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chinese Journal of Chemical Engineering 2024年第3期67卷 97-105页

作者： Jiayin Zhang Lu Zheng Siqi Fang Hongwei Zhang Zhenping cai Kuan Huang Lilong Jiang National Engineering Research Center of Chemical Fertilizer catalyst(NERC-CFC) College of Chemical EngineeringFuzhou UniversityFuzhou 350002China Qingyuan Innovation Laboratory Quanzhou 362801China

The efficient separation and collection of ammonia(NH_(3))during NH_(3) synthesis process is essential to improve the economic efficiency and protect the *** this work,ethanolammonium hydrochloride(EtOHACl)and phenol(PhOH)were used to prepare a novel class of deep eutectic solvents(DESs)with multiple a.tive sites and low *** NH_(3) separation performance of EtOHACl+PhOH DESs was analyzed *** is figured out that the NH_(3) absorption rates in EtOHACl+PhOH DESs are very *** NH_(3) absorption capacities are very high and reach up to 5.52 and 10.74 mol·kg1 at 11.2 and 100.4 kPa under 298.2 K,*** addition,the EtOHACl+PhOH DESs present highly selective absorption of NH_(3) over N_(2) and H_(2) and good regenerative properties after seven cycles of absorption/*** intrinsic separation mechanism of NH_(3) by EtOHACl+PhOH DESs was further revealed by spectroscopic analysis and quantum chemistry calculations.

关键词： Separation Absorption ionic liquid Deep eutectic solvent Multiple a.tive site Low viscosity

chinese consensus on the diagnosis and treatment of immunoglobulin light-chain cardiac amyloidosis

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chinese Medical Journal 2024年第2期137卷 127-129页

作者： Kaini Shen Zhuang tian Yajuan Gao Yining Wang Li Huo Jian Li Yun Zhang Shuyang Zhang On behalf of chinese society of Rare Diseases and Rare Diseases Branch of China Research Hospital a.socia.ion Department of Hematology State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of cardiology State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Clinical Medicine Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Radiology State Key Laboratory of Complex Severe and Rare DiseasesPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Nuclear Medicine Beijing Key Laboratory of Molecular Targeted Diagnosis and Therapy in Nuclear MedicineState Key Laboratory of Complex Severe and Rare DiseasesCenter for Rare Diseases ResearchPeking Union Medical College HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of cardiology The Key Laboratory of Cardiovascular Remodeling and Function ResearchChinese Ministry of EducationChinese National Health Commission and Chinese Academy of Medical SciencesThe State and Shandong Province Joint Key Laboratory of Translational Cardiovascular MedicineQilu HospitalCheeloo College of MedicineShandong UniversityJinanShandong 250012China cardiovascular Disease Research Center of Shandong First Medical University Central Hospital Affiliated to Shandong First Medical UniversityJinanShandong 250013China 不详

Epidemiology of Amyloid Light-Chain cardiac Amyloidosis(AL-ca)The annual incidence of amyloid light-chain(AL)amyloidosis is 3-5/million,and the incidence in men is slightly higher than that in ***,70%of patients with ... 详细信息

关键词： amyloid cardiac diagnosis

A Filament-Associated Halo Coronal Mass Ejection

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chinese Journal of Astronomy and Astrophysics 2001年第1期1卷 85-98页

作者： Jun Zhang, Jingxiu Wang, and Nariaki Nitta ( Beijing Astronomical Observatory, National Astronomical Observatories,chinese Academy of Sciences, Beijing 100012 Lockheed Ma.tin Solar and Astrophysics Laboratory, Palo Alto, ca 94304, USA) Beijing Astronomical Observatory National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Lockheed Ma.tin Solar and Astrophysics Laboratory Palo Alto CA 94304 USA

There are only a few observations published so far that show the initiation of a coronal mass ejection (CME) and illustrate the magnetic changes in the surface origin of a CME. Any attempt to connect a CME with its local solar a.tivities is meaningful. In this paper we present a clear instance of a halo CME initiation. A careful analysis of magnetograms shows that the only obvious magnetic changes in the surface region of the CME is a magnetic flux cancellation underneath a quiescent filament. The early disturbance was seen as the slow upward motion in segments of the quiescent filament. Four hours later, the filament was accelerated to about 50 km s-1 and erupted. While a small part of the material in the filament was ejected into the upper corona, most of the mass was transported to a nearby region. About forty minutes later, the transported mass was also ejected pa.tially to the upper corona. The eruption of the filament triggered a two-ribbon flare, with post-flare loops connecting the flare ribbons. A halo CME, which is inferred to be associated with the eruptive filament, was observed from LASCO/C2 and C3. The halo CME contained two CME events, each event corresponded to a pa.tial mass ejection of the filament. We suggest that the magnetic reconnection at the lower atmosphere is responsible for the filament eruption and the halo CME.

