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Search Results: 1 - 10 of 162926 matches for " WANG Chang-lin "
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Influence of different training patterns on the biomechanical performance of the terminal region of the Achilles tendon in rabbits
Zhen-hai GUO,Chang-lin HUANG,Wang GAO
Medical Journal of Chinese People's Liberation Army , 2012,
Abstract: Objective To investigate the effects of the different training patterns on the biomechanical performance of the terminal region of the Achilles tendon for providing a scientific basis for improving the ability of anti-stress and preventing injury in military physical training. Methods Fifty Japanese white rabbits were randomly assigned to four groups: control (n=5), running (running training on the running table, n=15), jump (jump training by electric shock, n=15), and cycle training (run and jump cycle, n=15). The animals in the control group were sacrificed at the start of the experiment. For the other training groups, three rabbits were sacrificed randomly in the second, third, fourth, sixth, and eighth week, respectively. The terminal regions of the Achilles tendons in both sides were identified to determine the biomechanics. Results At the sixth week, the limit stress and the elastic modulus reached the highest in the running group, and then reduced with the increase in training time. Meanwhile, in the jump group, the limit stress and elastic modulus reached the peak at the fourth week, and then decreased gradually. In the eighth week, no significant difference was observed when the groups were compared with the control group. In the cycle group, the limit stress and elastic modulus increased gradually with the increase in training time, reaching the peak value in the eighth week, and no decline was recorded during the training period. Conclusions Running training can slowly improve the biomechanical performance of the tissues in the terminal region of the Achilles tendon, whereas jump training can rapidly increase it, although long-term excessive training will reduce the anti-injury ability. Meanwhile, cycle training can improve the biomechanical performance of the tissues in the terminal region of the Achilles tendon, enabling it to withstand more stress and thus its anti-injury ability is enhanced.
Mechanism of A375 cell apoptosis induced by 2-chlorodeoxyadenosine(2-CDA)
Chang-lin WANG,Ming ZHAO,Jian MA,Qi ZHANG
Medical Journal of Chinese People's Liberation Army , 2011,
Abstract: Objective The effect of nucleoside analogue,2-chlorodeoxyadenosine(2-CDA) on human malignant melanoma has not been fully studied heretofore.The aim of present study was to investigate the mechanisms of apoptosis of human melanoma A375 cells induced by 2-chlorodeoxyadenosine(2-CDA).Methods A375 cells were treated with different doses(0,0.5,1,2,5μmol/L) of 2-CDA for different duration.The inhibitory effect on cell proliferation was measured by MTT assay.The cell apoptosis was detected by flow cytometry after annexin V-FITC/PI double staining.The expressions of p-Stat3,t-Stat3,Caspase-3,PARP and β-actin proteins were determined by Western blot.Results 2-CDA inhibited the proliferation of A375 cells in a time-and dose-dependent manner.After treatment for 48h,the IC50 of 2-CDA was 3.04μmol/L.Results of annexin V-FITC/PI double staining and flow cytometry indicated that 2-CDA effectively induced A375 apoptosis in a dose-dependent manner.The apoptotic rate of A375 cells was increased from 1.01% to 32.0% after treatment with 5μmol/L 2-CDA for 48h.The results of Western blotting showed that 2-CDA decreased the phosphorylation level of Stat3 kinase in time-and dose-dependent manner.When the cells treated with 5μmol/L 2-CDA for 36h,there was a prominent inhibitory effect on Stat3 kinase,indicated by a sharp decline of its phosphorylation level.At the same time,both the Caspase-3 and its client PARP,a hallmark of apoptosis,were all cleaved,implying that the cell apoptosis was induced in a caspase-dependent pathway.Conclusion 2-CDA may inhibit proliferation and induce apoptosis in human melanoma A375 cells by blocking the activity of Stat3 kinase and activating the Caspase-3/PARP apoptosis pathway.
