Regional cultural patterns and characteristics play a positive role in economic and social development.By planning and constructing cultural amenities and creating cultural scenes,the spatial quality and quality of li...Regional cultural patterns and characteristics play a positive role in economic and social development.By planning and constructing cultural amenities and creating cultural scenes,the spatial quality and quality of life in a region can be enhanced,facilitating the expansion of cultural consumption.Shaanxi,with its rich historical and cultural resources,positions the capital city of Xi’an as a“world historical city”,boasting a vast number of cultural amenities represented by“cultural facilities”,“cultural activities”,“cultural experiences”,and“cultural services”.The development of urban cultural scene,with the aim of promoting the upgrading of regional cultural consumption in Shaanxi,requires comprehensive planning and a multifaceted approach,particularly in integrating provincial cultural scenes,clarifying the positioning of cultural scenes,innovating cultural scene experience projects,creating cultural scene intellectual property(IP),and empowering cultural scenes through the application of science and technology.展开更多
Physical training and functional reserve in winter physical education teaching can optimize the energy consumption of the body,regulate cardiopulmonary function,and stabilize emotions.It is essential to clarify the st...Physical training and functional reserve in winter physical education teaching can optimize the energy consumption of the body,regulate cardiopulmonary function,and stabilize emotions.It is essential to clarify the strategies of winter physical training and functional reserve as well as the existing issues in college physical education teaching,which subsequently improves students’physical functions and achieves comprehensive development goals.展开更多
A new 3D cobalt metal-organic framework [C_7H_(13)N_2]_2[(CH_3COO)_2Co_7(oba)_5-(Hoba)_2(OH)_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD, and TG. ...A new 3D cobalt metal-organic framework [C_7H_(13)N_2]_2[(CH_3COO)_2Co_7(oba)_5-(Hoba)_2(OH)_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD, and TG. This complex crystallizes in monoclinic system, space group P21/c with a = 19.4499(4), b = 10.8839(2), c = 27.7796(5) ?, β = 104.467(2)o, V = 5694.22(19) ?~3, Z = 2, C_(116)H_(92)Co_7N_4O_(42), M_r = 2626.45, D_c = 1.532 g/cm^3 , F(000) = 2682, μ = 1.085 mm-1, R = 0.0387 and wR = 0.1177. Its structure is characterized as a 3D open framework constructed by seven nuclear clusters [(CH_3COO)_Co_7(OH)_2] and the 4,4?-oxybisbenzoic acid ligand. The used ILs cations are located in the middle of the pore and compensate for the negative charges of framework. Furthermore, its fluorescence property has also been studied.展开更多
Deep integration of agricultural recreation and health and wellness industry is an inevitable choice for the development of China's agricultural recreation and the transformation and upgrading of the agricultural ...Deep integration of agricultural recreation and health and wellness industry is an inevitable choice for the development of China's agricultural recreation and the transformation and upgrading of the agricultural industry.The development of agricultural recreation and health and wellness industry is inseparable from the four dimensions:production,living,ecology,and life.Therefore,the integration of agricultural recreation and health and wellness industry should also be promoted from the four aspects:production content,living content,ecological content,and life content.At the current stage in China,insufficient integration of the two is mainly manifested as lagging infrastructure,insufficient effective supply,shallow cultural connotations,lack of professional talents,and incomplete industry chain.The path to promote the deep integration of China's agricultural recreation and health and wellness industry includes improving the recreation,health and wellness infrastructure and supporting facilities,developing specialty products and experience projects for recreation,health and wellness,building a brand of recreation,health and wellness culture,cultivating and introducing professional management and service talents,and planning systematic layout of the recreation,health and wellness industry.展开更多
Based on the orthogonalities of the vector wave functions, the expressions of scattering fields are developed as the particle in the zero order field and in the first order fields of x, y, and z, respectively. A gener...Based on the orthogonalities of the vector wave functions, the expressions of scattering fields are developed as the particle in the zero order field and in the first order fields of x, y, and z, respectively. A general relation between the expansion coefficients of scattering field and incident field is presented. Taking the elliptical beam for example, the scattering property of a particle in beam is investigated. After analyzing the effects of the beam waist, irradiating distance, etc. on scattering property, the validity of the proposed algorithm is demonstrated. Results show that the beam waist may improve the particle identification property and the particle has a strong scattering both in the forward direction and in the backward direction.The method proposed is simple and is a new way of researching the scattering from particles in electromagnetic beams.展开更多
