Pt-based magnetic nano catalysts are one of the most suitable cand idates for electrocatalytic materials due to their high electrochemistry activity and retrievability.Unfortunately,the inferior durability prevents th...Pt-based magnetic nano catalysts are one of the most suitable cand idates for electrocatalytic materials due to their high electrochemistry activity and retrievability.Unfortunately,the inferior durability prevents them from being scaled-up,limiting their commercial applications.Herein,an antiferromagnetic element Mn was introduced into PtCo nanostructured alloy to synthesize uniform Mn-PtCo truncated octahedral nanoparticles(TONPs)by one-pot method.Our results show that Mn can tune the blocking temperature of Mn-PtCo TONPs due to its an tiferromag netism.At low temperatures,Mn-PtCo TONPs are ferromag netic,and the coercivity in creases gradually with in creasi ng Mn contents.At room temperature,the Mn-PtCo TONPs display superparamag netic behavior,which is greatly helpful for in dustrial recycling.Mn doping can not only modify the electronic structure of PtCo TONPs but also enhanee electrocatalytic performance for methanol oxidation reaction.The maximum specific activity of Mn-PtCo-3 reaches 8.1 A`m^-2,3.6 times of commercial Pt/C(2.2 A·m^-2)and 1.4 times of PtCo TONPs(5.6 A`m^-2),respectively.The mass activity decreases by only 30%after 2,000 cycles,while it is 45%and 99%(nearly inactive)for PtCo TONPs and commercial Pt/C catalysts,respectively.展开更多
In this paper,we consider the truncated multiplicity finite range set problem of meromorphic functions on some complex disc.By using the value distribution theory of meromorphic functions,we establish a second main th...In this paper,we consider the truncated multiplicity finite range set problem of meromorphic functions on some complex disc.By using the value distribution theory of meromorphic functions,we establish a second main theorem for meromorphic functions with finite growth index which share meromorphic functions(may not be small functions).As its application,we also extend the result of a finite range set with truncated multiplicity.展开更多
目的分析腹腔镜胆囊切除术(laparoscopic cholecystectomy,LC)联合胆总管探查术(laparoscopic common bile duct exploration,LCBDE)治疗胆囊结石合并胆总管结石的临床效果。方法选取2015-07~2016-03该院收治的胆囊结石合并胆总管结石患...目的分析腹腔镜胆囊切除术(laparoscopic cholecystectomy,LC)联合胆总管探查术(laparoscopic common bile duct exploration,LCBDE)治疗胆囊结石合并胆总管结石的临床效果。方法选取2015-07~2016-03该院收治的胆囊结石合并胆总管结石患者90例,按手术方法不同分为对照组和观察组,各45例。对照组采用经内镜十二指肠乳头括约肌切开术(endoscopic sphincterotomy,EST)治疗,观察组采用LC+LCBDE治疗,对比两组患者手术情况及并发症发生率。结果两组患者住院时间、住院费用、手术成功率及残余结石率比较差异无统计学意义(P>0.05);观察组一期治愈率明显高于对照组,手术时间短于对照组,差异有统计学意义(P<0.05);观察组并发症发生率为11.11%,明显低于对照组的31.11%,差异有统计学意义(P<0.05)。结论 LC+LCBDE治疗胆囊结石合并胆总管结石临床效果显著,取石率高,可有效缓解患者临床症状,降低二次手术的风险,并发症少,安全性高,值得在临床应用中推广。展开更多
Objective:To study the laboratory and clinical predictors of hemorrhagic manifestations in dengue virus-infected patients.Methods:This was a single-center hospital-based prospective observational study.200 Dengue sero...Objective:To study the laboratory and clinical predictors of hemorrhagic manifestations in dengue virus-infected patients.Methods:This was a single-center hospital-based prospective observational study.200 Dengue seropositive patients were included in the study.A detailed clinical examination was done and comprehensive laboratory investigations were done.These parameters were compared between patients with and without hemorrhagic manifestations.Results:Out of the 200 patients,47(23.5%)had bleeding.64.5%Patients were males and 76.0%were under the age of 40 years.The most common presenting symptoms were fever(100.0%)followed by myalgia(77.0%),nausea and vomiting(56.0%).Leukocytosis,neutrophilia,thrombocytopenia,hyperbilirubinemia,transaminitis,decreased serum albumins,and raised D-dimer can serve as hematological,biochemical,and coagulation predictors of hemorrhagic manifestations for dengue.Conclusions:Dengue is a tropical infection with various complications.Bleeding complications are one of them.Laboratory parameters like white blood cells,platelets,bilirubin level,liver enzymes,and D-dimer can help to identify patients at risk for bleeding.Early identification and appropriate management can save a lot of resources and lives.展开更多
Matrix multiplication plays a pivotal role in the symmetric cipher algorithms, but it is one of the most complex and time consuming units, its performance directly affects the efficiency of cipher algorithms. Combined...Matrix multiplication plays a pivotal role in the symmetric cipher algorithms, but it is one of the most complex and time consuming units, its performance directly affects the efficiency of cipher algorithms. Combined with the characteristics of VLIW processor and matrix multiplication of symmetric cipher algorithms, this paper extracted the reconfigurable elements and analyzed the principle of matrix multiplication, then designed the reconfigurable architecture of matrix multiplication of VLIW processor further, at last we put forward single instructions for matrix multiplication between 4×1 and 4×4 matrix or two 4×4 matrix over GF(2~8), through the instructions extension, the instructions could support larger dimension operations. The experiment shows that the instructions we designed supports different dimensions matrix multiplication and improves the processing speed of multiplication greatly.展开更多
基金The work was supported by the National Natural Science Foundation(Nos.51625101,51431009,5180118&and 51701202)the State Key Development Program for Basic Research of China(No.2015CB921401)+3 种基金the Fundamental Research Funds for the Central University Universities of China(No.FRF-TP-16-001C2)the China Postdoctoral Science Foundation(No.2018M632792)Startup Research Fund of Zhengzhou University(No.32210815)Bejing Natural Science Foundation(No.Z180014).
