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| 1 | Monitoring lake changes of Qinghai-Tibetan Plateau over the past 30 years using satellite remote sensing data显示文摘During the years 2006–2009,lakes in the Qinghai-Tibetan Plateau(QTP)were investigated using satellite remote sensing strategies.We report the results of this investigation as well as follow-up research and expanded work.For the investigation,we mainly focused on lakes whose areas are more than 1 km2.The remote sensing data that we used included 408 scenes of CBERS CCD images and 5 scenes of Landsat ETM?images in Qinghai Province and Tibet Autonomous Region.All these data were acquired around years 2005–2006.Besides remote sensing images,we also collected 1,259 topographic maps.Numbers and areas of lakes were analyzed statistically,which were then compared with those coming from the first lake investigation(implemented between the1960s and 1980s).According to our investigation,up to and around year 2005–2006,the total number of lakes in the QTP was 1,055(222 in Qinghai and 833 in Tibet),accounting for more than 30%of that of China.Thirty newborn lakes with area[1 km2were found,and 5 dead lakes with initial area[1 km2were also found.Among those 13 big lakes([500 km2),Yamzhog Yumco had seriously shrunk,and it has continued to shrink in recent years;Qinghai Lake had shrunk during the period,but some new researches indicated that it has been expanding since the year 2004;Siling Co,Nam Co,and Chibuzhang Co had expanded in the period.We divided the newborn lakes into six categories according to their forming reasons,including river expansion,wetland conversion,etc.The changes of natural conditions led to the death of four lakes,and human exploitation was the main reason for the death of Dalianhai Lake in Qinghai.We picked out three regions which were sensitive to the change of climate and ecological environment:Nagqu Region,Kekexili Region,and the source area of the Yellow River(SAYR).Lakes in both Nagqu and Kekexili have been expanded;meanwhile,most lakes in the SAYR have obviously been shrunk.These regional patterns of lake changes were highly related to variations of temperature,glacier,precipitation,and evaporation.Our investigation and analysis will provide references for researches related to lake changes in the QTP and the response to climate fluctuations. | Wei Wan Pengfeng Xiao Xuezhi Feng Hui Li Ronghua Ma Hongtao Duan Limin Zhao | 2014 | Chinese Science Bulletin2014，59，10： | 22 |
| 2 | The role of β18-β19 loop structure in insecticidal activity of Cry1Ac toxin from Bacillus thuringiensis显示文摘The β18-β19 loop in domain III of Cry1Ac toxin is unique among Bacillus thuringiensis Cry proteins. In this study, the role of the loop structure in insecticidal activity of Cry1Ac toxin was investigated. Alanine scanning mutations within the loop were initially generated and most mutants were over-expressed and reduced toxicity at different degrees, except mutant N546A that showed almost 2 times enhanced toxicity against Helicoverpa armigera larvae. Further mutagenic analysis of N546 revealed that a charged amino acid in this position would cause very unfavorable influence on insecticidal activity. In addition, the deletion of N546 led to protein instability because of destruction of the loop integrity. Besides, mutant W544F was much more toxic than W544Y, indicating that hydrophobic nature of the position was important for maintaining the stability and activity of Cry1Ac protein. These findings are the first biological evidence for a structural function of β18-β19 loop in insecticidal activity of the Cry1Ac toxin. | XIA LiQiu WANG FaXiang DING XueZhi ZHAO XinMin FU ZuJiao QUAN MeiFang YU ZiNiu | 2008 | Chinese Science Bulletin2008，53，20： | 4 |
