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We report a simple preparation method of in situ oxidized titanium carbide MXene for photocatalytic degradation of catechol.

3,4-Methylenedioxyamphetamine (MDA) and 3,4-methylenedioxymethamphetamine (MDMA) are the main components of illicit stimulant drugs, also known as "ecstasy", which belong to psychoactive medicine and tend to be increasingly abused among drug addicts worldwide. Herein, an electrochemical sensor based on molecularly imprinted polydopamine (MIP@PDA) was developed to detect MDA and MDMA using differential pulse voltammetry (DPV). An MIP film on a Au electrode was synthesized

Exploring the effects of uterine imaging and hysteroscopy of endometrial polyps, this article has chosen the treatment effect of 50 cases of intrauterine polyps to observe hysteroscopy. The results showed that the diagnosis and sensitivity, specificity, positive, negative, and consistency were passed through various diagnostic methods ( P < 0.05 ). The diagnostic sensitivity of antidiagnosis combination and series combination was 90.0%, 64.0%, 96.0%, 92.0%, 80.0%, 80.0%, 88.0%, and 92.0%, parallel diagnosis with high sensitivity, significantly higher than simple diagnosis ( P < 0.05 ). Therefore, in the clinical treatment of endometrial polyps, hysteroscopic surgery is a safe and effective treatment, which can remove endometrial quality, improve the clinical symptoms of patients, and reduce the interference and postoperative recovery process of surgical trauma.

Jing Ren,1 Dongfang Han,2 Jingjun Zhang,1 Yingli Wang,3 Qiaoqiao Huang,4 Tian Tian,1 Xiaomei Li1 1School of Nursing, Health Science Center, Xi’an Jiaotong University, Xi’an City, People’s Republic of China; 2Department of Obstetrics and Gynecology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an City, People’s Republic of China; 3Department of Internal Medicine of Tuberculosis, Fourth Hospital of Inner Mongolia Autonomous Region, Hohhot City, People’s Republic of China; 4Department of Nursing, Fourth Hospital of Inner Mongolia Autonomous Region, Huhhot City, People’s Republic of ChinaCorrespondence: Xiaomei LiSchool of Nursing, Health Science Center, Xi’an Jiaotong University, No. 76 Yanta West Road, Yanta District, Xi’an City, Shanxi, 710061, People’s Republic of ChinaTel/Fax +86 29 82657017Email roselee8825@126.comPurpose: Patients affected by tuberculosis have diverse unmet supportive care needs (SCN) that may seriously affect their treatment adherence. Accurately assessing patients’ SCN is important for providing efficient patient-centred care, but few instruments are suitable for use in clinical practice. Therefore, the purpose of this study was to develop an SCN scale for patients with tuberculosis (SCN-TB) and to evaluate its psychometrical properties.Patients and Methods: Based on the SCN framework, the SCN-TB was designed via a literature review, Delphi consultation and pilot study. Then, 550 patients from four tuberculosis specialist hospitals in Shaanxi Province were enrolled by convenience sampling to further test the validity and reliability of the SCN-TB.Results: A total of 518 patients completed the survey. The final scale encompasses 25 items in five domains: physical, practical, psycho-emotional, social, and informational. The content validity for the scale was 0.93, with that for each item ranging from 0.80 to 1.00. Five factors that explained 80.38% of the variance were identified in exploratory factor analysis. A five-factor model was then confirmed with confirmatory factor analysis using maximum likelihood estimation with bootstrapping. The model fit indices were χ2/df=1.062 (Bollen-Stine χ2=281.382, df=265, p< 0.001), CFI=0.997, RMSEA=0.016, SRMR=0.053, NFI=0.951, and GFI=0.929. All factors had acceptable convergent and discriminant validity. The Cronbach’s α, split-half, and test-retest reliability coefficients of the scale were 0.884, 0.883, and 0.854, respectively.Conclusion: The SCN-TB is a valid and reliable theory based tool for assessing the needs of patients with tuberculosis and can be applied in both clinical practice and research.Keywords: needs assessment, tuberculosis, patient-centered care, quality of healthcare, supportive care