Epidemiological sampling survey on military training-related injuries in PLA during 2009 and 2010
Chang-lin HUANG,Qian-jin WANG,Jing WANG,Guang-chao ZHANG
Medical Journal of Chinese People's Liberation Army , 2012,
Abstract: To conduct a random sampling survey in occurrence and distribution of military training-related injuries in the troops as the monitoring sites of the injury in the years of 2009 and 2010 for analyzing the epidemiological features and trend of the injury. Methods Ten troops as the monitoring site were randomly selected for the survey, and soldiers who participated in military training in the years 2009 and 2010 served as the objects of the survey. Data concerning military training-related injuries were collected and analyzed according to the "Diagnostic Criteria and Treatment Principle on Military Training-Related Injury". Results Among the 63132 soldiers who participated in various military trainings, 10775 suffered from military training-related injuries in 2009 and 2010. Among which, 4076 out of the 27230 soldiers who participated in military training in 2009 suffered from training-related injury, with an incidence of 15%; while 6699 out of the 35902 soldiers who participated in military training in 2010 suffered the injury, with an incidence of 18.7%. There was a significantly higher incidence of military training-related injuries in 2010 (P<0.01). The composition ratios of osteoarticular, soft tissue, and organ injuries were 33.5%, 48.4%, and 18.1% in 2009, and 19.7%, 73.3%, and 7% in 2010, respectively. The composition ratio of organ and osteoarticular injury decreased, while that of soft tissue injuries increased significantly. Two peaks of training injuries were seen both in 2009 and 2010. Conclusions More attention should be paid to the prevention of injuries related to military training. The key to reducing the incidence of military training-related injuries is to enhance the dissemination of information about military training-related injuries and strictly carry out the "Rule for Health Protection in Military Training".
Study on the annual balance application of nitrogen fertilizer in the system of wheat relay intercropped with corn and peanut
小麦套作玉米花生种植制氮肥周年平衡施用研究

KOU Chang-Lin,WANG Yong-,Qi,
寇长林
,王永歧

中国生态农业学报 , 2002,
Abstract: 运用双佳值法对砂质潮土小麦套作玉米和花生种植制N肥周年施用量及作物之间分配比例研究结果表明,该种植制周年N肥最佳施用量为311.1kg/hm^2,3种作物间适宜分配比例为33.7:35.1:31.2,即单位自然面积各作物施N量分别为小麦104.8kg/hm^2、玉米27.3kg/hm^2、花生72.8kg/hm^2,单位自然面积周年施肥量为204.9kg/hm^2。该施肥用量比单作常规周年施肥量减少29.9%,但小麦、玉米、花生及总产量分别增产9.3%、3.7%、4.8%和6.3%。
Automatic Target Detection and Discrimination in SAR Imagery
SAR图像中目标的自动检测与辨别

ZHONG Xue-lian,WANG Chang-lin,ZHONG Xue-lian,WANG Chang-lin,ZHONG Xue-lian,WANG Chang-lin,ZHONG Xue-lian,WANG Chang-lin,
钟雪莲
,王长林,周平,张新征

中国图象图形学报 , 2005,
Abstract: Automatic Target Recognition in SAR imagery becomes popular in recent years. The typical Automatic Target Recognition system consists of three stages: detection, discrimination and classification. Detection, whose role is to find regions in SAR imagery that contains potential targets, will inevitably produce false alarms. The false alarms are then further reduced by the following stage, discrimination. These two stages together are called prescreening, which are very important in the whole ATR system. If they act highly efficient, i.e., they can reject almost all the background clutter, the computational cost in the process of classification will be greatly reduced. At present, there are three methods in the field of automatic target detection: CFAR, multi-resolution model, detection methods based on image phases. There are also quite a few methods for target discrimination. In this paper we present an overview on the algorithms and their results for automatic target detection and discrimination in SAR imagery. The research trends of these fields are also given at the end of the paper.
