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汽柴油升级装置的工业应用

化工科技市场 2009年第8期32卷 28-31,41页

作者：谢卫珍邹冬梅郭丽王颖李春秋中油大港石化公司天津大港300280

中油大港石化公司作为奥运期间北京市场高清洁油品的供应单位,积极进行装置改造,于2008年投产75万t/a汽油加氢脱硫装置和100万t/a蜡油加氢裂化装置,实现了汽、柴油质量升级,按时完成了供应任务。从产品质量、产品结构以及添加剂消耗等... 详细信息

中油大港石化公司作为奥运期间北京市场高清洁油品的供应单位,积极进行装置改造,于2008年投产75万t/a汽油加氢脱硫装置和100万t/a蜡油加氢裂化装置,实现了汽、柴油质量升级,按时完成了供应任务。从产品质量、产品结构以及添加剂消耗等方面对升级前后的情况进行了对比论述。

关键词：高清洁油品汽油加氢脱硫蜡油加氢裂化汽柴油升级

Magnetism of NaYbS_(2):From finite temperatures to ground state

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 92-104页

作者： weizhen Zhuo Zheng Zhang Mingtai xie Anmin Zhang Jianting Ji Feng Jin Qingming Zhang School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Rare-earth chalcogenide compounds ARECh_(2)(A=alkali or monovalent metal,RE=rare earth,Ch=O,S,Se,Te)are a large family of quantum spin liquid(QSL)candidate ***2is a representative member of the *** key issues on NaYbS_(2),particularly how to determine the highly anisotropic spin Hamiltonian and describe the magnetism at finite temperatures and the ground state,remain to be *** this paper,we conducted an in-depth and comprehensive study on the magnetism of NaYbS_(2) from finite temperatures to the ground ***,we successfully detected three crystalline electric field(CEF)excitation energy levels using low-temperature Raman scattering *** them with the CEF theory and magnetization data,we worked out the CEF parameters,CEF energy levels,and CEF *** further determined a characteristic temperature of~40 K,above which the magnetism is dominated by CEF excitations while below which the spinexchange interactions play a main *** characteristic temperature has been confirmed by the temperature-dependent electron spin resonance(ESR)***-temperature ESR experiments on the dilute magnetic doped crystal of NaYb_(0.1)Lu_(0.9)S_(2) further helped us to determine the accurate ***,we quantitatively obtained the spin-exchange interactions in the spin Hamiltonian by consistently simulating the magnetization and specific heat ***,the above studies allow us to explore the ground state magnetism of NaYbS_(2) by using the density matrix renormalization *** combined numerical calculations and experimental results to demonstrate that the ground state of NaYbS_(2) is a Dirac-like QSL.

关键词： rare-earth chalcogenide anisotropic spin Hamiltonian quantum spin liquid

维持性血液透析患者血清β-catenin水平与腹主动脉钙化的关系

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肾脏病与透析肾移植杂志 2024年第2期33卷 121-126页

作者：丁婷婷和瑞斌谢伟珍秦丽轩应利姜娜袁江姿上海交通大学医学院附属仁济医院宝山分院肾内科上海200444 上海交通大学医学院附属仁济医院肾内科

目的:探讨维持性血液透析(MHD)患者血清β-catenin水平与腹主动脉钙化(AAC)的关系。方法:选取上海交通大学医学院附属仁济医院宝山分院MHD患者70例,使用腹部侧位平片检测AAC情况,根据CORD研究分组方法,将患者分为无或轻度钙化组、中度... 详细信息

