BACKGROUND Deep learning provides an efficient automatic image recognition method for small bowel(SB)capsule endoscopy(CE)that can assist physicians in diagnosis.However,the existing deep learning models present some ...BACKGROUND Deep learning provides an efficient automatic image recognition method for small bowel(SB)capsule endoscopy(CE)that can assist physicians in diagnosis.However,the existing deep learning models present some unresolved challenges.AIM To propose a novel and effective classification and detection model to automatically identify various SB lesions and their bleeding risks,and label the lesions accurately so as to enhance the diagnostic efficiency of physicians and the ability to identify high-risk bleeding groups.METHODS The proposed model represents a two-stage method that combined image classification with object detection.First,we utilized the improved ResNet-50 classification model to classify endoscopic images into SB lesion images,normal SB mucosa images,and invalid images.Then,the improved YOLO-V5 detection model was utilized to detect the type of lesion and its risk of bleeding,and the location of the lesion was marked.We constructed training and testing sets and compared model-assisted reading with physician reading.RESULTS The accuracy of the model constructed in this study reached 98.96%,which was higher than the accuracy of other systems using only a single module.The sensitivity,specificity,and accuracy of the model-assisted reading detection of all images were 99.17%,99.92%,and 99.86%,which were significantly higher than those of the endoscopists’diagnoses.The image processing time of the model was 48 ms/image,and the image processing time of the physicians was 0.40±0.24 s/image(P<0.001).CONCLUSION The deep learning model of image classification combined with object detection exhibits a satisfactory diagnostic effect on a variety of SB lesions and their bleeding risks in CE images,which enhances the diagnostic efficiency of physicians and improves the ability of physicians to identify high-risk bleeding groups.展开更多
As an important measure of educational reform,post practice can not only improve the practical skills of normal university students in education and teaching,but also relieve the pressure of teachers.Based on this,the...As an important measure of educational reform,post practice can not only improve the practical skills of normal university students in education and teaching,but also relieve the pressure of teachers.Based on this,the Questionnaire for Internship Students and the way of stratified sampling with random sampling were used to conduct a questionnaire survey for Internship Students in Sichuan Normal University in this study;and the problems existing in normal students'post practice were analyzed,then some suggestions were proposed to enhance the practicability and effectiveness of the post practice of normal students in Colleges and universities.展开更多
Educational practice is far from being paid enough attention to in normal colleges and universities in China, and it has become aweak link in normal education. This problem is mainly manifested in the following aspect...Educational practice is far from being paid enough attention to in normal colleges and universities in China, and it has become aweak link in normal education. This problem is mainly manifested in the following aspects: the concept and content of educationalpractice lag behind the educational reform;the time of educational practice is too short;and the practice base is lacking. Therefore,innovative education practice mode is extremely important. In this paper, the problems existing in the educational practice ofnormal universities in China were analyzed, and the main countermeasures for the reform of the educational practice model ofnormal universities were put forward.展开更多
The high-pressure behavior of deep carbonate dictates the state and dynamics of oxidized carbon in the Earth's mantle,playing a vital role in the global carbon cycle and potentially influencing long-term climate c...The high-pressure behavior of deep carbonate dictates the state and dynamics of oxidized carbon in the Earth's mantle,playing a vital role in the global carbon cycle and potentially influencing long-term climate change.Optical absorption and Raman spectroscopic measurements were carried out on two natural carbonate samples in diamond-anvil cells up to 60 GPa.Mg-substitution in high-spin siderite FeCO_(3)increases the crystal field absorption band position by approximately 1000 cm^(-1),but such an effect is marginal at>40 GPa when entering the low-spin state.The crystal field absorption band of dolomite cannot be recognized upon compression to 45.8 GPa at room temperature but,in contrast,the high-pressure polymorph of dolomite exhibits a strong absorption band at frequencies higher than(Mg,Fe)CO_(3)in the lowspin state by 2000–2500 cm^(-1).Additionally,these carbonate minerals show more complicated features for the absorption edge,decreasing with pressure and undergoing a dramatic change through the spin crossover.The optical and vibrational properties of carbonate minerals are highly correlated with iron content and spin transition,indicating that iron is preferentially partitioned into low-spin carbonates.These results shed new light on how carbonate minerals evolve in the mantle,which is crucial to decode the deep carbon cycle.展开更多
