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Study on the Supporting Force of Water Spider and its Experimental Model on Water Surface
Wang Qingcheng,Yang Xiaodong,Mao Ning 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.12
Accuracy of designing and producing a micro-force measuring device is 0.1μN, through the device, the maximum supporting force of 5 living water spiders sample were measured, the maximum supporting force of living water striders is 24.8 times its weight. Water spider has large supporting force on water surface, super-hydrophobic structures of water spider legs play important role. designing and producing 5 water strider models, whose legs were made of aluminum wire with 0.45mm diameter, super-hydrophobic processing to surfaces of aluminum wire, its contact angle is 154.5°, experimentally measured that the maximum supporting force of 5 water spider models. Through mechanical analysis, established supporting force mathematical model of the water spider model on water surface, according to the model calculated the maximum supporting force of water spider model. Compare errors between measured values and calculated values of supporting forces, the ratio of the error value is less than 8.39%, verified the correctness the mathematical model of supporting force .
Diagnostic Value of Superoxide Dismutase in Tuberculous and Malignant Pleural Effusions
Wang, Xin-Feng,Wu, Yan-Hua,Jiao, Jin,Guan, Cui-Ping,Yang, Xiao-Guang,Wang, Mao-Shui Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.2
The aim of this study was to investigate the diagnostic value of superoxide dismutase (SOD) in tuberculous pleural effusions (TPEs) and malignant pleural effusions (MPEs). Pleural effusion (PE) samples from 100 patients were classified on the basis of diagnosis as TPE (n=57) and MPE (n=43). The activity of SOD was determined by pyrolgallol assay. A significant difference was observed in SOD activity (P<0.01) between TPE and MPE, levels of being significantly higher in TPE compared to MPE. With a threshold value of 41 U/L, the area under the ROC curve was 0.653, SOD had a sensitivity of 61.4% and a specificity of 61.0% for differential diagnosis. Thus, SOD activity in PE was not a good biomarker in differentiating TPE and MPE. To the best of our knowledge, five SOD isoforms may be present in PE. Identification of which SOD contributes to the difference of SOD level between TPE and MPE is very important for illustrating mechanisms and improving the differential diagnostic value.
Cytogenetical Identification in Seven Species of Elytrigia Desv.
Mao Peisheng,Wang Xinguo,Huang Ying,Meng Lin,Mao Peichun 한국초지조사료학회 2009 한국초지조사료학회 학술대회논문집 Vol.2009 No.08
The ploid level of 46 germplasms of Elytrigia Desv. were observed and determined with the microscope, which are from 21 countries and areas that United States of America offered. The results showed these accessions were grouped into three distinct ploid levels including diploidy, tetraploidy and hexaploidy in E. intermedia, E. repens, E. elongata, E. pontica, E. caespitosa, E. juncea, E. alatavica. There were 24 diploid accessions, 1 tetraploidy and 1 hexaploidy in E. intermedia; 4 diploid accessions and 3 tetraploidy in E. repens, 6 texaploidy and 1 hexaploidy in E. elongata, 1 diploidy and 2 tetraploidy in E. pontica, all of E. caespitosa, E. juncea and E. alatavica were diploidy.
Wang, Ju-Bo,Dong, Dan-Feng,Wang, Mao-De,Gao, Ke Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.1
Isocitrate dehydrogenase (IDH) is of great importance in cell metabolism and energy conversion. IDH mutation in glioma cells is reported to be associated with an increased overall survival. However, effects biological behavior of therapy of gliomas are unclear. Here, we investigated the influence of wild-type and mutated IDH genes on glioma cell biological behavior and response to chemotherapy. Relevant mechanisms were further explored. We designed our study on the background of the IDHR132H mutation. Stable cell lines were constructed by transfection. The CCK-8 method was used to assess cell proliferation, flow cytometry for the cell cycle and cell apoptosis, and the transwell method for cell invasion. Nude mouse models were employed to determine tumorigenesis and sensitivity to chemotherapy. Western blotting was used to detect relevant protein expression levels. We found that overexpression of wild IDH1 gene did not cause changes in the cell cycle, apoptosis and invasion ability. However, it resulted in chemotherapy resistance to a high dose of temozolomide (TMZ) in vivo and in vitro. The IDH1 mutation caused cell cycle arrest in G1 stage and a reduction of proliferation and invasion ability, while raising sensitivity to chemotherapy. This may provide an explanation for the better prognosis of IDH1 mutated glioma patients and the relative worse prognosis of their wild-type IDH1 counterparts. We also expect IDH1 mutations may be optimized as new targets to improve the prognosis of glioma patients.
