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| 1 | Stable classi?cation with limited sample: transferring a 30-m resolution sample set collected in 2015 to mapping 10-m resolution global land cover in 2017显示文摘As the world strives to reduce the impact of population growth, urbanization, agricultural expansion, and climate change on food security, energy and water shortage, resource over-exploration, biodiversity loss, environmental pollution, and ultimately human health, timely and higher resolution land cover information is urgently needed to achieve the sustainable development goals of the United Nations. | Peng Gong Han Liu Meinan Zhang Congcong Li Jie Wang Huabing Huang Nicholas Clinton Luyan Ji Wenyu Li Yuqi Bai Bin Chen Bing Xu Zhiliang Zhu Cui Yuan Hoi Ping Suen Jing Guo Nan Xu Weijia Li Yuanyuan Zhao Jun Yang Chaoqing Yu Xi Wang Haohuan Fu Le Yu Iryna Dronova Fengming Hui Xiao Cheng Xueli Shi Fengjin Xiao Qiufeng Liu Lianchun Song | 2019 | Science Bulletin2019，64，6： | 166 |
| 2 | Vulnerability assessment of areas affected by Chinese cryospheric changes in future climate change scenarios显示文摘Using the definition of vulnerability provided by the Intergovernmental Panel on Climate Change,this paper assesses the vulnerability of areas affected by Chinese cryospheric changes from 2001 to 2020 and from 2001 to 2050 in A1 and B1scenarios.Seven indices are used in the vulnerability assessment:glacial area fraction,interannual variability of permafrost depth,interannual variability of surface snow area fraction,interannual variability of surface runoff,interannual variability of surface temperature,interannual variability of vegetation growth,and interannual variability of the human development index.Assessment results show that the overall vulnerability of the studied areas in China increases from east to west.The areas in the middle and eastern parts of China are less vulnerable compared with western parts and parts of the Tibetan Plateau.The highest vulnerability values are found from 1981 to 2000,and the least ones are found from 2001 to 2050.The vulnerable areas increase from the period of 1981 to 2000 to the period of 2001 to 2050,and the less vulnerable areas decrease.The highly vulnerable areas increase from the period of 1981 to 2000 to the period of 2001 to 2020 and then decrease from the period of 2001 to 2020 to the period of 2001 to 2050.This decrease in vulnerability is attributed to the decrease in exposure and sensitivity to Chinese cryospheric changes along with a concomitant increase in adaptation. | HE Yong WU YongFeng LIU QiuFeng | 2012 | Chinese Science Bulletin2012，57，36： | 18 |
| 3 | Effectiveness of Jinying capsule on pelvic inflammatory disease in patients with symptom pattern of damp and heat accumulation: a double-blinded, multicenter, randomized, placebo-controlled clinical trial显示文摘OBJECTIVE: To evaluate the therapeutic effectiveness and safety of Jinying capsule on pelvic inflammatory disease(PID) in patients with symptoms identified as the pattern of damp and heat accumulation in terms of Traditional Chinese Medicine(TCM).METHODS: We conducted a double-blinded, multicenter, randomized, placebo-controlled clinical trial which included 155 patients diagnosed with PID and identified as symptom pattern of damp and heat accumulation. They were randomly divided into experimental group(n = 78) and control group(n = 77) according to a random number table. The treatment lasted for a period of 28 d. The experimental group was given Jinying capsules and oral levofloxacin plus oral metronidazole for first 7 d.They continued with Jinying capsules and levofloxacin placebo and metronidazole placebo for another 7 d. For the remaining 14 d, they continued with Jinying capsules only. Whereas, the control group was treated with oral levofloxacin and metronidazole and Jinying capsule placebo for the first 14 d in the same way as the experimental group and then continued with Jinying capsule placebo only for the remaining 14 d. The clinical efficacy was assessed using McCormack scale, TCM symptom pattern scores, physicochemical indexes including white blood cell and erythrocyte sedimentation rate, C-reaction protein, smear of vaginal discharge,and pelvic ultrasound.RESULTS: Comparing McCormack scale between both groups after treatment, the difference in curative effect between both groups was significant (P = 0.0269). The cure rate of the experimental group and control group is 76.32% and 59.46% respectively at week 4. Comparing TCM symptom pattern scores between both groups before