Both type II and Z schemes can explain the charge transfer behavior of the heterojunction structure well, but the type of heterojunction structure formed between bismuth vanadium oxide and carbon nitride still has not been clarified. Herein, we rationally prepared bismuth vanadium oxide with {010} and {012} facets predominantly and carbon nitride as a decoration to construct a core-shell structure with bismuth vanadium oxide wrapped in carbon nitride to ensure the same photocatalytic reaction interface. Through energy band establishment and radical species investigation, both {010} and {012} facets dominated bismuth vanadium oxide/carbon nitride composites exhibit the type II heterojunction structures rather than the Z-scheme heterojunctions. Furthermore, to investigate the effect of type II heterojunction, the photocatalytic tetracycline degradations were performed, finding that {010} facets dominated bismuth vanadium oxide/carbon nitride composite demonstrated the higher degradation efficiency than that of {012} facets, due to the higher conduction band energy. Additionally, through the free radical trapping experiments and intermediate detection of degradation products, the superoxide radical was proven to be the main active radical to decompose the tetracycline molecules. Therein, the tetracycline molecules were degraded to water and carbon dioxide by dihydroxylation-demethylation-ring opening reactions. This work investigates the effect of crystal planes on heterojunction types through two different exposed crystal planes of bismuth vanadate oxide, which can provide some basic research and theoretical support for the progressive and controlled synthesis of photocatalysts with heterojunction structures.

A heterojunction photocatalytic system has been widely called for to solve tetracycline (TC) water pollution problems. However, the pollutant degradation mechanism with a Z-scheme or double-charge transfer photocatalyst has remained ambiguous. In this work, we successfully constructed a controllable heterojunction between TiO2 and Cu2O by adjusting the exposed facets of Cu2O without additional surfactant. XPS, FT-IR, EIS, PL, EPR, LC-MS, photocurrent curves and scavenger experiments, as well as XRD characterization before and after photocatalysis, demonstrate that the heterojunction with double-charge transfer mechanism exists between TiO2 and cubic Cu2O exposed {100} facets (100Cu2O), where electrons diverted from 100Cu2O to TiO2 by O atoms to enhance the TC photocatalytic degradation rate. However, the complete decomposition of TC intermediate products was attenuated as the TC degradation reaction was drifted on the more positive conduction band of TiO2. Instead, Z-scheme heterojunction between TiO2 and octahedral Cu2O exposed {111} facets, (111Cu2O) was formed where electrons moved from the conduction band of TiO2 to the valence band of 111Cu2O by Cu atoms. Thereby, TC degradation occurred at the conduction band of 111Cu2O, which enhanced the TC photo-degradation rate and the profound decomposition of TC intermediate simultaneously. We expect that this work can contribute to the prospective application of heterojunction for the photocatalytic degradation of antibiotics.

The photoelectrochemical properties of semiconductors mainly depend on the size and shape of the corresponding nanoparticles. Herein, 3D WO3 nanosheets were controllably synthesized with the aid of polyethyleneimine, which presents enhanced photocurrent responses. Based on this excellent photoelectrochemical property, a photoelectrochemical chip was prepared by lithography technology for the smart monitoring of the antioxidant capacity(AC) in red wine and exhibits a series of advantages including rapid response time, high sensitivity, and long-lasting stability. The mechanism of the present photoelectrochemical sensing was explored and shows a single electron transfer reaction. Furthermore, only 200 µL of samples are required for one testing, which demonstrates that the present photoelectrochemical chip can be potentially integrated with a portable commercial device(such as a mobile phone) for further research and development of food and drug supervision.

Photocatalytic ammonia (NH3) synthesis from N2 is a strategy conducive to carbon neutrality because it avoids high energy consumption and high carbon emission process in the industrial synthesis of NH3. However, the structure-activity relationship of bimetallic active centers in heterogeneous catalysts is still dimness for high-performance photocatalytic nitrogen reduction reaction (pNRR). Here, a rational N2-bridging strategy for heterogeneously pNRR has been expanded through regulating bimetallic Ti-Pd active centers at TiO2 (101)/Pd (111) interface and the structure-activity correlation during the pNRR was explored. The side-on adsorption with “*N ≡ N*” configuration (*presents the adsorption site) on Ti-Pd centers induces a considerable polarization and potent activation of N2, enabling to achieve an impressive rate of NH3 production (635.73 µg gcat.−1 h− 1) on the optimal se-Pd/m-TiO2 NRs (2.71%). More importantly, nearly ~ 92.37% of initial activity could be retained following 8 successive reaction rounds. Further mechanism studies revealed that the side-on bridging mode of N2 with bimetallic Ti-Pd centers possesses an ultra-high adsorption energy, which can effectively weaken the triple bond of N2 and reduce the activation energy barrier of pNRR process. This study provides insights into the electronic structure regulation of bimetallic active centers and structure-property relationship at the atomic level.

