標(biāo)題: Titlebook: Direct Methods of Solving Crystal Structures; Henk Schenk Book 1991 Springer Science+Business Media New York 1991 DSI_D012 [打印本頁] 作者: 女孩 時(shí)間: 2025-3-21 18:48
書目名稱Direct Methods of Solving Crystal Structures影響因子(影響力)
書目名稱Direct Methods of Solving Crystal Structures影響因子(影響力)學(xué)科排名
書目名稱Direct Methods of Solving Crystal Structures網(wǎng)絡(luò)公開度
書目名稱Direct Methods of Solving Crystal Structures網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Direct Methods of Solving Crystal Structures被引頻次
書目名稱Direct Methods of Solving Crystal Structures被引頻次學(xué)科排名
書目名稱Direct Methods of Solving Crystal Structures年度引用
書目名稱Direct Methods of Solving Crystal Structures年度引用學(xué)科排名
書目名稱Direct Methods of Solving Crystal Structures讀者反饋
書目名稱Direct Methods of Solving Crystal Structures讀者反饋學(xué)科排名
作者: 虛度 時(shí)間: 2025-3-21 22:05
Symbolic Addition,1991; Schenk and Kiers, 1983; Overbeek and Schenk, 1978; Schenk, 1971). For an Advanced Study Instute there is one more advantage: the procedures used in Symbolic Addition enable easy insight in the actual processes going on in Direct Methods and as a result it is of great educational value too.作者: 語言學(xué) 時(shí)間: 2025-3-22 02:17 作者: BET 時(shí)間: 2025-3-22 04:36 作者: 微粒 時(shí)間: 2025-3-22 12:09
Quartets and Other Phase Relationships,nts and those, for which it is possible to estimate phase sums. Of course, for direct methods the latter are the only important invariants, because reliable phase relationships are the basis of all existing phasing methods, whereas for any structure there are millions more of useless structure invariants.作者: 無價(jià)值 時(shí)間: 2025-3-22 14:57
Patterson Methods,stripped of all else, this statement expresses the fundamental process of structure determination. The important point is that some extra information however meagre has to be added to the diffraction data.作者: 無價(jià)值 時(shí)間: 2025-3-22 19:17 作者: Palter 時(shí)間: 2025-3-23 00:12
Martin Beck-Burridge,Jeremy Walton1991; Schenk and Kiers, 1983; Overbeek and Schenk, 1978; Schenk, 1971). For an Advanced Study Instute there is one more advantage: the procedures used in Symbolic Addition enable easy insight in the actual processes going on in Direct Methods and as a result it is of great educational value too.作者: 鑒賞家 時(shí)間: 2025-3-23 02:22
Mayank Jyotsna Soni,Soumya Sarkar atoms) and since many more intensities can be measured, relationships among the structure factors F., and thus among the phases ., must exist. Direct Methods identify and use these phase relationships to solve the phase problem.作者: forthy 時(shí)間: 2025-3-23 07:37
Sports Performance and the Brain in greater detail, could restrict general phases in the non-centrosymmetric case and Sayre’s equation (Sayre, 1952) could be applied to any equal-atom structure regardless of space group and therefore could put some constraints on the phases of the involved structure factors.作者: Finasteride 時(shí)間: 2025-3-23 12:20 作者: strdulate 時(shí)間: 2025-3-23 17:54
An Elementary Introduction to Direct Methods, atoms) and since many more intensities can be measured, relationships among the structure factors F., and thus among the phases ., must exist. Direct Methods identify and use these phase relationships to solve the phase problem.作者: 射手座 時(shí)間: 2025-3-23 20:01
The Cochran Distribution, in greater detail, could restrict general phases in the non-centrosymmetric case and Sayre’s equation (Sayre, 1952) could be applied to any equal-atom structure regardless of space group and therefore could put some constraints on the phases of the involved structure factors.作者: Pituitary-Gland 時(shí)間: 2025-3-24 00:41
Some Applications of Probability Theory in Direct Methods,n, there have been numerous applications of probability theory to the problem of crystal structure determination. They have essentially provided a solution for the case of small molecule crystal structures.作者: 大暴雨 時(shí)間: 2025-3-24 03:13
NATO Science Series B:http://image.papertrans.cn/e/image/280623.jpg作者: 凹室 時(shí)間: 2025-3-24 07:16 作者: impale 時(shí)間: 2025-3-24 14:38 作者: abreast 時(shí)間: 2025-3-24 18:28
Martin Beck-Burridge,Jeremy WaltonA single three-phase relationship, cast in the form . is capable of giving an estimate of the value of ?(h) if the values of the phases on the right-hand side are known. The question now arises of finding the overall estimate if there are several pairs of known phases, the estimate from each of which might well be different.作者: CAMEO 時(shí)間: 2025-3-24 19:11
Uwe G. Kersting,Filip G. LysdalThree major themes are developed:作者: 時(shí)間等 時(shí)間: 2025-3-24 23:16
