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| 1 | Ground-temperature controlling effects of duct-ventilated railway embankment in permafrost regions显示文摘Based on observed data from field-testing embankment of the Qinghai-Tibet Railway, ground-temperature controlling effect of duct-ventilated embankment is studied in this paper.The results show that ventilation ducts can effectively cool the soils surrounding the ducts of the embankment, and the heat budget of the ambient soils in a year shows as heat release. Temperature status of the permafrost below the embankment with ducts buried in the relatively high position is similar to that of the common embankment. The permafrost processes warming all along in the two freezing-thawing cycles when the embankment was constructed. However, the temperature of the frozen soils below the embankment, in which the ducts buried in the relatively low position, rises a little in the initial stage. After that, it cools down gradually. At the same time,ventilation ducts can effectively reduce the thermal disturbance caused by the filled soils. The frozen soils below the common embankment and that with high-posited ducts absorb heat all along in the initial two cycles. While the soils below the embankment with low-posited ducts begin to release heat in the second cycle. This phenomenon proves that the ventilation embankment with low-posited ducts shows efficient temperature-controlling effect. Such embankment can actively cool the subgrade soils and therefore keeps the roadbed thermally stable. | NIU Fujun CHENG Guodong YU Qihao | 2004 | Science China Earth Sciences2004，47，z1： | 16 |
| 2 | The application of auto-temperature-controlled ventilation embankment in Qinghai-Tibet Railway显示文摘Auto-temperature-controlled ventilation embankment is an effective engineering measure for 'cooling roadbed'. Practice proves that this new method can sufficiently make use of natural cold energy. It has the advantages of higher efficiency, better cooling effect and feasibility in engineering practice, and wider application in various environment, etc. And also, it is comparatively cheap in project cost. Through practice in the field for half a year, the testing results show that, with the application of auto-temperature-controlled system, the artificial permafrost table has been raised by 65 cm. The artificial permafrost table was basically at the embankment bottom, and the action of freeze-thaw circle on engineering stability was effectively avoided. In the month with highest ground temperature, in the scope with 1-4 m in depth, including the majority of the embankment and the upper part in the original seasonal layer, the ground temperature decreased by 0.7℃. Through thermal flux calculation in the original seasonal layer, in the month with the maximum thermal flux coming into permafrost, it is found that the thermal flux reduces nearly by half. Coming into the cooling period for nearly a month, the ground temperature in entire auto-temperature-controlled embankment is close to zero, and the foundation is at negative temperature. But in a large region in the embankment and foundation the ground temperature was over 0℃ and varied from 0℃ to 0.39℃ in ordinary ventilation embankment. | YU Qihao CHENG Guodong NIU Fujun | 2004 | Science China Earth Sciences2004，47，z1： | 14 |
| 3 | Effective suppression of stimulated Raman scattering in half 10 kW tandem pumping fiber lasers using chirped and tilted fiber Bragg gratings显示文摘The average power of fiber lasers has been scaled deeply into the kW regime in the past years. However, stimulated Raman scattering(SRS) is still a major factor limiting further power scaling. Here, we have demonstrated for the first time, to the best of our knowledge, the suppression of SRS in a half 10 kW tandem pumping fiber amplifier using chirped and tilted fiber Bragg gratings(CTFBGs). With specially self-designed and manufactured CTFBGs inserted between the seed laser and the amplifier stage, a maximum SRS suppression ratio of >15 dB in spectrum is observed with no reduction in laser efficiency. With one CTFBG, the effective output power is improved to3.9 kW with a beam quality M2 factor of ~1.7 from <3.5 k W with an M2 factor of >2; with two CTFBGs, the effective laser power reaches 4.2 kW with an increasing ratio of 20% and an M2 factor of ~1.8, and further power improvement is limited by the power and performance of the 1018 nm pump sources. This work provides an effective SRS suppression method for high-power all-fiber lasers, which is useful for further power scaling of these systems. | MENG WANG ZEFENG WANG LE LIU QIHAO HU HU XIAO XIAOJUN XU | 2019 | Photonics Research2019，7，2： | 11 |