Background: Rates of perinatal depression in China are high. The Thinking Healthy Programme is a WHO-endorsed, evidence-based psychosocial intervention for perinatal depression, requiring five days of face-to-face training by a specialist trainer. Given the paucity of specialist trainers and logistical challenges, standardized training of large numbers of nurses is a major challenge for scaling up. We developed an electronic training programme (e-training) which eliminates the need for specialist-led, face-to-face training. The aim of this study was to evaluate the effectiveness of the e-training compared to conventional face-to-face training in nursing students. Methods: A single blind, non-inferiority, randomized controlled trial was conducted. One hundred nursing students from two nursing schools were randomly assigned to either e-training or conventional face-to-face training. Results: E-training was not inferior to specialist-led face-to-face training immediately post-training [mean ENhancing Assessment of Common Therapeutic factors (ENACT) score (M) 45.73, standard deviation (SD) 4.03 vs. M 47.08, SD 4.53; mean difference (MD) −1.35, 95% CI; (−3.17, 0.46), p = 0.14]. There was no difference in ENACT scores at three months [M = 42.16, SD 4.85 vs. M = 42.65, SD 4.65; MD = −0.481, 95% CI; (−2.35, 1.39), p = 0.61]. Conclusions: E-training is a promising tool with comparative effectiveness to specialist-led face-to-face training. E-training can be used for training of non-specialists for evidence-based psychosocial interventions at scale and utilized where there is a shortage of specialist trainers, but practice under supervision is necessary to maintain competence. However, continued practice under supervision may be necessary to maintain competence.

Background Breast cancer may impair health-related quality of life (HRQoL). We examined the mediating roles of perceived social support (PSS) and coping style (CS) in the relationship between resilience and HRQoL in newly diagnosed breast cancer patients. Methods Following a cross-sectional design, 431 patients completed a survey at two hospitals in Shaanxi Province, China. Four validated self-report measures assessed HRQoL, psychological resilience, PSS, and CS. A one-sample t-test analyzed differences between resilience, PSS, and CS in breast cancer patients and the corresponding norm. Multivariate linear regression analyzed the independent predictors of HRQoL. The mediating roles of PSS and CS between resilience and HRQoL were investigated using structural equation modeling (SEM). Results Participants had significantly lower scores for resilience and PSS, and higher scores for the avoidance and resignation CSs than their corresponding norm. SEM analysis showed resilience had significant direct effects on PSS (Bs: 0.59, 95% CI 0.49, 0.68, P = 0.003), CS (confrontation: 0.53 (0.44, 0.62), P = 0.001; resignation: − 0.66 (− 0.74, − 0.57), P = 0.002), and HRQoL (Bs range from 0.44 to 0.63, P Bs range from 0.09 to 0.27), and PSS and CS had significant direct effects on HRQoL (P Conclusions Newly diagnosed breast cancer patients had lower resilience and PSS, and higher negative CSs, suggesting that PSS and CS mediated the influence of resilience on HRQoL. A multimodal intervention program focusing on PSS and CS might improve the positive influences of resilience on HRQoL in breast cancer patients.

Background Swallowing function and swallowing-related quality of life (QoL) can be adversely affected in patients after partial laryngectomy, but are often neglected by patients and clinical workers. This study aimed to investigate the degree of swallowing function and swallowing-related QoL after partial laryngectomy in patients with laryngeal carcinoma. Methods Sixty-eight hospitalized patients undergoing partial laryngectomy due to laryngeal carcinoma at the Second Affiliated Hospital of Xi’an Jiao Tong University were included in this prospective study. A general information questionnaire was used to collect baseline characteristics. The water swallow test and swallowing quality of life questionnaire (SWAL-QOL) were carried out the day before surgery and at 2, 4, 12, 24 and 48 weeks after surgery. Results Swallowing dysfunction occurred in 1 case (1.5%) the day before surgery and in 49 (72.1%), 44 (64.7%), 33 (49.3%), 19 (28.4%) and 8 (11.9%) cases at 2, 4, 12, 24 and 48 weeks after surgery, respectively. Mean SWAL-QOL total scores were 4266.3 ± 232.0 the day before surgery, and 1992.9 ± 1062.4, 2473.9 ± 962.9, 3169.2 ± 753.6, 3696.7 ± 718.3 and 3910.8 ± 1510.4 at 2, 4, 12, 24 and 48 weeks, respectively. SWAL-QOL total scores increased gradually after operation, and the differences were statistically significant (P

