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Model Reference Robust Adaptive H∞ Controller Design
Qiang Zhang,De-Zhi Xu,Kang-Kang Zhang 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.4
In this paper, a novel model reference robust adaptive H∞ controller is designed, which not only guaranteesasymptotically stability, but also optimizes adaptive H∞ performance by estimating the optimal unknowncontrol parameters. Furthermore, a novel state feedback framework is introduced, which depends on the optimalunknown parameter estimations, to guarantee that the defined cost function is minimized. At the same time, theminimal adaptive H∞ performance index is obtained.
Possible Epithelial Ovarian Cancer Association with HPV18 or HPV33 Infection
Zhang, Pei-Pei,Zhou, Lei,Cao, Jia-Shi,Li, Yi-Ping,Zeng, Zhi,Sun, Ni,Shen, Li,Zhu, Hao-Yue,Ruan, Yang,Zha, Wen-Ting,Wang, Xin-Yu,Zhang, Ke-Qiang,Zhang, Ran Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.6
The present study was conducted to investigate the prevalence of HPV infection in epithelial ovarian cancer (EOC) in Hunan province. DNA samples were collected from paraffin embedded ovarian tissue from 322 patients with EOC, 99 with ovarian benign tumors and 199 normal persons. The polymerase chain reaction and direct sequencing were used to identify the HPV types in the samples. The relationship between the infection of human papillomavirus (HPV) and the epithelial ovarian carcinoma (EOC) was investigated combined with clinical data. The prevalence of HPV18 and HPV33 in EOC group and benign group was higher than in the normal group. HPV18 and HPV33 may play a role in the development of both EOC and ovarian benign tumor and may participate in the development of EOC with traditional risk factors, family history and abortion, possibly exerting synergistic effects.
Zhang, Zhi-Qiang,Kim, Young-Min,Song, Soo-Chang American Chemical Society 2019 ACS APPLIED MATERIALS & INTERFACES Vol.11 No.38
<P>Intravenous (IV) route is the most commonly used drug-delivery approach. However, the targeting efficiency to tumor through IV delivery is usually less than 10%. To address this limitation, we report a new systemic delivery method utilizing injectable and quadruple-functional hydrogels to improve targeting efficiency through passive, active, and magnetic targeting, and hydrogel-controlled sustained release. The hydrogels consist of a folate/polyethylenimine-conjugated poly(organophosphazene) polymer, which encapsulates small interfering RNA (siRNA) and Au-Fe<SUB>3</SUB>O<SUB>4</SUB> nanoparticles to form a nanocapsule (NC) structure by a simple mixing. The hydrogels are localized as a long-term “drug-release depot” after a single subcutaneous injection and sol-gel phase transition. NCs released from the hydrogels enter the circulatory systems and then target the tumor through enhanced permeability and retention/folate/magnetism triple-targeting, over the course of circulation, itself prolonged by the controlled release. In vivo experiments show that 12% of NCs are successfully delivered to the tumor, which is a considerable improvement compared to most results through IV delivery. The sustained targeting of gold to tumor enables two cycles of photothermal therapy, resulting in an enhanced silencing effect of siRNA and considerable reduction of tumor volume, which we are unable to achieve via simple intravenous injection.</P> [FIG OMISSION]</BR>
Potential Therapeutic Targets for the Primary Gallbladder Carcinoma: Estrogen Receptors
Zhang, Ling-Qiang,Zhang, Xiu-De,Xu, Jia,Wan, Yong,Qu, Kai,Zhang, Jing-Yao,Wang, Zhi-Xin,Wei, Ji-Chao,Meng, Fan-Di,Tai, Ming-Hui,Zhou, Lei,Liu, Chang Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.4
Gallbladder carcinoma, the most frequent malignant neoplasm of the biliary tract system, has always been considered to feature late clinical presentation and diagnosis, limited treatment options and an extremely poor prognosis. In recent years, while the incidence of gallbladder cancer has appeared to be on the increase, the available treatment methods have not greatly improved survival of the affected patients. Thus, exploring new therapeutic targets for this devastating disease is an urgent matter at present. Epidemical studies have demonstrated that the incidence of gallbladder carcinoma exhibits a distinct gender bias, affecting females two to three times more than males, pointing to crucial roles of estrogen. It is well known that estrogen acts on target tissues by binding to estrogen receptors (ERs), which are mainly divided into three subtypes, $ER{\alpha}$, $ER{\beta}$ and $ER{\gamma}$. $ER{\alpha}$ and $ER{\beta}$ appear to have overlapping but also unique even opposite biological effects. As important pathogenic mediators, ERs have been considered to relate to several kinds of tumors. In gallbladder carcinoma tissue, ERs have been shown to be positively expressed, and ERs expression levels are associated with differentiation and prognosis of this cancer. Nevertheless, the exact mechanisms of estrogen inducing growth of gallbladder carcinoma remain poorly understood. On the base of the current investigations, we deduce that estrogen participates in promotion of gallbladder carcinoma by influencing the formation of gallstones, stimulating angiogenesis, and promoting abnormal proliferation. Since ERs mediate the carcinogenic actions of estrogen in gallbladder, and therapy targeting ERs may provide new directions for gallbladder carcinoma. Therefore, it should be stressed that ERs are potential therapeutic targets for gallbladder carcinoma.