目的:探讨维持性血液透析(MHD)患者血清β-catenin水平与腹主动脉钙化(AAC)的关系。方法:选取上海交通大学医学院附属仁济医院宝山分院MHD患者70例,使用腹部侧位平片检测AAC情况,根据CORD研究分组方法,将患者分为无或轻度钙化组、中度钙化组和重度钙化组。采用ELISA法检测患者血清β-catenin水平,观察MHD患者血清β-catenin水平与AAC评分(AACS)及人口学特性和生化指标的关系。结果:本组MHD患者AAC发生率为70%。腹主动脉重度钙化组血清β-catenin水平显著高于中度钙化组、无或轻度钙化组(P<0.05);中度钙化组血清β-catenin水平亦高于无或轻度钙化组(P<0.05)。相关性分析结果显示,MHD患者血清β-catenin水平与AACS、透析龄、甲状旁腺激素、血磷成正相关。Logistic回归分析结果显示,β-catenin水平升高、高体质量指数及高C反应蛋白水平是MHD患者发生AAC的独立危险因素(P<0.05),而血清白蛋白水平升高则属于保护因素(P<0.05)。血清β-catenin预测AAC的曲线下面积(AUC)为0.864(95%CI 0.766~0.961,P=0.000),约登指数为0.693,对应血清β-catenin水平值为211.63 pg/ml,其预测AAC的灵敏度为91.70%,特异度为77.60%。结论:MHD患者血清β-catenin升高可能与AAC相关。

关键词：维持性血液透析 β-catenin 腹主动脉钙化

Self-powered and broadband opto-sensor with bionic visual adaptation function based on multilayer γ-InSe flakes

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Light(Science & Applications) 2023年第8期12卷 1675-1685页

作者： weizhen Liu Xuhui Yang Zhongqiang Wang Yuanzheng Li Jixiu Li Qiushi Feng Xiuhua xie Wei Xin Haiyang Xu Yichun Liu Key Laboratory of UV-Emitting Materials and Technology of Ministry of Education Northeast Normal University130024 ChangchunChina State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesNo.3888 Dongnanhu RoadChangchunChina

Visual adaptation that can autonomously adjust the response to light stimuli is a basic function of artificial visual systems for intelligent bionic *** improve efficiency and reduce complexity,artificial visual systems with integrated visual adaptation functions based on a single device should be developed to replace traditional approaches that require complex circuitry and ***,we have developed a single two-terminal opto-sensor based on multilayer γ-InSe flakes,which successfully emulated the visual adaptation behaviors with a new working mechanism combining the photo-pyroelectric and photo-thermoelectric *** device can operate in self-powered mode and exhibit good human-eye-like adaptation behaviors,which include broadband light-sensing image adaptation(from ultraviolet to near-infrared),near-complete photosensitivity recovery(99.6%),and synergetic visual adaptation,encouraging the advancement of intelligent opto-sensors and machine vision systems.

关键词： visual artificial multilayer

Rare-Earth Chalcogenides:An Inspiring Playground for Exploring Frustrated Magnetism

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Chinese Physics Letters 2024年第11期41卷 208-220页

作者： Mingtai xie weizhen Zhuo Yanzhen Cai Zheng Zhang Qingming Zhang School of Physical Science and Technology Lanzhou UniversityLanzhou 730000China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

The rare-earth chalcogenide ARECh_(2) family(A=alkali metal or monovalent ions,RE=rare earth,Ch=chalcogen)has emerged as a paradigmatic platform for studying frustrated magnetism on a triangular *** family members exhibit a variety of ground states,from quantum spin liquid to exotic ordered phases,providing fascinating insight into quantum *** simple crystal structure and chemical tunability enable systematic exploration of competing interactions in quantum *** neutron scattering and thermodynamic studies have revealed rich phase diagrams and unusual excitations,refining theoretical models of frustrated *** review provides a succinct introduction to ARECh_(2)*** summarizes key findings on crystal structures,single-ion physics,magnetic Hamiltonians,ground states,and low-energy *** highlighting current developments and open questions,we aim to catalyze further exploration and deeper physical understanding on this frontier of quantum magnetism.

