基于Climate Consultant软件的传统徽派民居气候适应性分析

采用Climate Consultant气候分析软件,结合黄山市气象数据(CSWD)和建筑室内外温湿度实测数据,进行建筑与气候适应性分析,根据焓湿图得到黄山市建筑室内的舒适程度以及最佳被动策略。利用PMV-PPD对室内环境进行评价,总结传统徽派民居在该气候条件下的舒适性优势及缺陷,并针对夏季炎热、冬季寒冷和空气潮湿问题提出应对策略,为当地新建民居的气候适应性设计提供理论参考。

孤岛微电网多虚拟同步发电机频率无差协调控制策略

传统虚拟同步发电机的频率控制为有差控制,且虚拟惯量的引入使得虚拟同步发电机呈现二阶振荡特性,导致孤岛微电网多虚拟同步发电机并联系统在受到负荷扰动时面临频率偏移和有功超调的问题。针对此,提出了一种多虚拟同步发电机频率无差协调控制方法。该方法包含了兼具有功精确分配的频率无差调节控制和阻尼改进控制两部分,通过利用母线频率全局一致的“通信”效果,以分散式的形式协调系统内各台虚拟同步发电机,可主动消除微电网频率稳态偏差且实现各台虚拟同步发电机按照容量承担负荷有功功率,并抑制系统的有功超调。最后,通过仿真和实验验证了所提控制方法的有效性。

凋亡抑制基因c-FLIPs对人肺腺癌细胞增殖和凋亡的作用

目的:探讨过表达凋亡抑制基因c-FLIPs重组腺病毒对人肺腺癌细胞增殖和凋亡的作用。方法:构建过表达凋亡抑制c-FLIPs的重组腺病毒Ad5 c-FLIPs,感染人肺腺癌细胞Calu-3。Real-time PCR检测感染前后c-FLIPs、Caspase-8,Caspase-10和Bcl-2的表达。MTT法检测细胞增殖。流式细胞仪检测感染Ad5 c-FLIPs后人肺腺癌细胞的凋亡情况。结果:成功构建过表达c-FLIPs重组腺病毒Ad5 c-FLIPs,real-time PCR检测凋亡抑制基因c-FLIPs在Calu-3细胞株高表达,过表达c-FLIPs基因,凋亡相关基因Caspase-8、Caspase-10和Bcl-2的表达明显降低。MTT法检测感染前后细胞增殖情况发现,过表达cFLIPs基因可诱导细胞增殖,流式细胞仪分析经PI染色后的Calu-3细胞株,对照组和腺病毒感染组细胞的凋亡率分别为(55.17±9.68)%和(10.97±1.66)%,差异具有统计学意义(P<0.05)。结论:凋亡抑制基因c-FLIPs可明显诱导人肺腺癌细胞增殖并抑制凋亡。

Preliminary Analysis of Influencing Factors of Low Visibility on a Hazy Day in Winter in Binzhou City

Based on the monitoring data of visibility,particulate matter（ PM2. 5 and PM10） and atmospheric pollutants（ SO2,NO2,CO,and O3）,and meteorological factors（ temperature,humidity,and wind speed） at the six automatic air monitoring stations in Binzhou City from December 2016 to February 2017,the correlations between visibility and influencing factors were analyzed to study the main influencing factors of atmospheric visibility. The results showed that the daily average concentration of particulate matter negatively correlated with atmospheric visibility,and the correlation between PM2. 5 concentration and atmospheric visibility was more obvious than that of PM10 concentration. Among atmospheric pollutants,the daily average concentration of CO,NO2 and SO2 also negatively correlated with atmospheric visibility,while there was a positive correlation between visibility and the daily average concentration of O3. Daily average temperature and wind speed positively correlated with visibility,while relative humidity negatively correlated with visibility. Wind speed,relative humidity and PM2. 5 had strong correlation with visibility,and the linear correlation coefficient R2 was 0. 501 6,0. 446 6,and 0. 205 8 respectively,so wind speed,relative humidity,and PM2. 5 were the main factors influencing the decrease of atmospheric visibility on a hazy day in winter.