Mn-based oxides have been regarded as a promising family of cathode materials for high-performance lithium-ion batteries,but the practical applications have been limited because of severe capacity deterioration(such a...Mn-based oxides have been regarded as a promising family of cathode materials for high-performance lithium-ion batteries,but the practical applications have been limited because of severe capacity deterioration(such as Li Mn O_(2)and Li Mn_(2)O_(4))as well as further complications from successive structure changes during cycling,low initial coulombic efficiency(such as Li-rich cathode)and oxidization of organic carbonate solvents at high charge potential(such as Li Ni0.5 Mn1.5 O4).Large amounts of efforts have been concentrated on resolving these issues towards practical applications,and many vital progresses have been carried out.Hence,the primary target of this review is focused on different proposed strategies and breakthroughs to enhance the rate performance and cycling stability of nanostructured Mn-based oxide cathode materials for Li-ion batteries,including morphology control,ion doping,surface coatings,composite construction.The combination of delicate architectures with conductive species represents the perspective ways to enhance the conductivity of the cathode materials and further buffer the structure transformation and strain during cycling.At last,based on the elaborated progress,several perspectives of Mn-based oxide cathodes are summarized,and some possible attractive strategies and future development directions of Mn-based oxide cathodes with enhanced electrochemical properties are proposed.The review will offer a detailed introduction of various strategies enhancing electrochemical performance and give a novel viewpoint to shed light on the future innovation in Mn-based oxide cathode materials,which benefits the design and construction of high-performance Mn-based oxide cathode materials in the future.展开更多
The transformation of LPSO type in Mg-4Y-2Er-2Zn-0.6Zr during heat treatment and its influence on damping and mechanical properties are reported in this work.Prior to heat treatment,the alloy consisted of a-Mg matrix ...The transformation of LPSO type in Mg-4Y-2Er-2Zn-0.6Zr during heat treatment and its influence on damping and mechanical properties are reported in this work.Prior to heat treatment,the alloy consisted of a-Mg matrix and lamellar 14H LPSO phases.After 510℃heat treatment,lamellae shortened,and their content decreased.Upon 8h heat treatment,block 18R LPSO phases formed at the grain boundaries while 14H LPSO lamellae disappeared.Presence of block 18R LPSO phases improved mechanical and damping properties of the alloy.The corresponding mechanisms of the influence of LPSO type and morphology on mechanical and damping capacities are discussed.展开更多
In this paper,the diamond epitaxial growth mechanism has been studied in detail by employing several types of diamond as a seed in a catalyst-graphite system under high pressure and high temperature (HPHT) conditions....In this paper,the diamond epitaxial growth mechanism has been studied in detail by employing several types of diamond as a seed in a catalyst-graphite system under high pressure and high temperature (HPHT) conditions.We find that the diamond nucleation,growth rate,crystal orientation,and morphology are significantly influenced by the original seeds.The smooth surfaces of seeds are beneficial for the fabrication of high-quality diamond.Our results reveal that the diamond morphology is mainly determined by the original shape of seeds in the early growth stage,but it has an adjustment process during the growth and leads to well symmetry.Additionally,we have also established the growth model for the twinned diamond grown on several seeds,and proposed the possible growth processes by tracking the particular shapes of seeds before and after treatment under HPHT conditions.These results suggest that the shape-controlled synthesis of diamond with well morphology can be realized by employing certain suitable diamond seeds.This work is expected to play an important role in the preparation of trustworthy diamond-based electronic and photonic devices.展开更多
