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Alternative non-Gaussianity measures for quantum states based on quantum fidelity

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Chinese Physics B 2022年第3期31卷 192-200页

作者： Cheng Xiang shan-shan li sha-sha Wen shao-Hua Xiang College of Electrical and Information Engineering Huaihua UniversityHuaihua 418008 China Hunan Provincial Key Laboratory of Ecological Agriculture Intelligent Control Technology Huaihua 418008China

We propose three alternative measures for non-Gaussianity of quantum states: sine distance, Bures angle, and Bures distance, which are based on quantum fidelity introduced by Wang [Phys. Lett. A 373 58(2008)]. Using them, we evaluate the non-Gaussianity of some relevant single-mode and two-mode non-Gaussian states and find a good consistency of the three examined measures. In addition, we show that such metrics can exactly quantify the degree of Gaussianity of even Schrödinger-cat-like states of small amplitudes that can not be measured by other known non-Gaussianity measures such as the Hilbert–Schmidt metric and the relative entropy metric. We make a comparative study between all existing nonGaussianity measures according to the metric axioms and point out that the sine distance is the best candidate among them.

关键词： non-Gaussianity quantum fidelity non-Gaussian states sine metric

Comparison of sea surface wind field measured by HY-2A scatterometer and WindSat in global oceans

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Journal of Oceanology and limnology 2019年第1期37卷 38-46页

作者： ZheNG Minwei li Xiao-Ming sha Jin Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences University of Chinese Academy of Sciences Laboratory for Regional Oceanography and Numerical Modeling Qingdao National Laboratory for Marine Science and Technology Hainan Key Laboratory of Earth Observation

In this study, we present a comprehensive comparison of the sea surface wind ?eld measured by scatterometer(Ku-band scatterometer) aboard the Chinese HY-2 A satellite and the full-polarimetric radiometer WindSat aboard the Coriolis satellite. The two datasets cover a four-year period from October2011 to September 2015 in the global oceans. For the sea surface wind speed, the statistical comparison indicates good agreement between the HY-2 A scatterometer and WindSat with a bias of nearly 0 m/s and a root mean square error(RMSE) of 1.13 m/s. For the sea surface wind direction, a bias of 1.41° and an RMSE of 20.39° were achieved after excluding the data collocated with opposing directions. Furthermore,discrepancies in sea surface wind speed measured by the two sensors in the global oceans were *** is found that the larger dif ferences mainly appear in the westerlies in the both hemispheres. Both the bias and RMSE show latitude dependence, i.e., they have signi?cant latitudinal ?uctuations.

关键词： sea surface wind feld global comparisons HY-2A scatterometer polarimetric radiometer WindSat

A Web-like Three-dimensional Binder for Silicon Anode in lithium-ion Batteries

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Energy & Environmental Materials 2024年第1期7卷 21-27页

作者： liyuan li Tao li Yifan sha Baozeng Ren Lan Zhang Suojiang Zhang CAS Key Laboratory of Green Process and Engineering Beijing Key Laboratory of Ionic Liquids Clean ProcessState Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China Langfang Green Industrial Technology Center Langfang 065001China henan Key Laboratory of Energy Storage Materials and Processes Zhengzhou Institute of Emerging Industrial TechnologyZhengzhou 450003China

Si anode is of paramount importance for advanced energy-dense lithium-ion batteries(liBs).However,the large volume change as well as stress generates during its lithiation-delithiation process poses a great challenge to the long-term cycling and hindering its *** this work,a composite binder is prepared with a soft component,guar gum(GG),and a rigid linear polymer,anionic polyacrylamide(APAM).Rich hydroxy,carboxyl,and amide groups on the polymer chains not only enable intermolecular crosslinking to form a web-like binder,A2G1,but also realize strong chemical binding as well as physical encapsulating to Si *** resultant electrode shows limited thickness change of merely 9%on lithiation and almost recovers its original thickness on *** demonstrates high reversible capacity of 2104.3 mAh g^(-1)after 100 cycles at a current density of 1800 mA g^(-1),and in constant capacity(1000 mAh g^(-1))test,it also shows a long life of 392 ***,this soft-hard combining web-like binder illustrates its great potential in the future applications.

