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Helium and Oxygen isotopic evidence on exchange of waters betweenthe western Pacific Ocean and the South China Sea

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Acta Oceanologica Sinica 2000年第4期19卷 73-79页

作者： ren jianguo Wang Xianbin Department of Oceanology Xiamen UniversityXiamen 361005China College of Marine Geosciences Ocean University of QingdaoQingdao 266003China Lanzhou Institute of Geology CASLanzhou 730000China

The composition and distribution of helium and oxygen isotopes in samples of seawater ob-tained at depths from surface to 300 m in the western Pacific Ocean (7°-26°N, 122° - 130°E) were discussed in detail. The results shaw that both δ18O and δ3He isoline extend eastward in the Pacific side of the Bashi Channel, which may suggest that the South China Sea water intrudes into the western Pacific by the Bashi Channel.

关键词： The western Pacific Ocean δ^(18)O δ^(3)He distribution mixing

A constitutive model based on the evolution and coalescence of elliptical micro-cracks for quasi-brittle materials

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Chinese Science Bulletin 2012年第28期57卷 3773-3781页

作者： NING jianguo ren HuiLan FANG MinJie State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

Damage and failure of quasi-brittle materials are caused by the evolution and coalescence of *** solve the problem of elliptical micro-crack growth at the elastic deformation stage,a method of complex potential functions is proposed and the effect of the initial orientation on micro-crack growth and deflection is *** critical stress condition for the initial damage is derived according to the criterion of micro-crack *** on energy conservation during wing-crack propagation,a damage constitutive model is developed with the strain criterion created in the condition of micro-crack *** stress-strain curves of quasi-brittle materials in uniaxial compression obtained based on this model are examined with the experimental results.

关键词：损伤本构模型准脆性材料微裂纹椭圆形合并基础演变裂纹生长

The changes in telomerase activity and telomere length in HeLa cells undergoing apop-tosis induced by sodium butyrate

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Chinese Science Bulletin 2001年第2期46卷 148-153页

作者： jianguo ren Huili Xia Yaoren Dai Tsing Hua Univ Dept Biol Sci & Biotechnol Beijing 100084 Peoples R China

The changes in telomerase activity and telomere length during apoptosis in HeLa cells as induced by sodium butyrate (SB) have been studied. After a 48 h SB treatment, HeLa cells demonstrated characteristic apoptotic hallmarks including chromatin condensation, formation of apoptotic bodies and DNA Laddering which were caused by the cleavage and degradation of DNA between nucleosomes. There were no significant changes in telomerase activity of apoptotic cells, while the telomere length shortened markedly. In the meanwhile, cells became more susceptible to apoptotic stimuli and telomere became more vulnerable to degradation after telomerase activity was inhibited. All the results suggest that the apoptosis induced by SB is closely related to telomere shortening, while telomerase enhances resistance of HeLa cells to apoptotic stimuli by protecting telomere.

关键词： telomerase telomere apoptosis sodium butyrate.

A Defect Detection Method for the Primary Stage of Software Development

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Computers, Materials & Continua 2023年第3期74卷 5141-5155页

作者： Qiang Zhi Wanxu Pu jianguo ren Zhengshu Zhou School of Computer Science and Technology Jiangsu Normal UniversityXuzhou221116China Graduate School of Informatics Nagoya UniversityNagoya4648601Japan

In the early stage of software development,a software requirements specification(SRS)is essential,and whether the requirements are clear and explicit is the ***,due to various reasons,there may be a large number of *** generate high-quality software requirements specifications,numerous researchers have developed a variety of ways to improve the quality of *** this paper,we propose a questions extraction method based on SRS elements decomposition,which evaluates the quality of SRS in the form of numerical *** proposed method not only evaluates the quality of SRSs but also helps in the detection of defects,especially the description problem and omission defects in *** verify the effectiveness of the proposed method,we conducted a controlled experiment to compare the ability of checklist-based review(CBR)and the proposed method in the SRS *** CBR is a classicmethod of reviewing SRS *** a lot of practice and improvement for a long time,CBR has excellent review ability in improving the quality of software requirements *** experimental results with 40 graduate studentsmajoring in software engineering confirmed the effectiveness and advantages of the proposed ***,the shortcomings and deficiencies of the proposed method are also observed through the ***,the proposed method has been tried out by engineers with practical work experience in software development industry and received good feedback.

