近义词“稍微”和“有点(儿)”的连用用法已进入两词的词典释义,过往研究较多关注于连用本身,探索“为何要连用”,即连用功能,至于程度副词与后续成分的双向选择性,即“为何能连用”——连用机制的研究有待深入,机制分析能够影响“信息...近义词“稍微”和“有点(儿)”的连用用法已进入两词的词典释义,过往研究较多关注于连用本身,探索“为何要连用”,即连用功能,至于程度副词与后续成分的双向选择性,即“为何能连用”——连用机制的研究有待深入,机制分析能够影响“信息处理”和“二语教学”等应用领域,有较大价值。本文关注程度副词对后续成分句法语义方面的选择限制。句法上,程度副词“有点(儿)”和“稍微有点(儿)”能修饰一些具有性状义的名词(组),“稍微”基本不修饰名词(组),揭示出“有点(儿)”的句法特征对“稍微有点(儿)”连用形式的约束更强。语义上,观察“稍微”对后续成分量度方面的选择限制,“稍微”的后续成分倾向于两端边界确定的成分,“有点(儿) x”表示线段型成分,这是“有点(儿) x”能够受“稍微”修饰并形成常用连用的重要原因。The consecutive usage of the synonyms “slightly” and “a bit (of)” has been incorporated into the dictionary definitions of both words. Previous research has primarily focused on the phenomenon of consecutive usage itself, exploring “why they are used consecutively,” i.e., their combined functions. However, the bidirectional selectivity between degree adverbs and their subsequent components, which explains “why they can be used consecutively”—the study of consecutive mechanisms—remains to be delved into more deeply. Mechanism analysis holds significant value as it can impact applied fields such as “information processing” and “second language teaching”. This article focuses on the syntactic and semantic selection limitations of degree adverbs on subsequent components. Syntactically, the degree adverbs “youdian(er)” and “shaoweiyoudian(er)” can modify some nouns (groups) with characteristic meanings, while “shaowei” basically does not modify nouns (groups), revealing that the syntactic feature of “youdian(er)” imposes stronger constraints on the combination form of “shaoweiyoudian(er)”. Semantically, the subsequent components of “shaowei” tend to be components with fixed boundaries at both ends, while “youdian (er) x” represents a line segment type component. This is an important reason why “youdian (er) x” can be modified by “shaowei” and form commonly used combinations.展开更多
Copper-nickel alloys can suffer severe localized corrosion in marine environments containing sulfate-reducing bacteria(SRB),but the effect of SRB on the under-deposit corrosion of copper-nickel alloys is unknown.In th...Copper-nickel alloys can suffer severe localized corrosion in marine environments containing sulfate-reducing bacteria(SRB),but the effect of SRB on the under-deposit corrosion of copper-nickel alloys is unknown.In this work,the corrosion behavior of B10 copper-nickel alloy beneath a deposit caused by SRB with carbon source starvation in artificial seawater was studied based on electrochemical measurements and surface analysis.Results demonstrate that SRB with an organic carbon starvation can survive in artificial water but most SRB cells have died.The survived SRB cells can attach to the bare and deposit-covered B10 copper-nickel alloy,leading to the corrosion acceleration.Due to the limitation of organic carbon source,the pitting corrosion of B10 copper-nickel alloy caused by SRB is not serious.However,serious pitting corrosion of the deposit-covered B10 copper-nickel alloy can be found both in abiotic and biotic conditions,and the pitting corrosion and uniform corrosion are further accelerated by SRB.There is a galvanic effect between the bare and deposit-covered specimens in the presence of SRB in the early stage but the galvanic effect after 5 d of testing can be neglected due to the low OCP difference values.展开更多
Hydrogen peroxide(H_(2)O_(2))has gained widespread attention as a versatile oxidant and a mild disin-fectant.Here,an electrostatic self-assembly method is applied to couple ZnSe quantum dots(QDs)with a flower-like cov...Hydrogen peroxide(H_(2)O_(2))has gained widespread attention as a versatile oxidant and a mild disin-fectant.Here,an electrostatic self-assembly method is applied to couple ZnSe quantum dots(QDs)with a flower-like covalent organic framework(COF)to form a step-scheme(S-scheme)photocata-lyst for H_(2)O_(2)production.The as-prepared S-scheme photocatalyst exhibits a broad light absorption range with an edge at 810 nm owing to the synergistic effect between the ZnSe QDs and COF.The S-scheme charge-carrier transfer mechanism is validated by performing Fermi level calculations and in-situ X-ray photoelectron and femtosecond transient absorption spectroscopies.Photolumi-nescence,time-resolved photoluminescence,photocurrent response,electrochemical impedance spectroscopy,and electron paramagnetic resonance results show that the S-scheme heterojunction not only promotes charge carrier separation but also boosts the redox ability,resulting in enhanced photocatalytic performance.Remarkably,a 10%-ZnSe QD/COF has excellent photocatalytic H_(2)O_(2)-production activity,and the optimal S-scheme composite with ethanol as the hole scavenger yields a H_(2)O_(2)-production rate of 1895 mol g^(-1)h^(-1).This study presents an example of a high-performance organic/inorganic S-scheme photocatalyst for H_(2)O_(2)production.展开更多
