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深圳城中村私宅租金与统租改造选址的空间交互影响

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地理研究 2024年第1期43卷 136-148页

作者：仝德任一帆邱君丽沈月李汉廷北京大学深圳研究生院城市规划与设计学院深圳518055 北京大学深圳研究生院超大城市空间治理政策模拟社会实验中心深圳518055

城中村是中国大城市普遍存在的居住空间类型。近年来,随着大拆大建的改造模式备受诟病,以统租改造为手段的综合整治行动迅速兴起,但其空间效应仍较少被检视。本文以深圳为研究区,构建空间联立方程,探究城中村私宅租金和统租改造选址的... 详细信息

城中村是中国大城市普遍存在的居住空间类型。近年来,随着大拆大建的改造模式备受诟病,以统租改造为手段的综合整治行动迅速兴起,但其空间效应仍较少被检视。本文以深圳为研究区,构建空间联立方程,探究城中村私宅租金和统租改造选址的空间交互影响。结果表明:①城中村发生统租改造,会带动本村未改造私宅租金上涨,产生一定程度的绅士化效应。②在控制其他变量的前提下,私宅租金相对较高的城中村更易发生统租改造。③统租改造具有空间溢出效应,通过租金传导机制带动邻村发生统租改造,促进绅士化效应在邻村扩散。因此,在健康可支付住房短缺的大城市,建议地方政府科学规划城中村私宅统租改造的选址,引导城中村统租改造为不同类型、不同价格梯度的租赁住房,建立租金监管机制,积极介入当前以市场为主导的城中村统租改造行为,更加稳妥地推进城中村统租改造。

关键词：城中村统租改造选址租金深圳

ST-Segment Elevation Myocardial Infarction Patients Complicated by Out-of-Hospital Cardiac Arrest May Not Benefit from Emergency Percutaneous Intervention

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Chinese Medical Journal 2018年第6期131卷 746-747页

作者： Kun Wang Yu shen Pei-Wen Li rong Go Jing-Mei Zhang Lian Wang Jian Bai Biao Xu Department of Cardiology Drum Tower Hospital of Nanjing Medical University Nanjing Jiangsu 210008 China

To the Editor： Out-of-hospital cardiac arrest （OHCA） of cardiac origin is one of the leading causes of death in the industrialized world. The American Heart Association recommended patients who have been successfully resuscitated from OHCA and whose initial electrocardiogram （ECG） showing ST-segment elevation myocardial infarction （STEMI） should undergo emergent cardiac catheterization with the intent to identify and revascularize the culprit lesion by percutmleous intervention （PCI） when clinically applicable. However, few recent retrospective studies and prospective registries observed a beneficial effect of emergency coronary angiography and PCI on the outcome of resuscitated patients with OHCA.

关键词： CORONARY INTERVENTION IMPACT

Flavonoid-producing tomato plants have a direct negative effect on the zoophytophagous biological control agent Oriussauteri

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Insect Science 2023年第1期30卷 173-184页

作者： Fengbo Yang Xinyi Zhang Haowei shen Hu Xue Tian Tian qinghe Zhang Jinyu Hu Hong Tong Youjun Zhang qi Su Hubei Engineering Technology Center for Forewarning and Management of Agricultural and Forestry Pests College of AgricultureYangtze UniversityJingzhouHubei ProvinceChina Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBejingChina

Orius sauteri(Poppius)(Hemiptera:Anthocoridae)is often used for biological control of small arthropod pests in greenhouse vegetable production systems in *** addition to feeding on arthropod prey,*** consumes small quantities of plant *** studies demonstrated that tomato plant chemistry confers antixenosis resistance to phloem-feeding whiteflies,but the potential nontarget effects of phytochemicals on the beneficial predator *** are *** of *** confined to near-isogenic lines(NILs)of tomatoes producing high levels offlavonoids(NIL-purple hypocotyl;resistant to whiteflies)and low levels of flavonoids(NIL-green hypocotyl;susceptible to whiteflies)revealed that *** had reduced oviposition,nymphal survival,and development on resistant plants,even if they were also provided with prey that did not feed on the host ***,*** showed a significant ovipositional preference in choice assays,laying significantly more eggs on susceptible than on resistant *** gut content analysis using the specific chloroplast trnL gene from tomato confirmed that adult and immature *** feed on both resistant and susceptible genotypes,and feeding behavior assays revealed that resistance did not affect plant feeding or prey acceptance by *** *** results demonstrate a direct negative effect of phytochemicals on a nontarget beneficial species and indicate that resistance mediated by phytochemicals can affect organisms that do not solely feed on phloem *** results also indicate that the mode of action and the potential ecological effects of phytochemicalmediated resistance are broader than previously recognized.

