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Search Results: 1 - 10 of 29716 matches for " Hui Xiong "
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Era of diagnostic and interventional ultrasound
Hui-Xiong Xu
World Journal of Radiology , 2011, DOI: 10.4329/wjr.v3.i5.141
Abstract: It is an era of diagnostic and interventional ultrasound (US). Various new techniques such as three-dimensional US (3D US), interventional US, and contrast-enhanced US (CEUS) have been introduced into clinical practice. Dr. Xu and his colleagues have taken advantage of these techniques and carried out a series of relevant studies. Their use of 3D US in the liver, gallbladder, liver tumor volumetry, guidance for ablation, and 3D CEUS has widened the application of 3D US in the clinic. They found that prognosis in patients with hepatocellular carcinoma (HCC) after thermal ablation with curative intent was determined by treatment response to ablation, pretreatment serum AFP, and liver function reserve. Tumor response to treatment was the most predictive factor for long-term survival. They compared the use of percutaneous microwave ablation and radiofrequency ablation for the treatment of HCC and found that both are effective methods in treating HCCs. The local tumor control, complications related to treatment, and long-term survival were equivalent for the two modalities. They first compared the enhancement patterns of HCC and intrahepatic cholangiocarcinoma (ICC) and proposed the diagnostic clues for ICC, liver angiomyolipoma (AML), gallbladder cancer, renal carcinoma, and renal AML, which have greatly enhanced the role of CEUS in the clinic. They also evaluated the diagnostic performance of CEUS in characterizing complex cystic focal liver lesions and the agreement between two investigators with different experience levels; and found that CEUS is especially useful for the young investigator. They assessed the effect of anti-angiogenic gene therapy for HCC treated by microbubble-enhanced US exposure and concluded that gene therapy mediated by US exposure enhanced by a microbubble contrast agent may become a new treatment option for HCC.
Contrast-enhanced ultrasound: The evolving applications
Hui-Xiong Xu
World Journal of Radiology , 2009,
Abstract: Contrast-enhanced ultrasound (CEUS) is a major breakthrough for ultrasound imaging in recent years. By using a microbubble contrast agent and contrast-specific imaging software, CEUS is able to depict the micro- and macro-circulation of the targeted organ, which in turn leads to improved performance in diagnosis. Due to the special dual blood supply system in the liver, CEUS is particularly suitable for liver imaging. It is evident that CEUS facilitates improvement for characterization of focal liver lesions (FLLs), detection of liver malignancy, guidance for interventional procedures, and evaluation of treatment response after local therapies. CEUS has been demonstrated to be equal to contrast-enhanced computed tomography or magnetic resonance imaging for the characterization of FLLs. In addition, the applicability of CEUS has expanded to non-liver structures such as gallbladder, bile duct, pancreas, kidney, spleen, breast, thyroid, and prostate. The usefulness of CEUS in these applications is confirmed by extensive literature production. Novel applications include detecting bleeding sites and hematomas in patients with abdominal trauma, guiding percutaneous injection therapy and therefore achieving the goal of using interventional ultrasonography in managing splenic trauma, assessing the activity of Crohn’s disease, and detecting suspected endoleaks after endovascular abdominal aneurysm repair. Contrast-enhanced intraoperative ultrasound (US) and intracavitary use of CEUS have been developed and clinically studied. The potential use of CEUS involves sentinel lymph node detection, drug or gene delivery, and molecular imaging. In conclusion, the advent of CEUS has greatly enhanced the usefulness of US and even changed the status of US in clinical practice. The application of CEUS in the clinic is continuously evolving and it is expected that its use will be expanded further in the future.
Contrast-enhanced ultrasound in the biliary system: Potential uses and indications
Hui-Xiong Xu
World Journal of Radiology , 2009,
Abstract: Conventional ultrasound (US) is the first-line imaging investigation for biliary diseases. However, it is lack of the ability to depict the microcirculation of some lesions which may lead to failure in diagnosis for some biliary diseases. The use of contrast-enhanced US (CEUS) has reached the field of bile duct disease in recent years and promising results have been achieved. In this review, the methodology, image interpretation, enhancement pattern, clinical usefulness, and indications for CEUS in the biliary system are summarized. CEUS may be indicated in the biliary system under the following circumstances: (1) Where there is a need to make a characterization of intrahepatic cholangiocarcinoma (ICC); (2) For differentiation diagnosis between ICC and other tumors (i.e. hepatocellular carcinoma or liver metastasis) or infectious diseases; (3) For differentiation diagnosis between biliary cystadenoma and biliary cystadenocarcinoma; (4) To detect malignant change in Caroli’s disease; (5) To depict the extent of Klatskin’s tumor with greater clarity; (6) To make a distinction between gallbladder cholesterol polyp, adenoma and polypoid cancer; (7) To make a distinction between chronic cholecystitis with thickened wall and gallbladder cancer; (8) For differentiation diagnosis between motionless sludge and gallbladder cancer; (9) For differentiation diagnosis between common bile duct cancer and sludge or stone without acoustic shadowing; and (10) In patients who are suspected of having a drop of their percutaneous transhepatic cholangiodrainage tube, US contrast agent can be administered to through the tube detect the site of the tube.
