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Start-up Characteristics of Linear Compressors in a Refrigeration System

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Journal of Thermal Science 2021年第2期30卷 598-609页

作者： ZOU Huiming LI xuan TANG Mingsheng TIAN changqing Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

This work investigates the start-up characteristics of linear compressors in a refrigeration system through experiment and *** are carried out by a refrigeration test system with a linear compressor controlled by a LabVIEW platform.A simulation model that considers the nonlinear process of gas force is set up on the basis of Runge-Kutta method for linear *** with the experimental results,the simulation errors are within 15%,including the unstable *** influences of ambient temperature and power frequency on linear compressors are studied through *** phenomena exist at 25℃ ambient temperature compared with the designed ambient temperature of 35℃.The unsteadiness mechanism is analyzed by *** analysis indicated that two sensitive stages of linear compressors,namely,starting to pump and touching top dead center,are ***,properly increasing equivalent mass (approximately 3%) or spring stiffness doring the design stage can be a practical method to improve the stability of linear compressors.

关键词： linear compressor start-up dynamic characteristics unsteadiness

Nanotechnology for diagnosis and therapy of theumatoid arthritis:Evolution towards theranostic approaches

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Chinese Chemical Letters 2021年第1期32卷 66-86页

作者： Junkai Zhao xuan Chen Kwun-Hei Ho Chao Cai Cheuk-Wing Li Mo Yang changqing Yi Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument School of Biomedical EngineeringSun Yat-sen UniversityShenzhen 518107China Department of Biomedical Engineering the Hong Kong Polytechnic UniversityHong KongChina School of Science and Technology Nottingham Trent UniversityClifton LaneNottinghamNG118NSUnited Kingdom

Rheumatoid arthritis(RA),as a chronic autoimmune disease,damages the bone and cartilage of patients,and even leads to ***,the diagnosis and treatment of RA is particularly ***,due to the complexity of RA,it is difficult to make effective early diagnosis of RA,which is detrimental to RA ***,long-term intake of anti-RA drugs can also cause damage to patients' *** emergence of nanotechnology provides the new train of thoughts for the diagnosis and treatment of *** the combination of diagnosis and therapy is an ideal method to solve the problem of disease management of RA *** this review,we summarize the mechanism and microenvironment of RA,discuss the commonly used diagnostic techniques and therapeutic drugs for RA,and review their advantages and *** nanotherapy strategies such as drug-carrying nanoparticles,PTT,PDT are listed,and their applications in RA treatment are also *** addition,multimodal imaging,combined therapy and responsive diagnosis and treatment are also summarized as important *** last,we also review typical nanocarriers that can be used in the integration of diagnosis and therapy,and discussed their potential applications in RA theranostics.

关键词： Rheumatoid arthritis Diagnosis Therapy Theranostics Nanomedicine

Investigation on graphene growth by roll-to-roll chemical vapor deposition

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Science China Materials 2022年第4期65卷 1042-1048页

作者： Minghao Liang Ling-xuan Qian Yuting Hou Jun Li changqing Shen Fangzhu Qing Xuesong Li State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu610054China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu610054China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen518110China

Both batch-to-batch(B2 B)and roll-to-roll(R2 R)processes can be used for mass production of graphene *** of the simplicity of equipment,the B2 B process is more commonly used in laboratory *** contrast,the R2 R process is more industrially preferred because it is easier to automate and more compatible with the subsequent transfer *** to now,the research on R2 R process has mainly focused on the design of the reactor or the loading configuration,but the in-depth understanding on the growth kinetics is *** this paper,we investigated the evolution of graphene growth and revealed that the graphene domain density grown by the R2 R process was larger than that by the B2 B process with the same reaction parameters,which was attributed to different reaction profiles between the two ***,the defective graphene could be healed with elongated reaction *** the optimized R2 R process,graphene films with quality comparable to those grown by conventional B2 B process could be *** research will promote the development of the mass-production technique for graphene films.

