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Performance Analysis of a Coupled System based on Organic Rankine Cycle and Double Effect Absorption Refrigeration for Waste Heat Recovery in Data Center

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Journal of Thermal Science 2025年第1期 188-205页

作者： LI Peng XU Jiaqi WANG Binbin liu Jianyang ZHAO Wensheng han Zhonghe School of Energy Power and Mechanical Engineering North China Electric Power University Hebei Key Laboratory of Low Carbon and High Efficiency Power Generation Technology North China Electric Power University

During data center operation,it generates a significant volume of low-grade waste *** recover waste heat,a coupled system including solar collector,double effect absorption refrigeration and organic Rankine cycle is *** system performance is analyzed in *** the organic Rankine cycle,five organic working fluids(R245fa,R245ca,R123,R11,and R113) are selected.R245fa,R113 and R245ca obtain the maximum net power output,thermal efficiency and exergy efficiency,*** the double effect absorption refrigeration system,the evaporation temperature,condensation temperature,and generation pressure affect the COP and exergy *** the generator pressure is unchanged,the COP increases with increasing evaporation temperature and decreasing condensation *** the COP reaches 1.3,the COP slightly decreases as the evaporation temperature or condensation temperature ***,the exergy efficiency of refrigeration systems exhibits the same trend as the COP,and the exergy efficiency maximum value appears at approximately 0.32.A new performance indicator,rPUE,was defined to evaluate the data center power utilization *** flow distribution ratio and heat source temperature were optimized with multi-objective *** the mass flow distribution rate is 0.6 and the heat source temperature is 441.5 K,rPUE and the total unit production costs of the system obtain the optimal solution.

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Theoretical Studies on the Isomerization of Peroxynitrite to Nitrate Mediated by Peroxynitrous Acid

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Chinese Journal of Structural Chemistry 2008年第2期27卷 171-176页

作者： liu Yong-Dong ZHONG ru-Gang College of Life Science ＆ Bioengineering Beijing University of Technology Beijing 100022 China

The conversion of peroxynitrite （ONOO-） to nitrate （NO3-） mediated by peroxynitrous acid （ONOOH） has been investigated at the CCSD/6-311G（d）//B3LYP/6-31 1＋G（d,p） level. Two kinds of pathways for the title reaction were found. The results show that the energy barrier of isomerization through pathway 1 is around 25 kcal/mol in the gas phase. This value is significantly lower than that of isomerization without any catalysts. Thus, it indicates that ONOOH definitely makes the conversion from ONOO- to NO3- feasible. Although pathway 2 does not decrease the energy barrier of this isomerization, peroxynitric acid （O2NOOH） was obtained; moreover, this is a new pathway for this formation. In view of the results that peroxynitrate anion can decompose into nitrite and dioxygen, we conclude that our results are consistent with the experimental observation that nitrate, nitrite, and dioxygen are the main final products of the decay of peroxynitrite around pH 7.

关键词： peroxynitrite peroxynitrous acid isomerization DFT

The E3 ubiquitin ligase SINA1 and the protein kinase BIN2 cooperatively regulate PHR1 in apple anthocyanin biosynthesis

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Journal of Integrative Plant Biology 2023年第9期65卷 2175-2193页

作者： Jian‐Ping An Hong‐Liang Li Zhi‐Ying liu Da‐ru Wang Chun‐Xiang You Yuepeng han CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture Wuhan Botanical GardenHubei Hongshan LaboratoryThe Innovative Academy of Seed Design of Chinese Academy of SciencesWuhan 430074China College of Horticulture Science and Engineering Shandong Agricultural UniversityTai‐An 271018China

PHR1(PHOSPHATE STARVATION RESPONSE1)plays key roles in the inorganic phosphate(Pi)starvation response and in Pi deficiency-induced anthocyanin biosynthesis in plants. However, the post-translational regulation of PHR1 is unclear,and the molecular basis of PHR1-mediated anthocyanin biosynthesis remains elusive. In this study, we determined that MdPHR1 was essential for Pi deficiency-induced anthocyanin accumulation in apple(Malus × domestica). MdPHR1 interacted with MdWRKY75, a positive regulator of anthocyanin biosynthesis, to enhance the MdWRKY75-activated transcription of MdMYB1,leading to anthocyanin accumulation. In addition,the E3 ubiquitin ligase SEVEN IN ABSENTIA1(MdSINA1) negatively regulated MdPHR1-promoted anthocyanin biosynthesis via the ubiquitination-mediated degradation of ***, the protein kinase apple BRASSINOSTEROID INSENSITIVE2(MdBIN2) phosphorylated MdPHR1 and positively regulated MdPHR1-mediated anthocyanin accumulation by attenuating the MdSINA1-mediated ubiquitination degradation of MdPHR1. Taken together,these findings not only demonstrate the regulatory role of MdPHR1 in Pi starvation induced anthocyanin accumulation, but also provide an insight into the post-translational regulation of PHR1.