Oxygen plays a pivotal role in the metabolism and activities of mammals.However,oxygen is restricted in some environments-subterranean burrow systems or habitats at high altitude or deep in the ocean-and this could ex...Oxygen plays a pivotal role in the metabolism and activities of mammals.However,oxygen is restricted in some environments-subterranean burrow systems or habitats at high altitude or deep in the ocean-and this could exert hypoxic stresses such as oxidative damage on organisms living in these environments.In order to cope with these stresses,organisms have evolved specific strategies to adapt to hypoxia,including changes in physiology,gene expression regulation,and genetic mutations.Here,we review how mammals have adapted to the three high-altitude plateaus of the world,the limited oxygen dissolved in deep water habitats,and underground tunnels,with the aim of better understanding the adaptation of mammals to hypoxia.展开更多
In this paper,the A-central BMO estimates for higher order commutators of Hardy operators on central Morrey space L^(q,λ)(R^n) are established.In the meanwhile,the corresponding corollary for central BMO estimates is...In this paper,the A-central BMO estimates for higher order commutators of Hardy operators on central Morrey space L^(q,λ)(R^n) are established.In the meanwhile,the corresponding corollary for central BMO estimates is also obtained.展开更多
The stereo matching method based on a space-aware network is proposed, which divides the network into threesections: Basic layer, scale layer, and decision layer. This division is beneficial to integrate residue netwo...The stereo matching method based on a space-aware network is proposed, which divides the network into threesections: Basic layer, scale layer, and decision layer. This division is beneficial to integrate residue network and densenetwork into the space-aware network model. The vertical splitting method for computing matching cost by usingthe space-aware network is proposed for solving the limitation of GPU RAM. Moreover, a hybrid loss is broughtforward to boost the performance of the proposed deep network. In the proposed stereo matching method, thespace-aware network is used to calculate the matching cost and then cross-based cost aggregation and semi-globalmatching are employed to compute a disparity map. Finally, a disparity-post processing method is utilized suchas subpixel interpolation, median filter, and bilateral filter. The experimental results show this method has a goodperformance on running time and accuracy, with a percentage of erroneous pixels of 1.23% on KITTI 2012 and1.94% on KITTI 2015.展开更多
Carbon nanodots(CDs) with visible absorption band and TiO_2 are integrated to enhance the photosensitivity of TiO_2.The CD/TiO_2 nanocomposites show obvious CD-coverage-dependent photocatalytic performance. The CD/TiO...Carbon nanodots(CDs) with visible absorption band and TiO_2 are integrated to enhance the photosensitivity of TiO_2.The CD/TiO_2 nanocomposites show obvious CD-coverage-dependent photocatalytic performance. The CD/TiO_2 nanocomposites with moderate CD coverge exhibit the highest photocatalytic activity after being irradiated with visible light, which is more excellent than that of TiO_2. Too little CD coverage could result in poor visible light absorption, which limits the photocatalytic performance of CD/TiO_2 nanocomposites. While, too much CD coverage weakens the photocatalytic activity of CD/TiO_2 nanocomposites by restraining the extraction of conduction band electrons within TiO_2 to generate active oxygen radicals and the electron transfer(ET) process from CDs to TiO_2. These results indicate that rational regulation of CD coverage and the realization of efficient ET process are important means to optimize the photocatalytic performance of CD/TiO_2 nanocomposites.展开更多
[Objective] The paper was to investigate the effect of hypoxic environment on life rhythm of Apodemus peninsulae. [Method] A. peninsulae were captured and fed in indoor hypoxic environment from May 2015 to October 201...[Objective] The paper was to investigate the effect of hypoxic environment on life rhythm of Apodemus peninsulae. [Method] A. peninsulae were captured and fed in indoor hypoxic environment from May 2015 to October 2016. The respiratory frequency, activity level, food intake and water intake of A. peninsulae were analyzed under different oxygen concentrations. [Result] With the decrease of oxygen concentration, the respiratory frequency of A. peninsulae decreased, and the respiratory depth deepened, while the activity level, food intake and water intake de-creased. [Conclusion] The hypoxic environment had an impact on the respiratory frequency, activity level, food intake and water intake of A. peninsulae.展开更多
In this paper, the authors establish the boundedness of multilinear commutators generated by a Marcinkiewicz integral operator and a RBMO(μ) function on homogeneous Morrey-Herz spaces with non doubling measures.