Propyl gallate (PG) as one of the important synthetic antioxidants is widely used in the prevention of oxidative deterioration of oils during processing and storage. Determination of PG has receive...

Poor charge separation is the main factor that limits the photocatalytic hydrogen generation efficiency of organic conjugated polymers. In this work, a series of linear donor–acceptor (D–A) type oligomers are synthesized by a palladium-catalyzed Sonogashira–Hagihara coupling of electron-deficient diborane unit and different dihalide substitution sulfur functionalized monomers. Such diborane-based A unit exerts great impact on the resulting oligomers, including distinct semiconductor characters with isolated lowest unoccupied molecular orbital (LUMO) orbits locating in diborane-containing fragment, and elevated LUMO level higher than water reduction potential. Relative to A-A type counterpart, the enhanced dipole polarization effect in D–A oligomers facilitates separation of photogenerated charge carriers, as evidenced by notably prolonged electron lifetime. Owing to π–π stacking of rigid backbone, the oligomers can aggregate into an interesting 2D semicrystalline nanosheet (≈2.74 nm), which is rarely reported in linear polymeric photocatalysts prepared by similar carbon–carbon coupling reaction. Despite low surface area (30.3 m2 g−1), such ultrathin nanosheet D–A oligomer offers outstanding visible light (λ > 420 nm) hydrogen evolution rate of 833 µmol g−1 h−1, 14 times greater than its A-A analogue (61 µmol g−1 h−1). The study highlights the great potential of using boron element to construct D–A type oligomers for efficient photocatalytic hydrogen generation. © 2021 Wiley-VCH GmbH

Background Breast cancer may impair health-related quality of life (HRQoL). We examined the mediating role of coping style (CS) in the relationship between resilience, perceived social support (PSS), and HRQoL in newly diagnosed breast cancer patients in the Chinese mainland. Methods A total of 431 patients completed a survey at two hospitals in Shaanxi Province, China, using self-report measures assessing HRQoL, resilience, PSS, and CS. A one-sample t-test analyzed differences between resilience, PSS, and CS in breast cancer patients and the corresponding norm. Multivariate linear regression analyzed the independent predictors of HRQoL. The mediating role of CS between resilience, PSS, and HRQoL were investigated using structural equation modeling (SEM). Results Participants had significantly lower scores for resilience and PSS and higher scores for the avoidance and resignation CSs than their corresponding norm. SEM analysis showed resilience had significant direct effects on CS (B:0.66, 95% CI: 0.54, 0.77) and HRQoL [0.32 (0.12, 0.49)]. PSS had significant direct effects on CS [0.18 (0.06, 0.29)]. Resilience [0.32 (0.19, 0.53)] and PSS [0.09 (0.03, 0.18)] had significant indirect effects, and resilience [0.64 (0.56, 0.71)] had significant total effects on HRQoL. CS had significant direct and total effects on HRQoL [0.48 (0.30, 0.72)]. Conclusions Newly diagnosed breast cancer patients of mainland China had lower resilience and PSS and higher negative CSs. CS appeared to mediate the influence of resilience and PSS on HRQoL. Multimodal intervention programs focusing on CS might increase the influence of resilience and PSS on HRQoL in breast cancer patients.