关键词： anthocyanin biosynthesis apple phosphate starvation response phosphorylation PHR1 ubiquitination

Highly Active Pd-PEPPSI Complexes for Suzuki-Miyaura Cross-coupling of Aryl Chlorides:an Investigation on the Effect of Electronic Properties

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Chemical Research in Chinese Universities 2020年第5期36卷 859-864页

作者： ZhanG Yingying han Fangwai ZhanG Mengvao ZhanG Huixin LI Ying WANG ru ZENG Yongfei liu Guiyan Tianjin Key Laboratory of Stmcture and Performance for Functional Molecules Key Laboratory of Inorganic-organic Hybrid Functional Material ChemistryMinistry of EducationCollege of ChemistryTianjin Normal UniversityTianjin 300387P.R.China

Three new Pd-pyridine enlianced precatalyst preparation stabilization and initiation(PEPPSI)complexes with halogen groups on the N-heterocyclic carbene and pyridine were *** structures have been clearly characterized by nuclear magnetic resonance spectroscopy and X-ray single-crystal di *** e fleets of the electronic properties of halogen groups on the catalytic activity in the Suzuki-Miyaura cross-coupling of aryl chlo-rides were *** Pd-PEPPSI complexes could catalyze the cross-coupling reaction efficiently with a low catalyst loading(0.05%,molar ratio)at room temperature and the products were obtained in high yields.

关键词： Pd-pyridine enhanced precatalyst preparation stabilization and initiation(PEPPSI)complex Suzuki-Miyaura cross-coupling reaction Aryl chloride

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弹体高速侵彻花岗岩靶体的结构响应特性

爆炸与冲击 2025年第1期45卷 013302-1-013302-21页

作者：韩明海刘闯李鹏程刘子涵张先锋南京理工大学机械工程学院江苏南京210094

为探究弹体斜侵彻花岗岩靶体的结构响应特性，基于30 mm弹道炮平台，开展了弹体斜侵彻花岗岩靶试验，获得了非正侵彻作用下弹体结构破坏参数。在此基础上，结合数值模拟方法研究了弹体斜侵彻花岗岩靶的弹体结构变形及断裂机制，分析了... 详细信息

为探究弹体斜侵彻花岗岩靶体的结构响应特性，基于30 mm弹道炮平台，开展了弹体斜侵彻花岗岩靶试验，获得了非正侵彻作用下弹体结构破坏参数。在此基础上，结合数值模拟方法研究了弹体斜侵彻花岗岩靶的弹体结构变形及断裂机制，分析了侵彻初始条件对弹体结构响应的影响规律。研究结果表明：弹体非正侵彻花岗岩靶体时，易发生弯曲和断裂;弹体头尾部所受非对称力是影响弹体响应特性的主要因素，弹体的变形破坏程度由弹体头尾部角速度差峰值大小决定;随着攻角的增大，弹体弯曲程度线性增大，攻角增大到8°时，弹体发生断裂;随着着角的增大，弹体弯曲程度先增大后减小再增大，着角为15°时，弹体弯曲程度最小，着角达到30°时，弹体发生断裂;与着角相比，攻角对弹体结构响应行为的影响更显著;攻角与着角联合作用时，着角的引入会增大弹体临界断裂正攻角，负攻角会削弱弹体抵抗弯曲变形和断裂的能力;撞击速度高于1600 m/s时，弹体撞击速度成为弹体产生不同响应行为的主控因素。

关键词：弹体侵彻岩石靶结构响应

Answering queries using cooperative semantic cache in mobile computing environments

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The Journal of China Universities of Posts and Telecommunications 2012年第3期19卷 54-59页

作者： LIANG ru-bing liu Qiong College of Science South China Agricultural University Guangzhou 510642 China School of Computer Science and Engineering South China University of Technology Guangzhou 510006 China

In cooperative cache research domain, most of previous work engage in peer-to-peer systems and distributed systems, but do not involve applying cooperative semantic cache in mobile computing environments, which wireless communications disconnect at times and clients move frequently. In this paper, we extend the general semantic cache mechanism by enabling mobile clients to share their local semantic caches in a cooperative matter, and the process way and flow chart of the algorithm are described in detail. In addition, we discuss the methods used in cache consistence maintenance, which focus on confirm receiver of the periodic cache invalidation report and the process of validate client＇s local cache. The experiment results indicate cooperative semantic cache mechanism could reduce query response time and increase cache hit ratio effectively.

