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Performance comparison of single-carrier and multi-carrier waveforms over terahertz wireless channels

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Digital Communications and Networks 2024年第5期10卷 1297-1304页

作者： Dongxuan He Zhi Zhang Hao Lin Zuomin Wu Yingpei Huang zhaocheng Wang Department of Electronic Engineering Tsinghua University OPPO Research Institute Tsinghua Shenzhen International Graduate School

Terahertz(THz) wireless communication has been recognized as a powerful technology to meet the everincreasing demand of ultra-high rate *** order to achieve efficient and reliable wireless communications over THz bands,it is extremely necessary to find an appropriate waveform for THz *** this paper,performance comparison of various single-carrier and multi-carrier waveforms over THz channels will be ***,first,a system model for terahertz communication is briefly described,which includes amplifier nonlinearity,propagation characteristic,phase noise,***,the transceiver architectures related to both single-carrier and multi-carrier waveforms are presented,as well as their corresponding signal processing *** evaluate the suitability of the waveforms,key performance metrics concerning power efficiency,transmission performance,and computational complexity are *** results are provided to compare and validate the performance of different waveforms,which demonstrate the outstanding performance of Discrete-Fourier-Transform spread Orthogonal Frequency Division Multiplexing(DFT-s-OFDM) to THz communications when compared to Cyclic Prefix-OFDM(CP-OFDM) and other single-carrier waveforms.

关键词： Terahertz communication RF imperfection Single-carrier waveform Multi-carrier waveform

Postprocessor development for ultrasonic cutting of honeycomb core curved surface with a straight blade

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Frontiers of Mechanical Engineering 2023年第1期18卷 147-162页

作者： Heng LUO Zhigang DONG Renke KANG Yidan WANG Jiansong SUN zhaocheng WEI Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education Dalian University of TechnologyDalian 116024China

When ultrasonically cutting honeycomb core curved parts,the tool face of the straight blade must be along the curved surface’s tangent direction at all times to ensure high-quality machining of the curved ***,given that the straight blade is a nonstandard tool,the existing computer-aided manufacturing technology cannot directly realize the above action *** solve this problem,this paper proposed an algorithm for extracting a straight blade real-time tool face vector from a 5-axis milling automatically programmed tool location file,which can realize the tool location point and tool axis vector conversion from the flat end mill to the straight *** the same time,for the multi-solution problem of the rotation axis,the dependent axis rotation minimization algorithm was introduced,and the spindle rotation algorithm was proposed for the tool edge orientation problem when the straight blade is used to machine the curved ***,on the basis of the MATLAB platform,the dependent axis rotation minimization algorithm and spindle rotation algorithm were integrated and compiled,and the straight blade ultrasonic cutting honeycomb core postprocessor was then *** model of the machine tool and the definition of the straight blade were conducted in the VERICUT simulation software,and the simulation machining of the equivalent entity of the honeycomb core can then be *** correctness of the numerical control program generated by the postprocessor was verified by machining and accuracy testing of the two designed *** and analysis of the simulation and experiment indicate that the tool pose is the same under each working condition,and the workpieces obtained by machining also meet the corresponding accuracy ***,the postprocessor developed in this paper can be well adapted to the honeycomb core ultrasonic cutting machine tool and realize high-quality and high-efficient machining of honeycomb core composi

关键词： honeycomb core straight blade ultrasonic cutting tool pose postprocessor

实体法视角下低龄未成年人“核准追诉”的理解与展开

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河南财经政法大学学报 2025年第1期40卷 129-143页

作者：曾聪中国政法大学刑事司法学院北京100088

《刑法》第十七条第三款规定的“核准追诉”并非纯粹的程序法要件,而是同时具备实体法意涵。就逻辑前提而言,立法者并未以“个别下调刑事责任年龄”的法律拟制路径改变应负刑事责任的“一般人形象”,只是在极端个案中赋予司法机关具体... 详细信息

《刑法》第十七条第三款规定的“核准追诉”并非纯粹的程序法要件,而是同时具备实体法意涵。就逻辑前提而言,立法者并未以“个别下调刑事责任年龄”的法律拟制路径改变应负刑事责任的“一般人形象”,只是在极端个案中赋予司法机关具体证明个别刑事责任年龄以下者具备刑事责任能力的权力。就权力性质而言,核准追诉权不是以“是否有必要惩罚低龄未成年人”的需罚性考量为中心的自由裁量权,而是以“惩罚低龄未成年人是否正当”的应罚性判断为中心的例外反证权。实体法要件不能独立解决应罚性问题,多数观点完全切割程序法要件与实体法要件的做法不能成立,司法机关应当根据低龄未成年人是否在家庭、学校等具体场景进行充足的法律社会化为根据,补足刑事责任能力的具体证明,这正是“核准追诉”在实体法有责性层面的具体意涵。