[Objective]The paper aimed to compare the palatability of 0.005% brodifacoum bait and 0.005% bromodiolone bait for Apodemus agrarius.[Method]A.agrarius were divided into two groups:brodifacoum group and bromodiolone g...[Objective]The paper aimed to compare the palatability of 0.005% brodifacoum bait and 0.005% bromodiolone bait for Apodemus agrarius.[Method]A.agrarius were divided into two groups:brodifacoum group and bromodiolone group,and each group was released with equal amount of poison bait and feed.The daily consumption and mortality of each group was recorded.[Result]The total consumption of poison baits in brodifacoum group and bromodiolone group were64.6 and 40.4 g,respectively.Mortality of A.agrarius was observed in two groups since the 3rdday after administration,and A.agrarius died completely on the5thday.The feeding coefficient of poison bait to feed in brodifacoum group was 1.47,and that in bromodiolone group was 0.69.[Conclusion]The palatability of 0.005% brodifacoum bait for A.agrarius was superior to that of 0.005% bromodiolone bait.展开更多
[Objective]The paper aimed to screen the poison bait and lure suitable for controlling Apodemus peninsulae. [Method]A. peninsulae was reared individually in a single cage,to observe its feeding conditions. [Result] A....[Objective]The paper aimed to screen the poison bait and lure suitable for controlling Apodemus peninsulae. [Method]A. peninsulae was reared individually in a single cage,to observe its feeding conditions. [Result] A. peninsulae preferred carrot and cucumber,followed by peanut,and rat diet was the last choice. [Conclusion] Carrot and cucumber could be used to prepare poisoning bait for controlling A. peninsulae,in order to improve rat capture efficiency.展开更多
[Objective] The paper was to find out the difference in oxygen consumption between Clethrionomys rufocanus and Apodemus agrarius. [Method] The oxygen consumption value of C. rufocanus and A. agrarius was measured usin...[Objective] The paper was to find out the difference in oxygen consumption between Clethrionomys rufocanus and Apodemus agrarius. [Method] The oxygen consumption value of C. rufocanus and A. agrarius was measured using improved closed pressure breathing apparatus,and the oxygen consumption rate was calculated. [Result] The oxygen consumption of C. rufocanus and A. agrarius increased with the increasing body weight,while the increase amplitude of A. agrarius was relatively smaller. The oxygen consumption rate decreased with the increasing body weight. [Conclusion]The result provides a biological basis for breeding and research of experimental rats.展开更多
[Objective] The paper aimed to study effects of continuous light on rhythm of Apodemus agrarius. [Method] The changes in rhythm of A. agrarius activities were observed under natural light and 24 h continuous light con...[Objective] The paper aimed to study effects of continuous light on rhythm of Apodemus agrarius. [Method] The changes in rhythm of A. agrarius activities were observed under natural light and 24 h continuous light condition. [Result]A. agrarius activated at daytime and night,but the activity time at night was longer than that at daytime,and the peak period of activity also occurred at night. When exposed to natural light,the activity time,feeding time and drinking time of A. agrarius were( 27 870 ± 5 252) s,( 6 171 ± 1 529) s and( 474 ± 92) s,respectively; when exposed to 24 continuous light,the activity time,feeding time and drinking time of A. agrarius were( 19 935 ± 2 971) s,( 5 870 ± 1 988) s and( 331 ± 117) s,respectively. [Conclusion]The activity time of A. agrarius changed significantly under two different light conditions,while feeding time and drinking time had little changes.展开更多
The study was conducted to investigate the characteristics of blood physiological parameters of Apodemus agrarius( A. agrarius). Blood physiological parameters of 10 A. agrarius( half male and half female) were determ...The study was conducted to investigate the characteristics of blood physiological parameters of Apodemus agrarius( A. agrarius). Blood physiological parameters of 10 A. agrarius( half male and half female) were determined by automated hematology analyzer. Results showed that difference of A. agrarius hematokrit( HCT) between male and female was significant( P <0. 05),and differences of all the other blood physiological parameters between male and female were not significant( P > 0. 05). In the study,blood physiological reference value of A. agrarius was set up,which provided a basis for the bio-research and prophylaxis and treatment of A. agrarius.展开更多
Effects of extract of medium residue of Pleurotus citrinopileatus on mycelial growth of P. citrinopileatus,G. lucidum and L. edodes were investigated by plate cultivation method. The results showed that extract of med...Effects of extract of medium residue of Pleurotus citrinopileatus on mycelial growth of P. citrinopileatus,G. lucidum and L. edodes were investigated by plate cultivation method. The results showed that extract of medium residue of P. citrinopileatus promoted mycelial growth of L. edodes,and showed the best effects at the addition amount of 75%,while the mycelial growth of G. lucidum and P. citrinopileatus was inhibited by the extract.展开更多
基金The Shanxi Provincial Administration of Traditional Chinese Medicine,No.2023ZYYDA2005.