Effects of Long-term Fertilization on Phosphorus Accumulation and Migration in Purple Soil

Based on a long-term location test lasting for 20 years, the accumulation and migration of phosphorus in purple soil was studied. The results showed that P2Os input in paddy-upland rotation was 120.0 kg/（ hm2 · a） （a conventional level of phosphorus application）, and P had a surplus of 53.9 kg/（hm2 · a）. Phosphorus accumulating in soil increased available phosphorus （Olsen-P） content, and the positive correlation between P changing balance and Olsen-P change in wheat-rice rotation was extremely significant. The mixed application of organic fertilizer and chemical P fertilizer can speed up accumulation of available phosphorus in soil. Olsen-P content in all treatments with P fertilizer was higher in 0 -60 cm soil than that of treatments without P fertilizer, and Phosphorus applied in surface soil moved to soil at a depth of 60 cm, increasing risk of P leakage and loss. The migration of phosphorus in soil is affected by P input, type of organic fertilizer and planting method. The quantities of phosphorus moving down increased with the increase of P input, and the application of pig manure can lead to migration of phosphorus in soil more easily compared with straw. The migration of phosphorus from soil to water mainly occurred in the first ten days after rice was transplanted, and paddy field drainage should not be conducted in the first 30 days after rice was transplanted.

Adsorption Ability of Green Plants to Heavy Metals in the Atmosphere of Binzhou City

Through exploring the cumulative contents of Pb, Cu and Cd, the 3 common heavy metals in air pollution, in leaves of some widely-applied green plants in different functional areas in urban districts of Binzhou City, this paper figured out its relationship with functional areas in the city, and whether green plants are selective in adsorbing heavy metals or not. The research found that cumulative content of Cu and Cd varied greatly in leaves of the same species in different functional areas, and also in leaves of different species in the same area. Populus tomentosa and Sophora japonica had the strongest capacity of adsorbing Pb, Cu and Cd in the air, which is a useful reference for the urban landscaping of Binzhou City.

一流本科专业建设背景下地下建筑工程毕业论文(设计)教改探索

毕业论文(设计)是本科教育的最后一个教学环节,也是衡量本科教学质量的重要评价内容。在一流本科专业建设和地下工程行业发展对人才培养提出新要求的背景下,结合中国地质大学(武汉)地下建筑工程专业本科毕业论文(设计)的基本情况和存在的问题,从学生、教师和管理三方面对提升毕业论文(设计)质量进行了探索与实践。

彩色多普勒超声联合甲状腺功能检测在桥本甲状腺炎诊断中的应用

目的探讨彩色多普勒超声联合甲状腺功能检测在桥本甲状腺炎(HT)诊断中的应用价值。方法回顾性分析2021年1月至2022年1月于贵州航天医院就诊的126例疑似HT患者的临床资料,患者均进行彩色多普勒超声检查、甲状腺功能指标[甲状腺过氧化物酶抗体(TPOAb)、抗甲状腺球蛋白抗体(TgAb)]检测,以临床或病理诊断为金标准,比较彩色多普勒超声、甲状腺功能指标及联合检查HT的诊断效能,采用Kappa检验评估各检查方法与金标准的一致性,评估其诊断效能。结果126例疑似HT的患者经临床或病理检查,最终确诊110例。110例HT患者的TPOAb水平为(303.46±74.43)IU/ml,TgAb水平为(39.06±10.12)%。彩色多普勒超声检查诊断HT的灵敏度为88.18%、特异度为87.50%、准确度为88.10%,与金标准一致性Kappa值为0.585;TPOAb检查诊断HT的灵敏度为74.55%、特异度为81.25%、准确度为75.40%,与金标准一致性Kappa值为0.335;TgAb检查诊断HT的灵敏度为75.45%、特异度为87.50%、准确度为76.98%,与金标准一致性Kappa值为0.378;联合诊断HT的灵敏度为98.18%、特异度为87.50%、准确度为96.83%,与金标准一致性Kappa值为0.857,以上各种方法诊断HT的效能:联合检查诊断灵敏度、准确度及阴性预测值高于其他3种诊断方式(P<0.05)。结论与单一彩色多普勒超声或甲状腺功能检查比较,彩色多普勒超声联合甲状腺功能检测诊断效能更高,有助于临床医师鉴别诊断,改善患者预后。

