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Statistical dynamics of noise-like rectangle pulse fiber laser

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Advanced Photonics Nexus 2023年第3期2卷 40-52页

作者： Yujia Li Dongmei Huang yihuan shi Chao Wang Feng Li The Hong Kong Polytechnic University Photonics Research InstituteDepartment of Electrical EngineeringHong KongChina The Hong Kong Polytechnic University Shenzhen Research InstituteShenzhenChina The Hong Kong Polytechnic University Photonics Research InstituteDepartment of Electronic and Information EngineeringHong KongChina

The statistical dynamics of partially incoherent ultrafast lasers are complex and chaotic,which is significant for fundamental research and practical *** experimentally and theoretically reveal the statistical dynamics of the spectral evolutions and correlations in an incoherent noise-like rectangle pulse laser(NLRPL).Based on statistical histogram analysis,the probability distribution asymmetry of the spectral intensity fluctuation is decayed with the wavelength far away from the spectral peak due to the detection *** full-spectral correlation values indicate that the spectral similarity between two round trips is exponentially weakened as the round-trip offset *** studying the correlation map of spectral components,we find that the area of the high-correlation region is relevant to the pump power,which is reduced by increasing the pump *** mutual information of the spectra demonstrates that two spectral components with symmetry about the spectral peak have a statistical *** observations and statistical properties can coincide well with theoretical numerical *** reveal the pump-dependent spectral correlation of the NLRPL and provide multiple statistical methods for the characterizations of chaotic dynamics in incoherent light sources.

关键词： fiber laser statistical analysis laser dynamics noise-like rectangle laser

Measurement on transmittance uniformity and angle dependence of automatic welding filter(AWF)

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Measurement on transmittance uniformity and angle dependence...

地杆菌α-L-岩藻糖苷酶的分子改造及其在合成2’-岩藻糖基乳糖中的应用

作者： LIU Qinggang shi Wenze ZHUANG yihuan GUO Dehua State Key Laboratory of Precision Measurement Technology and Instruments Tianjin University China National Institute of Standardization

In order to realize the measurement of transmittance uniformity and angle dependence to detect the personal protection quality parameters of AWF,an innovative AWF measuring instrument including scanning controller based on 4-dimensional motion platform,which can realize the measurement of the above two indexes,are trial produced and tested according to the requirements in the national standard of *** experiment results of transmittance uniformity and angle dependent of AWF achieved by this instrument have good consistency with the data provided by the *** shows that the measurement system has achieved high accuracy and stability in accordance with the national standard of China,and can test and analyze the related parameters of popular types of AWF according to the requirements in the national standard of China.

关键词： automatic welding filter(AWF) transmittance uniformity angle dependence 4-D automatic scanning platform AWF parameter measuring equipment test and analysis

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食品科学 2021年第18期42卷 135-142页

作者：史然张登娅谷懿寰江正强杨绍青中国轻工食品生物工程重点实验室中国农业大学食品科学与营养工程学院北京100083

对地杆菌α-L-岩藻糖苷酶进行分子改造,以提高其酶法合成2’-岩藻糖基乳糖(2’-fucosyllactose,2’-FL)的转化效率。利用易错聚合酶链式反应构建了α-L-岩藻糖苷酶的突变体文库,筛选得到一个合成2’-FL转化率提高的突变酶(mPbFuc29A1)... 详细信息

对地杆菌α-L-岩藻糖苷酶进行分子改造,以提高其酶法合成2’-岩藻糖基乳糖(2’-fucosyllactose,2’-FL)的转化效率。利用易错聚合酶链式反应构建了α-L-岩藻糖苷酶的突变体文库,筛选得到一个合成2’-FL转化率提高的突变酶(mPbFuc29A1)。酶学性质研究结果表明mPbFuc29A1的最适pH值和温度分别为pH 5.0和40℃,最适温度较野生型PbFuc29A1提高了5℃;突变酶水解2’-FL的比活力提高到3倍,但是水解4-硝基苯基-α-L-岩藻糖苷(4-nitrophenyl-α-L-fucopyranoside,pNP-FUC)和3’-岩藻糖基乳糖(3’-fucosyllactose,3’-FL)的比活力分别降低了22.8%和52.5%。以pNP-FUC和乳糖为底物,采用mPbFuc29A1酶法催化合成2’-FL和3’-FL,转化率分别为23.6%和56.4%,其中2’-FL的转化率较PbFuc29A1提高了9.1%。通过序列及定点突变分析发现mPbFuc29A1的氨基酸序列中有2个位点发生突变(Asp21Val和Glu266Lys),其中位于loop区的Glu266Lys可能是mPbFuc29A1底物特异性和转糖苷产物组成发生改变的关键。优良的酶学特性使mPbFuc29A1在2’-FL合成中具有较大的应用潜力。

