改进的有自由面渗流问题的Bathe算法

建议了一个新的有自由面渗流问题的变分不等式提法,该提法通过将潜在出渗面上的边界条件提为Signorini型条件,从而从理论上消除了出渗点的奇性,解决了出渗点的定位问题。同时在离散求解时,通过引进依赖于网格参数的连续型Heaviside函数,克服了Bathe算法中所固有的网格依赖性,提高了这类方法的数值稳定性。

基于Bathe积分算法的机械系统多体动力学方程求解方法

准确与高效的求解算法一直是多体系统动力学领域的关键问题.重点研究了将Bathe积分算法应用于机械系统多体动力学方程的求解,将多体系统动力学方程整理为显含广义阻尼矩阵的一般形式.利用Bathe积分策略,推导了基于此形式动力学方程的求解流程,并将广义阻尼矩阵用于迭代计算时雅克比矩阵初值的选择,减少迭代计算次数.为了减小违约的影响,动力学方程中添加了Baumgarte违约稳定项.数值算例表明:利用Bathe积分算法求解多体系统动力学方程具有高准确性、良好的稳定性和较低的数值耗散,显含广义阻尼矩阵的动力学方程形式也使求解更加高效.

NYIMA COUNTY BATHED IN SUN SHINE

Situated in the lake basin of Changtang Plateau in the northwest part of Nagchu Prefecture and surrounded by Mts.Kunlun and Kukushiri at the north and Mt. Gangdise at the south,although Nyima County covers over 150 thousand sq.kilometres,it is populated with less than 30 thousand people.

雷公藤多苷联合益赛普治疗强直性脊柱炎的效果及对BASDAI评分与BMP-2表达的影响

目的 观察雷公藤多苷联合注射用重组人Ⅱ型肿瘤坏死因子受体—抗体融合蛋白(益赛普)治疗强直性脊柱炎(AS)的效果及对Bath强直性脊柱炎疾病活动指数(BASDAI)评分与骨形态发生蛋白2(BMP-2)表达的影响。方法 回顾性选取2021年6月—2023年6月桂林医学院附属医院收治的强直性脊柱炎(AS)患者80例,依据治疗方案不同分为联合组和对照组,每组40例。对照组给予益赛普治疗,联合组在对照组基础上给予雷公藤多苷片治疗,2组均持续治疗3个月。比较2组临床疗效,治疗前后病情活动指标(晨僵时间、脊柱活动度、扩胸度)、症状及功能评分[视觉模拟评分法(VAS)评分、BASDAI、Bath强直性脊柱炎功能指数(BASFI)]、实验室指标[血清白介素(IL-17)、BMP-2],以及不良反应。结果 联合组治疗总有效率为92.50%,高于对照组的72.50%(χ^(2)=5.541,P=0.019)。治疗3个月后,2组患者晨僵时间短于治疗前,脊柱活动度、扩胸度大于治疗前,且联合组变化幅度大于对照组(P<0.01);2组患者VAS、BASDAI、BASFI评分均低于治疗前,且联合组低于对照组(P<0.01);2组患者血清IL-17、BMP-2水平均低于治疗前,且联合组低于对照组(P<0.05或P<0.01)。联合组不良反应总发生率为2.50%,低于对照组的20.00%(χ^(2)=4.507,P=0.034)。结论 雷公藤多苷联合益赛普治疗AS效果显著,可有效缩短晨僵时间,改善脊柱活动度,降低关节损伤及疼痛程度,减轻机体炎性反应,缓解病情,且安全性高。

Sliding wear behaviors of Nomex fabric/phenolic composite under dry and water-bathed sliding conditions

A Nomex fabric/phenolic composite was prepared,and its tribological properties were evaluated under dry and water‐bathed sliding conditions by a pin‐on‐disk tribometer.The resulting size of the friction coefficient for the Nomex fabric/phenolic composite in the study occurred in the following order:dry sliding condition>distilled water‐bathed sliding condition>sea water‐bathed sliding condition.The fabric composite’s wear rate from high to low was as follows:distilled water‐bathed sliding condition>sea water‐bathed sliding condition>dry sliding condition.Under water‐bathed sliding conditions,penetration of water into the cracks accelerated the composite’s invalidation process,resulting in a higher wear rate.We also found that the extent of corrosion and transfer film formed on the counterpart pin significantly influenced the wear rate of the Nomex fabric composite.Discussion of the Nomex fabric composite’s wear mechanisms under the sliding conditions investigated is provided on the basis of the characterization results.