新工科理念下工程地质学课程教学模式探索和实践

在新工科背景下,将课程教学目标由低到高依次设计为知识能力目标、应用能力目标、职业能力目标、创新能力目标、工程实践能力目标、跨学科能力目标、工程伦理能力目标,探索“以学生为中心”的土木工程专业地下建筑工程方向工程地质学课程教学模式。为了达成课程教学目标,从课程内容设计、教学活动组织、考核方式改进等方面进行了探索和实践,采用逐步提升的方式,将对学生能力的培养贯穿整个教学过程,并从期末考试成绩和课程教学效果的角度对能力培养达成度进行评价。结果表明,学生的综合素质和地质素质有一定的提升,该教学模式值得继续推行和更深入地研究。

多重耐药菌感染肺炎患者巨噬细胞表型、血清炎症因子水平变化与治疗预后的相关性

目的探究不同预后的多重耐药菌感染肺炎患者巨噬细胞表型、血清炎症因子水平特征并分析与预后的相关性。方法选取2023年1月-10月在我院就诊的101例多重耐药菌感染肺炎患者作为研究对象。根据患者确诊及治疗后1个月内预后情况划分为预后良好组(n=71)和预后不良组(n=30)。对比两组患者间一般临床资料、入院时常规临床检验指标[白细胞(WBC)、中性粒细胞计数(NEU)、淋巴细胞计数(LYM)、血红蛋白(Hb)、D-二聚体(D-D)]、有创操作情况(通气方式、是否留置胃管、是否留置尿管、是否深静脉置管)、巨噬细胞表型和血清炎症因子[白细胞介素(IL)-1β、IL-6、IL-10、肿瘤坏死因子α(TNF-α)、降钙素原(PCT)、C-反应蛋白(CRP)]的表达水平差异。通过Spearman相关性检验与多因素Logistic回归分析筛选多重耐药菌感染肺炎患者预后不良的危险因素。结果预后不良组患者平均WBC、NEU水平均显著高于预后良好组患者,平均Hb水平显著低于预后良好组患者(P<0.05);平均M1型巨噬细胞比例、M1/M2比值均显著高于预后良好组患者,平均M2型巨噬细胞比例显著低于预后良好组患者(P<0.05);平均血清IL-1β、PCT水平均显著高于预后良好组患者,平均血清IL-10水平显著低于预后良好组患者(P<0.05);Spearman相关性分析及多因素Logistic回归分析发现多重耐药菌感染肺炎患者M1型巨噬细胞比例较高、M1/M2比值较高、血清IL-1β水平较高、PCT水平较高、M2型巨噬细胞比例较低、血清IL-10水平较低均是不良预后的独立危险因素(P<0.05)。结论多重耐药菌感染肺炎患者巨噬细胞分型及炎症水平与预后不良存在显著相关性,其中M1型巨噬细胞增多、促炎性细胞因子升高、M2型巨噬细胞减少及抗炎性细胞因子降低均是评估不良预后的重要生物学指标,对于预测患者临床结局具有一定意义。

内蒙古通辽农村牧区民居外围护结构的节能改造研究

为改善内蒙古通辽农村牧区民居的室内热环境、降低能耗,以三栋代表性民居为研究对象,实测冬季室内外温度并分析民居存在的节能问题。对影响能耗的外墙保温、屋面保温、外窗类型等因素进行单因素节能改造和正交实验组合节能改造,采用极差法探究各因素对实验指标的影响程度,并结合节能率和经济性分析选出最佳方案。研究表明,对三栋民居影响程度较大的是外墙保温,最佳改造方案为外墙为50 mm厚EPS保温板,屋面为60 mm厚EPS保温板,外窗为6 mm+12 A+6 mm的普通中空玻璃,改造后三栋民居的全年累计热负荷分别降低了53.58%、45.05%、43.55%。研究结果可为内蒙古通辽农村牧区民居室内热环境的改善提供依据、为民居外围护结构节能改造提供参考。

Fluorescence Decay Lifetime of Ultrafine CdS and ZnS Particles

The fluorescence decay properties of CdS and ZnS ultrafine particles have been investigated by a single photon counting technique.We have found that the decay is dependent on the particle size,emission wavelength and colloidal sandwich structure.Shorter emission lifetimes were observed for smaller CdS particles and at shorter emission wavelength.The average emission lifetime of ZnS part in the sandwich structure of ZnS and CdS particles clearly decreased.

