IMPROVING THE DIRECT METHOD FOR SOLVING SUPERSTRUCTURES

GU YUAN-XIN

doi:10.7498/aps.45.1840

Abstract
Direct methods have been proved to be effective and objective for solving superstructures. Two algorithms have been proposed to further improve the efficiency. The first was the same number of E's in all reflection groups. The second was a set of artificial E's in phase derivation to eliminate the effect from abnormal distribution of E values. The new algorithms have been incorporated into new version of SAPI.
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GU YUAN-XIN

1.
中国科学院物理研究所
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Cited By

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[2]	Wang Tian-Yin, Qin Su-Juan, Wen Qiao-Yan, Zhun Fu-Chen. Analysis and improvement of multiparty controlled quantum secure direct communication protocol. Acta Physica Sinica, 2008, 57(12): 7452-7456. doi: 10.7498/aps.57.7452
[3]	Ge Yu-Cheng, Li Yuan-Jing, Kang Ke-Jun. Direct measurement of the temporal structure of narrow bandwidth femtosecond XUV using ultra-short laser via differential photoelectron energy spectrum. Acta Physica Sinica, 2005, 54(6): 2669-2675. doi: 10.7498/aps.54.2669
[4]	YANG SHI-XIN, LI FANG-HUA, LIU YU-DONG, GU YUAN-XIN, FAN HAI-FU. APPLICATION OF DIRECT METHOD TO ELECTRON CRYSTALLOGRAPHIC IMAGE PROCESSING FOR T WO-DIMENSIONAL PROTEIN CRYSTALS. Acta Physica Sinica, 2000, 49(10): 1982-1987. doi: 10.7498/aps.49.1982
[5]	LIU ZHONG-ZHU, HUANG NIAN-NING. SOLITON SOLUTIONS OF THE GENERALIZED NONLINEAR SCHR?DINGER EQUATION WITH HIGHER-ORDER CORRECTIONS BY THE DIRECT METHOD OF HIROTA. Acta Physica Sinica, 1991, 40(1): 1-7. doi: 10.7498/aps.40.1
[6]	Zheng Qi-tai. THE TRIAL AND ERROR PROCEDURES IN THE DIRECT METHOD (Ⅱ). Acta Physica Sinica, 1986, 35(9): 1134-1141. doi: 10.7498/aps.35.1134
[7]	ZHENG QI-TAI. THE TRIAL AND ERROR PROCEDURES IN THE DIRECT METHOD (Ⅰ). Acta Physica Sinica, 1985, 34(10): 1280-1290. doi: 10.7498/aps.34.1280
[8]	FAN HAI-FU. ENANTIOMORPHIC PHASE AMBIGUITIES AND THE MODIFIED COMPONENT RELATION——THE APPLICATION OF DIRECT METHODS TO PROTEIN STRUCTURES. Acta Physica Sinica, 1984, 33(3): 399-407. doi: 10.7498/aps.33.399
[9]	GU YUAN-XIN, FAN HAI-FU, QIAN JIN-ZI, ZHENG CHAO-DE, HAN FU-SEN, XU ZHANG-BAO. APPLICATION OF THE DIRECT METHODS IN THE DETERMI-NATION OF THE SUPERSTRUCTURE OF HUANGHOITE. Acta Physica Sinica, 1982, 31(9): 1263-1266. doi: 10.7498/aps.31.1263
[10]	FAN HAI-FU. AN IMPROVED PROCEDURE OF SOLVING DIFFERENCE STRUCTURES. Acta Physica Sinica, 1981, 30(11): 1539-1542. doi: 10.7498/aps.30.1539
[11]	SHI HE, HAO BAI-LIN. CLOSED-FORM APPROXIMATION FOR THE 3-DIMENSIONAL ISING MODEL (Ⅲ)——THE POSSIBILITY OF IMPROVING THE NUMERICAL RESULTS WITH HYPERCOMPLEX NUMBER SYSTEMS. Acta Physica Sinica, 1981, 30(9): 1225-1233. doi: 10.7498/aps.30.1225
[12]	ZHENG QI-TAI, GU YUAN-XIN, ZHENG CHAO-DE, QIAN JIN-ZI. OPTIMAL SELECTION ON STARTING REFLECTIONS IN DIRECT METHODS (II). Acta Physica Sinica, 1981, 30(5): 610-617. doi: 10.7498/aps.30.610
[13]	FAN HAI-FU, HAN FU-SEN, ZHENG QI-TAI, GU YUAN-XIN. THE COMBINATION OF ANOMALOUS SCATTERING METHOD AND DIRECT METHOD. Acta Physica Sinica, 1981, 30(1): 130-132. doi: 10.7498/aps.30.130
[14]	FAN HAI-FU, HAN FU-SEN, HE CUN-HANG. ON THE APPLICATION OF HEAVY ATOM INFORMATION IN DIRECT METHODS——PHASE ESTIMATION OF THE STRUCTURE FACTORS IN CRYSTALS CONTAINING HEAVY ATOMS. Acta Physica Sinica, 1981, 30(7): 916-920. doi: 10.7498/aps.30.916
[15]	FAN HAI-FU, QIAN JIN-ZI. PROCEDURE FOR SOLVING THE PROBLEM OF PHASE DEGENERATION RESULTING FROM DIRECT METHODS. Acta Physica Sinica, 1981, 30(5): 594-601. doi: 10.7498/aps.30.594
[16]	ZHENG QI-TAI. AN OPTIMAL SELECTION METHOD ON STARTING REFLEXION SET IN DIRECT METHOD. Acta Physica Sinica, 1980, 29(4): 447-453. doi: 10.7498/aps.29.447
[17]	FAN HAI-FU, ZHENG QI-TAI. ELIMINATION OF THE FOUR-FOLD AMBIGUITIES DUE TO THE ARRANGEMENT OF HEAVY ATOMS BY MAKING USE OF THE DIRECT METHOD. Acta Physica Sinica, 1980, 29(10): 1347-1350. doi: 10.7498/aps.29.1347
[18]	FAN HAI-FU, ZHENG QI-TAI. THE PROBLEM OF AMBIGUITY IN PATTERSON ANALYSIS TREATED BY DIRECT METHOD. Acta Physica Sinica, 1978, 27(2): 169-174. doi: 10.7498/aps.27.169
[19]	FAN HAI-FU, HE LUO, QIAN JIN-ZI, LIU SHI-XIANG. SOLVING CRYSTAL SUPERSTRUCTURES BY THE DIRECT METHOD. Acta Physica Sinica, 1978, 27(5): 554-558. doi: 10.7498/aps.27.554
[20]	. ВЫВОД НОВЫХ И ИЗВЕСТНЫХ РАВЕНСТВ В ПРЯМОМ МЕТОДЕ СТРУКТУРНОГО АНАЛИЗА. Acta Physica Sinica, 1963, 19(9): 560-566. doi: 10.7498/aps.19.560

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Vol. 45, Issue 11 - 1996-06-05

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