To further study the floral organogenesis and discussing the floral origin of Phytolacca, the procedures of floral organogenesis were observed in Phytolacca esculenta and Phytolacca zhejiangensis. The results showed t...To further study the floral organogenesis and discussing the floral origin of Phytolacca, the procedures of floral organogenesis were observed in Phytolacca esculenta and Phytolacca zhejiangensis. The results showed that the floral organogenesis was consistent in Phytolacca. Their sepals were 2/5 helix, and with counter-clockwise and clockwise, usually the first sepal located at non-median of abaxial side. The first sepal of Phytolacca esculenta was initiated at non-median of adaxial side. There was no evident relationship between sepal and stamen initiating position, and the stamens initiated on ring meristem, they initiated approximately at the same time, and when the androecium member was numerous, they initiated centrifugally, the outer stamen initiated irregularly. Carpel initiated alternately with inner stamens. And the carpels connected by septum, if the septum grew more, the carpel was syncarpous at morphology, otherwise the carpel was apocarpous at morphology. So the syncarpous and the apocarpous have no successively relationship on evolution. Ovule initiated inside the carpel and opposite to carpel. Androecium, carpel and ovule initiated at ring meristem.展开更多
Influenced by social contexts and multilingualism,Singlish has developed into its own linguistic features,especially in its pronunciation,lexicon,and syntax.This paper gives an overall analysis of linguistic feature o...Influenced by social contexts and multilingualism,Singlish has developed into its own linguistic features,especially in its pronunciation,lexicon,and syntax.This paper gives an overall analysis of linguistic feature of Singlish followed by examples,presenting how Singlish is different from Standard English.展开更多
This article analyzes errors with regard to the types and causes of errors commonly committed by Chinese EFL(English as a foreign language)learners.It covers the concepts and theories concerning error analysis,synthes...This article analyzes errors with regard to the types and causes of errors commonly committed by Chinese EFL(English as a foreign language)learners.It covers the concepts and theories concerning error analysis,synthesizes previous research,as well as identifies the flaws and gaps found in those literatures.This article provides several teaching suggestions based on previous analyses,which have found that the misuse of verbs and articles are the most common errors in English writing among Chinese students.Based on this,most studies attributed those errors to the negative transfer of Chinese due to the thought patterns and disparities between Chinese and English.展开更多
In this work,through a facile method of low-temperature(only 350℃)self-reduction,1D nano-sized M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)blue phosphors with highly efficient performance can be obtained.The crystal structure,...In this work,through a facile method of low-temperature(only 350℃)self-reduction,1D nano-sized M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)blue phosphors with highly efficient performance can be obtained.The crystal structure,morphology and photoluminescence(PL)properties including thermal stability of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors were investigated.The M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors show broad band excitation spectra and narrow band emission spectra.The photoluminescence quantum yields(PLQY)of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)are as high as 98%and 87.2%,respectively.Furthermore,the color purities of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)can reach 99.1%and 93.2%,respectively,When heated up to 150℃,the emission intensities of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors can still keep 72.7%and80.0%,respectively.Finally,the above-mentioned phosphors exhibit outstanding performance when manufacturing WLEDs.展开更多
In this paper,we reported a facile additive-free route for synthesizing calcium carbonate(CaCO3)with different morphologies and polymorphs by a precipitation reaction method between Ca(CH3COO)2 and NaHCO3 in water and...In this paper,we reported a facile additive-free route for synthesizing calcium carbonate(CaCO3)with different morphologies and polymorphs by a precipitation reaction method between Ca(CH3COO)2 and NaHCO3 in water and ethylene glycol(H2O/EG)mixed solvent.It has been found that the concentration of Ca^2+ and HCO3^-,the volume ratio of H2O/EG and the reaction temperature are turned out to be important parameters for the morphology and polymorph of CaCO3.Various interesting morphologies,such as the spherical,elliptoid,spindle-like,petal-like,cricoid,cubic,plate-like and rod-like can be easily obtained.Pure polymorphs of vaterite,calcite and aragonite can also be tuned by adjusting experimental conditions.The studies might be helpful to provide new insights into the morphosynthesis and crystalline phase control of other inorganic materials.O 611.4;O 643.1.展开更多