Objective: To explore the effect of multidisciplinary collaborative continuous nursing on the psychological state and quality of life of cervical cancer patients. Methods: A total of 132 patients with cervical cancer who were hospitalized in our hospital were selected as the research subjects, and they were randomized into the observation group (n=66) and the control group (n=66). The control group was given regular continuous nursing, while the observation group was given three-month multidisciplinary collaborative continuous nursing. It was conducted through WeChat, telephone follow-up, face-to-face consultation and lectures, giving guidance on diet, medication, pain control, psychological health, self-care, review time, recognition and processing of postoperative complications, daily activities, social behaviors and so on. Patients’ anxiety, depression, quality of life, cancer-related fatigue, complication incidence, and sleep quality were compared between the two groups. Results: Self-rating Anxiety Scale (SAS) and Self-Rating Depression Scale (SDS) were applied for evaluation. The anxiety and depression scores of patients in the observation group were significantly lower than those in the control group (both P

Effective evaluation methods for assessing the nutritional quality of foods that eliminate free radicals (i.e., foods that are classified as antioxidants) have long attracted the attention of scientists and the populace. In this case, constructing a corresponding photoelectrochemical sensor that has the advantages of being intuitive, rapid, and capable of accurate assessment for global antioxidant capacity is of profound significance. In this study, a novel g-C3N4/NiS/TiO2 photoelectric sensitive platform was constructed and afforded the possibility of a synergistic/antagonistic effect for estimating intrinsic antioxidant ingredients in food. Further investigation revealed that the internal influences of the compound structure, such as the redox potential and type of groups on the molecular benzene ring should be the main internal reasons for antioxidant synergistic behaviors. The photochemical strategy of concern is expected to provide benefits for on-site foods nutrition assays that should become a guide for health care diets.

Background Providing integrated patient-centred care based on the patient’s needs has emerged as the first pillar of tuberculosis prevention and control strategies. However, a reliable and valid instrument is still lacking. Hence, the aim of this study was to develop and psychometrically test a new scale for assessing the supportive care needs of patients with pulmonary tuberculosis. Methods A methodological study involving item generation and psychometric evaluation was used. Based on the Supportive Care Needs Framework, the item-pool was drafted from a systematic review of the literature, expert consultations and feedback from a pilot study. A convenience sample of 518 patients was recruited from four hospitals in Shaan’xi Province from September 10, 2019, to January 20, 2020. Item reduction and scale validation were assessed for content validity, construct validity, Cronbach’s alpha coefficient, half-split reliability, and test-retest reliability. Results The final scale encompasses 25 items in five domains: practical, psycho-emotional, social, information and physical. The item level content validity index ranged from 0.80 to 1.00, and the scale level content validity was 0.925. Five factors that explained 80% of the total variance were also identified in exploratory factor analysis and confirmed in confirmatory factor analysis. The CFA model fit indices were x2/df = 2.229 (p

The anti-aging of human skin is always an essential factor concerned by people who love beauty. In order to maintain skin at a healthy and fair situation, proper cosmetics will achieve the expected anticipation, in which the antioxidant component should undertake the pivotal composition to resist free radicals. Antioxidant capacity detection should provide direct evidence for cosmetics identification and evaluation. In this paper, a photoelectrochemistry (PEC) platform based on N-doped graphene/TiO2 (NGT) nanocomposite has been established, which was for the first time proposed as sensor for antioxidants capacity assay. The annealing technique has been employed for in-situ preparation of NGT and successful nitrogen atoms doping was verified by XPS as well as elemental mapping technique. This PEC platform was successfully acted as sensing activation into antioxidant capacity evaluation toward different commercial cosmetics prototypes. Subsequently, the related mechanism was further unearthed and in-depth discussed. This investigation should have meaningful instructions on makeup screening as well as profound impact on guidance of healthy daily life for human beings.

Propyl gallate (PG) as one of the important synthetic antioxidants is widely used in the prevention of oxidative deterioration of oils during processing and storage. Determination of PG has received extensive concern because of its possible toxic effects on human health. Herein, we report a photoelectrochemical (PEC) sensor based on ZnO nanorods and MoS

This study investigates the linear quadratic Gaussian state regulation problem over a packet-dropping network. A linear predictive compensation scheme is proposed to counteract the uncontrollable packet loss. To characterise the operating state of the system, differently from the widely used Markov jump linear systems theory or multi-mode Markov chain, in this study the actual control command executed to the plant is expressed as a stochastic sequence. Moreover, the original information set is divided into several subsets, which benefits to establish the quantitative relationship between the infinite-horizon quadratic performance index and the prediction horizon. A numerical example is provided to show that there exists an optimal prediction horizon to minimise the performance index.

