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农林院校研究生心理健康状况调查分析及启示

卫生职业教育 2025年第1期43卷 103-108页

作者：肖晗林辉陈心怡华中农业大学园艺林学学院湖北武汉430070

目的调查某农林院校硕士研究生心理健康状况,为研究生心理健康教育提供理论依据。方法采用卡特尔十六种人格因素量表(卡特尔16PF)对596名硕士研究生进行测试调查,应用SPSS 26.0进行数据处理和统计分析。结果该农林院校部分硕士研究生心... 详细信息

目的调查某农林院校硕士研究生心理健康状况,为研究生心理健康教育提供理论依据。方法采用卡特尔十六种人格因素量表(卡特尔16PF)对596名硕士研究生进行测试调查,应用SPSS 26.0进行数据处理和统计分析。结果该农林院校部分硕士研究生心理健康素养Y1得分显著高于全国成人常模均值(P0.05);不同性别硕士研究生忧虑性因子得分比较有统计学意义(P<0.05),是否为一流学科稳定性和兴奋性因子得分比较有统计学意义(P<0.05),心理健康素养得分211院校显著高于民办院校(P<0.01);农林类硕士研究生与理工类硕士研究生常模比较,稳定性因子、兴奋性因子和紧张性因子得分具有统计学意义(P<0.05);46.67%的研究生读研前后心理健康素养得分显著下降(P<0.01)。结论农林院校硕士研究生整体心理健康状况良好,随着学期的升高其心理压力值不断增大,研究生阶段平均每学期的心理压力值比本科期间平均水平升高41.17%。接近一半的硕士研究生读研后心理健康水平下降,本文依据调查访谈结果构建了研究生心理健康动态场域模式。

关键词：农林院校研究生心理健康

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RCCA-SM9: securing SM9 on corrupted machines

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Science China(Information Sciences) 2024年第11期67卷 106-120页

作者： Rongmao CHEN Jinrong CHEN xinyi HUANG Yi WANG College of Computer National University of Defense Technology Artificial Intelligence Thrust Information Hub Hong Kong University of Science and Technology (Guangzhou)

The SM9 identity-based encryption(IBE) scheme is a cryptographic standard used in China, and has been incorporated into the ISO/IEC standard in 2021. This work primarily proposes a countermeasure to secure the SM9 IBE scheme if its implementation is tampered with or deviated from the standard *** attacks, known as subversion attacks, are feasible and powerful in real-world cryptographic application scenarios. Our goal is to design a subversion-resilient variant of the SM9 IBE scheme, primarily using the cryptographic reverse firewall(CRF) proposed by Mironov and Stephens-Davidowitz at EUROCRYPT 2015.A CRF can sanitize cryptographic transcripts to eliminate covert channels, necessitating that the underlying primitive be rerandomizable. Unfortunately, the rerandomizability of the SM9 IBE scheme is disabled for ensuring security against chosen ciphertext attack(CCA). Hence, we shift our focus to a relaxed version of CCA security called RCCA security, offering security guarantees comparable to CCA security while allowing for ciphertext rerandomization. For this purpose, we design an efficient and RCCA-secure variant of the SM9 IBE scheme with provable security that can integrate with CRFs to achieve subversion resilience.

关键词： SM9 subversion resilience subversion attack cryptographic reverse firewall RCCA

Rab22a-NeoF1:a promising target for osteosarcoma patients with lung metastasis

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Signal Transduction and Targeted Therapy 2020年第1期5卷 1074-1075页

作者： Kai Xie xinyi Zhang Yongguang Tao Key Laboratory of Carcinogenesis and Cancer Invasion Ministry of EducationDepartment of PathologyXiangya HospitalCentral South UniversityChangsha410078 HunanChina Hunan Key Laboratory of Early Diagnosis and Precision Therapy Department of Thoracic SurgeryThe Second Xiangya HospitalCentral South UniversityChangsha410011 HunanChina Department of Neurosurgery Xiangya HospitalCentral South UniversityChangsha410008 HunanChina Department of Cardiovascular Medicine Xiangya HospitalCentral South UniversityChangsha410008 HunanChina Department of Cardiovascular Medicine Third Xiangya HospitalCentral South UniversityChangsha410013 HunanChina NHC Key Laboratory of Carcinogenesis(Central South University) Cancer Research Institute and School of Basic MedicineHunan Key Laboratory of Oncotarget GeneCentral South UniversityChangsha410078 HunanChina

Osteosarcoma is the most common primary malignant bone tumor among adolescents and children,with high level of lung metastasis and poor *** treatment of metastatic cases remains a challenge in the clinic,leading to the dramatically decreased survival ***,the molecular mechanisms are still unclear.A recent article by Kang et *** how chromosomal translocations in osteosarcoma facilitated lung metastasis,and shed new light on its therapeutic strategies1(Fig.1).