Mesoporous hollow silica nanospheres(MHSNS)with an average diameter of 100 nm and wall thickness of approximately 10 nm were synthesized via core-shell structure of CaCO3@SiO2 by a one-pot route.Hollow silica nanosphe...Mesoporous hollow silica nanospheres(MHSNS)with an average diameter of 100 nm and wall thickness of approximately 10 nm were synthesized via core-shell structure of CaCO3@SiO2 by a one-pot route.Hollow silica nanospheres with mesoporous shell were obtained by dissolving CaCO3 in HCl dilute solution.The characterization of as-prepared hollow products by BET indicates that MHSNS have a specific surface area of 865 m^2/g and a narrow pore size of 3.78 nm.展开更多
Series of activated carbon(AC)modified MgFe-layered double hydroxides(LDH/ACs)were synthesized using ultrasonic-assisted co-precipitation method.Herein the mass ratio of Mg/Fe-LDH and AC was varied at 1.55,2.34,and 2....Series of activated carbon(AC)modified MgFe-layered double hydroxides(LDH/ACs)were synthesized using ultrasonic-assisted co-precipitation method.Herein the mass ratio of Mg/Fe-LDH and AC was varied at 1.55,2.34,and 2.86,respectively.The calcinations of corresponding LDH/ACs were obtained at 723 K for 5 h and named as LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86,respectively.These products were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),Brunauer-Emmett-Teller(BET)measurements and scanning electron microscopy(SEM).LDO-ACs were applied for the removal of methyl orange(MO).The result showed that aggregation degree of MgFe-LDH decreased in the existence of AC.The pore sizes of LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86 markedly increased with the sharp decreasing of surface area.The values of the statured adsorption capacity of LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86 were obviously higher than those of MgFe-layered double hydroxides fabricated by traditional method(LDO0).The mechanism for the enhanced adsorption may be that the loose macrospore structure of LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86 abbreviates the diffusion resistance and bore repulsive force of MO molecular coupled with its space confinement effect in contrast with LDO0,which is favor for the free self-assembly of MO to form intercalation compound.MO-loaded LDO-AC-2.34 was regenerated by calcination and reused several times,still retaining its original adsorption capacity.展开更多
A novel heterometallic complex constructed by imidazole ligand,CoZn(C3N2H3)4(1),has been synthesized under hydrothermal conditions.Compound 1 was characterized by IR spectra,thermal analysis,powder X-ray diffraction a...A novel heterometallic complex constructed by imidazole ligand,CoZn(C3N2H3)4(1),has been synthesized under hydrothermal conditions.Compound 1 was characterized by IR spectra,thermal analysis,powder X-ray diffraction and single-crystal X-ray diffraction.Single-crystal X-ray diffraction studies reveals that compound 1 is in the tetragonal system,space group I41cd with a=23.4371(5),b=23.4371(5),c=12.4430(7)?,V=6834.9(4)?3,Z=16,C12H12CoN8Zn,Mr=392.60,Dc=1.526 g/cm^3,F(000)=3152,μ=2.381 mm–1,R=0.0323 and w R=0.0789.The CoZn(C3N2H3)4 is one-dimensional heterometallic molecular chains,which are further extended into a 3D open framework.Moreover,the solid-state fluorescence property of the complex has also been investigated at room temperature.展开更多
This study employs the bibliometric method to analyse a sample of 936 core journal articles obtained from Chinese Social Sciences Citation Index(CSSCI)during the period 1998–2014,with a view to outlining the situatio...This study employs the bibliometric method to analyse a sample of 936 core journal articles obtained from Chinese Social Sciences Citation Index(CSSCI)during the period 1998–2014,with a view to outlining the situation,characteristics and trends of Chinese research on disaster economics.Our analysis shows that Chinese research on disaster economics is characterised by marked shortterm fluctuations,non-mainstream tendency,localisation and noncollaboration.In terms of content,the major concerns of Chinese scholars are post-disaster construction,agricultural natural disasters,as well as disaster insurance and securitisation.In terms of methodology,these researches have entered into a quantitative phase of establishing the evaluation index system,and mathematical model analysis.With regard to the path,researches in the Chinese language have expanded from analyses of causes and natures of disasters to those of institutional response to disasters(e.g.disaster insurance and finance).展开更多
基金the Major Theoretical and Practical Issues Research Project in Social Sciences of Shaanxi Province(2021ND0076).
