Prognostic Factors for Survival of Patients with Extensive Stage Small Cell Lung Cancer - a Retrospective Single Institution Analysis

Wu, Chao,Li, Fang,Jiao, Shun-Chang Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.10

The objective of this retrospective study was to investigate prognostic factors associated with survival of patients with extensive stage small cell lung cancer (ES-SCLC). Included were 200 patients admitted to the Liberation Army General Hospital with a diagnosis of ES-SCLC. The demographics of patients, disease characteristics, pre-treatment biochemical parameters and therapeutic plan were assessed or evaluated. Univariate analysis found that second-line chemotherapy, radiotherapy, and no liver metastasis were associated with improved survival. Tumor response to first-line chemotherapy and normal initial hemoglobin levels were also associated with a survival benefit (all P-values ${\leq}$ 0.0369). Multivariate Cox regression analysis indicated that liver metastasis and the total number of all chemotherapy cycles were independent prognostic factors of survival. The morbidity risk in patients with liver metastasis was 2.52-fold higher than that in patients without liver metastasis (hazard ratio (HR)=2.52 (1.69-3.76); P<0.0001). However, one unit increase in the total number of chemotherapy cycles decreased the risk of death by 0.86-fold (HR=0.86 (0.80-0.92); P<0.0001). Absence of liver metastasis and ability of a patient to receive and tolerate multiple lines of chemotherapy were associated with longer survival.

A Simple Reversible Watermarking Scheme Based on Difference Expansion

Chao-Ming Wu,Cheng-Kang Wu,Houshou Chen 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7

A simple reversible watermarking scheme based on block-wise difference expansion is proposed. Pixels in a block are expanded with respect to a common reference point. The maximum capacity will exceed 0.5 bpp if the block size is larger than 2. According to local variances of the reference points, blocks introducing small distortion by difference expanding are selected firstly to embed watermark. In Tian’s difference expansion algorithm, the embedding of the location map causes large overhead cost, apparently in low payload region. A good lossless compression algorithm is required to reduce this cost but the complexity is increased. In the proposed algorithm, a simple all 0 pattern is used to distinguish between non-expandable and expandable blocks. In this way, the location map is no longer necessary and the complexity of the scheme will be reduced.

Influence of Pinned Layer Coupling on Magnetization Switching of Magnetic Tunnel Junction

Chao-Hsien Huang,Yin-Hao Wu,Kuo-Ming Wu,Jong-Ching Wu,Lance Horng 한국자기학회 2008 한국자기학회 학술연구발표회 논문개요집 Vol.- No.-

Equalizing charger based on multi‑windings transformer and voltage‑doubler rectifiers

Chao Wu,Hong-kai Zhang,Shan-shou Li,Zheng-fei Li,Jia-rong Kan 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.2

Energy storage batteries are currently composed of a large number of low-voltage battery cells. The state of charge of the cells is different due to the characteristic differences between cells. This causes some of the cells to be over-charged during charging and some of the cells to be over-discharging during discharging. To improve this phenomenon, this paper proposes a battery charger with an equalizing function that works during the charging and discharging processes. A performance comparison among the proposed charger and other similar topologies is carried out. The operational principle of the proposed strategy is analyzed and a control strategy with only a single voltage loop is proposed, which can guarantee two-stage charging. Experimental results show that the proposed charger can simultaneously achieve a high efficiency and the requirement of voltage equalization between cells.

Monitoring Analysis and Numerical Simulation of the Land Subsidence in Linear Engineering Areas

Chao Jia,Xiao Yang,Jing Wu,Pengpeng Ding,Chao Bian 대한토목학회 2021 KSCE JOURNAL OF CIVIL ENGINEERING Vol.25 No.7

Non-uniform land subsidence can cause subgrade deformation and threaten the safety of linear projects such as high-speed railways. The Lunan high-speed railway is taken as the research background. Combined with the hydrogeological and engineering geological conditions, the regional land subsidence is analyzed by the combined method of the differential interferometric synthetic aperture radar (D-InSAR) and small baseline subset interferometric synthetic aperture radar (SBAS-InSAR), which is verified by using precise leveling and GPS monitoring data. The accurate land subsidence analysis of large-scale linear engineering is realized. The distribution situation and change laws of land subsidence in linear engineering areas are revealed. Then, a three-dimensional coupled numerical model of land subsidence along a large-scale linear project is established by using the finite difference method. The spatial distribution characteristics of land subsidence in the linear engineering area are quantitatively analyzed and predicted. The main factors affecting land subsidence and the degree of land subsidence are discussed while keeping the pumping rate constant. The results show that: 1) The combined method of D-InSAR and SBAS-InSAR has high accuracy in the land subsidence monitoring of linear engineering. 2) There are five non-uniform settlement funnels along the Lunan high-speed railway. The groundwater over-extraction and coal mining are the main reasons for the land subsidence. 3) Realizing water source conversion and reduce groundwater exploitation are the main factors in linear engineering areas as soon as possible.