文摘BACKGROUND Deep learning provides an efficient automatic image recognition method for small bowel(SB)capsule endoscopy(CE)that can assist physicians in diagnosis.However,the existing deep learning models present some unresolved challenges.AIM To propose a novel and effective classification and detection model to automatically identify various SB lesions and their bleeding risks,and label the lesions accurately so as to enhance the diagnostic efficiency of physicians and the ability to identify high-risk bleeding groups.METHODS The proposed model represents a two-stage method that combined image classification with object detection.First,we utilized the improved ResNet-50 classification model to classify endoscopic images into SB lesion images,normal SB mucosa images,and invalid images.Then,the improved YOLO-V5 detection model was utilized to detect the type of lesion and its risk of bleeding,and the location of the lesion was marked.We constructed training and testing sets and compared model-assisted reading with physician reading.RESULTS The accuracy of the model constructed in this study reached 98.96%,which was higher than the accuracy of other systems using only a single module.The sensitivity,specificity,and accuracy of the model-assisted reading detection of all images were 99.17%,99.92%,and 99.86%,which were significantly higher than those of the endoscopists’diagnoses.The image processing time of the model was 48 ms/image,and the image processing time of the physicians was 0.40±0.24 s/image(P<0.001).CONCLUSION The deep learning model of image classification combined with object detection exhibits a satisfactory diagnostic effect on a variety of SB lesions and their bleeding risks in CE images,which enhances the diagnostic efficiency of physicians and improves the ability of physicians to identify high-risk bleeding groups.
文摘As an important measure of educational reform,post practice can not only improve the practical skills of normal university students in education and teaching,but also relieve the pressure of teachers.Based on this,the Questionnaire for Internship Students and the way of stratified sampling with random sampling were used to conduct a questionnaire survey for Internship Students in Sichuan Normal University in this study;and the problems existing in normal students'post practice were analyzed,then some suggestions were proposed to enhance the practicability and effectiveness of the post practice of normal students in Colleges and universities.
文摘Educational practice is far from being paid enough attention to in normal colleges and universities in China, and it has become aweak link in normal education. This problem is mainly manifested in the following aspects: the concept and content of educationalpractice lag behind the educational reform;the time of educational practice is too short;and the practice base is lacking. Therefore,innovative education practice mode is extremely important. In this paper, the problems existing in the educational practice ofnormal universities in China were analyzed, and the main countermeasures for the reform of the educational practice model ofnormal universities were put forward.
基金supported by the National Key Research and Development Program of China(Grant No.2019YFA0708502)。
文摘The high-pressure behavior of deep carbonate dictates the state and dynamics of oxidized carbon in the Earth's mantle,playing a vital role in the global carbon cycle and potentially influencing long-term climate change.Optical absorption and Raman spectroscopic measurements were carried out on two natural carbonate samples in diamond-anvil cells up to 60 GPa.Mg-substitution in high-spin siderite FeCO_(3)increases the crystal field absorption band position by approximately 1000 cm^(-1),but such an effect is marginal at>40 GPa when entering the low-spin state.The crystal field absorption band of dolomite cannot be recognized upon compression to 45.8 GPa at room temperature but,in contrast,the high-pressure polymorph of dolomite exhibits a strong absorption band at frequencies higher than(Mg,Fe)CO_(3)in the lowspin state by 2000–2500 cm^(-1).Additionally,these carbonate minerals show more complicated features for the absorption edge,decreasing with pressure and undergoing a dramatic change through the spin crossover.The optical and vibrational properties of carbonate minerals are highly correlated with iron content and spin transition,indicating that iron is preferentially partitioned into low-spin carbonates.These results shed new light on how carbonate minerals evolve in the mantle,which is crucial to decode the deep carbon cycle.
基金financially supported by the National Natural Science Foundation of China(no.51672120)the Scientific Research Project of Mudanjiang Normal University(no.1355JG014)+1 种基金the Natural Science Foundation of Hebei Province of China(no.B2020501003)the Fundamental Research Funds for the Central Universities(no.N2023030)。
文摘Mn-based oxides have been regarded as a promising family of cathode materials for high-performance lithium-ion batteries,but the practical applications have been limited because of severe capacity deterioration(such as Li Mn O_(2)and Li Mn_(2)O_(4))as well as further complications from successive structure changes during cycling,low initial coulombic efficiency(such as Li-rich cathode)and oxidization of organic carbonate solvents at high charge potential(such as Li Ni0.5 Mn1.5 O4).Large amounts of efforts have been concentrated on resolving these issues towards practical applications,and many vital progresses have been carried out.Hence,the primary target of this review is focused on different proposed strategies and breakthroughs to enhance the rate performance and cycling stability of nanostructured Mn-based oxide cathode materials for Li-ion batteries,including morphology control,ion doping,surface coatings,composite construction.The combination of delicate architectures with conductive species represents the perspective ways to enhance the conductivity of the cathode materials and further buffer the structure transformation and strain during cycling.At last,based on the elaborated progress,several perspectives of Mn-based oxide cathodes are summarized,and some possible attractive strategies and future development directions of Mn-based oxide cathodes with enhanced electrochemical properties are proposed.The review will offer a detailed introduction of various strategies enhancing electrochemical performance and give a novel viewpoint to shed light on the future innovation in Mn-based oxide cathode materials,which benefits the design and construction of high-performance Mn-based oxide cathode materials in the future.