| 4 | Clustering and switching during a semantic verbal fluency test contribute to differential diagnosis of cognitive impairment显示文摘The verbal fluency test (VFT) can be dissociated into 'clustering' (generating words within subcategories) and 'switching' (shifting between clusters), which may be valuable in differential diagnosis. In the current study, we investigated the validity of VFT in the differential diagnosis of Alzheimer's disease (AD, n = 65), vascular dementia (VaD, n = 65), mild cognitive impairment (MCI, n = 92), and vascular cognitive impairment without dementia (VCIND, n = 76) relative to cognitively normal senior controls (NC, n = 374). We found that in the NC group, the total correct score was significantly correlated with age and education; males generated more subcategories; cluster size increased with education, and subcategory and switching decreased with age. A significantly progressive advantage was observed in VFT scores in the sequence NC > MCI/VCIND > AD/VaD, and this significantly discriminated dementia patients from the other groups. AD patients performed better in all four VFT scores than VaD patients. Subcategory and switching scores significantly distinguished AD from VaD patients (AD > VaD; mean difference, 0.50 for subcategory, P <0.05; 0.71 for switching, P <0.05). MCI patients scored higher than VCIND patients, but the difference did not reach statistical significance. These results suggest that semantic VFT is useful for the detection of MCI and VCIND, and in the differential diagnosis of cognitive impairment. | Qianhua Zhao Qihao Guo Zhen Hong | 2013 | Neuroscience Bulletin2013，29，1： | 10 |
| 5 | Comprehensive Management of Daily Living Activities,behavioral and Psychological Symptoms,and Cognitive Function in Patients with Alzheimer's Disease:A Chinese Consensus on Alzheimer's Disease显示文摘Alzheimer's disease(AD)is the most common cognitive disorder in the elderly.Its main clinical manifestations are cognitive decline(C),behavioral and psychological symptoms(B),and a decline in the activities of daily living(A),also known as ABC symptoms.Early identification and evaluation of ABC symptoms are helpful for establishing the accurate diagnosis,comprehensive treatment,and prognosis of AD.To guide Chinese clinical practice for optimization of the comprehensive management of AD,in 2018,The Academy of Cognitive Disorder of China gathered 22 neurologists and gerontologists in China to build a consensus on the comprehensive management of AD.Based on a review of the evidence,the consensus summarizes the pathogenesis,pathological changes,clinical manifestations,evaluation,diagnosis,drug and non-drug treatment,and patient care for AD.Focus group discussion was used to establish a flowchart of comprehensive ABC management for AD patients.The new consensus provides a feasible AD management process for clinicians. | Jianjun Jia Jun Xu Jun Liu Yongjun Wang Yanjiang Wang Yunpeng Cao Qihao Guo Qiuming Qu Cuibai Wei Wenshi Wei Junjian Zhang Enyan Yu | 2021 | Neuroscience Bulletin2021，37，7： | 10 |
| 6 | Refreezing of cast-in-place piles under various engineering conditions显示文摘In the construction of the Qinghai-Tibet Power Transmission Line(QTPTL), cast-in-place piles(CIPPs) are widely applied in areas with unfavorable geological conditions. The thermal regime around piles in permafrost regions greatly affects the stability of the towers as well as the operation of the QTPTL. The casting of piles will markedly affect the thermal regime of the surrounding permafrost because of the casting temperature and the hydration heat of cement. Based on the typical geological and engineering conditions along the QTPTL, thermal disturbance of a CIPP to surrounding permafrost under different casting seasons, pile depths, and casting temperatures were simulated. The results show that the casting season(summer versus winter) can influence the refreezing process of CIPPs, within the first 6 m of pile depth. Sixty days after being cast, CIPPs greater than 6 m in depth can be frozen regardless of which season they were cast, and the foundation could be refrozen after a cold season. Comparing the refreezing characteristics of CIPPs cast in different seasons also showed that, without considering the ground surface conditions, warm seasons are more suitable for casting piles. With the increase of pile depth, the thermal effect of a CIPP on the surrounding soil mainly expands vertically, while the lateral heat disturbance changes little. Deeper, longer CIPPs have better stability. The casting temperature clearly affects the thermal disturbance, and the radius of the melting circle increases with rising casting temperature. The optimal casting temperature is between 2 °C and 9 °C. | Lei Guo QiHao Yu XiaoNing Li XinBin Wang YongYu Yue | 2015 | Research in Cold and Arid Regions2015，7，4： | 8 |