| 3 | Surface Roughness and Roundness of Bearing Raceway Machined by Floating Abrasive Polishing and Their Effects on Bearing's Running Noise显示文摘As the two most important indexes of bearing raceway,surface roughness and roundness have significant influence on bearing noise.Some researchers have carried out studies in this field,however,reason and extent of the influence of raceway surface geometric characteristics on bearing running noise are not perfectly clear up to now.In this paper,the raceway of 6309 type bearing’s inner and outer ring is machined by floating abrasive polishing adopting soft abrasive pad.Surface roughness parameters,arithmetical mean deviation of the profile Ra,the point height of irregularities Rz,maximum height of the profile Rmax and roundness f of raceways,are measured before and after machining,and the change rules of the measured results are studied.The study results show that the floating abrasive polishing can reduce the surface geometric errors of bearing raceway evidently.The roundness error is reduced by 25%,Rmax value is reduced by 35.5%,Rz value is reduced by 22%and Ra value is reduced by 5%.By analyzing the change of the geometrical parameters and the shape difference of the raceway before and after machining,it is found that the floating abrasive polishing method can affect the roundness error mainly by modifying the local deviation of the raceway’s surface profile.Bearings with different raceway surface geometrical parameter value are assembled and the running noise is tested.The test results show that Ra has a little,Rmax and Rz have a measurable,and the roundness error has a significant influence on the running noise.From the viewpoint of controlling bearings’running noise,raceway roundness error should be strictly controlled,and for the surface roughness parameters,Rmax and Rz should be mainly controlled.This paper proposes an effective method to obtain the low noise bearing by machining the raceway with floating abrasive polishing after super finishing. | PANG Guibing QI Xuezhi MA Qinyi ZHAO Xiujun WEN Chunsheng XU Wenji PENG Yanping | 2014 | Chinese Journal of Mechanical Engineering2014，27，3： | 3 |
| 4 | The Arabidopsis catalase triple mutant reveals important roles of catalases and peroxisome-derived signaling in plant development显示文摘Hydrogen peroxide(H_2O_2)is generated in many metabolic processes.As a signaling molecule,H_2O_2plays important roles in plant growth and development,as well as environmental stress response.In Arabidopsis,there are three catalase genes,CAT1,CAT2,and CAT3.The encoded catalases are predominately peroxisomal proteins and are critical for scavenging H_2O_2.Since CAT1 and CAT3 are linked on chromosome 1,it has been almost impossible to generate cat1/3 and cat1/2/3 mutants by traditional genetic tools.In this study,we constructed cat1/3 double mutants and cat1/2/3 triple mutants by CRISPR/Cas9 to investigate the role of catalases.The cat1/2/3 triple mutants displayed severe redox disturbance and growth defects under physiological conditions compared with wild-type and the cat2/3 double mutants.Transcriptome analysis showed a more profound transcriptional response in the cat1/2/3 triple mutants compared to the cat2/3 mutants.These differentially expressed genes are involved in plant growth regulation as well as abiotic and biotic stress responses.In addition,expression of OXI1(OXIDATIVE SIGNAL INDUCIBLE 1)and several MAPK cascade genes were changed dramatically in the catalase triple mutant,suggesting that H_2O_2produced in peroxisomes could serve as a peroxisomal retrograde signal. | Tong Su Pingping Wang Huijuan Li Yiwu Zhao Yao Lu Peng Dai Tianqi Ren Xiaofeng Wang Xuezhi Li Qun Shao Dazhong Zhao Yanxiu Zhao Changle Ma | 2018 | Journal of Integrative Plant Biology2018，60，7： | 3 |
| 5 | Biotreatment of Wastewater from Soda-pretreatment Process of Corn Stover Using White-rot Fungus Z-6显示文摘Alkaline pretreatment of straw materials prior to enzyme hydrolysis is a key step for bioconversion of lignocellulose to bioethanol and chemicals.Wastewater from the alkaline pretreatment process must be treated before discharge to minimize its environmental impact.In this study,biotreatment of the wastewater from soda-pretreatment process of corn stover was investigated using fungus Z-6,and some indexes such as color,chemical oxygen demand(COD),and lignin content of wastewater before and after biotreatment were determined