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Role of the Greenland Sea ice anomaly in the late-spring drought over Northwest China

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 1-5页

作者： Yang liu Huopo Chen Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of SciencesBeijingChina Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University for Information Science and TechnologyNanjingChina

Drought across Northwest China in late spring has exerted a vital effect on the local climate and agricultural production,and has been alleviated during the past *** study explored the influence of the preceding Arctic sea ice on the May drought in Northwest China caused by the precipitation *** analysis indicated that when the Greenland Sea ice concentration is abnormally high during February to April,the dry conditions in Northwest China tend to be *** increase of sea ice in the Greenland Sea can excite a meridional circulation,which causes sea surface temperature(SST)anomalies in the North Atlantic via the sea-air interaction,manifested as significant warm SST anomalies over the south of Greenland and the subtropical North Atlantic,but negative SST anomalies over the west of the *** abnormal SST pattern maintains to May and triggers a zonal wave train from the North Atlantic through Scandinavia and Central Asia to Northwest China,leading to abnormal cyclones in Northwest ***,Northwest China experiences a more humid climate than usual.

关键词： Arctic sea ice Greenland Sea North Atlantic SST Drought Northwest China

A Self-Biased Low-Jitter Process-Insensitive Phase-Locked Loop for 1.25Gb/s-6.25Gb/s SerDes

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Chinese Journal of Electronics 2018年第5期27卷 1009-1014页

作者： YUAN Hengzhou guo Yang liu Yao liang Bin guo Qiancheng College of Computer Science National University of Defense Technology

The paper presents a fully integrated multiphase output low-jitter CMOS phase-locked loop for1.25 Gb/s to 6.25 Gb/s wireline Ser Des transmitter clocking. The self-biased bandwidth technology with simplified structure is applied to reduce the sensitivity to process variations. A differential Charge pump(CP) which is suitable for low power supply and process migration is proposed. An accelerator is built to avoid the disadvantage of great damping factor. Self-adaptive frequency dividers are used to improve power efficiency. The simulation results under 65 nm and 55 nm process almost maintain almost the same jitter performance and show the high process insensitivity and good jitter performance.

关键词： Phase-locked loop(PLL) Self-biased Low-jitter Process-insensitive Serializer-deserializer

血管内介入治疗锁骨下动脉盗血综合征临床研究

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中国临床神经科学 2016年第6期24卷 627-634,677页

作者：胡华刘锋昌范凯腾国良刘建林西安市北方医院神经内科 710043 西安交通大学第一附属医院血管外科 710061

目的探讨应用血管内介入治疗锁骨下动脉盗血综合征的有效性和安全性。方法回顾性分析53例经血管内介入的锁骨下动脉盗血综合征患者的临床资料,从手术成功率、手术并发症及术后随访情况观察血管内介入治疗的有效性和安全性。结果 45/53例... 详细信息

目的探讨应用血管内介入治疗锁骨下动脉盗血综合征的有效性和安全性。方法回顾性分析53例经血管内介入的锁骨下动脉盗血综合征患者的临床资料,从手术成功率、手术并发症及术后随访情况观察血管内介入治疗的有效性和安全性。结果 45/53例(84.90%)锁骨下动脉狭窄患者和8/53例(15.09%)完全锁骨下动脉闭塞患者均成功进行了血管内介入治疗,术后症状明显缓解。53例患者中发生手术并发症5次(9.43%),但未出现神经功能缺损和危及生命的手术并发症。锁骨下动脉闭塞的手术并发症发生率(37.50%)较锁骨下动脉狭窄(4.44%)显著升高(P<0.05)。随访50/53例患者,随访率94.34%,平均随访时间(18.6±1.2)个月。1例患者术后12个月再狭窄率超过90%,行二次球囊成型;其余患者预后良好。结论应用血管内介入治疗锁骨下动脉盗血综合征具有微创、安全、高效优点,可作为首选治疗方法。

关键词：锁骨下动脉盗血综合征介入治疗支架

Research on Vehicle Routing Problem with Soft Time Windows Based on Hybrid Tabu Search and Scatter Search Algorithm

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Computers, Materials & Continua 2020年第9期64卷 1945-1958页

作者： Jinhui Ge Xiaoliang liu guo liang School of Mathematics Tonghua Normal UniversityTonghua134000China School of Computer Science and Technology Hunan University of Technology and BusinessChangsha410205China School of Bioinformatics University of MinnesotaTwin CitiesUSA

With the expansion of the application scope of social computing problems,many path problems in real life have evolved from pure path optimization problems to social computing problems that take into account various social attributes,cultures,and the emotional needs of *** actual soft time window vehicle routing problem,speeding up the response of customer needs,improving distribution efficiency,and reducing operating costs is the focus of current social computing ***,designing fast and effective algorithms to solve this problem has certain theoretical and practical *** this paper,considering the time delay problem of customer demand,the compensation problem is given,and the mathematical model of vehicle path problem with soft time window is *** paper proposes a hybrid tabu search(TS)&scatter search(SS)algorithm for vehicle routing problem with soft time windows(VRPSTW),which mainly embeds the TS dynamic tabu mechanism into the SS algorithm *** uses the scattering of SS to avoid the dependence on the quality of the initial solution,and SS uses the climbing ability of TS improves the ability of optimizing,so that the quality of search for the optimal solution can be significantly *** hybrid algorithm is still based on the basic framework of *** particular,TS is mainly used for solution improvement and combination to generate new *** the solution process,both the quality and the dispersion of the solution are considered.A simulation experiments verify the influence of the number of vehicles and maximum value of tabu length on solution,parameters’control over the degree of convergence,and the influence of the number of diverse solutions on algorithm *** on the determined parameters,simulation experiment is carried out in this paper to further prove the algorithm feasibility and *** results of this paper provide further ideas for solving vehicle routing problems with time

关键词： Time window tabu search scatter search vehicle routing problem with soft time windows(VRPSTW).