关键词： Computer science software engineering requirement engineering software quality defect detection

Synthesis of Alumina-Coated Natural Graphite for Highly Cycling Stability and Safety of Li-Ion Batteries

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Chinese Journal of Chemistry 2019年第4期37卷 342-346页

作者： Tao Xu Chengkun Zhou Haihui Zhou Zekun Wang jianguo ren BTR New Energy Materials Inc ShenzhenGuangdong 518106China

The natural graphite(NG)urdformly coated with alumina ceramics(Al2O3)was successfully synthesized through sol-gel *** aluminum plastic film soft-packed battery prepared using Al2O3-coated NG as anode material exhibits excellent cycle performance and safety *** cycling retention of AN-1 is 84.95% after 200 cycles at a rate of 1 C in a potential window ranging from 3.0 to 4.35 V,which is much greater than 75.07% of NG under the same test *** result of the nail penetration tests shows that the successful nail penetration rate of the NG used as anode is 0%,while that of Al2O3 coated samples AN-1 is 100%.The test results show that the Al2O3 coating could act as a solid electrolyte to suppress side reactions,improve cycle stability,and prevent a thermal runaway under mechanical abuse.

关键词： Alumina-Coated Natural Graphite Highly Cycling Stability Li-Ion Batteries

Expression of Bcl-2 in cells with different telomerase activities

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Chinese Science Bulletin 2001年第23期46卷 1980-1984页

作者： CHEN Jing ren jianguo ZHENG Jianyu CAI Guoping DAI Yaoren Department of Biological Sciences and Biotechnology Tsinghua UniversityNational Key Laboratory of Biomembrance and Membrance BiotechnologyBeijing 100084China Institute for Molecular Biology Nankai UniversityTianjin 300071China

Both tclomerase and Bcl-2 are important genes in controlling apoptosis. The activation of telomerase and the abnormal regulation of Bcl-2 are also closely related to carcinogenesis. However, little is known about the linkage between telomerase and Bcl-2. The effect of activated telomerase on the expression of Bcl-2 has been investigated. It is demonstrated that in tumor and transformed cells with higher telomerase activity, Bcl-2 expression is significantly lower than that in telomerase negative or less telomerose activity cells. Further study showed that in the telomerase gene-transformed 2BS-fibroblasts, Bcl-2 expression is inhibited significantly while the exogenous telomerase catalyticsubunit gene is re-expressed in flbroblasts. Results indicated that there might be a certain linkage between the expression of telomerase and Bcl-2, and overexpression of exogenous telomerase gene might down regulate the expression of Bcl-2.

关键词： telomere telomerase Bcl-2.

An Anti-Physical Attack Scheme of ARX Lightweight Algorithms for IoT Applications

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Computer Systems Science & Engineering 2023年第7期46卷 389-402页

作者： Qiang Zhi Xiang Jiang Hangying Zhang Zhengshu Zhou jianguo ren Tong Huang School of Computer Science and Technology Jiangsu Normal UniversityXuzhou221116China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua UniversityBeijing100084China Graduate School of Informatics Nagoya UniversityNagoya4648601Japan College of Chemical Engineering Nanjing Tech UniversityNanjing211816China