Genuine entanglement under squeezed generalized amplitude damping channels with memory

We study genuine entanglement among three qubits undergoing a noisy process that includes dissipation, squeezing,and decoherence. We obtain a general solution and analyze the asymptotic quantum states. We find that most of these asymptotic states can be genuinely entangled depending upon the parameters of the channel, memory parameter, and the parameters of the initial states. We study Greenberger–Horne–Zeilinger(GHZ) states and W states, mixed with white noise,and determine the conditions for them to be genuinely entangled at infinity. We find that for these mixtures, it is possible to start with a bi-separable state(with a specific mixture of white noise) and end with genuine entangled states. However, the memory parameter μ must be very high. We find that in contrast to the two-qubit case, none of the three-qubit asymptotic states for n → ∞ are genuinely entangled.

Dynamics of a Quantum Dissipative System Coupled with an Oscillator

We study the dynamics of a quantum dissipative system. Besides its linear coupling with a harmonic bath modelling the dissipation, we suppose that it is coupled with an oscillator with an interaction of the form s 2 x 2 . In our study, we integrate over the bath and the oscillator, extract the corresponding influence functionals and then solve the system’s sign problem. We apply the theory to the case of a double well and study the time evolution of the expectation value of the position.

六藤安脊汤联合柳氮磺吡啶治疗活动期肾虚瘀阻型强直性脊柱炎临床研究

目的:观察六藤安脊汤联合柳氮磺吡啶治疗活动期肾虚瘀阻型强直性脊柱炎(AS)的临床疗效与安全性。方法:选择活动期肾虚瘀阻型AS患者66例,随机分为观察组和对照组各33例。观察组患者口服六藤安脊汤和柳氮磺吡啶,对照组患者口服模拟中药汤(焦糖)和柳氮磺吡啶,两组均治疗12周。比较两组患者主要疗效指标、次要疗效指标、西医AS评估工作组(ASAS)疗效、中医证候疗效及不良反应情况。结果:①治疗后,两组主要疗效指标水平较治疗前均明显改善(P<0.05或P<0.01),且观察组Bath强直性脊柱炎病情活动指数、Bath强直性脊柱炎功能指数、脊柱痛评分、夜间痛评分、患者对病情总体评分、中医证候积分均低于对照组(P<0.01)。②治疗后,两组次要疗效指标中的胸廓活动度、脊柱活动度、Schober试验体征、指地距及红细胞沉降率、C反应蛋白(CRP)水平较治疗前均明显改善(P<0.05或P<0.01),且观察组胸廓活动度、脊柱活动度、Schober试验体征、指地距、CRP水平均优于对照组(P<0.05或P<0.01)。③观察组ASAS疗效和中医证候疗效均优于对照组(P<0.05),且观察组未见不良反应。结论:六藤安脊汤联合柳氮磺吡啶治疗活动期肾虚瘀阻型AS疗效确切,安全性较高。

