Multi-level spatial index techniques are always used in large spatial databases. After a general survey of R-tree relevant techniques, this paper presents a novel 2-level index structure, which is based on the schemas...Multi-level spatial index techniques are always used in large spatial databases. After a general survey of R-tree relevant techniques, this paper presents a novel 2-level index structure, which is based on the schemas of spatial grids, Hilbert R-tree and common R-tree. This structure is named H2R-tree, and it is specifically suitable for the indexing highly skewed, distributed, and large spatial database. Algorithms and a sample are given subsequently.展开更多
目的观察穴位埋线治疗2型糖尿病前期患者的临床疗效。方法将240例2型糖尿病前期患者随机分为治疗组和对照组,每组120例。对照组采用饮食控制及运动治疗,治疗组在对照组治疗基础上采用穴位埋线治疗。观察两组治疗前后空腹血糖(FPG)、餐后...目的观察穴位埋线治疗2型糖尿病前期患者的临床疗效。方法将240例2型糖尿病前期患者随机分为治疗组和对照组,每组120例。对照组采用饮食控制及运动治疗,治疗组在对照组治疗基础上采用穴位埋线治疗。观察两组治疗前后空腹血糖(FPG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(GHB)及体重指数(BMI)变化情况,比较两组临床疗效。结果两组治疗后FPG、2 h PG及GHB与同组治疗前比较,差异均具有统计学意义(P<0.05)。治疗组治疗后FPG及GHB与对照组比较,差异均具有统计学意义(P<0.05)。治疗组总有效率为98.3%,对照组为85.0%,两组比较差异具有统计学意义(P<0.05)。结论穴位埋线可改善2型糖尿病前期患者的糖耐量,减少糖尿病发生率。展开更多
Zinc(Zn) ferti-fortification using different sources and methods in Zn deficient soils is being advocated to increase Zn concentration in rice kernel as an alternative to pursuing greater Zn-use efficiency(ZnUE). A tw...Zinc(Zn) ferti-fortification using different sources and methods in Zn deficient soils is being advocated to increase Zn concentration in rice kernel as an alternative to pursuing greater Zn-use efficiency(ZnUE). A two-year field study was conducted to assess the effect of Zn application on Zn content and uptake at several growth stages and in several parts of the rice kernel: hull, bran, and the white rice kernel. Variety ‘PB 1509' with 1.25 kg Zn ha^(-1) as Zn-EDTA + 0.5% foliar spray(FS) at maximum tillering(MT) and panicle initiation(PI) stages registered the highest Zn content in hull, bran, and white rice kernel. Among parts of the rice kernel, Zn concentration decreased in the order hull > bran > white rice kernel,indicating that brown rice kernels are much denser in Zn content than polished rice.Considering the higher Zn accumulation in the bran, brown rice consumption, especially in Asia and Africa, could be recommended to overcome Zn malnutrition. The variety ‘PB 1401'showed the highest Zn uptake in rice straw, while ‘PB 1509' showed the highest Zn uptake in hull and white rice kernel. Application of 1.25 kg Zn ha^(-1)(Zn-EDTA) + 0.5% FS at MT and PI and 2.5 kg Zn ha^(-1) ZnSO_4·7H_2O(ZnSHH) + 0.5% FS at MT and PI resulted in higher Zn uptake than other treatments. On average, about one third of total Zn uptake remained in the white rice kernel, with the remaining two thirds accumulating in both hull and bran of brown rice. Zn-EDTA along with 0.5% FS, despite the application of a lower quantity of Zn leading to the highest Zn mobilization efficiency index(ZnMEI) and Zn-induced nitrogen recovery efficiency(ZniNRE), produced the highest kernel yield. However, of the two Zn sources, Zn-EDTA contributed more to the increase in ZnUE than did ZnSHH.展开更多
文摘Multi-level spatial index techniques are always used in large spatial databases. After a general survey of R-tree relevant techniques, this paper presents a novel 2-level index structure, which is based on the schemas of spatial grids, Hilbert R-tree and common R-tree. This structure is named H2R-tree, and it is specifically suitable for the indexing highly skewed, distributed, and large spatial database. Algorithms and a sample are given subsequently.
文摘目的观察穴位埋线治疗2型糖尿病前期患者的临床疗效。方法将240例2型糖尿病前期患者随机分为治疗组和对照组,每组120例。对照组采用饮食控制及运动治疗,治疗组在对照组治疗基础上采用穴位埋线治疗。观察两组治疗前后空腹血糖(FPG)、餐后2 h血糖(2 h PG)、糖化血红蛋白(GHB)及体重指数(BMI)变化情况,比较两组临床疗效。结果两组治疗后FPG、2 h PG及GHB与同组治疗前比较,差异均具有统计学意义(P<0.05)。治疗组治疗后FPG及GHB与对照组比较,差异均具有统计学意义(P<0.05)。治疗组总有效率为98.3%,对照组为85.0%,两组比较差异具有统计学意义(P<0.05)。结论穴位埋线可改善2型糖尿病前期患者的糖耐量,减少糖尿病发生率。
基金the financial assistance received in the form of Senior Research Fellowship from the Director, ICAR-Indian Agricultural Research Institute, New Delhi, India, during his Doctor of Philosophy degree program
文摘Zinc(Zn) ferti-fortification using different sources and methods in Zn deficient soils is being advocated to increase Zn concentration in rice kernel as an alternative to pursuing greater Zn-use efficiency(ZnUE). A two-year field study was conducted to assess the effect of Zn application on Zn content and uptake at several growth stages and in several parts of the rice kernel: hull, bran, and the white rice kernel. Variety ‘PB 1509' with 1.25 kg Zn ha^(-1) as Zn-EDTA + 0.5% foliar spray(FS) at maximum tillering(MT) and panicle initiation(PI) stages registered the highest Zn content in hull, bran, and white rice kernel. Among parts of the rice kernel, Zn concentration decreased in the order hull > bran > white rice kernel,indicating that brown rice kernels are much denser in Zn content than polished rice.Considering the higher Zn accumulation in the bran, brown rice consumption, especially in Asia and Africa, could be recommended to overcome Zn malnutrition. The variety ‘PB 1401'showed the highest Zn uptake in rice straw, while ‘PB 1509' showed the highest Zn uptake in hull and white rice kernel. Application of 1.25 kg Zn ha^(-1)(Zn-EDTA) + 0.5% FS at MT and PI and 2.5 kg Zn ha^(-1) ZnSO_4·7H_2O(ZnSHH) + 0.5% FS at MT and PI resulted in higher Zn uptake than other treatments. On average, about one third of total Zn uptake remained in the white rice kernel, with the remaining two thirds accumulating in both hull and bran of brown rice. Zn-EDTA along with 0.5% FS, despite the application of a lower quantity of Zn leading to the highest Zn mobilization efficiency index(ZnMEI) and Zn-induced nitrogen recovery efficiency(ZniNRE), produced the highest kernel yield. However, of the two Zn sources, Zn-EDTA contributed more to the increase in ZnUE than did ZnSHH.