Exploration on Virtual Human Resource Management
Hui Xiong,Jiawen Huang
International Journal of Business and Management , 2009,
Abstract: This paper gives a new concept and understanding to the virtual human resource management, analysis its theoretical basis preliminarily, and compares with the traditional human resource management model for the pros, finally summarizes the form and content thoroughly.
Hypersurfaces with constant anisotropic mean curvatures
Hui Ma,Changwei Xiong
Mathematics , 2013,
Abstract: We apply the evolution method to present a new proof of the Alexandrov type theorem for constant anisotropic mean curvature hypersurfaces in the Euclidean space $\mathbb{R}^{n+1}$.
Branching Process based Cascading Failure Probability Analysis for a Regional Power Grid in China with Utility Outage Data  [PDF]
Hui Ren, Ji Xiong, David Watts, Yibo Zhao
Energy and Power Engineering (EPE) , 2013, DOI: 10.4236/epe.2013.54B175
Abstract:

Studying the propagation of cascading failures through the transmission network is key to asses and mitigate the risk faced the energy system. As complex systems the power grid failure is often studied using some probability distributions. We apply 4 well-known probabilistic models, Poisson model, Power Law model, Generalized Poisson Branching process model and Borel-Tanner Branching process model, to a 14-year utility historical outage data from a regional power grid in China, computing probabilities of cascading line outages. For this data, the empirical distribution of the total number of line outages is well approximated by the initial line outages propagating according to a Borel-Tanner branching process. Also for this data, Power law model overestimates, while Generalized Possion branching process and Possion model underestimate, the probability of larger outages. Especially, the probability distribution generated by the Poisson model deviates heavily from the observed data, underestimating the probability of large events (total no. of outages over 5) by roughly a factor of 10-2 to 10-5. The observation is confirmed by a statistical test of model fitness. The results of this work indicate that further testing of Borel-Tanner branching process models of cascading failure is appropriate, and should be further discussed as it outperforms other more traditional models.

Midline Prostatic Cysts Presenting with Chronic Prostatitis or Secondary Infertility and Minimally Invasive Treatment: Endoscopic or Laparoscopic Approach?  [PDF]
Hui-hui Zhang, Fan Qi, Jun Wang, Min-feng Chen, Zhuo Li, Xiong-bing Zu
Surgical Science (SS) , 2011, DOI: 10.4236/ss.2011.25061
Abstract: Backgrounds: Surgical interventions especially minimally invasive treatments are recommended for symptomatic midline prostatic cysts. The endoscopic unroofing of cysts close to urethra is easy and simple, but it has little effect on the large cysts and cysts lying deeply, in contrast with the laparoscopic approach. Therefore, the selection of minimally invasive therapeutic approaches is important. The aim of this study is to describe our experience in the diagnosis and selection of minimally invasive treatment for midline prostatic cyst. Methods: 15 cases of midline prostatic cyst were studied.10 cases presented with prostatitis-like symptoms, 1 with dysuria and acute urinary retention, 3 with secondary infertility and the rest 1 with hemospermia. 6 patients presented with small cysts (≤2 cm × 2 cm) close to urethra and underwent transurethral unroofing. The other 9 patients with large cysts (>2 cm × 2 cm) or cysts lying closely behind the prostate received the laparoscopic excision. Results: The average duration of transurethral unroofing and laparoscopic excision was 39 mins and 118 mins respectively, whereas the average time of hospitalization was 2.7 days and 4.5 days respectively. After a follow-up of 21 months, all cases were treated successfully without complications and recurrence. Their prostatitis-like symptoms disappeared, and the three patients presented with secondary infertility achieved conception within one year after the operation. Conclusions: A midline prostatic cyst can present with chronic prostatitis-like symptoms and secondary infertility. It can be cured by minimally invasive treatments, but these procedures should be carefully selected according to the size and location of the cyst.