关键词： metastasis osteosarcoma lung

Guest-adaptive chiral coassembly of a conformationally locked host into supramolecular boxes and ladders through arene-perfluoroarene force

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Science China Chemistry 2024年第10期67卷 3482-3492页

作者： Weilong Ma xinyi Li Aiyou Hao Pengyao Xing School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100China

Unveiling the role of weak non-covalent forces in chiral self-assembly is pivotal in the design and fabrication of functional chiroptical *** nature of arene-perfluoroarene(AP)force is the electrostatic attraction betweenπ-hole andπplanes of perfluoroarenes and polyaromatic hydrocarbons(PAHs),which is emerging in constructing supramolecular motifs and coassembled optical *** this work,we reveal the potential of AP forces in building diversified levels of chiral coassemblies adaptive to the geometries of *** naphthalene-F8was covalently conjugated with a chiral amine,which folded into a semi-rectangular geometry via two intramolecular F···H *** of naphthalene,anthracene,pyrene,carbazole,perylene and benzoperylene were introduced to afford coassemblies in the crystalline state.X-ray structures suggest the formation of supramolecular boxes that encapsulate the PAHs with a 2:1 stoichiometric ratio,as well as the formation of consecutive layered ladders with a 1:1 stoichiometric *** preference is adaptive to the geometries of PAHs,and experimental and computational results evidenced the ladder structures possess strong binding *** this top,the selective chiral recognition in the mixtures of PAHs was realized,which shows promising applications in the separation of PAHs and rational design of crystalline chiroptical materials.

关键词： arene-perfluoroarene force coassembly supramolecular chirality selectivity

Statistical Description of Debris Particle Size Distribution in Electrical Discharge Machining

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Chinese Journal of Mechanical Engineering 2011年第1期24卷 67-72页

作者： JIA Zhenyuan ZHENG xinyi WANG Fuji LIU Wei Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education Dalian University of Technology Dalian 116023 China

Gap debris as discharge product is closely related to machining process in electrical discharge machining（EDM）. A lot of recent researches have focused on the relationship among debris size, surfaces texture, remove rate, and machining stability. The study on statistical distribution of debris size contributes to the research, but it is still superficial currently. In order to obtain the distribution law of the debris particle size, laser particle size analyzer（LPSA） combined with scanning electron microscope（SEM） is used to analyze the EDM debris size. Firstly, the heating dried method is applied to obtain the debris particles. Secondly, the measuring range of LPSA is determined as 0.5–100 μm by SEM observation, and the frequency distribution histogram and the cumulative frequency distribution scattergram of debris size are obtained by using LPSA. Thirdly, according to the distribution characteristic of the frequency distribution histogram, the statistical distribution functions of lognormal, exponentially modified Gaussian（EMG）, Gamma and Weibull are chosen to achieve curve fitting of the histogram. At last, the distribute law of the debris size is obtained by fitting results. Experiments with different discharge parameters are carried out on an EDM machine designed by the authors themselves, and the machining conditions are tool electrode of red-copper material, workpiece of ANSI 1045 material and working fluid of de-ionized water. The experimental results indicate that the debris sizes of all experiment sample truly obey the Weibull distribution. The obtained distribution law is significantly important for all the models established based on the debris particle size.

关键词： electrical discharge machining debris particle measurement size distribution curve fitting

Pressure effects on metal/covalent-organic frameworks:structural and optical properties

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Science China Chemistry 2024年第9期67卷 2890-2903页

作者： Yixuan Wang Yunfeng Yang xinyi Yang Bo Zou Synergetic Extreme Condition High-Pressure Science Center State Key Laboratory of Superhard MaterialsCollege of PhysicsJilin UniversityChangchun 130012China

Metal-organic frameworks(MOFs)and covalent organic frameworks(COFs)with highly ordered porous structure,tunable bandgap,large specific surface area and structural diversity,provide an appealing platform for the development of stimulus response,sensing,imaging and *** various tuning methods,pressure engineering using the diamond anvil cell is a highly powerful in-situ technique,which can efficiently modulate the structural and optical properties of MOFs/*** is beyond the realization of traditional chemical *** review outlines the research progress in the experimentoriented discovery of new phases or unique properties under high pressure,including phase transition,abnormal compression,photoluminescence(PL)discoloration and ***,the improvement of PL quantum yield in MOFs could be achieved by pressure-treated engineering and hydrogen-bonding cooperativity *** also propose and establish the relationship between structure and optical properties under high ***,the challenge and outlook of the current fields are *** hope that this review will supply guidance for comprehending the development of high-pressure MOF/COF-related research fields,and offer novel strategies for designing more high-performance MOF/COF materials to ultimately expand their applications.

