Nonlinear-Dynamic-Analysis Based Fuzzy PID Control Approach for Complex Hydraulic Driving Process

Zheng-Qiang Zhu,Xin-Jiang Lu,Jie Lei,Ming-Hui Huang 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.7

The strong nonlinearity of the hydraulic driving process for forging makes it difficult to achieve accurate control. In this paper, we propose a nonlinear-dynamic-analysis based Fuzzy PID control approach for this complex process. Unlike the existing control methods that are designed specifically for a given work piece, this proposed control method can be effectively used in the forging of different work pieces. A model of the closed-loop forging system is first derived and a solving method is then developed in order to find the model solution. Using this model solution, the dynamics of the closed-loop forging system is further estimated and the conditions for stability, vibration, and creep, as well as the relationships between the controller parameters and the constraints are also derived. These derived dynamic characteristics, conditions and relationships for different work pieces are further integrated and used to design the controller. Through the use of experiments and simulations on a practical forging system, the effectiveness of all of these analytical results and the designed controller is finally demonstrated.

Optimistic Fault Diagnosis in Discrete Event Systems by Labeled Petri Nets and Basis Markings

Guanghui Zhu,Jiafeng Zhang,Zhong Zheng,Shan Luan,Te Chen,Qiang Ma,Zhiwu Li 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.6

This paper deals with the fault diagnosis problem of discrete event systems modeled with labeled Petri nets. Its main contributions are threefold. First, depending on whether a diagnosis function examines the fault transitions that possibly occur after the last observed event, we formally divide the diagnosis functions into two types: optimistic and pessimistic, which aims to facilitate the exploration of different diagnosis approaches. Second, a framework is proposed, which extends a given diagnosis approach for Petri nets to the case of labeled Petri nets. The main idea of the framework is to compute and combine the diagnosis results of observable transition sequences corresponding to an observed word. Third, we convert a basis-marking-based approach that is originally pessimistic to the optimistic case and prove the correctness of this conversion.

The Design of Malocclusion Model Diagnosis and Treatment Planning CAD System

Hong, Zhao,qiang, Zhai Zhan,Zheng, Wang Yu,Yie, Ke,Zhu, Lin 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1

Malocclusion model diagnosis and treatment is an important branch of stomatology. It means that dental diseases is treated through diagnosis and correction of dental deformity disease. In this paper, the objective, content, and method of malocclusion model diagnosis and treatment planning CAD system are introduced. Using the system, dentists are able to capture the image of dental cast, measure three dimensional feature points, extract specialized feature data, express teeth and gum with certain data structure, then provide the basis for design of treatment scheme. According to the feature points the feature data, computer aided design and simulation can be performed. The working efficiency and treatment effectivity of dentists can be improved in consequence.

The Design of Malocclusion Model Diagnosis and Treatment Planning CAD System

Zhao Hong,Zhai Zhan Qiang,Wang Yu Zheng,Ke Yie,Lin Zhu 대한전자공학회 1992 대한전자공학회 Conference Vol.1992 No.2

Clinical Study of Thalidomide Combined with Dexamethasone for the Treatment of Elderly Patients with Newly Diagnosed Multiple Myeloma

Chen, Hai-Fei,Li, Zheng-Yang,Tang, Jie-Qing,Shen, Hong-Shi,Cui, Qing-Ya,Ren, Yong-Ya,Qin, Long-Mei,Jin, Ling-Juan,Zhu, Jing-Jing,Wang, Jing,Ding, Jie,Wang, Ke-Yuan,Yu, Zi-Qiang,Wang, Zhao-Yue,Wu, Tian Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.9

Objective: To investigate the relationship between the efficacy and safety of different doses of thalidomide (Thal) plus dexamethasone (Dex) as the initial therapy in elderly patients with newly diagnosed multiple myeloma (MM). Methods: Clinical data of 28 elderly patients with newly diagnosed MM who underwent the TD regimen as the initial therapy were analyzed retrospectively. The patients were divided into two groups according to the maximal sustained dose of Thal: lower dose (group A) and higher dose (group B). The overall response rate (ORR), progression free survival (PFS), overall survival (OS), and adverse events (AES) were compared between the two groups. Results: A total of 28 patients were followed up with a median of 18 months. The ORR was 60.1%. The median response time and PFS were 2.0 and 17.0 months, respectively. The mean sustained dose of Thal in group B was significantly higher than group A (292.9 mg v 180.4 mg, P=0.01). There was no significantly difference in ORR (57.1% v 64.3%, P=1.00) and PFS (9.63months v 17.66 months, P=0.73) between groups A and B. During the follow up, only five patients died (<40%) and, therefore, median OS values were not available. It is estimated, however, that the mean survival time in the two groups was 35.6 and 33.4 months (P>0.05), respectively. All of the patients tolerated the treatment well. The incidence of AES in patients with a grading above 3 in group B was significantly higher than in group A (P=0.033). Conclusions: The TD regimen results in a high response rate and manageable AES as the initial therapy in elderly patients with MM. TD should be considered as the front line regimen for the treatment of elderly patients with MM in areas with financial constraints. The clinical response can be achieved at a low dose Thal with minimal toxicity.

