This scientific paper is a comparative analysis of two mathematical conjectures. The newly proposed -3(-n) - 1 Remer conjecture and how it is related to and a proof of the more well known 3n + 1 Collatz conjecture. An...This scientific paper is a comparative analysis of two mathematical conjectures. The newly proposed -3(-n) - 1 Remer conjecture and how it is related to and a proof of the more well known 3n + 1 Collatz conjecture. An overview of both conjectures and their respective iterative processes will be presented. Showcasing their unique properties and behavior to each other. Through a detailed comparison, we highlight the similarities and differences between these two conjectures and discuss their significance in the field of mathematics. And how they prove each other to be true.展开更多
The radiation shielding characteristics of 50wt% WO3/E44 epoxy composite in various gamma energies from 80 keV to 1.33 MeV are investigated via the MCNP code. Thus two scales are considered for WOa filler particles： ...The radiation shielding characteristics of 50wt% WO3/E44 epoxy composite in various gamma energies from 80 keV to 1.33 MeV are investigated via the MCNP code. Thus two scales are considered for WOa filler particles： micro and nano with sizes of i #m and 5Onto, respectively. The simulation results show that W03 nano particles exhibit a larger increase in linear attenuation coefficient in comparison with micro size particles. Finally, validation of simulation results with the published experimental data shows a good agreement.展开更多
Rosa sterilis S.D.Shi is an important economic tree in China that produces fruits with high nutritional and medicinal value.Many of R.sterills’organs are covered with different types of trichomes or prickles that dir...Rosa sterilis S.D.Shi is an important economic tree in China that produces fruits with high nutritional and medicinal value.Many of R.sterills’organs are covered with different types of trichomes or prickles that directly affect fruit appearance and plant management.This study used RNA sequencing technology to analyze the transcriptomes of two parts of the inflorescence branch,namely inflorescence stems with flagellated trichomes and pedicels with both flagellated and glandular trichomes.Comparative transcriptomic analysis showed that many transcription factors(TFs)are potentially involved in the formation and development of trichomes.The accumulation of RsETC1,a TF of the R3-MYB family,was significantly higher in inflorescence stems than in pedicels;quantitative reverse transcription PCR(qRTPCR)verified that its expression was significantly higher in inflorescence stems than in pedicels during the first three development stages,indicating its inhibitory action on the initiation of glandular trichomes in R.sterilis.The mRNA level of RsETC1 accumulated to significantly higher levels in trichomeless tissues than in tissues with trichromes,suggesting that this gene may inhibit the formation of trichomes in R.sterilis.Over-expression of RsETC1 in Arabidopsis resulted in glabrous phenotypes,and the expression of trichome-related endogenous genes,except for TTG1,was markedly reduced.In addition,the contents of the phytohormones jasmonic acid(JA),gibberellin A3(GA_(3)),and cytokinins(CKs)in pedicels were significantly higher than those in inflorescence stems,and the expression patterns of the genes related to hormone biosynthesis and signal transduction presented consistent responses,suggesting that the transduction of these hormones might be crucial for trichome initiation and development.These data provide a new perspective for revealing the molecular mechanism of trichome formation in R.sterilis.展开更多
The observation data collected by DSG3 precipitation phenomenon observation instrument and the manual parallel observation data in 5 stations of Gansu Province from January 2018 to December 2019 were compared and anal...The observation data collected by DSG3 precipitation phenomenon observation instrument and the manual parallel observation data in 5 stations of Gansu Province from January 2018 to December 2019 were compared and analyzed.The results show that the missing observation rate of the observation instrument was 0%,and the performance of the equipment was good;the empty forecast rate of drizzle was the highest;the false forecast rate of hail was the highest,and the accuracy of automatic observation records was relatively poor;the capture rate and empty forecast rate of rain and snow were higher,while their false forecast rate and missing forecast rate were lower.The capture rate and missing forecast rate of sleet were higher,and its missing forecast rate was low;the accuracy of automatic observation was better.It shows that the empty forecast and false forecast of DSG3 precipitation phenomenon observation instrument mainly occurred in weak precipitation phenomena,and the recognition of drizzle and hail was poor.展开更多
Objective To evaluate and compare 3 kinds of cecocloln urinary reservoir. Methods Perm pouch, indiana pouch or detenial cecocolon reservoir has been performed for 37 patients. The outcome was evaluated by urodynamic a...Objective To evaluate and compare 3 kinds of cecocloln urinary reservoir. Methods Perm pouch, indiana pouch or detenial cecocolon reservoir has been performed for 37 patients. The outcome was evaluated by urodynamic and clinically. Results Good continence has been achieved in all patients with an appendiceal continence mechanism. The capacity and intrareservoir pressure of detenial cecocolon was significantly different from penn or indiana pouch 3 months postoperatively (P【0.01) whereas the difference became in no significant 12 months postoperativelly (P】0. 05). The intrareservoir pressure on contraction was lower with penn pouch. Conclusion The penn or modified indiana pouch is better and more ideal as a urinary reservoir whereas the detenial cecocolon pouch is technically simpler. 6 refs,1 tab.展开更多
应用比较分子力场分析(Comparative molecular force field analysis,CoMFA)方法研究了18种氟喹诺酮C-3噻唑酮衍生物对胰腺Capan-1细胞的体外抗增殖活性(p A).训练集中14个化合物用于建立预测模型,测试集6个化合物(含模板分子和新设计的...应用比较分子力场分析(Comparative molecular force field analysis,CoMFA)方法研究了18种氟喹诺酮C-3噻唑酮衍生物对胰腺Capan-1细胞的体外抗增殖活性(p A).训练集中14个化合物用于建立预测模型,测试集6个化合物(含模板分子和新设计的1个分子)作为模型验证.通过基于配体的原子契合的叠合方式,获得了训练集的统计显著模型.CoMFA模型使用3个主成分给出交叉验证系数(R 2 cv)值为0.436,非交叉验证系数(R 2)值为0.956,估计F值为72.217.结果显示,模型具有良好的稳健性与预测能力.基于CoMFA等高线图,揭示了该系列化合物抗增殖活性的一些关键结构因素.这些结果为理解其作用机制、设计具有高抗肿瘤活性的新型氟喹诺酮C-3噻唑酮类化合物提供有益的理论参考.展开更多
文摘This scientific paper is a comparative analysis of two mathematical conjectures. The newly proposed -3(-n) - 1 Remer conjecture and how it is related to and a proof of the more well known 3n + 1 Collatz conjecture. An overview of both conjectures and their respective iterative processes will be presented. Showcasing their unique properties and behavior to each other. Through a detailed comparison, we highlight the similarities and differences between these two conjectures and discuss their significance in the field of mathematics. And how they prove each other to be true.