关键词： cooperative semantic cache cache consistence mobile computing

On Submanifolds of the Unit Sphere with Vanishing Mobius Form and Parallel Para-Blaschke Tensor

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Acta Mathematica Sinica,English Series 2022年第2期38卷 347-370页

作者： Hong ru SONG Xi Min liu School of Mathematical Sciences Dalian University of TechnologyDalian 116024P.R.China

The para-Blaschke tensor are extended in this paper from hypersurfaces to general higher codimensional submanifolds in the unit sphere S^(n),which is invariant under the Mobius transformations on *** some typical new examples of umbilic-free submanifolds in Snwith vanishing Mobius form and a parallel para-Blaschke tensor of two distinct eigenvalues,D_(1) and D_(2),are *** main theorem of this paper is a simple characterization of these newly found examples in terms of the eigenvalues D_(1) and D_(2).

关键词： Parallel Blaschke tensor vanishing Mobius form constant scalar curvature parallel mean curvature vector field

Recent advances in ultrasound-controlled fluorescence technology for deep tissue optical imaging

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Journal of Pharmaceutical Analysis 2022年第4期12卷 530-540页

作者： rui-Lin liu ru-Qian Cai School of Pharmacy Xuzhou Medical UniversityXuzhou221004China Department of Pharmaceutical Analysis School of PharmacyXi'an Jiaotong UniversityXi'an710061China

Fluorescence imaging is a noninvasive and dynamic real-time imaging technique;however,it exhibits poor spatial resolution in centimeter-deep tissues because biological tissues are highly scattering media for optical *** recently developed ultrasound-controlled fluorescence(UCF)imaging is a novel imaging technique that can overcome this *** studies suggest that the effective contrast agent and sensitive imaging system are the two pivotal factors for generating high-resolution UCF images ex vivo and/or in ***,this review highlights the recent advances(2015e2020)in the design and synthesis of contrast agents and the improvement of imaging systems to realize high-resolution UCF imaging of deep *** imaging performances of various UCF systems,including the signal-to-noise ratio,imaging resolution,and imaging depth,are specifically *** addition,the challenges and prospects are *** continuously increasing research interest in this field and emerging multidisciplinary applications,UCF imaging with higher spatial resolution and larger imaging depth may be developed shortly,which is expected to have a far-reaching impact on disease surveillance and/or therapy.

关键词： Ultrasound-controlled fluorescence imaging Temperature-sensitive NIR probes High-resolution Deep tissue Molecular diagnosis

Engineered plant extracellular vesicles for autoimmune diseases therapy

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Nano Research 2024年第4期17卷 2857-2873页

作者： ruina han Yan Wu Yafei han Xiangfei liu han liu Jiacan Su Institute of Translational Medicine Shanghai UniversityShanghai 200444China Organoid Research Center Shanghai UniversityShanghai 200444China National Center for Translational Medicine(Shanghai)SHU Branch Shanghai UniversityShanghai 200444China Department of Orthopedics Shanghai Zhongye HospitalShanghai 200941China Department of Orthopedics Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghai 200092China

Autoimmune diseases(AID)encompass a diverse array of conditions characterized by immune system dysregulation,resulting in aberrant responses of B cells and T cells against the body’s own healthy *** extracellular vesicles(PEVs)are nanoscale particles enclosed by phospholipid bilayers,secreted by plant cells,which facilitate intercellular communication by transporting various bioactive *** to their nanoscale structure,safety,abundant sources,low immunogenicity,high yield,biocompatibility,and effective targeting of the colon and liver,PEVs are regarded as a promising platform for the treatment of *** review provides a comprehensive summary of PEV biogenesis,physicochemical and biological properties,internalization mechanisms,isolation methods,and their applications in various diseases,with a specific focus on their potential roles in ***,we propose engineering approaches and administration methods for ***,we present an overview of the advantages and challenges associated with utilizing PEVs for the treatment of *** gaining a comprehensive understanding of PEVs,we anticipate the development of innovative therapeutic strategies for *** and engineered PEVs hold substantial promise as a valuable resource for innovative technologies in AID treatment.

关键词： autoimmune diseases plant extracellular vesicles extracellular vesicles engineering modification