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Effects of Probe Support on the Stall Characteristics of a Low-Speed Axial Compressor

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Journal of Thermal Science 2016年第1期25卷 43-49页

作者： Hongwei Ma shaohui li Wei Wei National Key Laboratory of Science and Technology on aero-Engines Collaborative Innovation Center of Advanced Aero-EngineSchool of Energy&Power EngineeringBeihang UniversityBeijing100191 China Beijing Institute of Space Launch Technology Nanyuan Rd.Fengtai Dist.Beijing100076China China Academy of Aerospace Aerodynamics(CAAA) Yungangxi Rd.Fengtai Dist.Beijing100074China

In order to investigate the effects of probe support on the stall characteristics of micro compressors, an experiment was carried out on a large-scale low-speed research compressor according to the principle of geometric similarity. A cylindrical probe support intruding to 50% blade span was mounted at 50% chord upstream from the rotor blade leading edge. The static pressure rise characteristic of the compressor is measured, with and without the probe support respectively. The dynamic compressor behavior from pre-stall to full stall was also measured. The results indicate that the stability margin of the compressor is lowered after installing the probe support. The stall inception is aroused by modal wave disturbances. The disturbances developed into two stall cells smoothly before installing the probe support, while the disturbances first developed into a single stall cell then splitting into two stall cells after installing the probe support. The presence of probe support lowers the initial intensity of the rotating stall of the compressor, while it doesn't alter the intensity of the rotation stall after the compressor enters into full stall.

关键词： Probe support Compressor Stability Margin Stall inception Intensity/frequency of rotating stall

Intrinsic two-way shape memory effect in a Ni-Mn-Sn metamagnetic shape memory microwire

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Journal of Materials Science & Technology 2020年第10期42卷 44-48页

作者： Zhen Chen Daoyong Cong Yin Zhang Xiaoming Sun Runguang li shaohui li Zhi Yang Chao Song Yuxian Cao Yang Ren Yandong Wang Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China X-ray Science Division Argonne National Laboratory Argonne IL 60439 USA

An intrinsic two-way shape memory effect with a fully recoverable strain of 1.0%was achieved in an as-prepared Ni50Mn37.5Sn12.5 metamagnetic shape memory microwire fabricated by Taylor-Ulitovsky *** two-way shape memory effect is mainly owing to the internal stress caused by the retained martensite in austenite matrix,as revealed by transmission electron microscopy observations and highenergy X-ray diffraction *** superelastic training for 30 loading/unloading cycles at room temperature,the amount of retained martensite increased and the recoverable strain of two-way shape memory effect increased significantly to 2.2%.Furthermore,a giant recoverable strain of 11.2%was attained under a bias stress of 300 MPa in the trained *** properties confer this microwire great potential for micro-actuation applications.

关键词： Metamagnetic shape memory alloys Two-way shape memory effect Microwire Recoverable strain Microstructure

Uniqueness of the Gossypium mustelinum Genome Revealed by GISH and 45S rDNA FISH

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Journal of Integrative Plant Biology 2013年第7期55卷 654-662页

作者： Qiong Wu Fang liu shaohui li Guoli Song Chunying Wang Xiangdi Zhang Yuhong Wang David Stelly Kunbo Wang Cotton Research Institute the Chinese Academy of Agricultural Sciences/National Key Laboratory of Cotton Biology Haikou Experimental Station Chinese Academy of Tropical Agricultural Sciences Department of Soil and Crop Sciences Texas A&M UniversityCollege Station