文摘近义词“稍微”和“有点(儿)”的连用用法已进入两词的词典释义,过往研究较多关注于连用本身,探索“为何要连用”,即连用功能,至于程度副词与后续成分的双向选择性,即“为何能连用”——连用机制的研究有待深入,机制分析能够影响“信息处理”和“二语教学”等应用领域,有较大价值。本文关注程度副词对后续成分句法语义方面的选择限制。句法上,程度副词“有点(儿)”和“稍微有点(儿)”能修饰一些具有性状义的名词(组),“稍微”基本不修饰名词(组),揭示出“有点(儿)”的句法特征对“稍微有点(儿)”连用形式的约束更强。语义上,观察“稍微”对后续成分量度方面的选择限制,“稍微”的后续成分倾向于两端边界确定的成分,“有点(儿) x”表示线段型成分,这是“有点(儿) x”能够受“稍微”修饰并形成常用连用的重要原因。The consecutive usage of the synonyms “slightly” and “a bit (of)” has been incorporated into the dictionary definitions of both words. Previous research has primarily focused on the phenomenon of consecutive usage itself, exploring “why they are used consecutively,” i.e., their combined functions. However, the bidirectional selectivity between degree adverbs and their subsequent components, which explains “why they can be used consecutively”—the study of consecutive mechanisms—remains to be delved into more deeply. Mechanism analysis holds significant value as it can impact applied fields such as “information processing” and “second language teaching”. This article focuses on the syntactic and semantic selection limitations of degree adverbs on subsequent components. Syntactically, the degree adverbs “youdian(er)” and “shaoweiyoudian(er)” can modify some nouns (groups) with characteristic meanings, while “shaowei” basically does not modify nouns (groups), revealing that the syntactic feature of “youdian(er)” imposes stronger constraints on the combination form of “shaoweiyoudian(er)”. Semantically, the subsequent components of “shaowei” tend to be components with fixed boundaries at both ends, while “youdian (er) x” represents a line segment type component. This is an important reason why “youdian (er) x” can be modified by “shaowei” and form commonly used combinations.
基金Project(2023A1515012146)supported by the Guangdong Basic and Applied Research Foundation,ChinaProjects(52271083,51901253,52371059,52071091)supported by the National Natural Science Foundation of ChinaProject(2023HA-TYUTKFYF029)supported by the Open Research Fund from the Hai’an&Taiyuan University of Technology Advanced Manufacturing and Intelligent Equipment Industrial Research Institute,China。
文摘Copper-nickel alloys can suffer severe localized corrosion in marine environments containing sulfate-reducing bacteria(SRB),but the effect of SRB on the under-deposit corrosion of copper-nickel alloys is unknown.In this work,the corrosion behavior of B10 copper-nickel alloy beneath a deposit caused by SRB with carbon source starvation in artificial seawater was studied based on electrochemical measurements and surface analysis.Results demonstrate that SRB with an organic carbon starvation can survive in artificial water but most SRB cells have died.The survived SRB cells can attach to the bare and deposit-covered B10 copper-nickel alloy,leading to the corrosion acceleration.Due to the limitation of organic carbon source,the pitting corrosion of B10 copper-nickel alloy caused by SRB is not serious.However,serious pitting corrosion of the deposit-covered B10 copper-nickel alloy can be found both in abiotic and biotic conditions,and the pitting corrosion and uniform corrosion are further accelerated by SRB.There is a galvanic effect between the bare and deposit-covered specimens in the presence of SRB in the early stage but the galvanic effect after 5 d of testing can be neglected due to the low OCP difference values.
文摘Hydrogen peroxide(H_(2)O_(2))has gained widespread attention as a versatile oxidant and a mild disin-fectant.Here,an electrostatic self-assembly method is applied to couple ZnSe quantum dots(QDs)with a flower-like covalent organic framework(COF)to form a step-scheme(S-scheme)photocata-lyst for H_(2)O_(2)production.The as-prepared S-scheme photocatalyst exhibits a broad light absorption range with an edge at 810 nm owing to the synergistic effect between the ZnSe QDs and COF.The S-scheme charge-carrier transfer mechanism is validated by performing Fermi level calculations and in-situ X-ray photoelectron and femtosecond transient absorption spectroscopies.Photolumi-nescence,time-resolved photoluminescence,photocurrent response,electrochemical impedance spectroscopy,and electron paramagnetic resonance results show that the S-scheme heterojunction not only promotes charge carrier separation but also boosts the redox ability,resulting in enhanced photocatalytic performance.Remarkably,a 10%-ZnSe QD/COF has excellent photocatalytic H_(2)O_(2)-production activity,and the optimal S-scheme composite with ethanol as the hole scavenger yields a H_(2)O_(2)-production rate of 1895 mol g^(-1)h^(-1).This study presents an example of a high-performance organic/inorganic S-scheme photocatalyst for H_(2)O_(2)production.