新型细胞因子白细胞介素-38在强直性脊柱炎患者中的表达变化及临床意义

目的探讨新型细胞因子白细胞介素-38(IL-38)在强直性脊柱炎(AS)患者中的表达变化及临床意义。方法选取2023年1月至5月九江市第一人民医院收治的80例AS患者设为观察组,80例健康体检者作为对照组,检测调节性T细胞(Treg)细胞和辅助性T细胞17(Th17)细胞比率、IL-38、白细胞介素-17(IL-17)、白细胞介素-10(IL-10)、C反应蛋白(CRP)、红细胞沉降率(ESR),比较两组IL-38、IL-17、IL-10、CRP、ESR水平和Th17、Treg细胞比率,分析IL-38水平与Th17、Treg细胞比率和IL-17、IL-10、CRP、ESR之间的相关性,并记录AS患者巴氏Bath强直性脊柱炎病情活动指数(BASDAI)、强直性脊柱炎病情活动度(ASDAS)评分,分析其与IL-38之间的相关性。结果观察组IL-17、CRP、ESR、Th17细胞比率高于对照组,IL-38、Treg细胞比率、IL-10低于对照组,差异有统计学意义(P<0.05);IL-38水平与AS患者IL-17、CRP、ESR、Th17细胞比率呈负相关,与Treg细胞比率、IL-10呈正相关(P<0.05);AS患者BASDAI评分为(3.50±1.11)分,ASDAS评分为(2.96±0.67)分。IL-38与AS患者BASDAI、ASDAS评分均呈负相关(P<0.05)。结论AS患者中IL-38水平降低,其与患者病情活动、炎症活动指标密切相关,可能参与疾病发生与进展。

间接灸联合补肾祛瘀通督丸治疗强直性脊柱炎的疗效观察

目的观察间接灸联合补肾祛瘀通督丸治疗强直性脊柱炎(ankylosing spondylitis,AS)的临床疗效。方法将90例AS患者随机分为治疗组和西药组,每组45例。治疗组给予任督周天药酒灸联合口服补肾祛瘀通督丸治疗,西药组给予常规西药口服。观察两组治疗前后Bath强直性脊柱炎病情活动指数(Bath ankylosing spondylitis disease activity index,BASDAI)和Bath强直性脊柱炎功能指数(Bath ankylosing spondylitis functional index,BASFI)评分、枕墙距、Schober试验指标(脊柱活动度)、血沉(erythrocyte sedimentation rate,ESR)及血清C反应蛋白(C-reactive protein,CRP)水平变化,并比较两组临床疗效和不良反应发生率。结果治疗后,两组BASDAI评分、BASFI评分、枕墙距、ESR、血清CRP水平均较治疗前降低(P<0.05),脊柱活动度大于治疗前(P<0.05);治疗组以上指标均优于西药组(P<0.05)。治疗组的总有效率为88.9%,明显高于西药组的73.3%(P<0.05)。两组不良反应发生率比较,差异无统计学意义(P>0.05)。结论间接灸联合补肾祛瘀通督丸治疗AS,可以降低疾病活动度,缓解疼痛程度,提高脊柱功能,降低炎症指标水平,效果优于西药治疗。

Efficient Body-Transfer Wheelchair for Assisting Functionally Impaired People

Functionally impaired people always have difficulty accomplishing activities of daily living.In this regard,tasks including toileting and bathing have a higher prevalence rate of injuries and greater risk of falling.In this study,a body-transfer wheelchair was developed to assist people in transferring from bed to wheelchair for bathing,and toileting.The bodytransfer wheelchair is a semi-automatic wheelchair that has features such as a controlled leg and backrest,linkage commode slot,and height adjustment.The wheelchair consists of a seat and a main frame that can be detached to enable bathtub transfer.This mechanism lets the user stay on the seat while being transferred into the bathtub without any risk of falling.A linkage mechanism was developed as a part of the seat for ease of toileting.Kinematic and force analysis was conducted to calculate the force required for each actuator.It has been proved by the experimental results that the wheelchair can securely and comfortably transfer a patient from the bed to the toilet or bathtub.A survey has been conducted to evaluate the wheelchair prototype design idea.Two focus groups were chosen:one comprised of functionally impaired people,and the other comprised of caregivers.The results of the survey show that 60%of both functionally impaired people and caregivers would like to use the body-transfer wheelchair for toileting and bathing purpose.Additionally,on average 65%of both focus groups find it convenient to operate the body-transfer wheelchair independently.