Light scattering enhanced photoanodes for dye-sensitized solar cells prepared by carbon spheres/TiO_2 nanoparticle composites

Guangtao Yang,Jing Zhang,Peiqing Wang,Qiang Sun,Jun Zheng,Yuejin Zhu 한국물리학회 2011 Current Applied Physics Vol.11 No.3

Incorporating scattering centers in the nanocrystalline photoanode or additional scattering layers on the nanocrystalline photoanode is an effective way to enhance the light harvest efficiency (LHE) of the photoanode and the performance of dye-sensitized solar cells (DSSCs). In this work, mesoporous photoanodes were fabricated based on the composites of anatase TiO_2 nanoparticles and carbon spheres. The holes were left after calcination thus serving as the light scattering centers in the photoanode. The size and the amounts of the holes were adjusted by changing the size (250, 500 and 700 nm) and concentration (5, 10, 15 and 20 wt% of the TiO_2 nanocrystallines) of the carbon spheres in the slurry. The light scattering ability and the dye adsorption of the photoanodes with holes of varied size and contents were investigated. The holes left by calcinating the carbon spheres increased the light scattering of the photoanode. However, the increased light scattering ability offset the dye adsorption ability of the photoanode by high amounts of carbon spheres modification. The performances of the DSSCs are investigated under the simulated sunlight and the incident light (400―780 nm). The DSSC with photoanode made from the slurry with 500 nm and 15 wt% carbon spheres exhibited the opitimized performance (Jsc = 14.8 mA cm^-2, Voc = 0.657 V, FF = 0.703 and η = 7.2%), much better than the DSSCs with photoanode made by the pure TiO_2 nanocrystalline (Jsc = 11.7 mA cm^-2, Voc = 0.645V, FF = 0.699 and η = 5.55%) and other photoanodes, indicating it best balanced the controversy of the enhanced light scattering ability and the decreased dye adsorption. The incident-photo-to-electric conversion efficiency test indicated the highest LHE of the 500 nm and 15 wt% carbon spheres modified photoanode.

rs10505474 and rs7837328 at 8q24 Cumulatively Confer Risk of Prostate Cancer in Northern Han Chinese

Zhang, Lin-Lin,Sun, Liang,Zhu, Xiao-Quan,Xu, Yong,Yang, Kuo,Yang, Fan,Yang, Yi-Ge,Chen, Guo-Qiang,Fu, Ji-Cheng,Zheng, Chen-Guang,Li, Ying,Mu, Xiao-Qiu,Shi, Xiao-Hong,Zhao, Fan,Wang, Fei,Yang, Ze,Wang, Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.7

Aims: Genome-wide association studies (GWAS) have identified several risk variants for prostate cancer (pCa) mainly in Europeans, which need to be further verified in other racial groups. We selected six previously identified variants as candidates and to define the association with PCa in Northern Han Chinese. Methods: 749 subjects from Beijing and Tianjin in Northern China were included. Six variants (rs10505474, rs7837328, rs4242384, rs7813, rs486907 and rs1058205) were genotyped by high resolution melting (HRM) assays. The individual and cumulative contribution for of the risk of PCa and clinical covariates were analyzed. Results: Among the six candidate variants, onlyrs10505474, and rs7837328, both locating at 8q24 region, were associated with PCa in our population.rs10505474 (A) was associated with PCa ($OR_{recessive}=1.56$, p=0.006); and rs7837328 (A) was associated with PCa ($OR_{dominant}=1.38$, p=0.042/$OR_{recessive}=1.99$, p=0.003). Moreover, we observed a cumulative effects between them ($p_{trend}=2.58{\times}10^{-5}$). The joint population attributable risk showed the two variants might account for 71.85% of PCa risk. In addition, we found the homozygotes of rs10505474 (A) and rs7837328 (A) were associated with PCa clinical covariants (age at onset, tumor stage, respectively) ($p_{age}=0.046$, $P_{tumorstage}=0.048$). Conclusion: rs10505474 (A) and rs7387328 (A) at 8q24 are associated with PCa and cumulatively confer risk, suggesting the two variations could determine susceptibility to PCa in the Northern Chinese Han population.