关键词：低龄未成年人核准追诉实体法意涵例外反证说法律社会化

Integration of Metabolomics and Subcellular Organelle Expression Microarray to Increase Understanding the Organic Acid Changes in Post-harvest Citrus Fruit

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Journal of Integrative Plant Biology 2013年第11期55卷 1038-1053页

作者： Xiaohua Sun Andan Zhu Shuzhen Liu Ling Sheng Qiaoli Ma Li Zhang Elsayed Mohamed Elsayed Nishawy Yunliu zeng Juan Xu zhaocheng Ma Yunjiang Cheng Xiuxin Deng Key Laboratory of Horticultural Plant Biology Ministry of Education Huazhong Agricultural University

Citric acid plays an important role in fresh fruit flavor and its adaptability to post-harvest storage conditions. In order to explore organic acid regulatory mechanisms in post-harvest citrus fruit, systematic biological analyses were conducted on stored Hirado Buntan Pummelo （HBP; Citrus grandis） fruits. High- performance capillary electrophoresis, subcellular organelle expression microarray, real-time quantitative reverse transcription polymerase chain reaction, gas chromatography mass spectrometry （GC-MS）, and conventional physiological and biochemical analyses were undertaken. The results showed that the concentration of organic acids in HBP underwent a regular fluctuation. GC-MS-based metabolic profiling indicated that succinic acid, ~,-aminobutyric acid （GABA）, and glutamine contents increased, but 2- oxoglutaric acid content declined, which further confirmed that the GABA shunt may have some regulatory roles in organic acid catabolism processes. In addition, the concentration of organic acids was significantly correlated with senescence-related physiological processes, such as hydrogen peroxide content as well as superoxide dismutase and peroxidase activities, which showed that organic acids could be regarded as important parameters for measuring citrus fruit post-harvest senescence processes.

关键词： Citrus gene expression metabolite organic acids post-harvest storage.

淋巴瘤所致冷凝集素综合征3例临床回顾性分析并文献复习

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肿瘤药学 2019年第4期9卷 699-704页

作者：余锋孙令凤王娟沈美晓雷美清曾照成罗贤生陈晓霞王智明杨晓阳中南大学湘雅医学院附属海口医院/海口市人民医院血液科

目的回顾性分析单中心淋巴瘤所致冷凝集素综合征的临床表现、实验室检查特征及预后。方法收集2011年12月-2018年11月我院收治的3例淋巴瘤所致冷凝集素综合征患者的病历资料,分析其临床特征、实验室检查结果及生存情况。结果3例淋巴瘤所... 详细信息

目的回顾性分析单中心淋巴瘤所致冷凝集素综合征的临床表现、实验室检查特征及预后。方法收集2011年12月-2018年11月我院收治的3例淋巴瘤所致冷凝集素综合征患者的病历资料,分析其临床特征、实验室检查结果及生存情况。结果3例淋巴瘤所致冷凝集素综合征患者中包括2例女性,1例男性,中位年龄33(24~73)岁,2例以贫血症状急性加重就诊,1例以指端坏死就诊,3例患者均有明确诱发加重因素;中位血红蛋白52(49~88)g·L^-1,中位冷凝集素滴度1∶512(1∶64~1∶1024);2例患者继发于弥漫大B细胞淋巴瘤,1例继发于淋巴浆细胞淋巴瘤/华氏巨球蛋白血症,均弥漫侵犯骨髓,免疫表型均表达CD20+B细胞淋巴瘤,轻链限制性表达。2例患者行R-CHOP方案化疗6个疗程,其中1例化疗2个疗程后评估达PR,4个疗程后病情进展,6个疗程后死亡,生存时间6个月;1例化疗1个疗程后评估达PR,2个疗程后达CR,生存时间23个月(存活至今)。另1例患者无治疗意愿,仅坏死指端局部保暖治疗,局部症状有所改善,生存时间16个月(存活至今)。结论冷凝集素综合征具有对冷接触相关的特殊临床表现,寒冷、感染、创伤、手术等均可诱发加重溶血,应尽量避免诱发加重因素并积极治疗,其长期疗效和预后取决于其原发疾病的治疗。

关键词：冷凝集素综合征淋巴瘤自身免疫性溶血性贫血冷凝集素

Pro-inflammatory effects of a litchi protein extract in murine RAW264.7 macrophages

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Horticulture Research 2016年第1期3卷 219-225页

作者： Xiaoli Wang Xiaorong Hu Huiqing Yan zhaocheng Ma Xiuxin Deng Key Laboratory of Horticultural Plant Biology College of Horticulture and Forestry SciencesHuazhong Agricultural UniversityWuhan430070China Department of Cardiology Renmin Hospital of Wuhan UniversityWuhan430070China

