survival rate of these patients was 64.2% (95% CI, 64.2% - 90.1%). Conclusion: Arthroscopy assisted lesion clearance, bone graft and titanium rod support to treat the stage II osteonecrosis of the femoral head are effective and can prevent the femoral head from collapsing. But for stage IIC patients who had a history of the use of hormone, this surgery should be chosen carefully because the outcome is always very poor.
Study on dynamic angle of repose for submarine pipeline with spoiler on sandy seabed
Lipeng Yang,Bing Shi,Yakun Guo
Journal of Petroleum Exploration and Production Technologies , 2012, DOI: 10.1007/s13202-012-0037-7
Abstract: This paper investigates the dynamic angle of repose underneath the submarine pipeline. A series of tests are carried out to explore the bottom velocity in the scour hole for the case of with spoiler, and gap-ratio in unidirectional current. On that basis, the formulas of dynamic angle of repose in the scour hole are proposed using a sand deposition model. The formulas consider the bottom velocity (which is mainly influenced by the spoiler height and gap-ratio) that dominates the angle of repose. The calculation results are verified by the test data and a good agreement is obtained.
The Comparison of the Manifestation of the Clinical Imageology and Pathology between the Brucellar Spondylitis and the Spine Turberculosis  [PDF]
Xinming Yang, Xianyong Meng, Wei Shi, Yakun Du, Lei Zhang, Yaoyi Wang
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.52014
Abstract:


Objective: To improve the clinical differential diagnosis level, the clinical manifestation of the brucellar spondylitis and the spine turberculosis were discussed in this paper. Method: The study was completed in the No. 1 Affiliated Hospital of Hebei North University in Zhangjiakou City, Hebei Province, China, from January 2001 to December 2013 by Analyzing the X-ray, CT scanning and MRI of 257 cases of the brucellar spondylitis retrospectively and comparing with the clinical imageology and pathology 332 cases of turberculosis of the spine diagnosed finally. Results: The brucellar spondylitis: The focuses usually locate in the lumbar vertebra and L4, 5 has the highest occurrence rate. The focuses are often small but multiple, and limited to the edge of the vertebra. Hyperostosis and osteoscterosis are usually found in the tissuses around the focuses. There are often new focuses in the newborn bones, and the destruction of intervertebral discs is usually slight. Hyperostosis and osteoscterosis might be found in the surfaces of the joints. The densites of the bones close to the focuses become high. There were less or no paravertebral abscesses but inflammational granuloma can be found frequently. Turberculosis of the spine: The focuses are usually located in the thoracic and lumbar vertebra, and are characterized by the destruction of the vertebra and the intervertebral discs, accompanied by the appearance of

An Algorithm for Mining of Association Rules for the Information Communication Network Alarms Based on Swarm Intelligence
Yang Wang,Guocai Li,Yakun Xu,Jie Hu
Mathematical Problems in Engineering , 2014, DOI: 10.1155/2014/894205
Abstract: Due to the centralized management of information communication network, the network operator have to face these pressures, which come from the increasing network alarms and maintenance efficiency. The effective analysis on mining of the network alarm association rules is achieved by incorporating classic data association mining algorithm and swarm intelligence optimization algorithm. From the related concept of the information communication network, the paper analyzes the data characteristics and association logic of the network alarms. Besides, the alarm data are preprocessed and the main standardization information fields are screened. The APPSO algorithm is proposed on the basis of combining the evaluation method for support and confidence coefficient in the Apriori (AP) algorithm as well as the particle swarm optimization (PSO) algorithm. By establishing a sparse linked list, the algorithm is able to calculate the particle support thus further improving the performance of the APPSO algorithm. Based on the test for the network alarm data, it is discovered that rational setting of the particle swarm scale and number of iterations of the APPSO algorithm can be used to mine the vast majority and even all of the association rules and the mining efficiency is significantly improved, compared with Apriori algorithm. 1. Introduction The operation and maintenance management of information communication network mainly refers to timely discovery, locating and handling of any network fault to ensure smooth and efficient operation as well as guarantee in major emergencies pertinent to network operation, complaints about network quality from customers, assessment and analysis of network quality, prediction of planning, construction, and so forth. The time consumed during fault location and judgment in the application layer of a large-scale network accounts for 93% of its total time for failure of recovery [1]. The huge network structure and multifunctional device types also bring about large amounts of alarm data due to such characteristics of the information communication network as topological structure densification, network device microminiaturization, communication board precision, and so forth. Therefore, the foundation of the network operation and maintenance is the effective management of the network alarms. As an important supporting means for network operation and maintenance management, network management system directly influences the quality of service which the information communication network provides to its customers [2]. The network management
On Kakeya-Nikodym type maximal inequalities
Yakun Xi
Mathematics , 2015,
Abstract: We show that for any dimension $d\ge3$, one can obtain Wolff's $L^{(d+2)/2}$ bound on Kakeya-Nikodym maximal function in $\mathbb R^d$ for $d\ge3$ without the induction on scales argument. The key ingredient is to reduce to a 2-dimensional $L^2$ estimate with an auxiliary maximal function. We also prove that the same $L^{(d+2)/2}$ bound holds for Nikodym maximal function for any manifold $(M^d,g)$ with constant curvature, which generalizes Sogge's results for $d=3$ to any $d\ge3$. As in the 3-dimensional case, we can handle manifolds of constant curvature due to the fact that, in this case, two intersecting geodesics uniquely determine a 2-dimensional totally geodesic submanifold, which allows the use of the auxiliary maximal function.