Sport Technology Effectiveness,The Maximum Entropy Method (MEM) is not a completely different approach from Conventional Direct Methods (CDM) : it is an . of the latter at the level of the techniques of Analytic Probability Theory on which they are based.作者: 無能的人 時(shí)間: 2025-3-25 07:05 作者: perpetual 時(shí)間: 2025-3-25 10:15
Starting Set Determinaton,For most practical applications of direct methods it is convenient to distinguish the following stages:.In this chapter we discuss some practical aspects of (a) and (b) with emphasis on the determination of the starting set. But how to choose starting reflections depends on what we plan to do with them!作者: OVER 時(shí)間: 2025-3-25 13:53
Tangent Formula, Tangent Refinement and Multisolution Methods,A single three-phase relationship, cast in the form . is capable of giving an estimate of the value of ?(h) if the values of the phases on the right-hand side are known. The question now arises of finding the overall estimate if there are several pairs of known phases, the estimate from each of which might well be different.作者: Adherent 時(shí)間: 2025-3-25 17:51 作者: obviate 時(shí)間: 2025-3-25 21:36
Introduction to Maximum Entropy,The Maximum Entropy Method (MEM) is not a completely different approach from Conventional Direct Methods (CDM) : it is an . of the latter at the level of the techniques of Analytic Probability Theory on which they are based.作者: resuscitation 時(shí)間: 2025-3-26 02:40 作者: 狂熱語言 時(shí)間: 2025-3-26 05:07
The Calculation of Normalized Structure Factors and of Triplet Invariants, do not give rise to systematic absences. It also allows to obtain an estimate both of the scale factor by which one has to multiply the measured data to scale them to their absolute value, and of the temperature factor. Finally it is a basic step in the calculation of ., which will be seen to be useful quantities when using direct methods.作者: Antigen 時(shí)間: 2025-3-26 09:23
The Joint Probability Distribution of Three Structure Factors Leading to a Distribution for the Triof three structure factors via its characteristic function. Assuming an a priori probabilistic model of uniformly and independently distributed atoms, the calculations result in the well-known Cochran distribution for the triplet phase sum.作者: evasive 時(shí)間: 2025-3-26 14:07 作者: 不給啤 時(shí)間: 2025-3-26 19:36
Mayank Jyotsna Soni,Soumya Sarkared straightforward from I. but the relative phases . are lost in the experiment and cause the so called phase problem. Direct methods try to evaluate phases . “directly” from the measured diffraction intensities I. by using relationships among the phases, relationships, whose values are based on the作者: Between 時(shí)間: 2025-3-26 23:05
The 2014 FIFA World Cup in Brazil,f the crystal; this means that in the three-dimensional lattice, generated by the basic vectors, the lattice points represent positions that are translational equivalent, i.e. points that have identical surroundings in the same orientation. In order to define a crystal structure completely it is suf作者: Androgen 時(shí)間: 2025-3-27 01:15 作者: ACTIN 時(shí)間: 2025-3-27 06:41
Sports Performance and the Brainy of the Harker-Kasper type (Harker & Kasper, 1948) and/or the triple sign relationship for solving either centrosymmetric structures or centrosymmetric projections of non-centrosymmetric structures. In fact some of the very earliest theoretical work pointed towards the possibility of applying direc作者: 失敗主義者 時(shí)間: 2025-3-27 11:24
Neural Mechanisms of Muscle Crampequalities hold: .where the (complex) normalized structure factor E. is defined by . H is an arbitrary reciprocal lattice vector, Z. is the atomic number and r. the position vector of the atom labeled j, N is the number of atoms in the unit cell, and ..作者: 刺耳的聲音 時(shí)間: 2025-3-27 16:28 作者: 華而不實(shí) 時(shí)間: 2025-3-27 20:06 作者: esculent 時(shí)間: 2025-3-28 00:44
On Track to Post-Leyland Recoverye choice of origin are called structure invariants. When it is possible to estimate the phase sum of an invariant, this sum is generally called a phase relationship. Although in principle a phase relationship is always a structure invariant, it is sensible to make the distinction between all invaria作者: auxiliary 時(shí)間: 2025-3-28 02:40
Martin Beck-Burridge,Jeremy Waltonof three structure factors via its characteristic function. Assuming an a priori probabilistic model of uniformly and independently distributed atoms, the calculations result in the well-known Cochran distribution for the triplet phase sum.作者: 身體萌芽 時(shí)間: 2025-3-28 09:53