to assess the effect of the biotreatment.Results showed that fungus treatment could remove color up to approximately 72%after 2 d,and decrease COD and lignin content by about 63%and 60%,respectively after 3 d.The wastewater was fractionated using dynamic ultrafiltration method,and the changes in lignin contents of the effluent fractions with different molecular weights before and after biotreatment were analyzed.Some compounds produced by the fungus during treatment were identified using gas chromatography-mass(GC-MS)spectrometer,which revealed that depolymerization of lignin occurred during the biotreatment process. | Xuezhi Li Jian Zhao | 2020 | Paper And Biomaterials2020，5，4： | 2 |
| 6 | Selection of effective singular values using difference spectrum and its application to fault diagnosis of headstock显示文摘 | Zhao Xuezhi Ye Bangyan | 2011 | Mechanical Systems and Signal Processing2011，25，5： | 1 |
| 7 | Convolution wavelet packet transform and its applications to signal processing 显示文摘 | ZHAO Xuezhi YE Bangyan | 2010 | Digital Signal Processing2010，20，5： | 1 |
| 8 | Feature frequencies extraction and fusion of vibration noises of air-conditioner electromotor using adaptive resonance theory显示文摘 | Zhao Xuezhi Ye Banyan | 2010 | Digital Signal Processing2010，，20： | 1 |
| 9 | Similarity of Signal Processing Effect between Hankel Matrix-based SVD and Wavelet Transform and Its Mechanism Analysis显示文摘 | Zhao Xuezhi Ye Bangyan | 2009 | Mech Syst Signal Process2009，23，4： | 1 |
| 10 | Similarity of signal processing effect between Hankel matrix-based SVD and wavelet transform and its mechanism analysis显示文摘 | Xuezhi Zhao Bangyan Ye | 2009 | Mechanical Systems and Signal Processing2009，23，4： | 1 |
| 11 | Inhibitory effects of matrine on electrical signals and amino acid neurotransmitters in hippocampal brain slices显示文摘<正>BACKGROUND:Studies on electrical signals of hippocampal brain slices in vivo have shown that matrine inhibits benzylpenicillin sodium-induced activation of neuronal signal transduction. OBJECTIVE:To verify the inhibition effect of matrine on activation of electrical signals in rat brain slices and the role matrine plays in hippocampal amino acid transmitter release. DESIGN,TIME AND SEFFING:The in vitro,neurophysiological,controlled experiment was performed in the Zhejiang Province Key Laboratory of Cardio-cerebrovascular Disease and Nerve System Drugs Appraisement and Chinese Traditional Medicine Screening and Research between July 2003 and May 2004.The in vivo,neuronal,biochemical experiment was performed in the Zhejiang Province Key Laboratory of Chinese Traditional Medicine Quality Standardization from July 2005 to December 2006. MATERIALS:Forty healthy,Sprague Dawley rats,7-8 weeks old,and 120 healthy,ICR mice,5-6 weeks old,were included in this study,irrespective of gender.Matrine powder was provided by the National Institute for the Control of Pharmaceutical and Biological Products,China.Matrine injection was purchased from Zhuhai Biochemical Pharmaceutical Factory,China.Penicillin was bought from Shijiazhuang Pharmaceutical Group Co.,Ltd.,China. METHODS:(1) Rats were randomly assigned to four groups:control,penicillin model,and matrine high-dose and low-dose,with 10 rats in each group.The control group was perfused with artificial cerebrospinal fluid.In the remaining three groups,hippocampal brain slices were perfused with normal artificial cerebrospinal fluid containing 1×10~6 U/L penicillin for the first 10 minutes.The penicillin model group received artificial cerebrospinal fluid for an additional 30 minutes,while the matrine high-dose and low-dose groups received 0.1 g/L and 0.05 g/L matrine,respectively,for an additional 30 minutes.(2) Mice were randomly assigned to four groups(n=30).The matrine high-, medium-,and low-dose groups were separately injected with 58.5,39.0,and 19.5 mg/kg matrine via caudal vein,respectively.No intervention was administered to the normal group. MAIN OUTCOME MEASURES:The field potential value in the CA1 region of penicillin-induced rat hippocampal brain slices was analyzed using the evoked field potential technique;chromatography was utilized to determine y-aminobutyric acid and glutamic acid content in the mouse hippocampus. RESULTS:(1) Both 0.1 g/L and 0.05 g/L matrine reduced the number of evoked field potentials in the penicillin-induced rat hippocampal brain slices(P<0.05 or P<0.01).In addition,0.1 g/L matrine led to a reduction of evoked field potential amplitude(P<0.05).