基于“玄府-神机”探析“风药通玄达神”治疗重症肌无力

分重症肌无力(myasthenia gravis,MG)是一种神经-肌肉接头(neuromuscular junction,NMJ)处传递功能障碍的自身免疫病,以骨骼肌诸肌群异常无力、肌力减退为主症,呈发病部位与时相多变的特点。MG与中医学“睢目”、“胞垂”、“睑废”、“痿证”等病证类似,累及中医学筋骨肉等组织结构,传统多从肝肾脾等脏辨治。本文基于玄府学术思想及风药理论的发展,从“玄府-神机”“风药通玄达神”探讨MG的中医学生理病理基础及治疗,以期为MG的中医病机认识及诊疗提供新的思路。

Suitability and Construction of Self-Insulation Walls in the Hot Summer and Cold Winter Zone of Southern Shaanxi

In this paper, the suitability and construction technology of self-insulation walls were studied under the specific climatic conditions and regional resources of Hanzhong and Ankang in the hot summer and cold winter zone of Southern Shaanxi. Through the calculation of heat transfer coefficient and thermal inertia index, combined with the specifications of the shale hollow brick and aerated concrete block of Hanzhong and Ankang in southern Shaanxi, the thermal performance and suitable thickness of the external wall using self-insulation materials that meet the Design Standard for Energy Efficiency of Residential Buildings(DBJ61-65-2011) in Shaanxi Province were obtained. The results showed that the self-insulation wall had technical suitability in the hot summer and cold winter zone. The research results provide not only a theoretical basis for the external wall insulation design of urban residential buildings in the hot summer and cold winter zone of southern Shaanxi, but also a reference for designers to carry out energy-saving design of external walls of residential buildings in other similar climate zones.

Geological Disaster Evaluation of the Xixi Watershed of the Jinjiang River Based on the Coupling of Landscape and Multiple Factors

Six evaluation factors were selected to evaluate the susceptibility level of the Xixi Watershed to geological disasters such as collapse and landslide, namely formation lithology, rainfall, gradient, aspect, vegetation and buffer zone. The results showed that Longmen Town, Gongqiao Town, Lianhua Town, and Chengxiang Town in the lower reaches of the Xixi Watershed were more susceptible to geological disasters in case of rainstorm because of the easily-collapsed formation lithology; riverbank erosion by runoff was enhanced during rainstorm, thus both sides of the rivers in Chengxiang Town at the estuary of the Xixi Watershed were most susceptible to geological disasters; in case of rainstorm, geological disaster monitoring in location areas of Longmen Town, Guanqiao Town, Lianhua Town, Chengxiang Town in the lower reaches, particularly trunk streams in Chengxiang Town, should be enhanced. By evaluating environmental geo-disasters of the Xixi Watershed, the blank in the environmental geo-disaster evaluation of the local area will be filled in, and scientific support will be provided for the future prevention of environmental geodisaster.

2—甲苯缩水甘油醚协同提升环氧复合物韧性及刚性研究

电气及电子设备集成度的不断提高,对环氧复合物的热学与力学综合性能提出了更高需求。环氧复合物的耐热性能、刚性与韧性三者之间存在“跷跷板”现象,难以协同提升。该文提出将六氢邻苯二甲酸酐/四氢邻苯二甲酸酐/邻苯二甲酸酐3种固化剂复配提升环氧复合物热学性能,并采用2—甲苯缩水甘油醚协同提升环氧复合物韧性及刚性的方法。研究表明:固化剂复配的方法将环氧复合物的玻璃化转变温度Tg及热分解温度T5%分别提升了17.93%、7.72%;2—甲苯缩水甘油醚改性使得环氧复合物冲击强度和弯曲强度分别提升了123.03%、61.71%。采用分子动力学模拟,从分子角度揭示了2—甲苯缩水甘油醚提升环氧固化物性能的机理,其刚性苯环基团增强了环氧体系分子结构稳定性,柔性—C—O—C—链段改善了交联体系柔韧性。该研究提出一种不降低环氧复合物热学性能,并协同提升其韧性与刚性的可行方法,可为具备高综合热学与力学性能环氧复合物配方的设计提供新思路。