| 7 | Heat transfer process of roadway embankments with different type and width of road surface in permafrost regions显示文摘自从它被热条件管理,在永久冻土区域的路基的稳定性在当前的气候变化下面在这些区域与高速公路,高速公路和铁路的快速的开发和建设成为了一颗大担心,或换句话说,在堤的热转移过程。我们执行了有限元素分析在堤热转移过程上分析道路表面的不同类型的效果和堤的宽度的效果。结果显示在有沥青表面的车道堤的底部的吝啬的年度热转移率与沙的石子表面是乘那的 3。当沥青表面的宽度被加倍时,这意味着转移率增加了 60% 的年度热。增加的热转移率主要在堤的底部被定位并且导致了热集中的效果,导致到差不多 1.6 次的永久冻土的降级。增加的堤高度不减少热转移率的这些增加,这也被发现。因此,两沥青道路表面和增加的堤宽度能在车道堤导致加强的热转移率,因而 degradating 内在的永久冻土和堤不稳定性。 | YU Qihao PAN Xicai CHENG Guodong BAI Yang | 2007 | Progress in Natural Science:Materials International2007，17，3： | 7 |
| 8 | Numerical analysis of applying special pavements to solve the frost heave diseases of high-speed railway roadbeds in seasonally frozen ground regions显示文摘The Haerbin-Dalian Passenger Dedicated Line is the first high-speed railway constructed in the seasonally frozen ground regions of northeastern China. Frost heave diseases occurred in the first winter of its operation(between October 2012 and January 2013), and frost heave was observed mainly in the roadbed fills that were considered not susceptible to frost heave. This paper proposes applying two special pavements — black pavement and insulation-black pavement — to improve the thermal regime of the roadbed. Three numerical models of the roadbed temperature field were built based on the field conditions of the Changchun section(D3K692+840 to D3K692+860). The results show that:(1) Compared with cement pavement, black pavement and insulation-black pavement could reduce the freezing index at the roadbed surface by 37% and 64%, respectively, which could influence the maximum frozen depth;(2) the maximum frozen depths under the black pavement and insulation-black pavement were respectively 1.3–1.4 m and 1 m. Compared with cement pavement, they could reduce the maximum frozen depth by 0.4 m and 0.7–0.8 m, respectively, which would reduce the permitted amount of frost heave by 4 mm and 7–8 mm, which would meet the deformation limit established by the Code for Design on Special Subgrade of Railway;(3) the freezing periods of the black pavement and the insulation-black pavement were, respectively, approximately four months and two months. Compared with cement pavement, they could reduce the freezing period by approximately 19 days and 40 days, respectively, and delay the initial freezing time by 9 days and 18 days; and(4) compared with cement pavement, black pavement and black-insulation pavement could reduce the frozen areas of roadbeds in the cold season, which suggests that these two special pavements could provide better thermal stability for roadbeds. | Chang Yuan FuJun Niu QiHao Yu XinBin Wang Lei Guo YanHui You | 2015 | Research in Cold and Arid Regions2015，7，4： | 5 |
| 9 | Microstructure and composition engineering Yb single-filled CoSb_(3) for high thermoelectric and mechanical performances显示文摘A broad tunability of the thermoelectric and mechanical properties of CoSb_(3) has been demonstrated by adjusting the composition with the addition of an increasing number of elements.However,such a strategy may negatively impact processing repeatability and composition control.In this work,singleelement-filled skutterudite is engineered to have high thermoelectric and mechanical performances.Increased Yb filling fraction is found to increase phonon scattering,whereas cryogenic grinding contributes additional microstructural scattering.A peak zT of 1.55 and an average zT of about 1.09,which is comparable to the reported results of multiple-filled SKDs,are realized by the combination of simple composition and microstructure engineering.Furthermore,the mechanical properties of Yb single-filled CoSb_(3) skutterudite are improved by manipulation of the microstructure through cryogenic grinding.These findings highlight the realistic prospect of producing high-performance thermoelectric materials with reduced compositional complexity. | Zhenxing Zhou Matthias T.Agne Qihao Zhang Shun Wan Qingfeng Song Qing Xu Xiaofang Lu Shijia Gu Yuchi Fan Wan Jiang Gerald Jeffrey Snyder Lianjun Wang | 2019 | Journal of Materiomics2019，5，4： | 4 |