Economy and Humanity: Fundamental Theoretical Analyses of the Scientific View of Development
经济与人本:关于科学发展观的两个基础理论分析

CHEN Hui-xiong,
陈惠雄

浙江大学学报(人文社会科学版) , 2005,
Abstract: The scientific view of development (SVD) put forward by Chinese economists refers to a theory of planned and coordinated socio-economic development with the fundamental value-the needs of both rural and urban populations - as its prerequisite. The SVD features humanistic ideas and harmonious development.Involving humanity and economy, which are different yet interrelated, the SVD in nature addresses the value and status of humans, the subject of economic and social development. Based on this theme, this article demonstrates the fundamental theoretical value contained in the humanity-oriented economic theories, through an analysis of the philosophical contents of humanistic thoughts and historical context that gave birth to the said economic theories. A comprehensive understanding of the SVD will lead one to take humans not only as the ultimate objective of, but as the basic instrument of, economic development. Following this, the article focuses on the theoretical elucidation on the two core propositions regarding the ultimate objective and the ultimate instrument. The first proposition concerns the value criterion that the ultimate objective of economic development is rather the happiness of human beings than material satisfaction or a preference for its effectiveness. The article comes to revealing that happiness is the one and the only rational ultimate objective of economic development, thereby justifying the scientific value of the SVD by expounding the theoretical mechanism of the proposed criterion, analyzing human behavior under the influence of materialism, and complementing the modern theories of utilitarianism.The second proposition concerns viewpoints from what is known as the TOC (theory of constraints) that the ultimate fetters of economic development lie in neither natural resources nor money capital, but in human capital itself. Through an in-depth analysis of the scarcity theory of economics, the article argues that the scarcity of economic resources is fundamentally caused by the scarcity of human resources, thereby establishing the theory of relative scarcity and the scarcity of human capital. The views abstracted from the said objective and instrument of economic activities which are used to explain the development with life phenomenon of human beings provide two basic theoretical frames for the full establishment of the SVD.Finally, by relating theses theoretical analyses to the realistic development, the article holds that the importance of theoretical debates lie ultimately in the provision of guidance for the SVD.
Detecting Blackholes and Volcanoes in Directed Networks
Zhongmou Li,Hui Xiong,Yanchi Liu
Computer Science , 2010,
Abstract: In this paper, we formulate a novel problem for finding blackhole and volcano patterns in a large directed graph. Specifically, a blackhole pattern is a group which is made of a set of nodes in a way such that there are only inlinks to this group from the rest nodes in the graph. In contrast, a volcano pattern is a group which only has outlinks to the rest nodes in the graph. Both patterns can be observed in real world. For instance, in a trading network, a blackhole pattern may represent a group of traders who are manipulating the market. In the paper, we first prove that the blackhole mining problem is a dual problem of finding volcanoes. Therefore, we focus on finding the blackhole patterns. Along this line, we design two pruning schemes to guide the blackhole finding process. In the first pruning scheme, we strategically prune the search space based on a set of pattern-size-independent pruning rules and develop an iBlackhole algorithm. The second pruning scheme follows a divide-and-conquer strategy to further exploit the pruning results from the first pruning scheme. Indeed, a target directed graphs can be divided into several disconnected subgraphs by the first pruning scheme, and thus the blackhole finding can be conducted in each disconnected subgraph rather than in a large graph. Based on these two pruning schemes, we also develop an iBlackhole-DC algorithm. Finally, experimental results on real-world data show that the iBlackhole-DC algorithm can be several orders of magnitude faster than the iBlackhole algorithm, which has a huge computational advantage over a brute-force method.
Influences of protein to energy ratios in breakfast on mood, alertness and attention in the healthy undergraduate students  [PDF]
Yao-Chi Zeng, Shun-Min Li, Guo-Liang Xiong, Hui-Min Su, Jian-Cheng Wan
Health (Health) , 2011, DOI: 10.4236/health.2011.36065
Abstract: Background: The high protein (HP) breakfast reduced gastric emptying and the most satiat-ing macronutrient appears to be dietary protein. Few studies have investigated the effects of protein to energy ratio in breakfast on mood, alertness and attention. Objective: This study was designed to investigate whether the HP breakfast is more beneficial to mood, alertness and attention of the healthy undergraduate student than adequate-protein (AP) breakfast through the rising body temperature and re-maining stable blood glucose or through other physiologic processes. Methods: Thirteen healthy male undergraduate students (18 - 23 y) were studied in a double-blind, randomized crossover design. Blood samples, body tem-perature, satiety, mood and Continuous Per-formance Test (CPT) were assessed after the consumption of two isocaloric breakfasts that differed in their protein and carbohydrate con-tent: an HP breakfast (50%, 30%, and 20% of energy from protein, carbohydrate, and fat, re-spectively) or an AP breakfast (10%, 70%, and 20% of energy from protein, carbohydrate, and fat, respectively). Results: Consumption of an HP breakfast resulted in more steady glucose and insulin than AP breakfast consumption (p < 0.05). Satiety scores and body temperature were higher after HP breakfast consumption (p < 0.05). And most important, the positive mood and CPT scores were higher after HP breakfast than after AP breakfast intake (p < 0.05). Conclusion: HP breakfast can effectively stabilize postprandial serum glucose concentration and elevate post-prandial temperature of healthy male under-graduate students. Our present findings dem-onstrate the relationship between HP breakfast and mood, alertness and attention. This study indicated that HP breakfast may enhance human performance probably by increasing the thermic effect of a food and elevating body temperature.
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