关键词： anionic polyacrylamide lithium-ion batteries Si anode thickness change web-like binder

Hydrothermal Synthesis and Crystal Structure of a Cd^(2+) Supramolecular Coordination Complex{[Cd_2(HCAM)_2(H_2O)_4]·3.5H_2O}_n with a 3D Metal-organic Open Framework

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1067-1071页

作者： ZHOU Qiu-Xiang li sha-sha WANG Meng BAI Xiao-Jie Langfang Teachers College Langfang 065000 China College of Chemical Engineering and Technology Hebei University of Technology Tianjin 300130 China

A three-dimensional coordination polymer {[Cd2（HCAM）2（H2O）4].***2O}n was synthesized by the hydrothermal reaction of H3CAM （H3CAM = 4-hydroxypyridine-2,6-dicerboxylic acid） and Cd（NO3）2·4H2O. The structure was characterized by elemental analysis, thermal gravimetric analysis, infrared spectroscopy and single-crystal X-ray diffraction. It crystallizes in triclinic, space group P1 with a = 9.4389（19）, b = 11.009（2）, c = 11.192（2） A, α = 87.87（3）, β= 74.63（3）, γ = 81.22（3）°, V= 1108.2（4） A3, Z = 2, Dc= 2.164 g/cm3,μ = 2.011 mm^-1, F（000） = 710, R = 0.0419 and wR = 0.1170. X-ray analysis reveals that the title compound adopts a one-dimensional staircase structure by carboxyl of H3CAM and water molecules, and it is further linked by hydrogen bonds to form a 3-D metal-organic open framework. The thermal gravimetric analysis displays that the framework exists stably below 300 ℃.

关键词： hydrothermal synthesis 3D coordination polymer crystal structure

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百香果藤蔓粉碎刀具的设计与试验

农机化研究 2025年第4期47卷 83-91页

作者：李俊平张德晖何金成贺平李盼春候志涛福建农林大学福州350002 现代农业装备福建省高校工程研究中心(福建农林大学) 福州350002

为提高藤蔓的粉碎效果、降低粉碎能耗,设计了一款藤蔓粉碎刀具。首先,利用ANSYS Workbench/Ls-Dyna对单把等滑切动刀与藤蔓的粉碎过程进行了仿真分析,以刀轴的转速、刀片类型及其等滑切角为影响因素,以比能耗为目标进行正交试验,得到最... 详细信息

为提高藤蔓的粉碎效果、降低粉碎能耗,设计了一款藤蔓粉碎刀具。首先,利用ANSYS Workbench/Ls-Dyna对单把等滑切动刀与藤蔓的粉碎过程进行了仿真分析,以刀轴的转速、刀片类型及其等滑切角为影响因素,以比能耗为目标进行正交试验,得到最优的参数组合:刀具类型为弧形锯齿刀片,刀片滑切角为40°,刀轴转速为800 r/min。制作试验平台对单把等滑切动刀进行试验,试验结果与仿真结果基本一致。最后,对整个粉碎装置进行试验,将藤蔓含水率、刀盘转速、动定刀间隙作为考察因素,以比能耗为主要优化目标、粉碎合格率为次要目标,进行响应曲面试验。试验得到最佳参数组合为动定刀间隙2.44 mm、刀盘转速911.28 r/min、含水率52.02%,此时比能耗为0.140 0 kW·h/kg、碎合格率为97.5317%。

关键词：百香果藤蔓粉碎刀具 LS-DYNA 响应曲面等滑切

维普期刊数据库博看期刊

Si-Assisted Solidification Path and Microstructure Control of 7075 Aluminum Alloy with Improved Mechanical Properties by Selective Laser Melting

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Acta Metallurgica Sinica(English Letters) 2022年第9期35卷 1424-1438页

作者： Junwei sha Meixian li lizhuang Yang Xudong Rong Bowen Pu Dongdong Zhao Simi Sui Xiang Zhang Chunnian he Jianglin Lan Naiqin Zhao School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials Tianjin UniversityTianjin300350China Collaborative Innovation Center of Chemical Science and Engineering Tianjin300350China Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationTianjin300350China Central Iron and Steel Research Institute(CISRI) Beijing100081China

The construction and application of traditional high-strength 7075 aluminum alloy(Al7075) through selective laser melting(SLM) are currently restricted by the serious hot cracking phenomenon. To address this critical issue, in this study, Si is employed to assist the SLM printing of high-strength Al7075. The laser energy density during SLM is optimized, and the eff ects of Si element on solidification path, relative density, microstructure and mechanical properties of Al7075 alloy are studied systematically. With the modified solidification path, laser energy density, and the dense microstructure with refined grain size and semi-continuous precipitates network at grain boundaries, which consists of fine Si, β-MgSi, Q-phase and θ-AlCu, the hot cracking phenomenon and mechanical properties are eff ectively improved. As a result, the tensile strength of the SLM-processed Si-modified Al7075 can reach 486 ± 3 MPa, with a high relative density of ~ 99.4%, a yield strength of 291 ± 8 MPa, fracture elongation of(6.4 ± 0.4)% and hardness of 162 ± 2(HV) at the laser energy density of 112.5 J/mm~3. The main strengthening mechanism with Si modification is demonstrated to be the synergetic enhancement of grain refinement, solution strengthening, load transfer, and dislocation strengthening. This work will inspire more new design of high-strength alloys through SLM.