Gossypium mustelinum （（AD）4） is one of five disomic species in Gossypium. Three 45S ribosomal DNA （rDNA） loci were detected in （AD）4 with 45S rDNA as probe, and three pairs of brighter signals were detected with genomic DNA （gDNA） of Gossypium D genome species as probes. The size and the location of these brighter signals were the same as those detected with 45S rDNA as probe, and were named GISH-NOR. One of them was super-major, which accounted for the fact that about one-half of its chromosome at metaphase was located at chromosome 3, and other two were minor and located at chromosomes 5 and 9, respectively. All GISH-NORs were located in A sub-genome chromosomes, separate from the other four allopolyploid cotton species. GISH-NOR were detected with D genome species as probe, but not A. The greatly abnormal sizes and sites of （AD）4 NORs or GISH-NORs indicate a possible mechanism for 45S rDNA diversification following （AD）4 speciation. Comparisons of GISH intensities and GISH-NOR production with gDNA probes between A and D genomes show that the better relationship of （AD）4 is with A genome. The shortest two chromosomes of A sub-genome of G. mustelinum were shorter than the longest chromosome of D sub-genome chromosomes. Therefore, the longest 13 chromosomes of tetraploid cotton being classified as A sub-genome, while the shorter 13 chromosomes being classified as D sub-genome in traditional cytogenetic and karyotype analyses may not be entirely correct.

关键词： Chromosomes cotton Gossypium mustelinum in situ hybridization nucleolar organizer region genome.

Open,Rule-of-Law Thinking Reshapes Chinese Economy

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China Today 2020年第4期69卷 26-28页

作者： li shaohui China Reform Daily

THE fourth plenary session of the 19th CPC Central Committee convened at a critical moment in the process of China’s national rejuvenation,in the year of the 70th anniversary of the founding of the People’s Republic... 详细信息

关键词： significance. founding Economy

Primary analysis of QTG contribution to heterosis in upland cotton

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Chinese Science Bulletin 2010年第26期55卷 2956-2965页

作者： ZHANG Xianliang liU Fang WANG Wei li shaohui WANG ChunYing ZHANG XiangDi WANG YuHong WANG KunBo Cotton Research Institute Chinese Academy of Agricultural Sciences Key Laboratory of Cotton Genetic Improvement Ministry of Agriculture of People's Republic of China Anyang 455000 China Kaifeng Research Academy of Agriculture and Forestry Key Laboratory of Agriculture Biological Breeding Kaifeng 475141 China Yanhai District Agricultural Research Institute of Jiangsu Province Yancheng 224002 China

In this paper, we analyzed the contribution of pure DNA factors to heterosis using quantitative trait genes (QTG) in two randomly selected strains from a recombinant inbred line of Gossypium hirsutum. According to a set of QTL mapping results, combined with analysis of DNA recombinant fragment sources in the two strains and QTL association analysis with their field traits, we hypothesize a view of "dominance + overdominance + epistasis". That is, additive and additive epistasis may be the genetic basis of heterosis, and dominance, overdominance and epistasis may be the modes of heterosis action. Based on the heterosis results of this study, we also suggest a molecular mechanism for heterosis, and explain, in detail, with two randomly selected strains as examples. The male and female parent-derived additive epistatic QTLs of upper half mean length in LG01 and LG03 produced a trait variance of 2.99-3.52 compared with the female parent-derived loci. The trait of bolls per plant was controlled by two pairs of additive epistatic QTLs in LG02 and LG07, which were derived from both female and male parents. The QTLs were reciprocally interacted and produced a trait variance of 0.86. An initial concept of "super-hybrid cotton" was raised according to the nature of additive effect, that is genetic stability.

关键词：杂种优势利用陆地棉 QTL定位数量性状基因重组自交系显性上位遗传基础随机选择

Chemical Scissors Tailored Nano‑Tellurium with High‑Entropy Morphology for Efficient Foam‑Hydrogel‑Based Solar Photothermal Evaporators

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Nano-Micro Letters 2024年第3期16卷 149-168页

作者： Chenyang Xing Zihao li Ziao Wang shaohui Zhang Zhongjian Xie Xi Zhu Zhengchun Peng State Key Laboratory of Radio FrequencyHeterogeneous Integration Shenzhen UniversityShenzhen 518060People’s Republic of China Center for Stretchable Electronics and NanoSensors College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China School of Science and Engineering The Chinese University of Hong KongShenzhenShenzhen 518172People’s Republic of China Institute of Pediatrics Shenzhen Children’s HospitalShenzhen 518038GuangdongPeople’s Republic of China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060People’s Republic of China