| 10 | Neuropsychological features in post-stroke cognitive impairment with no dementia patients with different Traditional Chinese Medicine syndromes显示文摘OBJECTIVE: To investigate neuropsychological features of post-stroke cognitive impairment with no dementia(PSCIND) patients with different Traditional Chinese Medicine(TCM) syndromes.METHODS: We recruited 50 patients with PSCIND between April 2012 and March 2013. Patients were divided into different groups according to TCM classifications. Patients were assessed using neuropsychological tests, including cognitive screening(mini-mental state examination), memory testing (auditory verbal learning test), executive/attention[shape trails test, stroop color-word test(SCWT),reading the mind in the eyes test, the digit ordering test-A(DOT-A), and symbol digit modalities test], language(action naming test, Boston naming test, famous face test, similarity test, and verbal fluency test), and visuospatial functioning [complex figure test(CFT)].RESULTS: We found no significant differences between patients with and without a diagnosis of turbid phlegm blocking the upper orifices on neuropsychological test performance. Patients diagnosed with upper hyperactivity of liver Yang syndrome scored significantly lower on the SCWT-C executive test and the CFT-delayed recall memory test. Patients with excess syndrome scored significantly lower on the SCWT-C executive test, and significantly higher on the DOT-A executive test.CONCLUSION: Neuropsychological characteristics differ between PSCIND patients with different TCM classifications. | Ma Jie Wang Yu Zhang Yunyun Guo Qihao Zhen Xiaomin Shi Moyi | 2019 | Journal of Traditional Chinese Medicine2019，39，1： | 4 |
| 11 | Superior performance and high service stability for Ge Te-based thermoelectric compounds显示文摘GeTe-based compounds have been intensively studied recently due to their superior thermoelectric performance,but their real applications are still limited so far due to the drastic volume variation that occurs during the rhombohedral–cubic phase transition,which may break the material or the material/electrode interface during service.Here,superior performance and high service stability for GeTe-based thermoelectric compounds are achieved by co-doping Mg and Sb into GeTe.The linear coefficient of thermal expansion before phase transition is greatly improved to match that after phase transition,yielding smooth volume variation around the phase transition temperature.Likewise,co-doping(Mg,Sb)in GeTe successfully tunes the carrier concentration to the optimal range and effectively suppresses the lattice thermal conductivity.A peak z T of 1.84 at 800 K and an average z T of 1.2 in 300–800 K have been achieved in Ge0.85Mg0.05Sb0.1Te.Finally,a Ni/Ti/Ge0.85Mg0.05Sb0.1Te thermoelectric uni-leg is fabricated and tested,showing quite good service stability even after 450 thermal cycles between 473 K and 800 K.This study will accelerate the application of GeTe-based compounds for power generation in the mid-temperature range. | Tong Xing Qingfeng Song Pengfei Qiu Qihao Zhang Xugui Xia Jincheng Liao Ruiheng Liu Hui Huang Jiong Yang Shengqiang Bai Dudi Ren Xun Shi Lidong Chen | 2019 | National Science Review2019，6，5： | 4 |
| 12 | Marine sponges of the genus Stelletta as promising drug sources: chemical and biological aspects显示文摘Marine sponges of the genus Stelletta are well known as rich sources of diverse and complex biologically relevant natural products, including alkaloids, terpenoids, peptides, lipids, and steroids. Some of these metabolites, with novel structures and promising biological activities, have attracted a lot of attention from chemists seeking to perform their total synthesis in parallel to intensive biological studies towards new drug leads. In this review, we summarized the distribution of the chemically investigated Stelletta sponges, the isolation, synthesis and biological activities of their secondary metabolites, covering the literature from 1982 to early 2018. | Qihao Wu Bastien Nay Min Yang Yeke Ni Hong Wang Ligong Yao Xuwen Li | 2019 | Acta Pharmaceutica Sinica B2019，9，2： | 3 |
| 13 | Overview on the recent study of antimicrobial peptides: Origins, functions, relative mechanisms and application显示文摘 | Yanmei Li Qi Xiang Qihao Zhang Yadong Huang Zhijian Su | 2012 | Peptides2012，，2： | 3 |