(2) Compared with normal mice, y-aminobutyric levels were dramatically increased at 20 minutes after high-dose matrine treatment (P<0.05).In addition,significantly increased y-aminobutyric acid levels were observed at 40 minutes after medium-and low-dose matrine treatments(P<0.05 or P<0.01).The glutamic acid/y-aminobutyric acid ratio was significantly less at 20 minutes after high-dose matrine treatment compared with the normal mice group(P<0.05). CONCLUSION:Matrine exerts a central inhibitory effect via increased inhibitory neurotransmitter y-aminobutyric acid levels in the hippocampus. | Xuping Wang Jiping Chen Guizhi Zhao Dan Shou Xuezhi Hong Jianmin Zhang | 2009 | Neural Regeneration Research2009，4，7： | 1 |
| 12 | Identification of vibrating noise signals of electromotor using adaptive wavelet neural network显示文摘 | Zhao Xuezhi Ye Bangyan | 2006 | Lecture Notes in Computer Science2006，，3972： | 1 |
| 13 | Optimization of catalyst pellet structures and operation conditions for CO methanation显示文摘A fundamental understanding of the effects of catalyst pellet structures and operation conditions on catalytic performance is crucial for the reactions limited by diffusion mass transfer. In this work, a numerical investigation has been carried out to understand the effect of catalyst pellet shapes(sphere, cylinder, trilobe and tetralobe) on the reaction-diffusion behaviors of CO methanation. The results reveal that the poly-lobe pellets with larger external specific surface area have shorter diffusion path, and thus result in higher effectiveness factors and CO conversion rates in comparison with the spherical and cylindrical pellets. The effects of operating conditions and pore structures on the trilobular catalyst pellet with high performance are further probed. Though lower temperature can contribute to larger effectiveness factors of pellets, it also brings about lower reaction rates, and pressure has little impact on the effectiveness factors of the pellets. The increase in porosity can reduce the pellet internal diffusion limitations effectively and there exists an optimal porosity for the methanation reaction. Finally, the height of the trilobular pellet is optimized under the given geometric volume, and the results demonstrate that the higher the trilobular catalyst, the better the reaction performance within the allowable mechanical strength range. | Yiquan Zhao Yao Shi Guanghua Ye Jing Zhang Xuezhi Duan Gang Qian Xinggui Zhou | 2021 | Chinese Journal of Chemical Engineering2021，34，12： | 1 |
| 14 | The existence and stability of traveling waves with transition layers for some singular cross-dlffusion systems 显示文摘 | Yaping wu Xuezhi zhao | 2005 | Physica D2005，200，： | 1 |
| 15 | Similarity of signal processing effect between Hankel matrix-based SVD and wavelet transform and its mechanism analysis显示文摘 | ZHAO Xuezhi YE Bangyan | 2009 | Mechanical Systems and Signal Processing2009，23，4： | 1 |
| 16 | Coupling non-isothermal trickle-bed reactor with catalyst pellet models to understand the reaction and diffusion in gas oil hydrodesulfurization显示文摘In this work,a trickle-bed reactor coupled with catalyst pellet model is employed to understand the effects of the temperature and catalyst pellet structures on the reaction-diffusion behaviors in gas oil hydrodesulfurization(HDS).The non-isothermal reactor model is determined to be reasonable due to non-negligible temperature variation caused by the reaction heat.The reaction rate along the reactor is mainly dominated by the temperature,and the sulfur concentration gradient in the catalyst pellet decreases gradually along the reactor,leading to the increased internal effectiveness factor.For the fixed catalyst bed volume,there exists a compromise between the catalyst reaction rate and effectiveness factor.Under commonly studied catalyst pellet size of 0.8-3 mm and porosity of 0.4-0.8,an optimization of the temperature and catalyst pellet structures is carried out,and the optimized outlet sulfur content decreases to 7.6 wppm better than the commercial level at 0.96 mm of the catalyst pellet size and 0.40 of the catalyst porosity. | Xingqiang Zhao Changfeng Yang Mengke Lu Yao Shi Gang Qian Xinggui Zhou Xuezhi Duan | 2020 | Chinese Journal of Chemical Engineering2020，28，4： | 1 |