The development of tellurium(Te)-based semiconductor nanomaterials for efficient light-to-heat conversion may offer an effective means of harvesting sunlight to address global energy ***,the nanosized Te(nano-Te)materials reported to date suffer from a series of drawbacks,including limited light absorption and a lack of surface ***,we report the preparation of nano-Te by electrochemical exfoliation using an electrolyzable room-temperature ionic ***,cations,and their corresponding electrolytic products acting as chemical scissors can precisely intercalate and functionalize bulk *** resulting nano-Te has high morphological entropy,rich surface functional groups,and broad light *** also constructed foam hydrogels based on poly(vinyl alcohol)/nano-Te,which achieved an evaporation rate and energy efficiency of 4.11 kg m^(−2)h^(−1)and 128%,respectively,under 1 sun ***,the evaporation rate was maintained in the range 2.5-3.0 kg m^(−2)h^(−1)outdoors under 0.5-1.0 sun,providing highly efficient evaporation under low light conditions.

关键词： Tellurium High entropy Electrochemical modification Solar absorption Evaporation rate

Experimental study on the influences of cutter geometry and material on scraper wear during shield TBM tunnelling in abrasive sandy ground

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第2期16卷 410-425页

作者： shaohui Tang Xiaoping Zhang Quansheng liu Qi Zhang Xinfang li Haojie Wang Key Laboratory of Safety for Geotechnical and Structural Engineering of Hubei Province School of Civil EngineeringWuhan UniversityWuhan430072China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan430072China

When shield TBM tunnelling in abrasive sandy ground,the rational design of cutter parameters is critical to reduce tool wear and improve tunnelling ***,the influence mechanism of cutter parameters on scraper wear remains unclear due to the lack of a reliable test *** and material optimisation are often based on subjective experience,which is unfavourable for improving scraper geological *** the present study,the newly developed WHU-SAT soil abrasion test was used to evaluate the variation in scraper wear with cutter geometry,material and *** influence mechanism of cutter parameters on scraper wear has been revealed according to the scratch characteristics of the scraper *** geometry and material parameters have been optimised to reduce scraper *** results indicate that the variation in scraper wear with cutter geometry is related to the cutting resistance,frictional resistance and stress *** appropriate increase in the front angle(or back angle)reduces the cutting resistance(or frictional resistance),while an excessive increase in the front angle(or back angle)reduces the edge angle and causes stress *** optimal front angle,back angle and edge angle for quartz sand samples areα=25°,β=10°andγ=55°,*** wear resistance of the modelled scrapers made of different metal materials is related to the chemical elements and *** wear resistances of the modelled scrapers made of 45#,06Cr19Ni10,42CrMo4 and 40CrNiMoA are 0.569,0.661,0.691 and 0.728 times those made of WC-Co,*** the alloy hardness is less than 47 HRC(or greater than 58 HRC),scraper wear decreases slowly with increasing alloy hardness as the scratch depth of the particle asperity on the metal surface stabilizes at a high(or low)***,when the alloy hardness is between 47 HRC and 58 HRC,scraper wear decreases rapidly with increasing alloy hardness as the scratch depth transitions

关键词： Shield TBM Scraper wear Cutter shape Metal material Alloy hardness

高频超声、显微外科解剖及组织学病理观察离体猪胃壁层次结构的对照分析

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临床超声医学杂志 2024年第2期26卷 95-99页

作者：薛静静王泽城陈永健李少辉吕国荣福建医科大学附属第二医院超声科福建省泉州市362000 福建省泉州医学高等专科学校

目的应用高频超声观察离体猪胃壁分层,分析其与显微外科解剖结构及组织学病理分层的对应关系。方法应用外科手术显微镜、高频超声(探头频率:14 MHz、16 MHz、20 MHz、40 MHz)及组织学病理显微镜观察离体猪胃壁分层;于40 MHz频率超声探... 详细信息