关键词： graphene chemical vapor deposition roll to roll kinetics

欧盟法视野下的情报部门元数据监控——以欧洲法院数字权利案为视角

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情报杂志 2016年第11期35卷 14-19,50页

作者：吴常青薛大政吴轩天津商业大学法学院天津300134 天津市人民检察院第一分院天津300101

[目的/意义]随着科学技术的迅猛发展,与对通讯内容进行监控相同,情报部门对元数据的监控亦会严重干涉被监控者的基本权利。因而如何规制情报部门元数据监控从而在国家安全维护和公民基本权利保障之间取得平衡遂成为当前各国亟待解决的... 详细信息

[目的/意义]随着科学技术的迅猛发展,与对通讯内容进行监控相同,情报部门对元数据的监控亦会严重干涉被监控者的基本权利。因而如何规制情报部门元数据监控从而在国家安全维护和公民基本权利保障之间取得平衡遂成为当前各国亟待解决的问题。[方法/过程]通过分析《数据保护指令》《数据保存指令》和《欧盟基本权利宪章》对情报部门元数据监控的规制,以及2014年欧洲法院数字权利案的基本法理。[结果/结论]可以得出:欧盟法对情报部门元数据监控的规制一直处于国际社会前列;数字权利案明确情报部门元数据监控会干涉公民表达自由权、个人生活权和个人数据权,并为情报部门元数据监控设置更高的标准;该案判决对欧盟成员国影响深远,也对包括我国在内的欧盟以外国家和地区极具参考价值。

关键词：元数据元数据监控情报部门欧盟法欧洲法院数字权利案

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英国秘密情报向诉讼证据转化制度研究

情报杂志 2018年第2期37卷 24-29页

作者：吴常青吴轩李晨蕾天津商业大学法学院天津300134 天津市人民检察院第一分院天津300101 天津铁路运输检察院天津300142

[目的/意义]在情报诉讼功能日益凸显的当前社会,深入研究英国秘密情报向诉讼证据转化制度,对于提升恐怖主义及其关联犯罪追诉能力及被告权利保障水平有着重要的意义。[方法/过程]以英国法律、判例和研究文献为基础,运用规范分析、文献... 详细信息

[目的/意义]在情报诉讼功能日益凸显的当前社会,深入研究英国秘密情报向诉讼证据转化制度,对于提升恐怖主义及其关联犯罪追诉能力及被告权利保障水平有着重要的意义。[方法/过程]以英国法律、判例和研究文献为基础,运用规范分析、文献分析等方法,对英国秘密情报向诉讼证据转化制度的产生、发展及其内容进行深入研究。[结果/结论]提出英国秘密情报向诉讼证据转化制度及其扩展适用存在诸多争议,但符合公正审判的基本要求。该制度在英国的实践运作及其引致的争议为世界其他国家和地区相关制度构建提供丰富的养分。

关键词：秘密情报证据特别律师公正审判

Provenance and paleogeography of Carboniferous-Permian strata in the Bayanhot Basin:Constraints from sedimentary records and detrital zircon geochronology

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Geoscience Frontiers 2021年第3期12卷 113-131页

作者： Junfeng Zhao Yijun Zhou KeWang xuan Li Zhanrong Ma Zhengzhong Ruan DongWang Rui Xue State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an710069China changqing Branch of Geophysical Research Institute BGPCNPCXi'an 710021China Exploration and Development Research Institute Changqing Oilfield Company of PetroChinaXi'an 710021China Twelfth Oil Production Plant Changqing Oil Field Company of PetroChinaHeshui 745400China

The Bayanhot Basin is a superimposed basin that experienced multiple-staged tectonic movements;it is in the eastern Alxa Block,adjacent to the North China Craton(NCC)and the North Qilian Orogenic Belt(NQOB).There are well-developed Paleozoic-Cenozoic strata in this basin,and these provide a crucial window to a greater understanding of the amalgamation process and source-to-sink relationships between the Alxa Block and surrounding tectonic ***,due to intensive post-depositional modification,and lack of subsurface data,several fundamental issues-including the distribution and evolution of the depositional systems,provenance supplies and source-to-sink relationships during the Carboniferous-Permian remain unclear and thus hinder hydrocarbon exploration and limit the geological understanding of this *** integrated outcrop surveys,new drilling data,and detrital zircon dating,this study examines the paleogeographic distribution and evolution,and provenance characteristics of the Carboniferous-Permian strata in the Bayanhot *** results show that the Bayanhot Basin experienced a long-term depositional evolution process from transgression to retrogression during the Carboniferous-late *** transgression extent could reach the central basin in the early *** maximum regional transgression occurred in the early Permian and might connect the Qilian and North China seas with each ***,a gradual regression followed until the end of the *** northwestern NCC appeared as a paleo-uplift area and served as a sediments provenance area for the Alxa Block at that *** NCC,Bayanwula Mountain,and NQOB jointly served as major provenances during the *** was no ocean separation,nor was there an orogenic belt between the Alxa Block and the NCC that provided sediments for both sides during the *** accretion of the Alxa and North China blocks should have been completed before t