Dynamic modeling method for active magnetic bearings-rotor system of steam turbines

Chao Wu,Zhenzhong Su,Dong Wang,Hao Jiang 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.4

As oil-free rotor support technology, active magnetic bearings (AMBs) are increasingly applied in turbinmachinery, including steam turbines. The compact multiple disksrotor bearing system of maglev steam turbines leads to complicated dynamic behaviors, which is the basis of AMBs controllers design. In this paper, an analytical modeling method is proposed to describe the dynamic characteristics of AMBs-rotor system of maglev steam turbines. The analytic rotor dynamic model consists of multiple rigid disks on a flexible shaft and AMBs. In modeling the rotor bearing system, the flexible shaft is discretized by Euler Bernoulli beam elements. The connection between rigid disks and flexible shaft is equivalent to spring dampers. Angular stiffness and angular damping coefficients are introduced to model the spring dampers and identified by 3D finite element simulation results. The bearings force takes the control system of AMBs into consideration. Moreover, experiments of a test rig are carried out. The results show that the proposed analytical rotor dynamic modeling method is effective.

Effect of Coagulating Agents on Lignin and Sugar Contents in Acid Prehydrolysis Liquor

Chao-Jun Wu,Dong-Mei Yu,Shu-Ping Li,Li-Juan Bing,Rui-Ping Tong 한국펄프·종이공학회 2016 한국펄프·종이공학회 학술발표논문집 Vol.2016 No.10

Partial Discharge Detection Method Based on DD-DT CWT and Singular Value Decomposition

Wu Chao,Gao Yiran,Wang Ruoyan,Wang Kai,Liu Siyang,Nie Yongjie,Wang Ping 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.4

Partial discharge (PD) detection is signifi cant for insulation condition evaluation of electrical equipment. However, it often happens that the PD signals are submerged by interferences, which will cause the inaccurate detection results. In this paper, we propose a PD detection method based on double-density dual-tree complex wavelet transform (DD-DT CWT) and singular value decomposition (SVD) to solve this problem. The denoising method based on DD-DT CWT has better performance in both removing interferences and retaining features of PD signals. The inner product of the singular value matrix obtained by applying SVD to denoised high-frequency wavelet coeffi cient matrix can concisely represent the complexity of the tested signal, which can be used as a basis to judge the existence of the PD signal. Besides, Otsu algorithm is introduced to calculate the threshold to locate the appearance time of the PD signal. Experimental results show that the proposed method can detect the PD signal with the accuracy rate of 77.8% when PD signals are submerged by noises, while the traditional method cannot detect the existence of the PD signal. In addition, only the method proposed in this paper can detect the appearance time of the PD signal with the accuracy rate of 97.2%.

Research on Incentive Mechanism of Employees in Internet Enterprises

Wu Chao,Li Xinlai 한중경제문화학회 2023 한중경제문화연구 Vol.24 No.-

The Internet, as one of the most rapidly developing industries in China in recent years, has made great contributions to China’s economic development. Internet enterprises are both an important pillar of China’s current economic development, but also a great source of scientific and technological development and innovation. For Internet companies, the core of enterprise development people-oriented, talent is the foundation of enterprise development, enterprise development cannot be separated from the team, team building cannot be separated from the talent, in the final analysis, talent is the core of enterprise development. Therefore, enterprises want to develop, we must retain talent, enterprises want to retain talent, we must incentivize the enterprise staff. Incentives are vital in human resources management, and every enterprise should design a mechanism that suits its specific circumstances. The mechanism should motivate staff to make better contributions to the enterprise, thus promoting its growth and development. This paper reviews relevant domestic and foreign literature, as well as the results of a questionnaire survey of Internet enterprise employees, to study the employee incentive mechanism in Internet enterprises. The paper puts forward measures to existing problems to facilitate the better development of Internet enterprises.

A Study on Improve Share Image of Visual Cryptography

Chao-Ming Wu,Wen-Jan Chen,Yu-Yen Shen 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7

The visual cryptography is a method of encrypt secret image in to two or several share images and use the mankind's visual scheme to decipher. The sizes of the two share images produced by our method will be different. So, the transmission bandwidth and storage space needed are less than the traditional visual cryptography system. In addition the security of the data is increased.