关键词： biological control host plant resistance insect resistance integrated pest management natural enemy phytochemistry

Fluidization of micro-interconnected fluidized beds for chemical looping

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Particuology 2021年第1期19卷 136-145页

作者： Tianxu shen Xiao Zhu Tao Song Laihong shen Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096China Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control School of Energy and Mechanical EngineeringNanjing Normal UniversityNanjing 210042China

The micro-interconnected fluidized bed(MIFB)was designed to improve the evaluation condition of oxygen carrier,which is difficult to perform in a lab-scale interconnected fluidized bed because of the large demand for bed *** reduction of bed inventory in the MIFB was mainly achieved by the appropriate miniaturization of the reactor size,in which the wall effect and operating flexibility should be taken into *** hematite serving as the oxygen carrier,stable and flexible fluidization could be realized with 342.9 g of bed *** perforated plates were arranged in the middle of the reactor to improve gas-solid distribution,which also could restrain the slugging formation and increase the particle residence time by 28.9%.A different fluidization phenomenon was observed in this two-stage reactor in which the particle fluidization was reconstructed in the upper *** 48 h of cold operation,the hematite oxygen carrier attrition rate was evaluated as 0.151 wt.%/h corresponding to 660 h lifetime,where 12.5%of particle attrition was contributed by internal perforated *** excellent fitting performance was found between the pressure difference in the risers and the upward particle flow,but the correction factor should be adjusted according to the fluidization flow.

关键词： Micro chemical-looping reactor Bed inventory Internal perforated plate Hydrodynamics

Effect and mechanism of carbon sources on phosphorus uptake by microorganisms in sequencing batch reactors with the single-stage oxic process

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Science China Chemistry 2009年第12期52卷 2358-2365页

作者： WANG DongBo LI XiaoMing YANG qi ZHENG Wei CAO JianBing ZENG GuangMing YUE Xiu shen TingTing ZENG TianJing DING Yan College of Environmental Science and Engineering Hunan UniversityChangsha 410082China

To investigate the chief reason for phosphorus uptake by microorganisms affected by substrates in sequencing batch reactors with the single-stage oxic process,two typical substrates,glucose (R1) and acetate (R2) were used as the sole carbon source,and the performances of phosphorus removal and the changes of intracellular storage were compared. The experimental results showed that the phenomenon of excess phosphorus uptake was observed in two reactors,but bacteria's capability to take in phosphorus and its intracellular storage were obviously different under the same operational condition. After steady-state operation,total phosphorus (TP) removed per MLVSS in R1 and R2 was 6.7―7.4 and 2.7―3.2 mg/g,respectively. The energy storage of poly-β-hydroxyalkanoates (PHA) was nearly constant in R1 during the whole period,and another aerobic storage of glycogen was accumulated (the max accumulation of glycogen was 3.21 mmol-C/g) when external substrate was consumed,and then was decreased to the initial level. However in R2,PHA and glycogen were both accumulated (2.1 and 0.55 mmol-C/g,respectively) when external substrate was consumed,but they showed different changes after the period of external consumption. Compared to rapid decrease of PHA to the initial level,glycogen continued accumulating to the peak (0.88 mmol-C/g) in 2 h of aeration before decreasing. During the aeration,the accumulations/transformations of internal carbon sources in R1 were higher than those in R2. In addition,obvious TP releases were both observed in R1 and R2 other than PHA and glycogen during the long-term idle period; moreover,the release content of phosphorus in R1 was also higher than that in R2. The researches indicated that different aerobic metabolism of substrate occurred in R1 and R2 due to the different carbon sources in influent,resulting in different types and contents of aerobic storage accumulated/translated in bacteria of R1 and R2. As a result,ATP content provided for phosphorus upt