Zhi-qiang Li,Dan Gui,Zhi-hua Sun,Jun-bo Zhang,Wen-zhi Zhang,Hui Zhang,Fei Guo,Chuangfu Chen 대한수의학회 2015 Journal of Veterinary Science Vol.16 No.4
Brucellosis is a zoonotic disease that causes animal and human diseases. Vaccination is a major measure for prevention of brucellosis, but it is currently not possible to distinguish vaccinated animals from those that have been naturally infected. Therefore, in this study, we constructed the Brucella (B.) abortus 2380 wbkA mutant (2308DwbkA) and evaluated its virulence. The survival of 2308DwbkA was attenuated in murine macrophage (RAW 264.7) and BALB/c mice, and it induced high protective immunity in mice. The wbkA mutant elicited an anti-Brucella-specific immunoglobulin G response and induced the secretion of gamma interferon. Antibodies to 2308DwbkA could be detected in sera from mice, implying the potential for use of this protein as a diagnostic antigen. The WbkA antigen would allow serological differentiation between infected and vaccinated animals. These results suggest that 2308DwbkA is a potential attenuated vaccine against 16M. This vaccine will be further evaluated in sheep.
특집 : "거대분단"의 극복과 이상적 동아시아의 가능성: "한중 인문유대 강화"가 지역의 미래에 주는 의미
장즈창 ( Zhi Qiang Zhang ) 서울대학교 통일평화연구원 2013 통일과 평화 Vol.5 No.2
‘한·중 인문유대의 강화’라는 제안은 한·중 간 고유의 인문적 유대를 강화함으로써 오해를 불식하고 정서적 유대를 증진하며 상호 신뢰를 증진하자는 데 그 목적이 있다. 바로 그런 점에서 ‘한·중 인문유대의 강화’라는 제안이 제출된 것이야말로 목전의 한·중 사이에 존재하는, 나날이 엄중해지는 정서적 소원과 상호 약화된 신뢰 상태를 반영한다고 할 수 있다. 그러나 한·중 사이의 정서적 소원과 상호 신뢰의 약화라는 현 상황은 결코 우연이 아니다. 어느 정도에서 그것은 동아시아 내부에 있는 ‘거대 분단’의 증후를 반영한다. 이글은 동아시아 내부에 있는 ‘거대분단’의 의미와 그 효과에 대해 분석하고, ‘거대분단’을 극복하기 위한 인식론적 틀을 수립하며, 동아시아 내부의 ‘거대분단’을 조성하는 이념적 기초에 대해 비판적 분석을 진행하고자 한다. 그리하여 한·중 양국 나아가 동아시아 미래의 이상적 질서를 위해 이론적·역사적 참조를 제공하고자 한다. The purpose of "Strengthening of Korea-China Humanities Ties" is to get rid of possible misunderstandings, to enhance emotional bond and mutual trust by strengthening the humanities relations between Korea and China. This reflects that the proposal of "Korea-China Humanities Ties" implies emotional distance and weakened mutual trust between the two countries. However, the emotional distance and weakened mutual trust is not an accident. In some degree, it reflects the symptoms of “macro-division” within East Asia. This article analyzes the significance and effects of “macro-division”, constructs epistemological frame through which the “macro-division” is expected to overcome and then carries on critical analysis of the ideological grounds for “macro-division”. Furthermore, this article tries to provide theoretical and historical reference for Korea, China and even future ideal order of East Asia.
Hong Zhi Zhang,Meng Qing Wang,Ying Qiang Xie,Mei Xiang,Ping Li,Yu Yan Li,Li Sheng Zhang 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.3
Aphidius gifuensis is an important biological control agent of aphid. It stores sugar as energy reserves before the onset of diapause, a form of dormancy that occurs when environmental conditions become unfavorable for development. In this study, cDNA of three relevant enzymes, trehalose-6-phosphate synthase (TPS), glycogen synthase (GYS) and glycogen phosphorylase (GP) were cloned, and their expression profiles in the preparation and maintenance of diapause, and post-diapause development were analyzed. The results showed that AgTPS, AgGYS and AgGP encoded proteins consisting of 807, 690 and 844 amino acids respectively. The expression profiles of three genes were significantly affected by diapause-inducing condition. The increase of transcription of AgGYS and AgGP were followed by the up-regulate of AgTPS expression in the preparation of diapause, expression of all three genes were inhibited while diapause is maintained, and expression of AgGYS was upregulated when diapause was terminated. These results suggested that trehalose is accumulated before initiation of diapause and glycogen may play an important role in post-diapause development.