and after treatment, the differences in total effective rate were both significant(P < 0.05). The curative effect rate of experimental group is 2.63% and 13.70% of the control group at week 1(P = 0.0131), and73.33% of the experimental group and 56.94% of the control group at week 4(P = 0.0369). No significant differences were found between the two groups on the Physicochemical indexes(all P >0.05). No adverse events or reactions occurred in the experimental groups.CONCLUSION: Jinying capsule can reduce the dosage of antibiotics needed for PID treatment, and improve the symptoms in PID patients. | Yang Yan Lu Yao Zhou Deping Pei Fenglan Li Qin Chen Shuqiong Wang Qiufeng Wang Yanting Jin Zhe Liu Yanxia | 2020 | Journal of Traditional Chinese Medicine2020，40，3： | 10 |
| 4 | Multilayer YAG/Re:YAG/YAG laser ceramic prepared by tape casting and vacuum sintering method显示文摘 | Fei Tang Yongge Cao Jiquan Huang Wang Guo Huagang Liu Qiufeng Huang Wenchao Wang | 2012 | Journal of the European Ceramic Society2012，，16： | 1 |
| 5 | Effects of a multi-enzyme complex on growth performance,nutrient utilization and bone mineralization of meat duck显示文摘Background:Previous studies with broiler have shown dietary supplementation with multi-enzyme complex containing non-starch polysaccharides(NSP) degrading enzymes and phytase is efficient in releasing phosphorus(P),calcium(Ca),energy and amino acids from corn-soybean meal diets or corn-sorghum diets,hence compensating considerable levels of nutrients in formulation.Notwithstanding,such potentials have not been well defined in duck nutrition.Giving China being the largest duck producing country,we conducted this study to establish adequate specifications of major nutrients along with multi-enzyme complex to meat duck from day-old to slaughter,focusing on performance,utilization of nutrients and bone mineralization.Five dietary treatments were:Positive control(PC,T1):the nutrients concentration of diet for 1 to 14 d of age were apparent metabolizable energy(AME) 2,800 kcal/kg,crude protein(CP)19.39%,Ca 0.85%,available phosphorus(avP) 0.42%;for 15 to 35 d of age these parameters were AME2,900 kcal/kg,CP 16.47%,Ca 0.76%,avP 0.38%;Negative control 1(NC1,T2),the AME and digestible amino acids(DAA)were reduced by 70 kcal/kg and 2.0%,avP and Ca by 1.0 g/kg from PC diet;Negative control 2(NC2T4),the downspec from PC diet was AME 100 kcal/kg,DAA 2.5%,avP 1.5 g/kg and Ca 1.2 g/kg;The enzyme complex was added at the same dosage(200 ml7 1,000 kg) on NCI(T3) and NC2(T5) diets.Results:Comparing with the ducks fed on T1,T3 and T5 diets,the birds fed on NC2 diet showed the lowest(P < 0.05)body weight(d 14 and 35),feed intake(d 35),tibia ash,Ca and P contents(d 14 and 35),and the utilization of nutrients(P< 0.05).The supplementation with the enzyme complex to the NC diets restored growth rate,utilization of nutrients and bone mineralization to the level of the PC diet,and increased AME by 60 kcal/kg and117 kcal/kg,respectively for the NCI and NC2 diets.Conclusion:These results suggest that down-spec AME by 100 kcal/kg,DAA by 2.5%,avP by 1.5 g/kg and Ca by1.2 g/kg caused detrimental effects on duck performance compared with those fed on the PC diet,and these performance losses can be compensated by the addition of the multiple-enzyme complex. | Qiufeng Zeng Xueqin Huang Yuheng Luo Xuemei Ding Shiping Bai Jianping Wang Yue Xuan Zhuowei Su Yonggang Liu Keying Zhang | 2015 | Journal of Animal Science and Biotechnology2015，6，4： | 1 |
| 6 | Hydrogen peroxide-induced apoptosis in human gastric carcinoma MGC803 cells显示文摘 | Yubin Mao Gang Song Qiufeng Cai Min Liu Haohong Luo Mingxin Shi Gaoliang Ouyang Shideng Bao | 2006 | Cell Biology International2006，，4： | 1 |
| 7 | Unsupervised language model adaptation for handwritten Chinese text recognition显示文摘 | Wang Qiufeng Yin Fei Liu Chenglin | 2014 | Pattern Recognition2014，47，3： | 1 |
| 8 | Color-tunable Ca10Na(PO4)7:Ce^3+/Tb^3+/Mn^2+ phosphor via energy transfer显示文摘A series of Ca_(10)Na(PO_4)_7:Ce^(3+)/Tb^(3+)/Mn^(2+)(CNPO:Ce^(3+)/Tb^(3+)/Mn^(2+)) phosphors with high brightness were synthesized by high-temperature solid-state method. X-ray diffraction(XRD), scanning electron microscopy(SEM), diffuse reflectance spectra(DRS), photo luminescence(PL) spectra, luminescence decay curves and thermally stability were performed to characterize the as-prepared samples. For Ce^(3+)-doped samples, an intense and broad band emission is present under 265 nm excitation. When Ce^(3+) and Tb^(3+)are codoped, energy transfer(ET) process from Ce3+ to Tb3+ is demonstrated with electric dipole-dipole interaction. The internal and external quantum efficiencies(QEs) of CNPO:0.15 Ce^(3+), 0.04 Tb^(3+), 0.005 Mn^(2+)are measured to 76.79% and 54.11% under 265 nm excitation and temperature-dependent PL intensity can remain 51.78% at 150 ℃ of its initial intensity at 25 ℃. It is indicated that single-phased white lightemitting CNPO:Ce^(3+)/Tb^(3+)/Mn^(2+) phosphor can serve as a promising phosphor for illumination devices. | Jingru Sun Ping Huang Yongfu Liu Lei Wang Cai'e Cui Qiufeng Shi Yue Tian | 2018 | Journal of Rare Earths2018，36，6： | 0 |