| 17 | Convolution wavelet pack- et transform and its applica-tions to signal processing 显示文摘 | Zhao Xuezhi Ye Bangyan | 2010 | Digital Signal Processing2010，20，5： | 1 |
| 18 | Two modes of dipole events in tropical Indian Ocean显示文摘By analyzing the distributions of subsurface temperature and the surface wind stress anomalies in the tropical Pacific and Indian Oceans during the Indian Ocean Dipole (IOD) events, two major modes of the IOD and their formation mechanisms are revealed. (1) The subsurface temperature anomaly (STA) in the tropical Indian Ocean during the IOD events can be described as a '<' -shaped and west-east-oriented dipole pattern; in the east side of the '<' pattern, a notable tongue-like STA extends westward along the equator in the tropical eastern Indian Ocean; while in the west side of the '<' pattern, the STA has op- posite sign with two centers (the southern one is stronger than the northern one in intensity) being of rough symmetry about the equator in the tropical mid-western Indian Ocean. (2) The IOD events are composed of two modes, which have similar spatial pattern but different temporal variabilities due to the large scale air-sea interactions within two independent systems. The first mode of the IOD event originates from the air-sea interaction on a scale of the tropical Pacific-Indian Ocean and coexists with ENSO. The second mode originates from the air-sea interaction on a scale of the tropical Indian Ocean and is closely associated with changes in the position and intensity of the Mascarene high pressure. The strong IOD event occurs when the two modes are in phase, and the IOD event weakens or disap- pears when the two modes are out of phase. Besides, the IOD events are normally strong when either of the two modes is strong. (3) The IOD event is caused by the abnormal wind stress forcing over the tropical Indian Ocean, which results in vertical transports, leading to the upwelling and pileup of sea- water. This is the main dynamic processes resulting in the STA. When the anomalous easterly exists over the equatorial Indian Ocean, the cold waters upwell in the tropical eastern Indian Ocean while the warm waters pileup in the tropical western Indian Ocean, hence the thermocline in the tropical Indian Ocean is shallowed in the east and deepened in the west. The off-equator component due to the Corio- lis force in the equatorial area causes the upwelling of cold waters and the shallowing of the equatorial India Ocean thermocline. On the other hand, the anomalous anticyclonic circulations and their curl fields located on both sides of the equator, cause the pileup of warm waters in the central area of their curl fields and the deepening of the equatorial Indian Ocean thermocline off the equator. The above three factors lead to the occurrence of positive phase IOD events. When anomalous westerly domi- nates over the tropical Indian Ocean, the dynamic processes are reversed, and the negative-phase IOD event occurs. | ZHAO YongPing CHEN YongLi WANG Fan BAI XueZhi WU AiMing | 2009 | Science China Earth Sciences2009，52，3： | 1 |
| 19 | Xylanase pretreatment leads to enhanced soda pulping of wheat straw显示文摘 | Jian Zhao Xuezhi Li Yinbo Qu | 2002 | Enzyme and Microbial Technology2002，30，： | 1 |
| 20 | Similarity of signalprocessing effect between Hankel matrix-based SVD andwavelet transform and its mechanism analysis显示文摘 | ZHAO Xuezhi YE Bangyan | 2009 | Mechanical Systems and Signal Processing2009，23，4： | 1 |
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