关键词： Carboniferous-Permian Detrital zircon geochronology Paleogeography Bayanhot Basin Alxa Block North China Craton

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R290直线压缩机变工况制冷性能

化工学报 2021年第S01期72卷 342-347页

作者：邹慧明王英琳李旋唐明生田长青中国科学院空间功热转换技术重点实验室中国科学院理化技术研究所北京100190 中国科学院大学北京100049

根据电子冷却等应用需求,开发了小型制冷装置用R290直线压缩机样机,并开展了变工况性能试验研究。结果表明,在蒸发温度为8.0、2.7和−3.4℃三种工况下,直线压缩机在上死点位置的制冷量分别为1633.4、1417.4和943.4 W,COP分别为6.67、4.24... 详细信息

根据电子冷却等应用需求,开发了小型制冷装置用R290直线压缩机样机,并开展了变工况性能试验研究。结果表明,在蒸发温度为8.0、2.7和−3.4℃三种工况下,直线压缩机在上死点位置的制冷量分别为1633.4、1417.4和943.4 W,COP分别为6.67、4.24和2.63,对应的循环效率分别为67.5%、70.9%和69.3%。蒸发温度2.7℃的设计工况循环效率最高,该工况下,当制冷量在35%~100%调节时,多变指数系数变化范围为0.968~0.983。在压缩机变容量调节过程中,气体等效刚度、固有频率与等效阻尼呈非线性变化,在上死点附近均存在极值点。

关键词： R290 直线压缩机变工况热力学动力学理论

物性参数对非均匀界面裂纹应力强度因子的影响

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机械强度 2014年第6期36卷 989-993页

作者：孙长青张小辉刘劲涛罗旋王超沈阳工程学院机械学院沈阳110036

建立了含非均匀界面层的三区双界面裂纹力学模型并使用了一种工程可设计的功能梯度物性参数变化的函数,系统的研究了均匀材料区域的弹性模量比和非均匀参数对界面裂纹尖端应力强度因子的影响规律,并且使用有限单元法计算界面裂纹的应力... 详细信息

建立了含非均匀界面层的三区双界面裂纹力学模型并使用了一种工程可设计的功能梯度物性参数变化的函数,系统的研究了均匀材料区域的弹性模量比和非均匀参数对界面裂纹尖端应力强度因子的影响规律,并且使用有限单元法计算界面裂纹的应力强度因子,通过计算发现,界面层非均匀参数和均匀材料的弹性模量比对非均匀界面层与均匀材料之间上的界面裂纹尖端的应力强度因子,有着重要的影响。主要规律表现如下:Ⅰ型应力强度因子占主导;弹性模量比大于1时,B1点处Ⅰ型应力强度因子与非均匀参数成非线性关系且存在极值点,该极值点随着弹性模量比的增加而较小,B2点处Ⅰ型应力强度因子随着非均匀参数的增加而增加;弹性模量比小于1时,界面处的Ⅰ型应力强度因子随着非均匀性参数的增大而减小,随弹性模量比的增大而增加,以上规律有利于工程设计来提高界面裂纹的抗断性。

关键词：物性参数非均匀界面应力强度因子有限元法

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情报监控中通信运营商权利义务的比较与借鉴

重庆邮电大学学报（社会科学版） 2018年第4期30卷 79-85页

作者：吴常青吴轩天津商业大学法学院天津300134 天津市人民检察院第一分院天津300101

信息化时代利用高科技进行情报监控对于维护国家安全不可或缺,但也可能造成对通信运营商营业自由权、财产权的严重干涉,因此,在立法上合理设置情报监控中通信运营商的权利义务对其权利保障有着重要的意义。美国、德国和我国台湾地区相... 详细信息

信息化时代利用高科技进行情报监控对于维护国家安全不可或缺,但也可能造成对通信运营商营业自由权、财产权的严重干涉,因此,在立法上合理设置情报监控中通信运营商的权利义务对其权利保障有着重要的意义。美国、德国和我国台湾地区相关法律法规中均有情报监控中通信运营商权利义务的明确规定。课予通信运营商积极配合、消极忍受情报监控的义务会构成对其营业自由权、财产权的干涉,其设置应符合法律保留原则、比例原则的现代法治原则。为推进国家安全法治化建设,我国大陆地区有必要借鉴美国、德国和我国台湾地区的经验,以法律保留原则和比例原则为考量基点,合理设置通信运营商的权利义务,在国家安全维护和通信运营商权利保障之间取得平衡。

关键词：情报监控通信运营商法律保留原则比例原则