| 9 | Performance Analysis of the IEEE 802.15.3 CSMA/CA in Unsaturated Traffic Conditions显示文摘 | LIU Xin DAI Qionghai WU Qiufeng | 2008 | Chinese Journal of Electronics2008，17，2： | 0 |
| 10 | An Interactive Online Platform for Algorithms Teaching显示文摘Learning programming has become an important part of education.However,most students have extreme difficulty learning programming and complex algorithms.This is because programming has a hierarchical logic.Solving complex problems requires students to develop skills in decomposing problems.To this end,this paper describes an effective method to develop an online platform for teaching complex algorithms. | Wenhao Zhou Lin Liu Qiufeng Wang Yusen Wu Xuchen Wang Jia Wang | 2022 | 计算机教育2022，，12： | 0 |
| 11 | Structural Monetary Policy, Bank Credit and Bank Liquidity—An Empirical Analysis Based on VAR Model显示文摘After the outbreak of the international financial crisis,the People’s Bank of China,based on traditional monetary policy tools,launched a series of structural monetary policy tools such as standing lending facility(SLF),medium-term lending facility(MLF),and pledged supplementary lending(PSL)and targeted at liquidity via the commercial banking system.In order to test the credit transmission effect of structured monetary policy,this paper empirically analyzes the relationship between structured monetary policy,bank liquidity and bank credit based on the VAR model.The research shows that the implementation of structured monetary policy reduces the liquidity of commercial banks in the short term and increases in loans to small or micro enterprises and agriculture-related loans,these policies have produced significant short-term effects on credit transmission in steady of long-term effects.Thus,a series of supporting measures are needed to fully exert the effects of structural monetary policy. | PAN qiufeng LIU xinghua | 2021 | Economics World2021，9，1： | 0 |
| 12 | Effects of Nitric Oxide on Growth and Sensitivity of Human Glioma A172 Cells to ^(60)Co and X-ray Radiation显示文摘Nitric oxide (NO)has been implicated both in regression and progression of tumors due to its production by both tumor cells and infiltrating lymphocytes. Ionizing radiation causes the regression of tumors, and can augment the production of NO by macrophages in vitro. The authors examined the effect of nitric oxide (NO) generating agent sodium nitroprusside (SNP) on the growth and radiosensitivity of cultured glioma A172 cells to ^60Co or X-ray radiation. | Qiu Rong, Liu Bing, Guo Chuanling, Li Wenjian, Ma Qiufeng and Li Sha | 2003 | 近代物理研究所和兰州重离子加速器实验室年报:英文版2003，，1： | 0 |
| 13 | Optical,thermal,and mechanical properties of(Y_(1−x)Scx)_(2)O_(3)transparent ceramics显示文摘Sesquioxides such as Y_(2)O_(3)and Sc_(2)O_(3)are important optical materials,but the fabrication of their transparent ceramics remains a challenge due to the ultra-high melting point of over 2400℃.In this work,a series of(Y_(1−x)Scx)_(2)O_(3)transparent ceramics were successfully fabricated by a simple vacuum sintering process without any sintering additives,and the effect of scandium(Sc)content(x)on the crystal structure and optical/thermal/mechanical properties was evaluated.Y_(2)O_(3)and Sc_(2)O_(3)form a complete solid solution with a cubic bixbyite structure.The formation of(Y_(1−x)Scx)_(2)O_(3)solid solution promotes the densification of ceramics,leading to the realization of high transparency close to the theoretical transmittance over a wide wavelength range of 0.35–8μm.In particular,the in-line transmittance in the range of 0.6–6μm remains above 80%for(Y_(1−x)Scx)_(2)O_(3)with x=0.23–0.31,while the pristine Y_(2)O_(3)and Sc_(2)O_(3)are opaque.Moreover,the mechanical properties including Vickers hardness(HV),fracture toughness(KIC),and biaxial flexural strength(δb)are evidently enhanced due to the solid solution strengthening,while the thermal conductivity(k)is reduced due to the reduction of photon free path.This study demonstrates that forming of solid solution is a facile and universal approach for preparing sesquioxide transparent ceramics with high optical and mechanical quality. | Changliang YANG Jiquan HUANG Qiufeng HUANG Zhonghua DENG Yun WANG Xiaoyun LI Zehua ZHOU Jian CHEN Zhuguang LIU Wang GUO | 2022 | Journal of Advanced Ceramics2022，11，6： | 0 |