关键词： metal/covalent-organic frameworks pressure engineering phase transition abnormal compressive behaviors piezochromic behaviors emission enhancement

Fault-tolerant identity-based encryption from SM9

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Science China(Information Sciences) 2024年第2期67卷 104-117页

作者： Xiaohong LIU xinyi HUANG Zhaohui CHENG Wei WU Fujian Provincial Key Laboratory of Network Security and Cryptology College of Computer and Cyber SecurityFujian Normal University Artificial Intelligence Thrust Information HubThe Hong Kong University of Science and Technology (Guangzhou) Olym Information Security Technology Ltd. Center for Applied Mathematics of Fujian Province School of Mathematics and StatisticsFujian Normal University

This paper initiates the formal study of attribute-based encryption within the framework of SM9,the Chinese National Cryptography Standard for Identity-Based Cryptography, by presenting two new faulttolerant identity-based encryption(FIBE) schemes. Our first scheme uses the same private-key/ciphertext structure as the original SM9 algorithm and operates in a small attribute universe. As a result, it can be effectively and smoothly integrated into the information systems using SM9. In the random oracle model,we prove that our scheme is ciphertext-indistinguishable against fuzzy selective-identity and chosen-plaintext attacks under the(k + 3)-DBDHI assumption. Our second design is a large universe FIBE scheme based on SM9 that is ciphertext-indistinguishable against chosen-plaintext attacks in the random oracle model under the(f, g)-GDDHE assumption. Finally, we compare the communication and computing costs of our schemes to those of other classical ones. The comparison shows that our schemes have comparable performance as others. We believe that our findings will accelerate the applications of SM9 in modern information systems such as cloud computing and blockchain.

关键词： attribute-based encryption identity-based encryption fault-tolerant SM9

Modified joint probabilistic data association with classification-aided for multitarget tracking

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Journal of Systems Engineering and Electronics 2008年第3期19卷 434-439页

作者： Ba Hongxin Cao Lei He xinyi Cheng Qun Air Force Command Coll. Beijing 100097 P. R. China Inst. of Command Automation PLA Univ. of Science & Technology Nanjing 210007 P. R. China Inst. of Combat Systems Naval Academy of Armament Beijing 100073 P. R. China Scientific Research Dept. PLA Univ. of Science & Technology Nanjing 210007 P. R. China

Joint probabilistic data association is an effective method for tracking multiple targets in clutter, but only the target kinematic information is used in measure-to-track association. If the kinematic likelihoods are similar for different closely spaced targets, there is ambiguity in using the kinematic information alone; the correct association probability will decrease in conventional joint probabilistic data association algorithm and track coalescence will occur easily. A modified algorithm of joint probabilistic data association with classification-aided is presented, which avoids track coalescence when tracking multiple neighboring targets. Firstly, an identification matrix is defined, which is used to simplify validation matrix to decrease computational complexity. Then, target class information is integrated into the data association process. Performance comparisons with and without the use of class information in JPDA are presented on multiple closely spaced maneuvering targets tracking problem. Simulation results quantify the benefits of classification-aided JPDA for improved multiple targets tracking, especially in the presence of association uncertainty in the kinematic measurement and target maneuvering. Simulation results indicate that the algorithm is valid.

关键词： multi-target tracking data association joint probabilistic data association classification information,track coalescence maneuvering target.

ENERGY-SAVING TYPE OF HYDRAULIC WORKOVER RIG AND SIMULATION FOR LOWERING PIPESTRING

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Chinese Journal of Mechanical Engineering 2005年第3期18卷 424-428页

作者： Zhang Lujun Gu xinyi Chen Su School of Mechanical and Automobile Engineering Yantai University Yantai 264005 China Drilling Technology Research Institute Shengli Petroleum Administrative Bureau Dongying 257000 China

Research has been done on an energy-saving type of hydraulic workover rig. This rig can recover and reuse the potential energy which is released by the pipestring when lowered, and the equipped power of this rig is only one third of an ordinary rig. The structure and theory of this rig are introduced. The mathematical model of lowering the pipestring is established and a simulation analysis is conducted. Through simulation some conclusions are obtained： The lighter the pipestring is, the less velocity of lowering the pipestring is; The smaller the throttle valve path area is, the less velocity of lowering the pipestring is; Different air vessel volumes have no evident effect on the pipestring lowering velocity. The actual measure results prove that the simulation results are right. Finally, the energy-saving effect of this rig is proved by the field test results.

关键词： Energy-saving Workover rig Energy-recovering Simulation