关键词： Sun: filament - Sun: magnetic fields-Sun: coronal mass ejection

POLES OF ZETA FUNCTionS OF comPLETE INTERSECTionS

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chinese Annals of Mathematics,Series B 2000年第2期21卷 187-200页

作者： WAN DAQING(Department of Mathematics, University of california, Irvine, ca 92697-3875, USA.) Department of Mathematics University of California Irvine CA 92697-3875 USA

A vanishing theorem is proved for e-adic cohomology with compact support on an affine (singular) complete intersection. As an application, it is shown that for an affine complete intersection defined over a finite field of q elements, the reciprocal "poles" of the zeta function are always divisible by q as algebraic integers. A p-adic proof is also given, which leads to further q-divisibiliy of the poles or equivalently an improvement of the polar part of the AxKatz theorem for an affine complete intersection. Similar results hold for a projective complete intersection.

关键词： Pole Zeta function complete intersection

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中国老年心肺复苏急诊专家共识

临床急诊杂志 2024年第5期25卷 213-220页

作者：中华医学会急诊医学分会中国老年医学学会急诊医学分会中国老年心肺复苏急诊专家共识组顾伟郭伟张国强马岳峰谢苗荣孙子程张文博不详清华大学附属垂杨柳医院首都医科大学附属北京中医医院中日友好医院浙江大学医学院附属第二医院首都医科大学附属北京友谊医院

心脏骤停(cardiacarrest,ca)是指突发心脏机械活动停止,循环征象消失,无呼吸或不能正常呼吸,是临床常见的严重事件,其发病率高,生存率低^([1]),是我国当下面临的重要公共卫生挑战之一,《中国心脏骤停与心肺复苏报告(2022年版)》提出ca... 详细信息

心脏骤停(cardiacarrest,ca)是指突发心脏机械活动停止,循环征象消失,无呼吸或不能正常呼吸,是临床常见的严重事件,其发病率高,生存率低^([1]),是我国当下面临的重要公共卫生挑战之一,《中国心脏骤停与心肺复苏报告(2022年版)》提出ca是重大慢性病过早死亡的重要原因。2023年BASIC研究显示,我国院外ca(out-hospitalcardiacarrest,OHca)患者30 d生存率仅为1.2%^([2]),而美国约为10%^([3])。

关键词：心肺复苏老年

全容积IVIM直方图分析对乳腺良恶性病变的影响

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中国CT和MRI杂志 2024年第3期22卷 82-85页

作者：李俊蔡小丽吴奇川牟方胜重庆大学附属三峡医院放射科重庆404000

目的探讨全容积测量体素内不相干运动(IVIM)直方图参数对乳腺良恶性病变的诊断价值。方法收集我院2021年2月-2022年10月术前行多模态磁共振检查并获得病理的153例女性共158例肿瘤。利用直方图处理软件得到肿瘤IVIM(D、D*、f)的直方图... 详细信息

目的探讨全容积测量体素内不相干运动(IVIM)直方图参数对乳腺良恶性病变的诊断价值。方法收集我院2021年2月-2022年10月术前行多模态磁共振检查并获得病理的153例女性共158例肿瘤。利用直方图处理软件得到肿瘤IVIM(D、D*、f)的直方图参数。采用两独立样本t检验(正态分布)或Mann-WhitneyU检验(偏态分布)比较乳腺良、恶性病灶的IVIM直方图参数的差异。绘制ROC评价IVIM直方图参数独立和联合鉴别诊断乳腺良、恶性病变的效能,Z检验评价联合诊断ROC下面积(AUC)差异性。单变量及多变量二元logisti回归分析独立影响因素。结果乳腺恶性病变116个,良性病变42个。良、恶性病变D(90th、熵、峰度、均值、中位数、最小值、偏度)、f峰度、D*(90th、熵、峰度、均值、中位数、最大值、偏度)单因素分析有统计学意义。AUC最大为D偏度(0.818);敏感度最高为D熵(0.957);特异度最高为D偏度(0.857);准确度最高为D偏度(0.797)。D直方图联合诊断AUC、敏感度、特异度、准确度分别为0.903、0.948、0.786、0.88;f直方图联合诊断分别为0.604、0.672、0.548、0.73;D*直方图联合诊断为0.833、0.897、0.619、0.823;IVIM直方图联合诊断为0.953、0.982、0.833、0.924;IVIM直方图联合诊断AUC面积最大,与D值、f值、D*直方图分别联合诊断AUC差异有统计学意义。D熵(OR=2.943;P=0.037)及D中位数(OR=0.984;P=0.029)为乳腺恶性病变独立影响因素。结论乳腺磁共振IVIM直方图参数联合能显著提高判断乳腺良恶性病变诊断效能,D熵及D中位数为乳腺恶性病变独立影响因素。

关键词：乳腺病变体素内不相干运动成像联合诊断影响因素

维普期刊数据库博看期刊

Design of Sliding Mode Control with Disturbance Observers for Inertial Platform 25th

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Design of Sliding Mode Control with Disturbance Observers fo...

