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Study on Evenness Control for Tensionof Rapier Loom by Neural Network
Zheng Laijiu,Du Bing Jin,Wei Li Fen 한국멀티미디어학회 2006 한국멀티미디어학회 국제학술대회 Vol.2006 No.-
This paper presents the use of neural network model (NNM) for air-jet loom's let-off process, which is used to model the uncertain parameters of this process. The adaptive model was used to estimate let-off tension recursively and is incorporated in predictive control strategies. Control tests showed excellent behavior following different set point and variations, such as diameter of weaver's beam, air stream, density of warp and weft, type of textile, etc. An optimum steady state scheme in keeping evenness of let-off tension of loom has been realized. After adopting the method, it improves production efficiency and product quality obviously, its flaw amount also falls 80%.
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Historical Long-term Exposure to Pentachlorophenol Causing Risk of Cancer - A Community Study
Zheng, Rui-Zhi,Zhang, Qing-He,He, Yi-Xin,Zhang, Qian,Yang, Lin-Shen,Zhang, Zhi-Hua,Zhang, Xiu-Jun,Hu, Jing-Ting,Huang, Fen Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.2
Background: Pervious studies suggested occupational workers exposure to pentachlorophenol (PCP) might contribute to increased risk of cancer. However, few studies have focused on associations between PCP and cancer risk at the community level. Objective: The present study was to explore the cancer risk for the community population living long-term in a PCP contaminated area. Methods: All the cancer cases diagnosed in 2009-2011 in Tongling City were collected. The cancer patients' residencies were geo-referenced in each district. The historical PCP usage for each district of Tongling was calculated as the PCP pollution index, which was further used to divide into PCP exposure categories. Standardized rate ratios (SRRs) of cancer incidence were applied to detect the cancer risk as exposure grade elevated. Correlation analysis was performed to analyze the relationship between PCP pollution and cancer incidence. Results: A total of 5,288 cancer cases (3,451 male and 1,837 female) were identified. PCP usage was correlated with the incidence of leukemia (r=0.88, P=0.002) for males, and with cancer of the esophagus for males (r=0.83, P=0.008) and females (r=0.71, P=0.020). Compared with the low exposure category, significant SRRs for total cancer sites was obtained for high PCP exposure category (SRR=1.61, 95%CI=1.59-1.62). Most SRR values of the cancer sites were significantly increased as exposure grade elevated and exposure time extended. Conclusion: The present study found that community residents living in the PCP contaminated area had increased risk of cancers. Leukemias, lymphomas and nasopharyngeal and esophageal cancers are most possibly associated with PCP exposure.
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Fen-Qiang Li,Juehao Ding,Miao Zheng,Jianlin Xu,Xiaohong Ge,Hui Li,Jun Zhao 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.7
A combination of multi-physics numerical simulation and experiment was conducted to study the magnetic pulse compaction technology driven by two aluminum tubes of tungsten copper powder. Then, the effects of different process parameters on the density and uniformity of the compact were studied by tuning the thickness of the pack and driver tubes and the gap between them. Results show that the density of compact is the highest when the thickness of the driver tube is 1.0 mm. More energy is consumed for force conduction as the thickness of the pack tube increases. Thus, the density of the compact is the highest when the thickness of the packer tube is 0.8 mm. The speed of the driver tube impacting the pack tube also increases with the rise in the gap. Accordingly, the compaction density with the gap of 1.5 mm is the highest under the same other parameters.
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H2S adsorption performance of alkali lignocarbon/PVA composite membrane
Youjing Li,Fen Li,Menglong Zheng,Hong Yan,Qianliang Liu 한국화학공학회 2022 Korean Journal of Chemical Engineering Vol.39 No.9
In this work, lignin carbon-based membranes were prepared for H2S adsorption. Alkali lignin was carbonizedto obtain alkali lignocarbon (CLA). Using the CLA and polyvinyl alcohol (PVA) as raw materials, glycerol andwater as plasticizers, and nano-CuO and Cu2+ as dopants, CLA/PVA, CuO-CLA/PVA-1, and Cu-CLA/PVA-2 compositemembranes were prepared by solution casting method. The structures of these membranes and their H2S adsorptionproperties were then analyzed. The results show that with a membrane solution water-alcohol ratio of 3 : 1 and2 wt% CLA content, the prepared CLA/PVA membrane can adsorb H2S for 30 min. The CuO-CLA/PVA-1 and Cu-CLA/PVA-2 membranes, which were obtained after doping with nano-CuO and Cu2+, demonstrate significantlyimproved deodorization performance compared with that of CLA/PVA. The Cu-CLA/PVA-2 membrane can adsorbH2S for up to 75min and also demonstrates better mechanical properties. The H2S adsorption capacity of this membraneis up to 0.27 mol/kg. Structural analysis shows that the veneers of the three composite membranes are smoothand that doped copper is evenly distributed in the membranes as nano-CuO. The surface functional groups of theCLA/PVA, CuO-CLA/PVA-1, and Cu-CLA/PVA-2 membranes are similar and play a positive role in H2S adsorption. Nano-CuO is the main active site for H2S adsorption in the Cu-containing composite membranes.
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Jun-Hui Zheng,Jian-Fen Liu 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.3
In this paper, a robust kalman filter is designed for the uncertainty time-varying discrete systems with state delay in process and output matrices combined with the possibility of missing measurements. The uncertainties are expected in the process, output and white noise covariance matrices. A formula for a candidate upper bound on the actual state estimation error variances for all admissible parameter uncertainties and possible missing measurements is obtained. The filter parameters are optimized to give a minimal upper bound on the state estimation error covariance for all admissible uncertainties and missing measurements.
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Yu Xiao,Fen Li,Anyuan Zheng,Qibing Chen,Fuhai Chen,Xiang Cheng,Zezhang Tao 한국식품영양과학회 2021 Journal of medicinal food Vol.24 No.8
Even though nasopharyngeal carcinoma (NPC) is not common worldwide, it is a major public health burden in endemic areas. Distant metastasis often leads to a poor prognosis for NPC; therefore, new and effective anticancer strategies are needed. Ginkgolic acid (GA) is small-molecule compound existing in Ginkgo biloba that has various biologically relevant activities, including antitumor properties; however, its effects and mechanism of action in NPC are unknown. The effects of GA on NPC and such underlying mechanisms were investigated using 5–8F and CNE2 cells and NP69 human immortalized nasopharyngeal epithelial cells in this study. Moreover, the xenograft models were built to examine GA's effection in vivo. GA treatment decreased the survival and invasive capacity of 5–8F and CNE2 and induced their apoptosis, which varied with dose; this was accompanied by downregulation of B cell lymphoma (Bcl)2, upregulation of Bcl2-associated X protein, and activation of poly-ADP ribose polymerase, and caspase-9/-3. G0/G1 phase arrest was induced by GA in NPCs. It also reduced the expression of cyclin-dependent kinase 6 and its regulators cyclin D2 and cyclin D3. GA inhibited the activation of protein kinase B/nuclear factor signaling; this effect was potentiated with GA and 5-fluorouracil (5-FU), which also enhanced 5-FU-induced apoptosis. In summary, GA may be effective as an adjuvant to conventional chemotherapy drugs in preventing the progression of NPC.
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