关键词： α-L-岩藻糖苷酶定向进化底物特异性转糖苷活性 2’-岩藻糖基乳糖

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50m跨箱梁底板裂纹分析与建议

四川建筑科学研究 2008年第2期34卷 76-78页

作者：石启印金益桓黄晓平江苏大学土木系江苏镇江212013

由于大桥在施工过程中,在每一施工段与下一施工段的施工缝处靠近前一施工段悬臂端发现了有裂纹,通过理论分析和计算机模拟,找出裂缝产生的原因,采取了相应的措施,并取得了较好的成果。

关键词： MSS移动模架箱梁裂纹弯拉应力节段模型

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焊接护目镜的透射比均匀性和角度依赖性研究

中国安全科学学报 2019年第10期29卷 130-134页

作者：刘庆纲施文泽庄逸欢郭德华天津大学精密测试技术及仪器国家重点实验室天津300072 中国标准化研究院北京100191

为了保证自动变光焊接护目镜(AWF)的产品质量,进而保障焊工的用眼安全,首先分析AWF的透射比均匀性和角度依赖性的机制和测量方法,研制基于四维自动扫描运动平台的新型AWF测量系统;然后利用该系统检测AWF透射比均匀性和角度依赖性指标,... 详细信息

为了保证自动变光焊接护目镜(AWF)的产品质量,进而保障焊工的用眼安全,首先分析AWF的透射比均匀性和角度依赖性的机制和测量方法,研制基于四维自动扫描运动平台的新型AWF测量系统;然后利用该系统检测AWF透射比均匀性和角度依赖性指标,并分析测量结果。研究表明:透射比均匀性和角度依赖性能直接反映出AWF的技术性能,是评价AWF产品质量的重要技术指标;系统获得的结果与产品标称数据具有很好的一致性,可作为标准检测器具广泛应用。

关键词：自动变光焊接护目镜(AWF) 透射比均匀性角度依赖性四维自动扫描平台测量系统

3D‑Printed Carbon‑Based Conformal Electromagnetic Interference shielding Module for Integrated Electronics

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Nano-Micro Letters 2024年第5期16卷 87-101页

作者： Shaohong shi Yuheng Jiang Hao Ren Siwen Deng Jianping Sun Fangchao Cheng Jingjing Jing Yinghong Chen State Key Laboratory of Featured Metal Materials and Life‑Cycle Safety for Composite Structures School of ResourcesEnvironment and MaterialsGuangxi UniversityNo.100Daxuedong RoadNanning 530004People’s Republic of China State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan UniversitySichuan UniversityNo.24 South Section 1Yihuan RoadChengdu 610065People’s Republic of China

Electromagnetic interference shielding(EMI SE)modules are the core com-ponent of modern ***,the tra-ditional metal-based SE modules always take up indispensable three-dimensional space inside electronics,posing a major obstacle to the integra-tion of *** innovation of integrating 3D-printed conformal shielding(c-SE)modules with packaging materials onto core electronics offers infinite possibilities to satisfy ideal SE func-tion without occupying additional ***,the 3D printable carbon-based inks with various proportions of graphene and carbon nanotube nanoparticles are well-formulated by manipulating their rheological ***,the free-constructed architectures with arbitrarily-customized structure and multifunctionality are created via 3D *** particular,the SE performance of 3D-printed frame is up to 61.4 dB,simultaneously accompanied with an ultralight architecture of 0.076 g cm^(-3) and a superhigh specific shielding of 802.4 dB cm3 g^(-1).Moreover,as a proof-of-concept,the 3D-printed c-SE module is in situ integrated into core electronics,successfully replacing the traditional metal-based module to afford multiple functions for electromagnetic compatibility and thermal ***,this scientific innovation completely makes up the blank for assembling carbon-based c-SE modules and sheds a brilliant light on developing the next generation of high-performance shielding materials with arbitrarily-customized structure for integrated electronics.

关键词： 3D printing Carbon-based nanoparticles Conformal electromagnetic interference shielding Integrated electronics

氟西汀对慢性不可预见应激模型大鼠海马脂质的影响

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中华行为医学与脑科学杂志 2021年第11期30卷 977-983页