ON THE KINEMAtiC GEOMETRY OF MANY BODY SYSTEMS

第25届中国控制与决策会议

作者： Yue Hu Yuan ca Shifeng Zhang College of Aerospace Science and Engineering National University of Defense and Technology

ISBN: (纸本)9781467355339

In the flight process, the disturbances such as vibrations and frictions affect the stability accuracy of the servo loop of the inertial platform. Besides, the model uncertainties exist due to the couplings of the three subsystem of the inertial platform. This paper presents a sliding mode controller based on a proportional integral （PI） disturbance observer. The state variables and disturbing torque are estimated accurately by the PI observer. Additionally, an integral sliding mode controller is designed. The vibration and stability error are reduced by employing the integral items of the states in designing the sliding mode surface. The simulation results show that the proposed methods can improve the control precision of the servo loop of the platform.

关键词： integral sliding mode control disturbance observer stabilized control of platform

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chinese Annals of Mathematics,Series B 1999年第1期20卷 11-28页

作者： WU-YI HSIANG(Department of Mathematics,University of caLIFORNIA,berkeley,ca 94720-3840,USA) Department of Mathematics University of California Berkeley CA 94720-3840 USA

In mechanics, both classical and quantum, one studies the profound intera.tion betweentwo types of energy, namely, the kinetic energy and the potential energy. The former can beorganized as the kinematic metric on the configuration space while the latter can be representedby a suitable potential function, such as the Newtonian potential in celestial mechanics andthe Coulomb potential in quantum mechanics of atomic and molecular physics. In this paper,the author studies the kinematic geometry of n-body systems. The main results are (i) theintroduction of a canonical coordinate svstem which reveals the total amount of kinematicsymmetry by an SO(3) x O(n-1) a.tion in such a canonical coordinate representationt (ii) anin depth analysis of the above kinematic system both in the setting of classical invariant theoryand by the technique of equivariant Riemannian geometry; (iii) a remarkably simple formulafor the potential function in such a canonical coordinate system which reveals the well-fittingbetween the kinematic symmetry and the Potential energy.

关键词： Kinematic geometry Many body system Configuration space

Kinetics of early methane generation from Green River shale

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chinese Science Bulletin 1998年第22期43卷 1908-1912页

作者： LIU Jinzhong\+1 and TANG Yongchun 2 1. Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, chinese Academy of Sciences, Guangzhou 510640, China 2. Chevron Petroleum Technology company, ca 90633, USA Laborarory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Chevron Petroleum Technology company USA

During oil/gas exploration in an area, there is a question as to whether methane in the strata was generated \%in situ\% mainly by thermal degradation of local organic matter. The key to the question is whether the kerogen could produce methane of more than 80 mL/g TOC, when its \%R\%\-o increased from initial (0.36%) to current value of 0.70% during thermal evolution. The authors have made efforts to answer this question by the kinetics method. First, a series of pyrolysis experiments were carried out to obtain data of methane yield and \%R\%\-o evolution, from which kinetic parameters of methane and \%R\%\-o were derived; then these parameters were extrapolated to the geological condition and finally, a methane yield, 96 mL/g TOC, was predicted. The result suggests that from the view of hydrocarbon generation, methane in the seam should be from thermal degradation of local kerogen.

关键词： methane kinetics pyrolysis organic geochemistry.

Analysis on the decadal scale variation of the dust storm in North China

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Science China Earth Sciences 2005年第12期48卷 2260-2266页

作者： KANG Dujuan1,2 & WANG Huijun1 1. NZC/LASG, Institute of Atmospheric Physics, chinese Academy of Sciences, Beijing 100871, China 2. Environmental Fluid Mechanics Laboratory, Stanford University, Stanford ca 94305, USA NZC/LASG Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China Environmental Fluid Mechanics Laboratory Stanford University Stanford USA

In this paper, the temporal variation characteristics of the dust storm in North China are investigated. Based on power spectrum analysis and wavelet analysis, 1956-1970 and 1985-1999 are chosen as the high-frequency and low-frequency dust storm decades respectively. Analysis results clearly show that the spring and wintertime anomalous atmospheric circulation between these two dec-ades are significantly different. compared with the former decade, there are a strengthened polar vortex, enhanced westerlies near 50°N, and a weak East Asian major though in the winter of the latter decade. The north and center parts of the Siberian high and the Aleutian low become weak. The southerly and easterly wind anomalies appear over the north and east parts of China, which implies the weakening of East Asian winter monsoon. Meanwhile, northern China experiences warmer winters and wetter springs, which are in favor of the weakening of dust storm intensity in North China. There are significant out-of-phase relationships between dust frequency and wintertime westerly intensity, as well as between dust frequency and Arctic Oscillation. It is also found that the frequency of dust weather is strongly re-lated to winter-springtime East Asian monsoon intensity.

关键词： dust storm, climate anomaly, decadal scale variability, East Asian monsoon, AO.