Performance optimization on finite-time quantum Carnot engines and refrigerators based on spin-1/2 systems driven by a squeezed reservoir

We investigate the finite-time performance of a quantum endoreversible Carnot engine cycle and its inverse operation-Carnot refrigeration cycle,employing a spin-1/2 system as the working substance.The thermal machine is alternatively driven by a hot boson bath of inverse temperatureβ_(h)and a cold boson bath at inverse temperatureβ_(c)(>βh).While for the engine model the hot bath is constructed to be squeezed,in the refrigeration cycle the cold bath is established to be squeezed,with squeezing parameter r.We obtain the analytical expressions for both efficiency and power in heat engines and for coefficient of performance and cooling rate in refrigerators.We find that,in the high-temperature limit,the efficiency at maximum power is bounded by the analytical valueη_(+)=√sech(2r)(1-η_(C)),and the coefficient of performance at the maximum figure of merit is limited byε_(+)=√sech(2r)(1+ε_(C))/sech(2r)(1+ε_(C))-εC)-1,whereη_(C)=1-β_(h)/β_(c)andε_(C)=β_(h)/(β_(c)-β_(h))are the respective Carnot values of the engines and refrigerators.These analytical results are identical to those obtained from the Carnot engines based on harmonic systems,indicating that the efficiency at maximum power and coefficient at maximum figure of merit are independent of the working substance.

Examination of the Appropriateness of Teaching Materials for Preventing Dangers during Ablution and Bathing of Infants by Mothers and Family Members

Purpose: This study aimed to develop teaching materials to prevent the dangers of ablution and bathing infants, based on the dangerous experiences of mothers and family members, and examine their appropriateness. Methods: A total of 20 midwives and public health nurses were selected as participants. Teaching materials and anonymous self-administered questionnaires were distributed, and the participants were asked to view the teaching materials and fill in the questionnaires. Retrieval was done by mail. The teaching materials included digital content, such as videos, sounds, and characters, which incorporated dangerous situations, preventions, and innovations in ablution and bathing procedures. The analysis was conducted by simple tabulation for each survey item. The free description was coded to preserve anonymity. This study was conducted with the approval of the Research Ethics Review Board of the authors’ affiliated university. Results: The teaching materials were found to be appropriate in terms of suitability to purpose, degree of difficulty of content, ease of viewing the videos, validity of time, appropriateness of expression, and usability. Conclusions: Ablution teaching materials that are used at the present time do not focus on dangers, and to date, no resources on bathing have been used as teaching materials. The created teaching materials in this study can be viewed multiple times, and mothers and family members who are unfamiliar with ablution and bathing can acquire knowledge regarding dangers and danger prevention. The addition of specific preventive measures and countermeasures for the occurrence of danger, along with practice, would result in the development of further appropriate teaching materials to reduce danger and alleviate anxiety.

Preliminary Investigation on Zhuang Folk Medicated Bath Prescriptions:A Case Study of Hechi Region

This paper summarizes the mechanism,methods and characteristics of Zhuang folk medicated bath,as well as the composition and application of prescriptions,which provides a basis for the popularization of Chinese ethnic medicine.

Study on Factors Affecting Aerobial Plate Count in Raw Milk

[Objectives]This study was conducted to investigate the main factors affecting the aerobial plate count in raw milk.[Methods]Drinking water,medicated baths and raw milk under different storage and transportation conditions were detected for the values of aerobial plate count to analyze their effects on the aerobial plate count in raw milk.[Results]Disinfection of drinking water tanks could significantly reduce the aerobial plate count in water.The use of medicated baths before and after milking could effectively reduce the aerobial plate count and had a significant bactericidal effect.The growth of microorganisms in raw milk stored below 4℃was relatively slow.Regularly disinfecting drinking water tanks and disinfecting nipples before and after milking could reduce the aerobial plate count in the tanks and nipples.After raw milk was extruded,the temperature should decrease to 0-4℃within 2 h,and the storage time should not exceed 48 h,which could effectively control the aerobial plate count in raw milk.[Conclusions]This study provides a reference for scientific control of the aerobial plate count in raw milk.