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun liu Yiren Yu guoshu Gao Yumeng Zhao Xiongfu Zhang guodong liu guohui Yang State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

Synthesis of faveolate open-structured Ru-N/C cathode catalyst with high bifunctional activity for rechargeable quasi-solid-state Li-O_(2)batteries

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Nano Research 2025年第1期18卷 351-361页

作者： Tie liu School of Chemistry and Chemical Engineering Heze UniversityHeze 274015China

The constituents and geometric design of cathodic electrocatalyst to achieve high activity and durability are effective but challenging for the development of high-performance Li-O_(2)*** study employs a mild solution precipitation method followed by thermolysis to construct a faveolate open-structured Ru-N/C matrix with a loosely braided network morphology as a bifunctional *** details prove that this hybrid structure is composed of ultrafine Ru globular nanoparticles(ca.2 nm)coated with an N-enriched carbon film and exhibits a valuable beehive through-hole character for rapid mass transport during oxygen redox *** synergistic effect of open-structured and reticular network matrix with metal-N4 coordination induces asymmetric charge distributions with moderate adsorption/desorption behaviour with oxygen ***,this particular Ru-N/C matrix cathode provides a promising Li_(2)O_(2)accommodation space and exhibits superior electrochemical performance in terms of a positive discharge plateau and low charge ***,the assembled batteries also present a high discharge capacity and a long cycle life(exceeding 283 cycles).The density functional theory(DFT)calculations also corroborate the assertion that the Ru-N/C catalyst exhibits robust electronic coupling transfer and superior bifunctional *** such,our work demonstrates that this type of open-structured Ru-N/C matrix is promising for fabricating high-performance quasi solid-state Li-O_(2)batteries.

关键词： ruthenium nitride nitrogen-doped carbon electrocatalyst Li-O_(2)battery

不同介入时机早期康复治疗急性脑梗死临床疗效观察

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深圳中西医结合杂志 2016年第24期26卷 4-6页

作者：陈国梁刘结梅丁家谊梁伟财佛山市顺德区第一人民医院广东佛山528300

目的:探讨不同介入时机的早期康复治疗对于急性脑梗死患者的临床疗效。方法:选取佛山市顺德区第一人民医院2014年4月至2016年4月收治的急性脑梗死患者150例,按照随机原则将其分为3组,分别为A组、B组以及C组,各50例,均在临床按照常规给... 详细信息

目的:探讨不同介入时机的早期康复治疗对于急性脑梗死患者的临床疗效。方法:选取佛山市顺德区第一人民医院2014年4月至2016年4月收治的急性脑梗死患者150例,按照随机原则将其分为3组,分别为A组、B组以及C组,各50例,均在临床按照常规给予对症支持治疗,A、B和C组分别进行不同的康复训练措施,比较3组患者的运动功能评定量表(FUGL-MEYER)评分以及独立生活能力量表指数(BI)评分。结果:与治疗前比较,3组患者治疗后1个月和6个月的FUGL-MEYER评分和BI评分均明显好转,差异具有统计学意义(P<0.05)。A组患者治疗后1个月和6个月的FUGL-MEYER评分和BI评分明显优于B组和C组,差异具有统计学意义(P<0.05)。结论:针对急性脑梗死患者而言,及时进行康复训练不仅有效提高患者生活质量,还能大大降低疾病致残率,提高临床疗效。

关键词：急性脑梗死介入时机早期康复治疗

血管紧张素转化酶基因多态性与结直肠癌易感性关系的Meta分析

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胃肠病学和肝病学杂志 2018年第3期27卷 251-254页

作者：郭亮刘正昊崔君鹏刘宝林中国医科大学附属盛京医院普外科辽宁沈阳110004 中国医科大学第一临床医学院

目的探讨血管紧张素转化酶(angiotensin-converting enzyme,ACE)基因多态性与结直肠癌(colorectal cancer,CRC)易感性之间的关系。方法检索截至2017年4月各数据库发表的关于评价ACE基因多态性与CRC关系的研究,进行数据分析。结果有7篇... 详细信息

目的探讨血管紧张素转化酶(angiotensin-converting enzyme,ACE)基因多态性与结直肠癌(colorectal cancer,CRC)易感性之间的关系。方法检索截至2017年4月各数据库发表的关于评价ACE基因多态性与CRC关系的研究,进行数据分析。结果有7篇文献符合纳入标准,共7 813例患者纳入研究,其中病例组908例,对照组6 905例。ACE基因的3种基因型包括:缺失纯合子型(DD型)、插入纯合子型(II型)、缺失与插入纯合子型(ID),隐性基因模型比值比(OR)为1.10(95%CI:0.91~1.33),差异无统计学意义(P=0.34)。显性基因模型OR为0.25(95%CI:0.08~0.81),差异有统计学意义(P=0.02)。结论在显性基因模型下,ACE基因对CRC的发生有抑制作用。

关键词：血管紧张素转化酶结直肠癌 Meta分析

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黄土高原土壤干层研究述评

水土保持学报 2003年第6期17卷 156-159页

作者：王国粱刘国彬周生路南京大学城市与资源学系江苏南京210093 中科院水利部水土保持研究所陕西杨陵712100

从土壤干层的定义及土壤干层形成的气候、土壤、植被和人为因素等4个方面综述了黄土高原土壤干层研究的现状和问题,并指出了需要进一步加强的研究领域。

关键词：黄土高原土壤干层