文摘Regional cultural patterns and characteristics play a positive role in economic and social development.By planning and constructing cultural amenities and creating cultural scenes,the spatial quality and quality of life in a region can be enhanced,facilitating the expansion of cultural consumption.Shaanxi,with its rich historical and cultural resources,positions the capital city of Xi’an as a“world historical city”,boasting a vast number of cultural amenities represented by“cultural facilities”,“cultural activities”,“cultural experiences”,and“cultural services”.The development of urban cultural scene,with the aim of promoting the upgrading of regional cultural consumption in Shaanxi,requires comprehensive planning and a multifaceted approach,particularly in integrating provincial cultural scenes,clarifying the positioning of cultural scenes,innovating cultural scene experience projects,creating cultural scene intellectual property(IP),and empowering cultural scenes through the application of science and technology.
文摘Physical training and functional reserve in winter physical education teaching can optimize the energy consumption of the body,regulate cardiopulmonary function,and stabilize emotions.It is essential to clarify the strategies of winter physical training and functional reserve as well as the existing issues in college physical education teaching,which subsequently improves students’physical functions and achieves comprehensive development goals.
基金Project supported by College Programs SNIE(No.2014ZDKJ011)
文摘A new 3D cobalt metal-organic framework [C_7H_(13)N_2]_2[(CH_3COO)_2Co_7(oba)_5-(Hoba)_2(OH)_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD, and TG. This complex crystallizes in monoclinic system, space group P21/c with a = 19.4499(4), b = 10.8839(2), c = 27.7796(5) ?, β = 104.467(2)o, V = 5694.22(19) ?~3, Z = 2, C_(116)H_(92)Co_7N_4O_(42), M_r = 2626.45, D_c = 1.532 g/cm^3 , F(000) = 2682, μ = 1.085 mm-1, R = 0.0387 and wR = 0.1177. Its structure is characterized as a 3D open framework constructed by seven nuclear clusters [(CH_3COO)_Co_7(OH)_2] and the 4,4?-oxybisbenzoic acid ligand. The used ILs cations are located in the middle of the pore and compensate for the negative charges of framework. Furthermore, its fluorescence property has also been studied.
基金2019 Major Theoretical and Practical Issues Research Project of Shaanxi Provincial Social Science Circle"Upgrading the Supply of Cultural Products to Meet People's Needs for a Better Life"(2019Z038)。
文摘Deep integration of agricultural recreation and health and wellness industry is an inevitable choice for the development of China's agricultural recreation and the transformation and upgrading of the agricultural industry.The development of agricultural recreation and health and wellness industry is inseparable from the four dimensions:production,living,ecology,and life.Therefore,the integration of agricultural recreation and health and wellness industry should also be promoted from the four aspects:production content,living content,ecological content,and life content.At the current stage in China,insufficient integration of the two is mainly manifested as lagging infrastructure,insufficient effective supply,shallow cultural connotations,lack of professional talents,and incomplete industry chain.The path to promote the deep integration of China's agricultural recreation and health and wellness industry includes improving the recreation,health and wellness infrastructure and supporting facilities,developing specialty products and experience projects for recreation,health and wellness,building a brand of recreation,health and wellness culture,cultivating and introducing professional management and service talents,and planning systematic layout of the recreation,health and wellness industry.
