Asymptotic Behavior of a Viscous Liquid-Gas Model with Mass-Dependent Viscosity and Vacuum

In this paper, we consider two classes of free boundary value problems of a viscous two-phase liquid-gas model relevant to the flow in wells and pipelines with mass-dependent viscosity coefficient. The liquid is treated as an incompressible fluid whereas the gas is assumed to be polytropic. We obtain the asymptotic behavior and decay rates of the mass functions $n(x,t)$,\$m(x,t)$ when the initial masses are assumed to be connected to vacuum both discontinuously and continuously, which improves the corresponding result about Navier-Stokes equations in \cite{Zhu}.Comment: 24 page

Service model innovation for public administration: a case study of Guizhou entry-exit inspection and quarantine bureau

Currently, the enormous amount of merchandise trade in China brings about a huge demand for more efficient inspection and quarantine services. Due to the rigidity from planning economy, many public administrations still behave like before and their traditional managerial models cannot meet the fast development of the Chinese economy. Therefore how to provide more efficient and qualified services for the trading enterprises has become a big challenge to all Chinese Entry-exit Inspection and Quarantine Bureaus (CIQ). The objective of this thesis is to explore an innovative service model for CIQ to provide better and more efficient services to the trading enterprises. There are altogether six chapters and multiple approaches including empirical study and case study are employed to collect required data and to do theoretical analysis. After the introduction of the history and functions of four Chinese provincial CIQ, a large-scale empirical investigation was done to assess the performance of CIQ and to collect the requirements of trading enterprises. Then based on the results of the empirical study, and taking Guizhou CIQ as a case, this thesis suggested to establish an Entry-exit Inspection and Quarantine Service Center (EIQSC) to meet the market demands. A public-private partnerships (PPP) model was suggested to address the ownership issue of the EIQSC and its business model was also analyzed. In particular, four components including value proposition, strategy positioning, key activities, and profiting model were discussed in detail. Finally, the implications of EIQSC were discussed especially its application in other provinces of China.A atual vasta quantidade de comércio de mercadorias na China determina a elevada procura por serviços de inspeção e quarentena mais eficientes. Muitas administrações públicas ainda se comportam como antigamente, devido à rigidez da economia de planeamento, e os seus modelos de gestão tradicionais não se adaptam ao rápido desenvolvimento da economia Chinesa. Consequentemente, um dos grandes desafios de todas as Agências de Quarentena e Inspeção de Entrada-saída (CIQ) Chinesas tem sido como fornecer serviços mais eficientes e qualificados às empresas de comércio. O objectivo desta tese é explorar um modelo de serviços inovador para as CIQ de forma a fornecer melhores e mais eficientes serviços às empresas de comércio. A tese está estruturada em seis capítulos contendo múltiplas abordagens, incluindo um estudo empírico e um estudo de caso, para a recolha dos dados necessários e realização da análise teórica. Após a introdução do enquadramento histórico e das funções de quatro CIQ de províncias Chinesas, foi realizado uma investigação empírica de larga-escala para avaliar o desempenho das CIQ e para recolher os requisitos das empresas de comércio. Seguidamente, com base nos resultados do estudo empírico, e tomando como exemplo a CIQ de Guizhou, foi sugerido nesta tese a criação de um Centro de Serviços de Quarentena e Inspeção Entrada-saída (EIQSC) para fazer face às necessidades do mercado. Foi sugerida a utilização do modelo de parcerias público-privadas (PPP) para o EIQSC, tendo o seu modelo de negócio sido igualmente analisado. Em particular, quatro componentes foram discutidas em detalhe: proposta de valor, posicionamento estratégico, atividades chave e modelo de lucro. Por fim, foram discutidas as implicações do EIQSC, especialmente a sua aplicação em outras províncias da China

Development of self-control in early childhood— a growth mixture modeling approach

A grant from the One-University Open Access Fund at the University of Kansas was used to defray the author's publication fees in this Open Access journal. The Open Access Fund, administered by librarians from the KU, KU Law, and KUMC libraries, is made possible by contributions from the offices of KU Provost, KU Vice Chancellor for Research & Graduate Studies, and KUMC Vice Chancellor for Research. For more information about the Open Access Fund, please see http://library.kumc.edu/authors-fund.xml.Self-control emerges in early childhood and is shown to be strongly related to poor adulthood outcomes. The development of self-control was long believed to be homogeneous among individuals and stable in rank. The purpose of the current study was to (1) examine if multiple growth trajectories of self-control existed in early childhood by using growth mixture modeling approach, (2) investigate if growth trajectories of self-control were the function of child, family, and school characteristics. Using data from the Early Childhood Longitudinal Study-Kindergarten Cohort of 2011 (ECLS-K:2011), we found (1) three distinct growth trajectories of self-control existed in the ECLS-K sample, namely, the high, medium, and low level of self-control; (2) self-control levels in all groups were relatively stable during early childhood; (3) teacher expectation and teacher-student relationship significantly predicted growth trajectories of self-control above and beyond certain child and family characteristics