| 14 | Analysis and performance test on dynamic seed corn threshing and conveying process with variable diameter and spacing显示文摘In order to further reduce the damage rate in threshing seed corn,a seed corn threshing testbed with variable diameter and spacing that can realize dynamic adjustment of parameters,such as feed quantity,rotating speed of the threshing device,threshing spacing of the threshing units,was designed in this research.The software of finite element analysis ANSYS Workbench was applied to do modal analysis on the threshing axis designed for variable diameter and spacing of seed corn.The first 8 orders of natural frequencies were distributed in 201.12-1640.20 Hz,with corresponding vibration amplitude in 5.86-27.04 mm,showing reasonable structural design of the threshing axis,which could realize effective seed corn threshing and conveying.Discrete element method was applied to do simulation analysis on the seed corn threshing and conveying process with variable diameter and spacing.Under the condition of different feed quantity,different rotating speed of the thresher,the moving speed of corn clusters and contact force among clusters were measured through simulation,and the working characteristics of the threshing testbed for low-damage and dynamic threshing and conveying of seed corn with variable diameter and spacing were revealed.Working performance test results of the testbed of seed corn with variable diameter and spacing showed that,when the rotating speed of the threshing axis was 190-290 r/min,feed quantity was 1.80-3.80 kg/s,the damage rate of seed corn was 0.32%-0.63%,threshing rate was 99.20%-99.82%,and content impurity rate was 4.23%-5.86%,the mass of threshed corn grains first increased and then decreased along the axial direction.The test verification process was in line with the simulation results;thus,the test results could satisfy the requirements in design and actual operation. | Fei Dai Yiming Zhao Yuanxiang Liu Ruijie Shi Shanglong Xin Qiufeng Fu Wuyun Zhao | 2023 | International Journal of Agricultural and Biological Engineering2023，16，2： | 0 |
| 15 | Spatial-temporal Variation Characteristics of Sunshine Duration in China and Its Influence Factors显示文摘Sunshine duration has an important impact on agriculture.In order to study the temporal and spatial variation of sunshine duration in China under the background of climate change,based on the observation data of 2089 national meteorological stations during 1961-2017,trend analysis,mutation analysis,partial correlation analysis,and Mann-Kendall mutation analysis were used to analyze the temporal and spatial variation characteristics of sunshine duration in different regions of China,and the influence of main climatic factors and human activities.The results showed that:the sunshine duration in China showed a significant decreasing trend with a rate of-45.8 h/10 a,and the sunshine duration in 7 regions of Northwestern China,Northern China,Northeastern China,Center China,Eastern China,Southern China,and Southwestern China also showed a significant decrease.The spatial distribution of sunshine duration in China was characterized by'less in the south and more in the north',and the sunshine duration in the northern region was significantly higher than those in the southern region.The sunshine duration in Tibet,Qinghai,Gansu and west Inner Mongolia was higher,while it was obviously lower in Sichuan Basin.Through M-K mutation test analysis,it was found that sunshine duration in the whole country decreased significantly,but there was no mutation station,while mutation occurred at 1989 in Southwestern China,1983 in Northwestern China,1985 in Northeastern China.Seasonally,there was the highest sunshine duration in summer,followed by spring,autumn,and winter;the decline rate was also the highest in summer,followed by autumn,winter,and spring.Sunshine duration had a highly negative correlation with total cloud amount,visibility,haze,and precipitation,while had a strongly positive correlation with wind speed,and had no significant correlation with fog. | Fengjin XIAO Xuguang ZHANG Yaoming LIAO Qiufeng LIU | 2020 | Meteorological and Environmental Research2020，11，6： | 0 |
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