关键词： Selective laser melting(SLM) 7075 aluminum alloy High-strength alloy Microstructure control Solidification path

Construction of Protograph LDPC Codes Based on the Convolution Neural Network

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China Communications 2023年第5期20卷 84-92页

作者： Zhiyuan Xiao liguang li Jin Xu Jin sha School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China Institute of Wireless Research ZTE CorporationShenzhen 518055China

This paper presents an intelligent protograph construction *** LDPC codes have shown excellent error correction performance and play an important role in wireless *** search or manual construction are often used to obtain a good protograph,but the efficiency is not high enough and many experience and skills are *** this paper,a fast searching algorithm is proposed using the convolution neural network to predict the iterative decoding thresholds of protograph LDPC codes effectively.A special input data transformation rule is applied to provide stronger generalization *** proposed algorithm converges faster than other *** iterative decoding threshold of the constructed protograph surpasses greedy algorithm and random search by about 0.53 dB and 0.93 dB respectively under 100 times of density *** results show that quasi-cyclic LDPC(QC-LDPC)codes constructed from the proposed algorithm have competitive performance compared to other papers.

关键词： LDPC codes protograph codes iterative decoding threshold neural network

Design of ontology mapping framework and improvement of similarity computation

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Journal of Systems Engineering and Electronics 2007年第3期18卷 641-645页

作者： Zheng liping li Guangyao liang Yongquan sha Jing Coll. of Electron and Information Engineering Tongji Univ Shanghai 201804 P. R. China Coll. of Information Science and Engineering Shandong Univ. of Science and Technology Qingdao 266510 P. R China

Ontology heterogeneity is the primary obstacle for interoperation of ontologies. Ontology mapping is the best way to solve this problem. The key of ontology mapping is the similarity computation. At present, the method of similarity computation is imperfect. And the computation quantity is high. To solve these problems, an ontology-mapping framework with a kind of hybrid architecture is put forward, with an improvement in the method of similarity computation. Different areas have different local ontologies. Two ontologies are taken as examples, to explain the specific mapping framework and improved method of similarity computation. These two ontologies are about classes and teachers in a university. The experimental results show that using this framework and improved method can increase the accuracy of computation to a certain extent. Otherwise, the quantity of computation can be decreased.

关键词： ontology ontology heterogeneity ontology mapping wordnet similarity computation.

Management of primary ciliary dyskinesia/Kartagener＇s syndrome in infertile male patients and current progress in defining the underlying genetic mechanism

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Asian Journal of Andrology 2014年第1期16卷 101-106页

作者： Yan-Wei sha Lu Ding Ping li Reproductive Medicine Center Maternal and Child Health Hospital of Xiamen Xiamen China

Kartagener＇s syndrome （KS） is an autosomal recessive genetic disease accounting for approximately 50% of the cases of primary ciliary dyskinesia （PCD）. As it is accompanied by many complications, PCD/KS severely affects the patient＇s quality of life. Therapeutic approaches for PCD/KS aim to enhance prevention, facilitate rapid definitive diagnosis, avoid misdiagnosis, maintain active treatment, control infection and postpone the development of lesions. In male patients, sperm flagella may show impairment in or complete absence of the ability to swing, which ultimately results in male infertility. Assisted reproductive technology will certainly benefit such patients. For PCD/KS patients with completely immotile sperm, intracytoplasmic sperm injection may be very important and even indispensable. Considering the number of PCD/KS susceptibility genes and mutations that are being identified, more extensive genetic screening is indispensable in patients with these diseases. Moreover, further studies into the potential molecular mechanisms of these diseases are required. In this review, we summarize the available information on various aspects of this disease in order to delineate the therapeutic objectives more clearly, and clarify the efficacy of assisted reproductive technology as a means of treatment for patients with PCD/KS-associated infertility.

关键词： assisted reproductive technology clinical diagnosis and treatment genetic mechanism Kartagener's syndrome malefertifity, primary ciliary dyskinesia