基金supported by the National Natural Science Foundation of China(Grant Nos.60971079,61271110,and 61102018)
文摘Based on the orthogonalities of the vector wave functions, the expressions of scattering fields are developed as the particle in the zero order field and in the first order fields of x, y, and z, respectively. A general relation between the expansion coefficients of scattering field and incident field is presented. Taking the elliptical beam for example, the scattering property of a particle in beam is investigated. After analyzing the effects of the beam waist, irradiating distance, etc. on scattering property, the validity of the proposed algorithm is demonstrated. Results show that the beam waist may improve the particle identification property and the particle has a strong scattering both in the forward direction and in the backward direction.The method proposed is simple and is a new way of researching the scattering from particles in electromagnetic beams.
文摘To further study the floral organogenesis and discussing the floral origin of Phytolacca, the procedures of floral organogenesis were observed in Phytolacca esculenta and Phytolacca zhejiangensis. The results showed that the floral organogenesis was consistent in Phytolacca. Their sepals were 2/5 helix, and with counter-clockwise and clockwise, usually the first sepal located at non-median of abaxial side. The first sepal of Phytolacca esculenta was initiated at non-median of adaxial side. There was no evident relationship between sepal and stamen initiating position, and the stamens initiated on ring meristem, they initiated approximately at the same time, and when the androecium member was numerous, they initiated centrifugally, the outer stamen initiated irregularly. Carpel initiated alternately with inner stamens. And the carpels connected by septum, if the septum grew more, the carpel was syncarpous at morphology, otherwise the carpel was apocarpous at morphology. So the syncarpous and the apocarpous have no successively relationship on evolution. Ovule initiated inside the carpel and opposite to carpel. Androecium, carpel and ovule initiated at ring meristem.
文摘Influenced by social contexts and multilingualism,Singlish has developed into its own linguistic features,especially in its pronunciation,lexicon,and syntax.This paper gives an overall analysis of linguistic feature of Singlish followed by examples,presenting how Singlish is different from Standard English.
文摘This article analyzes errors with regard to the types and causes of errors commonly committed by Chinese EFL(English as a foreign language)learners.It covers the concepts and theories concerning error analysis,synthesizes previous research,as well as identifies the flaws and gaps found in those literatures.This article provides several teaching suggestions based on previous analyses,which have found that the misuse of verbs and articles are the most common errors in English writing among Chinese students.Based on this,most studies attributed those errors to the negative transfer of Chinese due to the thought patterns and disparities between Chinese and English.
基金Project supported by the National Natural Science Foundation of China(22003035,22073061)the Natural Science Foundation of Shaanxi Province Department of Education(21JK0587)+2 种基金the Natural Science Foundation of Shaanxi Province(2020GY-237)the Foundation of Shaanxi Xueqian Normal University(2020YBKJ70)Innovation and Entrepreneurship Training Program for College Students in Shaanxi Province(S202014390037)。
文摘In this work,through a facile method of low-temperature(only 350℃)self-reduction,1D nano-sized M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)blue phosphors with highly efficient performance can be obtained.The crystal structure,morphology and photoluminescence(PL)properties including thermal stability of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors were investigated.The M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors show broad band excitation spectra and narrow band emission spectra.The photoluminescence quantum yields(PLQY)of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)are as high as 98%and 87.2%,respectively.Furthermore,the color purities of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)can reach 99.1%and 93.2%,respectively,When heated up to 150℃,the emission intensities of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors can still keep 72.7%and80.0%,respectively.Finally,the above-mentioned phosphors exhibit outstanding performance when manufacturing WLEDs.
基金the National Natural Science Foundation of China(50573030)the Scientific Research Program Funded by Shaanxi Provincial Education Department(20JK0584)。
文摘In this paper,we reported a facile additive-free route for synthesizing calcium carbonate(CaCO3)with different morphologies and polymorphs by a precipitation reaction method between Ca(CH3COO)2 and NaHCO3 in water and ethylene glycol(H2O/EG)mixed solvent.It has been found that the concentration of Ca^2+ and HCO3^-,the volume ratio of H2O/EG and the reaction temperature are turned out to be important parameters for the morphology and polymorph of CaCO3.Various interesting morphologies,such as the spherical,elliptoid,spindle-like,petal-like,cricoid,cubic,plate-like and rod-like can be easily obtained.Pure polymorphs of vaterite,calcite and aragonite can also be tuned by adjusting experimental conditions.The studies might be helpful to provide new insights into the morphosynthesis and crystalline phase control of other inorganic materials.O 611.4;O 643.1.