关键词： biological phosphorus removal poly-β-hydroxyalkanoates glycogen sequecing batch reactor single-stage oxic process

基于残差网络模型的速溶全脂奶粉分散性与堆积密度检测方法

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食品科学 2024年第10期45卷 9-18页

作者：丁浩晗沈嵩谢祯奇崔晓晖王震宇江南大学未来食品科学中心江苏无锡214122 江南大学人工智能与计算机学院江苏无锡214122 武汉大学国家网络安全学院湖北武汉430072 嘉兴未来食品研究院浙江嘉兴314005

针对传统的奶粉品质国际标准检测方法中存在的主观性和滞后性等问题,本研究提出了一种基于残差网络(residual network,ResNet)的奶粉分散性和堆积密度的快速分类检测方法。在本研究中,使用的数据集包括499张在10倍光学显微镜下拍摄的速... 详细信息

针对传统的奶粉品质国际标准检测方法中存在的主观性和滞后性等问题,本研究提出了一种基于残差网络(residual network,ResNet)的奶粉分散性和堆积密度的快速分类检测方法。在本研究中,使用的数据集包括499张在10倍光学显微镜下拍摄的速溶全脂奶粉颗粒微观分布图像,这些图像来自10个不同的样本组。首先,按照国际标准方法检测这10组样本的分散性和堆积密度,进而基于测试结果划分不同的分散性和堆积密度级别。随后,利用这些微观图像对ResNet模型进行训练,以实现对不同样本的有效分类。最终,通过分类结果预测速溶全脂奶粉的分散性、松散密度和振实密度。此外,本研究还对比了ResNet、EfficientNetV2和SwinTransformer等不同深度学习模型的预测效果。结果表明,基于ResNet152的深度学习模型在预测速溶全脂奶粉的分散性、松散密度和振实密度方面表现最佳,其在测试集上的准确率分别达到97.50%、98.75%和95.00%。这些深度学习模型在奶粉品质检测中的出色性能不仅证明了该方法能够实时、准确地预测奶粉的分散性和堆积密度,同时也为奶粉品质的在线检测提供了新的技术途径。

关键词：速溶全脂奶粉分散性堆积密度深度学习残差网络

1990-2019年中国老年人肺结核疾病负担变化趋势

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疾病监测 2024年第2期39卷 189-194页

作者：高颖刘玉荣沈玉祯王媛天津医科大学天津300041 天津市滨海新区疾病预防控制中心天津300450

目的分析1990—2019年中国老年人肺结核疾病负担现状和趋势,探索老年人肺结核防治策略。方法利用2019年全球疾病负担数据,选取1990—2019年我国65~89岁老年人群肺结核的发病率、死亡率、伤残调整寿命年(DALY)、伤残损失寿命年(YLD)、过... 详细信息

目的分析1990—2019年中国老年人肺结核疾病负担现状和趋势,探索老年人肺结核防治策略。方法利用2019年全球疾病负担数据,选取1990—2019年我国65~89岁老年人群肺结核的发病率、死亡率、伤残调整寿命年(DALY)、伤残损失寿命年(YLD)、过早死亡损失寿命年(YLL)等数据,评估中国老年人群在不同时期、不同性别及不同年龄组的肺结核疾病负担情况,并与全球不同地区的结果进行对比。结果1990—2019年中国老年人肺结核的发病人数从19.63万例增加到20.45万例,增长率为4.18%,死亡人数从6.73万例减少到2.11万例,减少68.65%。年龄别发病率、死亡率以及粗发病率和死亡率均呈现下降趋势;总体年龄别标化的YLD率、YLL率及DALY率呈下降趋势(平均年度变化百分比分别为–2.83%、–7.42%、–6.64%,均P<0.05);各指标性别、年龄组构成中,75~79岁年龄组DALY率最大,85~89岁年龄组发病率及死亡率最高,男性疾病负担重于女性;老年人肺结核的年龄别标化发病率、死亡率及DALY率在各级社会发展指数(SDI)国家中处于中等水平,但与高SDI地区相比负担仍较重。结论1990—2019年中国老年人的肺结核疾病负担有所下降,但老年人群肺结核的疾病负担仍较重,男性≥75岁老年群体为重点关注对象,应采取针对性的防治措施。