Scour Development Around Submarine Pipelines due to Current Based on the Maximum Entropy Theory Scour Development Around Submarine Pipelines due to Current Based on the Maximum Entropy Theory
ZHANG Jing,SHI Bing,GUO Yakun,XU Weilin,YANG Kejun,ZHAO Enjin
- , 2016,
Abstract: This paper presents the results from laboratory experiments and theoretical analysis to investigate the development of scour around submarine pipeline under steady current conditions. Experiments show that the scour process takes place in two stages: the initial rapid scour and the subsequent gradual scour development stage. An empirical formula for calculating the equilibrium scour depth(the maximum scour depth) is developed by using the regression method. This formula together with the maximum entropy theory can be applied to establish a formula to predict the scour process for given water depth, diameter of pipeline and flow velocity. Good agreement between the predicted and measured scour depth is obtained
A Review of Mindfulness Improves Decision Making and Future Prospects  [PDF]
Si Liu, Yaozhong Liu, Yakun Ni
Psychology (PSYCH) , 2018, DOI: 10.4236/psych.2018.92015
Abstract: With the popularity of mindfulness training among different groups of people, more and more attention has been paid to the positive role of mindfulness. In particular, the improvement of mindfulness on decision-making has been respected by the elite management and practitioners in different industries. There are also different forms of experimental paradigms for different types of decision-making behaviors in research methods. Both behavioral evidence and imaging evidence show that mindfulness training can improve decision-making, both under the social and non-social conditions. Mindfulness training was predominantly driven by an “emotional” system, manifested by an active medial prefrontal cortex, whereas the latter was not dominated by a “rational” system of decision-making processes; on the contrary, posterior insular and thalamic regions with emotional function were more active. Therefore, the emotional system throughout the mindset training affects the whole process of decision-making. In addition, mindfulness affects other possible factors such as attention, compassion, and cognitive control in the decision-making process. At last, based on the existing research deficiencies, this paper analyzed future prospects from the aspects of research methods, research contents and theoretical construction, in order to provide references for future research in this field.
Self-Affirmation through WeChat Moments  [PDF]
Xiangli Wen, Yaozhong Liu, Yakun Ni
Psychology (PSYCH) , 2019, DOI: 10.4236/psych.2019.103026
Abstract: Self-affirmation is helpful for reducing the individual’s defensive response to threats, harvesting and growing from threatening but valuable information. This study examines whether viewing personal WeChat moments is self-affirmative. Browsing WeChat moments of other people that better than yourself will lead to an upward social comparison, but the effect of browsing your own moments is rarely discussed. This study conducts an experiment, and the result proves that browsing WeChat moments is an effective self-affirmation intervention paradigm. The self-affirmation paradigm which is close to daily life deserves further promotion and research.
Does the Dirac Cone Exist in Silicene on Metal Substrates?
Ruge Quhe,Yakun Yuan,Jiaxin Zheng,Yangyang Wang,Zeyuan Ni,Junjie Shi,Dapeng Yu,Jinbo Yang,Jing Lu
Physics , 2014,
Abstract: Absence of the Dirac cone due to a strong band hybridization is revealed to be a common feature for epitaxial silicene on metal substrates according to our first-principles calculations for silicene on Ir, Cu, Mg, Au, Pt, Al, and Ag substrates. The destroyed Dirac cone of silicene, however, can be effectively restored with linear or parabolic dispersion by intercalating alkali metal atoms between silicene and the metal substrates, offering an opportunity to study the intriguing properties of silicene without further transfer of silicene from the metal substrates.
On Budget Management Strategy for IT Enterprises in Economic Crisis ----A Case Study of Sohu.com
Yakun Wang,Haoyuan Liu
International Business Research , 2009, DOI: 10.5539/ibr.v2n3p72
Abstract: On the second half of the year 2008, a serious economic crisis caused by US sub-prime mortgage crisis covers the world financial market. This crisis strikes heavily on the financial system and impacts on other industry. The crisis advances higher requirements for governments’ macro adjustment and policy supervision. Besides, it requires more for enterprises’ financial budget and management. A series problems turn into demanding challenges for enterprises budgeting and controlling under the crisis. By taking the famous Internet enterprise Sohu.com as an example, this paper probes into the financial budget management and controlling strategy of IT enterprises in economic crisis.
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