基金Supported by the National Natural Science Foundation of China(50573030)the Scientific Research Program Funded by Shaanxi Provincial Education Department(20JK0584)。
文摘Mesoporous hollow silica nanospheres(MHSNS)with an average diameter of 100 nm and wall thickness of approximately 10 nm were synthesized via core-shell structure of CaCO3@SiO2 by a one-pot route.Hollow silica nanospheres with mesoporous shell were obtained by dissolving CaCO3 in HCl dilute solution.The characterization of as-prepared hollow products by BET indicates that MHSNS have a specific surface area of 865 m^2/g and a narrow pore size of 3.78 nm.
基金Supported by the National Natural Science Foundation of China(31201305)the Natural Science Foundation of Shaanxi Province(2016JM2018)
文摘Series of activated carbon(AC)modified MgFe-layered double hydroxides(LDH/ACs)were synthesized using ultrasonic-assisted co-precipitation method.Herein the mass ratio of Mg/Fe-LDH and AC was varied at 1.55,2.34,and 2.86,respectively.The calcinations of corresponding LDH/ACs were obtained at 723 K for 5 h and named as LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86,respectively.These products were characterized by Fourier transform infrared spectroscopy(FT-IR),X-ray diffraction(XRD),Brunauer-Emmett-Teller(BET)measurements and scanning electron microscopy(SEM).LDO-ACs were applied for the removal of methyl orange(MO).The result showed that aggregation degree of MgFe-LDH decreased in the existence of AC.The pore sizes of LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86 markedly increased with the sharp decreasing of surface area.The values of the statured adsorption capacity of LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86 were obviously higher than those of MgFe-layered double hydroxides fabricated by traditional method(LDO0).The mechanism for the enhanced adsorption may be that the loose macrospore structure of LDO-AC-1.55,LDO-AC-2.34 and LDO-AC-2.86 abbreviates the diffusion resistance and bore repulsive force of MO molecular coupled with its space confinement effect in contrast with LDO0,which is favor for the free self-assembly of MO to form intercalation compound.MO-loaded LDO-AC-2.34 was regenerated by calcination and reused several times,still retaining its original adsorption capacity.
基金supported by the Scientific Research Project of Education Department of Shaanxi Province(No.18JK0190)。
文摘A novel heterometallic complex constructed by imidazole ligand,CoZn(C3N2H3)4(1),has been synthesized under hydrothermal conditions.Compound 1 was characterized by IR spectra,thermal analysis,powder X-ray diffraction and single-crystal X-ray diffraction.Single-crystal X-ray diffraction studies reveals that compound 1 is in the tetragonal system,space group I41cd with a=23.4371(5),b=23.4371(5),c=12.4430(7)?,V=6834.9(4)?3,Z=16,C12H12CoN8Zn,Mr=392.60,Dc=1.526 g/cm^3,F(000)=3152,μ=2.381 mm–1,R=0.0323 and w R=0.0789.The CoZn(C3N2H3)4 is one-dimensional heterometallic molecular chains,which are further extended into a 3D open framework.Moreover,the solid-state fluorescence property of the complex has also been investigated at room temperature.
文摘This study employs the bibliometric method to analyse a sample of 936 core journal articles obtained from Chinese Social Sciences Citation Index(CSSCI)during the period 1998–2014,with a view to outlining the situation,characteristics and trends of Chinese research on disaster economics.Our analysis shows that Chinese research on disaster economics is characterised by marked shortterm fluctuations,non-mainstream tendency,localisation and noncollaboration.In terms of content,the major concerns of Chinese scholars are post-disaster construction,agricultural natural disasters,as well as disaster insurance and securitisation.In terms of methodology,these researches have entered into a quantitative phase of establishing the evaluation index system,and mathematical model analysis.With regard to the path,researches in the Chinese language have expanded from analyses of causes and natures of disasters to those of institutional response to disasters(e.g.disaster insurance and finance).