Transmissive RIS Transmitter Enabled Spatial Modulation for MIMO Systems

In this paper, we propose a novel transmissive reconfigurable intelligent surface (TRIS) transmitter-enabled spatial modulation (SM) multiple-input multiple-output (MIMO) system. In the transmission phase, a column-wise activation strategy is implemented for the TRIS panel, where the specific column elements are activated per time slot. Concurrently, the receiver employs the maximum likelihood detection technique. Based on this, for the transmit signals, we derive the closed-form expressions for the upper bounds of the average bit error probability (ABEP) of the proposed scheme from different perspectives, employing both vector-based and element-based approaches. Furthermore, we provide the asymptotic closed-form expressions for the ABEP of the TRIS-SM scheme, as well as the diversity gain. To improve the performance of the proposed TRIS-SM system, we optimize ABEP with a fixed data rate. Additionally, we provide lower bounds to simplify the computational complexity of improved TRIS-SM scheme. The Monte Carlo simulation method is used to validate the theoretical derivations exhaustively. The results demonstrate that the proposed TRIS-SM scheme can achieve better ABEP performance compared to the conventional SM scheme. Furthermore, the improved TRIS-SM scheme outperforms the TRIS-SM scheme in terms of reliability

Effectiveness of Ultrasound-Guided Minimally Invasive Spinotomy in the Treatment of Multiple Small Benign Breast Nodules

Objective: To observe the efficacy of different surgical protocols in the management of multiple benign breast nodules. Methods: Patients diagnosed with multiple benign breast nodules from 2021.4 to 2023.2 were divided into two groups, blank and study groups, each with 51 cases, and treated with conventional open and ultrasound-guided minimally invasive rotational surgery respectively. Results: The study group had better incision diameter and VAS score at 24h postoperatively than the blank group, with significant differences (P < 0.05). Regarding the postoperative complication rate index, the study group vs. the blank group was 3.92% vs. 21.57% (P < 0.05). Conclusion: Minimally invasive spinotomy under ultrasound guidance for the treatment of patients with multiple breast nodules is safe and effective and has the potential to be used universally

Analysis of Clinical Efficacy of Single-Port Endoscopic Breast-Conserving Surgery and Modified Radical Mastectomy in the Treatment of Early Breast Cancer

Objective: To analyze the effect of single-port endoscopic breast-conserving surgery and modified radical mastectomy in the treatment of early breast cancer. Methods: The research subjects included in this study were 52 patients with early breast cancer who were admitted to our hospital from February 2020 to February 2021. They were divided into control group and experimental group by random number table method. The control group received modified radical mastectomy(26 cases), and the experimental group received single-port endoscopic breast-conserving surgery (26 cases). The treatment effects of the two groups were compared. Results: The blood loss, incision length and hospital stay in the experimental group were lower than those in the control group (P<0.05), but the operation time was significantly longer than that in the control group (P<0.05). There were significant differences in breast beauty between the two groups, and the experimental group was better (P<0.05). Conclusion: Single-port endoscopic breast-conserving surgery and modified radical mastectomy are used in the treatment of early breast cancer, and the treatment effect of the former is significantly better than that of the latter. This treatment method can be promoted

Analysis of the Effectiveness of Globe Incision Mammaplasty in the Treatment of Early Breast Cancer

Objective: To observe the efficacy of different methods in the treatment of early stage breast cancer disease. Methods: 84 patients admitted from 2020.12 to 2022.8 were divided into groups I and II, 42 patients each, who received treatment after conventional breast-conserving and racket-shaped incision mammoplasty, respectively, and compared the surgical treatment of patients between groups. Results: The rates of cosmetic excellence and complications in group II were 95.2% and 7.1% respectively, compared with 73.8% and 35.7% in group I. The differences reached a significant level (X² 5.825,8.556 respectively, P equals 0.016,0.003 both <0.05). Conclusion: The treatment of early breast cancer patients with racket-shaped incisions for mammaplasty is cosmetically effective and safe, and is worth promoting