基于主成分和聚类分析的云南文山典型石漠化区土壤肥力分析

对云南砚山县和西畴县典型石漠化区土壤肥力状况进行丰缺诊断和综合肥力评价,以期为研究区域土壤品质提升提供科学依据。测定土壤pH、有机质、碱解氮、有效磷、速效钾、电导率6个土壤肥力指标,对土壤肥力指标变化规律进行分析,通过主成分分析计算土壤肥力综合得分,应用系统聚类法对土壤肥力进行分类。结果表明,研究区域土壤有效磷含量属于中等偏下水平,碱解氮含量属于高水平。采用主成分分析将土壤肥力指标提取为3个主成分,可反映土壤全部信息的80.52%。第一主成分以有机质和pH贡献大,第二主成分以速效钾、碱解氮、有效磷贡献大,第三主成分以电导率贡献大。土壤综合肥力可分为2类,第一类土壤综合肥力属于中等水平,第二类土壤综合肥力水平较低。总而言之,云南砚山县和西畴县典型石漠化区土壤综合肥力属于中低水平,土壤有效磷、有机质和pH是影响土壤综合肥力高低的关键因子,需加强土壤养分管理,合理施肥,提升土壤综合肥力水平。

基于虚拟惯量模糊自适应的新能源逆变器频率主动支撑策略

新能源通过逆变器大规模接入孤岛微电网,导致系统惯量水平持续下降,系统频率面临严峻的失稳风险。针对此问题,提出了一种基于虚拟惯量模糊自适应的新能源逆变器频率主动支撑控制方法,利用新能源逆变器直流侧电容主动支撑系统频率。首先,通过在新能源逆变器控制回路中引入基于模糊控制的新能源逆变器直流侧电容电压-系统频率耦合的功率控制项,使直流侧电容具备与同步发电机相似的惯性响应。然后,计及频率响应过程对虚拟惯量的差异化需求,设计模糊控制规则,根据频率波动区间自适应调整新能源逆变器直流电容附加虚拟惯量,以减缓系统频率偏移速度,改善系统频率极值,并加快系统频率恢复速度。其次,通过构造李雅普诺夫能量函数证明了采用所提控制方法后系统的稳定性。最后,仿真和实验验证了所提控制方法的有效性。

中国科研门诊现状分析及开设循证门诊的探索——以重庆医科大学附属儿童医院为例

目的 探讨科研门诊背景下,循证门诊的运行模式和实际效果。方法 2023年2月,重庆医科大学附属儿童医院开设了科研门诊,并开放特色分支门诊——循证门诊,该门诊由循证医学及指南方法学家“坐诊”,通过运用循证研究方法,重点解决咨询者在临床研究设计、指南与共识制订与评价、系统评价与Meta分析制作与应用等方面的问题。结果截至2023年12月,循证门诊共开展科研咨询服务14次,为来自院内17个科室的28位院内人员提供方法学指导,初步取得了良好成效。结论 循证门诊的建立为促进中国科研门诊的学科多样性、提高医院科研水平提供了参考,通过提供有价值、基于循证的方法学支持,帮助临床工作者提升科研质量。

风电机组高塔一阶涡激振动特性研究

针对风力发电机组钢制高塔的涡激振动问题,采用固体-流体相结合的仿真方法对停机状态的塔架一阶涡激振动特性进行研究。首先以某2.5 MW、140 m高塔机组为研究对象,建立塔架-叶片耦合结构仿真模型,利用模态和CFD仿真分析塔架一阶涡激振动的共振频率和共振风速范围,表明该风电机组塔架存在发生一阶涡激振动的风险;然后提出一种基于固体-流体迭代快速仿真一阶涡激振动最大位移计算方法,考虑叶片对塔架涡激振动的耦合作用,得到最大振动位移。现场测试表明实测最大一阶涡激振动位移与仿真结果基本相符,验证了该仿真方法的准确性。