The authors consider a sensor scheduling problem for a scalar system observed by two sensors. The measurements derived from the two local sensors are sent over a bandwidth-limited network to a remote estimator. The bandwidth constraint allows at most one packet can be sent at each time step. Upon receiving the data, the estimator computes the optimal estimate of the state in the minimum mean-squared error sense. In consideration of simplicity as well as practical and efficient implementation, the authors focus on periodic scheduling scheme. The authors assume that the sensor energy is so limited that in each period there exist open-loop predictions at some steps, which makes the problem more challenging. Using some novel tools, it was shown that the `as uniformly as possible' scheme, originally proposed in an early work for minimising the average estimation error covariance when sensor energy is just enough, still holds true in this limited energy case but the optimal steps of open-loop prediction depend on the system parameters. Such a relationship between scheduling rule and system parameters is novel and does not exist in early works where sensor energy is just enough. Numerical examples are provided to demonstrate the key ideas of the proposed work.

We consider periodic sensor scheduling in this paper. A system is observed by two sensors. The two sensors communicate their data with a remote state estimator via a bandwidth-limited network which allows only one sensor to send its data at each time. We derive the optimal duty cycle pair and a corresponding sensor data schedule to minimize the trace of the average estimation error covariance. Simulations are provided to demonstrate the results.

We consider the problem of linear minimum mean square error estimation for a discrete-time system over a packet-dropping network. In order to improve the estimation performance, different from the standard approach of sending the current measurement data, we choose sending a linear combination of the current measurement and the measurement collected at the previous time, a method called linear temporal coding. We assume the packet arrival sequence is unknown and the noise contained in the packet may come from sensor or communication channel. In an effort to cope with colored noise caused by measurement combination, after comparing with the classic state augmentation approach and measurement differencing approach, we derive a recursive estimation algorithm by means of orthogonal projection principle and innovation sequence approach. Our algorithm consists of two parts: smooth and estimate. For large measurement noise case, numerical example shows the benefit of using linear temporal coding strategy, compared with directly sending the current data. On the contrary, when communication noise plays the dominating role, for scalar system we prove there is no benefit to choose this scheme.

We consider the problem of guaranteed cost control (GCC) of affine nonlinear systems in this paper. Firstly, the general affine nonlinear system with the origin being its equilibrium point is represented as a linear-like structure with state-dependent coefficient matrices. Secondly, partition of unity method is used to approximate the coefficient matrices, as a result of which the original affine nonlinear system is equivalently converted into a linear-like system with modeling error. A GCC law is then synthesized based on the equivalent model in the presence of modeling error under certain error condition. The control law ensures that the system under control is asymptotically stable as well as that a given cost function is upper-bounded. A suboptimal GCC law can be obtained via solving an optimization problem in terms of linear matrix inequality (LMI), in stead of state-dependent Riccati equation (SDRE) or Hamilton-Jacobi equations that are usually required in solving nonlinear optimal control problems. Finally, a numerical example is provided to illustrate the validity of the proposed method.

Both the Global Registry of Acute Coronary Events (GRACE) risk score and neutrophil count could predict clinical outcomes in patients with acute coronary syndromes. However, the ability of them to identify high risk patients leaves room for improvement. The purpose of the present study was to evaluate whether the combination of them could have a better performance in predicting clinical outcomes in patients with ST-elevation myocardial infarction (STEMI).A total of 1287 consecutive STEMI patients were recruited at two centers in China. Neutrophil count was measured and the GRACE risk score was calculated.During a median period of 37 months (IQR, 29-47), 135 (10.9%) patients had major adverse cardiovascular events (MACE), including 116 all-cause death. Neutrophil count and the GRACE risk score were higher in patients with MACE. Both neutrophil count and the GRACE score were significant and independent predictors for MACE [HR: 1.260 (1.203-1.319), P 0.001; HR: 1.007 (1.002-1.011), P 0.001; respectively). Combination of them increased the area under the ROC (0.698 vs. 0.796, P 0.001). The addition of neutrophil count to GRACE model enhanced net reclassification improvement (0.637, P = 0.020) and integrated discrimination improvement (0.180, P 0.001), suggesting effective discrimination and reclassification.Both neutrophil count and the GRACE risk score are independent predictors for MACE in patients with STEMI. A combination of them could derive a more accurate prediction for clinical outcomes in these patients.