It has been observed that the consumption of litchi often causes symptoms characterized by itching or sore throat,gum swelling,oral cavity ulcers and even fever and inflammation,which significantly impair the quality of life of a large *** the RAW264.7 cell line,a step-by-step strategy was used to screen for the components in litchi fruits that elicited adverse *** adverse reaction fractions were identified by mass spectrometry and analyzed using the SMART program,and a sequence alignment of the homologous proteins was *** tests were used to determine the cytotoxicity of a litchi protein extract in RAW264.7 macrophages,and real-time PCR was applied to analyze the expression of inflammatory genes in the RAW264.7 cells treated with lipopolysaccharide or the litchi protein *** results showed that the litchi water-soluble protein extract could increase the production of the pro-inflammatory mediators IL-1β,iNOS and COX-2,and the anti-inflammatory mediator HO-1 in the RAW264.7 cell *** 14-3-3-like proteins GF14 lambda,GF14 omega and GF14 upsilon were likely the candidate proteins that caused the adverse effects.

关键词： RAW264.7 inflammatory inflammation

Application of ion chromatography to the determination of water-soluble inorganic and organic ions in atmospheric aerosols

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Journal of Environmental Sciences 2004年第5期16卷 813-815页

作者： YUXue-chun HEKe-bin MAYong-liang YANGFu-mo DUANFeng-kui ZHENGAi-hua zhaocheng-yi DepartmentofEnvironmentalScienceandEngineering TsinghuaUniversityBeijing100084China AnalyticalandTestingCenter BeijingNormalUniversityBeijing100875China

A simple, sensitive and convenient ion chromatography(IC) method was established for the simultaneous determination of twelve water-soluble inorganic anions(F -, Cl -, NO - 2, NO - 3, SO 2- 3, SO 2- 4, PO 3- 4), and fifteen water-soluble organic ions(formate, acetate, MSA, oxalate, malonate, succinate, phthalates, etc.) in atmospheric aerosols. The linear concentrations ranged from 0.005 μg/m 3 to 500 μg/m 3(r = 0.999—0.9999). The relative standard deviation(RSD) were 0.43%—2.00% and the detection limits were from 2.7 ng/m 3 to 88 ng/m 3. The proposed method was successfully applied to the simultaneous determination of those inorganic ions and organic ions in PM 2.5 of Beijing.

关键词： ion chromatography water-soluble ions aerosols Beijing

Shake table experimental study of cable-stayed bridges with two different design strategies of H-shaped towers

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Earthquake Engineering and Engineering Vibration 2021年第2期20卷 483-493页

作者： Xu Yan Cui Cunyu zeng zeng zeng Shijie State Key Laboratory for Disaster Reduction in Civil Engineering Tongji UniversityShanghai 200092China China Three Gorges Project Development Co. LtdChengdu 610041China

As one of the main load-carrying components of cable-stayed bridges,bridge towers are typically required to remain elastic even when subjected to severe ground motions with a 2%-3%probability of exceedance in 50 *** fulfill this special requirement imposed by current seismic design codes,reinforcement ratios in the bridge towers have to be kept significantly higher than if limited ductility behavior of the tower is *** addition,since the foundation capacity is closely related to the moment and shear capacities of the bridge tower,a large increase in bridge construction cost for elastically designed cable-stayed bridge is *** further investigate the possibility of limited ductility bridge tower design strategies,a new 1/20-scale cable-stayed bridge model with H-shaped bridge towers designed according to strong strut-weak tower column design was *** shake table experimental results are compared with a previous strong tower column-weak strut designed full bridge model.A comparison of the results show that ductility design with plastic hinges located on tower columns,i.e.,strong strut-weak tower column design,is another effective seismic design strategy that results in only small residual displacement at the top of the tower column,even under very severe earthquake excitations.

关键词： cable-stayed bridge shake table experiment limited ductility design H-shaped bridge tower seismic design

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腹腔镜肝内胆管癌根治手术的可行性及安全性

临床肝胆病杂志 2025年第12期40卷 2358-2360页

作者：曾琦惠李富宇四川大学华西医院胆道外科成都 610041

腔镜技术已广泛应用于各种肿瘤外科的根治性切除手术中，但对于腹腔镜在肝内胆管癌根治术中的应用尚存在较多争议。近年来，各医学中心对此问题均进行了诸多探索。本文就近年来腹腔镜在肝内胆管癌根治术中的可行性及安全性进行综述，以... 详细信息

腔镜技术已广泛应用于各种肿瘤外科的根治性切除手术中，但对于腹腔镜在肝内胆管癌根治术中的应用尚存在较多争议。近年来，各医学中心对此问题均进行了诸多探索。本文就近年来腹腔镜在肝内胆管癌根治术中的可行性及安全性进行综述，以期为临床实践提供参考。

关键词：胆管上皮癌腹腔镜检查治疗学