| 14 | Seasonal variations in the relationship between landscape pattern and land surface temperature in Indianapolis, USA显示文摘 | Hua Liu Qihao Weng | 2008 | Environmental Monitoring and Assessment2008，，1： | 2 |
| 15 | Uncommon Polycyclic Merosesquiterpenoids and Asteriscanoids from the Hainan Soft Coral Sinularia hurnesi显示文摘A rare highly fused racemic merosesquiterpenoid,9-epi-verrubenzospirolactone(1),six new asteriscane-type sesquiterpenoids,sinuhumesins A-F(4-9),and two related known ones(10 and 11)were isolated from Hainan soft coral Sinularia humesi.Compound 1 was further separated by chiral HPLC resolution to one pair of enantiomers[(+)-1 and(-)-1],respectively.The full structures of the new compounds were unambiguously determined by extensive spectroscopic analysis,chemical computation approaches,modified Mosher's method and/or X-ray diffract!on analysis,as well as comparison with previously reported data of related model compounds. | Zi-Hui Chen Li-Gong Yao Qihao Wu Yue-Wei Guo | 2021 | Chinese Journal of Chemistry2021，39，9： | 2 |
| 16 | Land use change analysis in the Zhujiang Delta of China using satellite remote sensing, GIS and stochastic modelling显示文摘 | Qihao Weng | 2001 | Journal of Environmental Management2001，，3： | 2 |
| 17 | A Novel MILP Model Based on the Topology of a Network Graph for Process Planning in an Intelligent Manufacturing System显示文摘Intelligent process planning(PP)is one of the most important components in an intelligent manufacturing system and acts as a bridge between product designing and practical manufacturing.PP is a nondeterministic polynomial-time(NP)-hard problem and,as existing mathematical models are not formulated in linear forms,they cannot be solved well to achieve exact solutions for PP problems.This paper proposes a novel mixed-integer linear programming(MILP)mathematical model by considering the network topology structure and the OR nodes that represent a type of OR logic inside the network.Precedence relationships between operations are discussed by raising three types of precedence relationship matrices.Furthermore,the proposed model can be programmed in commonly-used mathematical programming solvers,such as CPLEX,Gurobi,and so forth,to search for optimal solutions for most open problems.To verify the effectiveness and generality of the proposed model,five groups of numerical experiments are conducted on well-known benchmarks.The results show that the proposed model can solve PP problems effectively and can obtain better solutions than those obtained by the state-ofthe-art algorithms. | Qihao Liu Xinyu Li Liang Gao | 2021 | Engineering2021，7，6： | 2 |
| 18 | Thermal infrared remote sensing for urban climate and environmental studies: Methods, applications, and trends显示文摘 | Qihao Weng | 2009 | ISPRS Journal of Photogrammetry and Remote Sensing2009，，4： | 2 |
| 19 | Problems and countermeasures in construction of transmission line projects in permafrost regions显示文摘Construction of power transmission lines is becoming an important part of permafrost engineering in China.This paper reviews the construction status and problems of transmission lines in different countries,as well as corresponding solutions that would be of practical significance for sustainable engineering practices.Russia has the longest history of transmission line construction in permafrost areas,with transmission lines(mainly 220 kV and 500 kV) spanning approximately 100,000 km.However,all countries suffer from permafrost-related tower foundation stability problems caused by freezing-thawing hazards such as frost heave and thaw settlement,frost lifting,and harmful cryogenic phenomena.As point-line transmission line constructions,the lines,poles and towers should be reasonably selected and installed with a comprehensive consideration of frozen soil characteristics to effectively reduce the occurrence of freezing-thawing disasters.Reinforced concrete pile foundations are widely used in the permafrost regions,and construction in winter is also a universal practice.Moreover,facilitating engineering measures like thermosyphons are an effective way to reduce freezing-thawing hazards and to maintain the stability of tower foundations. | GuoShang Wang QiHao Yu YanHui You Ze Zhang Lei Guo ShiJun Wang Yong Yu | 2014 | Research in Cold and Arid Regions2014，6，5： | 2 |
| 20 | Estimation of land surface temperature–vegetation abundance relationship for urban heat island studies显示文摘 | Qihao Weng Dengsheng Lu Jacquelyn Schubring | 2003 | Remote Sensing of Environment2003，，4： | 2 |
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