文摘Pt-based magnetic nano catalysts are one of the most suitable cand idates for electrocatalytic materials due to their high electrochemistry activity and retrievability.Unfortunately,the inferior durability prevents them from being scaled-up,limiting their commercial applications.Herein,an antiferromagnetic element Mn was introduced into PtCo nanostructured alloy to synthesize uniform Mn-PtCo truncated octahedral nanoparticles(TONPs)by one-pot method.Our results show that Mn can tune the blocking temperature of Mn-PtCo TONPs due to its an tiferromag netism.At low temperatures,Mn-PtCo TONPs are ferromag netic,and the coercivity in creases gradually with in creasi ng Mn contents.At room temperature,the Mn-PtCo TONPs display superparamag netic behavior,which is greatly helpful for in dustrial recycling.Mn doping can not only modify the electronic structure of PtCo TONPs but also enhanee electrocatalytic performance for methanol oxidation reaction.The maximum specific activity of Mn-PtCo-3 reaches 8.1 A`m^-2,3.6 times of commercial Pt/C(2.2 A·m^-2)and 1.4 times of PtCo TONPs(5.6 A`m^-2),respectively.The mass activity decreases by only 30%after 2,000 cycles,while it is 45%and 99%(nearly inactive)for PtCo TONPs and commercial Pt/C catalysts,respectively.
基金Supported by National Natural Science Foundation of China(12061041)Jiangxi Provincial Natural Science Foundation(20232BAB201003).
文摘In this paper,we consider the truncated multiplicity finite range set problem of meromorphic functions on some complex disc.By using the value distribution theory of meromorphic functions,we establish a second main theorem for meromorphic functions with finite growth index which share meromorphic functions(may not be small functions).As its application,we also extend the result of a finite range set with truncated multiplicity.
文摘目的分析腹腔镜胆囊切除术(laparoscopic cholecystectomy,LC)联合胆总管探查术(laparoscopic common bile duct exploration,LCBDE)治疗胆囊结石合并胆总管结石的临床效果。方法选取2015-07~2016-03该院收治的胆囊结石合并胆总管结石患者90例,按手术方法不同分为对照组和观察组,各45例。对照组采用经内镜十二指肠乳头括约肌切开术(endoscopic sphincterotomy,EST)治疗,观察组采用LC+LCBDE治疗,对比两组患者手术情况及并发症发生率。结果两组患者住院时间、住院费用、手术成功率及残余结石率比较差异无统计学意义(P>0.05);观察组一期治愈率明显高于对照组,手术时间短于对照组,差异有统计学意义(P<0.05);观察组并发症发生率为11.11%,明显低于对照组的31.11%,差异有统计学意义(P<0.05)。结论 LC+LCBDE治疗胆囊结石合并胆总管结石临床效果显著,取石率高,可有效缓解患者临床症状,降低二次手术的风险,并发症少,安全性高,值得在临床应用中推广。
文摘Objective:To study the laboratory and clinical predictors of hemorrhagic manifestations in dengue virus-infected patients.Methods:This was a single-center hospital-based prospective observational study.200 Dengue seropositive patients were included in the study.A detailed clinical examination was done and comprehensive laboratory investigations were done.These parameters were compared between patients with and without hemorrhagic manifestations.Results:Out of the 200 patients,47(23.5%)had bleeding.64.5%Patients were males and 76.0%were under the age of 40 years.The most common presenting symptoms were fever(100.0%)followed by myalgia(77.0%),nausea and vomiting(56.0%).Leukocytosis,neutrophilia,thrombocytopenia,hyperbilirubinemia,transaminitis,decreased serum albumins,and raised D-dimer can serve as hematological,biochemical,and coagulation predictors of hemorrhagic manifestations for dengue.Conclusions:Dengue is a tropical infection with various complications.Bleeding complications are one of them.Laboratory parameters like white blood cells,platelets,bilirubin level,liver enzymes,and D-dimer can help to identify patients at risk for bleeding.Early identification and appropriate management can save a lot of resources and lives.
基金supported in part by open project foundation of State Key Laboratory of Cryptology National Natural Science Foundation of China (NSFC) under Grant No. 61272492, No. 61572521 and No. 61309008Natural Science Foundation for Young of Shaanxi Province under Grant No. 2013JQ8013
文摘Matrix multiplication plays a pivotal role in the symmetric cipher algorithms, but it is one of the most complex and time consuming units, its performance directly affects the efficiency of cipher algorithms. Combined with the characteristics of VLIW processor and matrix multiplication of symmetric cipher algorithms, this paper extracted the reconfigurable elements and analyzed the principle of matrix multiplication, then designed the reconfigurable architecture of matrix multiplication of VLIW processor further, at last we put forward single instructions for matrix multiplication between 4×1 and 4×4 matrix or two 4×4 matrix over GF(2~8), through the instructions extension, the instructions could support larger dimension operations. The experiment shows that the instructions we designed supports different dimensions matrix multiplication and improves the processing speed of multiplication greatly.