关键词： quantum excitation crystal

Impact of short-term ambient air pollution exposure on the risk of severe COVID-19

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Journal of Environmental Sciences 2024年第1期135卷 610-618页

作者： Baihuan Feng Jiangshan Lian Fei Yu Dan Zhang weizhen Chen QiWang Yifei Shen Guoliang xie Ruonan Wang Yun Teng Bin Lou Shufa Zheng Yida Yang Yu Chen Department of Laboratory Medicine The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310000China Key Laboratory of Clinical In Vitro Diagnostic Techniques of Zhejiang Province Hangzhou 310000China Institute of Laboratory Medicine Zhejiang UniversityHangzhou 310000China Department of Infectious Diseases The First Affiliated HospitalZhejiang University School of MedicineHangzhou 310000China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious Diseasesthe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310000China

Ecological studies suggested a link between air pollution and severe COVID-19 outcomes,while studies accounting for individual-level characteristics are *** the present study,we aimed to investigate the impact of short-term ambient air pollution exposure on disease severity among a cohort of 569 laboratory confirmed COVID-19 patients admitted to designated hospitals in Zhejiang province,China,from January 17 to March 3,2020,and elucidate the possible biological processes involved using *** with mild cases,severe cases had higher proportion of medical conditions as well as unfavorable results in most of the laboratory tests,and manifested higher air pollution exposure *** exposure to air pollutants was associated with increased risk of severe COVID-19 with odds ratio(OR)of 1.89(95%confidence interval(CI):1.01,3.53),2.35(95%CI:1.20,4.61),2.87(95%CI:1.68,4.91),and 2.01(95%CI:1.10,3.69)for PM_(2.5),PM_(10),NO_(2)and CO,*** for NO_(2)remained significant in two-pollutant models after adjusting for other *** analysis showed 884 differentially expressed genes which mainly were enriched in virus clearance related biological processes between patients with high and low NO_(2)exposure levels,indicating that compromised immune response might be a potential underlying mechanistic *** findings highlight the impact of shortterm air pollution exposure,particularly for NO_(2),on COVID-19 severity,and emphasize the significance in mitigating the COVID-19 burden of commitments to improve air quality.

关键词： Air pollution COVID-19 Severity Transcriptomics Immune response

Effects of angiotensin Ⅱ receptor blocker usage on viral load,antibody dynamics, and transcriptional characteristics among COVID-19 patients with hypertension

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2021年第4期22卷 330-340页

作者： Baihuan FENG Dan ZHANG Qi WANG Fei YU Qianda ZOU Guoliang xie Ruonan WANG Xianzhi YANG weizhen CHEN Bin LOU Shufa ZHENG Yu CHEN Department of Laboratory Medicine the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Key Laboratory of Clinical in Vitro Diagnostic Techniques of Zhejiang Province Hangzhou 310003China Institute of Laboratory Medicine Zhejiang UniversityHangzhou S10003China State Key Laboratory for Diagnosis and Treatment of Infectious Diseases National Clinical Research Center for Infectious DiseasesCollaborative Innovation Center for Diagnosis and Treatment of Infectious Diseasesthe First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Epidemiological evidence suggests that patients with hypertension infected with severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)are at increased risk of acute lung ***,it is still not clear whether this increased risk is related to the usage of renin-angiotensin system(RAS)*** collected medical records of coronavirus disease 2019(COVID-19)patients from the First Affiliated Hospital,Zhejiang University School of Medicine(Hangzhou,China),and evaluated the potential impact of an angiotensin II receptor blocker(ARB)on the clinical outcomes of COVID-19 patients with hypertension.A total of 30 hypertensive COVID-19 patients were enrolled,of which 17 were classified as non-ARB group and the remaining 13 as ARB group based on the antihypertensive therapies they *** with the non-ARB group,patients in the ARB group had a lower proportion of severe cases and intensive care unit(ICU)admission as well as shortened length of hospital stay,and manifested favorable results in most of the laboratory *** loads in the ARB group were lower than those in the non-ARB group throughout the disease *** significant difference in the time of seroconversion or antibody levels was observed between the two *** median levels of soluble angiotensin-converting enzyme 2(sACE2)in serum and urine samples were similar in both groups,and there were no significant correlations between serum sACE2 and biomarkers of disease *** analysis showed 125 differentially expressed genes which mainly were enriched in oxygen transport,bicarbonate transport,and blood *** results suggest that ARB usage is not associated with aggravation of *** findings support the maintenance of ARB treatment in hypertensive patients diagnosed with COVID-19.