文摘The radiation shielding characteristics of 50wt% WO3/E44 epoxy composite in various gamma energies from 80 keV to 1.33 MeV are investigated via the MCNP code. Thus two scales are considered for WOa filler particles： micro and nano with sizes of i #m and 5Onto, respectively. The simulation results show that W03 nano particles exhibit a larger increase in linear attenuation coefficient in comparison with micro size particles. Finally, validation of simulation results with the published experimental data shows a good agreement.
基金supported by grants from the Joint Fund of the National Natural Science Foundation of China and the Karst Science Research Center of Guizhou Province,China(U1812401)the Talent Project of Guizhou Province,China(20164016)。
文摘Rosa sterilis S.D.Shi is an important economic tree in China that produces fruits with high nutritional and medicinal value.Many of R.sterills’organs are covered with different types of trichomes or prickles that directly affect fruit appearance and plant management.This study used RNA sequencing technology to analyze the transcriptomes of two parts of the inflorescence branch,namely inflorescence stems with flagellated trichomes and pedicels with both flagellated and glandular trichomes.Comparative transcriptomic analysis showed that many transcription factors(TFs)are potentially involved in the formation and development of trichomes.The accumulation of RsETC1,a TF of the R3-MYB family,was significantly higher in inflorescence stems than in pedicels;quantitative reverse transcription PCR(qRTPCR)verified that its expression was significantly higher in inflorescence stems than in pedicels during the first three development stages,indicating its inhibitory action on the initiation of glandular trichomes in R.sterilis.The mRNA level of RsETC1 accumulated to significantly higher levels in trichomeless tissues than in tissues with trichromes,suggesting that this gene may inhibit the formation of trichomes in R.sterilis.Over-expression of RsETC1 in Arabidopsis resulted in glabrous phenotypes,and the expression of trichome-related endogenous genes,except for TTG1,was markedly reduced.In addition,the contents of the phytohormones jasmonic acid(JA),gibberellin A3(GA_(3)),and cytokinins(CKs)in pedicels were significantly higher than those in inflorescence stems,and the expression patterns of the genes related to hormone biosynthesis and signal transduction presented consistent responses,suggesting that the transduction of these hormones might be crucial for trichome initiation and development.These data provide a new perspective for revealing the molecular mechanism of trichome formation in R.sterilis.
文摘The observation data collected by DSG3 precipitation phenomenon observation instrument and the manual parallel observation data in 5 stations of Gansu Province from January 2018 to December 2019 were compared and analyzed.The results show that the missing observation rate of the observation instrument was 0%,and the performance of the equipment was good;the empty forecast rate of drizzle was the highest;the false forecast rate of hail was the highest,and the accuracy of automatic observation records was relatively poor;the capture rate and empty forecast rate of rain and snow were higher,while their false forecast rate and missing forecast rate were lower.The capture rate and missing forecast rate of sleet were higher,and its missing forecast rate was low;the accuracy of automatic observation was better.It shows that the empty forecast and false forecast of DSG3 precipitation phenomenon observation instrument mainly occurred in weak precipitation phenomena,and the recognition of drizzle and hail was poor.
文摘Objective To evaluate and compare 3 kinds of cecocloln urinary reservoir. Methods Perm pouch, indiana pouch or detenial cecocolon reservoir has been performed for 37 patients. The outcome was evaluated by urodynamic and clinically. Results Good continence has been achieved in all patients with an appendiceal continence mechanism. The capacity and intrareservoir pressure of detenial cecocolon was significantly different from penn or indiana pouch 3 months postoperatively (P【0.01) whereas the difference became in no significant 12 months postoperativelly (P】0. 05). The intrareservoir pressure on contraction was lower with penn pouch. Conclusion The penn or modified indiana pouch is better and more ideal as a urinary reservoir whereas the detenial cecocolon pouch is technically simpler. 6 refs,1 tab.
文摘应用比较分子力场分析(Comparative molecular force field analysis,CoMFA)方法研究了18种氟喹诺酮C-3噻唑酮衍生物对胰腺Capan-1细胞的体外抗增殖活性(p A).训练集中14个化合物用于建立预测模型,测试集6个化合物(含模板分子和新设计的1个分子)作为模型验证.通过基于配体的原子契合的叠合方式,获得了训练集的统计显著模型.CoMFA模型使用3个主成分给出交叉验证系数(R 2 cv)值为0.436,非交叉验证系数(R 2)值为0.956,估计F值为72.217.结果显示,模型具有良好的稳健性与预测能力.基于CoMFA等高线图,揭示了该系列化合物抗增殖活性的一些关键结构因素.这些结果为理解其作用机制、设计具有高抗肿瘤活性的新型氟喹诺酮C-3噻唑酮类化合物提供有益的理论参考.