基金This paper was supported by National Natural Science Foundation of China(51671063,51771060,51871068,51971071)Domain Foundation of Equipment Advance Research of 13th Five-year Plan(61409220118)+3 种基金Heilongjiang Province Natural Science Foundation(LH2019E081,E2017030)the Fundamental Research Funds for the Central Universities(HEUCFG201834)Harbin City Application Technology Research and Development Project(2017RAQXJ032)Project of Mudanjiang normal university(GP2020004).
文摘The transformation of LPSO type in Mg-4Y-2Er-2Zn-0.6Zr during heat treatment and its influence on damping and mechanical properties are reported in this work.Prior to heat treatment,the alloy consisted of a-Mg matrix and lamellar 14H LPSO phases.After 510℃heat treatment,lamellae shortened,and their content decreased.Upon 8h heat treatment,block 18R LPSO phases formed at the grain boundaries while 14H LPSO lamellae disappeared.Presence of block 18R LPSO phases improved mechanical and damping properties of the alloy.The corresponding mechanisms of the influence of LPSO type and morphology on mechanical and damping capacities are discussed.
基金Project supported by the National Natural Science Foundation of China (Grant No. 51172089)the Graduate Innovation Fund of Jilin University (Grant No. 20111022)
文摘In this paper,the diamond epitaxial growth mechanism has been studied in detail by employing several types of diamond as a seed in a catalyst-graphite system under high pressure and high temperature (HPHT) conditions.We find that the diamond nucleation,growth rate,crystal orientation,and morphology are significantly influenced by the original seeds.The smooth surfaces of seeds are beneficial for the fabrication of high-quality diamond.Our results reveal that the diamond morphology is mainly determined by the original shape of seeds in the early growth stage,but it has an adjustment process during the growth and leads to well symmetry.Additionally,we have also established the growth model for the twinned diamond grown on several seeds,and proposed the possible growth processes by tracking the particular shapes of seeds before and after treatment under HPHT conditions.These results suggest that the shape-controlled synthesis of diamond with well morphology can be realized by employing certain suitable diamond seeds.This work is expected to play an important role in the preparation of trustworthy diamond-based electronic and photonic devices.
基金Doctoral Research Fund of Mudanjiang Teachers College,Grant/Award Number:No.1002319042The filing project of Heilongjiang Education Department,Grant/Award Number:1354MSYTD024Ancell-Teicher Research Foundation for Genetic and Molecular Evolution.
文摘Oxygen plays a pivotal role in the metabolism and activities of mammals.However,oxygen is restricted in some environments-subterranean burrow systems or habitats at high altitude or deep in the ocean-and this could exert hypoxic stresses such as oxidative damage on organisms living in these environments.In order to cope with these stresses,organisms have evolved specific strategies to adapt to hypoxia,including changes in physiology,gene expression regulation,and genetic mutations.Here,we review how mammals have adapted to the three high-altitude plateaus of the world,the limited oxygen dissolved in deep water habitats,and underground tunnels,with the aim of better understanding the adaptation of mammals to hypoxia.
基金The Pre-research Project(SY201224) of Provincial Key Innovationthe Scientific and Technical Research Project(12531720) of the Education Department of Heilongjiang Province+1 种基金the NSF(A200913) of Heilongjiang Provincethe NSF(11041004,11161042,11071250) of China
文摘In this paper,the A-central BMO estimates for higher order commutators of Hardy operators on central Morrey space L^(q,λ)(R^n) are established.In the meanwhile,the corresponding corollary for central BMO estimates is also obtained.
基金This work was supported in part by the Heilongjiang Provincial Natural Science Foundation of China under Grant F2018002the Research Funds for the Central Universities under Grants 2572016BB11 and 2572016BB12the Foundation of Heilongjiang Education Department under Grant 1354MSYYB003.