关键词： Severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) Coronavirus disease 2019(COVID-19) Reninangiotensin system(RAS) Angiotensin-converting enzyme 2(ACE2) Hypertension

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弯剪受力下群锚有限元分析

四川建筑科学研究 2011年第4期37卷 75-78页

作者：王磊黄为真谢群中国汉嘉设计集团股份有限公司山东分公司山东济南250014 山东省鲁商冰轮建筑设计有限公司山东济南250101 济南大学土木建筑学院山东济南250022

采用型钢—混凝土后锚固连接方式,对弯剪受力下粘结型锚栓群的受力性能进行了试验研究和有限元分析。结果表明,该类连接的破坏形态为锚栓钢材破坏,仅锚栓周围混凝土发生锥体破坏,锚栓内力以拉应力为主。锚固承载力随着埋深的增加而提高... 详细信息

采用型钢—混凝土后锚固连接方式,对弯剪受力下粘结型锚栓群的受力性能进行了试验研究和有限元分析。结果表明,该类连接的破坏形态为锚栓钢材破坏,仅锚栓周围混凝土发生锥体破坏,锚栓内力以拉应力为主。锚固承载力随着埋深的增加而提高,加载端至基材表面的水平距离较大时,弯矩起控制作用,承载力较小;水平距离较小时,则表现为弯剪共同作用,承载力较大。

关键词：后锚固群锚弯剪受力有限元埋深

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影响烷基芳烃蒸发损失的结构因素探索

石油炼制与化工 2019年第10期50卷 8-12页

作者：解增忠叶蔚甄赵毅龙军中国石化石油化工科学研究院

针对蒸发损失这一质量指标对润滑油基础油(简称基础油)使用性能的重要性以及现有测试方法存在的不足,考虑到基础油蒸发损失与低压沸点之间存在密切关系,收集整理了106种烷基芳烃基础油的结构和其在1 333.22 Pa压力下的沸点数据,采用分... 详细信息

针对蒸发损失这一质量指标对润滑油基础油(简称基础油)使用性能的重要性以及现有测试方法存在的不足,考虑到基础油蒸发损失与低压沸点之间存在密切关系,收集整理了106种烷基芳烃基础油的结构和其在1 333.22 Pa压力下的沸点数据,采用分子模拟方法计算得到了这些不同结构烷基芳烃分子的前线轨道能量和电荷分布等反映分子微观结构特征的参数,并计算了各分子不同类型的拓扑指数。采用遗传函数算法(GFA)对这些烷基芳烃在1 333.22 Pa压力下的沸点与其结构参数之间的关系进行了回归分析,建立了物理意义明确的烷基芳烃沸点与其结构参数之间的定量关系方程。方程相关系数的平方为0.978,交叉检验相关系数的平方为0.962,具有较高的可靠性和预测能力。该方程表明烷基芳烃的前线轨道能隙(LUMO-HOMO)、分子极化率和回转半径是影响其在1 333.22 Pa压力下的沸点高低的主要结构因素。烷基芳烃前线轨道能隙越窄,极化率越高,分子回转半径越大,则其在1 333.22 Pa压力下的沸点越高,导致其蒸发难度越大,蒸发损失越低。依据这3个结构参数,利用构建的定量关系方程,能够对烷基苯、烷基萘等芳烃在1 333.22 Pa压力下的沸点高低进行较为准确地预测,对于设计与优化蒸发损失较低的烷基芳烃基础油结构组成具有一定的指导意义。

关键词：烷基芳烃结构参数蒸发损失沸点定量关系