作者：于欢周翠红薛姗姗石青青陈怡环中国人民解放军空军军医大学第一附属医院心身科西安710032

目的探讨氟西汀(fluoxetine,Flx)对慢性不可预见应激抑郁(chronic unpredictable stress,CUS)模型大鼠海马脂质的影响。方法30只Sprague-Dawley大鼠按随机数字表法随机分为Sham组、CUS组和CUS+Flx组,每组10只。CUS组和CUS+Flx组大鼠连续28 d每天接受一至两种随机的刺激,进行CUS造模,随后这两组大鼠分别接受腹腔注射1 ml/kg生理盐水和10 mg/kg氟西汀,每天1次,连续14 d。Sham组大鼠在笼中正常饲养28 d,然后腹腔注射生理盐水(1 ml/kg),每天1次,连续14 d。在最后一次注射后24 h进行糖水偏好实验,随后处死大鼠,分离大鼠海马,通过高效液相色谱-质谱联用技术进行脂质水平检测,采用SIMCA-P 14.1和LipidSearch software version 4.1软件进行脂质相对含量分析。运用SPSS 19.0进行统计分析。运用单因素方差分析或Kruskal-Wallis检验进行多组间的比较,Bonferroni进行事后检验。运用Pearson相关或Spearman相关进行大鼠行为学指标和海马脂质分子水平的相关分析。结果3组大鼠糖水偏好实验差异有统计学意义(F=12.830,P<0.001)。其中,CUS组大鼠[(43.57±12.38)%]糖水偏好率明显低于Sham组[(67.09±11.81)%]和CUS+Flx组[(62.74±8.58)%],均差异有统计学意义(均P<0.05)。脂质检测分析显示,三组间存在95个差异性脂质小分子,主要分布于甘油磷脂类和鞘脂类。相关分析发现磷脂酰乙醇胺(phosphatidylethanolamine,PE)类的脂质小分子中PE(34∶1e)+H、PE(18∶1p/20∶1)+H、PE(18∶1/18∶1)+Na、PE(36∶2p)-H、PE(16∶0/20∶4)-H、PE(18∶0/18∶2)-H、PE(16∶0e/22∶6)-H、PE(18∶1/20∶4)-H及鞘脂类的CerG1(d18∶2/24∶0+O)+H与大鼠糖水偏好率呈负相关(r=-0.477,-0.433,-0.603,-0.382,-0.464,-0.482,-0.514,-0.511,-0.490;均P<0.05)。而PE(42∶6p)+Na、PE(34∶0p)-H和鞘脂类SM(d22∶1/16∶0)+HCOO与大鼠糖水偏好率呈正相关(均r=0.379,0.397,0.388;均P<0.05)。结论氟西汀对CUS模型大鼠的抑郁样行为的改善作用可能与其调节海马甘油磷脂及鞘脂类水平有关。

关键词：抑郁症海马脂质组学氟西汀大鼠

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汉语叹词研究综述

重庆理工大学学报（社会科学） 2018年第7期32卷 135-139页

作者：黄弋桓西南大学外国语学院重庆400715 重庆交通大学外国语学院重庆400074

汉语叹词因其句法功能的单一性而被视作一类特殊的词。自《马氏文通》以来,学界对叹词的划界、叹词的归属、叹词的成员、叹词的意义,包括叹词的地位等方面的研究已取得丰硕成果,但叹词研究仍有值得深入之处,诸如叹词的句法位置、叹词携... 详细信息

汉语叹词因其句法功能的单一性而被视作一类特殊的词。自《马氏文通》以来,学界对叹词的划界、叹词的归属、叹词的成员、叹词的意义,包括叹词的地位等方面的研究已取得丰硕成果,但叹词研究仍有值得深入之处,诸如叹词的句法位置、叹词携带的内容、叹词词类系统的封闭性与开放性等。

关键词：叹词词类归属叹词化意义地位

Mitochondria-acting carrier-free nanoplatform self-assembled by a-tocopheryl succinate carrying cisplatin for combinational tumor therapy

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Regenerative Biomaterials 2021年第4期8卷 51-61页

作者： Heng Mei Jing Li Shengsheng Cai Xuequan Zhang Wenqiang shi Hai Zhu Jun Cao Bin He National Engineering Research Center for Biomaterials Sichuan UniversityNo.29 Wangjiang RoadChengdu 610064China School of Chemical Engineering Sichuan UniversityNo.24 South Section 1Yihuan RoadChengdu 610065China

Unsatisfactory drug loading capability,potential toxicity of the inert carrier and the limited therapeutic effect of a single chemotherapy drug are all vital inhibitory factors of carrier-assisted drug delivery systems for *** address the above obstacles,a series of carrier-free nanoplatforms self-assembled by dual-drug conjugates was constructed to reinforce chemotherapy against tumors by simultaneously disrupting intratumoral DNA activity and inhibiting mitochondria *** this nanoplatform,the mitochondria-targeting small-molecular drug,a-tocopheryl succinate(TOS),firstly self-assembled into nanoparticles,which then were used as the carrier to conjugate cisplatin(CDDP).Systematic characterization results showed that this nanoplatform exhibited suitable particle size and a negative surface charge with good stability in physicochemical environments,as well as pH-sensitive drug release and efficient cellular *** to the combined effects of reactive oxygen species(ROS)generation by TOS and DNA damage by CDDP,the developed nanoplatform could induce mitochondrial dysfunction and elevated cell apoptosis,resulting in highly efficient anti-tumor outcomes in ***,the combined design principles adopted for carrier-free nanodrugs construction in this study aimed at targeting different intracellular organelles for facilitating ROS production and DNA disruption can be extended to other carrier-free nanodrugs-dependent therapeutic systems.

关键词： carrier-free nanodrugs cisplatin a-tocopheryl succinate dual-drug conjugate