文摘The stereo matching method based on a space-aware network is proposed, which divides the network into threesections: Basic layer, scale layer, and decision layer. This division is beneficial to integrate residue network and densenetwork into the space-aware network model. The vertical splitting method for computing matching cost by usingthe space-aware network is proposed for solving the limitation of GPU RAM. Moreover, a hybrid loss is broughtforward to boost the performance of the proposed deep network. In the proposed stereo matching method, thespace-aware network is used to calculate the matching cost and then cross-based cost aggregation and semi-globalmatching are employed to compute a disparity map. Finally, a disparity-post processing method is utilized suchas subpixel interpolation, median filter, and bilateral filter. The experimental results show this method has a goodperformance on running time and accuracy, with a percentage of erroneous pixels of 1.23% on KITTI 2012 and1.94% on KITTI 2015.
基金Project supported by the Scientific Research Starting Fund for Doctor of Mudanjiang Normal University,China(Grant No.MNUB201508)the Youth Science Foundation of Heilongjiang Province,China(Grant No.QC2016007)the National Natural Science Foundation of China(Grant No.61604065)
文摘Carbon nanodots(CDs) with visible absorption band and TiO_2 are integrated to enhance the photosensitivity of TiO_2.The CD/TiO_2 nanocomposites show obvious CD-coverage-dependent photocatalytic performance. The CD/TiO_2 nanocomposites with moderate CD coverge exhibit the highest photocatalytic activity after being irradiated with visible light, which is more excellent than that of TiO_2. Too little CD coverage could result in poor visible light absorption, which limits the photocatalytic performance of CD/TiO_2 nanocomposites. While, too much CD coverage weakens the photocatalytic activity of CD/TiO_2 nanocomposites by restraining the extraction of conduction band electrons within TiO_2 to generate active oxygen radicals and the electron transfer(ET) process from CDs to TiO_2. These results indicate that rational regulation of CD coverage and the realization of efficient ET process are important means to optimize the photocatalytic performance of CD/TiO_2 nanocomposites.
基金Supported by Project of Mudanjiang Science and Technology Bureau:Rodent Pest Investigation in Agriculture and Forestry in Eastern Heilongjiang(2017H45)Ecological and Hazard Control of Forest Rodents(8033006)+1 种基金Investigation on Forest Rodent Resources in Eastern Heilongjiang and Development of Rodenticides(1353PT012)Research Team Project of Zoology
文摘[Objective] The paper was to investigate the effect of hypoxic environment on life rhythm of Apodemus peninsulae. [Method] A. peninsulae were captured and fed in indoor hypoxic environment from May 2015 to October 2016. The respiratory frequency, activity level, food intake and water intake of A. peninsulae were analyzed under different oxygen concentrations. [Result] With the decrease of oxygen concentration, the respiratory frequency of A. peninsulae decreased, and the respiratory depth deepened, while the activity level, food intake and water intake de-creased. [Conclusion] The hypoxic environment had an impact on the respiratory frequency, activity level, food intake and water intake of A. peninsulae.
基金Supported in part by the NSF(A200913)of Heilongjiang Provincethe Scientific Tech-nical Research Project(12531720)of the Education Department of Heilongjiang Province+1 种基金Pre-Research Project(SY201224)of Provincial Key Innovationthe NSF(11161042)of China
文摘In this paper, the authors establish the boundedness of multilinear commutators generated by a Marcinkiewicz integral operator and a RBMO(μ) function on homogeneous Morrey-Herz spaces with non doubling measures.
基金Supported by Science and Technology Innovation Team Projects of Colleges and Universities in Heilongjiang Province&Collapse Mechanism and Control Technology Research of Forest Rodent Population&Rodent Fauna in Mudanjiang Sandaoguan Forest Farm and Their Harms on Agriculture and Forestry(yjsxscx2015-12mdjnu)
文摘[Objective]The paper aimed to compare the palatability of 0.005% brodifacoum bait and 0.005% bromodiolone bait for Apodemus agrarius.[Method]A.agrarius were divided into two groups:brodifacoum group and bromodiolone group,and each group was released with equal amount of poison bait and feed.The daily consumption and mortality of each group was recorded.[Result]The total consumption of poison baits in brodifacoum group and bromodiolone group were64.6 and 40.4 g,respectively.Mortality of A.agrarius was observed in two groups since the 3rdday after administration,and A.agrarius died completely on the5thday.The feeding coefficient of poison bait to feed in brodifacoum group was 1.47,and that in bromodiolone group was 0.69.[Conclusion]The palatability of 0.005% brodifacoum bait for A.agrarius was superior to that of 0.005% bromodiolone bait.