Uwe G. Kersting,Shariman Ismadi Ismailion problem. Crystals, which are usually defined in terms of the long range ordering they display, might appear to be poor samples on which to apply a mathematical model devised to deal with random experiments. It is the realization that the periodically repeating motif could itself be depicted as c作者: 軌道 時(shí)間: 2025-3-28 10:52 作者: osculate 時(shí)間: 2025-3-28 15:13 作者: hauteur 時(shí)間: 2025-3-28 19:42 作者: Outwit 時(shí)間: 2025-3-28 23:36 作者: GUEER 時(shí)間: 2025-3-29 06:01 作者: Evolve 時(shí)間: 2025-3-29 09:51
0258-1221 Overview: 978-1-4899-3694-3978-1-4899-3692-9Series ISSN 0258-1221 作者: Autobiography 時(shí)間: 2025-3-29 12:11
Neural Mechanisms of Muscle Crampequalities hold: .where the (complex) normalized structure factor E. is defined by . H is an arbitrary reciprocal lattice vector, Z. is the atomic number and r. the position vector of the atom labeled j, N is the number of atoms in the unit cell, and ..作者: HARP 時(shí)間: 2025-3-29 19:15 作者: 廚房里面 時(shí)間: 2025-3-29 19:48
Martin Beck-Burridge,Jeremy Waltonof three structure factors via its characteristic function. Assuming an a priori probabilistic model of uniformly and independently distributed atoms, the calculations result in the well-known Cochran distribution for the triplet phase sum.作者: interrupt 時(shí)間: 2025-3-30 03:27
Sports Volunteers Around the Globeds would still be an esoteric, little used branch of crystallography rather than the most important technique available for solving the structures of ‘small’ molecules. The packages which will be discussed here are (in alphabetical order):作者: Defraud 時(shí)間: 2025-3-30 04:08
An Elementary Introduction to Direct Methods,ed straightforward from I. but the relative phases . are lost in the experiment and cause the so called phase problem. Direct methods try to evaluate phases . “directly” from the measured diffraction intensities I. by using relationships among the phases, relationships, whose values are based on the作者: CLOWN 時(shí)間: 2025-3-30 09:06
Structure Invariants, Seminvariants and Origin Definition,f the crystal; this means that in the three-dimensional lattice, generated by the basic vectors, the lattice points represent positions that are translational equivalent, i.e. points that have identical surroundings in the same orientation. In order to define a crystal structure completely it is suf作者: ascend 時(shí)間: 2025-3-30 12:36 作者: 貪心 時(shí)間: 2025-3-30 20:25 作者: 傷心 時(shí)間: 2025-3-30 23:11
Determinantal Inequalities Lead to Triplet and Quartet Relationships,equalities hold: .where the (complex) normalized structure factor E. is defined by . H is an arbitrary reciprocal lattice vector, Z. is the atomic number and r. the position vector of the atom labeled j, N is the number of atoms in the unit cell, and ..作者: 價(jià)值在貶值 時(shí)間: 2025-3-31 02:52 作者: shrill 時(shí)間: 2025-3-31 07:26
Symbolic Addition,ads to very fast-running programs; structures are solved in a fraction of the time necessary to carry out a complete multisolution approach (Peschar, 1991; Schenk and Kiers, 1983; Overbeek and Schenk, 1978; Schenk, 1971). For an Advanced Study Instute there is one more advantage: the procedures used作者: 情愛 時(shí)間: 2025-3-31 12:09
Quartets and Other Phase Relationships,e choice of origin are called structure invariants. When it is possible to estimate the phase sum of an invariant, this sum is generally called a phase relationship. Although in principle a phase relationship is always a structure invariant, it is sensible to make the distinction between all invaria作者: Charlatan 時(shí)間: 2025-3-31 15:16
The Joint Probability Distribution of Three Structure Factors Leading to a Distribution for the Triof three structure factors via its characteristic function. Assuming an a priori probabilistic model of uniformly and independently distributed atoms, the calculations result in the well-known Cochran distribution for the triplet phase sum.作者: expdient 時(shí)間: 2025-3-31 21:18
Some Applications of Probability Theory in Direct Methods,ion problem. Crystals, which are usually defined in terms of the long range ordering they display, might appear to be poor samples on which to apply a mathematical model devised to deal with random experiments. It is the realization that the periodically repeating motif could itself be depicted as c作者: moratorium 時(shí)間: 2025-3-31 22:14 作者: 太空 時(shí)間: 2025-4-1 05:18
Patterson Methods,diffraction experiment) and some other information about the structure to obtain the positions of the atoms within the crystal unit cell. Other facts about the structure, such as thermal motion etc., may be obtained and with restricted data it is true that atomic resolution may not be achieved, but 作者: Anthology 時(shí)間: 2025-4-1 07:16 作者: synovium 時(shí)間: 2025-4-1 11:16
The Method of Representations of Structure Seminvariants I: The General Background,