关键词：老年人肺结核疾病负担变化趋势

医院感染监测系统精准手卫生干预对多药耐药菌感染的防控效果

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中华医院感染学杂志 2024年第17期34卷 2693-2697页

作者：沈小玥苏欣董维鹏戚瑾黄慧敏李亚楠尹诺方红梅东部战区总医院疾病预防控制科江苏南京210002 南京鼓楼医院呼吸与危重症医学科江苏南京210002

目的采用医院感染实时监控软件对重症监护病房(ICU)多药耐药菌(MDROs)动态监测,精准干预手卫生,观察对MDROs防控的效果。方法自2023年1月-12月在某综合性三甲医院普外科采用医院感染软件“杏林医院感染实时监控系统”对ICU患者从入院到... 详细信息

目的采用医院感染实时监控软件对重症监护病房(ICU)多药耐药菌(MDROs)动态监测,精准干预手卫生,观察对MDROs防控的效果。方法自2023年1月-12月在某综合性三甲医院普外科采用医院感染软件“杏林医院感染实时监控系统”对ICU患者从入院到出院的全程在线动态监测,一旦患者检测出MDROs感染或定值立即对相关医护人员、护工、保洁人员、患者及患者家属的手卫生进行精准干预。结果手卫生进行精准干预后,护工、患者、患者家属和医务人员手卫生依从性及手卫生合格率均明显升高(P<0.05);医院感染发病率(9.19%vs.4.47%),尤其是MDROs感染率(5.29%vs.1.26%)明显下降(P<0.05);耐甲氧西林金黄色葡萄球菌(MRSA)、耐碳青霉烯铜绿假单胞菌(CRPA)、耐碳青霉烯鲍氏不动杆菌(CRAB)和耐碳青霉烯肠杆菌(CRE)检出率下降(P<0.05),其中MRSA检出率明显下降(63.64%vs.5.56%)。结论采用医院感染实时监控软件对ICU MDROs动态监测,精准干预手卫生,可以明显提高相关医护人员、患者和患者家属、护工、保洁人员的手卫生依从性,从而使MDROs医院感染发病率降低,提升MDROs防控效果。

关键词：医院感染监测手卫生干预多药耐药菌预防与控制

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BUCKLING AND POSTBUCKLING OF LAMINATED THIN CYLINDRICAL SHELLS UNDER HYGROTHERMAL ENVIRONMENTS

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Applied Mathematics and Mechanics(English Edition) 2001年第3期22卷 270-281页

作者： shen Hui-shen(沈惠申) School of Civil Engineering and Mechanics Shanghai Jiaotong University Shanghai 200030 P R China

The influence of hygrothermal effects on the buckling and postbuckling of composite laminated cylindrical shells subjected to axial compression is investigated using a micro-to-macro-mechanical analytical model. The material properties of the composite are affected hy the variation of temperature and moisture, and are hosed on a micromechanical model of a laminate. The governing equations are based on the classical laminated shell theory, and including hygrothermal effects. The nonlinear prebuckling deformations and initial geometric imperfections of the shell were both taken into account. A boundary layer theory of shell buckling was extended to the case of laminated cylindrical shells under hygrothermal environments, and a singular peturbation technique was employed to determine buckling loads and postbuckling equilibrium paths. The numerical illustrations concern the postbuckling behavior of perfect and imperfect, cross-ply laminated cylindrical shells under different sets of environmental conditions. The influences played by temperature rise, the degree of moisture concentration, fiber volume fraction, shell geometric parameter, total number of plies, stacking sequences and initial geometric imperfections are studied.

关键词： structural stability postbuckling hygrothermal environments composite laminated cylindrical shell a boundary layer theory of shell buckling singular perturbation technique