A system study of the three-dimensional normal stress for regulating electronic structure and magnetic property of Fe_2Ge is studied. The density states of Fe more than 92% contribution come from Fe 3d,the density sta...A system study of the three-dimensional normal stress for regulating electronic structure and magnetic property of Fe_2Ge is studied. The density states of Fe more than 92% contribution come from Fe 3d,the density states of Ge mainly contributed from Ge 4p and Ge 4s,and the Fe 3d spin induces the Ge 4p electron transfer. The inductive effect increases germanium electron energy,weakens the Fe spin density of states,opposes the stability of the ferromagnetic state. The magnetic moment varies from 5 to 3 μB with the stress charges from-30 to 30 GPa. The charge of Fe is negative whereas the Ge atom is positively charged,the Fe atom loses charge,the charge transfers to the Ge atom. The unevenly distributed charge forms the newoccupy state and spin polarization state in the Fe_2Ge electron structure system. The Fe is the electron donor,the total electron is transferred to Ge,but the total numbers of gain electron and total numbers of lost electron are not equal,so the Fe_2Ge electron system may have hybridization between the Fe 3d state and Ge 4p state.The magnetic of Fe_2Ge mainly comes from the unoccupied Fe 3d orbital,the Fe 3d is positive spinpolarization state and the spin-polarization strength is decreased,the Ge 4p is negative spin-polarization state and the spin-polarization strength are increased. M oreover,electrons-spin polarization is relevant to the structure parameters of the Fe_2Ge system,and controls spin-polarized electronic behavior by means of adjusting ferromagnetic.展开更多
目的 分析2021年宁波市初高中新生结核菌素皮肤(purified protein derivatives,PPD)试验筛查结果,为完善学校结核病防控策略提供科学依据。方法 对宁波市2021年秋季入学的高中及寄宿制初中新生进行问卷调查,对无PPD试验禁忌证者采用孟...目的 分析2021年宁波市初高中新生结核菌素皮肤(purified protein derivatives,PPD)试验筛查结果,为完善学校结核病防控策略提供科学依据。方法 对宁波市2021年秋季入学的高中及寄宿制初中新生进行问卷调查,对无PPD试验禁忌证者采用孟都氏法进行初筛,PPD试验强阳者再行胸部X线检查。分析比较新生的结核分枝杆菌(Mycobacterium tuberculosis,MTB)感染率与患者检出情况。结果 2021年宁波市初高中新生PPD试验平均筛查率94.63%,平均禁忌证率3.01%。MTB感染率4.96%,PPD试验强阳性率1.45%,且均存在卡介菌纯蛋白衍生物(purified protein derivative of BCG,BCG-PPD)试剂使用地区高于结核菌素纯蛋白衍生物(purified protein derivative of TB,TB-PPD)使用地区,女生高于男生,高中高于初中的规律,差异有统计学意义(均P<0.01)。采用PPD试验筛查方法共发现16例学生肺结核患者,占宁波市全年16岁以下学生患者的38.10%,不同试剂患者发现率差异无统计学意义(P=0.70)。结论 采用PPD试验进行初高中肺结核筛查行之有效,各地应严格落实《规范》要求,建立新生入学肺结核筛查长效机制。展开更多
Nowadays,people still rely on traditional heating methods in rural areas of northern China,such as Kang(bed-stoves) and burning caves in cold winter.Field measurements of indoor environment were carried out in several...Nowadays,people still rely on traditional heating methods in rural areas of northern China,such as Kang(bed-stoves) and burning caves in cold winter.Field measurements of indoor environment were carried out in several rural houses with burning-cave-coil-Kang coupling heating system in northern China.The results show that this system is able to realize the graded use of internal energy of burning cave.The temperature of supply pipe water ranged from 30 ℃ to 50 ℃ which met the demands in 74.7% of time.The surface temperature of Kang maintained at above 25 ℃.Compared with traditional burning cave,using burning-cave-coil-Kang coupled with heating system has a higher thermal efficiency of 48.9%,which is 8.32% higher than the traditional one.展开更多
INTRODUCTION Delirium is a significant independent indicator of poor prognoses for critically ill patients （including in-hospital mortality, prolonged hospitalization, increased medical costs, and long-term cognitive...INTRODUCTION Delirium is a significant independent indicator of poor prognoses for critically ill patients （including in-hospital mortality, prolonged hospitalization, increased medical costs, and long-term cognitive impairment）. Intensive care medicine experts have been paying attention to and carried out research on delirium for better prediction, prevention, management, and treatment, and even better prognosis of patients in critical condition. Based on the latest findings of theoretical research and in combination with clinical experience, literature on delirium has been reviewed and ten points of basic understanding of delirium in critically ill patients have been identified.展开更多