A Comparative Study on the Bathing Cultures and the Spread of Plague Between China and the West-Taking the Spread of the Black Death in China and Europe in the 14th Century as an Example

An unprecedented catastrophe shrouded over the Chinese Empire ruled by the Yuan Dynasty and Medieval Europe-the Black Death during the 14th century with rapid spread,widespread impact,serious damage to property,and substantial deaths and injuries.In the aftermath of the Black Death,lifestyle changes were made and more sensible bathing habits evolved.In feudal China,Bathing Culture had variously adapted to each dynasty;while its existence in the West was heavily influenced by religion and other factors.In the post-pandemic era,this paper is dedicated to exploring the possible relevance of Bathing Cultures to the Black Death,and to conducting a comparative study of the plague spread in Yuan and Europe and its impact on ethnic Bathing Cultures,reckoning to present informative information to regular prevention and control of the following pandemics.

督灸疗法对强直性脊柱炎功能改善的临床研究

目的:观察督灸疗法对强直性脊柱炎患者关节功能的影响。方法:选取120例强直性脊柱炎患者,按随机数字表法分为干预组及对照组各60例。对照组给予常规治疗护理,干预组在此基础上实施督灸疗法干预。观察2组临床疗效,比较2组干预前、干预后30 d、 90 d、 180 d Bath强直脊柱炎活动指数(BASDAI)、Bath强直脊柱炎功能指数(BASFI)、实验室检查[血沉(ESR)、C-反应蛋白(CRP)、肿瘤坏死因子-α (TNF-α)]指标值的变化。结果:干预组临床疗效总有效率为95.0%,对照组为81.7%,2组比较,差异有统计学意义(P<0.05)。2组BASDAI各项目评分采用重复测量方差分析结果显示,四个时间点的BASDAI各项目评分差异具有统计学意义(P<0.05)。2组在干预后30 d、90 d、180 d BASDAI各项目评分比较,差异均具有统计学意义(P<0.05),时间与组别存在交互效应(P<0.05)。2组BASFI指数的时间效应和组间效应差异具有统计学意义(P<0.05);BASFI评分存在时间与组间因素的交互作用(P<0.05),2组功能程度随时间的变化而趋势有所不同,干预组下降趋势大于对照组。2组ESR、CRP、TNF-α三项指标的时间效应和组间效应均有统计学意义(P<0.05),2组TNF-α存在交互作用(P<0.05),ESR、CRP、TNF-α三项指标随治疗干预时间的延长而降低。干预后90 d和180 d三项指标水平差异均具有统计学意义(P<0.05)。结论:在常规治疗基础上进行督灸疗法治疗效果更为显著,可改善关节功能及疾病活动度,增强疗效。

铁路信号继电器触簧系统冲击特性应用研究

本文以铁路信号继电器为研究对象,针对最容易发生冲击形变的触簧部件,建立了铁路信号继电器触簧系统刚柔耦合结构的冲击特性物理模型,由于触簧结构中簧片形变和触头接触都具有高度的非线性的特征,再加上冲击作用的瞬时性特点,导致了传统算法求解时很容易出现震荡失稳的现象,因此很难保证冲击计算时的能量守恒和收敛性。本文将Bathe复合时间积分算法应用到触簧系统的冲击计算求解中,解决了传统算法求解时出现震荡失稳的问题,并以触点接触力作为触头冲击抖断的判据,得到了铁路信号继电器触簧系统在冲击环境下的动态特性和冲击加速度的临界峰值,并对不同推动力作用下的冲击特性进行了分析。经实验验证本研究具有较好的准确度和可靠性,可为机械冲击条件下铁路信号继电器触点接触失效或误动作问题的解决提供重要的参考作用。

光电经纬仪转台动态特性研究

光电经纬仪转台的动态特性对经纬仪瞄准与跟踪性能有重要影响。针对某型号经纬仪展开研究,基于3D Solid单元建立了有限元模型,采用Bathe子空间迭代法对转台进行了模态分析,获取了转台前6阶模态。进行了力锤激励模态测试实验,仿真结果与实验结果误差在12%以内。基于隐式积分法对经纬仪进行了扫频分析,结果表明,该型号经纬仪转台对350 Hz激励最为敏感。研究结果为经纬仪转台结构改进提供了指导,并为控制系统的带宽设计提供了依据。