Edição trilíngue: português, espanhol e inglês. Título em espanhol: Una mirada sobre el futuro democrático de China Título em inglês: A vision of China's democratic future Submitted by Cleice Pereira Santos null (cleiceps@stj.jus.br) on 2015-02-03T19:28:32Z No. of bitstreams: 1 vislumbrando_futuro_democratico_dongfang.pdf: 202184 bytes, checksum: 96cd22c33f2dc4fea365607d617ebedc (MD5) Rejected by Cleice Pereira Santos null(cleiceps@stj.jus.br), reason: .... on 2015-02-20T18:09:42Z (GMT) Submitted by Cleice Pereira Santos null (cleiceps@stj.jus.br) on 2015-02-20T18:11:41Z No. of bitstreams: 2 vision_chinas_democratic_dongfang.pdf: 156852 bytes, checksum: 450fe4a9cc87ab461f829bad7eec6ea6 (MD5) vislumbrando_futuro_democratico_dongfang.pdf: 202184 bytes, checksum: 96cd22c33f2dc4fea365607d617ebedc (MD5) Rejected by Cleice Pereira Santos null(cleiceps@stj.jus.br), reason: .... on 2015-02-23T19:37:03Z (GMT) Submitted by Cleice Pereira Santos null (cleiceps@stj.jus.br) on 2015-02-23T19:39:46Z No. of bitstreams: 3 una_mirada_sobre_dongfang.pdf: 201965 bytes, checksum: a4637121e840a2c0ebd516fd0c8e6f84 (MD5) vision_chinas_democratic_dongfang.pdf: 156852 bytes, checksum: 450fe4a9cc87ab461f829bad7eec6ea6 (MD5) vislumbrando_futuro_democratico_dongfang.pdf: 202184 bytes, checksum: 96cd22c33f2dc4fea365607d617ebedc (MD5) Approved for entry into archive by Rafaella Carine Monterei null(rcarine@stj.jus.br) on 2015-04-24T18:45:06Z (GMT) No. of bitstreams: 3 una_mirada_sobre_dongfang.pdf: 201965 bytes, checksum: a4637121e840a2c0ebd516fd0c8e6f84 (MD5) vision_chinas_democratic_dongfang.pdf: 156852 bytes, checksum: 450fe4a9cc87ab461f829bad7eec6ea6 (MD5) vislumbrando_futuro_democratico_dongfang.pdf: 202184 bytes, checksum: 96cd22c33f2dc4fea365607d617ebedc (MD5) Made available in DSpace on 2015-04-24T18:45:07Z (GMT). No. of bitstreams: 3 una_mirada_sobre_dongfang.pdf: 201965 bytes, checksum: a4637121e840a2c0ebd516fd0c8e6f84 (MD5) vision_chinas_democratic_dongfang.pdf: 156852 bytes, checksum: 450fe4a9cc87ab461f829bad7eec6ea6 (MD5) vislumbrando_futuro_democratico_dongfang.pdf: 202184 bytes, checksum: 96cd22c33f2dc4fea365607d617ebedc (MD5) Previous issue date: 2014

We consider state estimation for a discrete-time system over a lossy network. In order to improve the estimation performance, different from the standard approach of sending the current measurement data, we choose sending a linear combination of the current measurement and the measurement collected at the previous time, a method called linear temporal coding. We consider the case when the packet arrival sequence is unknown. In an effort to cope with colored noise caused by measurement combination, after comparing with the classic state augmentation approach and measurement differencing approach, we derive a recursive estimation algorithm by means of orthogonal projection principle and innovation sequence approach. Our algorithm consists of two parts: smooth and estimate. Numerical example shows the benefit of using linear temporal coding strategy, compared with directly sending the current data.

The nonlinear system model is equally converted into an approximate model with error by using partition of unity, which has the capability of approximating a continuous function at arbitrary precision. A guaranteed cost controller is then proposed for the nonlinear system based on the approximate model under certain error condition. The controller ensures that the system controlled is quadratically stable as well as that the cost function is bounded. Finally, a numerical simulation illustrates the validity of the method in this paper.