The lightweight encryption algorithm based on Add-Rotation-XOR(ARX)operation has attracted much attention due to its high software affinity and fast operation ***,lacking an effective defense scheme for physical attacks limits the applications of the ARX *** critical challenge is how to weaken the direct dependence between the physical information and the secret key of the algorithm at a low *** study attempts to explore how to improve its physical security in practical application scenarios by analyzing the masking countermeasures of ARX algorithms and the leakage ***,we specify a hierarchical security framework by quantitatively evaluating the indicators based on side-channel ***,optimize the masking algorithm to achieve a trade-off balance by leveraging the software-based local masking strategies and non-full-round masking ***,refactor the assembly instruction to improve the leaks by exploring the leakage cause at assembly *** illustrate the feasibility of the proposed scheme,we further conducted a case study by designing a software-based masking method for *** experimental results show that the proposed method can effectively weaken the impact of physical attacks.

关键词： IoT security lightweight encryption anti-physical attack ARX algorithms

Asymmetric fireproof gel polymer electrolyte constructed by boron-contained covalent organic framework for dendrite-free sodium metal battery

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Nano Research 2024年第11期17卷 9679-9687页

作者： Zhanming Liu Rui Wang Jiayi Yu Zhengrui Miao Zijian Xu jianguo ren Suli Chen Tianxi Liu Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China BTR New Material Group Co. Ltd. Shenzhen 518000 China

Gel polymer electrolytes (GPEs) with flexibility, easy processability, and low cost have been regarded as promising alternatives for conventional liquid electrolytes in next-generation sodium metal batteries (SMBs). However, GPEs often suffer from combustion risk and inferior interfacial compatibility toward Na metal anode, which severely limit their wide commercial applications. Here, a rational design of asymmetric fireproof GPE (AFGPE) modified with a boron-contained covalent organic framework (BCOF) on one side is developed through in-situ crosslinking polymerization process. Benefiting from the unique structure and composition, the resulting AFGPE exhibits high Na+ transference number, wide electrochemical window, excellent mechanical properties and high safety. Especially, the nanoscale BCOF layer with uniform nanochannels works as ion sieve that homogenizes Na+ flux during Na plating process, while the abundant Lewis-acid B sites can strongly capture counter anions and decrease space charge layer at anode side, thus promoting the uniform Na deposition to effectively suppress dendrite growth. Consequently, the Na/AFGPE/Na symmetric cells demonstrate remarkable cycling stability for over 1200 h at 0.1 mA·cm^(-2), and the solid-state SMBs exhibit outstanding cycling properties and rate capability, delivering a high capacity retention of 96.4% under current density of 1 C for over 1000 cycles.

关键词： gel polymer electrolyte sodium metal battery covalent organic framework flame-retardant interfacial stability

Leakage of mantle helium from the Liaodong Peninsula, China

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Chinese Science Bulletin 1998年第9期43卷 761-764页

作者： jianguo ren Xianbin Wang Jianfa Chen Chunyuan Li Hui Yang Ziyuan Ouyang Lanzhou Inst Geol State Key Lab Geochem Lanzhou 730000 Peoples R China Chinese Acad Sci Inst Geochem Guiyang 550002 Peoples R China

The isotopic compositions of helium have been investigated in hot spring gases sampled from the Liaodong Peninsula, China. The 3He/ 4He ratios range from 0.14 Ra (0.14 times the atmospheric 3He/ 4He ratio of 1.40×10 -6) to 0.72 Ra. 3He/ 4He versus 4He/ 20Ne ratios and He contents suggest that a small amount of mantle-derived helium reaches the earth’s surface. Helium isotope ratios of the hot spring gases show a distribution pattern similar to the regional heat flow values, indicating that the positive thermal anomaly occurring in the area is closely associated with the presence of mantle-derived helium. The observations described above provide some significant evidence that the molten magma originating from partial melting of the upper mantle may have intruded into the continental crust along the activity fault. The coupling of the presence of mantle He and heat flow anomalies to seismic activity in studied region seem to imply that there is an internal relationship between mantle degassing and seismic

关键词： Liaodong Peninsula hot spring gas 3He/ 4He ratio heat flow.