基金Sponsored by the Science and Technology Foundation of Guizhou Province,China(Grant Nos.LH[2016]7077,LH[2015]7218)the Youth Science and Technology Talents Growth Fund Program of GuiZhou Province Education Department,China(Grant No.KY[2016]166)the Innovation Group Major Program of Guizhou Province(Grant Nos.KY[2016]028,KY[2016]029,KY[2016]030)
文摘A system study of the three-dimensional normal stress for regulating electronic structure and magnetic property of Fe_2Ge is studied. The density states of Fe more than 92% contribution come from Fe 3d,the density states of Ge mainly contributed from Ge 4p and Ge 4s,and the Fe 3d spin induces the Ge 4p electron transfer. The inductive effect increases germanium electron energy,weakens the Fe spin density of states,opposes the stability of the ferromagnetic state. The magnetic moment varies from 5 to 3 μB with the stress charges from-30 to 30 GPa. The charge of Fe is negative whereas the Ge atom is positively charged,the Fe atom loses charge,the charge transfers to the Ge atom. The unevenly distributed charge forms the newoccupy state and spin polarization state in the Fe_2Ge electron structure system. The Fe is the electron donor,the total electron is transferred to Ge,but the total numbers of gain electron and total numbers of lost electron are not equal,so the Fe_2Ge electron system may have hybridization between the Fe 3d state and Ge 4p state.The magnetic of Fe_2Ge mainly comes from the unoccupied Fe 3d orbital,the Fe 3d is positive spinpolarization state and the spin-polarization strength is decreased,the Ge 4p is negative spin-polarization state and the spin-polarization strength are increased. M oreover,electrons-spin polarization is relevant to the structure parameters of the Fe_2Ge system,and controls spin-polarized electronic behavior by means of adjusting ferromagnetic.
文摘目的 分析2021年宁波市初高中新生结核菌素皮肤(purified protein derivatives,PPD)试验筛查结果,为完善学校结核病防控策略提供科学依据。方法 对宁波市2021年秋季入学的高中及寄宿制初中新生进行问卷调查,对无PPD试验禁忌证者采用孟都氏法进行初筛,PPD试验强阳者再行胸部X线检查。分析比较新生的结核分枝杆菌(Mycobacterium tuberculosis,MTB)感染率与患者检出情况。结果 2021年宁波市初高中新生PPD试验平均筛查率94.63%,平均禁忌证率3.01%。MTB感染率4.96%,PPD试验强阳性率1.45%,且均存在卡介菌纯蛋白衍生物(purified protein derivative of BCG,BCG-PPD)试剂使用地区高于结核菌素纯蛋白衍生物(purified protein derivative of TB,TB-PPD)使用地区,女生高于男生,高中高于初中的规律,差异有统计学意义(均P<0.01)。采用PPD试验筛查方法共发现16例学生肺结核患者,占宁波市全年16岁以下学生患者的38.10%,不同试剂患者发现率差异无统计学意义(P=0.70)。结论 采用PPD试验进行初高中肺结核筛查行之有效,各地应严格落实《规范》要求,建立新生入学肺结核筛查长效机制。
基金Sponsored by the National Natural Science Foundation of China(Grant No.51178075)the Fundamental Research Funds for the Central Universities(Grant No.DUT17RW118)
文摘Nowadays,people still rely on traditional heating methods in rural areas of northern China,such as Kang(bed-stoves) and burning caves in cold winter.Field measurements of indoor environment were carried out in several rural houses with burning-cave-coil-Kang coupling heating system in northern China.The results show that this system is able to realize the graded use of internal energy of burning cave.The temperature of supply pipe water ranged from 30 ℃ to 50 ℃ which met the demands in 74.7% of time.The surface temperature of Kang maintained at above 25 ℃.Compared with traditional burning cave,using burning-cave-coil-Kang coupled with heating system has a higher thermal efficiency of 48.9%,which is 8.32% higher than the traditional one.
文摘INTRODUCTION Delirium is a significant independent indicator of poor prognoses for critically ill patients （including in-hospital mortality, prolonged hospitalization, increased medical costs, and long-term cognitive impairment）. Intensive care medicine experts have been paying attention to and carried out research on delirium for better prediction, prevention, management, and treatment, and even better prognosis of patients in critical condition. Based on the latest findings of theoretical research and in combination with clinical experience, literature on delirium has been reviewed and ten points of basic understanding of delirium in critically ill patients have been identified.