Bacillus ferrooxidans sp. nov., an iron(II)-oxidizing bacterium isolated from paddy soil

Guo-Wei Zhou,Xiao-Ru Yang,Jian-Qiang Su,Bang-Xiao Zheng,Yong-Guan Zhu 한국미생물학회 2018 The journal of microbiology Vol.56 No.7

An endospore-forming bacterium, designated YT-3T, was isolated from a paddy soil in Yingtan, Jiangxi, China. Cells of strain YT-3T were Gram-positive, rod-shaped, facultative anaerobic, catalase, and oxidase positive. The optimum growth temperature and pH were 30°C (ranged from 15 to 50°C) and 6.5–7.0 (ranged from 3 to 11), respectively. Analysis of the 16S rRNA gene sequence showed that strain YT-3T was affiliated to the genus Bacillus and displayed the highest similarity to that of Bacillus drentensis JCM 21707T (98.3%), followed by B. ginsengisoli JCM 17335T (97.8%) and B. fumarioli JCM 21708T (97.0%). The similarity of rpoB gene sequence between strain YT-3T and B. drentensis JCM 21707T, B. ginsengisoli JCM 17335T and B. fumarioli JCM 21708T was 80.4%, 81.5%, and 82.1%, respectively. The genomic DNA G + C content was 44.9 mol%. The predominant respiratory quinone was Menaquinone-7, and meso-diaminopimelic acid was present in the peptidoglycan layer of cell wall. The major fatty acids were C15:0 anteiso (36.2%), C14:0 iso (19.6%), C15:0 iso (17.4%), and C16:0 iso (9.8%). The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phospholipids, and ammoniac phospholipids. The DNA-DNA hybridization values between isolate YT-3T and B. drentensis (JCM 21707T), B. ginsengisoli (JCM 17335T), and B. fumarioli (JCM 21708T) were 36.3%, 30.3%, and 25.3%, respectively. On the basis of physiological, genetic and biochemical data, strain YT-3T represented a novel species of the genus Bacillus, for which the name Bacillus ferrooxidans sp. nov was proposed. The type strain is YT-3T (= KCTC 33875T = CCTCC AB 2017049T).

Enhancing Performances of Polyamide 66 Short Fiber/Natural Rubber Composites via In Situ Vulcanization Reaction

Zhi Hao,Junqi Shen,Xiang Sheng,Zong Shen,Le Yang,Xuefeng Lu,Zhu Luo,Qiang Zheng 한국섬유공학회 2020 Fibers and polymers Vol.21 No.2

This paper details a new method for improving the interfacial bonding between PA66 short fiber (PSF) and natural rubber (NR) by reaction of the methacrylic acid (MAA)-grafting-modified PSF with rubber during vulcanization. Carboncarbon double bonds introduced to the SF surface by MAA grafting were opened, and a vulcanization reaction occurred between the modified PSF and rubber in the presence of sulfur. The chemical reactions were verified by FTIR and XPS. The processing rheological behaviors of the compounded composites were investigated by a rubber processing analyzer (RPA). The morphology of modified PSF was characterized by AFM and SEM. The improved interfacial bonding was confirmed by DMA, which enhanced deformational stress at definite elongation of the NR/PSF composites. The volume concentration of the MAA solution for grafting on the SF surface had a great influence on the interfacial bonding and mechanical properties of the composites; when the volume concentration was 30 %, the modified PSF-reinforced NR/CB had the best interfacial bonding and mechanical properties.

Genetic Analysis of the Liver Putative Tumor Suppressor (LPTS) Gene in Gastric Cancer

Hai Bing Zhang,Qu Zhang,Li Sa Wang,Fei Yan,Yun Lu,Zhi Qiang Wang,Jing Li,Liang Liang Zhang,Ying Yan Yu,Zheng Gang Zhu,Xiang Yin Kong,Lan Dian Hu 한국유전학회 2005 Genes & Genomics Vol.27 No.4