Expression of HMGB1 and its Clinical Significance in T-cell Lymphoma
Mao, Xing-Jiang,Wang, Geng-Fu,Chen, Zhi-Jun,Wang, Li-Na,Zhang, Jun-Biao,Wang, Hui-Ling Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.11
Objectives: To evaluate the clinical significance of HMGB1 expression in T-cell lymphoma. Methods: Immunohistochemical staining for HMGB1 and survivin was performed with specimens from 120 cases of T-cell lymphoma and 40 cases of reactive lymphoid hyperplasia with antibodies against human HMGB1 and survivin. Results: The expression of HMGB1 and survivin was significantly higher in tissues of T-cell lymphoma than in reactive lymphoid hyperplasia. Positive expression of HMGB1 and survivin was observed in 63.7% (65/102) and 61.8% (63/102) of T-cell lymphoma cases, respectively. While was associated with gender, age, and tumor location, significant correlations with malignancy and clinical stage were observed. Spearman rank correlation analysis revealed that the expression of HMGB1 and survivin was positively correlated in T-cell lymphomas (P<0.01). Conclusions: Expression of HMGB1 and survivin in T-cell lymphomas is significantly associated with malignancy and clinical stage, but not with gender, age and tumor location. Elevated expression of HMGB1 may be an important biomarker for the development and progression of T-cell lymphoma.
Research and Development of Ethernet Communication System in Numerical Control Workshop
Wang Qingcheng,Cao Guohua,Mao Ning 보안공학연구지원센터 2014 International Journal of Future Generation Communi Vol.7 No.6
There are 10 sets of CNC equipment in a numerical controlled workshop, and set up the CAD/CAPP/CAM center, there is a problem that each production unit is an information island, which can not implement informatization management. This paper takes ZNE-100TL module realized the embedded Ethernet and RS-232C data transfer function as the hardware platform, takes VC++ as software platform, applied Ethernet technology to realize communication the CNC equipment with CAD/CAPP/CAM center. This is good for production management and data transmission in numerical controlled workshop, which can improve the production efficiency.
An Optimized Third Harmonic Injection Method for Three-Phase Cascaded H-Bridge Photovoltaic Inverter
Wang Mao,Xing Zhang,Tao Zhao,Yuhua Hu,Fusheng Wang,Zhiqiang Dai,Renxian Cao 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
The uneven irradiation and temperature in photovoltaic (PV) modules of three-phase cascaded H-bridge (CHB) inverters will cause the unbalanced output power between solar panels, resulting in unbalanced grid current between three phases. In addition, since each phase can be regarded as a single-phase inverter, the second harmonic voltage pulsation of dc-side capacitors is a problem to be solved. To solve these two problems, a third harmonic injection optimization method on the basis of fundamental frequency zero sequence is proposed in this paper. The third harmonic with the same amplitude of fundamental modulated wave signal is injected into the modulated wave signal when the amplitude of synthesized wave signal is no greater than unity. Otherwise, the amplitude of third harmonic is decreased correspondingly to ensure the amplitude of synthesized wave signal being unity. With this method, the dc-side voltage pulsation is effectively restrained and the power balancing limit of CHB inverter is expanded. The feasibility and effectiveness of this method are verified by an experimental prototype of a three-phase seven-level CHB inverter.
Banknote Image Defect Recognition Method Based on Convolution Neural Network
Wang Ke,Wang Huiqin,Shu Yue,Mao Li,Qiu Fengyan 보안공학연구지원센터 2016 International Journal of Security and Its Applicat Vol.10 No.6
There are shortcomings in the currently used traditional CCD imaging system which can automatically recognize banknote image defect, such as the need to manually extract the defect characteristics and low accuracy rate of detection results. This paper briefly introduced the advantage of convolution Neural Network (CNN) in image classification and designed a image defect identification method based on convolutional neural network (CNN). The experimental results on data sets show that the identification accuracy rate of this method is 95.6%, which is significantly better than traditional identification method.
Patterning of CVD Diamond Films For MEMS Application
Wang, Xiaodong,Yang, Yirong,Ren, Congxin,Mao, Minyao,Wang, Weiyuan The Korean Vacuum Society 1998 Applied Science and Convergence Technology Vol.7 No.1
To apply diamond films in microelectromechanical systems(MEMS), it is necessary to develop the patterning technologies of diamond films in the micrometer scale. In this paper, three different kinds of technologies for patterning CVD diamond films carried out by us were demonstrated: selective growth by improved diamond nucleation in DC bias-enhanced microwave plasma chemical vapor deposition (MPCVD) system, selective growth of seeding using diamond-particle-mixed photoresist, and selective etching of oxygen ion beam using Al as the mask. It was show that high selectivity and precise patterns had been achieved, and all the processes were compatible with IC process.