目的应用高频超声观察离体猪胃壁分层,分析其与显微外科解剖结构及组织学病理分层的对应关系。方法应用外科手术显微镜、高频超声(探头频率:14 MHz、16 MHz、20 MHz、40 MHz)及组织学病理显微镜观察离体猪胃壁分层;于40 MHz频率超声探头下观察离体猪胃壁第3层强回声中低回声厚度;清洗刮除离体猪胃壁表面黏液,超声观察胃壁第1层强回声变化;使用发丝分层穿入胃壁组织,观察离体猪胃壁超声表现与显微外科解剖结构及组织学病理分层的对应关系。结果外科手术显微镜下显示,离体猪胃壁自上向下大致分为5层,第1层呈浅粉色,第2层呈略深粉色,第3层呈白色,第4层呈肉橘色,第5层呈白色;超声表现为强-低-强-低-强5层回声,于20~40 MHz频率超声探头下观察离体猪胃壁示第3层强回声中可探及一低回声,其中于40 MHz频率超声探头下测量其厚度为(0.611±0.041)mm,与组织学病理测量的离体猪胃壁黏膜肌层厚度[(0.597±0.027)mm]比较差异无统计学意义(t=0.907,P=0.376);清洗刮除离体猪胃壁表面黏液前、后第1层强回声厚度[(0.052±0.008)cm vs.(0.019±0.003)cm]比较差异有统计学意义(t=12.279,P<0.001)。发丝分层穿入离体猪胃壁组织学病理显示,胃壁黏膜固有层、黏膜下层及肌层中各可见一空洞,与穿过发丝后的超声表现及显微外科解剖结构对应发丝的位置相仿。结论高频超声可较好地显示离体猪胃壁的组织分层,并与显微外科解剖结构及组织学病理分层对应,可为临床诊断胃壁各层病变提供解剖学依据。

关键词：超声检查组织学病理分层显微外科离体胃壁猪

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Stitching Perovskite Grains with Perhydropoly(Silazane)Anti-Template-Agent for High-Efficiency and Stable Solar Cells Fabricated in Ambient Air

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Energy & Environmental Materials 2023年第3期6卷 400-408页

作者： Ting Wang Qu Yang Yanli Chen Qiong Peng Xiaosi Qi Hui Shen Xuncheng liu shaohui li Haixuan Yu Yan Shen Mingkui Wang Xiu Gong College of Physics Guizhou Province Key Laboratory for Optoelectronic Technology and ApplicationGuizhou UniversityGuiyang 550025China College of Graduate Studies Guizhou UniversityGuiyang 550025China College of Materials and metallurgy Guizhou UniversityGuiyang 550025China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

All inorganic CsPbI_(3)perovskite solar cells(PSCs)have emerged as disruptive photovoltaic technology owing to their admirable photoelectric properties and the non-volatile active ***,the phase instability against moisture severely limits the fabrication environment for the high-efficiency devices,breaking through the confinement region to achieve scalable manufacturing has been the primary issue for future ***,we develop a curing-anti-solvent strategy for fabricating high-quality and stable black-phase CsPbI_(3)perovskite films in ambient air by introducing an inorganic polymer perhydropolysilazane(PHPS)into methyl acetate to form anti-template *** cross-linked PHPS reduces moisture erosions while the hydrolyzate silanol network(–Si(OH)_(4)^(–))controls the perovskite crystal growth by forming Lewis adducts with PbI_(2)during the *** polycondensation adduct of Si–O–Si/Si–O–Pb strongly binds to CsPbI_(3)grains as a shield layer to hamper phase *** the inorganic CsPbI_(3)perovskite thin-film with PHPS-modified anti-solvent processing as the light absorber,the n–i–p planar solar cell achieved an efficiency of 19.17%under standard illumination test *** importantly,the devices showed excellent moisture stability,retaining about 90%of the initial efficiency after 1000 h under 30%RH.

关键词： anti-template agent crystal growth perhydropolysilazane perovskite solar cells stability