基金Supported by Science and Technology Innovation Team Projects of Colleges and Universities in Heilongjiang Province(Collapse Mechanism and Control Technology Research of Forest Rodent Population)Rodent Fauna in Mudanjiang Sandaoguan Forest Farm and Their Harms on Agriculture and Forestry(yjsxscx2015-12mdjnu)
文摘[Objective]The paper aimed to screen the poison bait and lure suitable for controlling Apodemus peninsulae. [Method]A. peninsulae was reared individually in a single cage,to observe its feeding conditions. [Result] A. peninsulae preferred carrot and cucumber,followed by peanut,and rat diet was the last choice. [Conclusion] Carrot and cucumber could be used to prepare poisoning bait for controlling A. peninsulae,in order to improve rat capture efficiency.
基金Supported by Science and Technology Innovation Team Projects of Colleges and Universities in Heilongjiang Province(Collapse Mechanism and Control Technology Research of Forest Rodent Population)Rodent Fauna in Mudanjiang Sandaoguan Forest Farm and Their Harms on Agriculture and Forestry(yjsxscx2015-12mdjnu)
文摘[Objective] The paper was to find out the difference in oxygen consumption between Clethrionomys rufocanus and Apodemus agrarius. [Method] The oxygen consumption value of C. rufocanus and A. agrarius was measured using improved closed pressure breathing apparatus,and the oxygen consumption rate was calculated. [Result] The oxygen consumption of C. rufocanus and A. agrarius increased with the increasing body weight,while the increase amplitude of A. agrarius was relatively smaller. The oxygen consumption rate decreased with the increasing body weight. [Conclusion]The result provides a biological basis for breeding and research of experimental rats.
基金Supported by Rodent Fauna in Mudanjiang Sandaoguan Forest Farm and Their Harms on Agriculture and Forestry(yjsxscx2015-12mdjnu)Changes in Community Structure of Forest Rodents after Human Disturbance in Zhangguangcai Mountain(1351MSYYB003)
文摘[Objective] The paper aimed to study effects of continuous light on rhythm of Apodemus agrarius. [Method] The changes in rhythm of A. agrarius activities were observed under natural light and 24 h continuous light condition. [Result]A. agrarius activated at daytime and night,but the activity time at night was longer than that at daytime,and the peak period of activity also occurred at night. When exposed to natural light,the activity time,feeding time and drinking time of A. agrarius were( 27 870 ± 5 252) s,( 6 171 ± 1 529) s and( 474 ± 92) s,respectively; when exposed to 24 continuous light,the activity time,feeding time and drinking time of A. agrarius were( 19 935 ± 2 971) s,( 5 870 ± 1 988) s and( 331 ± 117) s,respectively. [Conclusion]The activity time of A. agrarius changed significantly under two different light conditions,while feeding time and drinking time had little changes.
基金Supported by Science and Technology Innovation Team Project of Universities in Heilongjiang Province&Graduate Academic Innovation Project of Mudanjiang Normal University
文摘The study was conducted to investigate the characteristics of blood physiological parameters of Apodemus agrarius( A. agrarius). Blood physiological parameters of 10 A. agrarius( half male and half female) were determined by automated hematology analyzer. Results showed that difference of A. agrarius hematokrit( HCT) between male and female was significant( P <0. 05),and differences of all the other blood physiological parameters between male and female were not significant( P > 0. 05). In the study,blood physiological reference value of A. agrarius was set up,which provided a basis for the bio-research and prophylaxis and treatment of A. agrarius.
基金Supported by Project of Mudanjiang Normal University for Serving the Local(FD2014003)Science and Technology Research Project of Department of Education,Helongjiang Province(12531721)College Students' Innovation and Enterpreneurship Training Program of Helongjiang Province(201610233029)
文摘Effects of extract of medium residue of Pleurotus citrinopileatus on mycelial growth of P. citrinopileatus,G. lucidum and L. edodes were investigated by plate cultivation method. The results showed that extract of medium residue of P. citrinopileatus promoted mycelial growth of L. edodes,and showed the best effects at the addition amount of 75%,while the mycelial growth of G. lucidum and P. citrinopileatus was inhibited by the extract.