Effect of cyclic training model on terminal structure of rabbit Achilles tendon: an experimental study
Chang-lin HUANG,Wang GAO,Tao HUANG,Zhen-hai GUO
Medical Journal of Chinese People's Liberation Army , 2012,
Abstract: Objective  To observe the effect of cyclic training on histomorphology of the terminal structure of rabbit Achilles tendon, and explore its preventive effect on training-based enthesiopathy. Methods  Seventy-two Japanese white rabbits were randomly assigned to four groups: control group, jumping group, running group and cyclic training group, 18 for each. Three rabbits of each group were sacrificed at the 2nd, 3rd, 4th, 6th, 8th and 10th week. The terminal insertion tissues of bilateral Achilles tendons were harvested from these rabbits for observing the pathomorphological changes under light microscope, and pathological scoring and statistical analysis were carried out. Results  Light microscopy showed that the tendon fibers and fibrocartilage in the Achilles tendon insertion region were severely damaged in the jumping group, and though the tendon fibers were damaged severely, the injury to the fibrocartilage was comparatively less serious in the running group. The injuries to the tendon fibers and fibrocartilage were milder in the cyclic training group than in the jumping group and running group. In the 2nd, 3rd, 4th, 6th and 8th week, the histopathology score of insertion of Achilles tendon was 1.17±0.12, 2.19±0.15, 3.23±0.20, 4.66±0.16, 4.71±0.18, 4.63±0.13 respectively in the jumping group, and 1.16±0.13, 1.15±0.14, 2.18±0.12, 2.99±0.15, 3.98±0.16, 4.01±0.12 respectively in the running group. Increase in pathological score appeared earlier in the jumping group than in the running group, and a significant increase began at the 3rd week. The difference in pathological score between the two groups originated mainly from the changes in the tidemark. In the 2nd, 3rd, 4th, 6th, 8th and 10th week, the pathological score of Achilles tendon insertion was 1.13±0.14, 1.16±0.17, 1.15±0.13, 2.18±0.13, 2.17±0.12, 2.92±0.11 respectively in the cyclic training group, and they showed no significant changes as compared with control group at the early stage, but there was an increase at the late stage of the training (6 weeks later), however the score values were lower than those in the jumping group and running group. These changes in score were originated mainly from pathological changes in the paratenon and tidemark. Conclusions  Jumping training could lead to severe injury to the fiber tissue and fibrocartilage, while running training might result in severe injury to Achilles tendon insertion structure and lighter injury to the fibrocartilage part. Cyclic training model provides suffcient time for repair and reconstruction of Achilles tendon insertion structure,
Nonlinear Liouville problems in a quarter plane
Chang-Lin Xiang
Mathematics , 2015,
Abstract: We answer affirmatively the open problem proposed by Cabr\'e and Tan in their paper "Positive solutions of nonlinear problems involving the square root of the Laplacian" (see Adv. Math. {\bf 224} (2010), no. 5, 2052-2093).
Gradient Estimates for Solutions To Quasilinear Elliptic Equations with Critical Sobolev Growth and Hardy Potential
Chang-Lin Xiang
Mathematics , 2015,
Abstract: This note is a continuation of the work \cite{CaoXiangYan2014}. We study the following quasilinear elliptic equations \[ -\Delta_{p}u-\frac{\mu}{|x|^{p}}|u|^{p-2}u=Q(x)|u|^{\frac{Np}{N-p}-2}u,\quad\, x\in\mathbb{R}^{N}, \] where $1
Asymptotic Behaviors of Solutions to quasilinear elliptic Equations with critical Sobolev growth and Hardy potential
Chang-Lin Xiang
Mathematics , 2015, DOI: 10.1016/j.jde.2015.05.007
Abstract: Optimal estimates on the asymptotic behaviors of weak solutions both at the origin and at the infinity are obtained to the following quasilinear elliptic equations \[-\Delta_{p}u-\frac{\mu}{|x|^{p}}|u|^{p-2}u=Q(x)|u|^{\frac{Np}{N-p}-2}u,\quad\,x\in \mathbb{R}^{N},\] where $1
Remarks on Nondegeneracy of Ground States for Quasilinear Schr?dinger Equations
Chang-Lin Xiang
Mathematics , 2015,
Abstract: In this paper, we answer affirmatively the problem proposed by A. Selvitella in his paper "Nondegenracy of the ground state for quasilinear Schr\"odinger Equations" (see Calc. Var. Partial Differ. Equ., {\bf 53} (2015), pp 349-364): every ground state of equation \begin{eqnarray*}-\Delta u-u\Delta |u|^2+\omega u-|u|^{p-1}u=0&&\text{in }\mathbb{R}^N\end{eqnarray*} is nondegenerate for $10$ is a given constant and $N\ge1$. We also derive further properties on the linear operator associated to ground states of above equation.
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